From c4869de2c791985539b642ec22606a3cebc03778 Mon Sep 17 00:00:00 2001 From: "Peter S. Mazinger" Date: Mon, 28 Nov 2005 16:39:11 +0000 Subject: Rename regex.c to regex_old.c --- libc/misc/regex/Makefile.in | 2 +- libc/misc/regex/regex.c | 8383 ------------------------------------------- libc/misc/regex/regex_old.c | 8383 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 8384 insertions(+), 8384 deletions(-) delete mode 100644 libc/misc/regex/regex.c create mode 100644 libc/misc/regex/regex_old.c (limited to 'libc/misc') diff --git a/libc/misc/regex/Makefile.in b/libc/misc/regex/Makefile.in index 50d2c2d06..5c86e874d 100644 --- a/libc/misc/regex/Makefile.in +++ b/libc/misc/regex/Makefile.in @@ -6,7 +6,7 @@ # Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. # -CSRC:=regex.c +CSRC:=regex_old.c MISC_REGEX_DIR:=$(top_srcdir)libc/misc/regex MISC_REGEX_OUT:=$(top_builddir)libc/misc/regex diff --git a/libc/misc/regex/regex.c b/libc/misc/regex/regex.c deleted file mode 100644 index 10fd95220..000000000 --- a/libc/misc/regex/regex.c +++ /dev/null @@ -1,8383 +0,0 @@ -/* Extended regular expression matching and search library, - version 0.12. - (Implements POSIX draft P1003.2/D11.2, except for some of the - internationalization features.) - Copyright (C) 1993-1999, 2000, 2001 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#define HAVE_MEMPCPY -#define __mempcpy __libc_mempcpy -#define memset __memset -#define memcmp __memcmp -#define strcmp __strcmp -#define strlen __strlen -#define wcslen __wcslen -/* for some reason this does not work */ -#define memcpy __memcpy - -/* To exclude some unwanted junk.... */ -#undef _LIBC -#undef emacs -#define _REGEX_RE_COMP -#include -#include -#include -#define STDC_HEADERS -#define RE_TRANSLATE_TYPE char * - -extern void *__libc_mempcpy (void *__restrict __dest, - __const void *__restrict __src, size_t __n) /*attribute_hidden*/; - -/* AIX requires this to be the first thing in the file. */ -#if defined _AIX && !defined REGEX_MALLOC - #pragma alloca -#endif - -#undef _GNU_SOURCE -#define _GNU_SOURCE - -#ifdef HAVE_CONFIG_H -# include -#endif - -#ifndef PARAMS -# if defined __GNUC__ || (defined __STDC__ && __STDC__) -# define PARAMS(args) args -# else -# define PARAMS(args) () -# endif /* GCC. */ -#endif /* Not PARAMS. */ - -#ifndef INSIDE_RECURSION - -# if defined STDC_HEADERS && !defined emacs -# include -# else -/* We need this for `regex.h', and perhaps for the Emacs include files. */ -# include -# endif - - -/* For platform which support the ISO C amendement 1 functionality we - support user defined character classes. */ -#if defined __UCLIBC_HAS_WCHAR__ -# define WIDE_CHAR_SUPPORT 1 -/* Solaris 2.5 has a bug: must be included before . */ -# include -# include -# endif - -# ifdef _LIBC -/* We have to keep the namespace clean. */ -# define regfree(preg) __regfree (preg) -# define regexec(pr, st, nm, pm, ef) __regexec (pr, st, nm, pm, ef) -# define regcomp(preg, pattern, cflags) __regcomp (preg, pattern, cflags) -# define regerror(errcode, preg, errbuf, errbuf_size) \ - __regerror(errcode, preg, errbuf, errbuf_size) -# define re_set_registers(bu, re, nu, st, en) \ - __re_set_registers (bu, re, nu, st, en) -# define re_match_2(bufp, string1, size1, string2, size2, pos, regs, stop) \ - __re_match_2 (bufp, string1, size1, string2, size2, pos, regs, stop) -# define re_match(bufp, string, size, pos, regs) \ - __re_match (bufp, string, size, pos, regs) -# define re_search(bufp, string, size, startpos, range, regs) \ - __re_search (bufp, string, size, startpos, range, regs) -# define re_compile_pattern(pattern, length, bufp) \ - __re_compile_pattern (pattern, length, bufp) -# define re_set_syntax(syntax) __re_set_syntax (syntax) -# define re_search_2(bufp, st1, s1, st2, s2, startpos, range, regs, stop) \ - __re_search_2 (bufp, st1, s1, st2, s2, startpos, range, regs, stop) -# define re_compile_fastmap(bufp) __re_compile_fastmap (bufp) - -# define btowc __btowc - -/* We are also using some library internals. */ -# include -# include -# include -# include -# endif - -/* This is for other GNU distributions with internationalized messages. */ -# if HAVE_LIBINTL_H || defined _LIBC -# include -# ifdef _LIBC -# undef gettext -# define gettext(msgid) __dcgettext ("libc", msgid, LC_MESSAGES) -# endif -# else -# define gettext(msgid) (msgid) -# endif - -# ifndef gettext_noop -/* This define is so xgettext can find the internationalizable - strings. */ -# define gettext_noop(String) String -# endif - -/* The `emacs' switch turns on certain matching commands - that make sense only in Emacs. */ -# ifdef emacs - -# include "lisp.h" -# include "buffer.h" -# include "syntax.h" - -# else /* not emacs */ - -/* If we are not linking with Emacs proper, - we can't use the relocating allocator - even if config.h says that we can. */ -# undef REL_ALLOC - -# if defined STDC_HEADERS || defined _LIBC -# include -# else -char *malloc (); -char *realloc (); -# endif - -/* When used in Emacs's lib-src, we need to get bzero and bcopy somehow. - If nothing else has been done, use the method below. */ -# ifdef INHIBIT_STRING_HEADER -# if !(defined HAVE_BZERO && defined HAVE_BCOPY) -# if !defined bzero && !defined bcopy -# undef INHIBIT_STRING_HEADER -# endif -# endif -# endif - -/* This is the normal way of making sure we have a bcopy and a bzero. - This is used in most programs--a few other programs avoid this - by defining INHIBIT_STRING_HEADER. */ -# ifndef INHIBIT_STRING_HEADER -# if defined HAVE_STRING_H || defined STDC_HEADERS || defined _LIBC -# include -# ifndef bzero -# ifndef _LIBC -# define bzero(s, n) (memset (s, '\0', n), (s)) -# else -# define bzero(s, n) __bzero (s, n) -# endif -# endif -# else -# include -# ifndef memcmp -# define memcmp(s1, s2, n) bcmp (s1, s2, n) -# endif -# ifndef memcpy -# define memcpy(d, s, n) (bcopy (s, d, n), (d)) -# endif -# endif -# endif - -/* Define the syntax stuff for \<, \>, etc. */ - -/* This must be nonzero for the wordchar and notwordchar pattern - commands in re_match_2. */ -# ifndef Sword -# define Sword 1 -# endif - -# ifdef SWITCH_ENUM_BUG -# define SWITCH_ENUM_CAST(x) ((int)(x)) -# else -# define SWITCH_ENUM_CAST(x) (x) -# endif - -# endif /* not emacs */ - -# if defined _LIBC || HAVE_LIMITS_H -# include -# endif - -# ifndef MB_LEN_MAX -# define MB_LEN_MAX 1 -# endif - -/* Get the interface, including the syntax bits. */ -# include - -/* isalpha etc. are used for the character classes. */ -# include - -/* Jim Meyering writes: - - "... Some ctype macros are valid only for character codes that - isascii says are ASCII (SGI's IRIX-4.0.5 is one such system --when - using /bin/cc or gcc but without giving an ansi option). So, all - ctype uses should be through macros like ISPRINT... If - STDC_HEADERS is defined, then autoconf has verified that the ctype - macros don't need to be guarded with references to isascii. ... - Defining isascii to 1 should let any compiler worth its salt - eliminate the && through constant folding." - Solaris defines some of these symbols so we must undefine them first. */ - -# undef ISASCII -# if defined STDC_HEADERS || (!defined isascii && !defined HAVE_ISASCII) -# define ISASCII(c) 1 -# else -# define ISASCII(c) isascii(c) -# endif - -# ifdef isblank -# define ISBLANK(c) (ISASCII (c) && isblank (c)) -# else -# define ISBLANK(c) ((c) == ' ' || (c) == '\t') -# endif -# ifdef isgraph -# define ISGRAPH(c) (ISASCII (c) && isgraph (c)) -# else -# define ISGRAPH(c) (ISASCII (c) && isprint (c) && !isspace (c)) -# endif - -# undef ISPRINT -# define ISPRINT(c) (ISASCII (c) && isprint (c)) -# define ISDIGIT(c) (ISASCII (c) && isdigit (c)) -# define ISALNUM(c) (ISASCII (c) && isalnum (c)) -# define ISALPHA(c) (ISASCII (c) && isalpha (c)) -# define ISCNTRL(c) (ISASCII (c) && iscntrl (c)) -# define ISLOWER(c) (ISASCII (c) && islower (c)) -# define ISPUNCT(c) (ISASCII (c) && ispunct (c)) -# define ISSPACE(c) (ISASCII (c) && isspace (c)) -# define ISUPPER(c) (ISASCII (c) && isupper (c)) -# define ISXDIGIT(c) (ISASCII (c) && isxdigit (c)) - -# ifdef _tolower -# define TOLOWER(c) _tolower(c) -# else -# define TOLOWER(c) tolower(c) -# endif - -# ifndef NULL -# define NULL (void *)0 -# endif - -/* We remove any previous definition of `SIGN_EXTEND_CHAR', - since ours (we hope) works properly with all combinations of - machines, compilers, `char' and `unsigned char' argument types. - (Per Bothner suggested the basic approach.) */ -# undef SIGN_EXTEND_CHAR -# if __STDC__ -# define SIGN_EXTEND_CHAR(c) ((signed char) (c)) -# else /* not __STDC__ */ -/* As in Harbison and Steele. */ -# define SIGN_EXTEND_CHAR(c) ((((unsigned char) (c)) ^ 128) - 128) -# endif - -# ifndef emacs -/* How many characters in the character set. */ -# define CHAR_SET_SIZE 256 - -# ifdef SYNTAX_TABLE - -extern char *re_syntax_table; - -# else /* not SYNTAX_TABLE */ - -static char re_syntax_table[CHAR_SET_SIZE]; - -static void init_syntax_once PARAMS ((void)); - -static void -init_syntax_once () -{ - register int c; - static int done = 0; - - if (done) - return; - bzero (re_syntax_table, sizeof re_syntax_table); - - for (c = 0; c < CHAR_SET_SIZE; ++c) - if (ISALNUM (c)) - re_syntax_table[c] = Sword; - - re_syntax_table['_'] = Sword; - - done = 1; -} - -# endif /* not SYNTAX_TABLE */ - -# define SYNTAX(c) re_syntax_table[(unsigned char) (c)] - -# endif /* emacs */ - -/* Integer type for pointers. */ -# if !defined _LIBC -typedef unsigned long int uintptr_t; -# endif - -/* Should we use malloc or alloca? If REGEX_MALLOC is not defined, we - use `alloca' instead of `malloc'. This is because using malloc in - re_search* or re_match* could cause memory leaks when C-g is used in - Emacs; also, malloc is slower and causes storage fragmentation. On - the other hand, malloc is more portable, and easier to debug. - - Because we sometimes use alloca, some routines have to be macros, - not functions -- `alloca'-allocated space disappears at the end of the - function it is called in. */ - -# ifdef REGEX_MALLOC - -# define REGEX_ALLOCATE malloc -# define REGEX_REALLOCATE(source, osize, nsize) realloc (source, nsize) -# define REGEX_FREE free - -# else /* not REGEX_MALLOC */ - -/* Emacs already defines alloca, sometimes. */ -# ifndef alloca - -/* Make alloca work the best possible way. */ -# ifdef __GNUC__ -# define alloca __builtin_alloca -# else /* not __GNUC__ */ -# if HAVE_ALLOCA_H -# include -# endif /* HAVE_ALLOCA_H */ -# endif /* not __GNUC__ */ - -# endif /* not alloca */ - -# define REGEX_ALLOCATE alloca - -/* Assumes a `char *destination' variable. */ -# define REGEX_REALLOCATE(source, osize, nsize) \ - (destination = (char *) alloca (nsize), \ - memcpy (destination, source, osize)) - -/* No need to do anything to free, after alloca. */ -# define REGEX_FREE(arg) ((void)0) /* Do nothing! But inhibit gcc warning. */ - -# endif /* not REGEX_MALLOC */ - -/* Define how to allocate the failure stack. */ - -# if defined REL_ALLOC && defined REGEX_MALLOC - -# define REGEX_ALLOCATE_STACK(size) \ - r_alloc (&failure_stack_ptr, (size)) -# define REGEX_REALLOCATE_STACK(source, osize, nsize) \ - r_re_alloc (&failure_stack_ptr, (nsize)) -# define REGEX_FREE_STACK(ptr) \ - r_alloc_free (&failure_stack_ptr) - -# else /* not using relocating allocator */ - -# ifdef REGEX_MALLOC - -# define REGEX_ALLOCATE_STACK malloc -# define REGEX_REALLOCATE_STACK(source, osize, nsize) realloc (source, nsize) -# define REGEX_FREE_STACK free - -# else /* not REGEX_MALLOC */ - -# define REGEX_ALLOCATE_STACK alloca - -# define REGEX_REALLOCATE_STACK(source, osize, nsize) \ - REGEX_REALLOCATE (source, osize, nsize) -/* No need to explicitly free anything. */ -# define REGEX_FREE_STACK(arg) - -# endif /* not REGEX_MALLOC */ -# endif /* not using relocating allocator */ - - -/* True if `size1' is non-NULL and PTR is pointing anywhere inside - `string1' or just past its end. This works if PTR is NULL, which is - a good thing. */ -# define FIRST_STRING_P(ptr) \ - (size1 && string1 <= (ptr) && (ptr) <= string1 + size1) - -/* (Re)Allocate N items of type T using malloc, or fail. */ -# define TALLOC(n, t) ((t *) malloc ((n) * sizeof (t))) -# define RETALLOC(addr, n, t) ((addr) = (t *) realloc (addr, (n) * sizeof (t))) -# define RETALLOC_IF(addr, n, t) \ - if (addr) RETALLOC((addr), (n), t); else (addr) = TALLOC ((n), t) -# define REGEX_TALLOC(n, t) ((t *) REGEX_ALLOCATE ((n) * sizeof (t))) - -# define BYTEWIDTH 8 /* In bits. */ - -# define STREQ(s1, s2) ((strcmp (s1, s2) == 0)) - -# undef MAX -# undef MIN -# define MAX(a, b) ((a) > (b) ? (a) : (b)) -# define MIN(a, b) ((a) < (b) ? (a) : (b)) - -typedef char boolean; -# define false 0 -# define true 1 - -static reg_errcode_t byte_regex_compile _RE_ARGS ((const char *pattern, size_t size, - reg_syntax_t syntax, - struct re_pattern_buffer *bufp)); - -static int byte_re_match_2_internal PARAMS ((struct re_pattern_buffer *bufp, - const char *string1, int size1, - const char *string2, int size2, - int pos, - struct re_registers *regs, - int stop)); -static int byte_re_search_2 PARAMS ((struct re_pattern_buffer *bufp, - const char *string1, int size1, - const char *string2, int size2, - int startpos, int range, - struct re_registers *regs, int stop)); -static int byte_re_compile_fastmap PARAMS ((struct re_pattern_buffer *bufp)); - -#ifdef MBS_SUPPORT -static reg_errcode_t wcs_regex_compile _RE_ARGS ((const char *pattern, size_t size, - reg_syntax_t syntax, - struct re_pattern_buffer *bufp)); - - -static int wcs_re_match_2_internal PARAMS ((struct re_pattern_buffer *bufp, - const char *cstring1, int csize1, - const char *cstring2, int csize2, - int pos, - struct re_registers *regs, - int stop, - wchar_t *string1, int size1, - wchar_t *string2, int size2, - int *mbs_offset1, int *mbs_offset2)); -static int wcs_re_search_2 PARAMS ((struct re_pattern_buffer *bufp, - const char *string1, int size1, - const char *string2, int size2, - int startpos, int range, - struct re_registers *regs, int stop)); -static int wcs_re_compile_fastmap PARAMS ((struct re_pattern_buffer *bufp)); -#endif - -/* These are the command codes that appear in compiled regular - expressions. Some opcodes are followed by argument bytes. A - command code can specify any interpretation whatsoever for its - arguments. Zero bytes may appear in the compiled regular expression. */ - -typedef enum -{ - no_op = 0, - - /* Succeed right away--no more backtracking. */ - succeed, - - /* Followed by one byte giving n, then by n literal bytes. */ - exactn, - -# ifdef MBS_SUPPORT - /* Same as exactn, but contains binary data. */ - exactn_bin, -# endif - - /* Matches any (more or less) character. */ - anychar, - - /* Matches any one char belonging to specified set. First - following byte is number of bitmap bytes. Then come bytes - for a bitmap saying which chars are in. Bits in each byte - are ordered low-bit-first. A character is in the set if its - bit is 1. A character too large to have a bit in the map is - automatically not in the set. */ - /* ifdef MBS_SUPPORT, following element is length of character - classes, length of collating symbols, length of equivalence - classes, length of character ranges, and length of characters. - Next, character class element, collating symbols elements, - equivalence class elements, range elements, and character - elements follow. - See regex_compile function. */ - charset, - - /* Same parameters as charset, but match any character that is - not one of those specified. */ - charset_not, - - /* Start remembering the text that is matched, for storing in a - register. Followed by one byte with the register number, in - the range 0 to one less than the pattern buffer's re_nsub - field. Then followed by one byte with the number of groups - inner to this one. (This last has to be part of the - start_memory only because we need it in the on_failure_jump - of re_match_2.) */ - start_memory, - - /* Stop remembering the text that is matched and store it in a - memory register. Followed by one byte with the register - number, in the range 0 to one less than `re_nsub' in the - pattern buffer, and one byte with the number of inner groups, - just like `start_memory'. (We need the number of inner - groups here because we don't have any easy way of finding the - corresponding start_memory when we're at a stop_memory.) */ - stop_memory, - - /* Match a duplicate of something remembered. Followed by one - byte containing the register number. */ - duplicate, - - /* Fail unless at beginning of line. */ - begline, - - /* Fail unless at end of line. */ - endline, - - /* Succeeds if at beginning of buffer (if emacs) or at beginning - of string to be matched (if not). */ - begbuf, - - /* Analogously, for end of buffer/string. */ - endbuf, - - /* Followed by two byte relative address to which to jump. */ - jump, - - /* Same as jump, but marks the end of an alternative. */ - jump_past_alt, - - /* Followed by two-byte relative address of place to resume at - in case of failure. */ - /* ifdef MBS_SUPPORT, the size of address is 1. */ - on_failure_jump, - - /* Like on_failure_jump, but pushes a placeholder instead of the - current string position when executed. */ - on_failure_keep_string_jump, - - /* Throw away latest failure point and then jump to following - two-byte relative address. */ - /* ifdef MBS_SUPPORT, the size of address is 1. */ - pop_failure_jump, - - /* Change to pop_failure_jump if know won't have to backtrack to - match; otherwise change to jump. This is used to jump - back to the beginning of a repeat. If what follows this jump - clearly won't match what the repeat does, such that we can be - sure that there is no use backtracking out of repetitions - already matched, then we change it to a pop_failure_jump. - Followed by two-byte address. */ - /* ifdef MBS_SUPPORT, the size of address is 1. */ - maybe_pop_jump, - - /* Jump to following two-byte address, and push a dummy failure - point. This failure point will be thrown away if an attempt - is made to use it for a failure. A `+' construct makes this - before the first repeat. Also used as an intermediary kind - of jump when compiling an alternative. */ - /* ifdef MBS_SUPPORT, the size of address is 1. */ - dummy_failure_jump, - - /* Push a dummy failure point and continue. Used at the end of - alternatives. */ - push_dummy_failure, - - /* Followed by two-byte relative address and two-byte number n. - After matching N times, jump to the address upon failure. */ - /* ifdef MBS_SUPPORT, the size of address is 1. */ - succeed_n, - - /* Followed by two-byte relative address, and two-byte number n. - Jump to the address N times, then fail. */ - /* ifdef MBS_SUPPORT, the size of address is 1. */ - jump_n, - - /* Set the following two-byte relative address to the - subsequent two-byte number. The address *includes* the two - bytes of number. */ - /* ifdef MBS_SUPPORT, the size of address is 1. */ - set_number_at, - - wordchar, /* Matches any word-constituent character. */ - notwordchar, /* Matches any char that is not a word-constituent. */ - - wordbeg, /* Succeeds if at word beginning. */ - wordend, /* Succeeds if at word end. */ - - wordbound, /* Succeeds if at a word boundary. */ - notwordbound /* Succeeds if not at a word boundary. */ - -# ifdef emacs - ,before_dot, /* Succeeds if before point. */ - at_dot, /* Succeeds if at point. */ - after_dot, /* Succeeds if after point. */ - - /* Matches any character whose syntax is specified. Followed by - a byte which contains a syntax code, e.g., Sword. */ - syntaxspec, - - /* Matches any character whose syntax is not that specified. */ - notsyntaxspec -# endif /* emacs */ -} re_opcode_t; -#endif /* not INSIDE_RECURSION */ - - -#ifdef BYTE -# define CHAR_T char -# define UCHAR_T unsigned char -# define COMPILED_BUFFER_VAR bufp->buffer -# define OFFSET_ADDRESS_SIZE 2 -# define PREFIX(name) byte_##name -# define ARG_PREFIX(name) name -# define PUT_CHAR(c) putchar (c) -#else -# ifdef WCHAR -# define CHAR_T wchar_t -# define UCHAR_T wchar_t -# define COMPILED_BUFFER_VAR wc_buffer -# define OFFSET_ADDRESS_SIZE 1 /* the size which STORE_NUMBER macro use */ -# define CHAR_CLASS_SIZE ((__alignof__(wctype_t)+sizeof(wctype_t))/sizeof(CHAR_T)+1) -# define PREFIX(name) wcs_##name -# define ARG_PREFIX(name) c##name -/* Should we use wide stream?? */ -# define PUT_CHAR(c) printf ("%C", c); -# define TRUE 1 -# define FALSE 0 -# else -# ifdef MBS_SUPPORT -# define WCHAR -# define INSIDE_RECURSION -# include "regex.c" -# undef INSIDE_RECURSION -# endif -# define BYTE -# define INSIDE_RECURSION -# include "regex.c" -# undef INSIDE_RECURSION -# endif -#endif - -#ifdef INSIDE_RECURSION -/* Common operations on the compiled pattern. */ - -/* Store NUMBER in two contiguous bytes starting at DESTINATION. */ -/* ifdef MBS_SUPPORT, we store NUMBER in 1 element. */ - -# ifdef WCHAR -# define STORE_NUMBER(destination, number) \ - do { \ - *(destination) = (UCHAR_T)(number); \ - } while (0) -# else /* BYTE */ -# define STORE_NUMBER(destination, number) \ - do { \ - (destination)[0] = (number) & 0377; \ - (destination)[1] = (number) >> 8; \ - } while (0) -# endif /* WCHAR */ - -/* Same as STORE_NUMBER, except increment DESTINATION to - the byte after where the number is stored. Therefore, DESTINATION - must be an lvalue. */ -/* ifdef MBS_SUPPORT, we store NUMBER in 1 element. */ - -# define STORE_NUMBER_AND_INCR(destination, number) \ - do { \ - STORE_NUMBER (destination, number); \ - (destination) += OFFSET_ADDRESS_SIZE; \ - } while (0) - -/* Put into DESTINATION a number stored in two contiguous bytes starting - at SOURCE. */ -/* ifdef MBS_SUPPORT, we store NUMBER in 1 element. */ - -# ifdef WCHAR -# define EXTRACT_NUMBER(destination, source) \ - do { \ - (destination) = *(source); \ - } while (0) -# else /* BYTE */ -# define EXTRACT_NUMBER(destination, source) \ - do { \ - (destination) = *(source) & 0377; \ - (destination) += SIGN_EXTEND_CHAR (*((source) + 1)) << 8; \ - } while (0) -# endif - -# ifdef DEBUG -static void PREFIX(extract_number) _RE_ARGS ((int *dest, UCHAR_T *source)); -static void -PREFIX(extract_number) (dest, source) - int *dest; - UCHAR_T *source; -{ -# ifdef WCHAR - *dest = *source; -# else /* BYTE */ - int temp = SIGN_EXTEND_CHAR (*(source + 1)); - *dest = *source & 0377; - *dest += temp << 8; -# endif -} - -# ifndef EXTRACT_MACROS /* To debug the macros. */ -# undef EXTRACT_NUMBER -# define EXTRACT_NUMBER(dest, src) PREFIX(extract_number) (&dest, src) -# endif /* not EXTRACT_MACROS */ - -# endif /* DEBUG */ - -/* Same as EXTRACT_NUMBER, except increment SOURCE to after the number. - SOURCE must be an lvalue. */ - -# define EXTRACT_NUMBER_AND_INCR(destination, source) \ - do { \ - EXTRACT_NUMBER (destination, source); \ - (source) += OFFSET_ADDRESS_SIZE; \ - } while (0) - -# ifdef DEBUG -static void PREFIX(extract_number_and_incr) _RE_ARGS ((int *destination, - UCHAR_T **source)); -static void -PREFIX(extract_number_and_incr) (destination, source) - int *destination; - UCHAR_T **source; -{ - PREFIX(extract_number) (destination, *source); - *source += OFFSET_ADDRESS_SIZE; -} - -# ifndef EXTRACT_MACROS -# undef EXTRACT_NUMBER_AND_INCR -# define EXTRACT_NUMBER_AND_INCR(dest, src) \ - PREFIX(extract_number_and_incr) (&dest, &src) -# endif /* not EXTRACT_MACROS */ - -# endif /* DEBUG */ - - - -/* If DEBUG is defined, Regex prints many voluminous messages about what - it is doing (if the variable `debug' is nonzero). If linked with the - main program in `iregex.c', you can enter patterns and strings - interactively. And if linked with the main program in `main.c' and - the other test files, you can run the already-written tests. */ - -# ifdef DEBUG - -# ifndef DEFINED_ONCE - -/* We use standard I/O for debugging. */ -# include - -/* It is useful to test things that ``must'' be true when debugging. */ -# include - -static int debug; - -# define DEBUG_STATEMENT(e) e -# define DEBUG_PRINT1(x) if (debug) printf (x) -# define DEBUG_PRINT2(x1, x2) if (debug) printf (x1, x2) -# define DEBUG_PRINT3(x1, x2, x3) if (debug) printf (x1, x2, x3) -# define DEBUG_PRINT4(x1, x2, x3, x4) if (debug) printf (x1, x2, x3, x4) -# endif /* not DEFINED_ONCE */ - -# define DEBUG_PRINT_COMPILED_PATTERN(p, s, e) \ - if (debug) PREFIX(print_partial_compiled_pattern) (s, e) -# define DEBUG_PRINT_DOUBLE_STRING(w, s1, sz1, s2, sz2) \ - if (debug) PREFIX(print_double_string) (w, s1, sz1, s2, sz2) - - -/* Print the fastmap in human-readable form. */ - -# ifndef DEFINED_ONCE -void -print_fastmap (fastmap) - char *fastmap; -{ - unsigned was_a_range = 0; - unsigned i = 0; - - while (i < (1 << BYTEWIDTH)) - { - if (fastmap[i++]) - { - was_a_range = 0; - putchar (i - 1); - while (i < (1 << BYTEWIDTH) && fastmap[i]) - { - was_a_range = 1; - i++; - } - if (was_a_range) - { - printf ("-"); - putchar (i - 1); - } - } - } - putchar ('\n'); -} -# endif /* not DEFINED_ONCE */ - - -/* Print a compiled pattern string in human-readable form, starting at - the START pointer into it and ending just before the pointer END. */ - -void -PREFIX(print_partial_compiled_pattern) (start, end) - UCHAR_T *start; - UCHAR_T *end; -{ - int mcnt, mcnt2; - UCHAR_T *p1; - UCHAR_T *p = start; - UCHAR_T *pend = end; - - if (start == NULL) - { - printf ("(null)\n"); - return; - } - - /* Loop over pattern commands. */ - while (p < pend) - { -# ifdef _LIBC - printf ("%td:\t", p - start); -# else - printf ("%ld:\t", (long int) (p - start)); -# endif - - switch ((re_opcode_t) *p++) - { - case no_op: - printf ("/no_op"); - break; - - case exactn: - mcnt = *p++; - printf ("/exactn/%d", mcnt); - do - { - putchar ('/'); - PUT_CHAR (*p++); - } - while (--mcnt); - break; - -# ifdef MBS_SUPPORT - case exactn_bin: - mcnt = *p++; - printf ("/exactn_bin/%d", mcnt); - do - { - printf("/%lx", (long int) *p++); - } - while (--mcnt); - break; -# endif /* MBS_SUPPORT */ - - case start_memory: - mcnt = *p++; - printf ("/start_memory/%d/%ld", mcnt, (long int) *p++); - break; - - case stop_memory: - mcnt = *p++; - printf ("/stop_memory/%d/%ld", mcnt, (long int) *p++); - break; - - case duplicate: - printf ("/duplicate/%ld", (long int) *p++); - break; - - case anychar: - printf ("/anychar"); - break; - - case charset: - case charset_not: - { -# ifdef WCHAR - int i, length; - wchar_t *workp = p; - printf ("/charset [%s", - (re_opcode_t) *(workp - 1) == charset_not ? "^" : ""); - p += 5; - length = *workp++; /* the length of char_classes */ - for (i=0 ; ibuffer; - - PREFIX(print_partial_compiled_pattern) (buffer, buffer - + bufp->used / sizeof(UCHAR_T)); - printf ("%ld bytes used/%ld bytes allocated.\n", - bufp->used, bufp->allocated); - - if (bufp->fastmap_accurate && bufp->fastmap) - { - printf ("fastmap: "); - print_fastmap (bufp->fastmap); - } - -# ifdef _LIBC - printf ("re_nsub: %Zd\t", bufp->re_nsub); -# else - printf ("re_nsub: %ld\t", (long int) bufp->re_nsub); -# endif - printf ("regs_alloc: %d\t", bufp->regs_allocated); - printf ("can_be_null: %d\t", bufp->can_be_null); - printf ("newline_anchor: %d\n", bufp->newline_anchor); - printf ("no_sub: %d\t", bufp->no_sub); - printf ("not_bol: %d\t", bufp->not_bol); - printf ("not_eol: %d\t", bufp->not_eol); - printf ("syntax: %lx\n", bufp->syntax); - /* Perhaps we should print the translate table? */ -} - - -void -PREFIX(print_double_string) (where, string1, size1, string2, size2) - const CHAR_T *where; - const CHAR_T *string1; - const CHAR_T *string2; - int size1; - int size2; -{ - int this_char; - - if (where == NULL) - printf ("(null)"); - else - { - int cnt; - - if (FIRST_STRING_P (where)) - { - for (this_char = where - string1; this_char < size1; this_char++) - PUT_CHAR (string1[this_char]); - - where = string2; - } - - cnt = 0; - for (this_char = where - string2; this_char < size2; this_char++) - { - PUT_CHAR (string2[this_char]); - if (++cnt > 100) - { - fputs ("...", stdout); - break; - } - } - } -} - -# ifndef DEFINED_ONCE -void -printchar (c) - int c; -{ - putc (c, stderr); -} -# endif - -# else /* not DEBUG */ - -# ifndef DEFINED_ONCE -# undef assert -# define assert(e) - -# define DEBUG_STATEMENT(e) -# define DEBUG_PRINT1(x) -# define DEBUG_PRINT2(x1, x2) -# define DEBUG_PRINT3(x1, x2, x3) -# define DEBUG_PRINT4(x1, x2, x3, x4) -# endif /* not DEFINED_ONCE */ -# define DEBUG_PRINT_COMPILED_PATTERN(p, s, e) -# define DEBUG_PRINT_DOUBLE_STRING(w, s1, sz1, s2, sz2) - -# endif /* not DEBUG */ - - - -# ifdef WCHAR -/* This convert a multibyte string to a wide character string. - And write their correspondances to offset_buffer(see below) - and write whether each wchar_t is binary data to is_binary. - This assume invalid multibyte sequences as binary data. - We assume offset_buffer and is_binary is already allocated - enough space. */ - -static size_t convert_mbs_to_wcs (CHAR_T *dest, const unsigned char* src, - size_t len, int *offset_buffer, - char *is_binary); -static size_t -convert_mbs_to_wcs (dest, src, len, offset_buffer, is_binary) - CHAR_T *dest; - const unsigned char* src; - size_t len; /* the length of multibyte string. */ - - /* It hold correspondances between src(char string) and - dest(wchar_t string) for optimization. - e.g. src = "xxxyzz" - dest = {'X', 'Y', 'Z'} - (each "xxx", "y" and "zz" represent one multibyte character - corresponding to 'X', 'Y' and 'Z'.) - offset_buffer = {0, 0+3("xxx"), 0+3+1("y"), 0+3+1+2("zz")} - = {0, 3, 4, 6} - */ - int *offset_buffer; - char *is_binary; -{ - wchar_t *pdest = dest; - const unsigned char *psrc = src; - size_t wc_count = 0; - - mbstate_t mbs; - int i, consumed; - size_t mb_remain = len; - size_t mb_count = 0; - - /* Initialize the conversion state. */ - memset (&mbs, 0, sizeof (mbstate_t)); - - offset_buffer[0] = 0; - for( ; mb_remain > 0 ; ++wc_count, ++pdest, mb_remain -= consumed, - psrc += consumed) - { -#ifdef _LIBC - consumed = __mbrtowc (pdest, psrc, mb_remain, &mbs); -#else - consumed = mbrtowc (pdest, psrc, mb_remain, &mbs); -#endif - - if (consumed <= 0) - /* failed to convert. maybe src contains binary data. - So we consume 1 byte manualy. */ - { - *pdest = *psrc; - consumed = 1; - is_binary[wc_count] = TRUE; - } - else - is_binary[wc_count] = FALSE; - /* In sjis encoding, we use yen sign as escape character in - place of reverse solidus. So we convert 0x5c(yen sign in - sjis) to not 0xa5(yen sign in UCS2) but 0x5c(reverse - solidus in UCS2). */ - if (consumed == 1 && (int) *psrc == 0x5c && (int) *pdest == 0xa5) - *pdest = (wchar_t) *psrc; - - offset_buffer[wc_count + 1] = mb_count += consumed; - } - - /* Fill remain of the buffer with sentinel. */ - for (i = wc_count + 1 ; i <= len ; i++) - offset_buffer[i] = mb_count + 1; - - return wc_count; -} - -# endif /* WCHAR */ - -#else /* not INSIDE_RECURSION */ - -/* Set by `re_set_syntax' to the current regexp syntax to recognize. Can - also be assigned to arbitrarily: each pattern buffer stores its own - syntax, so it can be changed between regex compilations. */ -/* This has no initializer because initialized variables in Emacs - become read-only after dumping. */ -reg_syntax_t re_syntax_options; - - -/* Specify the precise syntax of regexps for compilation. This provides - for compatibility for various utilities which historically have - different, incompatible syntaxes. - - The argument SYNTAX is a bit mask comprised of the various bits - defined in regex.h. We return the old syntax. */ - -reg_syntax_t -re_set_syntax (syntax) - reg_syntax_t syntax; -{ - reg_syntax_t ret = re_syntax_options; - - re_syntax_options = syntax; -# ifdef DEBUG - if (syntax & RE_DEBUG) - debug = 1; - else if (debug) /* was on but now is not */ - debug = 0; -# endif /* DEBUG */ - return ret; -} -# ifdef _LIBC -weak_alias (__re_set_syntax, re_set_syntax) -# endif - -/* This table gives an error message for each of the error codes listed - in regex.h. Obviously the order here has to be same as there. - POSIX doesn't require that we do anything for REG_NOERROR, - but why not be nice? */ - -static const char re_error_msgid[] = - { -# define REG_NOERROR_IDX 0 - gettext_noop ("Success") /* REG_NOERROR */ - "\0" -# define REG_NOMATCH_IDX (REG_NOERROR_IDX + sizeof "Success") - gettext_noop ("No match") /* REG_NOMATCH */ - "\0" -# define REG_BADPAT_IDX (REG_NOMATCH_IDX + sizeof "No match") - gettext_noop ("Invalid regular expression") /* REG_BADPAT */ - "\0" -# define REG_ECOLLATE_IDX (REG_BADPAT_IDX + sizeof "Invalid regular expression") - gettext_noop ("Invalid collation character") /* REG_ECOLLATE */ - "\0" -# define REG_ECTYPE_IDX (REG_ECOLLATE_IDX + sizeof "Invalid collation character") - gettext_noop ("Invalid character class name") /* REG_ECTYPE */ - "\0" -# define REG_EESCAPE_IDX (REG_ECTYPE_IDX + sizeof "Invalid character class name") - gettext_noop ("Trailing backslash") /* REG_EESCAPE */ - "\0" -# define REG_ESUBREG_IDX (REG_EESCAPE_IDX + sizeof "Trailing backslash") - gettext_noop ("Invalid back reference") /* REG_ESUBREG */ - "\0" -# define REG_EBRACK_IDX (REG_ESUBREG_IDX + sizeof "Invalid back reference") - gettext_noop ("Unmatched [ or [^") /* REG_EBRACK */ - "\0" -# define REG_EPAREN_IDX (REG_EBRACK_IDX + sizeof "Unmatched [ or [^") - gettext_noop ("Unmatched ( or \\(") /* REG_EPAREN */ - "\0" -# define REG_EBRACE_IDX (REG_EPAREN_IDX + sizeof "Unmatched ( or \\(") - gettext_noop ("Unmatched \\{") /* REG_EBRACE */ - "\0" -# define REG_BADBR_IDX (REG_EBRACE_IDX + sizeof "Unmatched \\{") - gettext_noop ("Invalid content of \\{\\}") /* REG_BADBR */ - "\0" -# define REG_ERANGE_IDX (REG_BADBR_IDX + sizeof "Invalid content of \\{\\}") - gettext_noop ("Invalid range end") /* REG_ERANGE */ - "\0" -# define REG_ESPACE_IDX (REG_ERANGE_IDX + sizeof "Invalid range end") - gettext_noop ("Memory exhausted") /* REG_ESPACE */ - "\0" -# define REG_BADRPT_IDX (REG_ESPACE_IDX + sizeof "Memory exhausted") - gettext_noop ("Invalid preceding regular expression") /* REG_BADRPT */ - "\0" -# define REG_EEND_IDX (REG_BADRPT_IDX + sizeof "Invalid preceding regular expression") - gettext_noop ("Premature end of regular expression") /* REG_EEND */ - "\0" -# define REG_ESIZE_IDX (REG_EEND_IDX + sizeof "Premature end of regular expression") - gettext_noop ("Regular expression too big") /* REG_ESIZE */ - "\0" -# define REG_ERPAREN_IDX (REG_ESIZE_IDX + sizeof "Regular expression too big") - gettext_noop ("Unmatched ) or \\)") /* REG_ERPAREN */ - }; - -static const size_t re_error_msgid_idx[] = - { - REG_NOERROR_IDX, - REG_NOMATCH_IDX, - REG_BADPAT_IDX, - REG_ECOLLATE_IDX, - REG_ECTYPE_IDX, - REG_EESCAPE_IDX, - REG_ESUBREG_IDX, - REG_EBRACK_IDX, - REG_EPAREN_IDX, - REG_EBRACE_IDX, - REG_BADBR_IDX, - REG_ERANGE_IDX, - REG_ESPACE_IDX, - REG_BADRPT_IDX, - REG_EEND_IDX, - REG_ESIZE_IDX, - REG_ERPAREN_IDX - }; - -#endif /* INSIDE_RECURSION */ - -#ifndef DEFINED_ONCE -/* Avoiding alloca during matching, to placate r_alloc. */ - -/* Define MATCH_MAY_ALLOCATE unless we need to make sure that the - searching and matching functions should not call alloca. On some - systems, alloca is implemented in terms of malloc, and if we're - using the relocating allocator routines, then malloc could cause a - relocation, which might (if the strings being searched are in the - ralloc heap) shift the data out from underneath the regexp - routines. - - Here's another reason to avoid allocation: Emacs - processes input from X in a signal handler; processing X input may - call malloc; if input arrives while a matching routine is calling - malloc, then we're scrod. But Emacs can't just block input while - calling matching routines; then we don't notice interrupts when - they come in. So, Emacs blocks input around all regexp calls - except the matching calls, which it leaves unprotected, in the - faith that they will not malloc. */ - -/* Normally, this is fine. */ -# define MATCH_MAY_ALLOCATE - -/* When using GNU C, we are not REALLY using the C alloca, no matter - what config.h may say. So don't take precautions for it. */ -# ifdef __GNUC__ -# undef C_ALLOCA -# endif - -/* The match routines may not allocate if (1) they would do it with malloc - and (2) it's not safe for them to use malloc. - Note that if REL_ALLOC is defined, matching would not use malloc for the - failure stack, but we would still use it for the register vectors; - so REL_ALLOC should not affect this. */ -# if (defined C_ALLOCA || defined REGEX_MALLOC) && defined emacs -# undef MATCH_MAY_ALLOCATE -# endif -#endif /* not DEFINED_ONCE */ - -#ifdef INSIDE_RECURSION -/* Failure stack declarations and macros; both re_compile_fastmap and - re_match_2 use a failure stack. These have to be macros because of - REGEX_ALLOCATE_STACK. */ - - -/* Number of failure points for which to initially allocate space - when matching. If this number is exceeded, we allocate more - space, so it is not a hard limit. */ -# ifndef INIT_FAILURE_ALLOC -# define INIT_FAILURE_ALLOC 5 -# endif - -/* Roughly the maximum number of failure points on the stack. Would be - exactly that if always used MAX_FAILURE_ITEMS items each time we failed. - This is a variable only so users of regex can assign to it; we never - change it ourselves. */ - -# ifdef INT_IS_16BIT - -# ifndef DEFINED_ONCE -# if defined MATCH_MAY_ALLOCATE -/* 4400 was enough to cause a crash on Alpha OSF/1, - whose default stack limit is 2mb. */ -long int re_max_failures = 4000; -# else -long int re_max_failures = 2000; -# endif -# endif - -union PREFIX(fail_stack_elt) -{ - UCHAR_T *pointer; - long int integer; -}; - -typedef union PREFIX(fail_stack_elt) PREFIX(fail_stack_elt_t); - -typedef struct -{ - PREFIX(fail_stack_elt_t) *stack; - unsigned long int size; - unsigned long int avail; /* Offset of next open position. */ -} PREFIX(fail_stack_type); - -# else /* not INT_IS_16BIT */ - -# ifndef DEFINED_ONCE -# if defined MATCH_MAY_ALLOCATE -/* 4400 was enough to cause a crash on Alpha OSF/1, - whose default stack limit is 2mb. */ -int re_max_failures = 4000; -# else -int re_max_failures = 2000; -# endif -# endif - -union PREFIX(fail_stack_elt) -{ - UCHAR_T *pointer; - int integer; -}; - -typedef union PREFIX(fail_stack_elt) PREFIX(fail_stack_elt_t); - -typedef struct -{ - PREFIX(fail_stack_elt_t) *stack; - unsigned size; - unsigned avail; /* Offset of next open position. */ -} PREFIX(fail_stack_type); - -# endif /* INT_IS_16BIT */ - -# ifndef DEFINED_ONCE -# define FAIL_STACK_EMPTY() (fail_stack.avail == 0) -# define FAIL_STACK_PTR_EMPTY() (fail_stack_ptr->avail == 0) -# define FAIL_STACK_FULL() (fail_stack.avail == fail_stack.size) -# endif - - -/* Define macros to initialize and free the failure stack. - Do `return -2' if the alloc fails. */ - -# ifdef MATCH_MAY_ALLOCATE -# define INIT_FAIL_STACK() \ - do { \ - fail_stack.stack = (PREFIX(fail_stack_elt_t) *) \ - REGEX_ALLOCATE_STACK (INIT_FAILURE_ALLOC * sizeof (PREFIX(fail_stack_elt_t))); \ - \ - if (fail_stack.stack == NULL) \ - return -2; \ - \ - fail_stack.size = INIT_FAILURE_ALLOC; \ - fail_stack.avail = 0; \ - } while (0) - -# define RESET_FAIL_STACK() REGEX_FREE_STACK (fail_stack.stack) -# else -# define INIT_FAIL_STACK() \ - do { \ - fail_stack.avail = 0; \ - } while (0) - -# define RESET_FAIL_STACK() -# endif - - -/* Double the size of FAIL_STACK, up to approximately `re_max_failures' items. - - Return 1 if succeeds, and 0 if either ran out of memory - allocating space for it or it was already too large. - - REGEX_REALLOCATE_STACK requires `destination' be declared. */ - -# define DOUBLE_FAIL_STACK(fail_stack) \ - ((fail_stack).size > (unsigned) (re_max_failures * MAX_FAILURE_ITEMS) \ - ? 0 \ - : ((fail_stack).stack = (PREFIX(fail_stack_elt_t) *) \ - REGEX_REALLOCATE_STACK ((fail_stack).stack, \ - (fail_stack).size * sizeof (PREFIX(fail_stack_elt_t)), \ - ((fail_stack).size << 1) * sizeof (PREFIX(fail_stack_elt_t))),\ - \ - (fail_stack).stack == NULL \ - ? 0 \ - : ((fail_stack).size <<= 1, \ - 1))) - - -/* Push pointer POINTER on FAIL_STACK. - Return 1 if was able to do so and 0 if ran out of memory allocating - space to do so. */ -# define PUSH_PATTERN_OP(POINTER, FAIL_STACK) \ - ((FAIL_STACK_FULL () \ - && !DOUBLE_FAIL_STACK (FAIL_STACK)) \ - ? 0 \ - : ((FAIL_STACK).stack[(FAIL_STACK).avail++].pointer = POINTER, \ - 1)) - -/* Push a pointer value onto the failure stack. - Assumes the variable `fail_stack'. Probably should only - be called from within `PUSH_FAILURE_POINT'. */ -# define PUSH_FAILURE_POINTER(item) \ - fail_stack.stack[fail_stack.avail++].pointer = (UCHAR_T *) (item) - -/* This pushes an integer-valued item onto the failure stack. - Assumes the variable `fail_stack'. Probably should only - be called from within `PUSH_FAILURE_POINT'. */ -# define PUSH_FAILURE_INT(item) \ - fail_stack.stack[fail_stack.avail++].integer = (item) - -/* Push a fail_stack_elt_t value onto the failure stack. - Assumes the variable `fail_stack'. Probably should only - be called from within `PUSH_FAILURE_POINT'. */ -# define PUSH_FAILURE_ELT(item) \ - fail_stack.stack[fail_stack.avail++] = (item) - -/* These three POP... operations complement the three PUSH... operations. - All assume that `fail_stack' is nonempty. */ -# define POP_FAILURE_POINTER() fail_stack.stack[--fail_stack.avail].pointer -# define POP_FAILURE_INT() fail_stack.stack[--fail_stack.avail].integer -# define POP_FAILURE_ELT() fail_stack.stack[--fail_stack.avail] - -/* Used to omit pushing failure point id's when we're not debugging. */ -# ifdef DEBUG -# define DEBUG_PUSH PUSH_FAILURE_INT -# define DEBUG_POP(item_addr) *(item_addr) = POP_FAILURE_INT () -# else -# define DEBUG_PUSH(item) -# define DEBUG_POP(item_addr) -# endif - - -/* Push the information about the state we will need - if we ever fail back to it. - - Requires variables fail_stack, regstart, regend, reg_info, and - num_regs_pushed be declared. DOUBLE_FAIL_STACK requires `destination' - be declared. - - Does `return FAILURE_CODE' if runs out of memory. */ - -# define PUSH_FAILURE_POINT(pattern_place, string_place, failure_code) \ - do { \ - char *destination; \ - /* Must be int, so when we don't save any registers, the arithmetic \ - of 0 + -1 isn't done as unsigned. */ \ - /* Can't be int, since there is not a shred of a guarantee that int \ - is wide enough to hold a value of something to which pointer can \ - be assigned */ \ - active_reg_t this_reg; \ - \ - DEBUG_STATEMENT (failure_id++); \ - DEBUG_STATEMENT (nfailure_points_pushed++); \ - DEBUG_PRINT2 ("\nPUSH_FAILURE_POINT #%u:\n", failure_id); \ - DEBUG_PRINT2 (" Before push, next avail: %d\n", (fail_stack).avail);\ - DEBUG_PRINT2 (" size: %d\n", (fail_stack).size);\ - \ - DEBUG_PRINT2 (" slots needed: %ld\n", NUM_FAILURE_ITEMS); \ - DEBUG_PRINT2 (" available: %d\n", REMAINING_AVAIL_SLOTS); \ - \ - /* Ensure we have enough space allocated for what we will push. */ \ - while (REMAINING_AVAIL_SLOTS < NUM_FAILURE_ITEMS) \ - { \ - if (!DOUBLE_FAIL_STACK (fail_stack)) \ - return failure_code; \ - \ - DEBUG_PRINT2 ("\n Doubled stack; size now: %d\n", \ - (fail_stack).size); \ - DEBUG_PRINT2 (" slots available: %d\n", REMAINING_AVAIL_SLOTS);\ - } \ - \ - /* Push the info, starting with the registers. */ \ - DEBUG_PRINT1 ("\n"); \ - \ - if (1) \ - for (this_reg = lowest_active_reg; this_reg <= highest_active_reg; \ - this_reg++) \ - { \ - DEBUG_PRINT2 (" Pushing reg: %lu\n", this_reg); \ - DEBUG_STATEMENT (num_regs_pushed++); \ - \ - DEBUG_PRINT2 (" start: %p\n", regstart[this_reg]); \ - PUSH_FAILURE_POINTER (regstart[this_reg]); \ - \ - DEBUG_PRINT2 (" end: %p\n", regend[this_reg]); \ - PUSH_FAILURE_POINTER (regend[this_reg]); \ - \ - DEBUG_PRINT2 (" info: %p\n ", \ - reg_info[this_reg].word.pointer); \ - DEBUG_PRINT2 (" match_null=%d", \ - REG_MATCH_NULL_STRING_P (reg_info[this_reg])); \ - DEBUG_PRINT2 (" active=%d", IS_ACTIVE (reg_info[this_reg])); \ - DEBUG_PRINT2 (" matched_something=%d", \ - MATCHED_SOMETHING (reg_info[this_reg])); \ - DEBUG_PRINT2 (" ever_matched=%d", \ - EVER_MATCHED_SOMETHING (reg_info[this_reg])); \ - DEBUG_PRINT1 ("\n"); \ - PUSH_FAILURE_ELT (reg_info[this_reg].word); \ - } \ - \ - DEBUG_PRINT2 (" Pushing low active reg: %ld\n", lowest_active_reg);\ - PUSH_FAILURE_INT (lowest_active_reg); \ - \ - DEBUG_PRINT2 (" Pushing high active reg: %ld\n", highest_active_reg);\ - PUSH_FAILURE_INT (highest_active_reg); \ - \ - DEBUG_PRINT2 (" Pushing pattern %p:\n", pattern_place); \ - DEBUG_PRINT_COMPILED_PATTERN (bufp, pattern_place, pend); \ - PUSH_FAILURE_POINTER (pattern_place); \ - \ - DEBUG_PRINT2 (" Pushing string %p: `", string_place); \ - DEBUG_PRINT_DOUBLE_STRING (string_place, string1, size1, string2, \ - size2); \ - DEBUG_PRINT1 ("'\n"); \ - PUSH_FAILURE_POINTER (string_place); \ - \ - DEBUG_PRINT2 (" Pushing failure id: %u\n", failure_id); \ - DEBUG_PUSH (failure_id); \ - } while (0) - -# ifndef DEFINED_ONCE -/* This is the number of items that are pushed and popped on the stack - for each register. */ -# define NUM_REG_ITEMS 3 - -/* Individual items aside from the registers. */ -# ifdef DEBUG -# define NUM_NONREG_ITEMS 5 /* Includes failure point id. */ -# else -# define NUM_NONREG_ITEMS 4 -# endif - -/* We push at most this many items on the stack. */ -/* We used to use (num_regs - 1), which is the number of registers - this regexp will save; but that was changed to 5 - to avoid stack overflow for a regexp with lots of parens. */ -# define MAX_FAILURE_ITEMS (5 * NUM_REG_ITEMS + NUM_NONREG_ITEMS) - -/* We actually push this many items. */ -# define NUM_FAILURE_ITEMS \ - (((0 \ - ? 0 : highest_active_reg - lowest_active_reg + 1) \ - * NUM_REG_ITEMS) \ - + NUM_NONREG_ITEMS) - -/* How many items can still be added to the stack without overflowing it. */ -# define REMAINING_AVAIL_SLOTS ((fail_stack).size - (fail_stack).avail) -# endif /* not DEFINED_ONCE */ - - -/* Pops what PUSH_FAIL_STACK pushes. - - We restore into the parameters, all of which should be lvalues: - STR -- the saved data position. - PAT -- the saved pattern position. - LOW_REG, HIGH_REG -- the highest and lowest active registers. - REGSTART, REGEND -- arrays of string positions. - REG_INFO -- array of information about each subexpression. - - Also assumes the variables `fail_stack' and (if debugging), `bufp', - `pend', `string1', `size1', `string2', and `size2'. */ -# define POP_FAILURE_POINT(str, pat, low_reg, high_reg, regstart, regend, reg_info)\ -{ \ - DEBUG_STATEMENT (unsigned failure_id;) \ - active_reg_t this_reg; \ - const UCHAR_T *string_temp; \ - \ - assert (!FAIL_STACK_EMPTY ()); \ - \ - /* Remove failure points and point to how many regs pushed. */ \ - DEBUG_PRINT1 ("POP_FAILURE_POINT:\n"); \ - DEBUG_PRINT2 (" Before pop, next avail: %d\n", fail_stack.avail); \ - DEBUG_PRINT2 (" size: %d\n", fail_stack.size); \ - \ - assert (fail_stack.avail >= NUM_NONREG_ITEMS); \ - \ - DEBUG_POP (&failure_id); \ - DEBUG_PRINT2 (" Popping failure id: %u\n", failure_id); \ - \ - /* If the saved string location is NULL, it came from an \ - on_failure_keep_string_jump opcode, and we want to throw away the \ - saved NULL, thus retaining our current position in the string. */ \ - string_temp = POP_FAILURE_POINTER (); \ - if (string_temp != NULL) \ - str = (const CHAR_T *) string_temp; \ - \ - DEBUG_PRINT2 (" Popping string %p: `", str); \ - DEBUG_PRINT_DOUBLE_STRING (str, string1, size1, string2, size2); \ - DEBUG_PRINT1 ("'\n"); \ - \ - pat = (UCHAR_T *) POP_FAILURE_POINTER (); \ - DEBUG_PRINT2 (" Popping pattern %p:\n", pat); \ - DEBUG_PRINT_COMPILED_PATTERN (bufp, pat, pend); \ - \ - /* Restore register info. */ \ - high_reg = (active_reg_t) POP_FAILURE_INT (); \ - DEBUG_PRINT2 (" Popping high active reg: %ld\n", high_reg); \ - \ - low_reg = (active_reg_t) POP_FAILURE_INT (); \ - DEBUG_PRINT2 (" Popping low active reg: %ld\n", low_reg); \ - \ - if (1) \ - for (this_reg = high_reg; this_reg >= low_reg; this_reg--) \ - { \ - DEBUG_PRINT2 (" Popping reg: %ld\n", this_reg); \ - \ - reg_info[this_reg].word = POP_FAILURE_ELT (); \ - DEBUG_PRINT2 (" info: %p\n", \ - reg_info[this_reg].word.pointer); \ - \ - regend[this_reg] = (const CHAR_T *) POP_FAILURE_POINTER (); \ - DEBUG_PRINT2 (" end: %p\n", regend[this_reg]); \ - \ - regstart[this_reg] = (const CHAR_T *) POP_FAILURE_POINTER (); \ - DEBUG_PRINT2 (" start: %p\n", regstart[this_reg]); \ - } \ - else \ - { \ - for (this_reg = highest_active_reg; this_reg > high_reg; this_reg--) \ - { \ - reg_info[this_reg].word.integer = 0; \ - regend[this_reg] = 0; \ - regstart[this_reg] = 0; \ - } \ - highest_active_reg = high_reg; \ - } \ - \ - set_regs_matched_done = 0; \ - DEBUG_STATEMENT (nfailure_points_popped++); \ -} /* POP_FAILURE_POINT */ - -/* Structure for per-register (a.k.a. per-group) information. - Other register information, such as the - starting and ending positions (which are addresses), and the list of - inner groups (which is a bits list) are maintained in separate - variables. - - We are making a (strictly speaking) nonportable assumption here: that - the compiler will pack our bit fields into something that fits into - the type of `word', i.e., is something that fits into one item on the - failure stack. */ - - -/* Declarations and macros for re_match_2. */ - -typedef union -{ - PREFIX(fail_stack_elt_t) word; - struct - { - /* This field is one if this group can match the empty string, - zero if not. If not yet determined, `MATCH_NULL_UNSET_VALUE'. */ -# define MATCH_NULL_UNSET_VALUE 3 - unsigned match_null_string_p : 2; - unsigned is_active : 1; - unsigned matched_something : 1; - unsigned ever_matched_something : 1; - } bits; -} PREFIX(register_info_type); - -# ifndef DEFINED_ONCE -# define REG_MATCH_NULL_STRING_P(R) ((R).bits.match_null_string_p) -# define IS_ACTIVE(R) ((R).bits.is_active) -# define MATCHED_SOMETHING(R) ((R).bits.matched_something) -# define EVER_MATCHED_SOMETHING(R) ((R).bits.ever_matched_something) - - -/* Call this when have matched a real character; it sets `matched' flags - for the subexpressions which we are currently inside. Also records - that those subexprs have matched. */ -# define SET_REGS_MATCHED() \ - do \ - { \ - if (!set_regs_matched_done) \ - { \ - active_reg_t r; \ - set_regs_matched_done = 1; \ - for (r = lowest_active_reg; r <= highest_active_reg; r++) \ - { \ - MATCHED_SOMETHING (reg_info[r]) \ - = EVER_MATCHED_SOMETHING (reg_info[r]) \ - = 1; \ - } \ - } \ - } \ - while (0) -# endif /* not DEFINED_ONCE */ - -/* Registers are set to a sentinel when they haven't yet matched. */ -static CHAR_T PREFIX(reg_unset_dummy); -# define REG_UNSET_VALUE (&PREFIX(reg_unset_dummy)) -# define REG_UNSET(e) ((e) == REG_UNSET_VALUE) - -/* Subroutine declarations and macros for regex_compile. */ -static void PREFIX(store_op1) _RE_ARGS ((re_opcode_t op, UCHAR_T *loc, int arg)); -static void PREFIX(store_op2) _RE_ARGS ((re_opcode_t op, UCHAR_T *loc, - int arg1, int arg2)); -static void PREFIX(insert_op1) _RE_ARGS ((re_opcode_t op, UCHAR_T *loc, - int arg, UCHAR_T *end)); -static void PREFIX(insert_op2) _RE_ARGS ((re_opcode_t op, UCHAR_T *loc, - int arg1, int arg2, UCHAR_T *end)); -static boolean PREFIX(at_begline_loc_p) _RE_ARGS ((const CHAR_T *pattern, - const CHAR_T *p, - reg_syntax_t syntax)); -static boolean PREFIX(at_endline_loc_p) _RE_ARGS ((const CHAR_T *p, - const CHAR_T *pend, - reg_syntax_t syntax)); -# ifdef WCHAR -static reg_errcode_t wcs_compile_range _RE_ARGS ((CHAR_T range_start, - const CHAR_T **p_ptr, - const CHAR_T *pend, - char *translate, - reg_syntax_t syntax, - UCHAR_T *b, - CHAR_T *char_set)); -static void insert_space _RE_ARGS ((int num, CHAR_T *loc, CHAR_T *end)); -# else /* BYTE */ -static reg_errcode_t byte_compile_range _RE_ARGS ((unsigned int range_start, - const char **p_ptr, - const char *pend, - char *translate, - reg_syntax_t syntax, - unsigned char *b)); -# endif /* WCHAR */ - -/* Fetch the next character in the uncompiled pattern---translating it - if necessary. Also cast from a signed character in the constant - string passed to us by the user to an unsigned char that we can use - as an array index (in, e.g., `translate'). */ -/* ifdef MBS_SUPPORT, we translate only if character <= 0xff, - because it is impossible to allocate 4GB array for some encodings - which have 4 byte character_set like UCS4. */ -# ifndef PATFETCH -# ifdef WCHAR -# define PATFETCH(c) \ - do {if (p == pend) return REG_EEND; \ - c = (UCHAR_T) *p++; \ - if (translate && (c <= 0xff)) c = (UCHAR_T) translate[c]; \ - } while (0) -# else /* BYTE */ -# define PATFETCH(c) \ - do {if (p == pend) return REG_EEND; \ - c = (unsigned char) *p++; \ - if (translate) c = (unsigned char) translate[c]; \ - } while (0) -# endif /* WCHAR */ -# endif - -/* Fetch the next character in the uncompiled pattern, with no - translation. */ -# define PATFETCH_RAW(c) \ - do {if (p == pend) return REG_EEND; \ - c = (UCHAR_T) *p++; \ - } while (0) - -/* Go backwards one character in the pattern. */ -# define PATUNFETCH p-- - - -/* If `translate' is non-null, return translate[D], else just D. We - cast the subscript to translate because some data is declared as - `char *', to avoid warnings when a string constant is passed. But - when we use a character as a subscript we must make it unsigned. */ -/* ifdef MBS_SUPPORT, we translate only if character <= 0xff, - because it is impossible to allocate 4GB array for some encodings - which have 4 byte character_set like UCS4. */ - -# ifndef TRANSLATE -# ifdef WCHAR -# define TRANSLATE(d) \ - ((translate && ((UCHAR_T) (d)) <= 0xff) \ - ? (char) translate[(unsigned char) (d)] : (d)) -# else /* BYTE */ -# define TRANSLATE(d) \ - (translate ? (char) translate[(unsigned char) (d)] : (d)) -# endif /* WCHAR */ -# endif - - -/* Macros for outputting the compiled pattern into `buffer'. */ - -/* If the buffer isn't allocated when it comes in, use this. */ -# define INIT_BUF_SIZE (32 * sizeof(UCHAR_T)) - -/* Make sure we have at least N more bytes of space in buffer. */ -# ifdef WCHAR -# define GET_BUFFER_SPACE(n) \ - while (((unsigned long)b - (unsigned long)COMPILED_BUFFER_VAR \ - + (n)*sizeof(CHAR_T)) > bufp->allocated) \ - EXTEND_BUFFER () -# else /* BYTE */ -# define GET_BUFFER_SPACE(n) \ - while ((unsigned long) (b - bufp->buffer + (n)) > bufp->allocated) \ - EXTEND_BUFFER () -# endif /* WCHAR */ - -/* Make sure we have one more byte of buffer space and then add C to it. */ -# define BUF_PUSH(c) \ - do { \ - GET_BUFFER_SPACE (1); \ - *b++ = (UCHAR_T) (c); \ - } while (0) - - -/* Ensure we have two more bytes of buffer space and then append C1 and C2. */ -# define BUF_PUSH_2(c1, c2) \ - do { \ - GET_BUFFER_SPACE (2); \ - *b++ = (UCHAR_T) (c1); \ - *b++ = (UCHAR_T) (c2); \ - } while (0) - - -/* As with BUF_PUSH_2, except for three bytes. */ -# define BUF_PUSH_3(c1, c2, c3) \ - do { \ - GET_BUFFER_SPACE (3); \ - *b++ = (UCHAR_T) (c1); \ - *b++ = (UCHAR_T) (c2); \ - *b++ = (UCHAR_T) (c3); \ - } while (0) - -/* Store a jump with opcode OP at LOC to location TO. We store a - relative address offset by the three bytes the jump itself occupies. */ -# define STORE_JUMP(op, loc, to) \ - PREFIX(store_op1) (op, loc, (int) ((to) - (loc) - (1 + OFFSET_ADDRESS_SIZE))) - -/* Likewise, for a two-argument jump. */ -# define STORE_JUMP2(op, loc, to, arg) \ - PREFIX(store_op2) (op, loc, (int) ((to) - (loc) - (1 + OFFSET_ADDRESS_SIZE)), arg) - -/* Like `STORE_JUMP', but for inserting. Assume `b' is the buffer end. */ -# define INSERT_JUMP(op, loc, to) \ - PREFIX(insert_op1) (op, loc, (int) ((to) - (loc) - (1 + OFFSET_ADDRESS_SIZE)), b) - -/* Like `STORE_JUMP2', but for inserting. Assume `b' is the buffer end. */ -# define INSERT_JUMP2(op, loc, to, arg) \ - PREFIX(insert_op2) (op, loc, (int) ((to) - (loc) - (1 + OFFSET_ADDRESS_SIZE)),\ - arg, b) - -/* This is not an arbitrary limit: the arguments which represent offsets - into the pattern are two bytes long. So if 2^16 bytes turns out to - be too small, many things would have to change. */ -/* Any other compiler which, like MSC, has allocation limit below 2^16 - bytes will have to use approach similar to what was done below for - MSC and drop MAX_BUF_SIZE a bit. Otherwise you may end up - reallocating to 0 bytes. Such thing is not going to work too well. - You have been warned!! */ -# ifndef DEFINED_ONCE -# if defined _MSC_VER && !defined WIN32 -/* Microsoft C 16-bit versions limit malloc to approx 65512 bytes. - The REALLOC define eliminates a flurry of conversion warnings, - but is not required. */ -# define MAX_BUF_SIZE 65500L -# define REALLOC(p,s) realloc ((p), (size_t) (s)) -# else -# define MAX_BUF_SIZE (1L << 16) -# define REALLOC(p,s) realloc ((p), (s)) -# endif - -/* Extend the buffer by twice its current size via realloc and - reset the pointers that pointed into the old block to point to the - correct places in the new one. If extending the buffer results in it - being larger than MAX_BUF_SIZE, then flag memory exhausted. */ -# if __BOUNDED_POINTERS__ -# define SET_HIGH_BOUND(P) (__ptrhigh (P) = __ptrlow (P) + bufp->allocated) -# define MOVE_BUFFER_POINTER(P) \ - (__ptrlow (P) += incr, SET_HIGH_BOUND (P), __ptrvalue (P) += incr) -# define ELSE_EXTEND_BUFFER_HIGH_BOUND \ - else \ - { \ - SET_HIGH_BOUND (b); \ - SET_HIGH_BOUND (begalt); \ - if (fixup_alt_jump) \ - SET_HIGH_BOUND (fixup_alt_jump); \ - if (laststart) \ - SET_HIGH_BOUND (laststart); \ - if (pending_exact) \ - SET_HIGH_BOUND (pending_exact); \ - } -# else -# define MOVE_BUFFER_POINTER(P) (P) += incr -# define ELSE_EXTEND_BUFFER_HIGH_BOUND -# endif -# endif /* not DEFINED_ONCE */ - -# ifdef WCHAR -# define EXTEND_BUFFER() \ - do { \ - UCHAR_T *old_buffer = COMPILED_BUFFER_VAR; \ - int wchar_count; \ - if (bufp->allocated + sizeof(UCHAR_T) > MAX_BUF_SIZE) \ - return REG_ESIZE; \ - bufp->allocated <<= 1; \ - if (bufp->allocated > MAX_BUF_SIZE) \ - bufp->allocated = MAX_BUF_SIZE; \ - /* How many characters the new buffer can have? */ \ - wchar_count = bufp->allocated / sizeof(UCHAR_T); \ - if (wchar_count == 0) wchar_count = 1; \ - /* Truncate the buffer to CHAR_T align. */ \ - bufp->allocated = wchar_count * sizeof(UCHAR_T); \ - RETALLOC (COMPILED_BUFFER_VAR, wchar_count, UCHAR_T); \ - bufp->buffer = (char*)COMPILED_BUFFER_VAR; \ - if (COMPILED_BUFFER_VAR == NULL) \ - return REG_ESPACE; \ - /* If the buffer moved, move all the pointers into it. */ \ - if (old_buffer != COMPILED_BUFFER_VAR) \ - { \ - int incr = COMPILED_BUFFER_VAR - old_buffer; \ - MOVE_BUFFER_POINTER (b); \ - MOVE_BUFFER_POINTER (begalt); \ - if (fixup_alt_jump) \ - MOVE_BUFFER_POINTER (fixup_alt_jump); \ - if (laststart) \ - MOVE_BUFFER_POINTER (laststart); \ - if (pending_exact) \ - MOVE_BUFFER_POINTER (pending_exact); \ - } \ - ELSE_EXTEND_BUFFER_HIGH_BOUND \ - } while (0) -# else /* BYTE */ -# define EXTEND_BUFFER() \ - do { \ - UCHAR_T *old_buffer = COMPILED_BUFFER_VAR; \ - if (bufp->allocated == MAX_BUF_SIZE) \ - return REG_ESIZE; \ - bufp->allocated <<= 1; \ - if (bufp->allocated > MAX_BUF_SIZE) \ - bufp->allocated = MAX_BUF_SIZE; \ - bufp->buffer = (UCHAR_T *) REALLOC (COMPILED_BUFFER_VAR, \ - bufp->allocated); \ - if (COMPILED_BUFFER_VAR == NULL) \ - return REG_ESPACE; \ - /* If the buffer moved, move all the pointers into it. */ \ - if (old_buffer != COMPILED_BUFFER_VAR) \ - { \ - int incr = COMPILED_BUFFER_VAR - old_buffer; \ - MOVE_BUFFER_POINTER (b); \ - MOVE_BUFFER_POINTER (begalt); \ - if (fixup_alt_jump) \ - MOVE_BUFFER_POINTER (fixup_alt_jump); \ - if (laststart) \ - MOVE_BUFFER_POINTER (laststart); \ - if (pending_exact) \ - MOVE_BUFFER_POINTER (pending_exact); \ - } \ - ELSE_EXTEND_BUFFER_HIGH_BOUND \ - } while (0) -# endif /* WCHAR */ - -# ifndef DEFINED_ONCE -/* Since we have one byte reserved for the register number argument to - {start,stop}_memory, the maximum number of groups we can report - things about is what fits in that byte. */ -# define MAX_REGNUM 255 - -/* But patterns can have more than `MAX_REGNUM' registers. We just - ignore the excess. */ -typedef unsigned regnum_t; - - -/* Macros for the compile stack. */ - -/* Since offsets can go either forwards or backwards, this type needs to - be able to hold values from -(MAX_BUF_SIZE - 1) to MAX_BUF_SIZE - 1. */ -/* int may be not enough when sizeof(int) == 2. */ -typedef long pattern_offset_t; - -typedef struct -{ - pattern_offset_t begalt_offset; - pattern_offset_t fixup_alt_jump; - pattern_offset_t inner_group_offset; - pattern_offset_t laststart_offset; - regnum_t regnum; -} compile_stack_elt_t; - - -typedef struct -{ - compile_stack_elt_t *stack; - unsigned size; - unsigned avail; /* Offset of next open position. */ -} compile_stack_type; - - -# define INIT_COMPILE_STACK_SIZE 32 - -# define COMPILE_STACK_EMPTY (compile_stack.avail == 0) -# define COMPILE_STACK_FULL (compile_stack.avail == compile_stack.size) - -/* The next available element. */ -# define COMPILE_STACK_TOP (compile_stack.stack[compile_stack.avail]) - -# endif /* not DEFINED_ONCE */ - -/* Set the bit for character C in a list. */ -# ifndef DEFINED_ONCE -# define SET_LIST_BIT(c) \ - (b[((unsigned char) (c)) / BYTEWIDTH] \ - |= 1 << (((unsigned char) c) % BYTEWIDTH)) -# endif /* DEFINED_ONCE */ - -/* Get the next unsigned number in the uncompiled pattern. */ -# define GET_UNSIGNED_NUMBER(num) \ - { \ - while (p != pend) \ - { \ - PATFETCH (c); \ - if (c < '0' || c > '9') \ - break; \ - if (num <= RE_DUP_MAX) \ - { \ - if (num < 0) \ - num = 0; \ - num = num * 10 + c - '0'; \ - } \ - } \ - } - -# ifndef DEFINED_ONCE -# if defined _LIBC || WIDE_CHAR_SUPPORT -/* The GNU C library provides support for user-defined character classes - and the functions from ISO C amendement 1. */ -# ifdef CHARCLASS_NAME_MAX -# define CHAR_CLASS_MAX_LENGTH CHARCLASS_NAME_MAX -# else -/* This shouldn't happen but some implementation might still have this - problem. Use a reasonable default value. */ -# define CHAR_CLASS_MAX_LENGTH 256 -# endif - -# ifdef _LIBC -# define IS_CHAR_CLASS(string) __wctype (string) -# else -# define IS_CHAR_CLASS(string) wctype (string) -# endif -# else -# define CHAR_CLASS_MAX_LENGTH 6 /* Namely, `xdigit'. */ - -# define IS_CHAR_CLASS(string) \ - (STREQ (string, "alpha") || STREQ (string, "upper") \ - || STREQ (string, "lower") || STREQ (string, "digit") \ - || STREQ (string, "alnum") || STREQ (string, "xdigit") \ - || STREQ (string, "space") || STREQ (string, "print") \ - || STREQ (string, "punct") || STREQ (string, "graph") \ - || STREQ (string, "cntrl") || STREQ (string, "blank")) -# endif -# endif /* DEFINED_ONCE */ - -# ifndef MATCH_MAY_ALLOCATE - -/* If we cannot allocate large objects within re_match_2_internal, - we make the fail stack and register vectors global. - The fail stack, we grow to the maximum size when a regexp - is compiled. - The register vectors, we adjust in size each time we - compile a regexp, according to the number of registers it needs. */ - -static PREFIX(fail_stack_type) fail_stack; - -/* Size with which the following vectors are currently allocated. - That is so we can make them bigger as needed, - but never make them smaller. */ -# ifdef DEFINED_ONCE -static int regs_allocated_size; - -static const char ** regstart, ** regend; -static const char ** old_regstart, ** old_regend; -static const char **best_regstart, **best_regend; -static const char **reg_dummy; -# endif /* DEFINED_ONCE */ - -static PREFIX(register_info_type) *PREFIX(reg_info); -static PREFIX(register_info_type) *PREFIX(reg_info_dummy); - -/* Make the register vectors big enough for NUM_REGS registers, - but don't make them smaller. */ - -static void -PREFIX(regex_grow_registers) (num_regs) - int num_regs; -{ - if (num_regs > regs_allocated_size) - { - RETALLOC_IF (regstart, num_regs, const char *); - RETALLOC_IF (regend, num_regs, const char *); - RETALLOC_IF (old_regstart, num_regs, const char *); - RETALLOC_IF (old_regend, num_regs, const char *); - RETALLOC_IF (best_regstart, num_regs, const char *); - RETALLOC_IF (best_regend, num_regs, const char *); - RETALLOC_IF (PREFIX(reg_info), num_regs, PREFIX(register_info_type)); - RETALLOC_IF (reg_dummy, num_regs, const char *); - RETALLOC_IF (PREFIX(reg_info_dummy), num_regs, PREFIX(register_info_type)); - - regs_allocated_size = num_regs; - } -} - -# endif /* not MATCH_MAY_ALLOCATE */ - -# ifndef DEFINED_ONCE -static boolean group_in_compile_stack _RE_ARGS ((compile_stack_type - compile_stack, - regnum_t regnum)); -# endif /* not DEFINED_ONCE */ - -/* `regex_compile' compiles PATTERN (of length SIZE) according to SYNTAX. - Returns one of error codes defined in `regex.h', or zero for success. - - Assumes the `allocated' (and perhaps `buffer') and `translate' - fields are set in BUFP on entry. - - If it succeeds, results are put in BUFP (if it returns an error, the - contents of BUFP are undefined): - `buffer' is the compiled pattern; - `syntax' is set to SYNTAX; - `used' is set to the length of the compiled pattern; - `fastmap_accurate' is zero; - `re_nsub' is the number of subexpressions in PATTERN; - `not_bol' and `not_eol' are zero; - - The `fastmap' and `newline_anchor' fields are neither - examined nor set. */ - -/* Return, freeing storage we allocated. */ -# ifdef WCHAR -# define FREE_STACK_RETURN(value) \ - return (free(pattern), free(mbs_offset), free(is_binary), free (compile_stack.stack), value) -# else -# define FREE_STACK_RETURN(value) \ - return (free (compile_stack.stack), value) -# endif /* WCHAR */ - -static reg_errcode_t -PREFIX(regex_compile) (ARG_PREFIX(pattern), ARG_PREFIX(size), syntax, bufp) - const char *ARG_PREFIX(pattern); - size_t ARG_PREFIX(size); - reg_syntax_t syntax; - struct re_pattern_buffer *bufp; -{ - /* We fetch characters from PATTERN here. Even though PATTERN is - `char *' (i.e., signed), we declare these variables as unsigned, so - they can be reliably used as array indices. */ - register UCHAR_T c, c1; - -#ifdef WCHAR - /* A temporary space to keep wchar_t pattern and compiled pattern. */ - CHAR_T *pattern, *COMPILED_BUFFER_VAR; - size_t size; - /* offset buffer for optimization. See convert_mbs_to_wc. */ - int *mbs_offset = NULL; - /* It hold whether each wchar_t is binary data or not. */ - char *is_binary = NULL; - /* A flag whether exactn is handling binary data or not. */ - char is_exactn_bin = FALSE; -#endif /* WCHAR */ - - /* A random temporary spot in PATTERN. */ - const CHAR_T *p1; - - /* Points to the end of the buffer, where we should append. */ - register UCHAR_T *b; - - /* Keeps track of unclosed groups. */ - compile_stack_type compile_stack; - - /* Points to the current (ending) position in the pattern. */ -#ifdef WCHAR - const CHAR_T *p; - const CHAR_T *pend; -#else /* BYTE */ - const CHAR_T *p = pattern; - const CHAR_T *pend = pattern + size; -#endif /* WCHAR */ - - /* How to translate the characters in the pattern. */ - RE_TRANSLATE_TYPE translate = bufp->translate; - - /* Address of the count-byte of the most recently inserted `exactn' - command. This makes it possible to tell if a new exact-match - character can be added to that command or if the character requires - a new `exactn' command. */ - UCHAR_T *pending_exact = 0; - - /* Address of start of the most recently finished expression. - This tells, e.g., postfix * where to find the start of its - operand. Reset at the beginning of groups and alternatives. */ - UCHAR_T *laststart = 0; - - /* Address of beginning of regexp, or inside of last group. */ - UCHAR_T *begalt; - - /* Address of the place where a forward jump should go to the end of - the containing expression. Each alternative of an `or' -- except the - last -- ends with a forward jump of this sort. */ - UCHAR_T *fixup_alt_jump = 0; - - /* Counts open-groups as they are encountered. Remembered for the - matching close-group on the compile stack, so the same register - number is put in the stop_memory as the start_memory. */ - regnum_t regnum = 0; - -#ifdef WCHAR - /* Initialize the wchar_t PATTERN and offset_buffer. */ - p = pend = pattern = TALLOC(csize + 1, CHAR_T); - mbs_offset = TALLOC(csize + 1, int); - is_binary = TALLOC(csize + 1, char); - if (pattern == NULL || mbs_offset == NULL || is_binary == NULL) - { - free(pattern); - free(mbs_offset); - free(is_binary); - return REG_ESPACE; - } - pattern[csize] = L'\0'; /* sentinel */ - size = convert_mbs_to_wcs(pattern, cpattern, csize, mbs_offset, is_binary); - pend = p + size; - if (size < 0) - { - free(pattern); - free(mbs_offset); - free(is_binary); - return REG_BADPAT; - } -#endif - -#ifdef DEBUG - DEBUG_PRINT1 ("\nCompiling pattern: "); - if (debug) - { - unsigned debug_count; - - for (debug_count = 0; debug_count < size; debug_count++) - PUT_CHAR (pattern[debug_count]); - putchar ('\n'); - } -#endif /* DEBUG */ - - /* Initialize the compile stack. */ - compile_stack.stack = TALLOC (INIT_COMPILE_STACK_SIZE, compile_stack_elt_t); - if (compile_stack.stack == NULL) - { -#ifdef WCHAR - free(pattern); - free(mbs_offset); - free(is_binary); -#endif - return REG_ESPACE; - } - - compile_stack.size = INIT_COMPILE_STACK_SIZE; - compile_stack.avail = 0; - - /* Initialize the pattern buffer. */ - bufp->syntax = syntax; - bufp->fastmap_accurate = 0; - bufp->not_bol = bufp->not_eol = 0; - - /* Set `used' to zero, so that if we return an error, the pattern - printer (for debugging) will think there's no pattern. We reset it - at the end. */ - bufp->used = 0; - - /* Always count groups, whether or not bufp->no_sub is set. */ - bufp->re_nsub = 0; - -#if !defined emacs && !defined SYNTAX_TABLE - /* Initialize the syntax table. */ - init_syntax_once (); -#endif - - if (bufp->allocated == 0) - { - if (bufp->buffer) - { /* If zero allocated, but buffer is non-null, try to realloc - enough space. This loses if buffer's address is bogus, but - that is the user's responsibility. */ -#ifdef WCHAR - /* Free bufp->buffer and allocate an array for wchar_t pattern - buffer. */ - free(bufp->buffer); - COMPILED_BUFFER_VAR = TALLOC (INIT_BUF_SIZE/sizeof(UCHAR_T), - UCHAR_T); -#else - RETALLOC (COMPILED_BUFFER_VAR, INIT_BUF_SIZE, UCHAR_T); -#endif /* WCHAR */ - } - else - { /* Caller did not allocate a buffer. Do it for them. */ - COMPILED_BUFFER_VAR = TALLOC (INIT_BUF_SIZE / sizeof(UCHAR_T), - UCHAR_T); - } - - if (!COMPILED_BUFFER_VAR) FREE_STACK_RETURN (REG_ESPACE); -#ifdef WCHAR - bufp->buffer = (char*)COMPILED_BUFFER_VAR; -#endif /* WCHAR */ - bufp->allocated = INIT_BUF_SIZE; - } -#ifdef WCHAR - else - COMPILED_BUFFER_VAR = (UCHAR_T*) bufp->buffer; -#endif - - begalt = b = COMPILED_BUFFER_VAR; - - /* Loop through the uncompiled pattern until we're at the end. */ - while (p != pend) - { - PATFETCH (c); - - switch (c) - { - case '^': - { - if ( /* If at start of pattern, it's an operator. */ - p == pattern + 1 - /* If context independent, it's an operator. */ - || syntax & RE_CONTEXT_INDEP_ANCHORS - /* Otherwise, depends on what's come before. */ - || PREFIX(at_begline_loc_p) (pattern, p, syntax)) - BUF_PUSH (begline); - else - goto normal_char; - } - break; - - - case '$': - { - if ( /* If at end of pattern, it's an operator. */ - p == pend - /* If context independent, it's an operator. */ - || syntax & RE_CONTEXT_INDEP_ANCHORS - /* Otherwise, depends on what's next. */ - || PREFIX(at_endline_loc_p) (p, pend, syntax)) - BUF_PUSH (endline); - else - goto normal_char; - } - break; - - - case '+': - case '?': - if ((syntax & RE_BK_PLUS_QM) - || (syntax & RE_LIMITED_OPS)) - goto normal_char; - handle_plus: - case '*': - /* If there is no previous pattern... */ - if (!laststart) - { - if (syntax & RE_CONTEXT_INVALID_OPS) - FREE_STACK_RETURN (REG_BADRPT); - else if (!(syntax & RE_CONTEXT_INDEP_OPS)) - goto normal_char; - } - - { - /* Are we optimizing this jump? */ - boolean keep_string_p = false; - - /* 1 means zero (many) matches is allowed. */ - char zero_times_ok = 0, many_times_ok = 0; - - /* If there is a sequence of repetition chars, collapse it - down to just one (the right one). We can't combine - interval operators with these because of, e.g., `a{2}*', - which should only match an even number of `a's. */ - - for (;;) - { - zero_times_ok |= c != '+'; - many_times_ok |= c != '?'; - - if (p == pend) - break; - - PATFETCH (c); - - if (c == '*' - || (!(syntax & RE_BK_PLUS_QM) && (c == '+' || c == '?'))) - ; - - else if (syntax & RE_BK_PLUS_QM && c == '\\') - { - if (p == pend) FREE_STACK_RETURN (REG_EESCAPE); - - PATFETCH (c1); - if (!(c1 == '+' || c1 == '?')) - { - PATUNFETCH; - PATUNFETCH; - break; - } - - c = c1; - } - else - { - PATUNFETCH; - break; - } - - /* If we get here, we found another repeat character. */ - } - - /* Star, etc. applied to an empty pattern is equivalent - to an empty pattern. */ - if (!laststart) - break; - - /* Now we know whether or not zero matches is allowed - and also whether or not two or more matches is allowed. */ - if (many_times_ok) - { /* More than one repetition is allowed, so put in at the - end a backward relative jump from `b' to before the next - jump we're going to put in below (which jumps from - laststart to after this jump). - - But if we are at the `*' in the exact sequence `.*\n', - insert an unconditional jump backwards to the ., - instead of the beginning of the loop. This way we only - push a failure point once, instead of every time - through the loop. */ - assert (p - 1 > pattern); - - /* Allocate the space for the jump. */ - GET_BUFFER_SPACE (1 + OFFSET_ADDRESS_SIZE); - - /* We know we are not at the first character of the pattern, - because laststart was nonzero. And we've already - incremented `p', by the way, to be the character after - the `*'. Do we have to do something analogous here - for null bytes, because of RE_DOT_NOT_NULL? */ - if (TRANSLATE (*(p - 2)) == TRANSLATE ('.') - && zero_times_ok - && p < pend && TRANSLATE (*p) == TRANSLATE ('\n') - && !(syntax & RE_DOT_NEWLINE)) - { /* We have .*\n. */ - STORE_JUMP (jump, b, laststart); - keep_string_p = true; - } - else - /* Anything else. */ - STORE_JUMP (maybe_pop_jump, b, laststart - - (1 + OFFSET_ADDRESS_SIZE)); - - /* We've added more stuff to the buffer. */ - b += 1 + OFFSET_ADDRESS_SIZE; - } - - /* On failure, jump from laststart to b + 3, which will be the - end of the buffer after this jump is inserted. */ - /* ifdef WCHAR, 'b + 1 + OFFSET_ADDRESS_SIZE' instead of - 'b + 3'. */ - GET_BUFFER_SPACE (1 + OFFSET_ADDRESS_SIZE); - INSERT_JUMP (keep_string_p ? on_failure_keep_string_jump - : on_failure_jump, - laststart, b + 1 + OFFSET_ADDRESS_SIZE); - pending_exact = 0; - b += 1 + OFFSET_ADDRESS_SIZE; - - if (!zero_times_ok) - { - /* At least one repetition is required, so insert a - `dummy_failure_jump' before the initial - `on_failure_jump' instruction of the loop. This - effects a skip over that instruction the first time - we hit that loop. */ - GET_BUFFER_SPACE (1 + OFFSET_ADDRESS_SIZE); - INSERT_JUMP (dummy_failure_jump, laststart, laststart + - 2 + 2 * OFFSET_ADDRESS_SIZE); - b += 1 + OFFSET_ADDRESS_SIZE; - } - } - break; - - - case '.': - laststart = b; - BUF_PUSH (anychar); - break; - - - case '[': - { - boolean had_char_class = false; -#ifdef WCHAR - CHAR_T range_start = 0xffffffff; -#else - unsigned int range_start = 0xffffffff; -#endif - if (p == pend) FREE_STACK_RETURN (REG_EBRACK); - -#ifdef WCHAR - /* We assume a charset(_not) structure as a wchar_t array. - charset[0] = (re_opcode_t) charset(_not) - charset[1] = l (= length of char_classes) - charset[2] = m (= length of collating_symbols) - charset[3] = n (= length of equivalence_classes) - charset[4] = o (= length of char_ranges) - charset[5] = p (= length of chars) - - charset[6] = char_class (wctype_t) - charset[6+CHAR_CLASS_SIZE] = char_class (wctype_t) - ... - charset[l+5] = char_class (wctype_t) - - charset[l+6] = collating_symbol (wchar_t) - ... - charset[l+m+5] = collating_symbol (wchar_t) - ifdef _LIBC we use the index if - _NL_COLLATE_SYMB_EXTRAMB instead of - wchar_t string. - - charset[l+m+6] = equivalence_classes (wchar_t) - ... - charset[l+m+n+5] = equivalence_classes (wchar_t) - ifdef _LIBC we use the index in - _NL_COLLATE_WEIGHT instead of - wchar_t string. - - charset[l+m+n+6] = range_start - charset[l+m+n+7] = range_end - ... - charset[l+m+n+2o+4] = range_start - charset[l+m+n+2o+5] = range_end - ifdef _LIBC we use the value looked up - in _NL_COLLATE_COLLSEQ instead of - wchar_t character. - - charset[l+m+n+2o+6] = char - ... - charset[l+m+n+2o+p+5] = char - - */ - - /* We need at least 6 spaces: the opcode, the length of - char_classes, the length of collating_symbols, the length of - equivalence_classes, the length of char_ranges, the length of - chars. */ - GET_BUFFER_SPACE (6); - - /* Save b as laststart. And We use laststart as the pointer - to the first element of the charset here. - In other words, laststart[i] indicates charset[i]. */ - laststart = b; - - /* We test `*p == '^' twice, instead of using an if - statement, so we only need one BUF_PUSH. */ - BUF_PUSH (*p == '^' ? charset_not : charset); - if (*p == '^') - p++; - - /* Push the length of char_classes, the length of - collating_symbols, the length of equivalence_classes, the - length of char_ranges and the length of chars. */ - BUF_PUSH_3 (0, 0, 0); - BUF_PUSH_2 (0, 0); - - /* Remember the first position in the bracket expression. */ - p1 = p; - - /* charset_not matches newline according to a syntax bit. */ - if ((re_opcode_t) b[-6] == charset_not - && (syntax & RE_HAT_LISTS_NOT_NEWLINE)) - { - BUF_PUSH('\n'); - laststart[5]++; /* Update the length of characters */ - } - - /* Read in characters and ranges, setting map bits. */ - for (;;) - { - if (p == pend) FREE_STACK_RETURN (REG_EBRACK); - - PATFETCH (c); - - /* \ might escape characters inside [...] and [^...]. */ - if ((syntax & RE_BACKSLASH_ESCAPE_IN_LISTS) && c == '\\') - { - if (p == pend) FREE_STACK_RETURN (REG_EESCAPE); - - PATFETCH (c1); - BUF_PUSH(c1); - laststart[5]++; /* Update the length of chars */ - range_start = c1; - continue; - } - - /* Could be the end of the bracket expression. If it's - not (i.e., when the bracket expression is `[]' so - far), the ']' character bit gets set way below. */ - if (c == ']' && p != p1 + 1) - break; - - /* Look ahead to see if it's a range when the last thing - was a character class. */ - if (had_char_class && c == '-' && *p != ']') - FREE_STACK_RETURN (REG_ERANGE); - - /* Look ahead to see if it's a range when the last thing - was a character: if this is a hyphen not at the - beginning or the end of a list, then it's the range - operator. */ - if (c == '-' - && !(p - 2 >= pattern && p[-2] == '[') - && !(p - 3 >= pattern && p[-3] == '[' && p[-2] == '^') - && *p != ']') - { - reg_errcode_t ret; - /* Allocate the space for range_start and range_end. */ - GET_BUFFER_SPACE (2); - /* Update the pointer to indicate end of buffer. */ - b += 2; - ret = wcs_compile_range (range_start, &p, pend, translate, - syntax, b, laststart); - if (ret != REG_NOERROR) FREE_STACK_RETURN (ret); - range_start = 0xffffffff; - } - else if (p[0] == '-' && p[1] != ']') - { /* This handles ranges made up of characters only. */ - reg_errcode_t ret; - - /* Move past the `-'. */ - PATFETCH (c1); - /* Allocate the space for range_start and range_end. */ - GET_BUFFER_SPACE (2); - /* Update the pointer to indicate end of buffer. */ - b += 2; - ret = wcs_compile_range (c, &p, pend, translate, syntax, b, - laststart); - if (ret != REG_NOERROR) FREE_STACK_RETURN (ret); - range_start = 0xffffffff; - } - - /* See if we're at the beginning of a possible character - class. */ - else if (syntax & RE_CHAR_CLASSES && c == '[' && *p == ':') - { /* Leave room for the null. */ - char str[CHAR_CLASS_MAX_LENGTH + 1]; - - PATFETCH (c); - c1 = 0; - - /* If pattern is `[[:'. */ - if (p == pend) FREE_STACK_RETURN (REG_EBRACK); - - for (;;) - { - PATFETCH (c); - if ((c == ':' && *p == ']') || p == pend) - break; - if (c1 < CHAR_CLASS_MAX_LENGTH) - str[c1++] = c; - else - /* This is in any case an invalid class name. */ - str[0] = '\0'; - } - str[c1] = '\0'; - - /* If isn't a word bracketed by `[:' and `:]': - undo the ending character, the letters, and leave - the leading `:' and `[' (but store them as character). */ - if (c == ':' && *p == ']') - { - wctype_t wt; - uintptr_t alignedp; - - /* Query the character class as wctype_t. */ - wt = IS_CHAR_CLASS (str); - if (wt == 0) - FREE_STACK_RETURN (REG_ECTYPE); - - /* Throw away the ] at the end of the character - class. */ - PATFETCH (c); - - if (p == pend) FREE_STACK_RETURN (REG_EBRACK); - - /* Allocate the space for character class. */ - GET_BUFFER_SPACE(CHAR_CLASS_SIZE); - /* Update the pointer to indicate end of buffer. */ - b += CHAR_CLASS_SIZE; - /* Move data which follow character classes - not to violate the data. */ - insert_space(CHAR_CLASS_SIZE, - laststart + 6 + laststart[1], - b - 1); - alignedp = ((uintptr_t)(laststart + 6 + laststart[1]) - + __alignof__(wctype_t) - 1) - & ~(uintptr_t)(__alignof__(wctype_t) - 1); - /* Store the character class. */ - *((wctype_t*)alignedp) = wt; - /* Update length of char_classes */ - laststart[1] += CHAR_CLASS_SIZE; - - had_char_class = true; - } - else - { - c1++; - while (c1--) - PATUNFETCH; - BUF_PUSH ('['); - BUF_PUSH (':'); - laststart[5] += 2; /* Update the length of characters */ - range_start = ':'; - had_char_class = false; - } - } - else if (syntax & RE_CHAR_CLASSES && c == '[' && (*p == '=' - || *p == '.')) - { - CHAR_T str[128]; /* Should be large enough. */ - CHAR_T delim = *p; /* '=' or '.' */ -# ifdef _LIBC - uint32_t nrules = - _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES); -# endif - PATFETCH (c); - c1 = 0; - - /* If pattern is `[[=' or '[[.'. */ - if (p == pend) FREE_STACK_RETURN (REG_EBRACK); - - for (;;) - { - PATFETCH (c); - if ((c == delim && *p == ']') || p == pend) - break; - if (c1 < sizeof (str) - 1) - str[c1++] = c; - else - /* This is in any case an invalid class name. */ - str[0] = '\0'; - } - str[c1] = '\0'; - - if (c == delim && *p == ']' && str[0] != '\0') - { - unsigned int i, offset; - /* If we have no collation data we use the default - collation in which each character is in a class - by itself. It also means that ASCII is the - character set and therefore we cannot have character - with more than one byte in the multibyte - representation. */ - - /* If not defined _LIBC, we push the name and - `\0' for the sake of matching performance. */ - int datasize = c1 + 1; - -# ifdef _LIBC - int32_t idx = 0; - if (nrules == 0) -# endif - { - if (c1 != 1) - FREE_STACK_RETURN (REG_ECOLLATE); - } -# ifdef _LIBC - else - { - const int32_t *table; - const int32_t *weights; - const int32_t *extra; - const int32_t *indirect; - wint_t *cp; - - /* This #include defines a local function! */ -# include - - if(delim == '=') - { - /* We push the index for equivalence class. */ - cp = (wint_t*)str; - - table = (const int32_t *) - _NL_CURRENT (LC_COLLATE, - _NL_COLLATE_TABLEWC); - weights = (const int32_t *) - _NL_CURRENT (LC_COLLATE, - _NL_COLLATE_WEIGHTWC); - extra = (const int32_t *) - _NL_CURRENT (LC_COLLATE, - _NL_COLLATE_EXTRAWC); - indirect = (const int32_t *) - _NL_CURRENT (LC_COLLATE, - _NL_COLLATE_INDIRECTWC); - - idx = findidx ((const wint_t**)&cp); - if (idx == 0 || cp < (wint_t*) str + c1) - /* This is no valid character. */ - FREE_STACK_RETURN (REG_ECOLLATE); - - str[0] = (wchar_t)idx; - } - else /* delim == '.' */ - { - /* We push collation sequence value - for collating symbol. */ - int32_t table_size; - const int32_t *symb_table; - const unsigned char *extra; - int32_t idx; - int32_t elem; - int32_t second; - int32_t hash; - char char_str[c1]; - - /* We have to convert the name to a single-byte - string. This is possible since the names - consist of ASCII characters and the internal - representation is UCS4. */ - for (i = 0; i < c1; ++i) - char_str[i] = str[i]; - - table_size = - _NL_CURRENT_WORD (LC_COLLATE, - _NL_COLLATE_SYMB_HASH_SIZEMB); - symb_table = (const int32_t *) - _NL_CURRENT (LC_COLLATE, - _NL_COLLATE_SYMB_TABLEMB); - extra = (const unsigned char *) - _NL_CURRENT (LC_COLLATE, - _NL_COLLATE_SYMB_EXTRAMB); - - /* Locate the character in the hashing table. */ - hash = elem_hash (char_str, c1); - - idx = 0; - elem = hash % table_size; - second = hash % (table_size - 2); - while (symb_table[2 * elem] != 0) - { - /* First compare the hashing value. */ - if (symb_table[2 * elem] == hash - && c1 == extra[symb_table[2 * elem + 1]] - && memcmp (char_str, - &extra[symb_table[2 * elem + 1] - + 1], c1) == 0) - { - /* Yep, this is the entry. */ - idx = symb_table[2 * elem + 1]; - idx += 1 + extra[idx]; - break; - } - - /* Next entry. */ - elem += second; - } - - if (symb_table[2 * elem] != 0) - { - /* Compute the index of the byte sequence - in the table. */ - idx += 1 + extra[idx]; - /* Adjust for the alignment. */ - idx = (idx + 3) & ~3; - - str[0] = (wchar_t) idx + 4; - } - else if (symb_table[2 * elem] == 0 && c1 == 1) - { - /* No valid character. Match it as a - single byte character. */ - had_char_class = false; - BUF_PUSH(str[0]); - /* Update the length of characters */ - laststart[5]++; - range_start = str[0]; - - /* Throw away the ] at the end of the - collating symbol. */ - PATFETCH (c); - /* exit from the switch block. */ - continue; - } - else - FREE_STACK_RETURN (REG_ECOLLATE); - } - datasize = 1; - } -# endif - /* Throw away the ] at the end of the equivalence - class (or collating symbol). */ - PATFETCH (c); - - /* Allocate the space for the equivalence class - (or collating symbol) (and '\0' if needed). */ - GET_BUFFER_SPACE(datasize); - /* Update the pointer to indicate end of buffer. */ - b += datasize; - - if (delim == '=') - { /* equivalence class */ - /* Calculate the offset of char_ranges, - which is next to equivalence_classes. */ - offset = laststart[1] + laststart[2] - + laststart[3] +6; - /* Insert space. */ - insert_space(datasize, laststart + offset, b - 1); - - /* Write the equivalence_class and \0. */ - for (i = 0 ; i < datasize ; i++) - laststart[offset + i] = str[i]; - - /* Update the length of equivalence_classes. */ - laststart[3] += datasize; - had_char_class = true; - } - else /* delim == '.' */ - { /* collating symbol */ - /* Calculate the offset of the equivalence_classes, - which is next to collating_symbols. */ - offset = laststart[1] + laststart[2] + 6; - /* Insert space and write the collationg_symbol - and \0. */ - insert_space(datasize, laststart + offset, b-1); - for (i = 0 ; i < datasize ; i++) - laststart[offset + i] = str[i]; - - /* In re_match_2_internal if range_start < -1, we - assume -range_start is the offset of the - collating symbol which is specified as - the character of the range start. So we assign - -(laststart[1] + laststart[2] + 6) to - range_start. */ - range_start = -(laststart[1] + laststart[2] + 6); - /* Update the length of collating_symbol. */ - laststart[2] += datasize; - had_char_class = false; - } - } - else - { - c1++; - while (c1--) - PATUNFETCH; - BUF_PUSH ('['); - BUF_PUSH (delim); - laststart[5] += 2; /* Update the length of characters */ - range_start = delim; - had_char_class = false; - } - } - else - { - had_char_class = false; - BUF_PUSH(c); - laststart[5]++; /* Update the length of characters */ - range_start = c; - } - } - -#else /* BYTE */ - /* Ensure that we have enough space to push a charset: the - opcode, the length count, and the bitset; 34 bytes in all. */ - GET_BUFFER_SPACE (34); - - laststart = b; - - /* We test `*p == '^' twice, instead of using an if - statement, so we only need one BUF_PUSH. */ - BUF_PUSH (*p == '^' ? charset_not : charset); - if (*p == '^') - p++; - - /* Remember the first position in the bracket expression. */ - p1 = p; - - /* Push the number of bytes in the bitmap. */ - BUF_PUSH ((1 << BYTEWIDTH) / BYTEWIDTH); - - /* Clear the whole map. */ - bzero (b, (1 << BYTEWIDTH) / BYTEWIDTH); - - /* charset_not matches newline according to a syntax bit. */ - if ((re_opcode_t) b[-2] == charset_not - && (syntax & RE_HAT_LISTS_NOT_NEWLINE)) - SET_LIST_BIT ('\n'); - - /* Read in characters and ranges, setting map bits. */ - for (;;) - { - if (p == pend) FREE_STACK_RETURN (REG_EBRACK); - - PATFETCH (c); - - /* \ might escape characters inside [...] and [^...]. */ - if ((syntax & RE_BACKSLASH_ESCAPE_IN_LISTS) && c == '\\') - { - if (p == pend) FREE_STACK_RETURN (REG_EESCAPE); - - PATFETCH (c1); - SET_LIST_BIT (c1); - range_start = c1; - continue; - } - - /* Could be the end of the bracket expression. If it's - not (i.e., when the bracket expression is `[]' so - far), the ']' character bit gets set way below. */ - if (c == ']' && p != p1 + 1) - break; - - /* Look ahead to see if it's a range when the last thing - was a character class. */ - if (had_char_class && c == '-' && *p != ']') - FREE_STACK_RETURN (REG_ERANGE); - - /* Look ahead to see if it's a range when the last thing - was a character: if this is a hyphen not at the - beginning or the end of a list, then it's the range - operator. */ - if (c == '-' - && !(p - 2 >= pattern && p[-2] == '[') - && !(p - 3 >= pattern && p[-3] == '[' && p[-2] == '^') - && *p != ']') - { - reg_errcode_t ret - = byte_compile_range (range_start, &p, pend, translate, - syntax, b); - if (ret != REG_NOERROR) FREE_STACK_RETURN (ret); - range_start = 0xffffffff; - } - - else if (p[0] == '-' && p[1] != ']') - { /* This handles ranges made up of characters only. */ - reg_errcode_t ret; - - /* Move past the `-'. */ - PATFETCH (c1); - - ret = byte_compile_range (c, &p, pend, translate, syntax, b); - if (ret != REG_NOERROR) FREE_STACK_RETURN (ret); - range_start = 0xffffffff; - } - - /* See if we're at the beginning of a possible character - class. */ - - else if (syntax & RE_CHAR_CLASSES && c == '[' && *p == ':') - { /* Leave room for the null. */ - char str[CHAR_CLASS_MAX_LENGTH + 1]; - - PATFETCH (c); - c1 = 0; - - /* If pattern is `[[:'. */ - if (p == pend) FREE_STACK_RETURN (REG_EBRACK); - - for (;;) - { - PATFETCH (c); - if ((c == ':' && *p == ']') || p == pend) - break; - if (c1 < CHAR_CLASS_MAX_LENGTH) - str[c1++] = c; - else - /* This is in any case an invalid class name. */ - str[0] = '\0'; - } - str[c1] = '\0'; - - /* If isn't a word bracketed by `[:' and `:]': - undo the ending character, the letters, and leave - the leading `:' and `[' (but set bits for them). */ - if (c == ':' && *p == ']') - { -# if defined _LIBC || WIDE_CHAR_SUPPORT - boolean is_lower = STREQ (str, "lower"); - boolean is_upper = STREQ (str, "upper"); - wctype_t wt; - int ch; - - wt = IS_CHAR_CLASS (str); - if (wt == 0) - FREE_STACK_RETURN (REG_ECTYPE); - - /* Throw away the ] at the end of the character - class. */ - PATFETCH (c); - - if (p == pend) FREE_STACK_RETURN (REG_EBRACK); - - for (ch = 0; ch < 1 << BYTEWIDTH; ++ch) - { -# ifdef _LIBC - if (__iswctype (__btowc (ch), wt)) - SET_LIST_BIT (ch); -# else - if (iswctype (btowc (ch), wt)) - SET_LIST_BIT (ch); -# endif - - if (translate && (is_upper || is_lower) - && (ISUPPER (ch) || ISLOWER (ch))) - SET_LIST_BIT (ch); - } - - had_char_class = true; -# else - int ch; - boolean is_alnum = STREQ (str, "alnum"); - boolean is_alpha = STREQ (str, "alpha"); - boolean is_blank = STREQ (str, "blank"); - boolean is_cntrl = STREQ (str, "cntrl"); - boolean is_digit = STREQ (str, "digit"); - boolean is_graph = STREQ (str, "graph"); - boolean is_lower = STREQ (str, "lower"); - boolean is_print = STREQ (str, "print"); - boolean is_punct = STREQ (str, "punct"); - boolean is_space = STREQ (str, "space"); - boolean is_upper = STREQ (str, "upper"); - boolean is_xdigit = STREQ (str, "xdigit"); - - if (!IS_CHAR_CLASS (str)) - FREE_STACK_RETURN (REG_ECTYPE); - - /* Throw away the ] at the end of the character - class. */ - PATFETCH (c); - - if (p == pend) FREE_STACK_RETURN (REG_EBRACK); - - for (ch = 0; ch < 1 << BYTEWIDTH; ch++) - { - /* This was split into 3 if's to - avoid an arbitrary limit in some compiler. */ - if ( (is_alnum && ISALNUM (ch)) - || (is_alpha && ISALPHA (ch)) - || (is_blank && ISBLANK (ch)) - || (is_cntrl && ISCNTRL (ch))) - SET_LIST_BIT (ch); - if ( (is_digit && ISDIGIT (ch)) - || (is_graph && ISGRAPH (ch)) - || (is_lower && ISLOWER (ch)) - || (is_print && ISPRINT (ch))) - SET_LIST_BIT (ch); - if ( (is_punct && ISPUNCT (ch)) - || (is_space && ISSPACE (ch)) - || (is_upper && ISUPPER (ch)) - || (is_xdigit && ISXDIGIT (ch))) - SET_LIST_BIT (ch); - if ( translate && (is_upper || is_lower) - && (ISUPPER (ch) || ISLOWER (ch))) - SET_LIST_BIT (ch); - } - had_char_class = true; -# endif /* libc || wctype.h */ - } - else - { - c1++; - while (c1--) - PATUNFETCH; - SET_LIST_BIT ('['); - SET_LIST_BIT (':'); - range_start = ':'; - had_char_class = false; - } - } - else if (syntax & RE_CHAR_CLASSES && c == '[' && *p == '=') - { - unsigned char str[MB_LEN_MAX + 1]; -# ifdef _LIBC - uint32_t nrules = - _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES); -# endif - - PATFETCH (c); - c1 = 0; - - /* If pattern is `[[='. */ - if (p == pend) FREE_STACK_RETURN (REG_EBRACK); - - for (;;) - { - PATFETCH (c); - if ((c == '=' && *p == ']') || p == pend) - break; - if (c1 < MB_LEN_MAX) - str[c1++] = c; - else - /* This is in any case an invalid class name. */ - str[0] = '\0'; - } - str[c1] = '\0'; - - if (c == '=' && *p == ']' && str[0] != '\0') - { - /* If we have no collation data we use the default - collation in which each character is in a class - by itself. It also means that ASCII is the - character set and therefore we cannot have character - with more than one byte in the multibyte - representation. */ -# ifdef _LIBC - if (nrules == 0) -# endif - { - if (c1 != 1) - FREE_STACK_RETURN (REG_ECOLLATE); - - /* Throw away the ] at the end of the equivalence - class. */ - PATFETCH (c); - - /* Set the bit for the character. */ - SET_LIST_BIT (str[0]); - } -# ifdef _LIBC - else - { - /* Try to match the byte sequence in `str' against - those known to the collate implementation. - First find out whether the bytes in `str' are - actually from exactly one character. */ - const int32_t *table; - const unsigned char *weights; - const unsigned char *extra; - const int32_t *indirect; - int32_t idx; - const unsigned char *cp = str; - int ch; - - /* This #include defines a local function! */ -# include - - table = (const int32_t *) - _NL_CURRENT (LC_COLLATE, _NL_COLLATE_TABLEMB); - weights = (const unsigned char *) - _NL_CURRENT (LC_COLLATE, _NL_COLLATE_WEIGHTMB); - extra = (const unsigned char *) - _NL_CURRENT (LC_COLLATE, _NL_COLLATE_EXTRAMB); - indirect = (const int32_t *) - _NL_CURRENT (LC_COLLATE, _NL_COLLATE_INDIRECTMB); - - idx = findidx (&cp); - if (idx == 0 || cp < str + c1) - /* This is no valid character. */ - FREE_STACK_RETURN (REG_ECOLLATE); - - /* Throw away the ] at the end of the equivalence - class. */ - PATFETCH (c); - - /* Now we have to go throught the whole table - and find all characters which have the same - first level weight. - - XXX Note that this is not entirely correct. - we would have to match multibyte sequences - but this is not possible with the current - implementation. */ - for (ch = 1; ch < 256; ++ch) - /* XXX This test would have to be changed if we - would allow matching multibyte sequences. */ - if (table[ch] > 0) - { - int32_t idx2 = table[ch]; - size_t len = weights[idx2]; - - /* Test whether the lenghts match. */ - if (weights[idx] == len) - { - /* They do. New compare the bytes of - the weight. */ - size_t cnt = 0; - - while (cnt < len - && (weights[idx + 1 + cnt] - == weights[idx2 + 1 + cnt])) - ++cnt; - - if (cnt == len) - /* They match. Mark the character as - acceptable. */ - SET_LIST_BIT (ch); - } - } - } -# endif - had_char_class = true; - } - else - { - c1++; - while (c1--) - PATUNFETCH; - SET_LIST_BIT ('['); - SET_LIST_BIT ('='); - range_start = '='; - had_char_class = false; - } - } - else if (syntax & RE_CHAR_CLASSES && c == '[' && *p == '.') - { - unsigned char str[128]; /* Should be large enough. */ -# ifdef _LIBC - uint32_t nrules = - _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES); -# endif - - PATFETCH (c); - c1 = 0; - - /* If pattern is `[[.'. */ - if (p == pend) FREE_STACK_RETURN (REG_EBRACK); - - for (;;) - { - PATFETCH (c); - if ((c == '.' && *p == ']') || p == pend) - break; - if (c1 < sizeof (str)) - str[c1++] = c; - else - /* This is in any case an invalid class name. */ - str[0] = '\0'; - } - str[c1] = '\0'; - - if (c == '.' && *p == ']' && str[0] != '\0') - { - /* If we have no collation data we use the default - collation in which each character is the name - for its own class which contains only the one - character. It also means that ASCII is the - character set and therefore we cannot have character - with more than one byte in the multibyte - representation. */ -# ifdef _LIBC - if (nrules == 0) -# endif - { - if (c1 != 1) - FREE_STACK_RETURN (REG_ECOLLATE); - - /* Throw away the ] at the end of the equivalence - class. */ - PATFETCH (c); - - /* Set the bit for the character. */ - SET_LIST_BIT (str[0]); - range_start = ((const unsigned char *) str)[0]; - } -# ifdef _LIBC - else - { - /* Try to match the byte sequence in `str' against - those known to the collate implementation. - First find out whether the bytes in `str' are - actually from exactly one character. */ - int32_t table_size; - const int32_t *symb_table; - const unsigned char *extra; - int32_t idx; - int32_t elem; - int32_t second; - int32_t hash; - - table_size = - _NL_CURRENT_WORD (LC_COLLATE, - _NL_COLLATE_SYMB_HASH_SIZEMB); - symb_table = (const int32_t *) - _NL_CURRENT (LC_COLLATE, - _NL_COLLATE_SYMB_TABLEMB); - extra = (const unsigned char *) - _NL_CURRENT (LC_COLLATE, - _NL_COLLATE_SYMB_EXTRAMB); - - /* Locate the character in the hashing table. */ - hash = elem_hash (str, c1); - - idx = 0; - elem = hash % table_size; - second = hash % (table_size - 2); - while (symb_table[2 * elem] != 0) - { - /* First compare the hashing value. */ - if (symb_table[2 * elem] == hash - && c1 == extra[symb_table[2 * elem + 1]] - && memcmp (str, - &extra[symb_table[2 * elem + 1] - + 1], - c1) == 0) - { - /* Yep, this is the entry. */ - idx = symb_table[2 * elem + 1]; - idx += 1 + extra[idx]; - break; - } - - /* Next entry. */ - elem += second; - } - - if (symb_table[2 * elem] == 0) - /* This is no valid character. */ - FREE_STACK_RETURN (REG_ECOLLATE); - - /* Throw away the ] at the end of the equivalence - class. */ - PATFETCH (c); - - /* Now add the multibyte character(s) we found - to the accept list. - - XXX Note that this is not entirely correct. - we would have to match multibyte sequences - but this is not possible with the current - implementation. Also, we have to match - collating symbols, which expand to more than - one file, as a whole and not allow the - individual bytes. */ - c1 = extra[idx++]; - if (c1 == 1) - range_start = extra[idx]; - while (c1-- > 0) - { - SET_LIST_BIT (extra[idx]); - ++idx; - } - } -# endif - had_char_class = false; - } - else - { - c1++; - while (c1--) - PATUNFETCH; - SET_LIST_BIT ('['); - SET_LIST_BIT ('.'); - range_start = '.'; - had_char_class = false; - } - } - else - { - had_char_class = false; - SET_LIST_BIT (c); - range_start = c; - } - } - - /* Discard any (non)matching list bytes that are all 0 at the - end of the map. Decrease the map-length byte too. */ - while ((int) b[-1] > 0 && b[b[-1] - 1] == 0) - b[-1]--; - b += b[-1]; -#endif /* WCHAR */ - } - break; - - - case '(': - if (syntax & RE_NO_BK_PARENS) - goto handle_open; - else - goto normal_char; - - - case ')': - if (syntax & RE_NO_BK_PARENS) - goto handle_close; - else - goto normal_char; - - - case '\n': - if (syntax & RE_NEWLINE_ALT) - goto handle_alt; - else - goto normal_char; - - - case '|': - if (syntax & RE_NO_BK_VBAR) - goto handle_alt; - else - goto normal_char; - - - case '{': - if (syntax & RE_INTERVALS && syntax & RE_NO_BK_BRACES) - goto handle_interval; - else - goto normal_char; - - - case '\\': - if (p == pend) FREE_STACK_RETURN (REG_EESCAPE); - - /* Do not translate the character after the \, so that we can - distinguish, e.g., \B from \b, even if we normally would - translate, e.g., B to b. */ - PATFETCH_RAW (c); - - switch (c) - { - case '(': - if (syntax & RE_NO_BK_PARENS) - goto normal_backslash; - - handle_open: - bufp->re_nsub++; - regnum++; - - if (COMPILE_STACK_FULL) - { - RETALLOC (compile_stack.stack, compile_stack.size << 1, - compile_stack_elt_t); - if (compile_stack.stack == NULL) return REG_ESPACE; - - compile_stack.size <<= 1; - } - - /* These are the values to restore when we hit end of this - group. They are all relative offsets, so that if the - whole pattern moves because of realloc, they will still - be valid. */ - COMPILE_STACK_TOP.begalt_offset = begalt - COMPILED_BUFFER_VAR; - COMPILE_STACK_TOP.fixup_alt_jump - = fixup_alt_jump ? fixup_alt_jump - COMPILED_BUFFER_VAR + 1 : 0; - COMPILE_STACK_TOP.laststart_offset = b - COMPILED_BUFFER_VAR; - COMPILE_STACK_TOP.regnum = regnum; - - /* We will eventually replace the 0 with the number of - groups inner to this one. But do not push a - start_memory for groups beyond the last one we can - represent in the compiled pattern. */ - if (regnum <= MAX_REGNUM) - { - COMPILE_STACK_TOP.inner_group_offset = b - - COMPILED_BUFFER_VAR + 2; - BUF_PUSH_3 (start_memory, regnum, 0); - } - - compile_stack.avail++; - - fixup_alt_jump = 0; - laststart = 0; - begalt = b; - /* If we've reached MAX_REGNUM groups, then this open - won't actually generate any code, so we'll have to - clear pending_exact explicitly. */ - pending_exact = 0; - break; - - - case ')': - if (syntax & RE_NO_BK_PARENS) goto normal_backslash; - - if (COMPILE_STACK_EMPTY) - { - if (syntax & RE_UNMATCHED_RIGHT_PAREN_ORD) - goto normal_backslash; - else - FREE_STACK_RETURN (REG_ERPAREN); - } - - handle_close: - if (fixup_alt_jump) - { /* Push a dummy failure point at the end of the - alternative for a possible future - `pop_failure_jump' to pop. See comments at - `push_dummy_failure' in `re_match_2'. */ - BUF_PUSH (push_dummy_failure); - - /* We allocated space for this jump when we assigned - to `fixup_alt_jump', in the `handle_alt' case below. */ - STORE_JUMP (jump_past_alt, fixup_alt_jump, b - 1); - } - - /* See similar code for backslashed left paren above. */ - if (COMPILE_STACK_EMPTY) - { - if (syntax & RE_UNMATCHED_RIGHT_PAREN_ORD) - goto normal_char; - else - FREE_STACK_RETURN (REG_ERPAREN); - } - - /* Since we just checked for an empty stack above, this - ``can't happen''. */ - assert (compile_stack.avail != 0); - { - /* We don't just want to restore into `regnum', because - later groups should continue to be numbered higher, - as in `(ab)c(de)' -- the second group is #2. */ - regnum_t this_group_regnum; - - compile_stack.avail--; - begalt = COMPILED_BUFFER_VAR + COMPILE_STACK_TOP.begalt_offset; - fixup_alt_jump - = COMPILE_STACK_TOP.fixup_alt_jump - ? COMPILED_BUFFER_VAR + COMPILE_STACK_TOP.fixup_alt_jump - 1 - : 0; - laststart = COMPILED_BUFFER_VAR + COMPILE_STACK_TOP.laststart_offset; - this_group_regnum = COMPILE_STACK_TOP.regnum; - /* If we've reached MAX_REGNUM groups, then this open - won't actually generate any code, so we'll have to - clear pending_exact explicitly. */ - pending_exact = 0; - - /* We're at the end of the group, so now we know how many - groups were inside this one. */ - if (this_group_regnum <= MAX_REGNUM) - { - UCHAR_T *inner_group_loc - = COMPILED_BUFFER_VAR + COMPILE_STACK_TOP.inner_group_offset; - - *inner_group_loc = regnum - this_group_regnum; - BUF_PUSH_3 (stop_memory, this_group_regnum, - regnum - this_group_regnum); - } - } - break; - - - case '|': /* `\|'. */ - if (syntax & RE_LIMITED_OPS || syntax & RE_NO_BK_VBAR) - goto normal_backslash; - handle_alt: - if (syntax & RE_LIMITED_OPS) - goto normal_char; - - /* Insert before the previous alternative a jump which - jumps to this alternative if the former fails. */ - GET_BUFFER_SPACE (1 + OFFSET_ADDRESS_SIZE); - INSERT_JUMP (on_failure_jump, begalt, - b + 2 + 2 * OFFSET_ADDRESS_SIZE); - pending_exact = 0; - b += 1 + OFFSET_ADDRESS_SIZE; - - /* The alternative before this one has a jump after it - which gets executed if it gets matched. Adjust that - jump so it will jump to this alternative's analogous - jump (put in below, which in turn will jump to the next - (if any) alternative's such jump, etc.). The last such - jump jumps to the correct final destination. A picture: - _____ _____ - | | | | - | v | v - a | b | c - - If we are at `b', then fixup_alt_jump right now points to a - three-byte space after `a'. We'll put in the jump, set - fixup_alt_jump to right after `b', and leave behind three - bytes which we'll fill in when we get to after `c'. */ - - if (fixup_alt_jump) - STORE_JUMP (jump_past_alt, fixup_alt_jump, b); - - /* Mark and leave space for a jump after this alternative, - to be filled in later either by next alternative or - when know we're at the end of a series of alternatives. */ - fixup_alt_jump = b; - GET_BUFFER_SPACE (1 + OFFSET_ADDRESS_SIZE); - b += 1 + OFFSET_ADDRESS_SIZE; - - laststart = 0; - begalt = b; - break; - - - case '{': - /* If \{ is a literal. */ - if (!(syntax & RE_INTERVALS) - /* If we're at `\{' and it's not the open-interval - operator. */ - || (syntax & RE_NO_BK_BRACES)) - goto normal_backslash; - - handle_interval: - { - /* If got here, then the syntax allows intervals. */ - - /* At least (most) this many matches must be made. */ - int lower_bound = -1, upper_bound = -1; - - /* Place in the uncompiled pattern (i.e., just after - the '{') to go back to if the interval is invalid. */ - const CHAR_T *beg_interval = p; - - if (p == pend) - goto invalid_interval; - - GET_UNSIGNED_NUMBER (lower_bound); - - if (c == ',') - { - GET_UNSIGNED_NUMBER (upper_bound); - if (upper_bound < 0) - upper_bound = RE_DUP_MAX; - } - else - /* Interval such as `{1}' => match exactly once. */ - upper_bound = lower_bound; - - if (! (0 <= lower_bound && lower_bound <= upper_bound)) - goto invalid_interval; - - if (!(syntax & RE_NO_BK_BRACES)) - { - if (c != '\\' || p == pend) - goto invalid_interval; - PATFETCH (c); - } - - if (c != '}') - goto invalid_interval; - - /* If it's invalid to have no preceding re. */ - if (!laststart) - { - if (syntax & RE_CONTEXT_INVALID_OPS - && !(syntax & RE_INVALID_INTERVAL_ORD)) - FREE_STACK_RETURN (REG_BADRPT); - else if (syntax & RE_CONTEXT_INDEP_OPS) - laststart = b; - else - goto unfetch_interval; - } - - /* We just parsed a valid interval. */ - - if (RE_DUP_MAX < upper_bound) - FREE_STACK_RETURN (REG_BADBR); - - /* If the upper bound is zero, don't want to succeed at - all; jump from `laststart' to `b + 3', which will be - the end of the buffer after we insert the jump. */ - /* ifdef WCHAR, 'b + 1 + OFFSET_ADDRESS_SIZE' - instead of 'b + 3'. */ - if (upper_bound == 0) - { - GET_BUFFER_SPACE (1 + OFFSET_ADDRESS_SIZE); - INSERT_JUMP (jump, laststart, b + 1 - + OFFSET_ADDRESS_SIZE); - b += 1 + OFFSET_ADDRESS_SIZE; - } - - /* Otherwise, we have a nontrivial interval. When - we're all done, the pattern will look like: - set_number_at - set_number_at - succeed_n - - jump_n - (The upper bound and `jump_n' are omitted if - `upper_bound' is 1, though.) */ - else - { /* If the upper bound is > 1, we need to insert - more at the end of the loop. */ - unsigned nbytes = 2 + 4 * OFFSET_ADDRESS_SIZE + - (upper_bound > 1) * (2 + 4 * OFFSET_ADDRESS_SIZE); - - GET_BUFFER_SPACE (nbytes); - - /* Initialize lower bound of the `succeed_n', even - though it will be set during matching by its - attendant `set_number_at' (inserted next), - because `re_compile_fastmap' needs to know. - Jump to the `jump_n' we might insert below. */ - INSERT_JUMP2 (succeed_n, laststart, - b + 1 + 2 * OFFSET_ADDRESS_SIZE - + (upper_bound > 1) * (1 + 2 * OFFSET_ADDRESS_SIZE) - , lower_bound); - b += 1 + 2 * OFFSET_ADDRESS_SIZE; - - /* Code to initialize the lower bound. Insert - before the `succeed_n'. The `5' is the last two - bytes of this `set_number_at', plus 3 bytes of - the following `succeed_n'. */ - /* ifdef WCHAR, The '1+2*OFFSET_ADDRESS_SIZE' - is the 'set_number_at', plus '1+OFFSET_ADDRESS_SIZE' - of the following `succeed_n'. */ - PREFIX(insert_op2) (set_number_at, laststart, 1 - + 2 * OFFSET_ADDRESS_SIZE, lower_bound, b); - b += 1 + 2 * OFFSET_ADDRESS_SIZE; - - if (upper_bound > 1) - { /* More than one repetition is allowed, so - append a backward jump to the `succeed_n' - that starts this interval. - - When we've reached this during matching, - we'll have matched the interval once, so - jump back only `upper_bound - 1' times. */ - STORE_JUMP2 (jump_n, b, laststart - + 2 * OFFSET_ADDRESS_SIZE + 1, - upper_bound - 1); - b += 1 + 2 * OFFSET_ADDRESS_SIZE; - - /* The location we want to set is the second - parameter of the `jump_n'; that is `b-2' as - an absolute address. `laststart' will be - the `set_number_at' we're about to insert; - `laststart+3' the number to set, the source - for the relative address. But we are - inserting into the middle of the pattern -- - so everything is getting moved up by 5. - Conclusion: (b - 2) - (laststart + 3) + 5, - i.e., b - laststart. - - We insert this at the beginning of the loop - so that if we fail during matching, we'll - reinitialize the bounds. */ - PREFIX(insert_op2) (set_number_at, laststart, - b - laststart, - upper_bound - 1, b); - b += 1 + 2 * OFFSET_ADDRESS_SIZE; - } - } - pending_exact = 0; - break; - - invalid_interval: - if (!(syntax & RE_INVALID_INTERVAL_ORD)) - FREE_STACK_RETURN (p == pend ? REG_EBRACE : REG_BADBR); - unfetch_interval: - /* Match the characters as literals. */ - p = beg_interval; - c = '{'; - if (syntax & RE_NO_BK_BRACES) - goto normal_char; - else - goto normal_backslash; - } - -#ifdef emacs - /* There is no way to specify the before_dot and after_dot - operators. rms says this is ok. --karl */ - case '=': - BUF_PUSH (at_dot); - break; - - case 's': - laststart = b; - PATFETCH (c); - BUF_PUSH_2 (syntaxspec, syntax_spec_code[c]); - break; - - case 'S': - laststart = b; - PATFETCH (c); - BUF_PUSH_2 (notsyntaxspec, syntax_spec_code[c]); - break; -#endif /* emacs */ - - - case 'w': - if (syntax & RE_NO_GNU_OPS) - goto normal_char; - laststart = b; - BUF_PUSH (wordchar); - break; - - - case 'W': - if (syntax & RE_NO_GNU_OPS) - goto normal_char; - laststart = b; - BUF_PUSH (notwordchar); - break; - - - case '<': - if (syntax & RE_NO_GNU_OPS) - goto normal_char; - BUF_PUSH (wordbeg); - break; - - case '>': - if (syntax & RE_NO_GNU_OPS) - goto normal_char; - BUF_PUSH (wordend); - break; - - case 'b': - if (syntax & RE_NO_GNU_OPS) - goto normal_char; - BUF_PUSH (wordbound); - break; - - case 'B': - if (syntax & RE_NO_GNU_OPS) - goto normal_char; - BUF_PUSH (notwordbound); - break; - - case '`': - if (syntax & RE_NO_GNU_OPS) - goto normal_char; - BUF_PUSH (begbuf); - break; - - case '\'': - if (syntax & RE_NO_GNU_OPS) - goto normal_char; - BUF_PUSH (endbuf); - break; - - case '1': case '2': case '3': case '4': case '5': - case '6': case '7': case '8': case '9': - if (syntax & RE_NO_BK_REFS) - goto normal_char; - - c1 = c - '0'; - - if (c1 > regnum) - FREE_STACK_RETURN (REG_ESUBREG); - - /* Can't back reference to a subexpression if inside of it. */ - if (group_in_compile_stack (compile_stack, (regnum_t) c1)) - goto normal_char; - - laststart = b; - BUF_PUSH_2 (duplicate, c1); - break; - - - case '+': - case '?': - if (syntax & RE_BK_PLUS_QM) - goto handle_plus; - else - goto normal_backslash; - - default: - normal_backslash: - /* You might think it would be useful for \ to mean - not to translate; but if we don't translate it - it will never match anything. */ - c = TRANSLATE (c); - goto normal_char; - } - break; - - - default: - /* Expects the character in `c'. */ - normal_char: - /* If no exactn currently being built. */ - if (!pending_exact -#ifdef WCHAR - /* If last exactn handle binary(or character) and - new exactn handle character(or binary). */ - || is_exactn_bin != is_binary[p - 1 - pattern] -#endif /* WCHAR */ - - /* If last exactn not at current position. */ - || pending_exact + *pending_exact + 1 != b - - /* We have only one byte following the exactn for the count. */ - || *pending_exact == (1 << BYTEWIDTH) - 1 - - /* If followed by a repetition operator. */ - || *p == '*' || *p == '^' - || ((syntax & RE_BK_PLUS_QM) - ? *p == '\\' && (p[1] == '+' || p[1] == '?') - : (*p == '+' || *p == '?')) - || ((syntax & RE_INTERVALS) - && ((syntax & RE_NO_BK_BRACES) - ? *p == '{' - : (p[0] == '\\' && p[1] == '{')))) - { - /* Start building a new exactn. */ - - laststart = b; - -#ifdef WCHAR - /* Is this exactn binary data or character? */ - is_exactn_bin = is_binary[p - 1 - pattern]; - if (is_exactn_bin) - BUF_PUSH_2 (exactn_bin, 0); - else - BUF_PUSH_2 (exactn, 0); -#else - BUF_PUSH_2 (exactn, 0); -#endif /* WCHAR */ - pending_exact = b - 1; - } - - BUF_PUSH (c); - (*pending_exact)++; - break; - } /* switch (c) */ - } /* while p != pend */ - - - /* Through the pattern now. */ - - if (fixup_alt_jump) - STORE_JUMP (jump_past_alt, fixup_alt_jump, b); - - if (!COMPILE_STACK_EMPTY) - FREE_STACK_RETURN (REG_EPAREN); - - /* If we don't want backtracking, force success - the first time we reach the end of the compiled pattern. */ - if (syntax & RE_NO_POSIX_BACKTRACKING) - BUF_PUSH (succeed); - -#ifdef WCHAR - free (pattern); - free (mbs_offset); - free (is_binary); -#endif - free (compile_stack.stack); - - /* We have succeeded; set the length of the buffer. */ -#ifdef WCHAR - bufp->used = (uintptr_t) b - (uintptr_t) COMPILED_BUFFER_VAR; -#else - bufp->used = b - bufp->buffer; -#endif - -#ifdef DEBUG - if (debug) - { - DEBUG_PRINT1 ("\nCompiled pattern: \n"); - PREFIX(print_compiled_pattern) (bufp); - } -#endif /* DEBUG */ - -#ifndef MATCH_MAY_ALLOCATE - /* Initialize the failure stack to the largest possible stack. This - isn't necessary unless we're trying to avoid calling alloca in - the search and match routines. */ - { - int num_regs = bufp->re_nsub + 1; - - /* Since DOUBLE_FAIL_STACK refuses to double only if the current size - is strictly greater than re_max_failures, the largest possible stack - is 2 * re_max_failures failure points. */ - if (fail_stack.size < (2 * re_max_failures * MAX_FAILURE_ITEMS)) - { - fail_stack.size = (2 * re_max_failures * MAX_FAILURE_ITEMS); - -# ifdef emacs - if (! fail_stack.stack) - fail_stack.stack - = (PREFIX(fail_stack_elt_t) *) xmalloc (fail_stack.size - * sizeof (PREFIX(fail_stack_elt_t))); - else - fail_stack.stack - = (PREFIX(fail_stack_elt_t) *) xrealloc (fail_stack.stack, - (fail_stack.size - * sizeof (PREFIX(fail_stack_elt_t)))); -# else /* not emacs */ - if (! fail_stack.stack) - fail_stack.stack - = (PREFIX(fail_stack_elt_t) *) malloc (fail_stack.size - * sizeof (PREFIX(fail_stack_elt_t))); - else - fail_stack.stack - = (PREFIX(fail_stack_elt_t) *) realloc (fail_stack.stack, - (fail_stack.size - * sizeof (PREFIX(fail_stack_elt_t)))); -# endif /* not emacs */ - } - - PREFIX(regex_grow_registers) (num_regs); - } -#endif /* not MATCH_MAY_ALLOCATE */ - - return REG_NOERROR; -} /* regex_compile */ - -/* Subroutines for `regex_compile'. */ - -/* Store OP at LOC followed by two-byte integer parameter ARG. */ -/* ifdef WCHAR, integer parameter is 1 wchar_t. */ - -static void -PREFIX(store_op1) (op, loc, arg) - re_opcode_t op; - UCHAR_T *loc; - int arg; -{ - *loc = (UCHAR_T) op; - STORE_NUMBER (loc + 1, arg); -} - - -/* Like `store_op1', but for two two-byte parameters ARG1 and ARG2. */ -/* ifdef WCHAR, integer parameter is 1 wchar_t. */ - -static void -PREFIX(store_op2) (op, loc, arg1, arg2) - re_opcode_t op; - UCHAR_T *loc; - int arg1, arg2; -{ - *loc = (UCHAR_T) op; - STORE_NUMBER (loc + 1, arg1); - STORE_NUMBER (loc + 1 + OFFSET_ADDRESS_SIZE, arg2); -} - - -/* Copy the bytes from LOC to END to open up three bytes of space at LOC - for OP followed by two-byte integer parameter ARG. */ -/* ifdef WCHAR, integer parameter is 1 wchar_t. */ - -static void -PREFIX(insert_op1) (op, loc, arg, end) - re_opcode_t op; - UCHAR_T *loc; - int arg; - UCHAR_T *end; -{ - register UCHAR_T *pfrom = end; - register UCHAR_T *pto = end + 1 + OFFSET_ADDRESS_SIZE; - - while (pfrom != loc) - *--pto = *--pfrom; - - PREFIX(store_op1) (op, loc, arg); -} - - -/* Like `insert_op1', but for two two-byte parameters ARG1 and ARG2. */ -/* ifdef WCHAR, integer parameter is 1 wchar_t. */ - -static void -PREFIX(insert_op2) (op, loc, arg1, arg2, end) - re_opcode_t op; - UCHAR_T *loc; - int arg1, arg2; - UCHAR_T *end; -{ - register UCHAR_T *pfrom = end; - register UCHAR_T *pto = end + 1 + 2 * OFFSET_ADDRESS_SIZE; - - while (pfrom != loc) - *--pto = *--pfrom; - - PREFIX(store_op2) (op, loc, arg1, arg2); -} - - -/* P points to just after a ^ in PATTERN. Return true if that ^ comes - after an alternative or a begin-subexpression. We assume there is at - least one character before the ^. */ - -static boolean -PREFIX(at_begline_loc_p) (pattern, p, syntax) - const CHAR_T *pattern, *p; - reg_syntax_t syntax; -{ - const CHAR_T *prev = p - 2; - boolean prev_prev_backslash = prev > pattern && prev[-1] == '\\'; - - return - /* After a subexpression? */ - (*prev == '(' && (syntax & RE_NO_BK_PARENS || prev_prev_backslash)) - /* After an alternative? */ - || (*prev == '|' && (syntax & RE_NO_BK_VBAR || prev_prev_backslash)); -} - - -/* The dual of at_begline_loc_p. This one is for $. We assume there is - at least one character after the $, i.e., `P < PEND'. */ - -static boolean -PREFIX(at_endline_loc_p) (p, pend, syntax) - const CHAR_T *p, *pend; - reg_syntax_t syntax; -{ - const CHAR_T *next = p; - boolean next_backslash = *next == '\\'; - const CHAR_T *next_next = p + 1 < pend ? p + 1 : 0; - - return - /* Before a subexpression? */ - (syntax & RE_NO_BK_PARENS ? *next == ')' - : next_backslash && next_next && *next_next == ')') - /* Before an alternative? */ - || (syntax & RE_NO_BK_VBAR ? *next == '|' - : next_backslash && next_next && *next_next == '|'); -} - -#else /* not INSIDE_RECURSION */ - -/* Returns true if REGNUM is in one of COMPILE_STACK's elements and - false if it's not. */ - -static boolean -group_in_compile_stack (compile_stack, regnum) - compile_stack_type compile_stack; - regnum_t regnum; -{ - int this_element; - - for (this_element = compile_stack.avail - 1; - this_element >= 0; - this_element--) - if (compile_stack.stack[this_element].regnum == regnum) - return true; - - return false; -} -#endif /* not INSIDE_RECURSION */ - -#ifdef INSIDE_RECURSION - -#ifdef WCHAR -/* This insert space, which size is "num", into the pattern at "loc". - "end" must point the end of the allocated buffer. */ -static void -insert_space (num, loc, end) - int num; - CHAR_T *loc; - CHAR_T *end; -{ - register CHAR_T *pto = end; - register CHAR_T *pfrom = end - num; - - while (pfrom >= loc) - *pto-- = *pfrom--; -} -#endif /* WCHAR */ - -#ifdef WCHAR -static reg_errcode_t -wcs_compile_range (range_start_char, p_ptr, pend, translate, syntax, b, - char_set) - CHAR_T range_start_char; - const CHAR_T **p_ptr, *pend; - CHAR_T *char_set, *b; - RE_TRANSLATE_TYPE translate; - reg_syntax_t syntax; -{ - const CHAR_T *p = *p_ptr; - CHAR_T range_start, range_end; - reg_errcode_t ret; -# ifdef _LIBC - uint32_t nrules; - uint32_t start_val, end_val; -# endif - if (p == pend) - return REG_ERANGE; - -# ifdef _LIBC - nrules = _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES); - if (nrules != 0) - { - const char *collseq = (const char *) _NL_CURRENT(LC_COLLATE, - _NL_COLLATE_COLLSEQWC); - const unsigned char *extra = (const unsigned char *) - _NL_CURRENT (LC_COLLATE, _NL_COLLATE_SYMB_EXTRAMB); - - if (range_start_char < -1) - { - /* range_start is a collating symbol. */ - int32_t *wextra; - /* Retreive the index and get collation sequence value. */ - wextra = (int32_t*)(extra + char_set[-range_start_char]); - start_val = wextra[1 + *wextra]; - } - else - start_val = collseq_table_lookup(collseq, TRANSLATE(range_start_char)); - - end_val = collseq_table_lookup (collseq, TRANSLATE (p[0])); - - /* Report an error if the range is empty and the syntax prohibits - this. */ - ret = ((syntax & RE_NO_EMPTY_RANGES) - && (start_val > end_val))? REG_ERANGE : REG_NOERROR; - - /* Insert space to the end of the char_ranges. */ - insert_space(2, b - char_set[5] - 2, b - 1); - *(b - char_set[5] - 2) = (wchar_t)start_val; - *(b - char_set[5] - 1) = (wchar_t)end_val; - char_set[4]++; /* ranges_index */ - } - else -# endif - { - range_start = (range_start_char >= 0)? TRANSLATE (range_start_char): - range_start_char; - range_end = TRANSLATE (p[0]); - /* Report an error if the range is empty and the syntax prohibits - this. */ - ret = ((syntax & RE_NO_EMPTY_RANGES) - && (range_start > range_end))? REG_ERANGE : REG_NOERROR; - - /* Insert space to the end of the char_ranges. */ - insert_space(2, b - char_set[5] - 2, b - 1); - *(b - char_set[5] - 2) = range_start; - *(b - char_set[5] - 1) = range_end; - char_set[4]++; /* ranges_index */ - } - /* Have to increment the pointer into the pattern string, so the - caller isn't still at the ending character. */ - (*p_ptr)++; - - return ret; -} -#else /* BYTE */ -/* Read the ending character of a range (in a bracket expression) from the - uncompiled pattern *P_PTR (which ends at PEND). We assume the - starting character is in `P[-2]'. (`P[-1]' is the character `-'.) - Then we set the translation of all bits between the starting and - ending characters (inclusive) in the compiled pattern B. - - Return an error code. - - We use these short variable names so we can use the same macros as - `regex_compile' itself. */ - -static reg_errcode_t -byte_compile_range (range_start_char, p_ptr, pend, translate, syntax, b) - unsigned int range_start_char; - const char **p_ptr, *pend; - RE_TRANSLATE_TYPE translate; - reg_syntax_t syntax; - unsigned char *b; -{ - unsigned this_char; - const char *p = *p_ptr; - reg_errcode_t ret; -# if _LIBC - const unsigned char *collseq; - unsigned int start_colseq; - unsigned int end_colseq; -# else - unsigned end_char; -# endif - - if (p == pend) - return REG_ERANGE; - - /* Have to increment the pointer into the pattern string, so the - caller isn't still at the ending character. */ - (*p_ptr)++; - - /* Report an error if the range is empty and the syntax prohibits this. */ - ret = syntax & RE_NO_EMPTY_RANGES ? REG_ERANGE : REG_NOERROR; - -# if _LIBC - collseq = (const unsigned char *) _NL_CURRENT (LC_COLLATE, - _NL_COLLATE_COLLSEQMB); - - start_colseq = collseq[(unsigned char) TRANSLATE (range_start_char)]; - end_colseq = collseq[(unsigned char) TRANSLATE (p[0])]; - for (this_char = 0; this_char <= (unsigned char) -1; ++this_char) - { - unsigned int this_colseq = collseq[(unsigned char) TRANSLATE (this_char)]; - - if (start_colseq <= this_colseq && this_colseq <= end_colseq) - { - SET_LIST_BIT (TRANSLATE (this_char)); - ret = REG_NOERROR; - } - } -# else - /* Here we see why `this_char' has to be larger than an `unsigned - char' -- we would otherwise go into an infinite loop, since all - characters <= 0xff. */ - range_start_char = TRANSLATE (range_start_char); - /* TRANSLATE(p[0]) is casted to char (not unsigned char) in TRANSLATE, - and some compilers cast it to int implicitly, so following for_loop - may fall to (almost) infinite loop. - e.g. If translate[p[0]] = 0xff, end_char may equals to 0xffffffff. - To avoid this, we cast p[0] to unsigned int and truncate it. */ - end_char = ((unsigned)TRANSLATE(p[0]) & ((1 << BYTEWIDTH) - 1)); - - for (this_char = range_start_char; this_char <= end_char; ++this_char) - { - SET_LIST_BIT (TRANSLATE (this_char)); - ret = REG_NOERROR; - } -# endif - - return ret; -} -#endif /* WCHAR */ - -/* re_compile_fastmap computes a ``fastmap'' for the compiled pattern in - BUFP. A fastmap records which of the (1 << BYTEWIDTH) possible - characters can start a string that matches the pattern. This fastmap - is used by re_search to skip quickly over impossible starting points. - - The caller must supply the address of a (1 << BYTEWIDTH)-byte data - area as BUFP->fastmap. - - We set the `fastmap', `fastmap_accurate', and `can_be_null' fields in - the pattern buffer. - - Returns 0 if we succeed, -2 if an internal error. */ - -#ifdef WCHAR -/* local function for re_compile_fastmap. - truncate wchar_t character to char. */ -static unsigned char truncate_wchar (CHAR_T c); - -static unsigned char -truncate_wchar (c) - CHAR_T c; -{ - unsigned char buf[MB_CUR_MAX]; - mbstate_t state; - int retval; - memset (&state, '\0', sizeof (state)); -# ifdef _LIBC - retval = __wcrtomb (buf, c, &state); -# else - retval = wcrtomb (buf, c, &state); -# endif - return retval > 0 ? buf[0] : (unsigned char) c; -} -#endif /* WCHAR */ - -static int -PREFIX(re_compile_fastmap) (bufp) - struct re_pattern_buffer *bufp; -{ - int j, k; -#ifdef MATCH_MAY_ALLOCATE - PREFIX(fail_stack_type) fail_stack; -#endif -#ifndef REGEX_MALLOC - char *destination; -#endif - - register char *fastmap = bufp->fastmap; - -#ifdef WCHAR - /* We need to cast pattern to (wchar_t*), because we casted this compiled - pattern to (char*) in regex_compile. */ - UCHAR_T *pattern = (UCHAR_T*)bufp->buffer; - register UCHAR_T *pend = (UCHAR_T*) (bufp->buffer + bufp->used); -#else /* BYTE */ - UCHAR_T *pattern = bufp->buffer; - register UCHAR_T *pend = pattern + bufp->used; -#endif /* WCHAR */ - UCHAR_T *p = pattern; - -#ifdef REL_ALLOC - /* This holds the pointer to the failure stack, when - it is allocated relocatably. */ - fail_stack_elt_t *failure_stack_ptr; -#endif - - /* Assume that each path through the pattern can be null until - proven otherwise. We set this false at the bottom of switch - statement, to which we get only if a particular path doesn't - match the empty string. */ - boolean path_can_be_null = true; - - /* We aren't doing a `succeed_n' to begin with. */ - boolean succeed_n_p = false; - - assert (fastmap != NULL && p != NULL); - - INIT_FAIL_STACK (); - bzero (fastmap, 1 << BYTEWIDTH); /* Assume nothing's valid. */ - bufp->fastmap_accurate = 1; /* It will be when we're done. */ - bufp->can_be_null = 0; - - while (1) - { - if (p == pend || *p == succeed) - { - /* We have reached the (effective) end of pattern. */ - if (!FAIL_STACK_EMPTY ()) - { - bufp->can_be_null |= path_can_be_null; - - /* Reset for next path. */ - path_can_be_null = true; - - p = fail_stack.stack[--fail_stack.avail].pointer; - - continue; - } - else - break; - } - - /* We should never be about to go beyond the end of the pattern. */ - assert (p < pend); - - switch (SWITCH_ENUM_CAST ((re_opcode_t) *p++)) - { - - /* I guess the idea here is to simply not bother with a fastmap - if a backreference is used, since it's too hard to figure out - the fastmap for the corresponding group. Setting - `can_be_null' stops `re_search_2' from using the fastmap, so - that is all we do. */ - case duplicate: - bufp->can_be_null = 1; - goto done; - - - /* Following are the cases which match a character. These end - with `break'. */ - -#ifdef WCHAR - case exactn: - fastmap[truncate_wchar(p[1])] = 1; - break; -#else /* BYTE */ - case exactn: - fastmap[p[1]] = 1; - break; -#endif /* WCHAR */ -#ifdef MBS_SUPPORT - case exactn_bin: - fastmap[p[1]] = 1; - break; -#endif - -#ifdef WCHAR - /* It is hard to distinguish fastmap from (multi byte) characters - which depends on current locale. */ - case charset: - case charset_not: - case wordchar: - case notwordchar: - bufp->can_be_null = 1; - goto done; -#else /* BYTE */ - case charset: - for (j = *p++ * BYTEWIDTH - 1; j >= 0; j--) - if (p[j / BYTEWIDTH] & (1 << (j % BYTEWIDTH))) - fastmap[j] = 1; - break; - - - case charset_not: - /* Chars beyond end of map must be allowed. */ - for (j = *p * BYTEWIDTH; j < (1 << BYTEWIDTH); j++) - fastmap[j] = 1; - - for (j = *p++ * BYTEWIDTH - 1; j >= 0; j--) - if (!(p[j / BYTEWIDTH] & (1 << (j % BYTEWIDTH)))) - fastmap[j] = 1; - break; - - - case wordchar: - for (j = 0; j < (1 << BYTEWIDTH); j++) - if (SYNTAX (j) == Sword) - fastmap[j] = 1; - break; - - - case notwordchar: - for (j = 0; j < (1 << BYTEWIDTH); j++) - if (SYNTAX (j) != Sword) - fastmap[j] = 1; - break; -#endif /* WCHAR */ - - case anychar: - { - int fastmap_newline = fastmap['\n']; - - /* `.' matches anything ... */ - for (j = 0; j < (1 << BYTEWIDTH); j++) - fastmap[j] = 1; - - /* ... except perhaps newline. */ - if (!(bufp->syntax & RE_DOT_NEWLINE)) - fastmap['\n'] = fastmap_newline; - - /* Return if we have already set `can_be_null'; if we have, - then the fastmap is irrelevant. Something's wrong here. */ - else if (bufp->can_be_null) - goto done; - - /* Otherwise, have to check alternative paths. */ - break; - } - -#ifdef emacs - case syntaxspec: - k = *p++; - for (j = 0; j < (1 << BYTEWIDTH); j++) - if (SYNTAX (j) == (enum syntaxcode) k) - fastmap[j] = 1; - break; - - - case notsyntaxspec: - k = *p++; - for (j = 0; j < (1 << BYTEWIDTH); j++) - if (SYNTAX (j) != (enum syntaxcode) k) - fastmap[j] = 1; - break; - - - /* All cases after this match the empty string. These end with - `continue'. */ - - - case before_dot: - case at_dot: - case after_dot: - continue; -#endif /* emacs */ - - - case no_op: - case begline: - case endline: - case begbuf: - case endbuf: - case wordbound: - case notwordbound: - case wordbeg: - case wordend: - case push_dummy_failure: - continue; - - - case jump_n: - case pop_failure_jump: - case maybe_pop_jump: - case jump: - case jump_past_alt: - case dummy_failure_jump: - EXTRACT_NUMBER_AND_INCR (j, p); - p += j; - if (j > 0) - continue; - - /* Jump backward implies we just went through the body of a - loop and matched nothing. Opcode jumped to should be - `on_failure_jump' or `succeed_n'. Just treat it like an - ordinary jump. For a * loop, it has pushed its failure - point already; if so, discard that as redundant. */ - if ((re_opcode_t) *p != on_failure_jump - && (re_opcode_t) *p != succeed_n) - continue; - - p++; - EXTRACT_NUMBER_AND_INCR (j, p); - p += j; - - /* If what's on the stack is where we are now, pop it. */ - if (!FAIL_STACK_EMPTY () - && fail_stack.stack[fail_stack.avail - 1].pointer == p) - fail_stack.avail--; - - continue; - - - case on_failure_jump: - case on_failure_keep_string_jump: - handle_on_failure_jump: - EXTRACT_NUMBER_AND_INCR (j, p); - - /* For some patterns, e.g., `(a?)?', `p+j' here points to the - end of the pattern. We don't want to push such a point, - since when we restore it above, entering the switch will - increment `p' past the end of the pattern. We don't need - to push such a point since we obviously won't find any more - fastmap entries beyond `pend'. Such a pattern can match - the null string, though. */ - if (p + j < pend) - { - if (!PUSH_PATTERN_OP (p + j, fail_stack)) - { - RESET_FAIL_STACK (); - return -2; - } - } - else - bufp->can_be_null = 1; - - if (succeed_n_p) - { - EXTRACT_NUMBER_AND_INCR (k, p); /* Skip the n. */ - succeed_n_p = false; - } - - continue; - - - case succeed_n: - /* Get to the number of times to succeed. */ - p += OFFSET_ADDRESS_SIZE; - - /* Increment p past the n for when k != 0. */ - EXTRACT_NUMBER_AND_INCR (k, p); - if (k == 0) - { - p -= 2 * OFFSET_ADDRESS_SIZE; - succeed_n_p = true; /* Spaghetti code alert. */ - goto handle_on_failure_jump; - } - continue; - - - case set_number_at: - p += 2 * OFFSET_ADDRESS_SIZE; - continue; - - - case start_memory: - case stop_memory: - p += 2; - continue; - - - default: - abort (); /* We have listed all the cases. */ - } /* switch *p++ */ - - /* Getting here means we have found the possible starting - characters for one path of the pattern -- and that the empty - string does not match. We need not follow this path further. - Instead, look at the next alternative (remembered on the - stack), or quit if no more. The test at the top of the loop - does these things. */ - path_can_be_null = false; - p = pend; - } /* while p */ - - /* Set `can_be_null' for the last path (also the first path, if the - pattern is empty). */ - bufp->can_be_null |= path_can_be_null; - - done: - RESET_FAIL_STACK (); - return 0; -} - -#else /* not INSIDE_RECURSION */ - -int -re_compile_fastmap (bufp) - struct re_pattern_buffer *bufp; -{ -# ifdef MBS_SUPPORT - if (MB_CUR_MAX != 1) - return wcs_re_compile_fastmap(bufp); - else -# endif - return byte_re_compile_fastmap(bufp); -} /* re_compile_fastmap */ -#ifdef _LIBC -weak_alias (__re_compile_fastmap, re_compile_fastmap) -#endif - - -/* Set REGS to hold NUM_REGS registers, storing them in STARTS and - ENDS. Subsequent matches using PATTERN_BUFFER and REGS will use - this memory for recording register information. STARTS and ENDS - must be allocated using the malloc library routine, and must each - be at least NUM_REGS * sizeof (regoff_t) bytes long. - - If NUM_REGS == 0, then subsequent matches should allocate their own - register data. - - Unless this function is called, the first search or match using - PATTERN_BUFFER will allocate its own register data, without - freeing the old data. */ - -void -re_set_registers (bufp, regs, num_regs, starts, ends) - struct re_pattern_buffer *bufp; - struct re_registers *regs; - unsigned num_regs; - regoff_t *starts, *ends; -{ - if (num_regs) - { - bufp->regs_allocated = REGS_REALLOCATE; - regs->num_regs = num_regs; - regs->start = starts; - regs->end = ends; - } - else - { - bufp->regs_allocated = REGS_UNALLOCATED; - regs->num_regs = 0; - regs->start = regs->end = (regoff_t *) 0; - } -} -#ifdef _LIBC -weak_alias (__re_set_registers, re_set_registers) -#endif - -/* Searching routines. */ - -/* Like re_search_2, below, but only one string is specified, and - doesn't let you say where to stop matching. */ - -int -re_search (bufp, string, size, startpos, range, regs) - struct re_pattern_buffer *bufp; - const char *string; - int size, startpos, range; - struct re_registers *regs; -{ - return re_search_2 (bufp, NULL, 0, string, size, startpos, range, - regs, size); -} -#ifdef _LIBC -weak_alias (__re_search, re_search) -#endif - - -/* Using the compiled pattern in BUFP->buffer, first tries to match the - virtual concatenation of STRING1 and STRING2, starting first at index - STARTPOS, then at STARTPOS + 1, and so on. - - STRING1 and STRING2 have length SIZE1 and SIZE2, respectively. - - RANGE is how far to scan while trying to match. RANGE = 0 means try - only at STARTPOS; in general, the last start tried is STARTPOS + - RANGE. - - In REGS, return the indices of the virtual concatenation of STRING1 - and STRING2 that matched the entire BUFP->buffer and its contained - subexpressions. - - Do not consider matching one past the index STOP in the virtual - concatenation of STRING1 and STRING2. - - We return either the position in the strings at which the match was - found, -1 if no match, or -2 if error (such as failure - stack overflow). */ - -int -re_search_2 (bufp, string1, size1, string2, size2, startpos, range, regs, stop) - struct re_pattern_buffer *bufp; - const char *string1, *string2; - int size1, size2; - int startpos; - int range; - struct re_registers *regs; - int stop; -{ -# ifdef MBS_SUPPORT - if (MB_CUR_MAX != 1) - return wcs_re_search_2 (bufp, string1, size1, string2, size2, startpos, - range, regs, stop); - else -# endif - return byte_re_search_2 (bufp, string1, size1, string2, size2, startpos, - range, regs, stop); -} /* re_search_2 */ -#ifdef _LIBC -weak_alias (__re_search_2, re_search_2) -#endif - -#endif /* not INSIDE_RECURSION */ - -#ifdef INSIDE_RECURSION - -#ifdef MATCH_MAY_ALLOCATE -# define FREE_VAR(var) if (var) REGEX_FREE (var); var = NULL -#else -# define FREE_VAR(var) if (var) free (var); var = NULL -#endif - -#ifdef WCHAR -# define MAX_ALLOCA_SIZE 2000 - -# define FREE_WCS_BUFFERS() \ - do { \ - if (size1 > MAX_ALLOCA_SIZE) \ - { \ - free (wcs_string1); \ - free (mbs_offset1); \ - } \ - else \ - { \ - FREE_VAR (wcs_string1); \ - FREE_VAR (mbs_offset1); \ - } \ - if (size2 > MAX_ALLOCA_SIZE) \ - { \ - free (wcs_string2); \ - free (mbs_offset2); \ - } \ - else \ - { \ - FREE_VAR (wcs_string2); \ - FREE_VAR (mbs_offset2); \ - } \ - } while (0) - -#endif - - -static int -PREFIX(re_search_2) (bufp, string1, size1, string2, size2, startpos, range, - regs, stop) - struct re_pattern_buffer *bufp; - const char *string1, *string2; - int size1, size2; - int startpos; - int range; - struct re_registers *regs; - int stop; -{ - int val; - register char *fastmap = bufp->fastmap; - register RE_TRANSLATE_TYPE translate = bufp->translate; - int total_size = size1 + size2; - int endpos = startpos + range; -#ifdef WCHAR - /* We need wchar_t* buffers correspond to cstring1, cstring2. */ - wchar_t *wcs_string1 = NULL, *wcs_string2 = NULL; - /* We need the size of wchar_t buffers correspond to csize1, csize2. */ - int wcs_size1 = 0, wcs_size2 = 0; - /* offset buffer for optimizatoin. See convert_mbs_to_wc. */ - int *mbs_offset1 = NULL, *mbs_offset2 = NULL; - /* They hold whether each wchar_t is binary data or not. */ - char *is_binary = NULL; -#endif /* WCHAR */ - - /* Check for out-of-range STARTPOS. */ - if (startpos < 0 || startpos > total_size) - return -1; - - /* Fix up RANGE if it might eventually take us outside - the virtual concatenation of STRING1 and STRING2. - Make sure we won't move STARTPOS below 0 or above TOTAL_SIZE. */ - if (endpos < 0) - range = 0 - startpos; - else if (endpos > total_size) - range = total_size - startpos; - - /* If the search isn't to be a backwards one, don't waste time in a - search for a pattern that must be anchored. */ - if (bufp->used > 0 && range > 0 - && ((re_opcode_t) bufp->buffer[0] == begbuf - /* `begline' is like `begbuf' if it cannot match at newlines. */ - || ((re_opcode_t) bufp->buffer[0] == begline - && !bufp->newline_anchor))) - { - if (startpos > 0) - return -1; - else - range = 1; - } - -#ifdef emacs - /* In a forward search for something that starts with \=. - don't keep searching past point. */ - if (bufp->used > 0 && (re_opcode_t) bufp->buffer[0] == at_dot && range > 0) - { - range = PT - startpos; - if (range <= 0) - return -1; - } -#endif /* emacs */ - - /* Update the fastmap now if not correct already. */ - if (fastmap && !bufp->fastmap_accurate) - if (re_compile_fastmap (bufp) == -2) - return -2; - -#ifdef WCHAR - /* Allocate wchar_t array for wcs_string1 and wcs_string2 and - fill them with converted string. */ - if (size1 != 0) - { - if (size1 > MAX_ALLOCA_SIZE) - { - wcs_string1 = TALLOC (size1 + 1, CHAR_T); - mbs_offset1 = TALLOC (size1 + 1, int); - is_binary = TALLOC (size1 + 1, char); - } - else - { - wcs_string1 = REGEX_TALLOC (size1 + 1, CHAR_T); - mbs_offset1 = REGEX_TALLOC (size1 + 1, int); - is_binary = REGEX_TALLOC (size1 + 1, char); - } - if (!wcs_string1 || !mbs_offset1 || !is_binary) - { - if (size1 > MAX_ALLOCA_SIZE) - { - free (wcs_string1); - free (mbs_offset1); - free (is_binary); - } - else - { - FREE_VAR (wcs_string1); - FREE_VAR (mbs_offset1); - FREE_VAR (is_binary); - } - return -2; - } - wcs_size1 = convert_mbs_to_wcs(wcs_string1, string1, size1, - mbs_offset1, is_binary); - wcs_string1[wcs_size1] = L'\0'; /* for a sentinel */ - if (size1 > MAX_ALLOCA_SIZE) - free (is_binary); - else - FREE_VAR (is_binary); - } - if (size2 != 0) - { - if (size2 > MAX_ALLOCA_SIZE) - { - wcs_string2 = TALLOC (size2 + 1, CHAR_T); - mbs_offset2 = TALLOC (size2 + 1, int); - is_binary = TALLOC (size2 + 1, char); - } - else - { - wcs_string2 = REGEX_TALLOC (size2 + 1, CHAR_T); - mbs_offset2 = REGEX_TALLOC (size2 + 1, int); - is_binary = REGEX_TALLOC (size2 + 1, char); - } - if (!wcs_string2 || !mbs_offset2 || !is_binary) - { - FREE_WCS_BUFFERS (); - if (size2 > MAX_ALLOCA_SIZE) - free (is_binary); - else - FREE_VAR (is_binary); - return -2; - } - wcs_size2 = convert_mbs_to_wcs(wcs_string2, string2, size2, - mbs_offset2, is_binary); - wcs_string2[wcs_size2] = L'\0'; /* for a sentinel */ - if (size2 > MAX_ALLOCA_SIZE) - free (is_binary); - else - FREE_VAR (is_binary); - } -#endif /* WCHAR */ - - - /* Loop through the string, looking for a place to start matching. */ - for (;;) - { - /* If a fastmap is supplied, skip quickly over characters that - cannot be the start of a match. If the pattern can match the - null string, however, we don't need to skip characters; we want - the first null string. */ - if (fastmap && startpos < total_size && !bufp->can_be_null) - { - if (range > 0) /* Searching forwards. */ - { - register const char *d; - register int lim = 0; - int irange = range; - - if (startpos < size1 && startpos + range >= size1) - lim = range - (size1 - startpos); - - d = (startpos >= size1 ? string2 - size1 : string1) + startpos; - - /* Written out as an if-else to avoid testing `translate' - inside the loop. */ - if (translate) - while (range > lim - && !fastmap[(unsigned char) - translate[(unsigned char) *d++]]) - range--; - else - while (range > lim && !fastmap[(unsigned char) *d++]) - range--; - - startpos += irange - range; - } - else /* Searching backwards. */ - { - register CHAR_T c = (size1 == 0 || startpos >= size1 - ? string2[startpos - size1] - : string1[startpos]); - - if (!fastmap[(unsigned char) TRANSLATE (c)]) - goto advance; - } - } - - /* If can't match the null string, and that's all we have left, fail. */ - if (range >= 0 && startpos == total_size && fastmap - && !bufp->can_be_null) - { -#ifdef WCHAR - FREE_WCS_BUFFERS (); -#endif - return -1; - } - -#ifdef WCHAR - val = wcs_re_match_2_internal (bufp, string1, size1, string2, - size2, startpos, regs, stop, - wcs_string1, wcs_size1, - wcs_string2, wcs_size2, - mbs_offset1, mbs_offset2); -#else /* BYTE */ - val = byte_re_match_2_internal (bufp, string1, size1, string2, - size2, startpos, regs, stop); -#endif /* BYTE */ - -#ifndef REGEX_MALLOC -# ifdef C_ALLOCA - alloca (0); -# endif -#endif - - if (val >= 0) - { -#ifdef WCHAR - FREE_WCS_BUFFERS (); -#endif - return startpos; - } - - if (val == -2) - { -#ifdef WCHAR - FREE_WCS_BUFFERS (); -#endif - return -2; - } - - advance: - if (!range) - break; - else if (range > 0) - { - range--; - startpos++; - } - else - { - range++; - startpos--; - } - } -#ifdef WCHAR - FREE_WCS_BUFFERS (); -#endif - return -1; -} - -#ifdef WCHAR -/* This converts PTR, a pointer into one of the search wchar_t strings - `string1' and `string2' into an multibyte string offset from the - beginning of that string. We use mbs_offset to optimize. - See convert_mbs_to_wcs. */ -# define POINTER_TO_OFFSET(ptr) \ - (FIRST_STRING_P (ptr) \ - ? ((regoff_t)(mbs_offset1 != NULL? mbs_offset1[(ptr)-string1] : 0)) \ - : ((regoff_t)((mbs_offset2 != NULL? mbs_offset2[(ptr)-string2] : 0) \ - + csize1))) -#else /* BYTE */ -/* This converts PTR, a pointer into one of the search strings `string1' - and `string2' into an offset from the beginning of that string. */ -# define POINTER_TO_OFFSET(ptr) \ - (FIRST_STRING_P (ptr) \ - ? ((regoff_t) ((ptr) - string1)) \ - : ((regoff_t) ((ptr) - string2 + size1))) -#endif /* WCHAR */ - -/* Macros for dealing with the split strings in re_match_2. */ - -#define MATCHING_IN_FIRST_STRING (dend == end_match_1) - -/* Call before fetching a character with *d. This switches over to - string2 if necessary. */ -#define PREFETCH() \ - while (d == dend) \ - { \ - /* End of string2 => fail. */ \ - if (dend == end_match_2) \ - goto fail; \ - /* End of string1 => advance to string2. */ \ - d = string2; \ - dend = end_match_2; \ - } - -/* Test if at very beginning or at very end of the virtual concatenation - of `string1' and `string2'. If only one string, it's `string2'. */ -#define AT_STRINGS_BEG(d) ((d) == (size1 ? string1 : string2) || !size2) -#define AT_STRINGS_END(d) ((d) == end2) - - -/* Test if D points to a character which is word-constituent. We have - two special cases to check for: if past the end of string1, look at - the first character in string2; and if before the beginning of - string2, look at the last character in string1. */ -#ifdef WCHAR -/* Use internationalized API instead of SYNTAX. */ -# define WORDCHAR_P(d) \ - (iswalnum ((wint_t)((d) == end1 ? *string2 \ - : (d) == string2 - 1 ? *(end1 - 1) : *(d))) != 0 \ - || ((d) == end1 ? *string2 \ - : (d) == string2 - 1 ? *(end1 - 1) : *(d)) == L'_') -#else /* BYTE */ -# define WORDCHAR_P(d) \ - (SYNTAX ((d) == end1 ? *string2 \ - : (d) == string2 - 1 ? *(end1 - 1) : *(d)) \ - == Sword) -#endif /* WCHAR */ - -/* Disabled due to a compiler bug -- see comment at case wordbound */ -#if 0 -/* Test if the character before D and the one at D differ with respect - to being word-constituent. */ -#define AT_WORD_BOUNDARY(d) \ - (AT_STRINGS_BEG (d) || AT_STRINGS_END (d) \ - || WORDCHAR_P (d - 1) != WORDCHAR_P (d)) -#endif - -/* Free everything we malloc. */ -#ifdef MATCH_MAY_ALLOCATE -# ifdef WCHAR -# define FREE_VARIABLES() \ - do { \ - REGEX_FREE_STACK (fail_stack.stack); \ - FREE_VAR (regstart); \ - FREE_VAR (regend); \ - FREE_VAR (old_regstart); \ - FREE_VAR (old_regend); \ - FREE_VAR (best_regstart); \ - FREE_VAR (best_regend); \ - FREE_VAR (reg_info); \ - FREE_VAR (reg_dummy); \ - FREE_VAR (reg_info_dummy); \ - if (!cant_free_wcs_buf) \ - { \ - FREE_VAR (string1); \ - FREE_VAR (string2); \ - FREE_VAR (mbs_offset1); \ - FREE_VAR (mbs_offset2); \ - } \ - } while (0) -# else /* BYTE */ -# define FREE_VARIABLES() \ - do { \ - REGEX_FREE_STACK (fail_stack.stack); \ - FREE_VAR (regstart); \ - FREE_VAR (regend); \ - FREE_VAR (old_regstart); \ - FREE_VAR (old_regend); \ - FREE_VAR (best_regstart); \ - FREE_VAR (best_regend); \ - FREE_VAR (reg_info); \ - FREE_VAR (reg_dummy); \ - FREE_VAR (reg_info_dummy); \ - } while (0) -# endif /* WCHAR */ -#else -# ifdef WCHAR -# define FREE_VARIABLES() \ - do { \ - if (!cant_free_wcs_buf) \ - { \ - FREE_VAR (string1); \ - FREE_VAR (string2); \ - FREE_VAR (mbs_offset1); \ - FREE_VAR (mbs_offset2); \ - } \ - } while (0) -# else /* BYTE */ -# define FREE_VARIABLES() ((void)0) /* Do nothing! But inhibit gcc warning. */ -# endif /* WCHAR */ -#endif /* not MATCH_MAY_ALLOCATE */ - -/* These values must meet several constraints. They must not be valid - register values; since we have a limit of 255 registers (because - we use only one byte in the pattern for the register number), we can - use numbers larger than 255. They must differ by 1, because of - NUM_FAILURE_ITEMS above. And the value for the lowest register must - be larger than the value for the highest register, so we do not try - to actually save any registers when none are active. */ -#define NO_HIGHEST_ACTIVE_REG (1 << BYTEWIDTH) -#define NO_LOWEST_ACTIVE_REG (NO_HIGHEST_ACTIVE_REG + 1) - -#else /* not INSIDE_RECURSION */ -/* Matching routines. */ - -#ifndef emacs /* Emacs never uses this. */ -/* re_match is like re_match_2 except it takes only a single string. */ - -int -re_match (bufp, string, size, pos, regs) - struct re_pattern_buffer *bufp; - const char *string; - int size, pos; - struct re_registers *regs; -{ - int result; -# ifdef MBS_SUPPORT - if (MB_CUR_MAX != 1) - result = wcs_re_match_2_internal (bufp, NULL, 0, string, size, - pos, regs, size, - NULL, 0, NULL, 0, NULL, NULL); - else -# endif - result = byte_re_match_2_internal (bufp, NULL, 0, string, size, - pos, regs, size); -# ifndef REGEX_MALLOC -# ifdef C_ALLOCA - alloca (0); -# endif -# endif - return result; -} -# ifdef _LIBC -weak_alias (__re_match, re_match) -# endif -#endif /* not emacs */ - -#endif /* not INSIDE_RECURSION */ - -#ifdef INSIDE_RECURSION -static boolean PREFIX(group_match_null_string_p) _RE_ARGS ((UCHAR_T **p, - UCHAR_T *end, - PREFIX(register_info_type) *reg_info)); -static boolean PREFIX(alt_match_null_string_p) _RE_ARGS ((UCHAR_T *p, - UCHAR_T *end, - PREFIX(register_info_type) *reg_info)); -static boolean PREFIX(common_op_match_null_string_p) _RE_ARGS ((UCHAR_T **p, - UCHAR_T *end, - PREFIX(register_info_type) *reg_info)); -static int PREFIX(bcmp_translate) _RE_ARGS ((const CHAR_T *s1, const CHAR_T *s2, - int len, char *translate)); -#else /* not INSIDE_RECURSION */ - -/* re_match_2 matches the compiled pattern in BUFP against the - the (virtual) concatenation of STRING1 and STRING2 (of length SIZE1 - and SIZE2, respectively). We start matching at POS, and stop - matching at STOP. - - If REGS is non-null and the `no_sub' field of BUFP is nonzero, we - store offsets for the substring each group matched in REGS. See the - documentation for exactly how many groups we fill. - - We return -1 if no match, -2 if an internal error (such as the - failure stack overflowing). Otherwise, we return the length of the - matched substring. */ - -int -re_match_2 (bufp, string1, size1, string2, size2, pos, regs, stop) - struct re_pattern_buffer *bufp; - const char *string1, *string2; - int size1, size2; - int pos; - struct re_registers *regs; - int stop; -{ - int result; -# ifdef MBS_SUPPORT - if (MB_CUR_MAX != 1) - result = wcs_re_match_2_internal (bufp, string1, size1, string2, size2, - pos, regs, stop, - NULL, 0, NULL, 0, NULL, NULL); - else -# endif - result = byte_re_match_2_internal (bufp, string1, size1, string2, size2, - pos, regs, stop); - -#ifndef REGEX_MALLOC -# ifdef C_ALLOCA - alloca (0); -# endif -#endif - return result; -} -#ifdef _LIBC -weak_alias (__re_match_2, re_match_2) -#endif - -#endif /* not INSIDE_RECURSION */ - -#ifdef INSIDE_RECURSION - -#ifdef WCHAR -static int count_mbs_length PARAMS ((int *, int)); - -/* This check the substring (from 0, to length) of the multibyte string, - to which offset_buffer correspond. And count how many wchar_t_characters - the substring occupy. We use offset_buffer to optimization. - See convert_mbs_to_wcs. */ - -static int -count_mbs_length(offset_buffer, length) - int *offset_buffer; - int length; -{ - int upper, lower; - - /* Check whether the size is valid. */ - if (length < 0) - return -1; - - if (offset_buffer == NULL) - return 0; - - /* If there are no multibyte character, offset_buffer[i] == i. - Optmize for this case. */ - if (offset_buffer[length] == length) - return length; - - /* Set up upper with length. (because for all i, offset_buffer[i] >= i) */ - upper = length; - lower = 0; - - while (true) - { - int middle = (lower + upper) / 2; - if (middle == lower || middle == upper) - break; - if (offset_buffer[middle] > length) - upper = middle; - else if (offset_buffer[middle] < length) - lower = middle; - else - return middle; - } - - return -1; -} -#endif /* WCHAR */ - -/* This is a separate function so that we can force an alloca cleanup - afterwards. */ -#ifdef WCHAR -static int -wcs_re_match_2_internal (bufp, cstring1, csize1, cstring2, csize2, pos, - regs, stop, string1, size1, string2, size2, - mbs_offset1, mbs_offset2) - struct re_pattern_buffer *bufp; - const char *cstring1, *cstring2; - int csize1, csize2; - int pos; - struct re_registers *regs; - int stop; - /* string1 == string2 == NULL means string1/2, size1/2 and - mbs_offset1/2 need seting up in this function. */ - /* We need wchar_t* buffers correspond to cstring1, cstring2. */ - wchar_t *string1, *string2; - /* We need the size of wchar_t buffers correspond to csize1, csize2. */ - int size1, size2; - /* offset buffer for optimizatoin. See convert_mbs_to_wc. */ - int *mbs_offset1, *mbs_offset2; -#else /* BYTE */ -static int -byte_re_match_2_internal (bufp, string1, size1,string2, size2, pos, - regs, stop) - struct re_pattern_buffer *bufp; - const char *string1, *string2; - int size1, size2; - int pos; - struct re_registers *regs; - int stop; -#endif /* BYTE */ -{ - /* General temporaries. */ - int mcnt; - UCHAR_T *p1; -#ifdef WCHAR - /* They hold whether each wchar_t is binary data or not. */ - char *is_binary = NULL; - /* If true, we can't free string1/2, mbs_offset1/2. */ - int cant_free_wcs_buf = 1; -#endif /* WCHAR */ - - /* Just past the end of the corresponding string. */ - const CHAR_T *end1, *end2; - - /* Pointers into string1 and string2, just past the last characters in - each to consider matching. */ - const CHAR_T *end_match_1, *end_match_2; - - /* Where we are in the data, and the end of the current string. */ - const CHAR_T *d, *dend; - - /* Where we are in the pattern, and the end of the pattern. */ -#ifdef WCHAR - UCHAR_T *pattern, *p; - register UCHAR_T *pend; -#else /* BYTE */ - UCHAR_T *p = bufp->buffer; - register UCHAR_T *pend = p + bufp->used; -#endif /* WCHAR */ - - /* Mark the opcode just after a start_memory, so we can test for an - empty subpattern when we get to the stop_memory. */ - UCHAR_T *just_past_start_mem = 0; - - /* We use this to map every character in the string. */ - RE_TRANSLATE_TYPE translate = bufp->translate; - - /* Failure point stack. Each place that can handle a failure further - down the line pushes a failure point on this stack. It consists of - restart, regend, and reg_info for all registers corresponding to - the subexpressions we're currently inside, plus the number of such - registers, and, finally, two char *'s. The first char * is where - to resume scanning the pattern; the second one is where to resume - scanning the strings. If the latter is zero, the failure point is - a ``dummy''; if a failure happens and the failure point is a dummy, - it gets discarded and the next next one is tried. */ -#ifdef MATCH_MAY_ALLOCATE /* otherwise, this is global. */ - PREFIX(fail_stack_type) fail_stack; -#endif -#ifdef DEBUG - static unsigned failure_id; - unsigned nfailure_points_pushed = 0, nfailure_points_popped = 0; -#endif - -#ifdef REL_ALLOC - /* This holds the pointer to the failure stack, when - it is allocated relocatably. */ - fail_stack_elt_t *failure_stack_ptr; -#endif - - /* We fill all the registers internally, independent of what we - return, for use in backreferences. The number here includes - an element for register zero. */ - size_t num_regs = bufp->re_nsub + 1; - - /* The currently active registers. */ - active_reg_t lowest_active_reg = NO_LOWEST_ACTIVE_REG; - active_reg_t highest_active_reg = NO_HIGHEST_ACTIVE_REG; - - /* Information on the contents of registers. These are pointers into - the input strings; they record just what was matched (on this - attempt) by a subexpression part of the pattern, that is, the - regnum-th regstart pointer points to where in the pattern we began - matching and the regnum-th regend points to right after where we - stopped matching the regnum-th subexpression. (The zeroth register - keeps track of what the whole pattern matches.) */ -#ifdef MATCH_MAY_ALLOCATE /* otherwise, these are global. */ - const CHAR_T **regstart, **regend; -#endif - - /* If a group that's operated upon by a repetition operator fails to - match anything, then the register for its start will need to be - restored because it will have been set to wherever in the string we - are when we last see its open-group operator. Similarly for a - register's end. */ -#ifdef MATCH_MAY_ALLOCATE /* otherwise, these are global. */ - const CHAR_T **old_regstart, **old_regend; -#endif - - /* The is_active field of reg_info helps us keep track of which (possibly - nested) subexpressions we are currently in. The matched_something - field of reg_info[reg_num] helps us tell whether or not we have - matched any of the pattern so far this time through the reg_num-th - subexpression. These two fields get reset each time through any - loop their register is in. */ -#ifdef MATCH_MAY_ALLOCATE /* otherwise, this is global. */ - PREFIX(register_info_type) *reg_info; -#endif - - /* The following record the register info as found in the above - variables when we find a match better than any we've seen before. - This happens as we backtrack through the failure points, which in - turn happens only if we have not yet matched the entire string. */ - unsigned best_regs_set = false; -#ifdef MATCH_MAY_ALLOCATE /* otherwise, these are global. */ - const CHAR_T **best_regstart, **best_regend; -#endif - - /* Logically, this is `best_regend[0]'. But we don't want to have to - allocate space for that if we're not allocating space for anything - else (see below). Also, we never need info about register 0 for - any of the other register vectors, and it seems rather a kludge to - treat `best_regend' differently than the rest. So we keep track of - the end of the best match so far in a separate variable. We - initialize this to NULL so that when we backtrack the first time - and need to test it, it's not garbage. */ - const CHAR_T *match_end = NULL; - - /* This helps SET_REGS_MATCHED avoid doing redundant work. */ - int set_regs_matched_done = 0; - - /* Used when we pop values we don't care about. */ -#ifdef MATCH_MAY_ALLOCATE /* otherwise, these are global. */ - const CHAR_T **reg_dummy; - PREFIX(register_info_type) *reg_info_dummy; -#endif - -#ifdef DEBUG - /* Counts the total number of registers pushed. */ - unsigned num_regs_pushed = 0; -#endif - - DEBUG_PRINT1 ("\n\nEntering re_match_2.\n"); - - INIT_FAIL_STACK (); - -#ifdef MATCH_MAY_ALLOCATE - /* Do not bother to initialize all the register variables if there are - no groups in the pattern, as it takes a fair amount of time. If - there are groups, we include space for register 0 (the whole - pattern), even though we never use it, since it simplifies the - array indexing. We should fix this. */ - if (bufp->re_nsub) - { - regstart = REGEX_TALLOC (num_regs, const CHAR_T *); - regend = REGEX_TALLOC (num_regs, const CHAR_T *); - old_regstart = REGEX_TALLOC (num_regs, const CHAR_T *); - old_regend = REGEX_TALLOC (num_regs, const CHAR_T *); - best_regstart = REGEX_TALLOC (num_regs, const CHAR_T *); - best_regend = REGEX_TALLOC (num_regs, const CHAR_T *); - reg_info = REGEX_TALLOC (num_regs, PREFIX(register_info_type)); - reg_dummy = REGEX_TALLOC (num_regs, const CHAR_T *); - reg_info_dummy = REGEX_TALLOC (num_regs, PREFIX(register_info_type)); - - if (!(regstart && regend && old_regstart && old_regend && reg_info - && best_regstart && best_regend && reg_dummy && reg_info_dummy)) - { - FREE_VARIABLES (); - return -2; - } - } - else - { - /* We must initialize all our variables to NULL, so that - `FREE_VARIABLES' doesn't try to free them. */ - regstart = regend = old_regstart = old_regend = best_regstart - = best_regend = reg_dummy = NULL; - reg_info = reg_info_dummy = (PREFIX(register_info_type) *) NULL; - } -#endif /* MATCH_MAY_ALLOCATE */ - - /* The starting position is bogus. */ -#ifdef WCHAR - if (pos < 0 || pos > csize1 + csize2) -#else /* BYTE */ - if (pos < 0 || pos > size1 + size2) -#endif - { - FREE_VARIABLES (); - return -1; - } - -#ifdef WCHAR - /* Allocate wchar_t array for string1 and string2 and - fill them with converted string. */ - if (string1 == NULL && string2 == NULL) - { - /* We need seting up buffers here. */ - - /* We must free wcs buffers in this function. */ - cant_free_wcs_buf = 0; - - if (csize1 != 0) - { - string1 = REGEX_TALLOC (csize1 + 1, CHAR_T); - mbs_offset1 = REGEX_TALLOC (csize1 + 1, int); - is_binary = REGEX_TALLOC (csize1 + 1, char); - if (!string1 || !mbs_offset1 || !is_binary) - { - FREE_VAR (string1); - FREE_VAR (mbs_offset1); - FREE_VAR (is_binary); - return -2; - } - } - if (csize2 != 0) - { - string2 = REGEX_TALLOC (csize2 + 1, CHAR_T); - mbs_offset2 = REGEX_TALLOC (csize2 + 1, int); - is_binary = REGEX_TALLOC (csize2 + 1, char); - if (!string2 || !mbs_offset2 || !is_binary) - { - FREE_VAR (string1); - FREE_VAR (mbs_offset1); - FREE_VAR (string2); - FREE_VAR (mbs_offset2); - FREE_VAR (is_binary); - return -2; - } - size2 = convert_mbs_to_wcs(string2, cstring2, csize2, - mbs_offset2, is_binary); - string2[size2] = L'\0'; /* for a sentinel */ - FREE_VAR (is_binary); - } - } - - /* We need to cast pattern to (wchar_t*), because we casted this compiled - pattern to (char*) in regex_compile. */ - p = pattern = (CHAR_T*)bufp->buffer; - pend = (CHAR_T*)(bufp->buffer + bufp->used); - -#endif /* WCHAR */ - - /* Initialize subexpression text positions to -1 to mark ones that no - start_memory/stop_memory has been seen for. Also initialize the - register information struct. */ - for (mcnt = 1; (unsigned) mcnt < num_regs; mcnt++) - { - regstart[mcnt] = regend[mcnt] - = old_regstart[mcnt] = old_regend[mcnt] = REG_UNSET_VALUE; - - REG_MATCH_NULL_STRING_P (reg_info[mcnt]) = MATCH_NULL_UNSET_VALUE; - IS_ACTIVE (reg_info[mcnt]) = 0; - MATCHED_SOMETHING (reg_info[mcnt]) = 0; - EVER_MATCHED_SOMETHING (reg_info[mcnt]) = 0; - } - - /* We move `string1' into `string2' if the latter's empty -- but not if - `string1' is null. */ - if (size2 == 0 && string1 != NULL) - { - string2 = string1; - size2 = size1; - string1 = 0; - size1 = 0; -#ifdef WCHAR - mbs_offset2 = mbs_offset1; - csize2 = csize1; - mbs_offset1 = NULL; - csize1 = 0; -#endif - } - end1 = string1 + size1; - end2 = string2 + size2; - - /* Compute where to stop matching, within the two strings. */ -#ifdef WCHAR - if (stop <= csize1) - { - mcnt = count_mbs_length(mbs_offset1, stop); - end_match_1 = string1 + mcnt; - end_match_2 = string2; - } - else - { - if (stop > csize1 + csize2) - stop = csize1 + csize2; - end_match_1 = end1; - mcnt = count_mbs_length(mbs_offset2, stop-csize1); - end_match_2 = string2 + mcnt; - } - if (mcnt < 0) - { /* count_mbs_length return error. */ - FREE_VARIABLES (); - return -1; - } -#else - if (stop <= size1) - { - end_match_1 = string1 + stop; - end_match_2 = string2; - } - else - { - end_match_1 = end1; - end_match_2 = string2 + stop - size1; - } -#endif /* WCHAR */ - - /* `p' scans through the pattern as `d' scans through the data. - `dend' is the end of the input string that `d' points within. `d' - is advanced into the following input string whenever necessary, but - this happens before fetching; therefore, at the beginning of the - loop, `d' can be pointing at the end of a string, but it cannot - equal `string2'. */ -#ifdef WCHAR - if (size1 > 0 && pos <= csize1) - { - mcnt = count_mbs_length(mbs_offset1, pos); - d = string1 + mcnt; - dend = end_match_1; - } - else - { - mcnt = count_mbs_length(mbs_offset2, pos-csize1); - d = string2 + mcnt; - dend = end_match_2; - } - - if (mcnt < 0) - { /* count_mbs_length return error. */ - FREE_VARIABLES (); - return -1; - } -#else - if (size1 > 0 && pos <= size1) - { - d = string1 + pos; - dend = end_match_1; - } - else - { - d = string2 + pos - size1; - dend = end_match_2; - } -#endif /* WCHAR */ - - DEBUG_PRINT1 ("The compiled pattern is:\n"); - DEBUG_PRINT_COMPILED_PATTERN (bufp, p, pend); - DEBUG_PRINT1 ("The string to match is: `"); - DEBUG_PRINT_DOUBLE_STRING (d, string1, size1, string2, size2); - DEBUG_PRINT1 ("'\n"); - - /* This loops over pattern commands. It exits by returning from the - function if the match is complete, or it drops through if the match - fails at this starting point in the input data. */ - for (;;) - { -#ifdef _LIBC - DEBUG_PRINT2 ("\n%p: ", p); -#else - DEBUG_PRINT2 ("\n0x%x: ", p); -#endif - - if (p == pend) - { /* End of pattern means we might have succeeded. */ - DEBUG_PRINT1 ("end of pattern ... "); - - /* If we haven't matched the entire string, and we want the - longest match, try backtracking. */ - if (d != end_match_2) - { - /* 1 if this match ends in the same string (string1 or string2) - as the best previous match. */ - boolean same_str_p = (FIRST_STRING_P (match_end) - == MATCHING_IN_FIRST_STRING); - /* 1 if this match is the best seen so far. */ - boolean best_match_p; - - /* AIX compiler got confused when this was combined - with the previous declaration. */ - if (same_str_p) - best_match_p = d > match_end; - else - best_match_p = !MATCHING_IN_FIRST_STRING; - - DEBUG_PRINT1 ("backtracking.\n"); - - if (!FAIL_STACK_EMPTY ()) - { /* More failure points to try. */ - - /* If exceeds best match so far, save it. */ - if (!best_regs_set || best_match_p) - { - best_regs_set = true; - match_end = d; - - DEBUG_PRINT1 ("\nSAVING match as best so far.\n"); - - for (mcnt = 1; (unsigned) mcnt < num_regs; mcnt++) - { - best_regstart[mcnt] = regstart[mcnt]; - best_regend[mcnt] = regend[mcnt]; - } - } - goto fail; - } - - /* If no failure points, don't restore garbage. And if - last match is real best match, don't restore second - best one. */ - else if (best_regs_set && !best_match_p) - { - restore_best_regs: - /* Restore best match. It may happen that `dend == - end_match_1' while the restored d is in string2. - For example, the pattern `x.*y.*z' against the - strings `x-' and `y-z-', if the two strings are - not consecutive in memory. */ - DEBUG_PRINT1 ("Restoring best registers.\n"); - - d = match_end; - dend = ((d >= string1 && d <= end1) - ? end_match_1 : end_match_2); - - for (mcnt = 1; (unsigned) mcnt < num_regs; mcnt++) - { - regstart[mcnt] = best_regstart[mcnt]; - regend[mcnt] = best_regend[mcnt]; - } - } - } /* d != end_match_2 */ - - succeed_label: - DEBUG_PRINT1 ("Accepting match.\n"); - /* If caller wants register contents data back, do it. */ - if (regs && !bufp->no_sub) - { - /* Have the register data arrays been allocated? */ - if (bufp->regs_allocated == REGS_UNALLOCATED) - { /* No. So allocate them with malloc. We need one - extra element beyond `num_regs' for the `-1' marker - GNU code uses. */ - regs->num_regs = MAX (RE_NREGS, num_regs + 1); - regs->start = TALLOC (regs->num_regs, regoff_t); - regs->end = TALLOC (regs->num_regs, regoff_t); - if (regs->start == NULL || regs->end == NULL) - { - FREE_VARIABLES (); - return -2; - } - bufp->regs_allocated = REGS_REALLOCATE; - } - else if (bufp->regs_allocated == REGS_REALLOCATE) - { /* Yes. If we need more elements than were already - allocated, reallocate them. If we need fewer, just - leave it alone. */ - if (regs->num_regs < num_regs + 1) - { - regs->num_regs = num_regs + 1; - RETALLOC (regs->start, regs->num_regs, regoff_t); - RETALLOC (regs->end, regs->num_regs, regoff_t); - if (regs->start == NULL || regs->end == NULL) - { - FREE_VARIABLES (); - return -2; - } - } - } - else - { - /* These braces fend off a "empty body in an else-statement" - warning under GCC when assert expands to nothing. */ - assert (bufp->regs_allocated == REGS_FIXED); - } - - /* Convert the pointer data in `regstart' and `regend' to - indices. Register zero has to be set differently, - since we haven't kept track of any info for it. */ - if (regs->num_regs > 0) - { - regs->start[0] = pos; -#ifdef WCHAR - if (MATCHING_IN_FIRST_STRING) - regs->end[0] = mbs_offset1 != NULL ? - mbs_offset1[d-string1] : 0; - else - regs->end[0] = csize1 + (mbs_offset2 != NULL ? - mbs_offset2[d-string2] : 0); -#else - regs->end[0] = (MATCHING_IN_FIRST_STRING - ? ((regoff_t) (d - string1)) - : ((regoff_t) (d - string2 + size1))); -#endif /* WCHAR */ - } - - /* Go through the first `min (num_regs, regs->num_regs)' - registers, since that is all we initialized. */ - for (mcnt = 1; (unsigned) mcnt < MIN (num_regs, regs->num_regs); - mcnt++) - { - if (REG_UNSET (regstart[mcnt]) || REG_UNSET (regend[mcnt])) - regs->start[mcnt] = regs->end[mcnt] = -1; - else - { - regs->start[mcnt] - = (regoff_t) POINTER_TO_OFFSET (regstart[mcnt]); - regs->end[mcnt] - = (regoff_t) POINTER_TO_OFFSET (regend[mcnt]); - } - } - - /* If the regs structure we return has more elements than - were in the pattern, set the extra elements to -1. If - we (re)allocated the registers, this is the case, - because we always allocate enough to have at least one - -1 at the end. */ - for (mcnt = num_regs; (unsigned) mcnt < regs->num_regs; mcnt++) - regs->start[mcnt] = regs->end[mcnt] = -1; - } /* regs && !bufp->no_sub */ - - DEBUG_PRINT4 ("%u failure points pushed, %u popped (%u remain).\n", - nfailure_points_pushed, nfailure_points_popped, - nfailure_points_pushed - nfailure_points_popped); - DEBUG_PRINT2 ("%u registers pushed.\n", num_regs_pushed); - -#ifdef WCHAR - if (MATCHING_IN_FIRST_STRING) - mcnt = mbs_offset1 != NULL ? mbs_offset1[d-string1] : 0; - else - mcnt = (mbs_offset2 != NULL ? mbs_offset2[d-string2] : 0) + - csize1; - mcnt -= pos; -#else - mcnt = d - pos - (MATCHING_IN_FIRST_STRING - ? string1 - : string2 - size1); -#endif /* WCHAR */ - - DEBUG_PRINT2 ("Returning %d from re_match_2.\n", mcnt); - - FREE_VARIABLES (); - return mcnt; - } - - /* Otherwise match next pattern command. */ - switch (SWITCH_ENUM_CAST ((re_opcode_t) *p++)) - { - /* Ignore these. Used to ignore the n of succeed_n's which - currently have n == 0. */ - case no_op: - DEBUG_PRINT1 ("EXECUTING no_op.\n"); - break; - - case succeed: - DEBUG_PRINT1 ("EXECUTING succeed.\n"); - goto succeed_label; - - /* Match the next n pattern characters exactly. The following - byte in the pattern defines n, and the n bytes after that - are the characters to match. */ - case exactn: -#ifdef MBS_SUPPORT - case exactn_bin: -#endif - mcnt = *p++; - DEBUG_PRINT2 ("EXECUTING exactn %d.\n", mcnt); - - /* This is written out as an if-else so we don't waste time - testing `translate' inside the loop. */ - if (translate) - { - do - { - PREFETCH (); -#ifdef WCHAR - if (*d <= 0xff) - { - if ((UCHAR_T) translate[(unsigned char) *d++] - != (UCHAR_T) *p++) - goto fail; - } - else - { - if (*d++ != (CHAR_T) *p++) - goto fail; - } -#else - if ((UCHAR_T) translate[(unsigned char) *d++] - != (UCHAR_T) *p++) - goto fail; -#endif /* WCHAR */ - } - while (--mcnt); - } - else - { - do - { - PREFETCH (); - if (*d++ != (CHAR_T) *p++) goto fail; - } - while (--mcnt); - } - SET_REGS_MATCHED (); - break; - - - /* Match any character except possibly a newline or a null. */ - case anychar: - DEBUG_PRINT1 ("EXECUTING anychar.\n"); - - PREFETCH (); - - if ((!(bufp->syntax & RE_DOT_NEWLINE) && TRANSLATE (*d) == '\n') - || (bufp->syntax & RE_DOT_NOT_NULL && TRANSLATE (*d) == '\000')) - goto fail; - - SET_REGS_MATCHED (); - DEBUG_PRINT2 (" Matched `%ld'.\n", (long int) *d); - d++; - break; - - - case charset: - case charset_not: - { - register UCHAR_T c; -#ifdef WCHAR - unsigned int i, char_class_length, coll_symbol_length, - equiv_class_length, ranges_length, chars_length, length; - CHAR_T *workp, *workp2, *charset_top; -#define WORK_BUFFER_SIZE 128 - CHAR_T str_buf[WORK_BUFFER_SIZE]; -# ifdef _LIBC - uint32_t nrules; -# endif /* _LIBC */ -#endif /* WCHAR */ - boolean not = (re_opcode_t) *(p - 1) == charset_not; - - DEBUG_PRINT2 ("EXECUTING charset%s.\n", not ? "_not" : ""); - PREFETCH (); - c = TRANSLATE (*d); /* The character to match. */ -#ifdef WCHAR -# ifdef _LIBC - nrules = _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES); -# endif /* _LIBC */ - charset_top = p - 1; - char_class_length = *p++; - coll_symbol_length = *p++; - equiv_class_length = *p++; - ranges_length = *p++; - chars_length = *p++; - /* p points charset[6], so the address of the next instruction - (charset[l+m+n+2o+k+p']) equals p[l+m+n+2*o+p'], - where l=length of char_classes, m=length of collating_symbol, - n=equivalence_class, o=length of char_range, - p'=length of character. */ - workp = p; - /* Update p to indicate the next instruction. */ - p += char_class_length + coll_symbol_length+ equiv_class_length + - 2*ranges_length + chars_length; - - /* match with char_class? */ - for (i = 0; i < char_class_length ; i += CHAR_CLASS_SIZE) - { - wctype_t wctype; - uintptr_t alignedp = ((uintptr_t)workp - + __alignof__(wctype_t) - 1) - & ~(uintptr_t)(__alignof__(wctype_t) - 1); - wctype = *((wctype_t*)alignedp); - workp += CHAR_CLASS_SIZE; -# ifdef _LIBC - if (__iswctype((wint_t)c, wctype)) - goto char_set_matched; -# else - if (iswctype((wint_t)c, wctype)) - goto char_set_matched; -# endif - } - - /* match with collating_symbol? */ -# ifdef _LIBC - if (nrules != 0) - { - const unsigned char *extra = (const unsigned char *) - _NL_CURRENT (LC_COLLATE, _NL_COLLATE_SYMB_EXTRAMB); - - for (workp2 = workp + coll_symbol_length ; workp < workp2 ; - workp++) - { - int32_t *wextra; - wextra = (int32_t*)(extra + *workp++); - for (i = 0; i < *wextra; ++i) - if (TRANSLATE(d[i]) != wextra[1 + i]) - break; - - if (i == *wextra) - { - /* Update d, however d will be incremented at - char_set_matched:, we decrement d here. */ - d += i - 1; - goto char_set_matched; - } - } - } - else /* (nrules == 0) */ -# endif - /* If we can't look up collation data, we use wcscoll - instead. */ - { - for (workp2 = workp + coll_symbol_length ; workp < workp2 ;) - { - const CHAR_T *backup_d = d, *backup_dend = dend; -# ifdef _LIBC - length = __wcslen (workp); -# else - length = wcslen (workp); -# endif - - /* If wcscoll(the collating symbol, whole string) > 0, - any substring of the string never match with the - collating symbol. */ -# ifdef _LIBC - if (__wcscoll (workp, d) > 0) -# else - if (wcscoll (workp, d) > 0) -# endif - { - workp += length + 1; - continue; - } - - /* First, we compare the collating symbol with - the first character of the string. - If it don't match, we add the next character to - the compare buffer in turn. */ - for (i = 0 ; i < WORK_BUFFER_SIZE-1 ; i++, d++) - { - int match; - if (d == dend) - { - if (dend == end_match_2) - break; - d = string2; - dend = end_match_2; - } - - /* add next character to the compare buffer. */ - str_buf[i] = TRANSLATE(*d); - str_buf[i+1] = '\0'; - -# ifdef _LIBC - match = __wcscoll (workp, str_buf); -# else - match = wcscoll (workp, str_buf); -# endif - if (match == 0) - goto char_set_matched; - - if (match < 0) - /* (str_buf > workp) indicate (str_buf + X > workp), - because for all X (str_buf + X > str_buf). - So we don't need continue this loop. */ - break; - - /* Otherwise(str_buf < workp), - (str_buf+next_character) may equals (workp). - So we continue this loop. */ - } - /* not matched */ - d = backup_d; - dend = backup_dend; - workp += length + 1; - } - } - /* match with equivalence_class? */ -# ifdef _LIBC - if (nrules != 0) - { - const CHAR_T *backup_d = d, *backup_dend = dend; - /* Try to match the equivalence class against - those known to the collate implementation. */ - const int32_t *table; - const int32_t *weights; - const int32_t *extra; - const int32_t *indirect; - int32_t idx, idx2; - wint_t *cp; - size_t len; - - /* This #include defines a local function! */ -# include - - table = (const int32_t *) - _NL_CURRENT (LC_COLLATE, _NL_COLLATE_TABLEWC); - weights = (const wint_t *) - _NL_CURRENT (LC_COLLATE, _NL_COLLATE_WEIGHTWC); - extra = (const wint_t *) - _NL_CURRENT (LC_COLLATE, _NL_COLLATE_EXTRAWC); - indirect = (const int32_t *) - _NL_CURRENT (LC_COLLATE, _NL_COLLATE_INDIRECTWC); - - /* Write 1 collating element to str_buf, and - get its index. */ - idx2 = 0; - - for (i = 0 ; idx2 == 0 && i < WORK_BUFFER_SIZE - 1; i++) - { - cp = (wint_t*)str_buf; - if (d == dend) - { - if (dend == end_match_2) - break; - d = string2; - dend = end_match_2; - } - str_buf[i] = TRANSLATE(*(d+i)); - str_buf[i+1] = '\0'; /* sentinel */ - idx2 = findidx ((const wint_t**)&cp); - } - - /* Update d, however d will be incremented at - char_set_matched:, we decrement d here. */ - d = backup_d + ((wchar_t*)cp - (wchar_t*)str_buf - 1); - if (d >= dend) - { - if (dend == end_match_2) - d = dend; - else - { - d = string2; - dend = end_match_2; - } - } - - len = weights[idx2]; - - for (workp2 = workp + equiv_class_length ; workp < workp2 ; - workp++) - { - idx = (int32_t)*workp; - /* We already checked idx != 0 in regex_compile. */ - - if (idx2 != 0 && len == weights[idx]) - { - int cnt = 0; - while (cnt < len && (weights[idx + 1 + cnt] - == weights[idx2 + 1 + cnt])) - ++cnt; - - if (cnt == len) - goto char_set_matched; - } - } - /* not matched */ - d = backup_d; - dend = backup_dend; - } - else /* (nrules == 0) */ -# endif - /* If we can't look up collation data, we use wcscoll - instead. */ - { - for (workp2 = workp + equiv_class_length ; workp < workp2 ;) - { - const CHAR_T *backup_d = d, *backup_dend = dend; -# ifdef _LIBC - length = __wcslen (workp); -# else - length = wcslen (workp); -# endif - - /* If wcscoll(the collating symbol, whole string) > 0, - any substring of the string never match with the - collating symbol. */ -# ifdef _LIBC - if (__wcscoll (workp, d) > 0) -# else - if (wcscoll (workp, d) > 0) -# endif - { - workp += length + 1; - break; - } - - /* First, we compare the equivalence class with - the first character of the string. - If it don't match, we add the next character to - the compare buffer in turn. */ - for (i = 0 ; i < WORK_BUFFER_SIZE - 1 ; i++, d++) - { - int match; - if (d == dend) - { - if (dend == end_match_2) - break; - d = string2; - dend = end_match_2; - } - - /* add next character to the compare buffer. */ - str_buf[i] = TRANSLATE(*d); - str_buf[i+1] = '\0'; - -# ifdef _LIBC - match = __wcscoll (workp, str_buf); -# else - match = wcscoll (workp, str_buf); -# endif - - if (match == 0) - goto char_set_matched; - - if (match < 0) - /* (str_buf > workp) indicate (str_buf + X > workp), - because for all X (str_buf + X > str_buf). - So we don't need continue this loop. */ - break; - - /* Otherwise(str_buf < workp), - (str_buf+next_character) may equals (workp). - So we continue this loop. */ - } - /* not matched */ - d = backup_d; - dend = backup_dend; - workp += length + 1; - } - } - - /* match with char_range? */ -# ifdef _LIBC - if (nrules != 0) - { - uint32_t collseqval; - const char *collseq = (const char *) - _NL_CURRENT(LC_COLLATE, _NL_COLLATE_COLLSEQWC); - - collseqval = collseq_table_lookup (collseq, c); - - for (; workp < p - chars_length ;) - { - uint32_t start_val, end_val; - - /* We already compute the collation sequence value - of the characters (or collating symbols). */ - start_val = (uint32_t) *workp++; /* range_start */ - end_val = (uint32_t) *workp++; /* range_end */ - - if (start_val <= collseqval && collseqval <= end_val) - goto char_set_matched; - } - } - else -# endif - { - /* We set range_start_char at str_buf[0], range_end_char - at str_buf[4], and compared char at str_buf[2]. */ - str_buf[1] = 0; - str_buf[2] = c; - str_buf[3] = 0; - str_buf[5] = 0; - for (; workp < p - chars_length ;) - { - wchar_t *range_start_char, *range_end_char; - - /* match if (range_start_char <= c <= range_end_char). */ - - /* If range_start(or end) < 0, we assume -range_start(end) - is the offset of the collating symbol which is specified - as the character of the range start(end). */ - - /* range_start */ - if (*workp < 0) - range_start_char = charset_top - (*workp++); - else - { - str_buf[0] = *workp++; - range_start_char = str_buf; - } - - /* range_end */ - if (*workp < 0) - range_end_char = charset_top - (*workp++); - else - { - str_buf[4] = *workp++; - range_end_char = str_buf + 4; - } - -# ifdef _LIBC - if (__wcscoll (range_start_char, str_buf+2) <= 0 - && __wcscoll (str_buf+2, range_end_char) <= 0) -# else - if (wcscoll (range_start_char, str_buf+2) <= 0 - && wcscoll (str_buf+2, range_end_char) <= 0) -# endif - goto char_set_matched; - } - } - - /* match with char? */ - for (; workp < p ; workp++) - if (c == *workp) - goto char_set_matched; - - not = !not; - - char_set_matched: - if (not) goto fail; -#else - /* Cast to `unsigned' instead of `unsigned char' in case the - bit list is a full 32 bytes long. */ - if (c < (unsigned) (*p * BYTEWIDTH) - && p[1 + c / BYTEWIDTH] & (1 << (c % BYTEWIDTH))) - not = !not; - - p += 1 + *p; - - if (!not) goto fail; -#undef WORK_BUFFER_SIZE -#endif /* WCHAR */ - SET_REGS_MATCHED (); - d++; - break; - } - - - /* The beginning of a group is represented by start_memory. - The arguments are the register number in the next byte, and the - number of groups inner to this one in the next. The text - matched within the group is recorded (in the internal - registers data structure) under the register number. */ - case start_memory: - DEBUG_PRINT3 ("EXECUTING start_memory %ld (%ld):\n", - (long int) *p, (long int) p[1]); - - /* Find out if this group can match the empty string. */ - p1 = p; /* To send to group_match_null_string_p. */ - - if (REG_MATCH_NULL_STRING_P (reg_info[*p]) == MATCH_NULL_UNSET_VALUE) - REG_MATCH_NULL_STRING_P (reg_info[*p]) - = PREFIX(group_match_null_string_p) (&p1, pend, reg_info); - - /* Save the position in the string where we were the last time - we were at this open-group operator in case the group is - operated upon by a repetition operator, e.g., with `(a*)*b' - against `ab'; then we want to ignore where we are now in - the string in case this attempt to match fails. */ - old_regstart[*p] = REG_MATCH_NULL_STRING_P (reg_info[*p]) - ? REG_UNSET (regstart[*p]) ? d : regstart[*p] - : regstart[*p]; - DEBUG_PRINT2 (" old_regstart: %d\n", - POINTER_TO_OFFSET (old_regstart[*p])); - - regstart[*p] = d; - DEBUG_PRINT2 (" regstart: %d\n", POINTER_TO_OFFSET (regstart[*p])); - - IS_ACTIVE (reg_info[*p]) = 1; - MATCHED_SOMETHING (reg_info[*p]) = 0; - - /* Clear this whenever we change the register activity status. */ - set_regs_matched_done = 0; - - /* This is the new highest active register. */ - highest_active_reg = *p; - - /* If nothing was active before, this is the new lowest active - register. */ - if (lowest_active_reg == NO_LOWEST_ACTIVE_REG) - lowest_active_reg = *p; - - /* Move past the register number and inner group count. */ - p += 2; - just_past_start_mem = p; - - break; - - - /* The stop_memory opcode represents the end of a group. Its - arguments are the same as start_memory's: the register - number, and the number of inner groups. */ - case stop_memory: - DEBUG_PRINT3 ("EXECUTING stop_memory %ld (%ld):\n", - (long int) *p, (long int) p[1]); - - /* We need to save the string position the last time we were at - this close-group operator in case the group is operated - upon by a repetition operator, e.g., with `((a*)*(b*)*)*' - against `aba'; then we want to ignore where we are now in - the string in case this attempt to match fails. */ - old_regend[*p] = REG_MATCH_NULL_STRING_P (reg_info[*p]) - ? REG_UNSET (regend[*p]) ? d : regend[*p] - : regend[*p]; - DEBUG_PRINT2 (" old_regend: %d\n", - POINTER_TO_OFFSET (old_regend[*p])); - - regend[*p] = d; - DEBUG_PRINT2 (" regend: %d\n", POINTER_TO_OFFSET (regend[*p])); - - /* This register isn't active anymore. */ - IS_ACTIVE (reg_info[*p]) = 0; - - /* Clear this whenever we change the register activity status. */ - set_regs_matched_done = 0; - - /* If this was the only register active, nothing is active - anymore. */ - if (lowest_active_reg == highest_active_reg) - { - lowest_active_reg = NO_LOWEST_ACTIVE_REG; - highest_active_reg = NO_HIGHEST_ACTIVE_REG; - } - else - { /* We must scan for the new highest active register, since - it isn't necessarily one less than now: consider - (a(b)c(d(e)f)g). When group 3 ends, after the f), the - new highest active register is 1. */ - UCHAR_T r = *p - 1; - while (r > 0 && !IS_ACTIVE (reg_info[r])) - r--; - - /* If we end up at register zero, that means that we saved - the registers as the result of an `on_failure_jump', not - a `start_memory', and we jumped to past the innermost - `stop_memory'. For example, in ((.)*) we save - registers 1 and 2 as a result of the *, but when we pop - back to the second ), we are at the stop_memory 1. - Thus, nothing is active. */ - if (r == 0) - { - lowest_active_reg = NO_LOWEST_ACTIVE_REG; - highest_active_reg = NO_HIGHEST_ACTIVE_REG; - } - else - highest_active_reg = r; - } - - /* If just failed to match something this time around with a - group that's operated on by a repetition operator, try to - force exit from the ``loop'', and restore the register - information for this group that we had before trying this - last match. */ - if ((!MATCHED_SOMETHING (reg_info[*p]) - || just_past_start_mem == p - 1) - && (p + 2) < pend) - { - boolean is_a_jump_n = false; - - p1 = p + 2; - mcnt = 0; - switch ((re_opcode_t) *p1++) - { - case jump_n: - is_a_jump_n = true; - case pop_failure_jump: - case maybe_pop_jump: - case jump: - case dummy_failure_jump: - EXTRACT_NUMBER_AND_INCR (mcnt, p1); - if (is_a_jump_n) - p1 += OFFSET_ADDRESS_SIZE; - break; - - default: - /* do nothing */ ; - } - p1 += mcnt; - - /* If the next operation is a jump backwards in the pattern - to an on_failure_jump right before the start_memory - corresponding to this stop_memory, exit from the loop - by forcing a failure after pushing on the stack the - on_failure_jump's jump in the pattern, and d. */ - if (mcnt < 0 && (re_opcode_t) *p1 == on_failure_jump - && (re_opcode_t) p1[1+OFFSET_ADDRESS_SIZE] == start_memory - && p1[2+OFFSET_ADDRESS_SIZE] == *p) - { - /* If this group ever matched anything, then restore - what its registers were before trying this last - failed match, e.g., with `(a*)*b' against `ab' for - regstart[1], and, e.g., with `((a*)*(b*)*)*' - against `aba' for regend[3]. - - Also restore the registers for inner groups for, - e.g., `((a*)(b*))*' against `aba' (register 3 would - otherwise get trashed). */ - - if (EVER_MATCHED_SOMETHING (reg_info[*p])) - { - unsigned r; - - EVER_MATCHED_SOMETHING (reg_info[*p]) = 0; - - /* Restore this and inner groups' (if any) registers. */ - for (r = *p; r < (unsigned) *p + (unsigned) *(p + 1); - r++) - { - regstart[r] = old_regstart[r]; - - /* xx why this test? */ - if (old_regend[r] >= regstart[r]) - regend[r] = old_regend[r]; - } - } - p1++; - EXTRACT_NUMBER_AND_INCR (mcnt, p1); - PUSH_FAILURE_POINT (p1 + mcnt, d, -2); - - goto fail; - } - } - - /* Move past the register number and the inner group count. */ - p += 2; - break; - - - /* \ has been turned into a `duplicate' command which is - followed by the numeric value of as the register number. */ - case duplicate: - { - register const CHAR_T *d2, *dend2; - int regno = *p++; /* Get which register to match against. */ - DEBUG_PRINT2 ("EXECUTING duplicate %d.\n", regno); - - /* Can't back reference a group which we've never matched. */ - if (REG_UNSET (regstart[regno]) || REG_UNSET (regend[regno])) - goto fail; - - /* Where in input to try to start matching. */ - d2 = regstart[regno]; - - /* Where to stop matching; if both the place to start and - the place to stop matching are in the same string, then - set to the place to stop, otherwise, for now have to use - the end of the first string. */ - - dend2 = ((FIRST_STRING_P (regstart[regno]) - == FIRST_STRING_P (regend[regno])) - ? regend[regno] : end_match_1); - for (;;) - { - /* If necessary, advance to next segment in register - contents. */ - while (d2 == dend2) - { - if (dend2 == end_match_2) break; - if (dend2 == regend[regno]) break; - - /* End of string1 => advance to string2. */ - d2 = string2; - dend2 = regend[regno]; - } - /* At end of register contents => success */ - if (d2 == dend2) break; - - /* If necessary, advance to next segment in data. */ - PREFETCH (); - - /* How many characters left in this segment to match. */ - mcnt = dend - d; - - /* Want how many consecutive characters we can match in - one shot, so, if necessary, adjust the count. */ - if (mcnt > dend2 - d2) - mcnt = dend2 - d2; - - /* Compare that many; failure if mismatch, else move - past them. */ - if (translate - ? PREFIX(bcmp_translate) (d, d2, mcnt, translate) - : memcmp (d, d2, mcnt*sizeof(UCHAR_T))) - goto fail; - d += mcnt, d2 += mcnt; - - /* Do this because we've match some characters. */ - SET_REGS_MATCHED (); - } - } - break; - - - /* begline matches the empty string at the beginning of the string - (unless `not_bol' is set in `bufp'), and, if - `newline_anchor' is set, after newlines. */ - case begline: - DEBUG_PRINT1 ("EXECUTING begline.\n"); - - if (AT_STRINGS_BEG (d)) - { - if (!bufp->not_bol) break; - } - else if (d[-1] == '\n' && bufp->newline_anchor) - { - break; - } - /* In all other cases, we fail. */ - goto fail; - - - /* endline is the dual of begline. */ - case endline: - DEBUG_PRINT1 ("EXECUTING endline.\n"); - - if (AT_STRINGS_END (d)) - { - if (!bufp->not_eol) break; - } - - /* We have to ``prefetch'' the next character. */ - else if ((d == end1 ? *string2 : *d) == '\n' - && bufp->newline_anchor) - { - break; - } - goto fail; - - - /* Match at the very beginning of the data. */ - case begbuf: - DEBUG_PRINT1 ("EXECUTING begbuf.\n"); - if (AT_STRINGS_BEG (d)) - break; - goto fail; - - - /* Match at the very end of the data. */ - case endbuf: - DEBUG_PRINT1 ("EXECUTING endbuf.\n"); - if (AT_STRINGS_END (d)) - break; - goto fail; - - - /* on_failure_keep_string_jump is used to optimize `.*\n'. It - pushes NULL as the value for the string on the stack. Then - `pop_failure_point' will keep the current value for the - string, instead of restoring it. To see why, consider - matching `foo\nbar' against `.*\n'. The .* matches the foo; - then the . fails against the \n. But the next thing we want - to do is match the \n against the \n; if we restored the - string value, we would be back at the foo. - - Because this is used only in specific cases, we don't need to - check all the things that `on_failure_jump' does, to make - sure the right things get saved on the stack. Hence we don't - share its code. The only reason to push anything on the - stack at all is that otherwise we would have to change - `anychar's code to do something besides goto fail in this - case; that seems worse than this. */ - case on_failure_keep_string_jump: - DEBUG_PRINT1 ("EXECUTING on_failure_keep_string_jump"); - - EXTRACT_NUMBER_AND_INCR (mcnt, p); -#ifdef _LIBC - DEBUG_PRINT3 (" %d (to %p):\n", mcnt, p + mcnt); -#else - DEBUG_PRINT3 (" %d (to 0x%x):\n", mcnt, p + mcnt); -#endif - - PUSH_FAILURE_POINT (p + mcnt, NULL, -2); - break; - - - /* Uses of on_failure_jump: - - Each alternative starts with an on_failure_jump that points - to the beginning of the next alternative. Each alternative - except the last ends with a jump that in effect jumps past - the rest of the alternatives. (They really jump to the - ending jump of the following alternative, because tensioning - these jumps is a hassle.) - - Repeats start with an on_failure_jump that points past both - the repetition text and either the following jump or - pop_failure_jump back to this on_failure_jump. */ - case on_failure_jump: - on_failure: - DEBUG_PRINT1 ("EXECUTING on_failure_jump"); - - EXTRACT_NUMBER_AND_INCR (mcnt, p); -#ifdef _LIBC - DEBUG_PRINT3 (" %d (to %p)", mcnt, p + mcnt); -#else - DEBUG_PRINT3 (" %d (to 0x%x)", mcnt, p + mcnt); -#endif - - /* If this on_failure_jump comes right before a group (i.e., - the original * applied to a group), save the information - for that group and all inner ones, so that if we fail back - to this point, the group's information will be correct. - For example, in \(a*\)*\1, we need the preceding group, - and in \(zz\(a*\)b*\)\2, we need the inner group. */ - - /* We can't use `p' to check ahead because we push - a failure point to `p + mcnt' after we do this. */ - p1 = p; - - /* We need to skip no_op's before we look for the - start_memory in case this on_failure_jump is happening as - the result of a completed succeed_n, as in \(a\)\{1,3\}b\1 - against aba. */ - while (p1 < pend && (re_opcode_t) *p1 == no_op) - p1++; - - if (p1 < pend && (re_opcode_t) *p1 == start_memory) - { - /* We have a new highest active register now. This will - get reset at the start_memory we are about to get to, - but we will have saved all the registers relevant to - this repetition op, as described above. */ - highest_active_reg = *(p1 + 1) + *(p1 + 2); - if (lowest_active_reg == NO_LOWEST_ACTIVE_REG) - lowest_active_reg = *(p1 + 1); - } - - DEBUG_PRINT1 (":\n"); - PUSH_FAILURE_POINT (p + mcnt, d, -2); - break; - - - /* A smart repeat ends with `maybe_pop_jump'. - We change it to either `pop_failure_jump' or `jump'. */ - case maybe_pop_jump: - EXTRACT_NUMBER_AND_INCR (mcnt, p); - DEBUG_PRINT2 ("EXECUTING maybe_pop_jump %d.\n", mcnt); - { - register UCHAR_T *p2 = p; - - /* Compare the beginning of the repeat with what in the - pattern follows its end. If we can establish that there - is nothing that they would both match, i.e., that we - would have to backtrack because of (as in, e.g., `a*a') - then we can change to pop_failure_jump, because we'll - never have to backtrack. - - This is not true in the case of alternatives: in - `(a|ab)*' we do need to backtrack to the `ab' alternative - (e.g., if the string was `ab'). But instead of trying to - detect that here, the alternative has put on a dummy - failure point which is what we will end up popping. */ - - /* Skip over open/close-group commands. - If what follows this loop is a ...+ construct, - look at what begins its body, since we will have to - match at least one of that. */ - while (1) - { - if (p2 + 2 < pend - && ((re_opcode_t) *p2 == stop_memory - || (re_opcode_t) *p2 == start_memory)) - p2 += 3; - else if (p2 + 2 + 2 * OFFSET_ADDRESS_SIZE < pend - && (re_opcode_t) *p2 == dummy_failure_jump) - p2 += 2 + 2 * OFFSET_ADDRESS_SIZE; - else - break; - } - - p1 = p + mcnt; - /* p1[0] ... p1[2] are the `on_failure_jump' corresponding - to the `maybe_finalize_jump' of this case. Examine what - follows. */ - - /* If we're at the end of the pattern, we can change. */ - if (p2 == pend) - { - /* Consider what happens when matching ":\(.*\)" - against ":/". I don't really understand this code - yet. */ - p[-(1+OFFSET_ADDRESS_SIZE)] = (UCHAR_T) - pop_failure_jump; - DEBUG_PRINT1 - (" End of pattern: change to `pop_failure_jump'.\n"); - } - - else if ((re_opcode_t) *p2 == exactn -#ifdef MBS_SUPPORT - || (re_opcode_t) *p2 == exactn_bin -#endif - || (bufp->newline_anchor && (re_opcode_t) *p2 == endline)) - { - register UCHAR_T c - = *p2 == (UCHAR_T) endline ? '\n' : p2[2]; - - if (((re_opcode_t) p1[1+OFFSET_ADDRESS_SIZE] == exactn -#ifdef MBS_SUPPORT - || (re_opcode_t) p1[1+OFFSET_ADDRESS_SIZE] == exactn_bin -#endif - ) && p1[3+OFFSET_ADDRESS_SIZE] != c) - { - p[-(1+OFFSET_ADDRESS_SIZE)] = (UCHAR_T) - pop_failure_jump; -#ifdef WCHAR - DEBUG_PRINT3 (" %C != %C => pop_failure_jump.\n", - (wint_t) c, - (wint_t) p1[3+OFFSET_ADDRESS_SIZE]); -#else - DEBUG_PRINT3 (" %c != %c => pop_failure_jump.\n", - (char) c, - (char) p1[3+OFFSET_ADDRESS_SIZE]); -#endif - } - -#ifndef WCHAR - else if ((re_opcode_t) p1[3] == charset - || (re_opcode_t) p1[3] == charset_not) - { - int not = (re_opcode_t) p1[3] == charset_not; - - if (c < (unsigned) (p1[4] * BYTEWIDTH) - && p1[5 + c / BYTEWIDTH] & (1 << (c % BYTEWIDTH))) - not = !not; - - /* `not' is equal to 1 if c would match, which means - that we can't change to pop_failure_jump. */ - if (!not) - { - p[-3] = (unsigned char) pop_failure_jump; - DEBUG_PRINT1 (" No match => pop_failure_jump.\n"); - } - } -#endif /* not WCHAR */ - } -#ifndef WCHAR - else if ((re_opcode_t) *p2 == charset) - { - /* We win if the first character of the loop is not part - of the charset. */ - if ((re_opcode_t) p1[3] == exactn - && ! ((int) p2[1] * BYTEWIDTH > (int) p1[5] - && (p2[2 + p1[5] / BYTEWIDTH] - & (1 << (p1[5] % BYTEWIDTH))))) - { - p[-3] = (unsigned char) pop_failure_jump; - DEBUG_PRINT1 (" No match => pop_failure_jump.\n"); - } - - else if ((re_opcode_t) p1[3] == charset_not) - { - int idx; - /* We win if the charset_not inside the loop - lists every character listed in the charset after. */ - for (idx = 0; idx < (int) p2[1]; idx++) - if (! (p2[2 + idx] == 0 - || (idx < (int) p1[4] - && ((p2[2 + idx] & ~ p1[5 + idx]) == 0)))) - break; - - if (idx == p2[1]) - { - p[-3] = (unsigned char) pop_failure_jump; - DEBUG_PRINT1 (" No match => pop_failure_jump.\n"); - } - } - else if ((re_opcode_t) p1[3] == charset) - { - int idx; - /* We win if the charset inside the loop - has no overlap with the one after the loop. */ - for (idx = 0; - idx < (int) p2[1] && idx < (int) p1[4]; - idx++) - if ((p2[2 + idx] & p1[5 + idx]) != 0) - break; - - if (idx == p2[1] || idx == p1[4]) - { - p[-3] = (unsigned char) pop_failure_jump; - DEBUG_PRINT1 (" No match => pop_failure_jump.\n"); - } - } - } -#endif /* not WCHAR */ - } - p -= OFFSET_ADDRESS_SIZE; /* Point at relative address again. */ - if ((re_opcode_t) p[-1] != pop_failure_jump) - { - p[-1] = (UCHAR_T) jump; - DEBUG_PRINT1 (" Match => jump.\n"); - goto unconditional_jump; - } - /* Note fall through. */ - - - /* The end of a simple repeat has a pop_failure_jump back to - its matching on_failure_jump, where the latter will push a - failure point. The pop_failure_jump takes off failure - points put on by this pop_failure_jump's matching - on_failure_jump; we got through the pattern to here from the - matching on_failure_jump, so didn't fail. */ - case pop_failure_jump: - { - /* We need to pass separate storage for the lowest and - highest registers, even though we don't care about the - actual values. Otherwise, we will restore only one - register from the stack, since lowest will == highest in - `pop_failure_point'. */ - active_reg_t dummy_low_reg, dummy_high_reg; - UCHAR_T *pdummy = NULL; - const CHAR_T *sdummy = NULL; - - DEBUG_PRINT1 ("EXECUTING pop_failure_jump.\n"); - POP_FAILURE_POINT (sdummy, pdummy, - dummy_low_reg, dummy_high_reg, - reg_dummy, reg_dummy, reg_info_dummy); - } - /* Note fall through. */ - - unconditional_jump: -#ifdef _LIBC - DEBUG_PRINT2 ("\n%p: ", p); -#else - DEBUG_PRINT2 ("\n0x%x: ", p); -#endif - /* Note fall through. */ - - /* Unconditionally jump (without popping any failure points). */ - case jump: - EXTRACT_NUMBER_AND_INCR (mcnt, p); /* Get the amount to jump. */ - DEBUG_PRINT2 ("EXECUTING jump %d ", mcnt); - p += mcnt; /* Do the jump. */ -#ifdef _LIBC - DEBUG_PRINT2 ("(to %p).\n", p); -#else - DEBUG_PRINT2 ("(to 0x%x).\n", p); -#endif - break; - - - /* We need this opcode so we can detect where alternatives end - in `group_match_null_string_p' et al. */ - case jump_past_alt: - DEBUG_PRINT1 ("EXECUTING jump_past_alt.\n"); - goto unconditional_jump; - - - /* Normally, the on_failure_jump pushes a failure point, which - then gets popped at pop_failure_jump. We will end up at - pop_failure_jump, also, and with a pattern of, say, `a+', we - are skipping over the on_failure_jump, so we have to push - something meaningless for pop_failure_jump to pop. */ - case dummy_failure_jump: - DEBUG_PRINT1 ("EXECUTING dummy_failure_jump.\n"); - /* It doesn't matter what we push for the string here. What - the code at `fail' tests is the value for the pattern. */ - PUSH_FAILURE_POINT (NULL, NULL, -2); - goto unconditional_jump; - - - /* At the end of an alternative, we need to push a dummy failure - point in case we are followed by a `pop_failure_jump', because - we don't want the failure point for the alternative to be - popped. For example, matching `(a|ab)*' against `aab' - requires that we match the `ab' alternative. */ - case push_dummy_failure: - DEBUG_PRINT1 ("EXECUTING push_dummy_failure.\n"); - /* See comments just above at `dummy_failure_jump' about the - two zeroes. */ - PUSH_FAILURE_POINT (NULL, NULL, -2); - break; - - /* Have to succeed matching what follows at least n times. - After that, handle like `on_failure_jump'. */ - case succeed_n: - EXTRACT_NUMBER (mcnt, p + OFFSET_ADDRESS_SIZE); - DEBUG_PRINT2 ("EXECUTING succeed_n %d.\n", mcnt); - - assert (mcnt >= 0); - /* Originally, this is how many times we HAVE to succeed. */ - if (mcnt > 0) - { - mcnt--; - p += OFFSET_ADDRESS_SIZE; - STORE_NUMBER_AND_INCR (p, mcnt); -#ifdef _LIBC - DEBUG_PRINT3 (" Setting %p to %d.\n", p - OFFSET_ADDRESS_SIZE - , mcnt); -#else - DEBUG_PRINT3 (" Setting 0x%x to %d.\n", p - OFFSET_ADDRESS_SIZE - , mcnt); -#endif - } - else if (mcnt == 0) - { -#ifdef _LIBC - DEBUG_PRINT2 (" Setting two bytes from %p to no_op.\n", - p + OFFSET_ADDRESS_SIZE); -#else - DEBUG_PRINT2 (" Setting two bytes from 0x%x to no_op.\n", - p + OFFSET_ADDRESS_SIZE); -#endif /* _LIBC */ - -#ifdef WCHAR - p[1] = (UCHAR_T) no_op; -#else - p[2] = (UCHAR_T) no_op; - p[3] = (UCHAR_T) no_op; -#endif /* WCHAR */ - goto on_failure; - } - break; - - case jump_n: - EXTRACT_NUMBER (mcnt, p + OFFSET_ADDRESS_SIZE); - DEBUG_PRINT2 ("EXECUTING jump_n %d.\n", mcnt); - - /* Originally, this is how many times we CAN jump. */ - if (mcnt) - { - mcnt--; - STORE_NUMBER (p + OFFSET_ADDRESS_SIZE, mcnt); - -#ifdef _LIBC - DEBUG_PRINT3 (" Setting %p to %d.\n", p + OFFSET_ADDRESS_SIZE, - mcnt); -#else - DEBUG_PRINT3 (" Setting 0x%x to %d.\n", p + OFFSET_ADDRESS_SIZE, - mcnt); -#endif /* _LIBC */ - goto unconditional_jump; - } - /* If don't have to jump any more, skip over the rest of command. */ - else - p += 2 * OFFSET_ADDRESS_SIZE; - break; - - case set_number_at: - { - DEBUG_PRINT1 ("EXECUTING set_number_at.\n"); - - EXTRACT_NUMBER_AND_INCR (mcnt, p); - p1 = p + mcnt; - EXTRACT_NUMBER_AND_INCR (mcnt, p); -#ifdef _LIBC - DEBUG_PRINT3 (" Setting %p to %d.\n", p1, mcnt); -#else - DEBUG_PRINT3 (" Setting 0x%x to %d.\n", p1, mcnt); -#endif - STORE_NUMBER (p1, mcnt); - break; - } - -#if 0 - /* The DEC Alpha C compiler 3.x generates incorrect code for the - test WORDCHAR_P (d - 1) != WORDCHAR_P (d) in the expansion of - AT_WORD_BOUNDARY, so this code is disabled. Expanding the - macro and introducing temporary variables works around the bug. */ - - case wordbound: - DEBUG_PRINT1 ("EXECUTING wordbound.\n"); - if (AT_WORD_BOUNDARY (d)) - break; - goto fail; - - case notwordbound: - DEBUG_PRINT1 ("EXECUTING notwordbound.\n"); - if (AT_WORD_BOUNDARY (d)) - goto fail; - break; -#else - case wordbound: - { - boolean prevchar, thischar; - - DEBUG_PRINT1 ("EXECUTING wordbound.\n"); - if (AT_STRINGS_BEG (d) || AT_STRINGS_END (d)) - break; - - prevchar = WORDCHAR_P (d - 1); - thischar = WORDCHAR_P (d); - if (prevchar != thischar) - break; - goto fail; - } - - case notwordbound: - { - boolean prevchar, thischar; - - DEBUG_PRINT1 ("EXECUTING notwordbound.\n"); - if (AT_STRINGS_BEG (d) || AT_STRINGS_END (d)) - goto fail; - - prevchar = WORDCHAR_P (d - 1); - thischar = WORDCHAR_P (d); - if (prevchar != thischar) - goto fail; - break; - } -#endif - - case wordbeg: - DEBUG_PRINT1 ("EXECUTING wordbeg.\n"); - if (!AT_STRINGS_END (d) && WORDCHAR_P (d) - && (AT_STRINGS_BEG (d) || !WORDCHAR_P (d - 1))) - break; - goto fail; - - case wordend: - DEBUG_PRINT1 ("EXECUTING wordend.\n"); - if (!AT_STRINGS_BEG (d) && WORDCHAR_P (d - 1) - && (AT_STRINGS_END (d) || !WORDCHAR_P (d))) - break; - goto fail; - -#ifdef emacs - case before_dot: - DEBUG_PRINT1 ("EXECUTING before_dot.\n"); - if (PTR_CHAR_POS ((unsigned char *) d) >= point) - goto fail; - break; - - case at_dot: - DEBUG_PRINT1 ("EXECUTING at_dot.\n"); - if (PTR_CHAR_POS ((unsigned char *) d) != point) - goto fail; - break; - - case after_dot: - DEBUG_PRINT1 ("EXECUTING after_dot.\n"); - if (PTR_CHAR_POS ((unsigned char *) d) <= point) - goto fail; - break; - - case syntaxspec: - DEBUG_PRINT2 ("EXECUTING syntaxspec %d.\n", mcnt); - mcnt = *p++; - goto matchsyntax; - - case wordchar: - DEBUG_PRINT1 ("EXECUTING Emacs wordchar.\n"); - mcnt = (int) Sword; - matchsyntax: - PREFETCH (); - /* Can't use *d++ here; SYNTAX may be an unsafe macro. */ - d++; - if (SYNTAX (d[-1]) != (enum syntaxcode) mcnt) - goto fail; - SET_REGS_MATCHED (); - break; - - case notsyntaxspec: - DEBUG_PRINT2 ("EXECUTING notsyntaxspec %d.\n", mcnt); - mcnt = *p++; - goto matchnotsyntax; - - case notwordchar: - DEBUG_PRINT1 ("EXECUTING Emacs notwordchar.\n"); - mcnt = (int) Sword; - matchnotsyntax: - PREFETCH (); - /* Can't use *d++ here; SYNTAX may be an unsafe macro. */ - d++; - if (SYNTAX (d[-1]) == (enum syntaxcode) mcnt) - goto fail; - SET_REGS_MATCHED (); - break; - -#else /* not emacs */ - case wordchar: - DEBUG_PRINT1 ("EXECUTING non-Emacs wordchar.\n"); - PREFETCH (); - if (!WORDCHAR_P (d)) - goto fail; - SET_REGS_MATCHED (); - d++; - break; - - case notwordchar: - DEBUG_PRINT1 ("EXECUTING non-Emacs notwordchar.\n"); - PREFETCH (); - if (WORDCHAR_P (d)) - goto fail; - SET_REGS_MATCHED (); - d++; - break; -#endif /* not emacs */ - - default: - abort (); - } - continue; /* Successfully executed one pattern command; keep going. */ - - - /* We goto here if a matching operation fails. */ - fail: - if (!FAIL_STACK_EMPTY ()) - { /* A restart point is known. Restore to that state. */ - DEBUG_PRINT1 ("\nFAIL:\n"); - POP_FAILURE_POINT (d, p, - lowest_active_reg, highest_active_reg, - regstart, regend, reg_info); - - /* If this failure point is a dummy, try the next one. */ - if (!p) - goto fail; - - /* If we failed to the end of the pattern, don't examine *p. */ - assert (p <= pend); - if (p < pend) - { - boolean is_a_jump_n = false; - - /* If failed to a backwards jump that's part of a repetition - loop, need to pop this failure point and use the next one. */ - switch ((re_opcode_t) *p) - { - case jump_n: - is_a_jump_n = true; - case maybe_pop_jump: - case pop_failure_jump: - case jump: - p1 = p + 1; - EXTRACT_NUMBER_AND_INCR (mcnt, p1); - p1 += mcnt; - - if ((is_a_jump_n && (re_opcode_t) *p1 == succeed_n) - || (!is_a_jump_n - && (re_opcode_t) *p1 == on_failure_jump)) - goto fail; - break; - default: - /* do nothing */ ; - } - } - - if (d >= string1 && d <= end1) - dend = end_match_1; - } - else - break; /* Matching at this starting point really fails. */ - } /* for (;;) */ - - if (best_regs_set) - goto restore_best_regs; - - FREE_VARIABLES (); - - return -1; /* Failure to match. */ -} /* re_match_2 */ - -/* Subroutine definitions for re_match_2. */ - - -/* We are passed P pointing to a register number after a start_memory. - - Return true if the pattern up to the corresponding stop_memory can - match the empty string, and false otherwise. - - If we find the matching stop_memory, sets P to point to one past its number. - Otherwise, sets P to an undefined byte less than or equal to END. - - We don't handle duplicates properly (yet). */ - -static boolean -PREFIX(group_match_null_string_p) (p, end, reg_info) - UCHAR_T **p, *end; - PREFIX(register_info_type) *reg_info; -{ - int mcnt; - /* Point to after the args to the start_memory. */ - UCHAR_T *p1 = *p + 2; - - while (p1 < end) - { - /* Skip over opcodes that can match nothing, and return true or - false, as appropriate, when we get to one that can't, or to the - matching stop_memory. */ - - switch ((re_opcode_t) *p1) - { - /* Could be either a loop or a series of alternatives. */ - case on_failure_jump: - p1++; - EXTRACT_NUMBER_AND_INCR (mcnt, p1); - - /* If the next operation is not a jump backwards in the - pattern. */ - - if (mcnt >= 0) - { - /* Go through the on_failure_jumps of the alternatives, - seeing if any of the alternatives cannot match nothing. - The last alternative starts with only a jump, - whereas the rest start with on_failure_jump and end - with a jump, e.g., here is the pattern for `a|b|c': - - /on_failure_jump/0/6/exactn/1/a/jump_past_alt/0/6 - /on_failure_jump/0/6/exactn/1/b/jump_past_alt/0/3 - /exactn/1/c - - So, we have to first go through the first (n-1) - alternatives and then deal with the last one separately. */ - - - /* Deal with the first (n-1) alternatives, which start - with an on_failure_jump (see above) that jumps to right - past a jump_past_alt. */ - - while ((re_opcode_t) p1[mcnt-(1+OFFSET_ADDRESS_SIZE)] == - jump_past_alt) - { - /* `mcnt' holds how many bytes long the alternative - is, including the ending `jump_past_alt' and - its number. */ - - if (!PREFIX(alt_match_null_string_p) (p1, p1 + mcnt - - (1 + OFFSET_ADDRESS_SIZE), - reg_info)) - return false; - - /* Move to right after this alternative, including the - jump_past_alt. */ - p1 += mcnt; - - /* Break if it's the beginning of an n-th alternative - that doesn't begin with an on_failure_jump. */ - if ((re_opcode_t) *p1 != on_failure_jump) - break; - - /* Still have to check that it's not an n-th - alternative that starts with an on_failure_jump. */ - p1++; - EXTRACT_NUMBER_AND_INCR (mcnt, p1); - if ((re_opcode_t) p1[mcnt-(1+OFFSET_ADDRESS_SIZE)] != - jump_past_alt) - { - /* Get to the beginning of the n-th alternative. */ - p1 -= 1 + OFFSET_ADDRESS_SIZE; - break; - } - } - - /* Deal with the last alternative: go back and get number - of the `jump_past_alt' just before it. `mcnt' contains - the length of the alternative. */ - EXTRACT_NUMBER (mcnt, p1 - OFFSET_ADDRESS_SIZE); - - if (!PREFIX(alt_match_null_string_p) (p1, p1 + mcnt, reg_info)) - return false; - - p1 += mcnt; /* Get past the n-th alternative. */ - } /* if mcnt > 0 */ - break; - - - case stop_memory: - assert (p1[1] == **p); - *p = p1 + 2; - return true; - - - default: - if (!PREFIX(common_op_match_null_string_p) (&p1, end, reg_info)) - return false; - } - } /* while p1 < end */ - - return false; -} /* group_match_null_string_p */ - - -/* Similar to group_match_null_string_p, but doesn't deal with alternatives: - It expects P to be the first byte of a single alternative and END one - byte past the last. The alternative can contain groups. */ - -static boolean -PREFIX(alt_match_null_string_p) (p, end, reg_info) - UCHAR_T *p, *end; - PREFIX(register_info_type) *reg_info; -{ - int mcnt; - UCHAR_T *p1 = p; - - while (p1 < end) - { - /* Skip over opcodes that can match nothing, and break when we get - to one that can't. */ - - switch ((re_opcode_t) *p1) - { - /* It's a loop. */ - case on_failure_jump: - p1++; - EXTRACT_NUMBER_AND_INCR (mcnt, p1); - p1 += mcnt; - break; - - default: - if (!PREFIX(common_op_match_null_string_p) (&p1, end, reg_info)) - return false; - } - } /* while p1 < end */ - - return true; -} /* alt_match_null_string_p */ - - -/* Deals with the ops common to group_match_null_string_p and - alt_match_null_string_p. - - Sets P to one after the op and its arguments, if any. */ - -static boolean -PREFIX(common_op_match_null_string_p) (p, end, reg_info) - UCHAR_T **p, *end; - PREFIX(register_info_type) *reg_info; -{ - int mcnt; - boolean ret; - int reg_no; - UCHAR_T *p1 = *p; - - switch ((re_opcode_t) *p1++) - { - case no_op: - case begline: - case endline: - case begbuf: - case endbuf: - case wordbeg: - case wordend: - case wordbound: - case notwordbound: -#ifdef emacs - case before_dot: - case at_dot: - case after_dot: -#endif - break; - - case start_memory: - reg_no = *p1; - assert (reg_no > 0 && reg_no <= MAX_REGNUM); - ret = PREFIX(group_match_null_string_p) (&p1, end, reg_info); - - /* Have to set this here in case we're checking a group which - contains a group and a back reference to it. */ - - if (REG_MATCH_NULL_STRING_P (reg_info[reg_no]) == MATCH_NULL_UNSET_VALUE) - REG_MATCH_NULL_STRING_P (reg_info[reg_no]) = ret; - - if (!ret) - return false; - break; - - /* If this is an optimized succeed_n for zero times, make the jump. */ - case jump: - EXTRACT_NUMBER_AND_INCR (mcnt, p1); - if (mcnt >= 0) - p1 += mcnt; - else - return false; - break; - - case succeed_n: - /* Get to the number of times to succeed. */ - p1 += OFFSET_ADDRESS_SIZE; - EXTRACT_NUMBER_AND_INCR (mcnt, p1); - - if (mcnt == 0) - { - p1 -= 2 * OFFSET_ADDRESS_SIZE; - EXTRACT_NUMBER_AND_INCR (mcnt, p1); - p1 += mcnt; - } - else - return false; - break; - - case duplicate: - if (!REG_MATCH_NULL_STRING_P (reg_info[*p1])) - return false; - break; - - case set_number_at: - p1 += 2 * OFFSET_ADDRESS_SIZE; - - default: - /* All other opcodes mean we cannot match the empty string. */ - return false; - } - - *p = p1; - return true; -} /* common_op_match_null_string_p */ - - -/* Return zero if TRANSLATE[S1] and TRANSLATE[S2] are identical for LEN - bytes; nonzero otherwise. */ - -static int -PREFIX(bcmp_translate) (s1, s2, len, translate) - const CHAR_T *s1, *s2; - register int len; - RE_TRANSLATE_TYPE translate; -{ - register const UCHAR_T *p1 = (const UCHAR_T *) s1; - register const UCHAR_T *p2 = (const UCHAR_T *) s2; - while (len) - { -#ifdef WCHAR - if (((*p1<=0xff)?translate[*p1++]:*p1++) - != ((*p2<=0xff)?translate[*p2++]:*p2++)) - return 1; -#else /* BYTE */ - if (translate[*p1++] != translate[*p2++]) return 1; -#endif /* WCHAR */ - len--; - } - return 0; -} - - -#else /* not INSIDE_RECURSION */ - -/* Entry points for GNU code. */ - -/* re_compile_pattern is the GNU regular expression compiler: it - compiles PATTERN (of length SIZE) and puts the result in BUFP. - Returns 0 if the pattern was valid, otherwise an error string. - - Assumes the `allocated' (and perhaps `buffer') and `translate' fields - are set in BUFP on entry. - - We call regex_compile to do the actual compilation. */ - -const char * -re_compile_pattern (pattern, length, bufp) - const char *pattern; - size_t length; - struct re_pattern_buffer *bufp; -{ - reg_errcode_t ret; - - /* GNU code is written to assume at least RE_NREGS registers will be set - (and at least one extra will be -1). */ - bufp->regs_allocated = REGS_UNALLOCATED; - - /* And GNU code determines whether or not to get register information - by passing null for the REGS argument to re_match, etc., not by - setting no_sub. */ - bufp->no_sub = 0; - - /* Match anchors at newline. */ - bufp->newline_anchor = 1; - -# ifdef MBS_SUPPORT - if (MB_CUR_MAX != 1) - ret = wcs_regex_compile (pattern, length, re_syntax_options, bufp); - else -# endif - ret = byte_regex_compile (pattern, length, re_syntax_options, bufp); - - if (!ret) - return NULL; - return gettext (re_error_msgid + re_error_msgid_idx[(int) ret]); -} -#ifdef _LIBC -weak_alias (__re_compile_pattern, re_compile_pattern) -#endif - -/* Entry points compatible with 4.2 BSD regex library. We don't define - them unless specifically requested. */ - -#if defined _REGEX_RE_COMP || defined _LIBC - -/* BSD has one and only one pattern buffer. */ -static struct re_pattern_buffer re_comp_buf; - -char * -#ifdef _LIBC -/* Make these definitions weak in libc, so POSIX programs can redefine - these names if they don't use our functions, and still use - regcomp/regexec below without link errors. */ -weak_function -#endif -re_comp (s) - const char *s; -{ - reg_errcode_t ret; - - if (!s) - { - if (!re_comp_buf.buffer) - return gettext ("No previous regular expression"); - return 0; - } - - if (!re_comp_buf.buffer) - { - re_comp_buf.buffer = (unsigned char *) malloc (200); - if (re_comp_buf.buffer == NULL) - return (char *) gettext (re_error_msgid - + re_error_msgid_idx[(int) REG_ESPACE]); - re_comp_buf.allocated = 200; - - re_comp_buf.fastmap = (char *) malloc (1 << BYTEWIDTH); - if (re_comp_buf.fastmap == NULL) - return (char *) gettext (re_error_msgid - + re_error_msgid_idx[(int) REG_ESPACE]); - } - - /* Since `re_exec' always passes NULL for the `regs' argument, we - don't need to initialize the pattern buffer fields which affect it. */ - - /* Match anchors at newlines. */ - re_comp_buf.newline_anchor = 1; - -# ifdef MBS_SUPPORT - if (MB_CUR_MAX != 1) - ret = wcs_regex_compile (s, strlen (s), re_syntax_options, &re_comp_buf); - else -# endif - ret = byte_regex_compile (s, strlen (s), re_syntax_options, &re_comp_buf); - - if (!ret) - return NULL; - - /* Yes, we're discarding `const' here if !HAVE_LIBINTL. */ - return (char *) gettext (re_error_msgid + re_error_msgid_idx[(int) ret]); -} - - -int -#ifdef _LIBC -weak_function -#endif -re_exec (s) - const char *s; -{ - const int len = strlen (s); - return - 0 <= re_search (&re_comp_buf, s, len, 0, len, (struct re_registers *) 0); -} - -#endif /* _REGEX_RE_COMP */ - -/* POSIX.2 functions. Don't define these for Emacs. */ - -#ifndef emacs - -/* regcomp takes a regular expression as a string and compiles it. - - PREG is a regex_t *. We do not expect any fields to be initialized, - since POSIX says we shouldn't. Thus, we set - - `buffer' to the compiled pattern; - `used' to the length of the compiled pattern; - `syntax' to RE_SYNTAX_POSIX_EXTENDED if the - REG_EXTENDED bit in CFLAGS is set; otherwise, to - RE_SYNTAX_POSIX_BASIC; - `newline_anchor' to REG_NEWLINE being set in CFLAGS; - `fastmap' to an allocated space for the fastmap; - `fastmap_accurate' to zero; - `re_nsub' to the number of subexpressions in PATTERN. - - PATTERN is the address of the pattern string. - - CFLAGS is a series of bits which affect compilation. - - If REG_EXTENDED is set, we use POSIX extended syntax; otherwise, we - use POSIX basic syntax. - - If REG_NEWLINE is set, then . and [^...] don't match newline. - Also, regexec will try a match beginning after every newline. - - If REG_ICASE is set, then we considers upper- and lowercase - versions of letters to be equivalent when matching. - - If REG_NOSUB is set, then when PREG is passed to regexec, that - routine will report only success or failure, and nothing about the - registers. - - It returns 0 if it succeeds, nonzero if it doesn't. (See regex.h for - the return codes and their meanings.) */ - -int -regcomp (preg, pattern, cflags) - regex_t *preg; - const char *pattern; - int cflags; -{ - reg_errcode_t ret; - reg_syntax_t syntax - = (cflags & REG_EXTENDED) ? - RE_SYNTAX_POSIX_EXTENDED : RE_SYNTAX_POSIX_BASIC; - - /* regex_compile will allocate the space for the compiled pattern. */ - preg->buffer = 0; - preg->allocated = 0; - preg->used = 0; - - /* Try to allocate space for the fastmap. */ - preg->fastmap = (char *) malloc (1 << BYTEWIDTH); - - if (cflags & REG_ICASE) - { - unsigned i; - - preg->translate - = (RE_TRANSLATE_TYPE) malloc (CHAR_SET_SIZE - * sizeof (*(RE_TRANSLATE_TYPE)0)); - if (preg->translate == NULL) - return (int) REG_ESPACE; - - /* Map uppercase characters to corresponding lowercase ones. */ - for (i = 0; i < CHAR_SET_SIZE; i++) - preg->translate[i] = ISUPPER (i) ? TOLOWER (i) : i; - } - else - preg->translate = NULL; - - /* If REG_NEWLINE is set, newlines are treated differently. */ - if (cflags & REG_NEWLINE) - { /* REG_NEWLINE implies neither . nor [^...] match newline. */ - syntax &= ~RE_DOT_NEWLINE; - syntax |= RE_HAT_LISTS_NOT_NEWLINE; - /* It also changes the matching behavior. */ - preg->newline_anchor = 1; - } - else - preg->newline_anchor = 0; - - preg->no_sub = !!(cflags & REG_NOSUB); - - /* POSIX says a null character in the pattern terminates it, so we - can use strlen here in compiling the pattern. */ -# ifdef MBS_SUPPORT - if (MB_CUR_MAX != 1) - ret = wcs_regex_compile (pattern, strlen (pattern), syntax, preg); - else -# endif - ret = byte_regex_compile (pattern, strlen (pattern), syntax, preg); - - /* POSIX doesn't distinguish between an unmatched open-group and an - unmatched close-group: both are REG_EPAREN. */ - if (ret == REG_ERPAREN) ret = REG_EPAREN; - - if (ret == REG_NOERROR && preg->fastmap) - { - /* Compute the fastmap now, since regexec cannot modify the pattern - buffer. */ - if (re_compile_fastmap (preg) == -2) - { - /* Some error occurred while computing the fastmap, just forget - about it. */ - free (preg->fastmap); - preg->fastmap = NULL; - } - } - - return (int) ret; -} -#ifdef _LIBC -weak_alias (__regcomp, regcomp) -#endif - - -/* regexec searches for a given pattern, specified by PREG, in the - string STRING. - - If NMATCH is zero or REG_NOSUB was set in the cflags argument to - `regcomp', we ignore PMATCH. Otherwise, we assume PMATCH has at - least NMATCH elements, and we set them to the offsets of the - corresponding matched substrings. - - EFLAGS specifies `execution flags' which affect matching: if - REG_NOTBOL is set, then ^ does not match at the beginning of the - string; if REG_NOTEOL is set, then $ does not match at the end. - - We return 0 if we find a match and REG_NOMATCH if not. */ - -int -regexec (preg, string, nmatch, pmatch, eflags) - const regex_t *preg; - const char *string; - size_t nmatch; - regmatch_t pmatch[]; - int eflags; -{ - int ret; - struct re_registers regs; - regex_t private_preg; - int len = strlen (string); - boolean want_reg_info = !preg->no_sub && nmatch > 0; - - private_preg = *preg; - - private_preg.not_bol = !!(eflags & REG_NOTBOL); - private_preg.not_eol = !!(eflags & REG_NOTEOL); - - /* The user has told us exactly how many registers to return - information about, via `nmatch'. We have to pass that on to the - matching routines. */ - private_preg.regs_allocated = REGS_FIXED; - - if (want_reg_info) - { - regs.num_regs = nmatch; - regs.start = TALLOC (nmatch * 2, regoff_t); - if (regs.start == NULL) - return (int) REG_NOMATCH; - regs.end = regs.start + nmatch; - } - - /* Perform the searching operation. */ - ret = re_search (&private_preg, string, len, - /* start: */ 0, /* range: */ len, - want_reg_info ? ®s : (struct re_registers *) 0); - - /* Copy the register information to the POSIX structure. */ - if (want_reg_info) - { - if (ret >= 0) - { - unsigned r; - - for (r = 0; r < nmatch; r++) - { - pmatch[r].rm_so = regs.start[r]; - pmatch[r].rm_eo = regs.end[r]; - } - } - - /* If we needed the temporary register info, free the space now. */ - free (regs.start); - } - - /* We want zero return to mean success, unlike `re_search'. */ - return ret >= 0 ? (int) REG_NOERROR : (int) REG_NOMATCH; -} -#ifdef _LIBC -weak_alias (__regexec, regexec) -#endif - - -/* Returns a message corresponding to an error code, ERRCODE, returned - from either regcomp or regexec. We don't use PREG here. */ - -size_t -regerror (errcode, preg, errbuf, errbuf_size) - int errcode; - const regex_t *preg; - char *errbuf; - size_t errbuf_size; -{ - const char *msg; - size_t msg_size; - - if (errcode < 0 - || errcode >= (int) (sizeof (re_error_msgid_idx) - / sizeof (re_error_msgid_idx[0]))) - /* Only error codes returned by the rest of the code should be passed - to this routine. If we are given anything else, or if other regex - code generates an invalid error code, then the program has a bug. - Dump core so we can fix it. */ - abort (); - - msg = gettext (re_error_msgid + re_error_msgid_idx[errcode]); - - msg_size = strlen (msg) + 1; /* Includes the null. */ - - if (errbuf_size != 0) - { - if (msg_size > errbuf_size) - { -#if defined HAVE_MEMPCPY || defined _LIBC - *((char *) __mempcpy (errbuf, msg, errbuf_size - 1)) = '\0'; -#else - memcpy (errbuf, msg, errbuf_size - 1); - errbuf[errbuf_size - 1] = 0; -#endif - } - else - memcpy (errbuf, msg, msg_size); - } - - return msg_size; -} -#ifdef _LIBC -weak_alias (__regerror, regerror) -#endif - - -/* Free dynamically allocated space used by PREG. */ - -void -regfree (preg) - regex_t *preg; -{ - if (preg->buffer != NULL) - free (preg->buffer); - preg->buffer = NULL; - - preg->allocated = 0; - preg->used = 0; - - if (preg->fastmap != NULL) - free (preg->fastmap); - preg->fastmap = NULL; - preg->fastmap_accurate = 0; - - if (preg->translate != NULL) - free (preg->translate); - preg->translate = NULL; -} -#ifdef _LIBC -weak_alias (__regfree, regfree) -#endif - -#endif /* not emacs */ - -#endif /* not INSIDE_RECURSION */ - - -#undef STORE_NUMBER -#undef STORE_NUMBER_AND_INCR -#undef EXTRACT_NUMBER -#undef EXTRACT_NUMBER_AND_INCR - -#undef DEBUG_PRINT_COMPILED_PATTERN -#undef DEBUG_PRINT_DOUBLE_STRING - -#undef INIT_FAIL_STACK -#undef RESET_FAIL_STACK -#undef DOUBLE_FAIL_STACK -#undef PUSH_PATTERN_OP -#undef PUSH_FAILURE_POINTER -#undef PUSH_FAILURE_INT -#undef PUSH_FAILURE_ELT -#undef POP_FAILURE_POINTER -#undef POP_FAILURE_INT -#undef POP_FAILURE_ELT -#undef DEBUG_PUSH -#undef DEBUG_POP -#undef PUSH_FAILURE_POINT -#undef POP_FAILURE_POINT - -#undef REG_UNSET_VALUE -#undef REG_UNSET - -#undef PATFETCH -#undef PATFETCH_RAW -#undef PATUNFETCH -#undef TRANSLATE - -#undef INIT_BUF_SIZE -#undef GET_BUFFER_SPACE -#undef BUF_PUSH -#undef BUF_PUSH_2 -#undef BUF_PUSH_3 -#undef STORE_JUMP -#undef STORE_JUMP2 -#undef INSERT_JUMP -#undef INSERT_JUMP2 -#undef EXTEND_BUFFER -#undef GET_UNSIGNED_NUMBER -#undef FREE_STACK_RETURN - -# undef POINTER_TO_OFFSET -# undef MATCHING_IN_FRST_STRING -# undef PREFETCH -# undef AT_STRINGS_BEG -# undef AT_STRINGS_END -# undef WORDCHAR_P -# undef FREE_VAR -# undef FREE_VARIABLES -# undef NO_HIGHEST_ACTIVE_REG -# undef NO_LOWEST_ACTIVE_REG - -# undef CHAR_T -# undef UCHAR_T -# undef COMPILED_BUFFER_VAR -# undef OFFSET_ADDRESS_SIZE -# undef CHAR_CLASS_SIZE -# undef PREFIX -# undef ARG_PREFIX -# undef PUT_CHAR -# undef BYTE -# undef WCHAR - -# define DEFINED_ONCE diff --git a/libc/misc/regex/regex_old.c b/libc/misc/regex/regex_old.c new file mode 100644 index 000000000..3e9d2eb30 --- /dev/null +++ b/libc/misc/regex/regex_old.c @@ -0,0 +1,8383 @@ +/* Extended regular expression matching and search library, + version 0.12. + (Implements POSIX draft P1003.2/D11.2, except for some of the + internationalization features.) + Copyright (C) 1993-1999, 2000, 2001 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#define HAVE_MEMPCPY +#define __mempcpy __libc_mempcpy +#define memset __memset +#define memcmp __memcmp +#define strcmp __strcmp +#define strlen __strlen +#define wcslen __wcslen +/* for some reason this does not work */ +#define memcpy __memcpy + +/* To exclude some unwanted junk.... */ +#undef _LIBC +#undef emacs +#define _REGEX_RE_COMP +#include +#include +#include +#define STDC_HEADERS +#define RE_TRANSLATE_TYPE char * + +extern void *__libc_mempcpy (void *__restrict __dest, + __const void *__restrict __src, size_t __n) /*attribute_hidden*/; + +/* AIX requires this to be the first thing in the file. */ +#if defined _AIX && !defined REGEX_MALLOC + #pragma alloca +#endif + +#undef _GNU_SOURCE +#define _GNU_SOURCE + +#ifdef HAVE_CONFIG_H +# include +#endif + +#ifndef PARAMS +# if defined __GNUC__ || (defined __STDC__ && __STDC__) +# define PARAMS(args) args +# else +# define PARAMS(args) () +# endif /* GCC. */ +#endif /* Not PARAMS. */ + +#ifndef INSIDE_RECURSION + +# if defined STDC_HEADERS && !defined emacs +# include +# else +/* We need this for `regex.h', and perhaps for the Emacs include files. */ +# include +# endif + + +/* For platform which support the ISO C amendement 1 functionality we + support user defined character classes. */ +#if defined __UCLIBC_HAS_WCHAR__ +# define WIDE_CHAR_SUPPORT 1 +/* Solaris 2.5 has a bug: must be included before . */ +# include +# include +# endif + +# ifdef _LIBC +/* We have to keep the namespace clean. */ +# define regfree(preg) __regfree (preg) +# define regexec(pr, st, nm, pm, ef) __regexec (pr, st, nm, pm, ef) +# define regcomp(preg, pattern, cflags) __regcomp (preg, pattern, cflags) +# define regerror(errcode, preg, errbuf, errbuf_size) \ + __regerror(errcode, preg, errbuf, errbuf_size) +# define re_set_registers(bu, re, nu, st, en) \ + __re_set_registers (bu, re, nu, st, en) +# define re_match_2(bufp, string1, size1, string2, size2, pos, regs, stop) \ + __re_match_2 (bufp, string1, size1, string2, size2, pos, regs, stop) +# define re_match(bufp, string, size, pos, regs) \ + __re_match (bufp, string, size, pos, regs) +# define re_search(bufp, string, size, startpos, range, regs) \ + __re_search (bufp, string, size, startpos, range, regs) +# define re_compile_pattern(pattern, length, bufp) \ + __re_compile_pattern (pattern, length, bufp) +# define re_set_syntax(syntax) __re_set_syntax (syntax) +# define re_search_2(bufp, st1, s1, st2, s2, startpos, range, regs, stop) \ + __re_search_2 (bufp, st1, s1, st2, s2, startpos, range, regs, stop) +# define re_compile_fastmap(bufp) __re_compile_fastmap (bufp) + +# define btowc __btowc + +/* We are also using some library internals. */ +# include +# include +# include +# include +# endif + +/* This is for other GNU distributions with internationalized messages. */ +# if HAVE_LIBINTL_H || defined _LIBC +# include +# ifdef _LIBC +# undef gettext +# define gettext(msgid) __dcgettext ("libc", msgid, LC_MESSAGES) +# endif +# else +# define gettext(msgid) (msgid) +# endif + +# ifndef gettext_noop +/* This define is so xgettext can find the internationalizable + strings. */ +# define gettext_noop(String) String +# endif + +/* The `emacs' switch turns on certain matching commands + that make sense only in Emacs. */ +# ifdef emacs + +# include "lisp.h" +# include "buffer.h" +# include "syntax.h" + +# else /* not emacs */ + +/* If we are not linking with Emacs proper, + we can't use the relocating allocator + even if config.h says that we can. */ +# undef REL_ALLOC + +# if defined STDC_HEADERS || defined _LIBC +# include +# else +char *malloc (); +char *realloc (); +# endif + +/* When used in Emacs's lib-src, we need to get bzero and bcopy somehow. + If nothing else has been done, use the method below. */ +# ifdef INHIBIT_STRING_HEADER +# if !(defined HAVE_BZERO && defined HAVE_BCOPY) +# if !defined bzero && !defined bcopy +# undef INHIBIT_STRING_HEADER +# endif +# endif +# endif + +/* This is the normal way of making sure we have a bcopy and a bzero. + This is used in most programs--a few other programs avoid this + by defining INHIBIT_STRING_HEADER. */ +# ifndef INHIBIT_STRING_HEADER +# if defined HAVE_STRING_H || defined STDC_HEADERS || defined _LIBC +# include +# ifndef bzero +# ifndef _LIBC +# define bzero(s, n) (memset (s, '\0', n), (s)) +# else +# define bzero(s, n) __bzero (s, n) +# endif +# endif +# else +# include +# ifndef memcmp +# define memcmp(s1, s2, n) bcmp (s1, s2, n) +# endif +# ifndef memcpy +# define memcpy(d, s, n) (bcopy (s, d, n), (d)) +# endif +# endif +# endif + +/* Define the syntax stuff for \<, \>, etc. */ + +/* This must be nonzero for the wordchar and notwordchar pattern + commands in re_match_2. */ +# ifndef Sword +# define Sword 1 +# endif + +# ifdef SWITCH_ENUM_BUG +# define SWITCH_ENUM_CAST(x) ((int)(x)) +# else +# define SWITCH_ENUM_CAST(x) (x) +# endif + +# endif /* not emacs */ + +# if defined _LIBC || HAVE_LIMITS_H +# include +# endif + +# ifndef MB_LEN_MAX +# define MB_LEN_MAX 1 +# endif + +/* Get the interface, including the syntax bits. */ +# include + +/* isalpha etc. are used for the character classes. */ +# include + +/* Jim Meyering writes: + + "... Some ctype macros are valid only for character codes that + isascii says are ASCII (SGI's IRIX-4.0.5 is one such system --when + using /bin/cc or gcc but without giving an ansi option). So, all + ctype uses should be through macros like ISPRINT... If + STDC_HEADERS is defined, then autoconf has verified that the ctype + macros don't need to be guarded with references to isascii. ... + Defining isascii to 1 should let any compiler worth its salt + eliminate the && through constant folding." + Solaris defines some of these symbols so we must undefine them first. */ + +# undef ISASCII +# if defined STDC_HEADERS || (!defined isascii && !defined HAVE_ISASCII) +# define ISASCII(c) 1 +# else +# define ISASCII(c) isascii(c) +# endif + +# ifdef isblank +# define ISBLANK(c) (ISASCII (c) && isblank (c)) +# else +# define ISBLANK(c) ((c) == ' ' || (c) == '\t') +# endif +# ifdef isgraph +# define ISGRAPH(c) (ISASCII (c) && isgraph (c)) +# else +# define ISGRAPH(c) (ISASCII (c) && isprint (c) && !isspace (c)) +# endif + +# undef ISPRINT +# define ISPRINT(c) (ISASCII (c) && isprint (c)) +# define ISDIGIT(c) (ISASCII (c) && isdigit (c)) +# define ISALNUM(c) (ISASCII (c) && isalnum (c)) +# define ISALPHA(c) (ISASCII (c) && isalpha (c)) +# define ISCNTRL(c) (ISASCII (c) && iscntrl (c)) +# define ISLOWER(c) (ISASCII (c) && islower (c)) +# define ISPUNCT(c) (ISASCII (c) && ispunct (c)) +# define ISSPACE(c) (ISASCII (c) && isspace (c)) +# define ISUPPER(c) (ISASCII (c) && isupper (c)) +# define ISXDIGIT(c) (ISASCII (c) && isxdigit (c)) + +# ifdef _tolower +# define TOLOWER(c) _tolower(c) +# else +# define TOLOWER(c) tolower(c) +# endif + +# ifndef NULL +# define NULL (void *)0 +# endif + +/* We remove any previous definition of `SIGN_EXTEND_CHAR', + since ours (we hope) works properly with all combinations of + machines, compilers, `char' and `unsigned char' argument types. + (Per Bothner suggested the basic approach.) */ +# undef SIGN_EXTEND_CHAR +# if __STDC__ +# define SIGN_EXTEND_CHAR(c) ((signed char) (c)) +# else /* not __STDC__ */ +/* As in Harbison and Steele. */ +# define SIGN_EXTEND_CHAR(c) ((((unsigned char) (c)) ^ 128) - 128) +# endif + +# ifndef emacs +/* How many characters in the character set. */ +# define CHAR_SET_SIZE 256 + +# ifdef SYNTAX_TABLE + +extern char *re_syntax_table; + +# else /* not SYNTAX_TABLE */ + +static char re_syntax_table[CHAR_SET_SIZE]; + +static void init_syntax_once PARAMS ((void)); + +static void +init_syntax_once () +{ + register int c; + static int done = 0; + + if (done) + return; + bzero (re_syntax_table, sizeof re_syntax_table); + + for (c = 0; c < CHAR_SET_SIZE; ++c) + if (ISALNUM (c)) + re_syntax_table[c] = Sword; + + re_syntax_table['_'] = Sword; + + done = 1; +} + +# endif /* not SYNTAX_TABLE */ + +# define SYNTAX(c) re_syntax_table[(unsigned char) (c)] + +# endif /* emacs */ + +/* Integer type for pointers. */ +# if !defined _LIBC +typedef unsigned long int uintptr_t; +# endif + +/* Should we use malloc or alloca? If REGEX_MALLOC is not defined, we + use `alloca' instead of `malloc'. This is because using malloc in + re_search* or re_match* could cause memory leaks when C-g is used in + Emacs; also, malloc is slower and causes storage fragmentation. On + the other hand, malloc is more portable, and easier to debug. + + Because we sometimes use alloca, some routines have to be macros, + not functions -- `alloca'-allocated space disappears at the end of the + function it is called in. */ + +# ifdef REGEX_MALLOC + +# define REGEX_ALLOCATE malloc +# define REGEX_REALLOCATE(source, osize, nsize) realloc (source, nsize) +# define REGEX_FREE free + +# else /* not REGEX_MALLOC */ + +/* Emacs already defines alloca, sometimes. */ +# ifndef alloca + +/* Make alloca work the best possible way. */ +# ifdef __GNUC__ +# define alloca __builtin_alloca +# else /* not __GNUC__ */ +# if HAVE_ALLOCA_H +# include +# endif /* HAVE_ALLOCA_H */ +# endif /* not __GNUC__ */ + +# endif /* not alloca */ + +# define REGEX_ALLOCATE alloca + +/* Assumes a `char *destination' variable. */ +# define REGEX_REALLOCATE(source, osize, nsize) \ + (destination = (char *) alloca (nsize), \ + memcpy (destination, source, osize)) + +/* No need to do anything to free, after alloca. */ +# define REGEX_FREE(arg) ((void)0) /* Do nothing! But inhibit gcc warning. */ + +# endif /* not REGEX_MALLOC */ + +/* Define how to allocate the failure stack. */ + +# if defined REL_ALLOC && defined REGEX_MALLOC + +# define REGEX_ALLOCATE_STACK(size) \ + r_alloc (&failure_stack_ptr, (size)) +# define REGEX_REALLOCATE_STACK(source, osize, nsize) \ + r_re_alloc (&failure_stack_ptr, (nsize)) +# define REGEX_FREE_STACK(ptr) \ + r_alloc_free (&failure_stack_ptr) + +# else /* not using relocating allocator */ + +# ifdef REGEX_MALLOC + +# define REGEX_ALLOCATE_STACK malloc +# define REGEX_REALLOCATE_STACK(source, osize, nsize) realloc (source, nsize) +# define REGEX_FREE_STACK free + +# else /* not REGEX_MALLOC */ + +# define REGEX_ALLOCATE_STACK alloca + +# define REGEX_REALLOCATE_STACK(source, osize, nsize) \ + REGEX_REALLOCATE (source, osize, nsize) +/* No need to explicitly free anything. */ +# define REGEX_FREE_STACK(arg) + +# endif /* not REGEX_MALLOC */ +# endif /* not using relocating allocator */ + + +/* True if `size1' is non-NULL and PTR is pointing anywhere inside + `string1' or just past its end. This works if PTR is NULL, which is + a good thing. */ +# define FIRST_STRING_P(ptr) \ + (size1 && string1 <= (ptr) && (ptr) <= string1 + size1) + +/* (Re)Allocate N items of type T using malloc, or fail. */ +# define TALLOC(n, t) ((t *) malloc ((n) * sizeof (t))) +# define RETALLOC(addr, n, t) ((addr) = (t *) realloc (addr, (n) * sizeof (t))) +# define RETALLOC_IF(addr, n, t) \ + if (addr) RETALLOC((addr), (n), t); else (addr) = TALLOC ((n), t) +# define REGEX_TALLOC(n, t) ((t *) REGEX_ALLOCATE ((n) * sizeof (t))) + +# define BYTEWIDTH 8 /* In bits. */ + +# define STREQ(s1, s2) ((strcmp (s1, s2) == 0)) + +# undef MAX +# undef MIN +# define MAX(a, b) ((a) > (b) ? (a) : (b)) +# define MIN(a, b) ((a) < (b) ? (a) : (b)) + +typedef char boolean; +# define false 0 +# define true 1 + +static reg_errcode_t byte_regex_compile _RE_ARGS ((const char *pattern, size_t size, + reg_syntax_t syntax, + struct re_pattern_buffer *bufp)); + +static int byte_re_match_2_internal PARAMS ((struct re_pattern_buffer *bufp, + const char *string1, int size1, + const char *string2, int size2, + int pos, + struct re_registers *regs, + int stop)); +static int byte_re_search_2 PARAMS ((struct re_pattern_buffer *bufp, + const char *string1, int size1, + const char *string2, int size2, + int startpos, int range, + struct re_registers *regs, int stop)); +static int byte_re_compile_fastmap PARAMS ((struct re_pattern_buffer *bufp)); + +#ifdef MBS_SUPPORT +static reg_errcode_t wcs_regex_compile _RE_ARGS ((const char *pattern, size_t size, + reg_syntax_t syntax, + struct re_pattern_buffer *bufp)); + + +static int wcs_re_match_2_internal PARAMS ((struct re_pattern_buffer *bufp, + const char *cstring1, int csize1, + const char *cstring2, int csize2, + int pos, + struct re_registers *regs, + int stop, + wchar_t *string1, int size1, + wchar_t *string2, int size2, + int *mbs_offset1, int *mbs_offset2)); +static int wcs_re_search_2 PARAMS ((struct re_pattern_buffer *bufp, + const char *string1, int size1, + const char *string2, int size2, + int startpos, int range, + struct re_registers *regs, int stop)); +static int wcs_re_compile_fastmap PARAMS ((struct re_pattern_buffer *bufp)); +#endif + +/* These are the command codes that appear in compiled regular + expressions. Some opcodes are followed by argument bytes. A + command code can specify any interpretation whatsoever for its + arguments. Zero bytes may appear in the compiled regular expression. */ + +typedef enum +{ + no_op = 0, + + /* Succeed right away--no more backtracking. */ + succeed, + + /* Followed by one byte giving n, then by n literal bytes. */ + exactn, + +# ifdef MBS_SUPPORT + /* Same as exactn, but contains binary data. */ + exactn_bin, +# endif + + /* Matches any (more or less) character. */ + anychar, + + /* Matches any one char belonging to specified set. First + following byte is number of bitmap bytes. Then come bytes + for a bitmap saying which chars are in. Bits in each byte + are ordered low-bit-first. A character is in the set if its + bit is 1. A character too large to have a bit in the map is + automatically not in the set. */ + /* ifdef MBS_SUPPORT, following element is length of character + classes, length of collating symbols, length of equivalence + classes, length of character ranges, and length of characters. + Next, character class element, collating symbols elements, + equivalence class elements, range elements, and character + elements follow. + See regex_compile function. */ + charset, + + /* Same parameters as charset, but match any character that is + not one of those specified. */ + charset_not, + + /* Start remembering the text that is matched, for storing in a + register. Followed by one byte with the register number, in + the range 0 to one less than the pattern buffer's re_nsub + field. Then followed by one byte with the number of groups + inner to this one. (This last has to be part of the + start_memory only because we need it in the on_failure_jump + of re_match_2.) */ + start_memory, + + /* Stop remembering the text that is matched and store it in a + memory register. Followed by one byte with the register + number, in the range 0 to one less than `re_nsub' in the + pattern buffer, and one byte with the number of inner groups, + just like `start_memory'. (We need the number of inner + groups here because we don't have any easy way of finding the + corresponding start_memory when we're at a stop_memory.) */ + stop_memory, + + /* Match a duplicate of something remembered. Followed by one + byte containing the register number. */ + duplicate, + + /* Fail unless at beginning of line. */ + begline, + + /* Fail unless at end of line. */ + endline, + + /* Succeeds if at beginning of buffer (if emacs) or at beginning + of string to be matched (if not). */ + begbuf, + + /* Analogously, for end of buffer/string. */ + endbuf, + + /* Followed by two byte relative address to which to jump. */ + jump, + + /* Same as jump, but marks the end of an alternative. */ + jump_past_alt, + + /* Followed by two-byte relative address of place to resume at + in case of failure. */ + /* ifdef MBS_SUPPORT, the size of address is 1. */ + on_failure_jump, + + /* Like on_failure_jump, but pushes a placeholder instead of the + current string position when executed. */ + on_failure_keep_string_jump, + + /* Throw away latest failure point and then jump to following + two-byte relative address. */ + /* ifdef MBS_SUPPORT, the size of address is 1. */ + pop_failure_jump, + + /* Change to pop_failure_jump if know won't have to backtrack to + match; otherwise change to jump. This is used to jump + back to the beginning of a repeat. If what follows this jump + clearly won't match what the repeat does, such that we can be + sure that there is no use backtracking out of repetitions + already matched, then we change it to a pop_failure_jump. + Followed by two-byte address. */ + /* ifdef MBS_SUPPORT, the size of address is 1. */ + maybe_pop_jump, + + /* Jump to following two-byte address, and push a dummy failure + point. This failure point will be thrown away if an attempt + is made to use it for a failure. A `+' construct makes this + before the first repeat. Also used as an intermediary kind + of jump when compiling an alternative. */ + /* ifdef MBS_SUPPORT, the size of address is 1. */ + dummy_failure_jump, + + /* Push a dummy failure point and continue. Used at the end of + alternatives. */ + push_dummy_failure, + + /* Followed by two-byte relative address and two-byte number n. + After matching N times, jump to the address upon failure. */ + /* ifdef MBS_SUPPORT, the size of address is 1. */ + succeed_n, + + /* Followed by two-byte relative address, and two-byte number n. + Jump to the address N times, then fail. */ + /* ifdef MBS_SUPPORT, the size of address is 1. */ + jump_n, + + /* Set the following two-byte relative address to the + subsequent two-byte number. The address *includes* the two + bytes of number. */ + /* ifdef MBS_SUPPORT, the size of address is 1. */ + set_number_at, + + wordchar, /* Matches any word-constituent character. */ + notwordchar, /* Matches any char that is not a word-constituent. */ + + wordbeg, /* Succeeds if at word beginning. */ + wordend, /* Succeeds if at word end. */ + + wordbound, /* Succeeds if at a word boundary. */ + notwordbound /* Succeeds if not at a word boundary. */ + +# ifdef emacs + ,before_dot, /* Succeeds if before point. */ + at_dot, /* Succeeds if at point. */ + after_dot, /* Succeeds if after point. */ + + /* Matches any character whose syntax is specified. Followed by + a byte which contains a syntax code, e.g., Sword. */ + syntaxspec, + + /* Matches any character whose syntax is not that specified. */ + notsyntaxspec +# endif /* emacs */ +} re_opcode_t; +#endif /* not INSIDE_RECURSION */ + + +#ifdef BYTE +# define CHAR_T char +# define UCHAR_T unsigned char +# define COMPILED_BUFFER_VAR bufp->buffer +# define OFFSET_ADDRESS_SIZE 2 +# define PREFIX(name) byte_##name +# define ARG_PREFIX(name) name +# define PUT_CHAR(c) putchar (c) +#else +# ifdef WCHAR +# define CHAR_T wchar_t +# define UCHAR_T wchar_t +# define COMPILED_BUFFER_VAR wc_buffer +# define OFFSET_ADDRESS_SIZE 1 /* the size which STORE_NUMBER macro use */ +# define CHAR_CLASS_SIZE ((__alignof__(wctype_t)+sizeof(wctype_t))/sizeof(CHAR_T)+1) +# define PREFIX(name) wcs_##name +# define ARG_PREFIX(name) c##name +/* Should we use wide stream?? */ +# define PUT_CHAR(c) printf ("%C", c); +# define TRUE 1 +# define FALSE 0 +# else +# ifdef MBS_SUPPORT +# define WCHAR +# define INSIDE_RECURSION +# include "regex_old.c" +# undef INSIDE_RECURSION +# endif +# define BYTE +# define INSIDE_RECURSION +# include "regex_old.c" +# undef INSIDE_RECURSION +# endif +#endif + +#ifdef INSIDE_RECURSION +/* Common operations on the compiled pattern. */ + +/* Store NUMBER in two contiguous bytes starting at DESTINATION. */ +/* ifdef MBS_SUPPORT, we store NUMBER in 1 element. */ + +# ifdef WCHAR +# define STORE_NUMBER(destination, number) \ + do { \ + *(destination) = (UCHAR_T)(number); \ + } while (0) +# else /* BYTE */ +# define STORE_NUMBER(destination, number) \ + do { \ + (destination)[0] = (number) & 0377; \ + (destination)[1] = (number) >> 8; \ + } while (0) +# endif /* WCHAR */ + +/* Same as STORE_NUMBER, except increment DESTINATION to + the byte after where the number is stored. Therefore, DESTINATION + must be an lvalue. */ +/* ifdef MBS_SUPPORT, we store NUMBER in 1 element. */ + +# define STORE_NUMBER_AND_INCR(destination, number) \ + do { \ + STORE_NUMBER (destination, number); \ + (destination) += OFFSET_ADDRESS_SIZE; \ + } while (0) + +/* Put into DESTINATION a number stored in two contiguous bytes starting + at SOURCE. */ +/* ifdef MBS_SUPPORT, we store NUMBER in 1 element. */ + +# ifdef WCHAR +# define EXTRACT_NUMBER(destination, source) \ + do { \ + (destination) = *(source); \ + } while (0) +# else /* BYTE */ +# define EXTRACT_NUMBER(destination, source) \ + do { \ + (destination) = *(source) & 0377; \ + (destination) += SIGN_EXTEND_CHAR (*((source) + 1)) << 8; \ + } while (0) +# endif + +# ifdef DEBUG +static void PREFIX(extract_number) _RE_ARGS ((int *dest, UCHAR_T *source)); +static void +PREFIX(extract_number) (dest, source) + int *dest; + UCHAR_T *source; +{ +# ifdef WCHAR + *dest = *source; +# else /* BYTE */ + int temp = SIGN_EXTEND_CHAR (*(source + 1)); + *dest = *source & 0377; + *dest += temp << 8; +# endif +} + +# ifndef EXTRACT_MACROS /* To debug the macros. */ +# undef EXTRACT_NUMBER +# define EXTRACT_NUMBER(dest, src) PREFIX(extract_number) (&dest, src) +# endif /* not EXTRACT_MACROS */ + +# endif /* DEBUG */ + +/* Same as EXTRACT_NUMBER, except increment SOURCE to after the number. + SOURCE must be an lvalue. */ + +# define EXTRACT_NUMBER_AND_INCR(destination, source) \ + do { \ + EXTRACT_NUMBER (destination, source); \ + (source) += OFFSET_ADDRESS_SIZE; \ + } while (0) + +# ifdef DEBUG +static void PREFIX(extract_number_and_incr) _RE_ARGS ((int *destination, + UCHAR_T **source)); +static void +PREFIX(extract_number_and_incr) (destination, source) + int *destination; + UCHAR_T **source; +{ + PREFIX(extract_number) (destination, *source); + *source += OFFSET_ADDRESS_SIZE; +} + +# ifndef EXTRACT_MACROS +# undef EXTRACT_NUMBER_AND_INCR +# define EXTRACT_NUMBER_AND_INCR(dest, src) \ + PREFIX(extract_number_and_incr) (&dest, &src) +# endif /* not EXTRACT_MACROS */ + +# endif /* DEBUG */ + + + +/* If DEBUG is defined, Regex prints many voluminous messages about what + it is doing (if the variable `debug' is nonzero). If linked with the + main program in `iregex.c', you can enter patterns and strings + interactively. And if linked with the main program in `main.c' and + the other test files, you can run the already-written tests. */ + +# ifdef DEBUG + +# ifndef DEFINED_ONCE + +/* We use standard I/O for debugging. */ +# include + +/* It is useful to test things that ``must'' be true when debugging. */ +# include + +static int debug; + +# define DEBUG_STATEMENT(e) e +# define DEBUG_PRINT1(x) if (debug) printf (x) +# define DEBUG_PRINT2(x1, x2) if (debug) printf (x1, x2) +# define DEBUG_PRINT3(x1, x2, x3) if (debug) printf (x1, x2, x3) +# define DEBUG_PRINT4(x1, x2, x3, x4) if (debug) printf (x1, x2, x3, x4) +# endif /* not DEFINED_ONCE */ + +# define DEBUG_PRINT_COMPILED_PATTERN(p, s, e) \ + if (debug) PREFIX(print_partial_compiled_pattern) (s, e) +# define DEBUG_PRINT_DOUBLE_STRING(w, s1, sz1, s2, sz2) \ + if (debug) PREFIX(print_double_string) (w, s1, sz1, s2, sz2) + + +/* Print the fastmap in human-readable form. */ + +# ifndef DEFINED_ONCE +void +print_fastmap (fastmap) + char *fastmap; +{ + unsigned was_a_range = 0; + unsigned i = 0; + + while (i < (1 << BYTEWIDTH)) + { + if (fastmap[i++]) + { + was_a_range = 0; + putchar (i - 1); + while (i < (1 << BYTEWIDTH) && fastmap[i]) + { + was_a_range = 1; + i++; + } + if (was_a_range) + { + printf ("-"); + putchar (i - 1); + } + } + } + putchar ('\n'); +} +# endif /* not DEFINED_ONCE */ + + +/* Print a compiled pattern string in human-readable form, starting at + the START pointer into it and ending just before the pointer END. */ + +void +PREFIX(print_partial_compiled_pattern) (start, end) + UCHAR_T *start; + UCHAR_T *end; +{ + int mcnt, mcnt2; + UCHAR_T *p1; + UCHAR_T *p = start; + UCHAR_T *pend = end; + + if (start == NULL) + { + printf ("(null)\n"); + return; + } + + /* Loop over pattern commands. */ + while (p < pend) + { +# ifdef _LIBC + printf ("%td:\t", p - start); +# else + printf ("%ld:\t", (long int) (p - start)); +# endif + + switch ((re_opcode_t) *p++) + { + case no_op: + printf ("/no_op"); + break; + + case exactn: + mcnt = *p++; + printf ("/exactn/%d", mcnt); + do + { + putchar ('/'); + PUT_CHAR (*p++); + } + while (--mcnt); + break; + +# ifdef MBS_SUPPORT + case exactn_bin: + mcnt = *p++; + printf ("/exactn_bin/%d", mcnt); + do + { + printf("/%lx", (long int) *p++); + } + while (--mcnt); + break; +# endif /* MBS_SUPPORT */ + + case start_memory: + mcnt = *p++; + printf ("/start_memory/%d/%ld", mcnt, (long int) *p++); + break; + + case stop_memory: + mcnt = *p++; + printf ("/stop_memory/%d/%ld", mcnt, (long int) *p++); + break; + + case duplicate: + printf ("/duplicate/%ld", (long int) *p++); + break; + + case anychar: + printf ("/anychar"); + break; + + case charset: + case charset_not: + { +# ifdef WCHAR + int i, length; + wchar_t *workp = p; + printf ("/charset [%s", + (re_opcode_t) *(workp - 1) == charset_not ? "^" : ""); + p += 5; + length = *workp++; /* the length of char_classes */ + for (i=0 ; ibuffer; + + PREFIX(print_partial_compiled_pattern) (buffer, buffer + + bufp->used / sizeof(UCHAR_T)); + printf ("%ld bytes used/%ld bytes allocated.\n", + bufp->used, bufp->allocated); + + if (bufp->fastmap_accurate && bufp->fastmap) + { + printf ("fastmap: "); + print_fastmap (bufp->fastmap); + } + +# ifdef _LIBC + printf ("re_nsub: %Zd\t", bufp->re_nsub); +# else + printf ("re_nsub: %ld\t", (long int) bufp->re_nsub); +# endif + printf ("regs_alloc: %d\t", bufp->regs_allocated); + printf ("can_be_null: %d\t", bufp->can_be_null); + printf ("newline_anchor: %d\n", bufp->newline_anchor); + printf ("no_sub: %d\t", bufp->no_sub); + printf ("not_bol: %d\t", bufp->not_bol); + printf ("not_eol: %d\t", bufp->not_eol); + printf ("syntax: %lx\n", bufp->syntax); + /* Perhaps we should print the translate table? */ +} + + +void +PREFIX(print_double_string) (where, string1, size1, string2, size2) + const CHAR_T *where; + const CHAR_T *string1; + const CHAR_T *string2; + int size1; + int size2; +{ + int this_char; + + if (where == NULL) + printf ("(null)"); + else + { + int cnt; + + if (FIRST_STRING_P (where)) + { + for (this_char = where - string1; this_char < size1; this_char++) + PUT_CHAR (string1[this_char]); + + where = string2; + } + + cnt = 0; + for (this_char = where - string2; this_char < size2; this_char++) + { + PUT_CHAR (string2[this_char]); + if (++cnt > 100) + { + fputs ("...", stdout); + break; + } + } + } +} + +# ifndef DEFINED_ONCE +void +printchar (c) + int c; +{ + putc (c, stderr); +} +# endif + +# else /* not DEBUG */ + +# ifndef DEFINED_ONCE +# undef assert +# define assert(e) + +# define DEBUG_STATEMENT(e) +# define DEBUG_PRINT1(x) +# define DEBUG_PRINT2(x1, x2) +# define DEBUG_PRINT3(x1, x2, x3) +# define DEBUG_PRINT4(x1, x2, x3, x4) +# endif /* not DEFINED_ONCE */ +# define DEBUG_PRINT_COMPILED_PATTERN(p, s, e) +# define DEBUG_PRINT_DOUBLE_STRING(w, s1, sz1, s2, sz2) + +# endif /* not DEBUG */ + + + +# ifdef WCHAR +/* This convert a multibyte string to a wide character string. + And write their correspondances to offset_buffer(see below) + and write whether each wchar_t is binary data to is_binary. + This assume invalid multibyte sequences as binary data. + We assume offset_buffer and is_binary is already allocated + enough space. */ + +static size_t convert_mbs_to_wcs (CHAR_T *dest, const unsigned char* src, + size_t len, int *offset_buffer, + char *is_binary); +static size_t +convert_mbs_to_wcs (dest, src, len, offset_buffer, is_binary) + CHAR_T *dest; + const unsigned char* src; + size_t len; /* the length of multibyte string. */ + + /* It hold correspondances between src(char string) and + dest(wchar_t string) for optimization. + e.g. src = "xxxyzz" + dest = {'X', 'Y', 'Z'} + (each "xxx", "y" and "zz" represent one multibyte character + corresponding to 'X', 'Y' and 'Z'.) + offset_buffer = {0, 0+3("xxx"), 0+3+1("y"), 0+3+1+2("zz")} + = {0, 3, 4, 6} + */ + int *offset_buffer; + char *is_binary; +{ + wchar_t *pdest = dest; + const unsigned char *psrc = src; + size_t wc_count = 0; + + mbstate_t mbs; + int i, consumed; + size_t mb_remain = len; + size_t mb_count = 0; + + /* Initialize the conversion state. */ + memset (&mbs, 0, sizeof (mbstate_t)); + + offset_buffer[0] = 0; + for( ; mb_remain > 0 ; ++wc_count, ++pdest, mb_remain -= consumed, + psrc += consumed) + { +#ifdef _LIBC + consumed = __mbrtowc (pdest, psrc, mb_remain, &mbs); +#else + consumed = mbrtowc (pdest, psrc, mb_remain, &mbs); +#endif + + if (consumed <= 0) + /* failed to convert. maybe src contains binary data. + So we consume 1 byte manualy. */ + { + *pdest = *psrc; + consumed = 1; + is_binary[wc_count] = TRUE; + } + else + is_binary[wc_count] = FALSE; + /* In sjis encoding, we use yen sign as escape character in + place of reverse solidus. So we convert 0x5c(yen sign in + sjis) to not 0xa5(yen sign in UCS2) but 0x5c(reverse + solidus in UCS2). */ + if (consumed == 1 && (int) *psrc == 0x5c && (int) *pdest == 0xa5) + *pdest = (wchar_t) *psrc; + + offset_buffer[wc_count + 1] = mb_count += consumed; + } + + /* Fill remain of the buffer with sentinel. */ + for (i = wc_count + 1 ; i <= len ; i++) + offset_buffer[i] = mb_count + 1; + + return wc_count; +} + +# endif /* WCHAR */ + +#else /* not INSIDE_RECURSION */ + +/* Set by `re_set_syntax' to the current regexp syntax to recognize. Can + also be assigned to arbitrarily: each pattern buffer stores its own + syntax, so it can be changed between regex compilations. */ +/* This has no initializer because initialized variables in Emacs + become read-only after dumping. */ +reg_syntax_t re_syntax_options; + + +/* Specify the precise syntax of regexps for compilation. This provides + for compatibility for various utilities which historically have + different, incompatible syntaxes. + + The argument SYNTAX is a bit mask comprised of the various bits + defined in regex.h. We return the old syntax. */ + +reg_syntax_t +re_set_syntax (syntax) + reg_syntax_t syntax; +{ + reg_syntax_t ret = re_syntax_options; + + re_syntax_options = syntax; +# ifdef DEBUG + if (syntax & RE_DEBUG) + debug = 1; + else if (debug) /* was on but now is not */ + debug = 0; +# endif /* DEBUG */ + return ret; +} +# ifdef _LIBC +weak_alias (__re_set_syntax, re_set_syntax) +# endif + +/* This table gives an error message for each of the error codes listed + in regex.h. Obviously the order here has to be same as there. + POSIX doesn't require that we do anything for REG_NOERROR, + but why not be nice? */ + +static const char re_error_msgid[] = + { +# define REG_NOERROR_IDX 0 + gettext_noop ("Success") /* REG_NOERROR */ + "\0" +# define REG_NOMATCH_IDX (REG_NOERROR_IDX + sizeof "Success") + gettext_noop ("No match") /* REG_NOMATCH */ + "\0" +# define REG_BADPAT_IDX (REG_NOMATCH_IDX + sizeof "No match") + gettext_noop ("Invalid regular expression") /* REG_BADPAT */ + "\0" +# define REG_ECOLLATE_IDX (REG_BADPAT_IDX + sizeof "Invalid regular expression") + gettext_noop ("Invalid collation character") /* REG_ECOLLATE */ + "\0" +# define REG_ECTYPE_IDX (REG_ECOLLATE_IDX + sizeof "Invalid collation character") + gettext_noop ("Invalid character class name") /* REG_ECTYPE */ + "\0" +# define REG_EESCAPE_IDX (REG_ECTYPE_IDX + sizeof "Invalid character class name") + gettext_noop ("Trailing backslash") /* REG_EESCAPE */ + "\0" +# define REG_ESUBREG_IDX (REG_EESCAPE_IDX + sizeof "Trailing backslash") + gettext_noop ("Invalid back reference") /* REG_ESUBREG */ + "\0" +# define REG_EBRACK_IDX (REG_ESUBREG_IDX + sizeof "Invalid back reference") + gettext_noop ("Unmatched [ or [^") /* REG_EBRACK */ + "\0" +# define REG_EPAREN_IDX (REG_EBRACK_IDX + sizeof "Unmatched [ or [^") + gettext_noop ("Unmatched ( or \\(") /* REG_EPAREN */ + "\0" +# define REG_EBRACE_IDX (REG_EPAREN_IDX + sizeof "Unmatched ( or \\(") + gettext_noop ("Unmatched \\{") /* REG_EBRACE */ + "\0" +# define REG_BADBR_IDX (REG_EBRACE_IDX + sizeof "Unmatched \\{") + gettext_noop ("Invalid content of \\{\\}") /* REG_BADBR */ + "\0" +# define REG_ERANGE_IDX (REG_BADBR_IDX + sizeof "Invalid content of \\{\\}") + gettext_noop ("Invalid range end") /* REG_ERANGE */ + "\0" +# define REG_ESPACE_IDX (REG_ERANGE_IDX + sizeof "Invalid range end") + gettext_noop ("Memory exhausted") /* REG_ESPACE */ + "\0" +# define REG_BADRPT_IDX (REG_ESPACE_IDX + sizeof "Memory exhausted") + gettext_noop ("Invalid preceding regular expression") /* REG_BADRPT */ + "\0" +# define REG_EEND_IDX (REG_BADRPT_IDX + sizeof "Invalid preceding regular expression") + gettext_noop ("Premature end of regular expression") /* REG_EEND */ + "\0" +# define REG_ESIZE_IDX (REG_EEND_IDX + sizeof "Premature end of regular expression") + gettext_noop ("Regular expression too big") /* REG_ESIZE */ + "\0" +# define REG_ERPAREN_IDX (REG_ESIZE_IDX + sizeof "Regular expression too big") + gettext_noop ("Unmatched ) or \\)") /* REG_ERPAREN */ + }; + +static const size_t re_error_msgid_idx[] = + { + REG_NOERROR_IDX, + REG_NOMATCH_IDX, + REG_BADPAT_IDX, + REG_ECOLLATE_IDX, + REG_ECTYPE_IDX, + REG_EESCAPE_IDX, + REG_ESUBREG_IDX, + REG_EBRACK_IDX, + REG_EPAREN_IDX, + REG_EBRACE_IDX, + REG_BADBR_IDX, + REG_ERANGE_IDX, + REG_ESPACE_IDX, + REG_BADRPT_IDX, + REG_EEND_IDX, + REG_ESIZE_IDX, + REG_ERPAREN_IDX + }; + +#endif /* INSIDE_RECURSION */ + +#ifndef DEFINED_ONCE +/* Avoiding alloca during matching, to placate r_alloc. */ + +/* Define MATCH_MAY_ALLOCATE unless we need to make sure that the + searching and matching functions should not call alloca. On some + systems, alloca is implemented in terms of malloc, and if we're + using the relocating allocator routines, then malloc could cause a + relocation, which might (if the strings being searched are in the + ralloc heap) shift the data out from underneath the regexp + routines. + + Here's another reason to avoid allocation: Emacs + processes input from X in a signal handler; processing X input may + call malloc; if input arrives while a matching routine is calling + malloc, then we're scrod. But Emacs can't just block input while + calling matching routines; then we don't notice interrupts when + they come in. So, Emacs blocks input around all regexp calls + except the matching calls, which it leaves unprotected, in the + faith that they will not malloc. */ + +/* Normally, this is fine. */ +# define MATCH_MAY_ALLOCATE + +/* When using GNU C, we are not REALLY using the C alloca, no matter + what config.h may say. So don't take precautions for it. */ +# ifdef __GNUC__ +# undef C_ALLOCA +# endif + +/* The match routines may not allocate if (1) they would do it with malloc + and (2) it's not safe for them to use malloc. + Note that if REL_ALLOC is defined, matching would not use malloc for the + failure stack, but we would still use it for the register vectors; + so REL_ALLOC should not affect this. */ +# if (defined C_ALLOCA || defined REGEX_MALLOC) && defined emacs +# undef MATCH_MAY_ALLOCATE +# endif +#endif /* not DEFINED_ONCE */ + +#ifdef INSIDE_RECURSION +/* Failure stack declarations and macros; both re_compile_fastmap and + re_match_2 use a failure stack. These have to be macros because of + REGEX_ALLOCATE_STACK. */ + + +/* Number of failure points for which to initially allocate space + when matching. If this number is exceeded, we allocate more + space, so it is not a hard limit. */ +# ifndef INIT_FAILURE_ALLOC +# define INIT_FAILURE_ALLOC 5 +# endif + +/* Roughly the maximum number of failure points on the stack. Would be + exactly that if always used MAX_FAILURE_ITEMS items each time we failed. + This is a variable only so users of regex can assign to it; we never + change it ourselves. */ + +# ifdef INT_IS_16BIT + +# ifndef DEFINED_ONCE +# if defined MATCH_MAY_ALLOCATE +/* 4400 was enough to cause a crash on Alpha OSF/1, + whose default stack limit is 2mb. */ +long int re_max_failures = 4000; +# else +long int re_max_failures = 2000; +# endif +# endif + +union PREFIX(fail_stack_elt) +{ + UCHAR_T *pointer; + long int integer; +}; + +typedef union PREFIX(fail_stack_elt) PREFIX(fail_stack_elt_t); + +typedef struct +{ + PREFIX(fail_stack_elt_t) *stack; + unsigned long int size; + unsigned long int avail; /* Offset of next open position. */ +} PREFIX(fail_stack_type); + +# else /* not INT_IS_16BIT */ + +# ifndef DEFINED_ONCE +# if defined MATCH_MAY_ALLOCATE +/* 4400 was enough to cause a crash on Alpha OSF/1, + whose default stack limit is 2mb. */ +int re_max_failures = 4000; +# else +int re_max_failures = 2000; +# endif +# endif + +union PREFIX(fail_stack_elt) +{ + UCHAR_T *pointer; + int integer; +}; + +typedef union PREFIX(fail_stack_elt) PREFIX(fail_stack_elt_t); + +typedef struct +{ + PREFIX(fail_stack_elt_t) *stack; + unsigned size; + unsigned avail; /* Offset of next open position. */ +} PREFIX(fail_stack_type); + +# endif /* INT_IS_16BIT */ + +# ifndef DEFINED_ONCE +# define FAIL_STACK_EMPTY() (fail_stack.avail == 0) +# define FAIL_STACK_PTR_EMPTY() (fail_stack_ptr->avail == 0) +# define FAIL_STACK_FULL() (fail_stack.avail == fail_stack.size) +# endif + + +/* Define macros to initialize and free the failure stack. + Do `return -2' if the alloc fails. */ + +# ifdef MATCH_MAY_ALLOCATE +# define INIT_FAIL_STACK() \ + do { \ + fail_stack.stack = (PREFIX(fail_stack_elt_t) *) \ + REGEX_ALLOCATE_STACK (INIT_FAILURE_ALLOC * sizeof (PREFIX(fail_stack_elt_t))); \ + \ + if (fail_stack.stack == NULL) \ + return -2; \ + \ + fail_stack.size = INIT_FAILURE_ALLOC; \ + fail_stack.avail = 0; \ + } while (0) + +# define RESET_FAIL_STACK() REGEX_FREE_STACK (fail_stack.stack) +# else +# define INIT_FAIL_STACK() \ + do { \ + fail_stack.avail = 0; \ + } while (0) + +# define RESET_FAIL_STACK() +# endif + + +/* Double the size of FAIL_STACK, up to approximately `re_max_failures' items. + + Return 1 if succeeds, and 0 if either ran out of memory + allocating space for it or it was already too large. + + REGEX_REALLOCATE_STACK requires `destination' be declared. */ + +# define DOUBLE_FAIL_STACK(fail_stack) \ + ((fail_stack).size > (unsigned) (re_max_failures * MAX_FAILURE_ITEMS) \ + ? 0 \ + : ((fail_stack).stack = (PREFIX(fail_stack_elt_t) *) \ + REGEX_REALLOCATE_STACK ((fail_stack).stack, \ + (fail_stack).size * sizeof (PREFIX(fail_stack_elt_t)), \ + ((fail_stack).size << 1) * sizeof (PREFIX(fail_stack_elt_t))),\ + \ + (fail_stack).stack == NULL \ + ? 0 \ + : ((fail_stack).size <<= 1, \ + 1))) + + +/* Push pointer POINTER on FAIL_STACK. + Return 1 if was able to do so and 0 if ran out of memory allocating + space to do so. */ +# define PUSH_PATTERN_OP(POINTER, FAIL_STACK) \ + ((FAIL_STACK_FULL () \ + && !DOUBLE_FAIL_STACK (FAIL_STACK)) \ + ? 0 \ + : ((FAIL_STACK).stack[(FAIL_STACK).avail++].pointer = POINTER, \ + 1)) + +/* Push a pointer value onto the failure stack. + Assumes the variable `fail_stack'. Probably should only + be called from within `PUSH_FAILURE_POINT'. */ +# define PUSH_FAILURE_POINTER(item) \ + fail_stack.stack[fail_stack.avail++].pointer = (UCHAR_T *) (item) + +/* This pushes an integer-valued item onto the failure stack. + Assumes the variable `fail_stack'. Probably should only + be called from within `PUSH_FAILURE_POINT'. */ +# define PUSH_FAILURE_INT(item) \ + fail_stack.stack[fail_stack.avail++].integer = (item) + +/* Push a fail_stack_elt_t value onto the failure stack. + Assumes the variable `fail_stack'. Probably should only + be called from within `PUSH_FAILURE_POINT'. */ +# define PUSH_FAILURE_ELT(item) \ + fail_stack.stack[fail_stack.avail++] = (item) + +/* These three POP... operations complement the three PUSH... operations. + All assume that `fail_stack' is nonempty. */ +# define POP_FAILURE_POINTER() fail_stack.stack[--fail_stack.avail].pointer +# define POP_FAILURE_INT() fail_stack.stack[--fail_stack.avail].integer +# define POP_FAILURE_ELT() fail_stack.stack[--fail_stack.avail] + +/* Used to omit pushing failure point id's when we're not debugging. */ +# ifdef DEBUG +# define DEBUG_PUSH PUSH_FAILURE_INT +# define DEBUG_POP(item_addr) *(item_addr) = POP_FAILURE_INT () +# else +# define DEBUG_PUSH(item) +# define DEBUG_POP(item_addr) +# endif + + +/* Push the information about the state we will need + if we ever fail back to it. + + Requires variables fail_stack, regstart, regend, reg_info, and + num_regs_pushed be declared. DOUBLE_FAIL_STACK requires `destination' + be declared. + + Does `return FAILURE_CODE' if runs out of memory. */ + +# define PUSH_FAILURE_POINT(pattern_place, string_place, failure_code) \ + do { \ + char *destination; \ + /* Must be int, so when we don't save any registers, the arithmetic \ + of 0 + -1 isn't done as unsigned. */ \ + /* Can't be int, since there is not a shred of a guarantee that int \ + is wide enough to hold a value of something to which pointer can \ + be assigned */ \ + active_reg_t this_reg; \ + \ + DEBUG_STATEMENT (failure_id++); \ + DEBUG_STATEMENT (nfailure_points_pushed++); \ + DEBUG_PRINT2 ("\nPUSH_FAILURE_POINT #%u:\n", failure_id); \ + DEBUG_PRINT2 (" Before push, next avail: %d\n", (fail_stack).avail);\ + DEBUG_PRINT2 (" size: %d\n", (fail_stack).size);\ + \ + DEBUG_PRINT2 (" slots needed: %ld\n", NUM_FAILURE_ITEMS); \ + DEBUG_PRINT2 (" available: %d\n", REMAINING_AVAIL_SLOTS); \ + \ + /* Ensure we have enough space allocated for what we will push. */ \ + while (REMAINING_AVAIL_SLOTS < NUM_FAILURE_ITEMS) \ + { \ + if (!DOUBLE_FAIL_STACK (fail_stack)) \ + return failure_code; \ + \ + DEBUG_PRINT2 ("\n Doubled stack; size now: %d\n", \ + (fail_stack).size); \ + DEBUG_PRINT2 (" slots available: %d\n", REMAINING_AVAIL_SLOTS);\ + } \ + \ + /* Push the info, starting with the registers. */ \ + DEBUG_PRINT1 ("\n"); \ + \ + if (1) \ + for (this_reg = lowest_active_reg; this_reg <= highest_active_reg; \ + this_reg++) \ + { \ + DEBUG_PRINT2 (" Pushing reg: %lu\n", this_reg); \ + DEBUG_STATEMENT (num_regs_pushed++); \ + \ + DEBUG_PRINT2 (" start: %p\n", regstart[this_reg]); \ + PUSH_FAILURE_POINTER (regstart[this_reg]); \ + \ + DEBUG_PRINT2 (" end: %p\n", regend[this_reg]); \ + PUSH_FAILURE_POINTER (regend[this_reg]); \ + \ + DEBUG_PRINT2 (" info: %p\n ", \ + reg_info[this_reg].word.pointer); \ + DEBUG_PRINT2 (" match_null=%d", \ + REG_MATCH_NULL_STRING_P (reg_info[this_reg])); \ + DEBUG_PRINT2 (" active=%d", IS_ACTIVE (reg_info[this_reg])); \ + DEBUG_PRINT2 (" matched_something=%d", \ + MATCHED_SOMETHING (reg_info[this_reg])); \ + DEBUG_PRINT2 (" ever_matched=%d", \ + EVER_MATCHED_SOMETHING (reg_info[this_reg])); \ + DEBUG_PRINT1 ("\n"); \ + PUSH_FAILURE_ELT (reg_info[this_reg].word); \ + } \ + \ + DEBUG_PRINT2 (" Pushing low active reg: %ld\n", lowest_active_reg);\ + PUSH_FAILURE_INT (lowest_active_reg); \ + \ + DEBUG_PRINT2 (" Pushing high active reg: %ld\n", highest_active_reg);\ + PUSH_FAILURE_INT (highest_active_reg); \ + \ + DEBUG_PRINT2 (" Pushing pattern %p:\n", pattern_place); \ + DEBUG_PRINT_COMPILED_PATTERN (bufp, pattern_place, pend); \ + PUSH_FAILURE_POINTER (pattern_place); \ + \ + DEBUG_PRINT2 (" Pushing string %p: `", string_place); \ + DEBUG_PRINT_DOUBLE_STRING (string_place, string1, size1, string2, \ + size2); \ + DEBUG_PRINT1 ("'\n"); \ + PUSH_FAILURE_POINTER (string_place); \ + \ + DEBUG_PRINT2 (" Pushing failure id: %u\n", failure_id); \ + DEBUG_PUSH (failure_id); \ + } while (0) + +# ifndef DEFINED_ONCE +/* This is the number of items that are pushed and popped on the stack + for each register. */ +# define NUM_REG_ITEMS 3 + +/* Individual items aside from the registers. */ +# ifdef DEBUG +# define NUM_NONREG_ITEMS 5 /* Includes failure point id. */ +# else +# define NUM_NONREG_ITEMS 4 +# endif + +/* We push at most this many items on the stack. */ +/* We used to use (num_regs - 1), which is the number of registers + this regexp will save; but that was changed to 5 + to avoid stack overflow for a regexp with lots of parens. */ +# define MAX_FAILURE_ITEMS (5 * NUM_REG_ITEMS + NUM_NONREG_ITEMS) + +/* We actually push this many items. */ +# define NUM_FAILURE_ITEMS \ + (((0 \ + ? 0 : highest_active_reg - lowest_active_reg + 1) \ + * NUM_REG_ITEMS) \ + + NUM_NONREG_ITEMS) + +/* How many items can still be added to the stack without overflowing it. */ +# define REMAINING_AVAIL_SLOTS ((fail_stack).size - (fail_stack).avail) +# endif /* not DEFINED_ONCE */ + + +/* Pops what PUSH_FAIL_STACK pushes. + + We restore into the parameters, all of which should be lvalues: + STR -- the saved data position. + PAT -- the saved pattern position. + LOW_REG, HIGH_REG -- the highest and lowest active registers. + REGSTART, REGEND -- arrays of string positions. + REG_INFO -- array of information about each subexpression. + + Also assumes the variables `fail_stack' and (if debugging), `bufp', + `pend', `string1', `size1', `string2', and `size2'. */ +# define POP_FAILURE_POINT(str, pat, low_reg, high_reg, regstart, regend, reg_info)\ +{ \ + DEBUG_STATEMENT (unsigned failure_id;) \ + active_reg_t this_reg; \ + const UCHAR_T *string_temp; \ + \ + assert (!FAIL_STACK_EMPTY ()); \ + \ + /* Remove failure points and point to how many regs pushed. */ \ + DEBUG_PRINT1 ("POP_FAILURE_POINT:\n"); \ + DEBUG_PRINT2 (" Before pop, next avail: %d\n", fail_stack.avail); \ + DEBUG_PRINT2 (" size: %d\n", fail_stack.size); \ + \ + assert (fail_stack.avail >= NUM_NONREG_ITEMS); \ + \ + DEBUG_POP (&failure_id); \ + DEBUG_PRINT2 (" Popping failure id: %u\n", failure_id); \ + \ + /* If the saved string location is NULL, it came from an \ + on_failure_keep_string_jump opcode, and we want to throw away the \ + saved NULL, thus retaining our current position in the string. */ \ + string_temp = POP_FAILURE_POINTER (); \ + if (string_temp != NULL) \ + str = (const CHAR_T *) string_temp; \ + \ + DEBUG_PRINT2 (" Popping string %p: `", str); \ + DEBUG_PRINT_DOUBLE_STRING (str, string1, size1, string2, size2); \ + DEBUG_PRINT1 ("'\n"); \ + \ + pat = (UCHAR_T *) POP_FAILURE_POINTER (); \ + DEBUG_PRINT2 (" Popping pattern %p:\n", pat); \ + DEBUG_PRINT_COMPILED_PATTERN (bufp, pat, pend); \ + \ + /* Restore register info. */ \ + high_reg = (active_reg_t) POP_FAILURE_INT (); \ + DEBUG_PRINT2 (" Popping high active reg: %ld\n", high_reg); \ + \ + low_reg = (active_reg_t) POP_FAILURE_INT (); \ + DEBUG_PRINT2 (" Popping low active reg: %ld\n", low_reg); \ + \ + if (1) \ + for (this_reg = high_reg; this_reg >= low_reg; this_reg--) \ + { \ + DEBUG_PRINT2 (" Popping reg: %ld\n", this_reg); \ + \ + reg_info[this_reg].word = POP_FAILURE_ELT (); \ + DEBUG_PRINT2 (" info: %p\n", \ + reg_info[this_reg].word.pointer); \ + \ + regend[this_reg] = (const CHAR_T *) POP_FAILURE_POINTER (); \ + DEBUG_PRINT2 (" end: %p\n", regend[this_reg]); \ + \ + regstart[this_reg] = (const CHAR_T *) POP_FAILURE_POINTER (); \ + DEBUG_PRINT2 (" start: %p\n", regstart[this_reg]); \ + } \ + else \ + { \ + for (this_reg = highest_active_reg; this_reg > high_reg; this_reg--) \ + { \ + reg_info[this_reg].word.integer = 0; \ + regend[this_reg] = 0; \ + regstart[this_reg] = 0; \ + } \ + highest_active_reg = high_reg; \ + } \ + \ + set_regs_matched_done = 0; \ + DEBUG_STATEMENT (nfailure_points_popped++); \ +} /* POP_FAILURE_POINT */ + +/* Structure for per-register (a.k.a. per-group) information. + Other register information, such as the + starting and ending positions (which are addresses), and the list of + inner groups (which is a bits list) are maintained in separate + variables. + + We are making a (strictly speaking) nonportable assumption here: that + the compiler will pack our bit fields into something that fits into + the type of `word', i.e., is something that fits into one item on the + failure stack. */ + + +/* Declarations and macros for re_match_2. */ + +typedef union +{ + PREFIX(fail_stack_elt_t) word; + struct + { + /* This field is one if this group can match the empty string, + zero if not. If not yet determined, `MATCH_NULL_UNSET_VALUE'. */ +# define MATCH_NULL_UNSET_VALUE 3 + unsigned match_null_string_p : 2; + unsigned is_active : 1; + unsigned matched_something : 1; + unsigned ever_matched_something : 1; + } bits; +} PREFIX(register_info_type); + +# ifndef DEFINED_ONCE +# define REG_MATCH_NULL_STRING_P(R) ((R).bits.match_null_string_p) +# define IS_ACTIVE(R) ((R).bits.is_active) +# define MATCHED_SOMETHING(R) ((R).bits.matched_something) +# define EVER_MATCHED_SOMETHING(R) ((R).bits.ever_matched_something) + + +/* Call this when have matched a real character; it sets `matched' flags + for the subexpressions which we are currently inside. Also records + that those subexprs have matched. */ +# define SET_REGS_MATCHED() \ + do \ + { \ + if (!set_regs_matched_done) \ + { \ + active_reg_t r; \ + set_regs_matched_done = 1; \ + for (r = lowest_active_reg; r <= highest_active_reg; r++) \ + { \ + MATCHED_SOMETHING (reg_info[r]) \ + = EVER_MATCHED_SOMETHING (reg_info[r]) \ + = 1; \ + } \ + } \ + } \ + while (0) +# endif /* not DEFINED_ONCE */ + +/* Registers are set to a sentinel when they haven't yet matched. */ +static CHAR_T PREFIX(reg_unset_dummy); +# define REG_UNSET_VALUE (&PREFIX(reg_unset_dummy)) +# define REG_UNSET(e) ((e) == REG_UNSET_VALUE) + +/* Subroutine declarations and macros for regex_compile. */ +static void PREFIX(store_op1) _RE_ARGS ((re_opcode_t op, UCHAR_T *loc, int arg)); +static void PREFIX(store_op2) _RE_ARGS ((re_opcode_t op, UCHAR_T *loc, + int arg1, int arg2)); +static void PREFIX(insert_op1) _RE_ARGS ((re_opcode_t op, UCHAR_T *loc, + int arg, UCHAR_T *end)); +static void PREFIX(insert_op2) _RE_ARGS ((re_opcode_t op, UCHAR_T *loc, + int arg1, int arg2, UCHAR_T *end)); +static boolean PREFIX(at_begline_loc_p) _RE_ARGS ((const CHAR_T *pattern, + const CHAR_T *p, + reg_syntax_t syntax)); +static boolean PREFIX(at_endline_loc_p) _RE_ARGS ((const CHAR_T *p, + const CHAR_T *pend, + reg_syntax_t syntax)); +# ifdef WCHAR +static reg_errcode_t wcs_compile_range _RE_ARGS ((CHAR_T range_start, + const CHAR_T **p_ptr, + const CHAR_T *pend, + char *translate, + reg_syntax_t syntax, + UCHAR_T *b, + CHAR_T *char_set)); +static void insert_space _RE_ARGS ((int num, CHAR_T *loc, CHAR_T *end)); +# else /* BYTE */ +static reg_errcode_t byte_compile_range _RE_ARGS ((unsigned int range_start, + const char **p_ptr, + const char *pend, + char *translate, + reg_syntax_t syntax, + unsigned char *b)); +# endif /* WCHAR */ + +/* Fetch the next character in the uncompiled pattern---translating it + if necessary. Also cast from a signed character in the constant + string passed to us by the user to an unsigned char that we can use + as an array index (in, e.g., `translate'). */ +/* ifdef MBS_SUPPORT, we translate only if character <= 0xff, + because it is impossible to allocate 4GB array for some encodings + which have 4 byte character_set like UCS4. */ +# ifndef PATFETCH +# ifdef WCHAR +# define PATFETCH(c) \ + do {if (p == pend) return REG_EEND; \ + c = (UCHAR_T) *p++; \ + if (translate && (c <= 0xff)) c = (UCHAR_T) translate[c]; \ + } while (0) +# else /* BYTE */ +# define PATFETCH(c) \ + do {if (p == pend) return REG_EEND; \ + c = (unsigned char) *p++; \ + if (translate) c = (unsigned char) translate[c]; \ + } while (0) +# endif /* WCHAR */ +# endif + +/* Fetch the next character in the uncompiled pattern, with no + translation. */ +# define PATFETCH_RAW(c) \ + do {if (p == pend) return REG_EEND; \ + c = (UCHAR_T) *p++; \ + } while (0) + +/* Go backwards one character in the pattern. */ +# define PATUNFETCH p-- + + +/* If `translate' is non-null, return translate[D], else just D. We + cast the subscript to translate because some data is declared as + `char *', to avoid warnings when a string constant is passed. But + when we use a character as a subscript we must make it unsigned. */ +/* ifdef MBS_SUPPORT, we translate only if character <= 0xff, + because it is impossible to allocate 4GB array for some encodings + which have 4 byte character_set like UCS4. */ + +# ifndef TRANSLATE +# ifdef WCHAR +# define TRANSLATE(d) \ + ((translate && ((UCHAR_T) (d)) <= 0xff) \ + ? (char) translate[(unsigned char) (d)] : (d)) +# else /* BYTE */ +# define TRANSLATE(d) \ + (translate ? (char) translate[(unsigned char) (d)] : (d)) +# endif /* WCHAR */ +# endif + + +/* Macros for outputting the compiled pattern into `buffer'. */ + +/* If the buffer isn't allocated when it comes in, use this. */ +# define INIT_BUF_SIZE (32 * sizeof(UCHAR_T)) + +/* Make sure we have at least N more bytes of space in buffer. */ +# ifdef WCHAR +# define GET_BUFFER_SPACE(n) \ + while (((unsigned long)b - (unsigned long)COMPILED_BUFFER_VAR \ + + (n)*sizeof(CHAR_T)) > bufp->allocated) \ + EXTEND_BUFFER () +# else /* BYTE */ +# define GET_BUFFER_SPACE(n) \ + while ((unsigned long) (b - bufp->buffer + (n)) > bufp->allocated) \ + EXTEND_BUFFER () +# endif /* WCHAR */ + +/* Make sure we have one more byte of buffer space and then add C to it. */ +# define BUF_PUSH(c) \ + do { \ + GET_BUFFER_SPACE (1); \ + *b++ = (UCHAR_T) (c); \ + } while (0) + + +/* Ensure we have two more bytes of buffer space and then append C1 and C2. */ +# define BUF_PUSH_2(c1, c2) \ + do { \ + GET_BUFFER_SPACE (2); \ + *b++ = (UCHAR_T) (c1); \ + *b++ = (UCHAR_T) (c2); \ + } while (0) + + +/* As with BUF_PUSH_2, except for three bytes. */ +# define BUF_PUSH_3(c1, c2, c3) \ + do { \ + GET_BUFFER_SPACE (3); \ + *b++ = (UCHAR_T) (c1); \ + *b++ = (UCHAR_T) (c2); \ + *b++ = (UCHAR_T) (c3); \ + } while (0) + +/* Store a jump with opcode OP at LOC to location TO. We store a + relative address offset by the three bytes the jump itself occupies. */ +# define STORE_JUMP(op, loc, to) \ + PREFIX(store_op1) (op, loc, (int) ((to) - (loc) - (1 + OFFSET_ADDRESS_SIZE))) + +/* Likewise, for a two-argument jump. */ +# define STORE_JUMP2(op, loc, to, arg) \ + PREFIX(store_op2) (op, loc, (int) ((to) - (loc) - (1 + OFFSET_ADDRESS_SIZE)), arg) + +/* Like `STORE_JUMP', but for inserting. Assume `b' is the buffer end. */ +# define INSERT_JUMP(op, loc, to) \ + PREFIX(insert_op1) (op, loc, (int) ((to) - (loc) - (1 + OFFSET_ADDRESS_SIZE)), b) + +/* Like `STORE_JUMP2', but for inserting. Assume `b' is the buffer end. */ +# define INSERT_JUMP2(op, loc, to, arg) \ + PREFIX(insert_op2) (op, loc, (int) ((to) - (loc) - (1 + OFFSET_ADDRESS_SIZE)),\ + arg, b) + +/* This is not an arbitrary limit: the arguments which represent offsets + into the pattern are two bytes long. So if 2^16 bytes turns out to + be too small, many things would have to change. */ +/* Any other compiler which, like MSC, has allocation limit below 2^16 + bytes will have to use approach similar to what was done below for + MSC and drop MAX_BUF_SIZE a bit. Otherwise you may end up + reallocating to 0 bytes. Such thing is not going to work too well. + You have been warned!! */ +# ifndef DEFINED_ONCE +# if defined _MSC_VER && !defined WIN32 +/* Microsoft C 16-bit versions limit malloc to approx 65512 bytes. + The REALLOC define eliminates a flurry of conversion warnings, + but is not required. */ +# define MAX_BUF_SIZE 65500L +# define REALLOC(p,s) realloc ((p), (size_t) (s)) +# else +# define MAX_BUF_SIZE (1L << 16) +# define REALLOC(p,s) realloc ((p), (s)) +# endif + +/* Extend the buffer by twice its current size via realloc and + reset the pointers that pointed into the old block to point to the + correct places in the new one. If extending the buffer results in it + being larger than MAX_BUF_SIZE, then flag memory exhausted. */ +# if __BOUNDED_POINTERS__ +# define SET_HIGH_BOUND(P) (__ptrhigh (P) = __ptrlow (P) + bufp->allocated) +# define MOVE_BUFFER_POINTER(P) \ + (__ptrlow (P) += incr, SET_HIGH_BOUND (P), __ptrvalue (P) += incr) +# define ELSE_EXTEND_BUFFER_HIGH_BOUND \ + else \ + { \ + SET_HIGH_BOUND (b); \ + SET_HIGH_BOUND (begalt); \ + if (fixup_alt_jump) \ + SET_HIGH_BOUND (fixup_alt_jump); \ + if (laststart) \ + SET_HIGH_BOUND (laststart); \ + if (pending_exact) \ + SET_HIGH_BOUND (pending_exact); \ + } +# else +# define MOVE_BUFFER_POINTER(P) (P) += incr +# define ELSE_EXTEND_BUFFER_HIGH_BOUND +# endif +# endif /* not DEFINED_ONCE */ + +# ifdef WCHAR +# define EXTEND_BUFFER() \ + do { \ + UCHAR_T *old_buffer = COMPILED_BUFFER_VAR; \ + int wchar_count; \ + if (bufp->allocated + sizeof(UCHAR_T) > MAX_BUF_SIZE) \ + return REG_ESIZE; \ + bufp->allocated <<= 1; \ + if (bufp->allocated > MAX_BUF_SIZE) \ + bufp->allocated = MAX_BUF_SIZE; \ + /* How many characters the new buffer can have? */ \ + wchar_count = bufp->allocated / sizeof(UCHAR_T); \ + if (wchar_count == 0) wchar_count = 1; \ + /* Truncate the buffer to CHAR_T align. */ \ + bufp->allocated = wchar_count * sizeof(UCHAR_T); \ + RETALLOC (COMPILED_BUFFER_VAR, wchar_count, UCHAR_T); \ + bufp->buffer = (char*)COMPILED_BUFFER_VAR; \ + if (COMPILED_BUFFER_VAR == NULL) \ + return REG_ESPACE; \ + /* If the buffer moved, move all the pointers into it. */ \ + if (old_buffer != COMPILED_BUFFER_VAR) \ + { \ + int incr = COMPILED_BUFFER_VAR - old_buffer; \ + MOVE_BUFFER_POINTER (b); \ + MOVE_BUFFER_POINTER (begalt); \ + if (fixup_alt_jump) \ + MOVE_BUFFER_POINTER (fixup_alt_jump); \ + if (laststart) \ + MOVE_BUFFER_POINTER (laststart); \ + if (pending_exact) \ + MOVE_BUFFER_POINTER (pending_exact); \ + } \ + ELSE_EXTEND_BUFFER_HIGH_BOUND \ + } while (0) +# else /* BYTE */ +# define EXTEND_BUFFER() \ + do { \ + UCHAR_T *old_buffer = COMPILED_BUFFER_VAR; \ + if (bufp->allocated == MAX_BUF_SIZE) \ + return REG_ESIZE; \ + bufp->allocated <<= 1; \ + if (bufp->allocated > MAX_BUF_SIZE) \ + bufp->allocated = MAX_BUF_SIZE; \ + bufp->buffer = (UCHAR_T *) REALLOC (COMPILED_BUFFER_VAR, \ + bufp->allocated); \ + if (COMPILED_BUFFER_VAR == NULL) \ + return REG_ESPACE; \ + /* If the buffer moved, move all the pointers into it. */ \ + if (old_buffer != COMPILED_BUFFER_VAR) \ + { \ + int incr = COMPILED_BUFFER_VAR - old_buffer; \ + MOVE_BUFFER_POINTER (b); \ + MOVE_BUFFER_POINTER (begalt); \ + if (fixup_alt_jump) \ + MOVE_BUFFER_POINTER (fixup_alt_jump); \ + if (laststart) \ + MOVE_BUFFER_POINTER (laststart); \ + if (pending_exact) \ + MOVE_BUFFER_POINTER (pending_exact); \ + } \ + ELSE_EXTEND_BUFFER_HIGH_BOUND \ + } while (0) +# endif /* WCHAR */ + +# ifndef DEFINED_ONCE +/* Since we have one byte reserved for the register number argument to + {start,stop}_memory, the maximum number of groups we can report + things about is what fits in that byte. */ +# define MAX_REGNUM 255 + +/* But patterns can have more than `MAX_REGNUM' registers. We just + ignore the excess. */ +typedef unsigned regnum_t; + + +/* Macros for the compile stack. */ + +/* Since offsets can go either forwards or backwards, this type needs to + be able to hold values from -(MAX_BUF_SIZE - 1) to MAX_BUF_SIZE - 1. */ +/* int may be not enough when sizeof(int) == 2. */ +typedef long pattern_offset_t; + +typedef struct +{ + pattern_offset_t begalt_offset; + pattern_offset_t fixup_alt_jump; + pattern_offset_t inner_group_offset; + pattern_offset_t laststart_offset; + regnum_t regnum; +} compile_stack_elt_t; + + +typedef struct +{ + compile_stack_elt_t *stack; + unsigned size; + unsigned avail; /* Offset of next open position. */ +} compile_stack_type; + + +# define INIT_COMPILE_STACK_SIZE 32 + +# define COMPILE_STACK_EMPTY (compile_stack.avail == 0) +# define COMPILE_STACK_FULL (compile_stack.avail == compile_stack.size) + +/* The next available element. */ +# define COMPILE_STACK_TOP (compile_stack.stack[compile_stack.avail]) + +# endif /* not DEFINED_ONCE */ + +/* Set the bit for character C in a list. */ +# ifndef DEFINED_ONCE +# define SET_LIST_BIT(c) \ + (b[((unsigned char) (c)) / BYTEWIDTH] \ + |= 1 << (((unsigned char) c) % BYTEWIDTH)) +# endif /* DEFINED_ONCE */ + +/* Get the next unsigned number in the uncompiled pattern. */ +# define GET_UNSIGNED_NUMBER(num) \ + { \ + while (p != pend) \ + { \ + PATFETCH (c); \ + if (c < '0' || c > '9') \ + break; \ + if (num <= RE_DUP_MAX) \ + { \ + if (num < 0) \ + num = 0; \ + num = num * 10 + c - '0'; \ + } \ + } \ + } + +# ifndef DEFINED_ONCE +# if defined _LIBC || WIDE_CHAR_SUPPORT +/* The GNU C library provides support for user-defined character classes + and the functions from ISO C amendement 1. */ +# ifdef CHARCLASS_NAME_MAX +# define CHAR_CLASS_MAX_LENGTH CHARCLASS_NAME_MAX +# else +/* This shouldn't happen but some implementation might still have this + problem. Use a reasonable default value. */ +# define CHAR_CLASS_MAX_LENGTH 256 +# endif + +# ifdef _LIBC +# define IS_CHAR_CLASS(string) __wctype (string) +# else +# define IS_CHAR_CLASS(string) wctype (string) +# endif +# else +# define CHAR_CLASS_MAX_LENGTH 6 /* Namely, `xdigit'. */ + +# define IS_CHAR_CLASS(string) \ + (STREQ (string, "alpha") || STREQ (string, "upper") \ + || STREQ (string, "lower") || STREQ (string, "digit") \ + || STREQ (string, "alnum") || STREQ (string, "xdigit") \ + || STREQ (string, "space") || STREQ (string, "print") \ + || STREQ (string, "punct") || STREQ (string, "graph") \ + || STREQ (string, "cntrl") || STREQ (string, "blank")) +# endif +# endif /* DEFINED_ONCE */ + +# ifndef MATCH_MAY_ALLOCATE + +/* If we cannot allocate large objects within re_match_2_internal, + we make the fail stack and register vectors global. + The fail stack, we grow to the maximum size when a regexp + is compiled. + The register vectors, we adjust in size each time we + compile a regexp, according to the number of registers it needs. */ + +static PREFIX(fail_stack_type) fail_stack; + +/* Size with which the following vectors are currently allocated. + That is so we can make them bigger as needed, + but never make them smaller. */ +# ifdef DEFINED_ONCE +static int regs_allocated_size; + +static const char ** regstart, ** regend; +static const char ** old_regstart, ** old_regend; +static const char **best_regstart, **best_regend; +static const char **reg_dummy; +# endif /* DEFINED_ONCE */ + +static PREFIX(register_info_type) *PREFIX(reg_info); +static PREFIX(register_info_type) *PREFIX(reg_info_dummy); + +/* Make the register vectors big enough for NUM_REGS registers, + but don't make them smaller. */ + +static void +PREFIX(regex_grow_registers) (num_regs) + int num_regs; +{ + if (num_regs > regs_allocated_size) + { + RETALLOC_IF (regstart, num_regs, const char *); + RETALLOC_IF (regend, num_regs, const char *); + RETALLOC_IF (old_regstart, num_regs, const char *); + RETALLOC_IF (old_regend, num_regs, const char *); + RETALLOC_IF (best_regstart, num_regs, const char *); + RETALLOC_IF (best_regend, num_regs, const char *); + RETALLOC_IF (PREFIX(reg_info), num_regs, PREFIX(register_info_type)); + RETALLOC_IF (reg_dummy, num_regs, const char *); + RETALLOC_IF (PREFIX(reg_info_dummy), num_regs, PREFIX(register_info_type)); + + regs_allocated_size = num_regs; + } +} + +# endif /* not MATCH_MAY_ALLOCATE */ + +# ifndef DEFINED_ONCE +static boolean group_in_compile_stack _RE_ARGS ((compile_stack_type + compile_stack, + regnum_t regnum)); +# endif /* not DEFINED_ONCE */ + +/* `regex_compile' compiles PATTERN (of length SIZE) according to SYNTAX. + Returns one of error codes defined in `regex.h', or zero for success. + + Assumes the `allocated' (and perhaps `buffer') and `translate' + fields are set in BUFP on entry. + + If it succeeds, results are put in BUFP (if it returns an error, the + contents of BUFP are undefined): + `buffer' is the compiled pattern; + `syntax' is set to SYNTAX; + `used' is set to the length of the compiled pattern; + `fastmap_accurate' is zero; + `re_nsub' is the number of subexpressions in PATTERN; + `not_bol' and `not_eol' are zero; + + The `fastmap' and `newline_anchor' fields are neither + examined nor set. */ + +/* Return, freeing storage we allocated. */ +# ifdef WCHAR +# define FREE_STACK_RETURN(value) \ + return (free(pattern), free(mbs_offset), free(is_binary), free (compile_stack.stack), value) +# else +# define FREE_STACK_RETURN(value) \ + return (free (compile_stack.stack), value) +# endif /* WCHAR */ + +static reg_errcode_t +PREFIX(regex_compile) (ARG_PREFIX(pattern), ARG_PREFIX(size), syntax, bufp) + const char *ARG_PREFIX(pattern); + size_t ARG_PREFIX(size); + reg_syntax_t syntax; + struct re_pattern_buffer *bufp; +{ + /* We fetch characters from PATTERN here. Even though PATTERN is + `char *' (i.e., signed), we declare these variables as unsigned, so + they can be reliably used as array indices. */ + register UCHAR_T c, c1; + +#ifdef WCHAR + /* A temporary space to keep wchar_t pattern and compiled pattern. */ + CHAR_T *pattern, *COMPILED_BUFFER_VAR; + size_t size; + /* offset buffer for optimization. See convert_mbs_to_wc. */ + int *mbs_offset = NULL; + /* It hold whether each wchar_t is binary data or not. */ + char *is_binary = NULL; + /* A flag whether exactn is handling binary data or not. */ + char is_exactn_bin = FALSE; +#endif /* WCHAR */ + + /* A random temporary spot in PATTERN. */ + const CHAR_T *p1; + + /* Points to the end of the buffer, where we should append. */ + register UCHAR_T *b; + + /* Keeps track of unclosed groups. */ + compile_stack_type compile_stack; + + /* Points to the current (ending) position in the pattern. */ +#ifdef WCHAR + const CHAR_T *p; + const CHAR_T *pend; +#else /* BYTE */ + const CHAR_T *p = pattern; + const CHAR_T *pend = pattern + size; +#endif /* WCHAR */ + + /* How to translate the characters in the pattern. */ + RE_TRANSLATE_TYPE translate = bufp->translate; + + /* Address of the count-byte of the most recently inserted `exactn' + command. This makes it possible to tell if a new exact-match + character can be added to that command or if the character requires + a new `exactn' command. */ + UCHAR_T *pending_exact = 0; + + /* Address of start of the most recently finished expression. + This tells, e.g., postfix * where to find the start of its + operand. Reset at the beginning of groups and alternatives. */ + UCHAR_T *laststart = 0; + + /* Address of beginning of regexp, or inside of last group. */ + UCHAR_T *begalt; + + /* Address of the place where a forward jump should go to the end of + the containing expression. Each alternative of an `or' -- except the + last -- ends with a forward jump of this sort. */ + UCHAR_T *fixup_alt_jump = 0; + + /* Counts open-groups as they are encountered. Remembered for the + matching close-group on the compile stack, so the same register + number is put in the stop_memory as the start_memory. */ + regnum_t regnum = 0; + +#ifdef WCHAR + /* Initialize the wchar_t PATTERN and offset_buffer. */ + p = pend = pattern = TALLOC(csize + 1, CHAR_T); + mbs_offset = TALLOC(csize + 1, int); + is_binary = TALLOC(csize + 1, char); + if (pattern == NULL || mbs_offset == NULL || is_binary == NULL) + { + free(pattern); + free(mbs_offset); + free(is_binary); + return REG_ESPACE; + } + pattern[csize] = L'\0'; /* sentinel */ + size = convert_mbs_to_wcs(pattern, cpattern, csize, mbs_offset, is_binary); + pend = p + size; + if (size < 0) + { + free(pattern); + free(mbs_offset); + free(is_binary); + return REG_BADPAT; + } +#endif + +#ifdef DEBUG + DEBUG_PRINT1 ("\nCompiling pattern: "); + if (debug) + { + unsigned debug_count; + + for (debug_count = 0; debug_count < size; debug_count++) + PUT_CHAR (pattern[debug_count]); + putchar ('\n'); + } +#endif /* DEBUG */ + + /* Initialize the compile stack. */ + compile_stack.stack = TALLOC (INIT_COMPILE_STACK_SIZE, compile_stack_elt_t); + if (compile_stack.stack == NULL) + { +#ifdef WCHAR + free(pattern); + free(mbs_offset); + free(is_binary); +#endif + return REG_ESPACE; + } + + compile_stack.size = INIT_COMPILE_STACK_SIZE; + compile_stack.avail = 0; + + /* Initialize the pattern buffer. */ + bufp->syntax = syntax; + bufp->fastmap_accurate = 0; + bufp->not_bol = bufp->not_eol = 0; + + /* Set `used' to zero, so that if we return an error, the pattern + printer (for debugging) will think there's no pattern. We reset it + at the end. */ + bufp->used = 0; + + /* Always count groups, whether or not bufp->no_sub is set. */ + bufp->re_nsub = 0; + +#if !defined emacs && !defined SYNTAX_TABLE + /* Initialize the syntax table. */ + init_syntax_once (); +#endif + + if (bufp->allocated == 0) + { + if (bufp->buffer) + { /* If zero allocated, but buffer is non-null, try to realloc + enough space. This loses if buffer's address is bogus, but + that is the user's responsibility. */ +#ifdef WCHAR + /* Free bufp->buffer and allocate an array for wchar_t pattern + buffer. */ + free(bufp->buffer); + COMPILED_BUFFER_VAR = TALLOC (INIT_BUF_SIZE/sizeof(UCHAR_T), + UCHAR_T); +#else + RETALLOC (COMPILED_BUFFER_VAR, INIT_BUF_SIZE, UCHAR_T); +#endif /* WCHAR */ + } + else + { /* Caller did not allocate a buffer. Do it for them. */ + COMPILED_BUFFER_VAR = TALLOC (INIT_BUF_SIZE / sizeof(UCHAR_T), + UCHAR_T); + } + + if (!COMPILED_BUFFER_VAR) FREE_STACK_RETURN (REG_ESPACE); +#ifdef WCHAR + bufp->buffer = (char*)COMPILED_BUFFER_VAR; +#endif /* WCHAR */ + bufp->allocated = INIT_BUF_SIZE; + } +#ifdef WCHAR + else + COMPILED_BUFFER_VAR = (UCHAR_T*) bufp->buffer; +#endif + + begalt = b = COMPILED_BUFFER_VAR; + + /* Loop through the uncompiled pattern until we're at the end. */ + while (p != pend) + { + PATFETCH (c); + + switch (c) + { + case '^': + { + if ( /* If at start of pattern, it's an operator. */ + p == pattern + 1 + /* If context independent, it's an operator. */ + || syntax & RE_CONTEXT_INDEP_ANCHORS + /* Otherwise, depends on what's come before. */ + || PREFIX(at_begline_loc_p) (pattern, p, syntax)) + BUF_PUSH (begline); + else + goto normal_char; + } + break; + + + case '$': + { + if ( /* If at end of pattern, it's an operator. */ + p == pend + /* If context independent, it's an operator. */ + || syntax & RE_CONTEXT_INDEP_ANCHORS + /* Otherwise, depends on what's next. */ + || PREFIX(at_endline_loc_p) (p, pend, syntax)) + BUF_PUSH (endline); + else + goto normal_char; + } + break; + + + case '+': + case '?': + if ((syntax & RE_BK_PLUS_QM) + || (syntax & RE_LIMITED_OPS)) + goto normal_char; + handle_plus: + case '*': + /* If there is no previous pattern... */ + if (!laststart) + { + if (syntax & RE_CONTEXT_INVALID_OPS) + FREE_STACK_RETURN (REG_BADRPT); + else if (!(syntax & RE_CONTEXT_INDEP_OPS)) + goto normal_char; + } + + { + /* Are we optimizing this jump? */ + boolean keep_string_p = false; + + /* 1 means zero (many) matches is allowed. */ + char zero_times_ok = 0, many_times_ok = 0; + + /* If there is a sequence of repetition chars, collapse it + down to just one (the right one). We can't combine + interval operators with these because of, e.g., `a{2}*', + which should only match an even number of `a's. */ + + for (;;) + { + zero_times_ok |= c != '+'; + many_times_ok |= c != '?'; + + if (p == pend) + break; + + PATFETCH (c); + + if (c == '*' + || (!(syntax & RE_BK_PLUS_QM) && (c == '+' || c == '?'))) + ; + + else if (syntax & RE_BK_PLUS_QM && c == '\\') + { + if (p == pend) FREE_STACK_RETURN (REG_EESCAPE); + + PATFETCH (c1); + if (!(c1 == '+' || c1 == '?')) + { + PATUNFETCH; + PATUNFETCH; + break; + } + + c = c1; + } + else + { + PATUNFETCH; + break; + } + + /* If we get here, we found another repeat character. */ + } + + /* Star, etc. applied to an empty pattern is equivalent + to an empty pattern. */ + if (!laststart) + break; + + /* Now we know whether or not zero matches is allowed + and also whether or not two or more matches is allowed. */ + if (many_times_ok) + { /* More than one repetition is allowed, so put in at the + end a backward relative jump from `b' to before the next + jump we're going to put in below (which jumps from + laststart to after this jump). + + But if we are at the `*' in the exact sequence `.*\n', + insert an unconditional jump backwards to the ., + instead of the beginning of the loop. This way we only + push a failure point once, instead of every time + through the loop. */ + assert (p - 1 > pattern); + + /* Allocate the space for the jump. */ + GET_BUFFER_SPACE (1 + OFFSET_ADDRESS_SIZE); + + /* We know we are not at the first character of the pattern, + because laststart was nonzero. And we've already + incremented `p', by the way, to be the character after + the `*'. Do we have to do something analogous here + for null bytes, because of RE_DOT_NOT_NULL? */ + if (TRANSLATE (*(p - 2)) == TRANSLATE ('.') + && zero_times_ok + && p < pend && TRANSLATE (*p) == TRANSLATE ('\n') + && !(syntax & RE_DOT_NEWLINE)) + { /* We have .*\n. */ + STORE_JUMP (jump, b, laststart); + keep_string_p = true; + } + else + /* Anything else. */ + STORE_JUMP (maybe_pop_jump, b, laststart - + (1 + OFFSET_ADDRESS_SIZE)); + + /* We've added more stuff to the buffer. */ + b += 1 + OFFSET_ADDRESS_SIZE; + } + + /* On failure, jump from laststart to b + 3, which will be the + end of the buffer after this jump is inserted. */ + /* ifdef WCHAR, 'b + 1 + OFFSET_ADDRESS_SIZE' instead of + 'b + 3'. */ + GET_BUFFER_SPACE (1 + OFFSET_ADDRESS_SIZE); + INSERT_JUMP (keep_string_p ? on_failure_keep_string_jump + : on_failure_jump, + laststart, b + 1 + OFFSET_ADDRESS_SIZE); + pending_exact = 0; + b += 1 + OFFSET_ADDRESS_SIZE; + + if (!zero_times_ok) + { + /* At least one repetition is required, so insert a + `dummy_failure_jump' before the initial + `on_failure_jump' instruction of the loop. This + effects a skip over that instruction the first time + we hit that loop. */ + GET_BUFFER_SPACE (1 + OFFSET_ADDRESS_SIZE); + INSERT_JUMP (dummy_failure_jump, laststart, laststart + + 2 + 2 * OFFSET_ADDRESS_SIZE); + b += 1 + OFFSET_ADDRESS_SIZE; + } + } + break; + + + case '.': + laststart = b; + BUF_PUSH (anychar); + break; + + + case '[': + { + boolean had_char_class = false; +#ifdef WCHAR + CHAR_T range_start = 0xffffffff; +#else + unsigned int range_start = 0xffffffff; +#endif + if (p == pend) FREE_STACK_RETURN (REG_EBRACK); + +#ifdef WCHAR + /* We assume a charset(_not) structure as a wchar_t array. + charset[0] = (re_opcode_t) charset(_not) + charset[1] = l (= length of char_classes) + charset[2] = m (= length of collating_symbols) + charset[3] = n (= length of equivalence_classes) + charset[4] = o (= length of char_ranges) + charset[5] = p (= length of chars) + + charset[6] = char_class (wctype_t) + charset[6+CHAR_CLASS_SIZE] = char_class (wctype_t) + ... + charset[l+5] = char_class (wctype_t) + + charset[l+6] = collating_symbol (wchar_t) + ... + charset[l+m+5] = collating_symbol (wchar_t) + ifdef _LIBC we use the index if + _NL_COLLATE_SYMB_EXTRAMB instead of + wchar_t string. + + charset[l+m+6] = equivalence_classes (wchar_t) + ... + charset[l+m+n+5] = equivalence_classes (wchar_t) + ifdef _LIBC we use the index in + _NL_COLLATE_WEIGHT instead of + wchar_t string. + + charset[l+m+n+6] = range_start + charset[l+m+n+7] = range_end + ... + charset[l+m+n+2o+4] = range_start + charset[l+m+n+2o+5] = range_end + ifdef _LIBC we use the value looked up + in _NL_COLLATE_COLLSEQ instead of + wchar_t character. + + charset[l+m+n+2o+6] = char + ... + charset[l+m+n+2o+p+5] = char + + */ + + /* We need at least 6 spaces: the opcode, the length of + char_classes, the length of collating_symbols, the length of + equivalence_classes, the length of char_ranges, the length of + chars. */ + GET_BUFFER_SPACE (6); + + /* Save b as laststart. And We use laststart as the pointer + to the first element of the charset here. + In other words, laststart[i] indicates charset[i]. */ + laststart = b; + + /* We test `*p == '^' twice, instead of using an if + statement, so we only need one BUF_PUSH. */ + BUF_PUSH (*p == '^' ? charset_not : charset); + if (*p == '^') + p++; + + /* Push the length of char_classes, the length of + collating_symbols, the length of equivalence_classes, the + length of char_ranges and the length of chars. */ + BUF_PUSH_3 (0, 0, 0); + BUF_PUSH_2 (0, 0); + + /* Remember the first position in the bracket expression. */ + p1 = p; + + /* charset_not matches newline according to a syntax bit. */ + if ((re_opcode_t) b[-6] == charset_not + && (syntax & RE_HAT_LISTS_NOT_NEWLINE)) + { + BUF_PUSH('\n'); + laststart[5]++; /* Update the length of characters */ + } + + /* Read in characters and ranges, setting map bits. */ + for (;;) + { + if (p == pend) FREE_STACK_RETURN (REG_EBRACK); + + PATFETCH (c); + + /* \ might escape characters inside [...] and [^...]. */ + if ((syntax & RE_BACKSLASH_ESCAPE_IN_LISTS) && c == '\\') + { + if (p == pend) FREE_STACK_RETURN (REG_EESCAPE); + + PATFETCH (c1); + BUF_PUSH(c1); + laststart[5]++; /* Update the length of chars */ + range_start = c1; + continue; + } + + /* Could be the end of the bracket expression. If it's + not (i.e., when the bracket expression is `[]' so + far), the ']' character bit gets set way below. */ + if (c == ']' && p != p1 + 1) + break; + + /* Look ahead to see if it's a range when the last thing + was a character class. */ + if (had_char_class && c == '-' && *p != ']') + FREE_STACK_RETURN (REG_ERANGE); + + /* Look ahead to see if it's a range when the last thing + was a character: if this is a hyphen not at the + beginning or the end of a list, then it's the range + operator. */ + if (c == '-' + && !(p - 2 >= pattern && p[-2] == '[') + && !(p - 3 >= pattern && p[-3] == '[' && p[-2] == '^') + && *p != ']') + { + reg_errcode_t ret; + /* Allocate the space for range_start and range_end. */ + GET_BUFFER_SPACE (2); + /* Update the pointer to indicate end of buffer. */ + b += 2; + ret = wcs_compile_range (range_start, &p, pend, translate, + syntax, b, laststart); + if (ret != REG_NOERROR) FREE_STACK_RETURN (ret); + range_start = 0xffffffff; + } + else if (p[0] == '-' && p[1] != ']') + { /* This handles ranges made up of characters only. */ + reg_errcode_t ret; + + /* Move past the `-'. */ + PATFETCH (c1); + /* Allocate the space for range_start and range_end. */ + GET_BUFFER_SPACE (2); + /* Update the pointer to indicate end of buffer. */ + b += 2; + ret = wcs_compile_range (c, &p, pend, translate, syntax, b, + laststart); + if (ret != REG_NOERROR) FREE_STACK_RETURN (ret); + range_start = 0xffffffff; + } + + /* See if we're at the beginning of a possible character + class. */ + else if (syntax & RE_CHAR_CLASSES && c == '[' && *p == ':') + { /* Leave room for the null. */ + char str[CHAR_CLASS_MAX_LENGTH + 1]; + + PATFETCH (c); + c1 = 0; + + /* If pattern is `[[:'. */ + if (p == pend) FREE_STACK_RETURN (REG_EBRACK); + + for (;;) + { + PATFETCH (c); + if ((c == ':' && *p == ']') || p == pend) + break; + if (c1 < CHAR_CLASS_MAX_LENGTH) + str[c1++] = c; + else + /* This is in any case an invalid class name. */ + str[0] = '\0'; + } + str[c1] = '\0'; + + /* If isn't a word bracketed by `[:' and `:]': + undo the ending character, the letters, and leave + the leading `:' and `[' (but store them as character). */ + if (c == ':' && *p == ']') + { + wctype_t wt; + uintptr_t alignedp; + + /* Query the character class as wctype_t. */ + wt = IS_CHAR_CLASS (str); + if (wt == 0) + FREE_STACK_RETURN (REG_ECTYPE); + + /* Throw away the ] at the end of the character + class. */ + PATFETCH (c); + + if (p == pend) FREE_STACK_RETURN (REG_EBRACK); + + /* Allocate the space for character class. */ + GET_BUFFER_SPACE(CHAR_CLASS_SIZE); + /* Update the pointer to indicate end of buffer. */ + b += CHAR_CLASS_SIZE; + /* Move data which follow character classes + not to violate the data. */ + insert_space(CHAR_CLASS_SIZE, + laststart + 6 + laststart[1], + b - 1); + alignedp = ((uintptr_t)(laststart + 6 + laststart[1]) + + __alignof__(wctype_t) - 1) + & ~(uintptr_t)(__alignof__(wctype_t) - 1); + /* Store the character class. */ + *((wctype_t*)alignedp) = wt; + /* Update length of char_classes */ + laststart[1] += CHAR_CLASS_SIZE; + + had_char_class = true; + } + else + { + c1++; + while (c1--) + PATUNFETCH; + BUF_PUSH ('['); + BUF_PUSH (':'); + laststart[5] += 2; /* Update the length of characters */ + range_start = ':'; + had_char_class = false; + } + } + else if (syntax & RE_CHAR_CLASSES && c == '[' && (*p == '=' + || *p == '.')) + { + CHAR_T str[128]; /* Should be large enough. */ + CHAR_T delim = *p; /* '=' or '.' */ +# ifdef _LIBC + uint32_t nrules = + _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES); +# endif + PATFETCH (c); + c1 = 0; + + /* If pattern is `[[=' or '[[.'. */ + if (p == pend) FREE_STACK_RETURN (REG_EBRACK); + + for (;;) + { + PATFETCH (c); + if ((c == delim && *p == ']') || p == pend) + break; + if (c1 < sizeof (str) - 1) + str[c1++] = c; + else + /* This is in any case an invalid class name. */ + str[0] = '\0'; + } + str[c1] = '\0'; + + if (c == delim && *p == ']' && str[0] != '\0') + { + unsigned int i, offset; + /* If we have no collation data we use the default + collation in which each character is in a class + by itself. It also means that ASCII is the + character set and therefore we cannot have character + with more than one byte in the multibyte + representation. */ + + /* If not defined _LIBC, we push the name and + `\0' for the sake of matching performance. */ + int datasize = c1 + 1; + +# ifdef _LIBC + int32_t idx = 0; + if (nrules == 0) +# endif + { + if (c1 != 1) + FREE_STACK_RETURN (REG_ECOLLATE); + } +# ifdef _LIBC + else + { + const int32_t *table; + const int32_t *weights; + const int32_t *extra; + const int32_t *indirect; + wint_t *cp; + + /* This #include defines a local function! */ +# include + + if(delim == '=') + { + /* We push the index for equivalence class. */ + cp = (wint_t*)str; + + table = (const int32_t *) + _NL_CURRENT (LC_COLLATE, + _NL_COLLATE_TABLEWC); + weights = (const int32_t *) + _NL_CURRENT (LC_COLLATE, + _NL_COLLATE_WEIGHTWC); + extra = (const int32_t *) + _NL_CURRENT (LC_COLLATE, + _NL_COLLATE_EXTRAWC); + indirect = (const int32_t *) + _NL_CURRENT (LC_COLLATE, + _NL_COLLATE_INDIRECTWC); + + idx = findidx ((const wint_t**)&cp); + if (idx == 0 || cp < (wint_t*) str + c1) + /* This is no valid character. */ + FREE_STACK_RETURN (REG_ECOLLATE); + + str[0] = (wchar_t)idx; + } + else /* delim == '.' */ + { + /* We push collation sequence value + for collating symbol. */ + int32_t table_size; + const int32_t *symb_table; + const unsigned char *extra; + int32_t idx; + int32_t elem; + int32_t second; + int32_t hash; + char char_str[c1]; + + /* We have to convert the name to a single-byte + string. This is possible since the names + consist of ASCII characters and the internal + representation is UCS4. */ + for (i = 0; i < c1; ++i) + char_str[i] = str[i]; + + table_size = + _NL_CURRENT_WORD (LC_COLLATE, + _NL_COLLATE_SYMB_HASH_SIZEMB); + symb_table = (const int32_t *) + _NL_CURRENT (LC_COLLATE, + _NL_COLLATE_SYMB_TABLEMB); + extra = (const unsigned char *) + _NL_CURRENT (LC_COLLATE, + _NL_COLLATE_SYMB_EXTRAMB); + + /* Locate the character in the hashing table. */ + hash = elem_hash (char_str, c1); + + idx = 0; + elem = hash % table_size; + second = hash % (table_size - 2); + while (symb_table[2 * elem] != 0) + { + /* First compare the hashing value. */ + if (symb_table[2 * elem] == hash + && c1 == extra[symb_table[2 * elem + 1]] + && memcmp (char_str, + &extra[symb_table[2 * elem + 1] + + 1], c1) == 0) + { + /* Yep, this is the entry. */ + idx = symb_table[2 * elem + 1]; + idx += 1 + extra[idx]; + break; + } + + /* Next entry. */ + elem += second; + } + + if (symb_table[2 * elem] != 0) + { + /* Compute the index of the byte sequence + in the table. */ + idx += 1 + extra[idx]; + /* Adjust for the alignment. */ + idx = (idx + 3) & ~3; + + str[0] = (wchar_t) idx + 4; + } + else if (symb_table[2 * elem] == 0 && c1 == 1) + { + /* No valid character. Match it as a + single byte character. */ + had_char_class = false; + BUF_PUSH(str[0]); + /* Update the length of characters */ + laststart[5]++; + range_start = str[0]; + + /* Throw away the ] at the end of the + collating symbol. */ + PATFETCH (c); + /* exit from the switch block. */ + continue; + } + else + FREE_STACK_RETURN (REG_ECOLLATE); + } + datasize = 1; + } +# endif + /* Throw away the ] at the end of the equivalence + class (or collating symbol). */ + PATFETCH (c); + + /* Allocate the space for the equivalence class + (or collating symbol) (and '\0' if needed). */ + GET_BUFFER_SPACE(datasize); + /* Update the pointer to indicate end of buffer. */ + b += datasize; + + if (delim == '=') + { /* equivalence class */ + /* Calculate the offset of char_ranges, + which is next to equivalence_classes. */ + offset = laststart[1] + laststart[2] + + laststart[3] +6; + /* Insert space. */ + insert_space(datasize, laststart + offset, b - 1); + + /* Write the equivalence_class and \0. */ + for (i = 0 ; i < datasize ; i++) + laststart[offset + i] = str[i]; + + /* Update the length of equivalence_classes. */ + laststart[3] += datasize; + had_char_class = true; + } + else /* delim == '.' */ + { /* collating symbol */ + /* Calculate the offset of the equivalence_classes, + which is next to collating_symbols. */ + offset = laststart[1] + laststart[2] + 6; + /* Insert space and write the collationg_symbol + and \0. */ + insert_space(datasize, laststart + offset, b-1); + for (i = 0 ; i < datasize ; i++) + laststart[offset + i] = str[i]; + + /* In re_match_2_internal if range_start < -1, we + assume -range_start is the offset of the + collating symbol which is specified as + the character of the range start. So we assign + -(laststart[1] + laststart[2] + 6) to + range_start. */ + range_start = -(laststart[1] + laststart[2] + 6); + /* Update the length of collating_symbol. */ + laststart[2] += datasize; + had_char_class = false; + } + } + else + { + c1++; + while (c1--) + PATUNFETCH; + BUF_PUSH ('['); + BUF_PUSH (delim); + laststart[5] += 2; /* Update the length of characters */ + range_start = delim; + had_char_class = false; + } + } + else + { + had_char_class = false; + BUF_PUSH(c); + laststart[5]++; /* Update the length of characters */ + range_start = c; + } + } + +#else /* BYTE */ + /* Ensure that we have enough space to push a charset: the + opcode, the length count, and the bitset; 34 bytes in all. */ + GET_BUFFER_SPACE (34); + + laststart = b; + + /* We test `*p == '^' twice, instead of using an if + statement, so we only need one BUF_PUSH. */ + BUF_PUSH (*p == '^' ? charset_not : charset); + if (*p == '^') + p++; + + /* Remember the first position in the bracket expression. */ + p1 = p; + + /* Push the number of bytes in the bitmap. */ + BUF_PUSH ((1 << BYTEWIDTH) / BYTEWIDTH); + + /* Clear the whole map. */ + bzero (b, (1 << BYTEWIDTH) / BYTEWIDTH); + + /* charset_not matches newline according to a syntax bit. */ + if ((re_opcode_t) b[-2] == charset_not + && (syntax & RE_HAT_LISTS_NOT_NEWLINE)) + SET_LIST_BIT ('\n'); + + /* Read in characters and ranges, setting map bits. */ + for (;;) + { + if (p == pend) FREE_STACK_RETURN (REG_EBRACK); + + PATFETCH (c); + + /* \ might escape characters inside [...] and [^...]. */ + if ((syntax & RE_BACKSLASH_ESCAPE_IN_LISTS) && c == '\\') + { + if (p == pend) FREE_STACK_RETURN (REG_EESCAPE); + + PATFETCH (c1); + SET_LIST_BIT (c1); + range_start = c1; + continue; + } + + /* Could be the end of the bracket expression. If it's + not (i.e., when the bracket expression is `[]' so + far), the ']' character bit gets set way below. */ + if (c == ']' && p != p1 + 1) + break; + + /* Look ahead to see if it's a range when the last thing + was a character class. */ + if (had_char_class && c == '-' && *p != ']') + FREE_STACK_RETURN (REG_ERANGE); + + /* Look ahead to see if it's a range when the last thing + was a character: if this is a hyphen not at the + beginning or the end of a list, then it's the range + operator. */ + if (c == '-' + && !(p - 2 >= pattern && p[-2] == '[') + && !(p - 3 >= pattern && p[-3] == '[' && p[-2] == '^') + && *p != ']') + { + reg_errcode_t ret + = byte_compile_range (range_start, &p, pend, translate, + syntax, b); + if (ret != REG_NOERROR) FREE_STACK_RETURN (ret); + range_start = 0xffffffff; + } + + else if (p[0] == '-' && p[1] != ']') + { /* This handles ranges made up of characters only. */ + reg_errcode_t ret; + + /* Move past the `-'. */ + PATFETCH (c1); + + ret = byte_compile_range (c, &p, pend, translate, syntax, b); + if (ret != REG_NOERROR) FREE_STACK_RETURN (ret); + range_start = 0xffffffff; + } + + /* See if we're at the beginning of a possible character + class. */ + + else if (syntax & RE_CHAR_CLASSES && c == '[' && *p == ':') + { /* Leave room for the null. */ + char str[CHAR_CLASS_MAX_LENGTH + 1]; + + PATFETCH (c); + c1 = 0; + + /* If pattern is `[[:'. */ + if (p == pend) FREE_STACK_RETURN (REG_EBRACK); + + for (;;) + { + PATFETCH (c); + if ((c == ':' && *p == ']') || p == pend) + break; + if (c1 < CHAR_CLASS_MAX_LENGTH) + str[c1++] = c; + else + /* This is in any case an invalid class name. */ + str[0] = '\0'; + } + str[c1] = '\0'; + + /* If isn't a word bracketed by `[:' and `:]': + undo the ending character, the letters, and leave + the leading `:' and `[' (but set bits for them). */ + if (c == ':' && *p == ']') + { +# if defined _LIBC || WIDE_CHAR_SUPPORT + boolean is_lower = STREQ (str, "lower"); + boolean is_upper = STREQ (str, "upper"); + wctype_t wt; + int ch; + + wt = IS_CHAR_CLASS (str); + if (wt == 0) + FREE_STACK_RETURN (REG_ECTYPE); + + /* Throw away the ] at the end of the character + class. */ + PATFETCH (c); + + if (p == pend) FREE_STACK_RETURN (REG_EBRACK); + + for (ch = 0; ch < 1 << BYTEWIDTH; ++ch) + { +# ifdef _LIBC + if (__iswctype (__btowc (ch), wt)) + SET_LIST_BIT (ch); +# else + if (iswctype (btowc (ch), wt)) + SET_LIST_BIT (ch); +# endif + + if (translate && (is_upper || is_lower) + && (ISUPPER (ch) || ISLOWER (ch))) + SET_LIST_BIT (ch); + } + + had_char_class = true; +# else + int ch; + boolean is_alnum = STREQ (str, "alnum"); + boolean is_alpha = STREQ (str, "alpha"); + boolean is_blank = STREQ (str, "blank"); + boolean is_cntrl = STREQ (str, "cntrl"); + boolean is_digit = STREQ (str, "digit"); + boolean is_graph = STREQ (str, "graph"); + boolean is_lower = STREQ (str, "lower"); + boolean is_print = STREQ (str, "print"); + boolean is_punct = STREQ (str, "punct"); + boolean is_space = STREQ (str, "space"); + boolean is_upper = STREQ (str, "upper"); + boolean is_xdigit = STREQ (str, "xdigit"); + + if (!IS_CHAR_CLASS (str)) + FREE_STACK_RETURN (REG_ECTYPE); + + /* Throw away the ] at the end of the character + class. */ + PATFETCH (c); + + if (p == pend) FREE_STACK_RETURN (REG_EBRACK); + + for (ch = 0; ch < 1 << BYTEWIDTH; ch++) + { + /* This was split into 3 if's to + avoid an arbitrary limit in some compiler. */ + if ( (is_alnum && ISALNUM (ch)) + || (is_alpha && ISALPHA (ch)) + || (is_blank && ISBLANK (ch)) + || (is_cntrl && ISCNTRL (ch))) + SET_LIST_BIT (ch); + if ( (is_digit && ISDIGIT (ch)) + || (is_graph && ISGRAPH (ch)) + || (is_lower && ISLOWER (ch)) + || (is_print && ISPRINT (ch))) + SET_LIST_BIT (ch); + if ( (is_punct && ISPUNCT (ch)) + || (is_space && ISSPACE (ch)) + || (is_upper && ISUPPER (ch)) + || (is_xdigit && ISXDIGIT (ch))) + SET_LIST_BIT (ch); + if ( translate && (is_upper || is_lower) + && (ISUPPER (ch) || ISLOWER (ch))) + SET_LIST_BIT (ch); + } + had_char_class = true; +# endif /* libc || wctype.h */ + } + else + { + c1++; + while (c1--) + PATUNFETCH; + SET_LIST_BIT ('['); + SET_LIST_BIT (':'); + range_start = ':'; + had_char_class = false; + } + } + else if (syntax & RE_CHAR_CLASSES && c == '[' && *p == '=') + { + unsigned char str[MB_LEN_MAX + 1]; +# ifdef _LIBC + uint32_t nrules = + _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES); +# endif + + PATFETCH (c); + c1 = 0; + + /* If pattern is `[[='. */ + if (p == pend) FREE_STACK_RETURN (REG_EBRACK); + + for (;;) + { + PATFETCH (c); + if ((c == '=' && *p == ']') || p == pend) + break; + if (c1 < MB_LEN_MAX) + str[c1++] = c; + else + /* This is in any case an invalid class name. */ + str[0] = '\0'; + } + str[c1] = '\0'; + + if (c == '=' && *p == ']' && str[0] != '\0') + { + /* If we have no collation data we use the default + collation in which each character is in a class + by itself. It also means that ASCII is the + character set and therefore we cannot have character + with more than one byte in the multibyte + representation. */ +# ifdef _LIBC + if (nrules == 0) +# endif + { + if (c1 != 1) + FREE_STACK_RETURN (REG_ECOLLATE); + + /* Throw away the ] at the end of the equivalence + class. */ + PATFETCH (c); + + /* Set the bit for the character. */ + SET_LIST_BIT (str[0]); + } +# ifdef _LIBC + else + { + /* Try to match the byte sequence in `str' against + those known to the collate implementation. + First find out whether the bytes in `str' are + actually from exactly one character. */ + const int32_t *table; + const unsigned char *weights; + const unsigned char *extra; + const int32_t *indirect; + int32_t idx; + const unsigned char *cp = str; + int ch; + + /* This #include defines a local function! */ +# include + + table = (const int32_t *) + _NL_CURRENT (LC_COLLATE, _NL_COLLATE_TABLEMB); + weights = (const unsigned char *) + _NL_CURRENT (LC_COLLATE, _NL_COLLATE_WEIGHTMB); + extra = (const unsigned char *) + _NL_CURRENT (LC_COLLATE, _NL_COLLATE_EXTRAMB); + indirect = (const int32_t *) + _NL_CURRENT (LC_COLLATE, _NL_COLLATE_INDIRECTMB); + + idx = findidx (&cp); + if (idx == 0 || cp < str + c1) + /* This is no valid character. */ + FREE_STACK_RETURN (REG_ECOLLATE); + + /* Throw away the ] at the end of the equivalence + class. */ + PATFETCH (c); + + /* Now we have to go throught the whole table + and find all characters which have the same + first level weight. + + XXX Note that this is not entirely correct. + we would have to match multibyte sequences + but this is not possible with the current + implementation. */ + for (ch = 1; ch < 256; ++ch) + /* XXX This test would have to be changed if we + would allow matching multibyte sequences. */ + if (table[ch] > 0) + { + int32_t idx2 = table[ch]; + size_t len = weights[idx2]; + + /* Test whether the lenghts match. */ + if (weights[idx] == len) + { + /* They do. New compare the bytes of + the weight. */ + size_t cnt = 0; + + while (cnt < len + && (weights[idx + 1 + cnt] + == weights[idx2 + 1 + cnt])) + ++cnt; + + if (cnt == len) + /* They match. Mark the character as + acceptable. */ + SET_LIST_BIT (ch); + } + } + } +# endif + had_char_class = true; + } + else + { + c1++; + while (c1--) + PATUNFETCH; + SET_LIST_BIT ('['); + SET_LIST_BIT ('='); + range_start = '='; + had_char_class = false; + } + } + else if (syntax & RE_CHAR_CLASSES && c == '[' && *p == '.') + { + unsigned char str[128]; /* Should be large enough. */ +# ifdef _LIBC + uint32_t nrules = + _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES); +# endif + + PATFETCH (c); + c1 = 0; + + /* If pattern is `[[.'. */ + if (p == pend) FREE_STACK_RETURN (REG_EBRACK); + + for (;;) + { + PATFETCH (c); + if ((c == '.' && *p == ']') || p == pend) + break; + if (c1 < sizeof (str)) + str[c1++] = c; + else + /* This is in any case an invalid class name. */ + str[0] = '\0'; + } + str[c1] = '\0'; + + if (c == '.' && *p == ']' && str[0] != '\0') + { + /* If we have no collation data we use the default + collation in which each character is the name + for its own class which contains only the one + character. It also means that ASCII is the + character set and therefore we cannot have character + with more than one byte in the multibyte + representation. */ +# ifdef _LIBC + if (nrules == 0) +# endif + { + if (c1 != 1) + FREE_STACK_RETURN (REG_ECOLLATE); + + /* Throw away the ] at the end of the equivalence + class. */ + PATFETCH (c); + + /* Set the bit for the character. */ + SET_LIST_BIT (str[0]); + range_start = ((const unsigned char *) str)[0]; + } +# ifdef _LIBC + else + { + /* Try to match the byte sequence in `str' against + those known to the collate implementation. + First find out whether the bytes in `str' are + actually from exactly one character. */ + int32_t table_size; + const int32_t *symb_table; + const unsigned char *extra; + int32_t idx; + int32_t elem; + int32_t second; + int32_t hash; + + table_size = + _NL_CURRENT_WORD (LC_COLLATE, + _NL_COLLATE_SYMB_HASH_SIZEMB); + symb_table = (const int32_t *) + _NL_CURRENT (LC_COLLATE, + _NL_COLLATE_SYMB_TABLEMB); + extra = (const unsigned char *) + _NL_CURRENT (LC_COLLATE, + _NL_COLLATE_SYMB_EXTRAMB); + + /* Locate the character in the hashing table. */ + hash = elem_hash (str, c1); + + idx = 0; + elem = hash % table_size; + second = hash % (table_size - 2); + while (symb_table[2 * elem] != 0) + { + /* First compare the hashing value. */ + if (symb_table[2 * elem] == hash + && c1 == extra[symb_table[2 * elem + 1]] + && memcmp (str, + &extra[symb_table[2 * elem + 1] + + 1], + c1) == 0) + { + /* Yep, this is the entry. */ + idx = symb_table[2 * elem + 1]; + idx += 1 + extra[idx]; + break; + } + + /* Next entry. */ + elem += second; + } + + if (symb_table[2 * elem] == 0) + /* This is no valid character. */ + FREE_STACK_RETURN (REG_ECOLLATE); + + /* Throw away the ] at the end of the equivalence + class. */ + PATFETCH (c); + + /* Now add the multibyte character(s) we found + to the accept list. + + XXX Note that this is not entirely correct. + we would have to match multibyte sequences + but this is not possible with the current + implementation. Also, we have to match + collating symbols, which expand to more than + one file, as a whole and not allow the + individual bytes. */ + c1 = extra[idx++]; + if (c1 == 1) + range_start = extra[idx]; + while (c1-- > 0) + { + SET_LIST_BIT (extra[idx]); + ++idx; + } + } +# endif + had_char_class = false; + } + else + { + c1++; + while (c1--) + PATUNFETCH; + SET_LIST_BIT ('['); + SET_LIST_BIT ('.'); + range_start = '.'; + had_char_class = false; + } + } + else + { + had_char_class = false; + SET_LIST_BIT (c); + range_start = c; + } + } + + /* Discard any (non)matching list bytes that are all 0 at the + end of the map. Decrease the map-length byte too. */ + while ((int) b[-1] > 0 && b[b[-1] - 1] == 0) + b[-1]--; + b += b[-1]; +#endif /* WCHAR */ + } + break; + + + case '(': + if (syntax & RE_NO_BK_PARENS) + goto handle_open; + else + goto normal_char; + + + case ')': + if (syntax & RE_NO_BK_PARENS) + goto handle_close; + else + goto normal_char; + + + case '\n': + if (syntax & RE_NEWLINE_ALT) + goto handle_alt; + else + goto normal_char; + + + case '|': + if (syntax & RE_NO_BK_VBAR) + goto handle_alt; + else + goto normal_char; + + + case '{': + if (syntax & RE_INTERVALS && syntax & RE_NO_BK_BRACES) + goto handle_interval; + else + goto normal_char; + + + case '\\': + if (p == pend) FREE_STACK_RETURN (REG_EESCAPE); + + /* Do not translate the character after the \, so that we can + distinguish, e.g., \B from \b, even if we normally would + translate, e.g., B to b. */ + PATFETCH_RAW (c); + + switch (c) + { + case '(': + if (syntax & RE_NO_BK_PARENS) + goto normal_backslash; + + handle_open: + bufp->re_nsub++; + regnum++; + + if (COMPILE_STACK_FULL) + { + RETALLOC (compile_stack.stack, compile_stack.size << 1, + compile_stack_elt_t); + if (compile_stack.stack == NULL) return REG_ESPACE; + + compile_stack.size <<= 1; + } + + /* These are the values to restore when we hit end of this + group. They are all relative offsets, so that if the + whole pattern moves because of realloc, they will still + be valid. */ + COMPILE_STACK_TOP.begalt_offset = begalt - COMPILED_BUFFER_VAR; + COMPILE_STACK_TOP.fixup_alt_jump + = fixup_alt_jump ? fixup_alt_jump - COMPILED_BUFFER_VAR + 1 : 0; + COMPILE_STACK_TOP.laststart_offset = b - COMPILED_BUFFER_VAR; + COMPILE_STACK_TOP.regnum = regnum; + + /* We will eventually replace the 0 with the number of + groups inner to this one. But do not push a + start_memory for groups beyond the last one we can + represent in the compiled pattern. */ + if (regnum <= MAX_REGNUM) + { + COMPILE_STACK_TOP.inner_group_offset = b + - COMPILED_BUFFER_VAR + 2; + BUF_PUSH_3 (start_memory, regnum, 0); + } + + compile_stack.avail++; + + fixup_alt_jump = 0; + laststart = 0; + begalt = b; + /* If we've reached MAX_REGNUM groups, then this open + won't actually generate any code, so we'll have to + clear pending_exact explicitly. */ + pending_exact = 0; + break; + + + case ')': + if (syntax & RE_NO_BK_PARENS) goto normal_backslash; + + if (COMPILE_STACK_EMPTY) + { + if (syntax & RE_UNMATCHED_RIGHT_PAREN_ORD) + goto normal_backslash; + else + FREE_STACK_RETURN (REG_ERPAREN); + } + + handle_close: + if (fixup_alt_jump) + { /* Push a dummy failure point at the end of the + alternative for a possible future + `pop_failure_jump' to pop. See comments at + `push_dummy_failure' in `re_match_2'. */ + BUF_PUSH (push_dummy_failure); + + /* We allocated space for this jump when we assigned + to `fixup_alt_jump', in the `handle_alt' case below. */ + STORE_JUMP (jump_past_alt, fixup_alt_jump, b - 1); + } + + /* See similar code for backslashed left paren above. */ + if (COMPILE_STACK_EMPTY) + { + if (syntax & RE_UNMATCHED_RIGHT_PAREN_ORD) + goto normal_char; + else + FREE_STACK_RETURN (REG_ERPAREN); + } + + /* Since we just checked for an empty stack above, this + ``can't happen''. */ + assert (compile_stack.avail != 0); + { + /* We don't just want to restore into `regnum', because + later groups should continue to be numbered higher, + as in `(ab)c(de)' -- the second group is #2. */ + regnum_t this_group_regnum; + + compile_stack.avail--; + begalt = COMPILED_BUFFER_VAR + COMPILE_STACK_TOP.begalt_offset; + fixup_alt_jump + = COMPILE_STACK_TOP.fixup_alt_jump + ? COMPILED_BUFFER_VAR + COMPILE_STACK_TOP.fixup_alt_jump - 1 + : 0; + laststart = COMPILED_BUFFER_VAR + COMPILE_STACK_TOP.laststart_offset; + this_group_regnum = COMPILE_STACK_TOP.regnum; + /* If we've reached MAX_REGNUM groups, then this open + won't actually generate any code, so we'll have to + clear pending_exact explicitly. */ + pending_exact = 0; + + /* We're at the end of the group, so now we know how many + groups were inside this one. */ + if (this_group_regnum <= MAX_REGNUM) + { + UCHAR_T *inner_group_loc + = COMPILED_BUFFER_VAR + COMPILE_STACK_TOP.inner_group_offset; + + *inner_group_loc = regnum - this_group_regnum; + BUF_PUSH_3 (stop_memory, this_group_regnum, + regnum - this_group_regnum); + } + } + break; + + + case '|': /* `\|'. */ + if (syntax & RE_LIMITED_OPS || syntax & RE_NO_BK_VBAR) + goto normal_backslash; + handle_alt: + if (syntax & RE_LIMITED_OPS) + goto normal_char; + + /* Insert before the previous alternative a jump which + jumps to this alternative if the former fails. */ + GET_BUFFER_SPACE (1 + OFFSET_ADDRESS_SIZE); + INSERT_JUMP (on_failure_jump, begalt, + b + 2 + 2 * OFFSET_ADDRESS_SIZE); + pending_exact = 0; + b += 1 + OFFSET_ADDRESS_SIZE; + + /* The alternative before this one has a jump after it + which gets executed if it gets matched. Adjust that + jump so it will jump to this alternative's analogous + jump (put in below, which in turn will jump to the next + (if any) alternative's such jump, etc.). The last such + jump jumps to the correct final destination. A picture: + _____ _____ + | | | | + | v | v + a | b | c + + If we are at `b', then fixup_alt_jump right now points to a + three-byte space after `a'. We'll put in the jump, set + fixup_alt_jump to right after `b', and leave behind three + bytes which we'll fill in when we get to after `c'. */ + + if (fixup_alt_jump) + STORE_JUMP (jump_past_alt, fixup_alt_jump, b); + + /* Mark and leave space for a jump after this alternative, + to be filled in later either by next alternative or + when know we're at the end of a series of alternatives. */ + fixup_alt_jump = b; + GET_BUFFER_SPACE (1 + OFFSET_ADDRESS_SIZE); + b += 1 + OFFSET_ADDRESS_SIZE; + + laststart = 0; + begalt = b; + break; + + + case '{': + /* If \{ is a literal. */ + if (!(syntax & RE_INTERVALS) + /* If we're at `\{' and it's not the open-interval + operator. */ + || (syntax & RE_NO_BK_BRACES)) + goto normal_backslash; + + handle_interval: + { + /* If got here, then the syntax allows intervals. */ + + /* At least (most) this many matches must be made. */ + int lower_bound = -1, upper_bound = -1; + + /* Place in the uncompiled pattern (i.e., just after + the '{') to go back to if the interval is invalid. */ + const CHAR_T *beg_interval = p; + + if (p == pend) + goto invalid_interval; + + GET_UNSIGNED_NUMBER (lower_bound); + + if (c == ',') + { + GET_UNSIGNED_NUMBER (upper_bound); + if (upper_bound < 0) + upper_bound = RE_DUP_MAX; + } + else + /* Interval such as `{1}' => match exactly once. */ + upper_bound = lower_bound; + + if (! (0 <= lower_bound && lower_bound <= upper_bound)) + goto invalid_interval; + + if (!(syntax & RE_NO_BK_BRACES)) + { + if (c != '\\' || p == pend) + goto invalid_interval; + PATFETCH (c); + } + + if (c != '}') + goto invalid_interval; + + /* If it's invalid to have no preceding re. */ + if (!laststart) + { + if (syntax & RE_CONTEXT_INVALID_OPS + && !(syntax & RE_INVALID_INTERVAL_ORD)) + FREE_STACK_RETURN (REG_BADRPT); + else if (syntax & RE_CONTEXT_INDEP_OPS) + laststart = b; + else + goto unfetch_interval; + } + + /* We just parsed a valid interval. */ + + if (RE_DUP_MAX < upper_bound) + FREE_STACK_RETURN (REG_BADBR); + + /* If the upper bound is zero, don't want to succeed at + all; jump from `laststart' to `b + 3', which will be + the end of the buffer after we insert the jump. */ + /* ifdef WCHAR, 'b + 1 + OFFSET_ADDRESS_SIZE' + instead of 'b + 3'. */ + if (upper_bound == 0) + { + GET_BUFFER_SPACE (1 + OFFSET_ADDRESS_SIZE); + INSERT_JUMP (jump, laststart, b + 1 + + OFFSET_ADDRESS_SIZE); + b += 1 + OFFSET_ADDRESS_SIZE; + } + + /* Otherwise, we have a nontrivial interval. When + we're all done, the pattern will look like: + set_number_at + set_number_at + succeed_n + + jump_n + (The upper bound and `jump_n' are omitted if + `upper_bound' is 1, though.) */ + else + { /* If the upper bound is > 1, we need to insert + more at the end of the loop. */ + unsigned nbytes = 2 + 4 * OFFSET_ADDRESS_SIZE + + (upper_bound > 1) * (2 + 4 * OFFSET_ADDRESS_SIZE); + + GET_BUFFER_SPACE (nbytes); + + /* Initialize lower bound of the `succeed_n', even + though it will be set during matching by its + attendant `set_number_at' (inserted next), + because `re_compile_fastmap' needs to know. + Jump to the `jump_n' we might insert below. */ + INSERT_JUMP2 (succeed_n, laststart, + b + 1 + 2 * OFFSET_ADDRESS_SIZE + + (upper_bound > 1) * (1 + 2 * OFFSET_ADDRESS_SIZE) + , lower_bound); + b += 1 + 2 * OFFSET_ADDRESS_SIZE; + + /* Code to initialize the lower bound. Insert + before the `succeed_n'. The `5' is the last two + bytes of this `set_number_at', plus 3 bytes of + the following `succeed_n'. */ + /* ifdef WCHAR, The '1+2*OFFSET_ADDRESS_SIZE' + is the 'set_number_at', plus '1+OFFSET_ADDRESS_SIZE' + of the following `succeed_n'. */ + PREFIX(insert_op2) (set_number_at, laststart, 1 + + 2 * OFFSET_ADDRESS_SIZE, lower_bound, b); + b += 1 + 2 * OFFSET_ADDRESS_SIZE; + + if (upper_bound > 1) + { /* More than one repetition is allowed, so + append a backward jump to the `succeed_n' + that starts this interval. + + When we've reached this during matching, + we'll have matched the interval once, so + jump back only `upper_bound - 1' times. */ + STORE_JUMP2 (jump_n, b, laststart + + 2 * OFFSET_ADDRESS_SIZE + 1, + upper_bound - 1); + b += 1 + 2 * OFFSET_ADDRESS_SIZE; + + /* The location we want to set is the second + parameter of the `jump_n'; that is `b-2' as + an absolute address. `laststart' will be + the `set_number_at' we're about to insert; + `laststart+3' the number to set, the source + for the relative address. But we are + inserting into the middle of the pattern -- + so everything is getting moved up by 5. + Conclusion: (b - 2) - (laststart + 3) + 5, + i.e., b - laststart. + + We insert this at the beginning of the loop + so that if we fail during matching, we'll + reinitialize the bounds. */ + PREFIX(insert_op2) (set_number_at, laststart, + b - laststart, + upper_bound - 1, b); + b += 1 + 2 * OFFSET_ADDRESS_SIZE; + } + } + pending_exact = 0; + break; + + invalid_interval: + if (!(syntax & RE_INVALID_INTERVAL_ORD)) + FREE_STACK_RETURN (p == pend ? REG_EBRACE : REG_BADBR); + unfetch_interval: + /* Match the characters as literals. */ + p = beg_interval; + c = '{'; + if (syntax & RE_NO_BK_BRACES) + goto normal_char; + else + goto normal_backslash; + } + +#ifdef emacs + /* There is no way to specify the before_dot and after_dot + operators. rms says this is ok. --karl */ + case '=': + BUF_PUSH (at_dot); + break; + + case 's': + laststart = b; + PATFETCH (c); + BUF_PUSH_2 (syntaxspec, syntax_spec_code[c]); + break; + + case 'S': + laststart = b; + PATFETCH (c); + BUF_PUSH_2 (notsyntaxspec, syntax_spec_code[c]); + break; +#endif /* emacs */ + + + case 'w': + if (syntax & RE_NO_GNU_OPS) + goto normal_char; + laststart = b; + BUF_PUSH (wordchar); + break; + + + case 'W': + if (syntax & RE_NO_GNU_OPS) + goto normal_char; + laststart = b; + BUF_PUSH (notwordchar); + break; + + + case '<': + if (syntax & RE_NO_GNU_OPS) + goto normal_char; + BUF_PUSH (wordbeg); + break; + + case '>': + if (syntax & RE_NO_GNU_OPS) + goto normal_char; + BUF_PUSH (wordend); + break; + + case 'b': + if (syntax & RE_NO_GNU_OPS) + goto normal_char; + BUF_PUSH (wordbound); + break; + + case 'B': + if (syntax & RE_NO_GNU_OPS) + goto normal_char; + BUF_PUSH (notwordbound); + break; + + case '`': + if (syntax & RE_NO_GNU_OPS) + goto normal_char; + BUF_PUSH (begbuf); + break; + + case '\'': + if (syntax & RE_NO_GNU_OPS) + goto normal_char; + BUF_PUSH (endbuf); + break; + + case '1': case '2': case '3': case '4': case '5': + case '6': case '7': case '8': case '9': + if (syntax & RE_NO_BK_REFS) + goto normal_char; + + c1 = c - '0'; + + if (c1 > regnum) + FREE_STACK_RETURN (REG_ESUBREG); + + /* Can't back reference to a subexpression if inside of it. */ + if (group_in_compile_stack (compile_stack, (regnum_t) c1)) + goto normal_char; + + laststart = b; + BUF_PUSH_2 (duplicate, c1); + break; + + + case '+': + case '?': + if (syntax & RE_BK_PLUS_QM) + goto handle_plus; + else + goto normal_backslash; + + default: + normal_backslash: + /* You might think it would be useful for \ to mean + not to translate; but if we don't translate it + it will never match anything. */ + c = TRANSLATE (c); + goto normal_char; + } + break; + + + default: + /* Expects the character in `c'. */ + normal_char: + /* If no exactn currently being built. */ + if (!pending_exact +#ifdef WCHAR + /* If last exactn handle binary(or character) and + new exactn handle character(or binary). */ + || is_exactn_bin != is_binary[p - 1 - pattern] +#endif /* WCHAR */ + + /* If last exactn not at current position. */ + || pending_exact + *pending_exact + 1 != b + + /* We have only one byte following the exactn for the count. */ + || *pending_exact == (1 << BYTEWIDTH) - 1 + + /* If followed by a repetition operator. */ + || *p == '*' || *p == '^' + || ((syntax & RE_BK_PLUS_QM) + ? *p == '\\' && (p[1] == '+' || p[1] == '?') + : (*p == '+' || *p == '?')) + || ((syntax & RE_INTERVALS) + && ((syntax & RE_NO_BK_BRACES) + ? *p == '{' + : (p[0] == '\\' && p[1] == '{')))) + { + /* Start building a new exactn. */ + + laststart = b; + +#ifdef WCHAR + /* Is this exactn binary data or character? */ + is_exactn_bin = is_binary[p - 1 - pattern]; + if (is_exactn_bin) + BUF_PUSH_2 (exactn_bin, 0); + else + BUF_PUSH_2 (exactn, 0); +#else + BUF_PUSH_2 (exactn, 0); +#endif /* WCHAR */ + pending_exact = b - 1; + } + + BUF_PUSH (c); + (*pending_exact)++; + break; + } /* switch (c) */ + } /* while p != pend */ + + + /* Through the pattern now. */ + + if (fixup_alt_jump) + STORE_JUMP (jump_past_alt, fixup_alt_jump, b); + + if (!COMPILE_STACK_EMPTY) + FREE_STACK_RETURN (REG_EPAREN); + + /* If we don't want backtracking, force success + the first time we reach the end of the compiled pattern. */ + if (syntax & RE_NO_POSIX_BACKTRACKING) + BUF_PUSH (succeed); + +#ifdef WCHAR + free (pattern); + free (mbs_offset); + free (is_binary); +#endif + free (compile_stack.stack); + + /* We have succeeded; set the length of the buffer. */ +#ifdef WCHAR + bufp->used = (uintptr_t) b - (uintptr_t) COMPILED_BUFFER_VAR; +#else + bufp->used = b - bufp->buffer; +#endif + +#ifdef DEBUG + if (debug) + { + DEBUG_PRINT1 ("\nCompiled pattern: \n"); + PREFIX(print_compiled_pattern) (bufp); + } +#endif /* DEBUG */ + +#ifndef MATCH_MAY_ALLOCATE + /* Initialize the failure stack to the largest possible stack. This + isn't necessary unless we're trying to avoid calling alloca in + the search and match routines. */ + { + int num_regs = bufp->re_nsub + 1; + + /* Since DOUBLE_FAIL_STACK refuses to double only if the current size + is strictly greater than re_max_failures, the largest possible stack + is 2 * re_max_failures failure points. */ + if (fail_stack.size < (2 * re_max_failures * MAX_FAILURE_ITEMS)) + { + fail_stack.size = (2 * re_max_failures * MAX_FAILURE_ITEMS); + +# ifdef emacs + if (! fail_stack.stack) + fail_stack.stack + = (PREFIX(fail_stack_elt_t) *) xmalloc (fail_stack.size + * sizeof (PREFIX(fail_stack_elt_t))); + else + fail_stack.stack + = (PREFIX(fail_stack_elt_t) *) xrealloc (fail_stack.stack, + (fail_stack.size + * sizeof (PREFIX(fail_stack_elt_t)))); +# else /* not emacs */ + if (! fail_stack.stack) + fail_stack.stack + = (PREFIX(fail_stack_elt_t) *) malloc (fail_stack.size + * sizeof (PREFIX(fail_stack_elt_t))); + else + fail_stack.stack + = (PREFIX(fail_stack_elt_t) *) realloc (fail_stack.stack, + (fail_stack.size + * sizeof (PREFIX(fail_stack_elt_t)))); +# endif /* not emacs */ + } + + PREFIX(regex_grow_registers) (num_regs); + } +#endif /* not MATCH_MAY_ALLOCATE */ + + return REG_NOERROR; +} /* regex_compile */ + +/* Subroutines for `regex_compile'. */ + +/* Store OP at LOC followed by two-byte integer parameter ARG. */ +/* ifdef WCHAR, integer parameter is 1 wchar_t. */ + +static void +PREFIX(store_op1) (op, loc, arg) + re_opcode_t op; + UCHAR_T *loc; + int arg; +{ + *loc = (UCHAR_T) op; + STORE_NUMBER (loc + 1, arg); +} + + +/* Like `store_op1', but for two two-byte parameters ARG1 and ARG2. */ +/* ifdef WCHAR, integer parameter is 1 wchar_t. */ + +static void +PREFIX(store_op2) (op, loc, arg1, arg2) + re_opcode_t op; + UCHAR_T *loc; + int arg1, arg2; +{ + *loc = (UCHAR_T) op; + STORE_NUMBER (loc + 1, arg1); + STORE_NUMBER (loc + 1 + OFFSET_ADDRESS_SIZE, arg2); +} + + +/* Copy the bytes from LOC to END to open up three bytes of space at LOC + for OP followed by two-byte integer parameter ARG. */ +/* ifdef WCHAR, integer parameter is 1 wchar_t. */ + +static void +PREFIX(insert_op1) (op, loc, arg, end) + re_opcode_t op; + UCHAR_T *loc; + int arg; + UCHAR_T *end; +{ + register UCHAR_T *pfrom = end; + register UCHAR_T *pto = end + 1 + OFFSET_ADDRESS_SIZE; + + while (pfrom != loc) + *--pto = *--pfrom; + + PREFIX(store_op1) (op, loc, arg); +} + + +/* Like `insert_op1', but for two two-byte parameters ARG1 and ARG2. */ +/* ifdef WCHAR, integer parameter is 1 wchar_t. */ + +static void +PREFIX(insert_op2) (op, loc, arg1, arg2, end) + re_opcode_t op; + UCHAR_T *loc; + int arg1, arg2; + UCHAR_T *end; +{ + register UCHAR_T *pfrom = end; + register UCHAR_T *pto = end + 1 + 2 * OFFSET_ADDRESS_SIZE; + + while (pfrom != loc) + *--pto = *--pfrom; + + PREFIX(store_op2) (op, loc, arg1, arg2); +} + + +/* P points to just after a ^ in PATTERN. Return true if that ^ comes + after an alternative or a begin-subexpression. We assume there is at + least one character before the ^. */ + +static boolean +PREFIX(at_begline_loc_p) (pattern, p, syntax) + const CHAR_T *pattern, *p; + reg_syntax_t syntax; +{ + const CHAR_T *prev = p - 2; + boolean prev_prev_backslash = prev > pattern && prev[-1] == '\\'; + + return + /* After a subexpression? */ + (*prev == '(' && (syntax & RE_NO_BK_PARENS || prev_prev_backslash)) + /* After an alternative? */ + || (*prev == '|' && (syntax & RE_NO_BK_VBAR || prev_prev_backslash)); +} + + +/* The dual of at_begline_loc_p. This one is for $. We assume there is + at least one character after the $, i.e., `P < PEND'. */ + +static boolean +PREFIX(at_endline_loc_p) (p, pend, syntax) + const CHAR_T *p, *pend; + reg_syntax_t syntax; +{ + const CHAR_T *next = p; + boolean next_backslash = *next == '\\'; + const CHAR_T *next_next = p + 1 < pend ? p + 1 : 0; + + return + /* Before a subexpression? */ + (syntax & RE_NO_BK_PARENS ? *next == ')' + : next_backslash && next_next && *next_next == ')') + /* Before an alternative? */ + || (syntax & RE_NO_BK_VBAR ? *next == '|' + : next_backslash && next_next && *next_next == '|'); +} + +#else /* not INSIDE_RECURSION */ + +/* Returns true if REGNUM is in one of COMPILE_STACK's elements and + false if it's not. */ + +static boolean +group_in_compile_stack (compile_stack, regnum) + compile_stack_type compile_stack; + regnum_t regnum; +{ + int this_element; + + for (this_element = compile_stack.avail - 1; + this_element >= 0; + this_element--) + if (compile_stack.stack[this_element].regnum == regnum) + return true; + + return false; +} +#endif /* not INSIDE_RECURSION */ + +#ifdef INSIDE_RECURSION + +#ifdef WCHAR +/* This insert space, which size is "num", into the pattern at "loc". + "end" must point the end of the allocated buffer. */ +static void +insert_space (num, loc, end) + int num; + CHAR_T *loc; + CHAR_T *end; +{ + register CHAR_T *pto = end; + register CHAR_T *pfrom = end - num; + + while (pfrom >= loc) + *pto-- = *pfrom--; +} +#endif /* WCHAR */ + +#ifdef WCHAR +static reg_errcode_t +wcs_compile_range (range_start_char, p_ptr, pend, translate, syntax, b, + char_set) + CHAR_T range_start_char; + const CHAR_T **p_ptr, *pend; + CHAR_T *char_set, *b; + RE_TRANSLATE_TYPE translate; + reg_syntax_t syntax; +{ + const CHAR_T *p = *p_ptr; + CHAR_T range_start, range_end; + reg_errcode_t ret; +# ifdef _LIBC + uint32_t nrules; + uint32_t start_val, end_val; +# endif + if (p == pend) + return REG_ERANGE; + +# ifdef _LIBC + nrules = _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES); + if (nrules != 0) + { + const char *collseq = (const char *) _NL_CURRENT(LC_COLLATE, + _NL_COLLATE_COLLSEQWC); + const unsigned char *extra = (const unsigned char *) + _NL_CURRENT (LC_COLLATE, _NL_COLLATE_SYMB_EXTRAMB); + + if (range_start_char < -1) + { + /* range_start is a collating symbol. */ + int32_t *wextra; + /* Retreive the index and get collation sequence value. */ + wextra = (int32_t*)(extra + char_set[-range_start_char]); + start_val = wextra[1 + *wextra]; + } + else + start_val = collseq_table_lookup(collseq, TRANSLATE(range_start_char)); + + end_val = collseq_table_lookup (collseq, TRANSLATE (p[0])); + + /* Report an error if the range is empty and the syntax prohibits + this. */ + ret = ((syntax & RE_NO_EMPTY_RANGES) + && (start_val > end_val))? REG_ERANGE : REG_NOERROR; + + /* Insert space to the end of the char_ranges. */ + insert_space(2, b - char_set[5] - 2, b - 1); + *(b - char_set[5] - 2) = (wchar_t)start_val; + *(b - char_set[5] - 1) = (wchar_t)end_val; + char_set[4]++; /* ranges_index */ + } + else +# endif + { + range_start = (range_start_char >= 0)? TRANSLATE (range_start_char): + range_start_char; + range_end = TRANSLATE (p[0]); + /* Report an error if the range is empty and the syntax prohibits + this. */ + ret = ((syntax & RE_NO_EMPTY_RANGES) + && (range_start > range_end))? REG_ERANGE : REG_NOERROR; + + /* Insert space to the end of the char_ranges. */ + insert_space(2, b - char_set[5] - 2, b - 1); + *(b - char_set[5] - 2) = range_start; + *(b - char_set[5] - 1) = range_end; + char_set[4]++; /* ranges_index */ + } + /* Have to increment the pointer into the pattern string, so the + caller isn't still at the ending character. */ + (*p_ptr)++; + + return ret; +} +#else /* BYTE */ +/* Read the ending character of a range (in a bracket expression) from the + uncompiled pattern *P_PTR (which ends at PEND). We assume the + starting character is in `P[-2]'. (`P[-1]' is the character `-'.) + Then we set the translation of all bits between the starting and + ending characters (inclusive) in the compiled pattern B. + + Return an error code. + + We use these short variable names so we can use the same macros as + `regex_compile' itself. */ + +static reg_errcode_t +byte_compile_range (range_start_char, p_ptr, pend, translate, syntax, b) + unsigned int range_start_char; + const char **p_ptr, *pend; + RE_TRANSLATE_TYPE translate; + reg_syntax_t syntax; + unsigned char *b; +{ + unsigned this_char; + const char *p = *p_ptr; + reg_errcode_t ret; +# if _LIBC + const unsigned char *collseq; + unsigned int start_colseq; + unsigned int end_colseq; +# else + unsigned end_char; +# endif + + if (p == pend) + return REG_ERANGE; + + /* Have to increment the pointer into the pattern string, so the + caller isn't still at the ending character. */ + (*p_ptr)++; + + /* Report an error if the range is empty and the syntax prohibits this. */ + ret = syntax & RE_NO_EMPTY_RANGES ? REG_ERANGE : REG_NOERROR; + +# if _LIBC + collseq = (const unsigned char *) _NL_CURRENT (LC_COLLATE, + _NL_COLLATE_COLLSEQMB); + + start_colseq = collseq[(unsigned char) TRANSLATE (range_start_char)]; + end_colseq = collseq[(unsigned char) TRANSLATE (p[0])]; + for (this_char = 0; this_char <= (unsigned char) -1; ++this_char) + { + unsigned int this_colseq = collseq[(unsigned char) TRANSLATE (this_char)]; + + if (start_colseq <= this_colseq && this_colseq <= end_colseq) + { + SET_LIST_BIT (TRANSLATE (this_char)); + ret = REG_NOERROR; + } + } +# else + /* Here we see why `this_char' has to be larger than an `unsigned + char' -- we would otherwise go into an infinite loop, since all + characters <= 0xff. */ + range_start_char = TRANSLATE (range_start_char); + /* TRANSLATE(p[0]) is casted to char (not unsigned char) in TRANSLATE, + and some compilers cast it to int implicitly, so following for_loop + may fall to (almost) infinite loop. + e.g. If translate[p[0]] = 0xff, end_char may equals to 0xffffffff. + To avoid this, we cast p[0] to unsigned int and truncate it. */ + end_char = ((unsigned)TRANSLATE(p[0]) & ((1 << BYTEWIDTH) - 1)); + + for (this_char = range_start_char; this_char <= end_char; ++this_char) + { + SET_LIST_BIT (TRANSLATE (this_char)); + ret = REG_NOERROR; + } +# endif + + return ret; +} +#endif /* WCHAR */ + +/* re_compile_fastmap computes a ``fastmap'' for the compiled pattern in + BUFP. A fastmap records which of the (1 << BYTEWIDTH) possible + characters can start a string that matches the pattern. This fastmap + is used by re_search to skip quickly over impossible starting points. + + The caller must supply the address of a (1 << BYTEWIDTH)-byte data + area as BUFP->fastmap. + + We set the `fastmap', `fastmap_accurate', and `can_be_null' fields in + the pattern buffer. + + Returns 0 if we succeed, -2 if an internal error. */ + +#ifdef WCHAR +/* local function for re_compile_fastmap. + truncate wchar_t character to char. */ +static unsigned char truncate_wchar (CHAR_T c); + +static unsigned char +truncate_wchar (c) + CHAR_T c; +{ + unsigned char buf[MB_CUR_MAX]; + mbstate_t state; + int retval; + memset (&state, '\0', sizeof (state)); +# ifdef _LIBC + retval = __wcrtomb (buf, c, &state); +# else + retval = wcrtomb (buf, c, &state); +# endif + return retval > 0 ? buf[0] : (unsigned char) c; +} +#endif /* WCHAR */ + +static int +PREFIX(re_compile_fastmap) (bufp) + struct re_pattern_buffer *bufp; +{ + int j, k; +#ifdef MATCH_MAY_ALLOCATE + PREFIX(fail_stack_type) fail_stack; +#endif +#ifndef REGEX_MALLOC + char *destination; +#endif + + register char *fastmap = bufp->fastmap; + +#ifdef WCHAR + /* We need to cast pattern to (wchar_t*), because we casted this compiled + pattern to (char*) in regex_compile. */ + UCHAR_T *pattern = (UCHAR_T*)bufp->buffer; + register UCHAR_T *pend = (UCHAR_T*) (bufp->buffer + bufp->used); +#else /* BYTE */ + UCHAR_T *pattern = bufp->buffer; + register UCHAR_T *pend = pattern + bufp->used; +#endif /* WCHAR */ + UCHAR_T *p = pattern; + +#ifdef REL_ALLOC + /* This holds the pointer to the failure stack, when + it is allocated relocatably. */ + fail_stack_elt_t *failure_stack_ptr; +#endif + + /* Assume that each path through the pattern can be null until + proven otherwise. We set this false at the bottom of switch + statement, to which we get only if a particular path doesn't + match the empty string. */ + boolean path_can_be_null = true; + + /* We aren't doing a `succeed_n' to begin with. */ + boolean succeed_n_p = false; + + assert (fastmap != NULL && p != NULL); + + INIT_FAIL_STACK (); + bzero (fastmap, 1 << BYTEWIDTH); /* Assume nothing's valid. */ + bufp->fastmap_accurate = 1; /* It will be when we're done. */ + bufp->can_be_null = 0; + + while (1) + { + if (p == pend || *p == succeed) + { + /* We have reached the (effective) end of pattern. */ + if (!FAIL_STACK_EMPTY ()) + { + bufp->can_be_null |= path_can_be_null; + + /* Reset for next path. */ + path_can_be_null = true; + + p = fail_stack.stack[--fail_stack.avail].pointer; + + continue; + } + else + break; + } + + /* We should never be about to go beyond the end of the pattern. */ + assert (p < pend); + + switch (SWITCH_ENUM_CAST ((re_opcode_t) *p++)) + { + + /* I guess the idea here is to simply not bother with a fastmap + if a backreference is used, since it's too hard to figure out + the fastmap for the corresponding group. Setting + `can_be_null' stops `re_search_2' from using the fastmap, so + that is all we do. */ + case duplicate: + bufp->can_be_null = 1; + goto done; + + + /* Following are the cases which match a character. These end + with `break'. */ + +#ifdef WCHAR + case exactn: + fastmap[truncate_wchar(p[1])] = 1; + break; +#else /* BYTE */ + case exactn: + fastmap[p[1]] = 1; + break; +#endif /* WCHAR */ +#ifdef MBS_SUPPORT + case exactn_bin: + fastmap[p[1]] = 1; + break; +#endif + +#ifdef WCHAR + /* It is hard to distinguish fastmap from (multi byte) characters + which depends on current locale. */ + case charset: + case charset_not: + case wordchar: + case notwordchar: + bufp->can_be_null = 1; + goto done; +#else /* BYTE */ + case charset: + for (j = *p++ * BYTEWIDTH - 1; j >= 0; j--) + if (p[j / BYTEWIDTH] & (1 << (j % BYTEWIDTH))) + fastmap[j] = 1; + break; + + + case charset_not: + /* Chars beyond end of map must be allowed. */ + for (j = *p * BYTEWIDTH; j < (1 << BYTEWIDTH); j++) + fastmap[j] = 1; + + for (j = *p++ * BYTEWIDTH - 1; j >= 0; j--) + if (!(p[j / BYTEWIDTH] & (1 << (j % BYTEWIDTH)))) + fastmap[j] = 1; + break; + + + case wordchar: + for (j = 0; j < (1 << BYTEWIDTH); j++) + if (SYNTAX (j) == Sword) + fastmap[j] = 1; + break; + + + case notwordchar: + for (j = 0; j < (1 << BYTEWIDTH); j++) + if (SYNTAX (j) != Sword) + fastmap[j] = 1; + break; +#endif /* WCHAR */ + + case anychar: + { + int fastmap_newline = fastmap['\n']; + + /* `.' matches anything ... */ + for (j = 0; j < (1 << BYTEWIDTH); j++) + fastmap[j] = 1; + + /* ... except perhaps newline. */ + if (!(bufp->syntax & RE_DOT_NEWLINE)) + fastmap['\n'] = fastmap_newline; + + /* Return if we have already set `can_be_null'; if we have, + then the fastmap is irrelevant. Something's wrong here. */ + else if (bufp->can_be_null) + goto done; + + /* Otherwise, have to check alternative paths. */ + break; + } + +#ifdef emacs + case syntaxspec: + k = *p++; + for (j = 0; j < (1 << BYTEWIDTH); j++) + if (SYNTAX (j) == (enum syntaxcode) k) + fastmap[j] = 1; + break; + + + case notsyntaxspec: + k = *p++; + for (j = 0; j < (1 << BYTEWIDTH); j++) + if (SYNTAX (j) != (enum syntaxcode) k) + fastmap[j] = 1; + break; + + + /* All cases after this match the empty string. These end with + `continue'. */ + + + case before_dot: + case at_dot: + case after_dot: + continue; +#endif /* emacs */ + + + case no_op: + case begline: + case endline: + case begbuf: + case endbuf: + case wordbound: + case notwordbound: + case wordbeg: + case wordend: + case push_dummy_failure: + continue; + + + case jump_n: + case pop_failure_jump: + case maybe_pop_jump: + case jump: + case jump_past_alt: + case dummy_failure_jump: + EXTRACT_NUMBER_AND_INCR (j, p); + p += j; + if (j > 0) + continue; + + /* Jump backward implies we just went through the body of a + loop and matched nothing. Opcode jumped to should be + `on_failure_jump' or `succeed_n'. Just treat it like an + ordinary jump. For a * loop, it has pushed its failure + point already; if so, discard that as redundant. */ + if ((re_opcode_t) *p != on_failure_jump + && (re_opcode_t) *p != succeed_n) + continue; + + p++; + EXTRACT_NUMBER_AND_INCR (j, p); + p += j; + + /* If what's on the stack is where we are now, pop it. */ + if (!FAIL_STACK_EMPTY () + && fail_stack.stack[fail_stack.avail - 1].pointer == p) + fail_stack.avail--; + + continue; + + + case on_failure_jump: + case on_failure_keep_string_jump: + handle_on_failure_jump: + EXTRACT_NUMBER_AND_INCR (j, p); + + /* For some patterns, e.g., `(a?)?', `p+j' here points to the + end of the pattern. We don't want to push such a point, + since when we restore it above, entering the switch will + increment `p' past the end of the pattern. We don't need + to push such a point since we obviously won't find any more + fastmap entries beyond `pend'. Such a pattern can match + the null string, though. */ + if (p + j < pend) + { + if (!PUSH_PATTERN_OP (p + j, fail_stack)) + { + RESET_FAIL_STACK (); + return -2; + } + } + else + bufp->can_be_null = 1; + + if (succeed_n_p) + { + EXTRACT_NUMBER_AND_INCR (k, p); /* Skip the n. */ + succeed_n_p = false; + } + + continue; + + + case succeed_n: + /* Get to the number of times to succeed. */ + p += OFFSET_ADDRESS_SIZE; + + /* Increment p past the n for when k != 0. */ + EXTRACT_NUMBER_AND_INCR (k, p); + if (k == 0) + { + p -= 2 * OFFSET_ADDRESS_SIZE; + succeed_n_p = true; /* Spaghetti code alert. */ + goto handle_on_failure_jump; + } + continue; + + + case set_number_at: + p += 2 * OFFSET_ADDRESS_SIZE; + continue; + + + case start_memory: + case stop_memory: + p += 2; + continue; + + + default: + abort (); /* We have listed all the cases. */ + } /* switch *p++ */ + + /* Getting here means we have found the possible starting + characters for one path of the pattern -- and that the empty + string does not match. We need not follow this path further. + Instead, look at the next alternative (remembered on the + stack), or quit if no more. The test at the top of the loop + does these things. */ + path_can_be_null = false; + p = pend; + } /* while p */ + + /* Set `can_be_null' for the last path (also the first path, if the + pattern is empty). */ + bufp->can_be_null |= path_can_be_null; + + done: + RESET_FAIL_STACK (); + return 0; +} + +#else /* not INSIDE_RECURSION */ + +int +re_compile_fastmap (bufp) + struct re_pattern_buffer *bufp; +{ +# ifdef MBS_SUPPORT + if (MB_CUR_MAX != 1) + return wcs_re_compile_fastmap(bufp); + else +# endif + return byte_re_compile_fastmap(bufp); +} /* re_compile_fastmap */ +#ifdef _LIBC +weak_alias (__re_compile_fastmap, re_compile_fastmap) +#endif + + +/* Set REGS to hold NUM_REGS registers, storing them in STARTS and + ENDS. Subsequent matches using PATTERN_BUFFER and REGS will use + this memory for recording register information. STARTS and ENDS + must be allocated using the malloc library routine, and must each + be at least NUM_REGS * sizeof (regoff_t) bytes long. + + If NUM_REGS == 0, then subsequent matches should allocate their own + register data. + + Unless this function is called, the first search or match using + PATTERN_BUFFER will allocate its own register data, without + freeing the old data. */ + +void +re_set_registers (bufp, regs, num_regs, starts, ends) + struct re_pattern_buffer *bufp; + struct re_registers *regs; + unsigned num_regs; + regoff_t *starts, *ends; +{ + if (num_regs) + { + bufp->regs_allocated = REGS_REALLOCATE; + regs->num_regs = num_regs; + regs->start = starts; + regs->end = ends; + } + else + { + bufp->regs_allocated = REGS_UNALLOCATED; + regs->num_regs = 0; + regs->start = regs->end = (regoff_t *) 0; + } +} +#ifdef _LIBC +weak_alias (__re_set_registers, re_set_registers) +#endif + +/* Searching routines. */ + +/* Like re_search_2, below, but only one string is specified, and + doesn't let you say where to stop matching. */ + +int +re_search (bufp, string, size, startpos, range, regs) + struct re_pattern_buffer *bufp; + const char *string; + int size, startpos, range; + struct re_registers *regs; +{ + return re_search_2 (bufp, NULL, 0, string, size, startpos, range, + regs, size); +} +#ifdef _LIBC +weak_alias (__re_search, re_search) +#endif + + +/* Using the compiled pattern in BUFP->buffer, first tries to match the + virtual concatenation of STRING1 and STRING2, starting first at index + STARTPOS, then at STARTPOS + 1, and so on. + + STRING1 and STRING2 have length SIZE1 and SIZE2, respectively. + + RANGE is how far to scan while trying to match. RANGE = 0 means try + only at STARTPOS; in general, the last start tried is STARTPOS + + RANGE. + + In REGS, return the indices of the virtual concatenation of STRING1 + and STRING2 that matched the entire BUFP->buffer and its contained + subexpressions. + + Do not consider matching one past the index STOP in the virtual + concatenation of STRING1 and STRING2. + + We return either the position in the strings at which the match was + found, -1 if no match, or -2 if error (such as failure + stack overflow). */ + +int +re_search_2 (bufp, string1, size1, string2, size2, startpos, range, regs, stop) + struct re_pattern_buffer *bufp; + const char *string1, *string2; + int size1, size2; + int startpos; + int range; + struct re_registers *regs; + int stop; +{ +# ifdef MBS_SUPPORT + if (MB_CUR_MAX != 1) + return wcs_re_search_2 (bufp, string1, size1, string2, size2, startpos, + range, regs, stop); + else +# endif + return byte_re_search_2 (bufp, string1, size1, string2, size2, startpos, + range, regs, stop); +} /* re_search_2 */ +#ifdef _LIBC +weak_alias (__re_search_2, re_search_2) +#endif + +#endif /* not INSIDE_RECURSION */ + +#ifdef INSIDE_RECURSION + +#ifdef MATCH_MAY_ALLOCATE +# define FREE_VAR(var) if (var) REGEX_FREE (var); var = NULL +#else +# define FREE_VAR(var) if (var) free (var); var = NULL +#endif + +#ifdef WCHAR +# define MAX_ALLOCA_SIZE 2000 + +# define FREE_WCS_BUFFERS() \ + do { \ + if (size1 > MAX_ALLOCA_SIZE) \ + { \ + free (wcs_string1); \ + free (mbs_offset1); \ + } \ + else \ + { \ + FREE_VAR (wcs_string1); \ + FREE_VAR (mbs_offset1); \ + } \ + if (size2 > MAX_ALLOCA_SIZE) \ + { \ + free (wcs_string2); \ + free (mbs_offset2); \ + } \ + else \ + { \ + FREE_VAR (wcs_string2); \ + FREE_VAR (mbs_offset2); \ + } \ + } while (0) + +#endif + + +static int +PREFIX(re_search_2) (bufp, string1, size1, string2, size2, startpos, range, + regs, stop) + struct re_pattern_buffer *bufp; + const char *string1, *string2; + int size1, size2; + int startpos; + int range; + struct re_registers *regs; + int stop; +{ + int val; + register char *fastmap = bufp->fastmap; + register RE_TRANSLATE_TYPE translate = bufp->translate; + int total_size = size1 + size2; + int endpos = startpos + range; +#ifdef WCHAR + /* We need wchar_t* buffers correspond to cstring1, cstring2. */ + wchar_t *wcs_string1 = NULL, *wcs_string2 = NULL; + /* We need the size of wchar_t buffers correspond to csize1, csize2. */ + int wcs_size1 = 0, wcs_size2 = 0; + /* offset buffer for optimizatoin. See convert_mbs_to_wc. */ + int *mbs_offset1 = NULL, *mbs_offset2 = NULL; + /* They hold whether each wchar_t is binary data or not. */ + char *is_binary = NULL; +#endif /* WCHAR */ + + /* Check for out-of-range STARTPOS. */ + if (startpos < 0 || startpos > total_size) + return -1; + + /* Fix up RANGE if it might eventually take us outside + the virtual concatenation of STRING1 and STRING2. + Make sure we won't move STARTPOS below 0 or above TOTAL_SIZE. */ + if (endpos < 0) + range = 0 - startpos; + else if (endpos > total_size) + range = total_size - startpos; + + /* If the search isn't to be a backwards one, don't waste time in a + search for a pattern that must be anchored. */ + if (bufp->used > 0 && range > 0 + && ((re_opcode_t) bufp->buffer[0] == begbuf + /* `begline' is like `begbuf' if it cannot match at newlines. */ + || ((re_opcode_t) bufp->buffer[0] == begline + && !bufp->newline_anchor))) + { + if (startpos > 0) + return -1; + else + range = 1; + } + +#ifdef emacs + /* In a forward search for something that starts with \=. + don't keep searching past point. */ + if (bufp->used > 0 && (re_opcode_t) bufp->buffer[0] == at_dot && range > 0) + { + range = PT - startpos; + if (range <= 0) + return -1; + } +#endif /* emacs */ + + /* Update the fastmap now if not correct already. */ + if (fastmap && !bufp->fastmap_accurate) + if (re_compile_fastmap (bufp) == -2) + return -2; + +#ifdef WCHAR + /* Allocate wchar_t array for wcs_string1 and wcs_string2 and + fill them with converted string. */ + if (size1 != 0) + { + if (size1 > MAX_ALLOCA_SIZE) + { + wcs_string1 = TALLOC (size1 + 1, CHAR_T); + mbs_offset1 = TALLOC (size1 + 1, int); + is_binary = TALLOC (size1 + 1, char); + } + else + { + wcs_string1 = REGEX_TALLOC (size1 + 1, CHAR_T); + mbs_offset1 = REGEX_TALLOC (size1 + 1, int); + is_binary = REGEX_TALLOC (size1 + 1, char); + } + if (!wcs_string1 || !mbs_offset1 || !is_binary) + { + if (size1 > MAX_ALLOCA_SIZE) + { + free (wcs_string1); + free (mbs_offset1); + free (is_binary); + } + else + { + FREE_VAR (wcs_string1); + FREE_VAR (mbs_offset1); + FREE_VAR (is_binary); + } + return -2; + } + wcs_size1 = convert_mbs_to_wcs(wcs_string1, string1, size1, + mbs_offset1, is_binary); + wcs_string1[wcs_size1] = L'\0'; /* for a sentinel */ + if (size1 > MAX_ALLOCA_SIZE) + free (is_binary); + else + FREE_VAR (is_binary); + } + if (size2 != 0) + { + if (size2 > MAX_ALLOCA_SIZE) + { + wcs_string2 = TALLOC (size2 + 1, CHAR_T); + mbs_offset2 = TALLOC (size2 + 1, int); + is_binary = TALLOC (size2 + 1, char); + } + else + { + wcs_string2 = REGEX_TALLOC (size2 + 1, CHAR_T); + mbs_offset2 = REGEX_TALLOC (size2 + 1, int); + is_binary = REGEX_TALLOC (size2 + 1, char); + } + if (!wcs_string2 || !mbs_offset2 || !is_binary) + { + FREE_WCS_BUFFERS (); + if (size2 > MAX_ALLOCA_SIZE) + free (is_binary); + else + FREE_VAR (is_binary); + return -2; + } + wcs_size2 = convert_mbs_to_wcs(wcs_string2, string2, size2, + mbs_offset2, is_binary); + wcs_string2[wcs_size2] = L'\0'; /* for a sentinel */ + if (size2 > MAX_ALLOCA_SIZE) + free (is_binary); + else + FREE_VAR (is_binary); + } +#endif /* WCHAR */ + + + /* Loop through the string, looking for a place to start matching. */ + for (;;) + { + /* If a fastmap is supplied, skip quickly over characters that + cannot be the start of a match. If the pattern can match the + null string, however, we don't need to skip characters; we want + the first null string. */ + if (fastmap && startpos < total_size && !bufp->can_be_null) + { + if (range > 0) /* Searching forwards. */ + { + register const char *d; + register int lim = 0; + int irange = range; + + if (startpos < size1 && startpos + range >= size1) + lim = range - (size1 - startpos); + + d = (startpos >= size1 ? string2 - size1 : string1) + startpos; + + /* Written out as an if-else to avoid testing `translate' + inside the loop. */ + if (translate) + while (range > lim + && !fastmap[(unsigned char) + translate[(unsigned char) *d++]]) + range--; + else + while (range > lim && !fastmap[(unsigned char) *d++]) + range--; + + startpos += irange - range; + } + else /* Searching backwards. */ + { + register CHAR_T c = (size1 == 0 || startpos >= size1 + ? string2[startpos - size1] + : string1[startpos]); + + if (!fastmap[(unsigned char) TRANSLATE (c)]) + goto advance; + } + } + + /* If can't match the null string, and that's all we have left, fail. */ + if (range >= 0 && startpos == total_size && fastmap + && !bufp->can_be_null) + { +#ifdef WCHAR + FREE_WCS_BUFFERS (); +#endif + return -1; + } + +#ifdef WCHAR + val = wcs_re_match_2_internal (bufp, string1, size1, string2, + size2, startpos, regs, stop, + wcs_string1, wcs_size1, + wcs_string2, wcs_size2, + mbs_offset1, mbs_offset2); +#else /* BYTE */ + val = byte_re_match_2_internal (bufp, string1, size1, string2, + size2, startpos, regs, stop); +#endif /* BYTE */ + +#ifndef REGEX_MALLOC +# ifdef C_ALLOCA + alloca (0); +# endif +#endif + + if (val >= 0) + { +#ifdef WCHAR + FREE_WCS_BUFFERS (); +#endif + return startpos; + } + + if (val == -2) + { +#ifdef WCHAR + FREE_WCS_BUFFERS (); +#endif + return -2; + } + + advance: + if (!range) + break; + else if (range > 0) + { + range--; + startpos++; + } + else + { + range++; + startpos--; + } + } +#ifdef WCHAR + FREE_WCS_BUFFERS (); +#endif + return -1; +} + +#ifdef WCHAR +/* This converts PTR, a pointer into one of the search wchar_t strings + `string1' and `string2' into an multibyte string offset from the + beginning of that string. We use mbs_offset to optimize. + See convert_mbs_to_wcs. */ +# define POINTER_TO_OFFSET(ptr) \ + (FIRST_STRING_P (ptr) \ + ? ((regoff_t)(mbs_offset1 != NULL? mbs_offset1[(ptr)-string1] : 0)) \ + : ((regoff_t)((mbs_offset2 != NULL? mbs_offset2[(ptr)-string2] : 0) \ + + csize1))) +#else /* BYTE */ +/* This converts PTR, a pointer into one of the search strings `string1' + and `string2' into an offset from the beginning of that string. */ +# define POINTER_TO_OFFSET(ptr) \ + (FIRST_STRING_P (ptr) \ + ? ((regoff_t) ((ptr) - string1)) \ + : ((regoff_t) ((ptr) - string2 + size1))) +#endif /* WCHAR */ + +/* Macros for dealing with the split strings in re_match_2. */ + +#define MATCHING_IN_FIRST_STRING (dend == end_match_1) + +/* Call before fetching a character with *d. This switches over to + string2 if necessary. */ +#define PREFETCH() \ + while (d == dend) \ + { \ + /* End of string2 => fail. */ \ + if (dend == end_match_2) \ + goto fail; \ + /* End of string1 => advance to string2. */ \ + d = string2; \ + dend = end_match_2; \ + } + +/* Test if at very beginning or at very end of the virtual concatenation + of `string1' and `string2'. If only one string, it's `string2'. */ +#define AT_STRINGS_BEG(d) ((d) == (size1 ? string1 : string2) || !size2) +#define AT_STRINGS_END(d) ((d) == end2) + + +/* Test if D points to a character which is word-constituent. We have + two special cases to check for: if past the end of string1, look at + the first character in string2; and if before the beginning of + string2, look at the last character in string1. */ +#ifdef WCHAR +/* Use internationalized API instead of SYNTAX. */ +# define WORDCHAR_P(d) \ + (iswalnum ((wint_t)((d) == end1 ? *string2 \ + : (d) == string2 - 1 ? *(end1 - 1) : *(d))) != 0 \ + || ((d) == end1 ? *string2 \ + : (d) == string2 - 1 ? *(end1 - 1) : *(d)) == L'_') +#else /* BYTE */ +# define WORDCHAR_P(d) \ + (SYNTAX ((d) == end1 ? *string2 \ + : (d) == string2 - 1 ? *(end1 - 1) : *(d)) \ + == Sword) +#endif /* WCHAR */ + +/* Disabled due to a compiler bug -- see comment at case wordbound */ +#if 0 +/* Test if the character before D and the one at D differ with respect + to being word-constituent. */ +#define AT_WORD_BOUNDARY(d) \ + (AT_STRINGS_BEG (d) || AT_STRINGS_END (d) \ + || WORDCHAR_P (d - 1) != WORDCHAR_P (d)) +#endif + +/* Free everything we malloc. */ +#ifdef MATCH_MAY_ALLOCATE +# ifdef WCHAR +# define FREE_VARIABLES() \ + do { \ + REGEX_FREE_STACK (fail_stack.stack); \ + FREE_VAR (regstart); \ + FREE_VAR (regend); \ + FREE_VAR (old_regstart); \ + FREE_VAR (old_regend); \ + FREE_VAR (best_regstart); \ + FREE_VAR (best_regend); \ + FREE_VAR (reg_info); \ + FREE_VAR (reg_dummy); \ + FREE_VAR (reg_info_dummy); \ + if (!cant_free_wcs_buf) \ + { \ + FREE_VAR (string1); \ + FREE_VAR (string2); \ + FREE_VAR (mbs_offset1); \ + FREE_VAR (mbs_offset2); \ + } \ + } while (0) +# else /* BYTE */ +# define FREE_VARIABLES() \ + do { \ + REGEX_FREE_STACK (fail_stack.stack); \ + FREE_VAR (regstart); \ + FREE_VAR (regend); \ + FREE_VAR (old_regstart); \ + FREE_VAR (old_regend); \ + FREE_VAR (best_regstart); \ + FREE_VAR (best_regend); \ + FREE_VAR (reg_info); \ + FREE_VAR (reg_dummy); \ + FREE_VAR (reg_info_dummy); \ + } while (0) +# endif /* WCHAR */ +#else +# ifdef WCHAR +# define FREE_VARIABLES() \ + do { \ + if (!cant_free_wcs_buf) \ + { \ + FREE_VAR (string1); \ + FREE_VAR (string2); \ + FREE_VAR (mbs_offset1); \ + FREE_VAR (mbs_offset2); \ + } \ + } while (0) +# else /* BYTE */ +# define FREE_VARIABLES() ((void)0) /* Do nothing! But inhibit gcc warning. */ +# endif /* WCHAR */ +#endif /* not MATCH_MAY_ALLOCATE */ + +/* These values must meet several constraints. They must not be valid + register values; since we have a limit of 255 registers (because + we use only one byte in the pattern for the register number), we can + use numbers larger than 255. They must differ by 1, because of + NUM_FAILURE_ITEMS above. And the value for the lowest register must + be larger than the value for the highest register, so we do not try + to actually save any registers when none are active. */ +#define NO_HIGHEST_ACTIVE_REG (1 << BYTEWIDTH) +#define NO_LOWEST_ACTIVE_REG (NO_HIGHEST_ACTIVE_REG + 1) + +#else /* not INSIDE_RECURSION */ +/* Matching routines. */ + +#ifndef emacs /* Emacs never uses this. */ +/* re_match is like re_match_2 except it takes only a single string. */ + +int +re_match (bufp, string, size, pos, regs) + struct re_pattern_buffer *bufp; + const char *string; + int size, pos; + struct re_registers *regs; +{ + int result; +# ifdef MBS_SUPPORT + if (MB_CUR_MAX != 1) + result = wcs_re_match_2_internal (bufp, NULL, 0, string, size, + pos, regs, size, + NULL, 0, NULL, 0, NULL, NULL); + else +# endif + result = byte_re_match_2_internal (bufp, NULL, 0, string, size, + pos, regs, size); +# ifndef REGEX_MALLOC +# ifdef C_ALLOCA + alloca (0); +# endif +# endif + return result; +} +# ifdef _LIBC +weak_alias (__re_match, re_match) +# endif +#endif /* not emacs */ + +#endif /* not INSIDE_RECURSION */ + +#ifdef INSIDE_RECURSION +static boolean PREFIX(group_match_null_string_p) _RE_ARGS ((UCHAR_T **p, + UCHAR_T *end, + PREFIX(register_info_type) *reg_info)); +static boolean PREFIX(alt_match_null_string_p) _RE_ARGS ((UCHAR_T *p, + UCHAR_T *end, + PREFIX(register_info_type) *reg_info)); +static boolean PREFIX(common_op_match_null_string_p) _RE_ARGS ((UCHAR_T **p, + UCHAR_T *end, + PREFIX(register_info_type) *reg_info)); +static int PREFIX(bcmp_translate) _RE_ARGS ((const CHAR_T *s1, const CHAR_T *s2, + int len, char *translate)); +#else /* not INSIDE_RECURSION */ + +/* re_match_2 matches the compiled pattern in BUFP against the + the (virtual) concatenation of STRING1 and STRING2 (of length SIZE1 + and SIZE2, respectively). We start matching at POS, and stop + matching at STOP. + + If REGS is non-null and the `no_sub' field of BUFP is nonzero, we + store offsets for the substring each group matched in REGS. See the + documentation for exactly how many groups we fill. + + We return -1 if no match, -2 if an internal error (such as the + failure stack overflowing). Otherwise, we return the length of the + matched substring. */ + +int +re_match_2 (bufp, string1, size1, string2, size2, pos, regs, stop) + struct re_pattern_buffer *bufp; + const char *string1, *string2; + int size1, size2; + int pos; + struct re_registers *regs; + int stop; +{ + int result; +# ifdef MBS_SUPPORT + if (MB_CUR_MAX != 1) + result = wcs_re_match_2_internal (bufp, string1, size1, string2, size2, + pos, regs, stop, + NULL, 0, NULL, 0, NULL, NULL); + else +# endif + result = byte_re_match_2_internal (bufp, string1, size1, string2, size2, + pos, regs, stop); + +#ifndef REGEX_MALLOC +# ifdef C_ALLOCA + alloca (0); +# endif +#endif + return result; +} +#ifdef _LIBC +weak_alias (__re_match_2, re_match_2) +#endif + +#endif /* not INSIDE_RECURSION */ + +#ifdef INSIDE_RECURSION + +#ifdef WCHAR +static int count_mbs_length PARAMS ((int *, int)); + +/* This check the substring (from 0, to length) of the multibyte string, + to which offset_buffer correspond. And count how many wchar_t_characters + the substring occupy. We use offset_buffer to optimization. + See convert_mbs_to_wcs. */ + +static int +count_mbs_length(offset_buffer, length) + int *offset_buffer; + int length; +{ + int upper, lower; + + /* Check whether the size is valid. */ + if (length < 0) + return -1; + + if (offset_buffer == NULL) + return 0; + + /* If there are no multibyte character, offset_buffer[i] == i. + Optmize for this case. */ + if (offset_buffer[length] == length) + return length; + + /* Set up upper with length. (because for all i, offset_buffer[i] >= i) */ + upper = length; + lower = 0; + + while (true) + { + int middle = (lower + upper) / 2; + if (middle == lower || middle == upper) + break; + if (offset_buffer[middle] > length) + upper = middle; + else if (offset_buffer[middle] < length) + lower = middle; + else + return middle; + } + + return -1; +} +#endif /* WCHAR */ + +/* This is a separate function so that we can force an alloca cleanup + afterwards. */ +#ifdef WCHAR +static int +wcs_re_match_2_internal (bufp, cstring1, csize1, cstring2, csize2, pos, + regs, stop, string1, size1, string2, size2, + mbs_offset1, mbs_offset2) + struct re_pattern_buffer *bufp; + const char *cstring1, *cstring2; + int csize1, csize2; + int pos; + struct re_registers *regs; + int stop; + /* string1 == string2 == NULL means string1/2, size1/2 and + mbs_offset1/2 need seting up in this function. */ + /* We need wchar_t* buffers correspond to cstring1, cstring2. */ + wchar_t *string1, *string2; + /* We need the size of wchar_t buffers correspond to csize1, csize2. */ + int size1, size2; + /* offset buffer for optimizatoin. See convert_mbs_to_wc. */ + int *mbs_offset1, *mbs_offset2; +#else /* BYTE */ +static int +byte_re_match_2_internal (bufp, string1, size1,string2, size2, pos, + regs, stop) + struct re_pattern_buffer *bufp; + const char *string1, *string2; + int size1, size2; + int pos; + struct re_registers *regs; + int stop; +#endif /* BYTE */ +{ + /* General temporaries. */ + int mcnt; + UCHAR_T *p1; +#ifdef WCHAR + /* They hold whether each wchar_t is binary data or not. */ + char *is_binary = NULL; + /* If true, we can't free string1/2, mbs_offset1/2. */ + int cant_free_wcs_buf = 1; +#endif /* WCHAR */ + + /* Just past the end of the corresponding string. */ + const CHAR_T *end1, *end2; + + /* Pointers into string1 and string2, just past the last characters in + each to consider matching. */ + const CHAR_T *end_match_1, *end_match_2; + + /* Where we are in the data, and the end of the current string. */ + const CHAR_T *d, *dend; + + /* Where we are in the pattern, and the end of the pattern. */ +#ifdef WCHAR + UCHAR_T *pattern, *p; + register UCHAR_T *pend; +#else /* BYTE */ + UCHAR_T *p = bufp->buffer; + register UCHAR_T *pend = p + bufp->used; +#endif /* WCHAR */ + + /* Mark the opcode just after a start_memory, so we can test for an + empty subpattern when we get to the stop_memory. */ + UCHAR_T *just_past_start_mem = 0; + + /* We use this to map every character in the string. */ + RE_TRANSLATE_TYPE translate = bufp->translate; + + /* Failure point stack. Each place that can handle a failure further + down the line pushes a failure point on this stack. It consists of + restart, regend, and reg_info for all registers corresponding to + the subexpressions we're currently inside, plus the number of such + registers, and, finally, two char *'s. The first char * is where + to resume scanning the pattern; the second one is where to resume + scanning the strings. If the latter is zero, the failure point is + a ``dummy''; if a failure happens and the failure point is a dummy, + it gets discarded and the next next one is tried. */ +#ifdef MATCH_MAY_ALLOCATE /* otherwise, this is global. */ + PREFIX(fail_stack_type) fail_stack; +#endif +#ifdef DEBUG + static unsigned failure_id; + unsigned nfailure_points_pushed = 0, nfailure_points_popped = 0; +#endif + +#ifdef REL_ALLOC + /* This holds the pointer to the failure stack, when + it is allocated relocatably. */ + fail_stack_elt_t *failure_stack_ptr; +#endif + + /* We fill all the registers internally, independent of what we + return, for use in backreferences. The number here includes + an element for register zero. */ + size_t num_regs = bufp->re_nsub + 1; + + /* The currently active registers. */ + active_reg_t lowest_active_reg = NO_LOWEST_ACTIVE_REG; + active_reg_t highest_active_reg = NO_HIGHEST_ACTIVE_REG; + + /* Information on the contents of registers. These are pointers into + the input strings; they record just what was matched (on this + attempt) by a subexpression part of the pattern, that is, the + regnum-th regstart pointer points to where in the pattern we began + matching and the regnum-th regend points to right after where we + stopped matching the regnum-th subexpression. (The zeroth register + keeps track of what the whole pattern matches.) */ +#ifdef MATCH_MAY_ALLOCATE /* otherwise, these are global. */ + const CHAR_T **regstart, **regend; +#endif + + /* If a group that's operated upon by a repetition operator fails to + match anything, then the register for its start will need to be + restored because it will have been set to wherever in the string we + are when we last see its open-group operator. Similarly for a + register's end. */ +#ifdef MATCH_MAY_ALLOCATE /* otherwise, these are global. */ + const CHAR_T **old_regstart, **old_regend; +#endif + + /* The is_active field of reg_info helps us keep track of which (possibly + nested) subexpressions we are currently in. The matched_something + field of reg_info[reg_num] helps us tell whether or not we have + matched any of the pattern so far this time through the reg_num-th + subexpression. These two fields get reset each time through any + loop their register is in. */ +#ifdef MATCH_MAY_ALLOCATE /* otherwise, this is global. */ + PREFIX(register_info_type) *reg_info; +#endif + + /* The following record the register info as found in the above + variables when we find a match better than any we've seen before. + This happens as we backtrack through the failure points, which in + turn happens only if we have not yet matched the entire string. */ + unsigned best_regs_set = false; +#ifdef MATCH_MAY_ALLOCATE /* otherwise, these are global. */ + const CHAR_T **best_regstart, **best_regend; +#endif + + /* Logically, this is `best_regend[0]'. But we don't want to have to + allocate space for that if we're not allocating space for anything + else (see below). Also, we never need info about register 0 for + any of the other register vectors, and it seems rather a kludge to + treat `best_regend' differently than the rest. So we keep track of + the end of the best match so far in a separate variable. We + initialize this to NULL so that when we backtrack the first time + and need to test it, it's not garbage. */ + const CHAR_T *match_end = NULL; + + /* This helps SET_REGS_MATCHED avoid doing redundant work. */ + int set_regs_matched_done = 0; + + /* Used when we pop values we don't care about. */ +#ifdef MATCH_MAY_ALLOCATE /* otherwise, these are global. */ + const CHAR_T **reg_dummy; + PREFIX(register_info_type) *reg_info_dummy; +#endif + +#ifdef DEBUG + /* Counts the total number of registers pushed. */ + unsigned num_regs_pushed = 0; +#endif + + DEBUG_PRINT1 ("\n\nEntering re_match_2.\n"); + + INIT_FAIL_STACK (); + +#ifdef MATCH_MAY_ALLOCATE + /* Do not bother to initialize all the register variables if there are + no groups in the pattern, as it takes a fair amount of time. If + there are groups, we include space for register 0 (the whole + pattern), even though we never use it, since it simplifies the + array indexing. We should fix this. */ + if (bufp->re_nsub) + { + regstart = REGEX_TALLOC (num_regs, const CHAR_T *); + regend = REGEX_TALLOC (num_regs, const CHAR_T *); + old_regstart = REGEX_TALLOC (num_regs, const CHAR_T *); + old_regend = REGEX_TALLOC (num_regs, const CHAR_T *); + best_regstart = REGEX_TALLOC (num_regs, const CHAR_T *); + best_regend = REGEX_TALLOC (num_regs, const CHAR_T *); + reg_info = REGEX_TALLOC (num_regs, PREFIX(register_info_type)); + reg_dummy = REGEX_TALLOC (num_regs, const CHAR_T *); + reg_info_dummy = REGEX_TALLOC (num_regs, PREFIX(register_info_type)); + + if (!(regstart && regend && old_regstart && old_regend && reg_info + && best_regstart && best_regend && reg_dummy && reg_info_dummy)) + { + FREE_VARIABLES (); + return -2; + } + } + else + { + /* We must initialize all our variables to NULL, so that + `FREE_VARIABLES' doesn't try to free them. */ + regstart = regend = old_regstart = old_regend = best_regstart + = best_regend = reg_dummy = NULL; + reg_info = reg_info_dummy = (PREFIX(register_info_type) *) NULL; + } +#endif /* MATCH_MAY_ALLOCATE */ + + /* The starting position is bogus. */ +#ifdef WCHAR + if (pos < 0 || pos > csize1 + csize2) +#else /* BYTE */ + if (pos < 0 || pos > size1 + size2) +#endif + { + FREE_VARIABLES (); + return -1; + } + +#ifdef WCHAR + /* Allocate wchar_t array for string1 and string2 and + fill them with converted string. */ + if (string1 == NULL && string2 == NULL) + { + /* We need seting up buffers here. */ + + /* We must free wcs buffers in this function. */ + cant_free_wcs_buf = 0; + + if (csize1 != 0) + { + string1 = REGEX_TALLOC (csize1 + 1, CHAR_T); + mbs_offset1 = REGEX_TALLOC (csize1 + 1, int); + is_binary = REGEX_TALLOC (csize1 + 1, char); + if (!string1 || !mbs_offset1 || !is_binary) + { + FREE_VAR (string1); + FREE_VAR (mbs_offset1); + FREE_VAR (is_binary); + return -2; + } + } + if (csize2 != 0) + { + string2 = REGEX_TALLOC (csize2 + 1, CHAR_T); + mbs_offset2 = REGEX_TALLOC (csize2 + 1, int); + is_binary = REGEX_TALLOC (csize2 + 1, char); + if (!string2 || !mbs_offset2 || !is_binary) + { + FREE_VAR (string1); + FREE_VAR (mbs_offset1); + FREE_VAR (string2); + FREE_VAR (mbs_offset2); + FREE_VAR (is_binary); + return -2; + } + size2 = convert_mbs_to_wcs(string2, cstring2, csize2, + mbs_offset2, is_binary); + string2[size2] = L'\0'; /* for a sentinel */ + FREE_VAR (is_binary); + } + } + + /* We need to cast pattern to (wchar_t*), because we casted this compiled + pattern to (char*) in regex_compile. */ + p = pattern = (CHAR_T*)bufp->buffer; + pend = (CHAR_T*)(bufp->buffer + bufp->used); + +#endif /* WCHAR */ + + /* Initialize subexpression text positions to -1 to mark ones that no + start_memory/stop_memory has been seen for. Also initialize the + register information struct. */ + for (mcnt = 1; (unsigned) mcnt < num_regs; mcnt++) + { + regstart[mcnt] = regend[mcnt] + = old_regstart[mcnt] = old_regend[mcnt] = REG_UNSET_VALUE; + + REG_MATCH_NULL_STRING_P (reg_info[mcnt]) = MATCH_NULL_UNSET_VALUE; + IS_ACTIVE (reg_info[mcnt]) = 0; + MATCHED_SOMETHING (reg_info[mcnt]) = 0; + EVER_MATCHED_SOMETHING (reg_info[mcnt]) = 0; + } + + /* We move `string1' into `string2' if the latter's empty -- but not if + `string1' is null. */ + if (size2 == 0 && string1 != NULL) + { + string2 = string1; + size2 = size1; + string1 = 0; + size1 = 0; +#ifdef WCHAR + mbs_offset2 = mbs_offset1; + csize2 = csize1; + mbs_offset1 = NULL; + csize1 = 0; +#endif + } + end1 = string1 + size1; + end2 = string2 + size2; + + /* Compute where to stop matching, within the two strings. */ +#ifdef WCHAR + if (stop <= csize1) + { + mcnt = count_mbs_length(mbs_offset1, stop); + end_match_1 = string1 + mcnt; + end_match_2 = string2; + } + else + { + if (stop > csize1 + csize2) + stop = csize1 + csize2; + end_match_1 = end1; + mcnt = count_mbs_length(mbs_offset2, stop-csize1); + end_match_2 = string2 + mcnt; + } + if (mcnt < 0) + { /* count_mbs_length return error. */ + FREE_VARIABLES (); + return -1; + } +#else + if (stop <= size1) + { + end_match_1 = string1 + stop; + end_match_2 = string2; + } + else + { + end_match_1 = end1; + end_match_2 = string2 + stop - size1; + } +#endif /* WCHAR */ + + /* `p' scans through the pattern as `d' scans through the data. + `dend' is the end of the input string that `d' points within. `d' + is advanced into the following input string whenever necessary, but + this happens before fetching; therefore, at the beginning of the + loop, `d' can be pointing at the end of a string, but it cannot + equal `string2'. */ +#ifdef WCHAR + if (size1 > 0 && pos <= csize1) + { + mcnt = count_mbs_length(mbs_offset1, pos); + d = string1 + mcnt; + dend = end_match_1; + } + else + { + mcnt = count_mbs_length(mbs_offset2, pos-csize1); + d = string2 + mcnt; + dend = end_match_2; + } + + if (mcnt < 0) + { /* count_mbs_length return error. */ + FREE_VARIABLES (); + return -1; + } +#else + if (size1 > 0 && pos <= size1) + { + d = string1 + pos; + dend = end_match_1; + } + else + { + d = string2 + pos - size1; + dend = end_match_2; + } +#endif /* WCHAR */ + + DEBUG_PRINT1 ("The compiled pattern is:\n"); + DEBUG_PRINT_COMPILED_PATTERN (bufp, p, pend); + DEBUG_PRINT1 ("The string to match is: `"); + DEBUG_PRINT_DOUBLE_STRING (d, string1, size1, string2, size2); + DEBUG_PRINT1 ("'\n"); + + /* This loops over pattern commands. It exits by returning from the + function if the match is complete, or it drops through if the match + fails at this starting point in the input data. */ + for (;;) + { +#ifdef _LIBC + DEBUG_PRINT2 ("\n%p: ", p); +#else + DEBUG_PRINT2 ("\n0x%x: ", p); +#endif + + if (p == pend) + { /* End of pattern means we might have succeeded. */ + DEBUG_PRINT1 ("end of pattern ... "); + + /* If we haven't matched the entire string, and we want the + longest match, try backtracking. */ + if (d != end_match_2) + { + /* 1 if this match ends in the same string (string1 or string2) + as the best previous match. */ + boolean same_str_p = (FIRST_STRING_P (match_end) + == MATCHING_IN_FIRST_STRING); + /* 1 if this match is the best seen so far. */ + boolean best_match_p; + + /* AIX compiler got confused when this was combined + with the previous declaration. */ + if (same_str_p) + best_match_p = d > match_end; + else + best_match_p = !MATCHING_IN_FIRST_STRING; + + DEBUG_PRINT1 ("backtracking.\n"); + + if (!FAIL_STACK_EMPTY ()) + { /* More failure points to try. */ + + /* If exceeds best match so far, save it. */ + if (!best_regs_set || best_match_p) + { + best_regs_set = true; + match_end = d; + + DEBUG_PRINT1 ("\nSAVING match as best so far.\n"); + + for (mcnt = 1; (unsigned) mcnt < num_regs; mcnt++) + { + best_regstart[mcnt] = regstart[mcnt]; + best_regend[mcnt] = regend[mcnt]; + } + } + goto fail; + } + + /* If no failure points, don't restore garbage. And if + last match is real best match, don't restore second + best one. */ + else if (best_regs_set && !best_match_p) + { + restore_best_regs: + /* Restore best match. It may happen that `dend == + end_match_1' while the restored d is in string2. + For example, the pattern `x.*y.*z' against the + strings `x-' and `y-z-', if the two strings are + not consecutive in memory. */ + DEBUG_PRINT1 ("Restoring best registers.\n"); + + d = match_end; + dend = ((d >= string1 && d <= end1) + ? end_match_1 : end_match_2); + + for (mcnt = 1; (unsigned) mcnt < num_regs; mcnt++) + { + regstart[mcnt] = best_regstart[mcnt]; + regend[mcnt] = best_regend[mcnt]; + } + } + } /* d != end_match_2 */ + + succeed_label: + DEBUG_PRINT1 ("Accepting match.\n"); + /* If caller wants register contents data back, do it. */ + if (regs && !bufp->no_sub) + { + /* Have the register data arrays been allocated? */ + if (bufp->regs_allocated == REGS_UNALLOCATED) + { /* No. So allocate them with malloc. We need one + extra element beyond `num_regs' for the `-1' marker + GNU code uses. */ + regs->num_regs = MAX (RE_NREGS, num_regs + 1); + regs->start = TALLOC (regs->num_regs, regoff_t); + regs->end = TALLOC (regs->num_regs, regoff_t); + if (regs->start == NULL || regs->end == NULL) + { + FREE_VARIABLES (); + return -2; + } + bufp->regs_allocated = REGS_REALLOCATE; + } + else if (bufp->regs_allocated == REGS_REALLOCATE) + { /* Yes. If we need more elements than were already + allocated, reallocate them. If we need fewer, just + leave it alone. */ + if (regs->num_regs < num_regs + 1) + { + regs->num_regs = num_regs + 1; + RETALLOC (regs->start, regs->num_regs, regoff_t); + RETALLOC (regs->end, regs->num_regs, regoff_t); + if (regs->start == NULL || regs->end == NULL) + { + FREE_VARIABLES (); + return -2; + } + } + } + else + { + /* These braces fend off a "empty body in an else-statement" + warning under GCC when assert expands to nothing. */ + assert (bufp->regs_allocated == REGS_FIXED); + } + + /* Convert the pointer data in `regstart' and `regend' to + indices. Register zero has to be set differently, + since we haven't kept track of any info for it. */ + if (regs->num_regs > 0) + { + regs->start[0] = pos; +#ifdef WCHAR + if (MATCHING_IN_FIRST_STRING) + regs->end[0] = mbs_offset1 != NULL ? + mbs_offset1[d-string1] : 0; + else + regs->end[0] = csize1 + (mbs_offset2 != NULL ? + mbs_offset2[d-string2] : 0); +#else + regs->end[0] = (MATCHING_IN_FIRST_STRING + ? ((regoff_t) (d - string1)) + : ((regoff_t) (d - string2 + size1))); +#endif /* WCHAR */ + } + + /* Go through the first `min (num_regs, regs->num_regs)' + registers, since that is all we initialized. */ + for (mcnt = 1; (unsigned) mcnt < MIN (num_regs, regs->num_regs); + mcnt++) + { + if (REG_UNSET (regstart[mcnt]) || REG_UNSET (regend[mcnt])) + regs->start[mcnt] = regs->end[mcnt] = -1; + else + { + regs->start[mcnt] + = (regoff_t) POINTER_TO_OFFSET (regstart[mcnt]); + regs->end[mcnt] + = (regoff_t) POINTER_TO_OFFSET (regend[mcnt]); + } + } + + /* If the regs structure we return has more elements than + were in the pattern, set the extra elements to -1. If + we (re)allocated the registers, this is the case, + because we always allocate enough to have at least one + -1 at the end. */ + for (mcnt = num_regs; (unsigned) mcnt < regs->num_regs; mcnt++) + regs->start[mcnt] = regs->end[mcnt] = -1; + } /* regs && !bufp->no_sub */ + + DEBUG_PRINT4 ("%u failure points pushed, %u popped (%u remain).\n", + nfailure_points_pushed, nfailure_points_popped, + nfailure_points_pushed - nfailure_points_popped); + DEBUG_PRINT2 ("%u registers pushed.\n", num_regs_pushed); + +#ifdef WCHAR + if (MATCHING_IN_FIRST_STRING) + mcnt = mbs_offset1 != NULL ? mbs_offset1[d-string1] : 0; + else + mcnt = (mbs_offset2 != NULL ? mbs_offset2[d-string2] : 0) + + csize1; + mcnt -= pos; +#else + mcnt = d - pos - (MATCHING_IN_FIRST_STRING + ? string1 + : string2 - size1); +#endif /* WCHAR */ + + DEBUG_PRINT2 ("Returning %d from re_match_2.\n", mcnt); + + FREE_VARIABLES (); + return mcnt; + } + + /* Otherwise match next pattern command. */ + switch (SWITCH_ENUM_CAST ((re_opcode_t) *p++)) + { + /* Ignore these. Used to ignore the n of succeed_n's which + currently have n == 0. */ + case no_op: + DEBUG_PRINT1 ("EXECUTING no_op.\n"); + break; + + case succeed: + DEBUG_PRINT1 ("EXECUTING succeed.\n"); + goto succeed_label; + + /* Match the next n pattern characters exactly. The following + byte in the pattern defines n, and the n bytes after that + are the characters to match. */ + case exactn: +#ifdef MBS_SUPPORT + case exactn_bin: +#endif + mcnt = *p++; + DEBUG_PRINT2 ("EXECUTING exactn %d.\n", mcnt); + + /* This is written out as an if-else so we don't waste time + testing `translate' inside the loop. */ + if (translate) + { + do + { + PREFETCH (); +#ifdef WCHAR + if (*d <= 0xff) + { + if ((UCHAR_T) translate[(unsigned char) *d++] + != (UCHAR_T) *p++) + goto fail; + } + else + { + if (*d++ != (CHAR_T) *p++) + goto fail; + } +#else + if ((UCHAR_T) translate[(unsigned char) *d++] + != (UCHAR_T) *p++) + goto fail; +#endif /* WCHAR */ + } + while (--mcnt); + } + else + { + do + { + PREFETCH (); + if (*d++ != (CHAR_T) *p++) goto fail; + } + while (--mcnt); + } + SET_REGS_MATCHED (); + break; + + + /* Match any character except possibly a newline or a null. */ + case anychar: + DEBUG_PRINT1 ("EXECUTING anychar.\n"); + + PREFETCH (); + + if ((!(bufp->syntax & RE_DOT_NEWLINE) && TRANSLATE (*d) == '\n') + || (bufp->syntax & RE_DOT_NOT_NULL && TRANSLATE (*d) == '\000')) + goto fail; + + SET_REGS_MATCHED (); + DEBUG_PRINT2 (" Matched `%ld'.\n", (long int) *d); + d++; + break; + + + case charset: + case charset_not: + { + register UCHAR_T c; +#ifdef WCHAR + unsigned int i, char_class_length, coll_symbol_length, + equiv_class_length, ranges_length, chars_length, length; + CHAR_T *workp, *workp2, *charset_top; +#define WORK_BUFFER_SIZE 128 + CHAR_T str_buf[WORK_BUFFER_SIZE]; +# ifdef _LIBC + uint32_t nrules; +# endif /* _LIBC */ +#endif /* WCHAR */ + boolean not = (re_opcode_t) *(p - 1) == charset_not; + + DEBUG_PRINT2 ("EXECUTING charset%s.\n", not ? "_not" : ""); + PREFETCH (); + c = TRANSLATE (*d); /* The character to match. */ +#ifdef WCHAR +# ifdef _LIBC + nrules = _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES); +# endif /* _LIBC */ + charset_top = p - 1; + char_class_length = *p++; + coll_symbol_length = *p++; + equiv_class_length = *p++; + ranges_length = *p++; + chars_length = *p++; + /* p points charset[6], so the address of the next instruction + (charset[l+m+n+2o+k+p']) equals p[l+m+n+2*o+p'], + where l=length of char_classes, m=length of collating_symbol, + n=equivalence_class, o=length of char_range, + p'=length of character. */ + workp = p; + /* Update p to indicate the next instruction. */ + p += char_class_length + coll_symbol_length+ equiv_class_length + + 2*ranges_length + chars_length; + + /* match with char_class? */ + for (i = 0; i < char_class_length ; i += CHAR_CLASS_SIZE) + { + wctype_t wctype; + uintptr_t alignedp = ((uintptr_t)workp + + __alignof__(wctype_t) - 1) + & ~(uintptr_t)(__alignof__(wctype_t) - 1); + wctype = *((wctype_t*)alignedp); + workp += CHAR_CLASS_SIZE; +# ifdef _LIBC + if (__iswctype((wint_t)c, wctype)) + goto char_set_matched; +# else + if (iswctype((wint_t)c, wctype)) + goto char_set_matched; +# endif + } + + /* match with collating_symbol? */ +# ifdef _LIBC + if (nrules != 0) + { + const unsigned char *extra = (const unsigned char *) + _NL_CURRENT (LC_COLLATE, _NL_COLLATE_SYMB_EXTRAMB); + + for (workp2 = workp + coll_symbol_length ; workp < workp2 ; + workp++) + { + int32_t *wextra; + wextra = (int32_t*)(extra + *workp++); + for (i = 0; i < *wextra; ++i) + if (TRANSLATE(d[i]) != wextra[1 + i]) + break; + + if (i == *wextra) + { + /* Update d, however d will be incremented at + char_set_matched:, we decrement d here. */ + d += i - 1; + goto char_set_matched; + } + } + } + else /* (nrules == 0) */ +# endif + /* If we can't look up collation data, we use wcscoll + instead. */ + { + for (workp2 = workp + coll_symbol_length ; workp < workp2 ;) + { + const CHAR_T *backup_d = d, *backup_dend = dend; +# ifdef _LIBC + length = __wcslen (workp); +# else + length = wcslen (workp); +# endif + + /* If wcscoll(the collating symbol, whole string) > 0, + any substring of the string never match with the + collating symbol. */ +# ifdef _LIBC + if (__wcscoll (workp, d) > 0) +# else + if (wcscoll (workp, d) > 0) +# endif + { + workp += length + 1; + continue; + } + + /* First, we compare the collating symbol with + the first character of the string. + If it don't match, we add the next character to + the compare buffer in turn. */ + for (i = 0 ; i < WORK_BUFFER_SIZE-1 ; i++, d++) + { + int match; + if (d == dend) + { + if (dend == end_match_2) + break; + d = string2; + dend = end_match_2; + } + + /* add next character to the compare buffer. */ + str_buf[i] = TRANSLATE(*d); + str_buf[i+1] = '\0'; + +# ifdef _LIBC + match = __wcscoll (workp, str_buf); +# else + match = wcscoll (workp, str_buf); +# endif + if (match == 0) + goto char_set_matched; + + if (match < 0) + /* (str_buf > workp) indicate (str_buf + X > workp), + because for all X (str_buf + X > str_buf). + So we don't need continue this loop. */ + break; + + /* Otherwise(str_buf < workp), + (str_buf+next_character) may equals (workp). + So we continue this loop. */ + } + /* not matched */ + d = backup_d; + dend = backup_dend; + workp += length + 1; + } + } + /* match with equivalence_class? */ +# ifdef _LIBC + if (nrules != 0) + { + const CHAR_T *backup_d = d, *backup_dend = dend; + /* Try to match the equivalence class against + those known to the collate implementation. */ + const int32_t *table; + const int32_t *weights; + const int32_t *extra; + const int32_t *indirect; + int32_t idx, idx2; + wint_t *cp; + size_t len; + + /* This #include defines a local function! */ +# include + + table = (const int32_t *) + _NL_CURRENT (LC_COLLATE, _NL_COLLATE_TABLEWC); + weights = (const wint_t *) + _NL_CURRENT (LC_COLLATE, _NL_COLLATE_WEIGHTWC); + extra = (const wint_t *) + _NL_CURRENT (LC_COLLATE, _NL_COLLATE_EXTRAWC); + indirect = (const int32_t *) + _NL_CURRENT (LC_COLLATE, _NL_COLLATE_INDIRECTWC); + + /* Write 1 collating element to str_buf, and + get its index. */ + idx2 = 0; + + for (i = 0 ; idx2 == 0 && i < WORK_BUFFER_SIZE - 1; i++) + { + cp = (wint_t*)str_buf; + if (d == dend) + { + if (dend == end_match_2) + break; + d = string2; + dend = end_match_2; + } + str_buf[i] = TRANSLATE(*(d+i)); + str_buf[i+1] = '\0'; /* sentinel */ + idx2 = findidx ((const wint_t**)&cp); + } + + /* Update d, however d will be incremented at + char_set_matched:, we decrement d here. */ + d = backup_d + ((wchar_t*)cp - (wchar_t*)str_buf - 1); + if (d >= dend) + { + if (dend == end_match_2) + d = dend; + else + { + d = string2; + dend = end_match_2; + } + } + + len = weights[idx2]; + + for (workp2 = workp + equiv_class_length ; workp < workp2 ; + workp++) + { + idx = (int32_t)*workp; + /* We already checked idx != 0 in regex_compile. */ + + if (idx2 != 0 && len == weights[idx]) + { + int cnt = 0; + while (cnt < len && (weights[idx + 1 + cnt] + == weights[idx2 + 1 + cnt])) + ++cnt; + + if (cnt == len) + goto char_set_matched; + } + } + /* not matched */ + d = backup_d; + dend = backup_dend; + } + else /* (nrules == 0) */ +# endif + /* If we can't look up collation data, we use wcscoll + instead. */ + { + for (workp2 = workp + equiv_class_length ; workp < workp2 ;) + { + const CHAR_T *backup_d = d, *backup_dend = dend; +# ifdef _LIBC + length = __wcslen (workp); +# else + length = wcslen (workp); +# endif + + /* If wcscoll(the collating symbol, whole string) > 0, + any substring of the string never match with the + collating symbol. */ +# ifdef _LIBC + if (__wcscoll (workp, d) > 0) +# else + if (wcscoll (workp, d) > 0) +# endif + { + workp += length + 1; + break; + } + + /* First, we compare the equivalence class with + the first character of the string. + If it don't match, we add the next character to + the compare buffer in turn. */ + for (i = 0 ; i < WORK_BUFFER_SIZE - 1 ; i++, d++) + { + int match; + if (d == dend) + { + if (dend == end_match_2) + break; + d = string2; + dend = end_match_2; + } + + /* add next character to the compare buffer. */ + str_buf[i] = TRANSLATE(*d); + str_buf[i+1] = '\0'; + +# ifdef _LIBC + match = __wcscoll (workp, str_buf); +# else + match = wcscoll (workp, str_buf); +# endif + + if (match == 0) + goto char_set_matched; + + if (match < 0) + /* (str_buf > workp) indicate (str_buf + X > workp), + because for all X (str_buf + X > str_buf). + So we don't need continue this loop. */ + break; + + /* Otherwise(str_buf < workp), + (str_buf+next_character) may equals (workp). + So we continue this loop. */ + } + /* not matched */ + d = backup_d; + dend = backup_dend; + workp += length + 1; + } + } + + /* match with char_range? */ +# ifdef _LIBC + if (nrules != 0) + { + uint32_t collseqval; + const char *collseq = (const char *) + _NL_CURRENT(LC_COLLATE, _NL_COLLATE_COLLSEQWC); + + collseqval = collseq_table_lookup (collseq, c); + + for (; workp < p - chars_length ;) + { + uint32_t start_val, end_val; + + /* We already compute the collation sequence value + of the characters (or collating symbols). */ + start_val = (uint32_t) *workp++; /* range_start */ + end_val = (uint32_t) *workp++; /* range_end */ + + if (start_val <= collseqval && collseqval <= end_val) + goto char_set_matched; + } + } + else +# endif + { + /* We set range_start_char at str_buf[0], range_end_char + at str_buf[4], and compared char at str_buf[2]. */ + str_buf[1] = 0; + str_buf[2] = c; + str_buf[3] = 0; + str_buf[5] = 0; + for (; workp < p - chars_length ;) + { + wchar_t *range_start_char, *range_end_char; + + /* match if (range_start_char <= c <= range_end_char). */ + + /* If range_start(or end) < 0, we assume -range_start(end) + is the offset of the collating symbol which is specified + as the character of the range start(end). */ + + /* range_start */ + if (*workp < 0) + range_start_char = charset_top - (*workp++); + else + { + str_buf[0] = *workp++; + range_start_char = str_buf; + } + + /* range_end */ + if (*workp < 0) + range_end_char = charset_top - (*workp++); + else + { + str_buf[4] = *workp++; + range_end_char = str_buf + 4; + } + +# ifdef _LIBC + if (__wcscoll (range_start_char, str_buf+2) <= 0 + && __wcscoll (str_buf+2, range_end_char) <= 0) +# else + if (wcscoll (range_start_char, str_buf+2) <= 0 + && wcscoll (str_buf+2, range_end_char) <= 0) +# endif + goto char_set_matched; + } + } + + /* match with char? */ + for (; workp < p ; workp++) + if (c == *workp) + goto char_set_matched; + + not = !not; + + char_set_matched: + if (not) goto fail; +#else + /* Cast to `unsigned' instead of `unsigned char' in case the + bit list is a full 32 bytes long. */ + if (c < (unsigned) (*p * BYTEWIDTH) + && p[1 + c / BYTEWIDTH] & (1 << (c % BYTEWIDTH))) + not = !not; + + p += 1 + *p; + + if (!not) goto fail; +#undef WORK_BUFFER_SIZE +#endif /* WCHAR */ + SET_REGS_MATCHED (); + d++; + break; + } + + + /* The beginning of a group is represented by start_memory. + The arguments are the register number in the next byte, and the + number of groups inner to this one in the next. The text + matched within the group is recorded (in the internal + registers data structure) under the register number. */ + case start_memory: + DEBUG_PRINT3 ("EXECUTING start_memory %ld (%ld):\n", + (long int) *p, (long int) p[1]); + + /* Find out if this group can match the empty string. */ + p1 = p; /* To send to group_match_null_string_p. */ + + if (REG_MATCH_NULL_STRING_P (reg_info[*p]) == MATCH_NULL_UNSET_VALUE) + REG_MATCH_NULL_STRING_P (reg_info[*p]) + = PREFIX(group_match_null_string_p) (&p1, pend, reg_info); + + /* Save the position in the string where we were the last time + we were at this open-group operator in case the group is + operated upon by a repetition operator, e.g., with `(a*)*b' + against `ab'; then we want to ignore where we are now in + the string in case this attempt to match fails. */ + old_regstart[*p] = REG_MATCH_NULL_STRING_P (reg_info[*p]) + ? REG_UNSET (regstart[*p]) ? d : regstart[*p] + : regstart[*p]; + DEBUG_PRINT2 (" old_regstart: %d\n", + POINTER_TO_OFFSET (old_regstart[*p])); + + regstart[*p] = d; + DEBUG_PRINT2 (" regstart: %d\n", POINTER_TO_OFFSET (regstart[*p])); + + IS_ACTIVE (reg_info[*p]) = 1; + MATCHED_SOMETHING (reg_info[*p]) = 0; + + /* Clear this whenever we change the register activity status. */ + set_regs_matched_done = 0; + + /* This is the new highest active register. */ + highest_active_reg = *p; + + /* If nothing was active before, this is the new lowest active + register. */ + if (lowest_active_reg == NO_LOWEST_ACTIVE_REG) + lowest_active_reg = *p; + + /* Move past the register number and inner group count. */ + p += 2; + just_past_start_mem = p; + + break; + + + /* The stop_memory opcode represents the end of a group. Its + arguments are the same as start_memory's: the register + number, and the number of inner groups. */ + case stop_memory: + DEBUG_PRINT3 ("EXECUTING stop_memory %ld (%ld):\n", + (long int) *p, (long int) p[1]); + + /* We need to save the string position the last time we were at + this close-group operator in case the group is operated + upon by a repetition operator, e.g., with `((a*)*(b*)*)*' + against `aba'; then we want to ignore where we are now in + the string in case this attempt to match fails. */ + old_regend[*p] = REG_MATCH_NULL_STRING_P (reg_info[*p]) + ? REG_UNSET (regend[*p]) ? d : regend[*p] + : regend[*p]; + DEBUG_PRINT2 (" old_regend: %d\n", + POINTER_TO_OFFSET (old_regend[*p])); + + regend[*p] = d; + DEBUG_PRINT2 (" regend: %d\n", POINTER_TO_OFFSET (regend[*p])); + + /* This register isn't active anymore. */ + IS_ACTIVE (reg_info[*p]) = 0; + + /* Clear this whenever we change the register activity status. */ + set_regs_matched_done = 0; + + /* If this was the only register active, nothing is active + anymore. */ + if (lowest_active_reg == highest_active_reg) + { + lowest_active_reg = NO_LOWEST_ACTIVE_REG; + highest_active_reg = NO_HIGHEST_ACTIVE_REG; + } + else + { /* We must scan for the new highest active register, since + it isn't necessarily one less than now: consider + (a(b)c(d(e)f)g). When group 3 ends, after the f), the + new highest active register is 1. */ + UCHAR_T r = *p - 1; + while (r > 0 && !IS_ACTIVE (reg_info[r])) + r--; + + /* If we end up at register zero, that means that we saved + the registers as the result of an `on_failure_jump', not + a `start_memory', and we jumped to past the innermost + `stop_memory'. For example, in ((.)*) we save + registers 1 and 2 as a result of the *, but when we pop + back to the second ), we are at the stop_memory 1. + Thus, nothing is active. */ + if (r == 0) + { + lowest_active_reg = NO_LOWEST_ACTIVE_REG; + highest_active_reg = NO_HIGHEST_ACTIVE_REG; + } + else + highest_active_reg = r; + } + + /* If just failed to match something this time around with a + group that's operated on by a repetition operator, try to + force exit from the ``loop'', and restore the register + information for this group that we had before trying this + last match. */ + if ((!MATCHED_SOMETHING (reg_info[*p]) + || just_past_start_mem == p - 1) + && (p + 2) < pend) + { + boolean is_a_jump_n = false; + + p1 = p + 2; + mcnt = 0; + switch ((re_opcode_t) *p1++) + { + case jump_n: + is_a_jump_n = true; + case pop_failure_jump: + case maybe_pop_jump: + case jump: + case dummy_failure_jump: + EXTRACT_NUMBER_AND_INCR (mcnt, p1); + if (is_a_jump_n) + p1 += OFFSET_ADDRESS_SIZE; + break; + + default: + /* do nothing */ ; + } + p1 += mcnt; + + /* If the next operation is a jump backwards in the pattern + to an on_failure_jump right before the start_memory + corresponding to this stop_memory, exit from the loop + by forcing a failure after pushing on the stack the + on_failure_jump's jump in the pattern, and d. */ + if (mcnt < 0 && (re_opcode_t) *p1 == on_failure_jump + && (re_opcode_t) p1[1+OFFSET_ADDRESS_SIZE] == start_memory + && p1[2+OFFSET_ADDRESS_SIZE] == *p) + { + /* If this group ever matched anything, then restore + what its registers were before trying this last + failed match, e.g., with `(a*)*b' against `ab' for + regstart[1], and, e.g., with `((a*)*(b*)*)*' + against `aba' for regend[3]. + + Also restore the registers for inner groups for, + e.g., `((a*)(b*))*' against `aba' (register 3 would + otherwise get trashed). */ + + if (EVER_MATCHED_SOMETHING (reg_info[*p])) + { + unsigned r; + + EVER_MATCHED_SOMETHING (reg_info[*p]) = 0; + + /* Restore this and inner groups' (if any) registers. */ + for (r = *p; r < (unsigned) *p + (unsigned) *(p + 1); + r++) + { + regstart[r] = old_regstart[r]; + + /* xx why this test? */ + if (old_regend[r] >= regstart[r]) + regend[r] = old_regend[r]; + } + } + p1++; + EXTRACT_NUMBER_AND_INCR (mcnt, p1); + PUSH_FAILURE_POINT (p1 + mcnt, d, -2); + + goto fail; + } + } + + /* Move past the register number and the inner group count. */ + p += 2; + break; + + + /* \ has been turned into a `duplicate' command which is + followed by the numeric value of as the register number. */ + case duplicate: + { + register const CHAR_T *d2, *dend2; + int regno = *p++; /* Get which register to match against. */ + DEBUG_PRINT2 ("EXECUTING duplicate %d.\n", regno); + + /* Can't back reference a group which we've never matched. */ + if (REG_UNSET (regstart[regno]) || REG_UNSET (regend[regno])) + goto fail; + + /* Where in input to try to start matching. */ + d2 = regstart[regno]; + + /* Where to stop matching; if both the place to start and + the place to stop matching are in the same string, then + set to the place to stop, otherwise, for now have to use + the end of the first string. */ + + dend2 = ((FIRST_STRING_P (regstart[regno]) + == FIRST_STRING_P (regend[regno])) + ? regend[regno] : end_match_1); + for (;;) + { + /* If necessary, advance to next segment in register + contents. */ + while (d2 == dend2) + { + if (dend2 == end_match_2) break; + if (dend2 == regend[regno]) break; + + /* End of string1 => advance to string2. */ + d2 = string2; + dend2 = regend[regno]; + } + /* At end of register contents => success */ + if (d2 == dend2) break; + + /* If necessary, advance to next segment in data. */ + PREFETCH (); + + /* How many characters left in this segment to match. */ + mcnt = dend - d; + + /* Want how many consecutive characters we can match in + one shot, so, if necessary, adjust the count. */ + if (mcnt > dend2 - d2) + mcnt = dend2 - d2; + + /* Compare that many; failure if mismatch, else move + past them. */ + if (translate + ? PREFIX(bcmp_translate) (d, d2, mcnt, translate) + : memcmp (d, d2, mcnt*sizeof(UCHAR_T))) + goto fail; + d += mcnt, d2 += mcnt; + + /* Do this because we've match some characters. */ + SET_REGS_MATCHED (); + } + } + break; + + + /* begline matches the empty string at the beginning of the string + (unless `not_bol' is set in `bufp'), and, if + `newline_anchor' is set, after newlines. */ + case begline: + DEBUG_PRINT1 ("EXECUTING begline.\n"); + + if (AT_STRINGS_BEG (d)) + { + if (!bufp->not_bol) break; + } + else if (d[-1] == '\n' && bufp->newline_anchor) + { + break; + } + /* In all other cases, we fail. */ + goto fail; + + + /* endline is the dual of begline. */ + case endline: + DEBUG_PRINT1 ("EXECUTING endline.\n"); + + if (AT_STRINGS_END (d)) + { + if (!bufp->not_eol) break; + } + + /* We have to ``prefetch'' the next character. */ + else if ((d == end1 ? *string2 : *d) == '\n' + && bufp->newline_anchor) + { + break; + } + goto fail; + + + /* Match at the very beginning of the data. */ + case begbuf: + DEBUG_PRINT1 ("EXECUTING begbuf.\n"); + if (AT_STRINGS_BEG (d)) + break; + goto fail; + + + /* Match at the very end of the data. */ + case endbuf: + DEBUG_PRINT1 ("EXECUTING endbuf.\n"); + if (AT_STRINGS_END (d)) + break; + goto fail; + + + /* on_failure_keep_string_jump is used to optimize `.*\n'. It + pushes NULL as the value for the string on the stack. Then + `pop_failure_point' will keep the current value for the + string, instead of restoring it. To see why, consider + matching `foo\nbar' against `.*\n'. The .* matches the foo; + then the . fails against the \n. But the next thing we want + to do is match the \n against the \n; if we restored the + string value, we would be back at the foo. + + Because this is used only in specific cases, we don't need to + check all the things that `on_failure_jump' does, to make + sure the right things get saved on the stack. Hence we don't + share its code. The only reason to push anything on the + stack at all is that otherwise we would have to change + `anychar's code to do something besides goto fail in this + case; that seems worse than this. */ + case on_failure_keep_string_jump: + DEBUG_PRINT1 ("EXECUTING on_failure_keep_string_jump"); + + EXTRACT_NUMBER_AND_INCR (mcnt, p); +#ifdef _LIBC + DEBUG_PRINT3 (" %d (to %p):\n", mcnt, p + mcnt); +#else + DEBUG_PRINT3 (" %d (to 0x%x):\n", mcnt, p + mcnt); +#endif + + PUSH_FAILURE_POINT (p + mcnt, NULL, -2); + break; + + + /* Uses of on_failure_jump: + + Each alternative starts with an on_failure_jump that points + to the beginning of the next alternative. Each alternative + except the last ends with a jump that in effect jumps past + the rest of the alternatives. (They really jump to the + ending jump of the following alternative, because tensioning + these jumps is a hassle.) + + Repeats start with an on_failure_jump that points past both + the repetition text and either the following jump or + pop_failure_jump back to this on_failure_jump. */ + case on_failure_jump: + on_failure: + DEBUG_PRINT1 ("EXECUTING on_failure_jump"); + + EXTRACT_NUMBER_AND_INCR (mcnt, p); +#ifdef _LIBC + DEBUG_PRINT3 (" %d (to %p)", mcnt, p + mcnt); +#else + DEBUG_PRINT3 (" %d (to 0x%x)", mcnt, p + mcnt); +#endif + + /* If this on_failure_jump comes right before a group (i.e., + the original * applied to a group), save the information + for that group and all inner ones, so that if we fail back + to this point, the group's information will be correct. + For example, in \(a*\)*\1, we need the preceding group, + and in \(zz\(a*\)b*\)\2, we need the inner group. */ + + /* We can't use `p' to check ahead because we push + a failure point to `p + mcnt' after we do this. */ + p1 = p; + + /* We need to skip no_op's before we look for the + start_memory in case this on_failure_jump is happening as + the result of a completed succeed_n, as in \(a\)\{1,3\}b\1 + against aba. */ + while (p1 < pend && (re_opcode_t) *p1 == no_op) + p1++; + + if (p1 < pend && (re_opcode_t) *p1 == start_memory) + { + /* We have a new highest active register now. This will + get reset at the start_memory we are about to get to, + but we will have saved all the registers relevant to + this repetition op, as described above. */ + highest_active_reg = *(p1 + 1) + *(p1 + 2); + if (lowest_active_reg == NO_LOWEST_ACTIVE_REG) + lowest_active_reg = *(p1 + 1); + } + + DEBUG_PRINT1 (":\n"); + PUSH_FAILURE_POINT (p + mcnt, d, -2); + break; + + + /* A smart repeat ends with `maybe_pop_jump'. + We change it to either `pop_failure_jump' or `jump'. */ + case maybe_pop_jump: + EXTRACT_NUMBER_AND_INCR (mcnt, p); + DEBUG_PRINT2 ("EXECUTING maybe_pop_jump %d.\n", mcnt); + { + register UCHAR_T *p2 = p; + + /* Compare the beginning of the repeat with what in the + pattern follows its end. If we can establish that there + is nothing that they would both match, i.e., that we + would have to backtrack because of (as in, e.g., `a*a') + then we can change to pop_failure_jump, because we'll + never have to backtrack. + + This is not true in the case of alternatives: in + `(a|ab)*' we do need to backtrack to the `ab' alternative + (e.g., if the string was `ab'). But instead of trying to + detect that here, the alternative has put on a dummy + failure point which is what we will end up popping. */ + + /* Skip over open/close-group commands. + If what follows this loop is a ...+ construct, + look at what begins its body, since we will have to + match at least one of that. */ + while (1) + { + if (p2 + 2 < pend + && ((re_opcode_t) *p2 == stop_memory + || (re_opcode_t) *p2 == start_memory)) + p2 += 3; + else if (p2 + 2 + 2 * OFFSET_ADDRESS_SIZE < pend + && (re_opcode_t) *p2 == dummy_failure_jump) + p2 += 2 + 2 * OFFSET_ADDRESS_SIZE; + else + break; + } + + p1 = p + mcnt; + /* p1[0] ... p1[2] are the `on_failure_jump' corresponding + to the `maybe_finalize_jump' of this case. Examine what + follows. */ + + /* If we're at the end of the pattern, we can change. */ + if (p2 == pend) + { + /* Consider what happens when matching ":\(.*\)" + against ":/". I don't really understand this code + yet. */ + p[-(1+OFFSET_ADDRESS_SIZE)] = (UCHAR_T) + pop_failure_jump; + DEBUG_PRINT1 + (" End of pattern: change to `pop_failure_jump'.\n"); + } + + else if ((re_opcode_t) *p2 == exactn +#ifdef MBS_SUPPORT + || (re_opcode_t) *p2 == exactn_bin +#endif + || (bufp->newline_anchor && (re_opcode_t) *p2 == endline)) + { + register UCHAR_T c + = *p2 == (UCHAR_T) endline ? '\n' : p2[2]; + + if (((re_opcode_t) p1[1+OFFSET_ADDRESS_SIZE] == exactn +#ifdef MBS_SUPPORT + || (re_opcode_t) p1[1+OFFSET_ADDRESS_SIZE] == exactn_bin +#endif + ) && p1[3+OFFSET_ADDRESS_SIZE] != c) + { + p[-(1+OFFSET_ADDRESS_SIZE)] = (UCHAR_T) + pop_failure_jump; +#ifdef WCHAR + DEBUG_PRINT3 (" %C != %C => pop_failure_jump.\n", + (wint_t) c, + (wint_t) p1[3+OFFSET_ADDRESS_SIZE]); +#else + DEBUG_PRINT3 (" %c != %c => pop_failure_jump.\n", + (char) c, + (char) p1[3+OFFSET_ADDRESS_SIZE]); +#endif + } + +#ifndef WCHAR + else if ((re_opcode_t) p1[3] == charset + || (re_opcode_t) p1[3] == charset_not) + { + int not = (re_opcode_t) p1[3] == charset_not; + + if (c < (unsigned) (p1[4] * BYTEWIDTH) + && p1[5 + c / BYTEWIDTH] & (1 << (c % BYTEWIDTH))) + not = !not; + + /* `not' is equal to 1 if c would match, which means + that we can't change to pop_failure_jump. */ + if (!not) + { + p[-3] = (unsigned char) pop_failure_jump; + DEBUG_PRINT1 (" No match => pop_failure_jump.\n"); + } + } +#endif /* not WCHAR */ + } +#ifndef WCHAR + else if ((re_opcode_t) *p2 == charset) + { + /* We win if the first character of the loop is not part + of the charset. */ + if ((re_opcode_t) p1[3] == exactn + && ! ((int) p2[1] * BYTEWIDTH > (int) p1[5] + && (p2[2 + p1[5] / BYTEWIDTH] + & (1 << (p1[5] % BYTEWIDTH))))) + { + p[-3] = (unsigned char) pop_failure_jump; + DEBUG_PRINT1 (" No match => pop_failure_jump.\n"); + } + + else if ((re_opcode_t) p1[3] == charset_not) + { + int idx; + /* We win if the charset_not inside the loop + lists every character listed in the charset after. */ + for (idx = 0; idx < (int) p2[1]; idx++) + if (! (p2[2 + idx] == 0 + || (idx < (int) p1[4] + && ((p2[2 + idx] & ~ p1[5 + idx]) == 0)))) + break; + + if (idx == p2[1]) + { + p[-3] = (unsigned char) pop_failure_jump; + DEBUG_PRINT1 (" No match => pop_failure_jump.\n"); + } + } + else if ((re_opcode_t) p1[3] == charset) + { + int idx; + /* We win if the charset inside the loop + has no overlap with the one after the loop. */ + for (idx = 0; + idx < (int) p2[1] && idx < (int) p1[4]; + idx++) + if ((p2[2 + idx] & p1[5 + idx]) != 0) + break; + + if (idx == p2[1] || idx == p1[4]) + { + p[-3] = (unsigned char) pop_failure_jump; + DEBUG_PRINT1 (" No match => pop_failure_jump.\n"); + } + } + } +#endif /* not WCHAR */ + } + p -= OFFSET_ADDRESS_SIZE; /* Point at relative address again. */ + if ((re_opcode_t) p[-1] != pop_failure_jump) + { + p[-1] = (UCHAR_T) jump; + DEBUG_PRINT1 (" Match => jump.\n"); + goto unconditional_jump; + } + /* Note fall through. */ + + + /* The end of a simple repeat has a pop_failure_jump back to + its matching on_failure_jump, where the latter will push a + failure point. The pop_failure_jump takes off failure + points put on by this pop_failure_jump's matching + on_failure_jump; we got through the pattern to here from the + matching on_failure_jump, so didn't fail. */ + case pop_failure_jump: + { + /* We need to pass separate storage for the lowest and + highest registers, even though we don't care about the + actual values. Otherwise, we will restore only one + register from the stack, since lowest will == highest in + `pop_failure_point'. */ + active_reg_t dummy_low_reg, dummy_high_reg; + UCHAR_T *pdummy = NULL; + const CHAR_T *sdummy = NULL; + + DEBUG_PRINT1 ("EXECUTING pop_failure_jump.\n"); + POP_FAILURE_POINT (sdummy, pdummy, + dummy_low_reg, dummy_high_reg, + reg_dummy, reg_dummy, reg_info_dummy); + } + /* Note fall through. */ + + unconditional_jump: +#ifdef _LIBC + DEBUG_PRINT2 ("\n%p: ", p); +#else + DEBUG_PRINT2 ("\n0x%x: ", p); +#endif + /* Note fall through. */ + + /* Unconditionally jump (without popping any failure points). */ + case jump: + EXTRACT_NUMBER_AND_INCR (mcnt, p); /* Get the amount to jump. */ + DEBUG_PRINT2 ("EXECUTING jump %d ", mcnt); + p += mcnt; /* Do the jump. */ +#ifdef _LIBC + DEBUG_PRINT2 ("(to %p).\n", p); +#else + DEBUG_PRINT2 ("(to 0x%x).\n", p); +#endif + break; + + + /* We need this opcode so we can detect where alternatives end + in `group_match_null_string_p' et al. */ + case jump_past_alt: + DEBUG_PRINT1 ("EXECUTING jump_past_alt.\n"); + goto unconditional_jump; + + + /* Normally, the on_failure_jump pushes a failure point, which + then gets popped at pop_failure_jump. We will end up at + pop_failure_jump, also, and with a pattern of, say, `a+', we + are skipping over the on_failure_jump, so we have to push + something meaningless for pop_failure_jump to pop. */ + case dummy_failure_jump: + DEBUG_PRINT1 ("EXECUTING dummy_failure_jump.\n"); + /* It doesn't matter what we push for the string here. What + the code at `fail' tests is the value for the pattern. */ + PUSH_FAILURE_POINT (NULL, NULL, -2); + goto unconditional_jump; + + + /* At the end of an alternative, we need to push a dummy failure + point in case we are followed by a `pop_failure_jump', because + we don't want the failure point for the alternative to be + popped. For example, matching `(a|ab)*' against `aab' + requires that we match the `ab' alternative. */ + case push_dummy_failure: + DEBUG_PRINT1 ("EXECUTING push_dummy_failure.\n"); + /* See comments just above at `dummy_failure_jump' about the + two zeroes. */ + PUSH_FAILURE_POINT (NULL, NULL, -2); + break; + + /* Have to succeed matching what follows at least n times. + After that, handle like `on_failure_jump'. */ + case succeed_n: + EXTRACT_NUMBER (mcnt, p + OFFSET_ADDRESS_SIZE); + DEBUG_PRINT2 ("EXECUTING succeed_n %d.\n", mcnt); + + assert (mcnt >= 0); + /* Originally, this is how many times we HAVE to succeed. */ + if (mcnt > 0) + { + mcnt--; + p += OFFSET_ADDRESS_SIZE; + STORE_NUMBER_AND_INCR (p, mcnt); +#ifdef _LIBC + DEBUG_PRINT3 (" Setting %p to %d.\n", p - OFFSET_ADDRESS_SIZE + , mcnt); +#else + DEBUG_PRINT3 (" Setting 0x%x to %d.\n", p - OFFSET_ADDRESS_SIZE + , mcnt); +#endif + } + else if (mcnt == 0) + { +#ifdef _LIBC + DEBUG_PRINT2 (" Setting two bytes from %p to no_op.\n", + p + OFFSET_ADDRESS_SIZE); +#else + DEBUG_PRINT2 (" Setting two bytes from 0x%x to no_op.\n", + p + OFFSET_ADDRESS_SIZE); +#endif /* _LIBC */ + +#ifdef WCHAR + p[1] = (UCHAR_T) no_op; +#else + p[2] = (UCHAR_T) no_op; + p[3] = (UCHAR_T) no_op; +#endif /* WCHAR */ + goto on_failure; + } + break; + + case jump_n: + EXTRACT_NUMBER (mcnt, p + OFFSET_ADDRESS_SIZE); + DEBUG_PRINT2 ("EXECUTING jump_n %d.\n", mcnt); + + /* Originally, this is how many times we CAN jump. */ + if (mcnt) + { + mcnt--; + STORE_NUMBER (p + OFFSET_ADDRESS_SIZE, mcnt); + +#ifdef _LIBC + DEBUG_PRINT3 (" Setting %p to %d.\n", p + OFFSET_ADDRESS_SIZE, + mcnt); +#else + DEBUG_PRINT3 (" Setting 0x%x to %d.\n", p + OFFSET_ADDRESS_SIZE, + mcnt); +#endif /* _LIBC */ + goto unconditional_jump; + } + /* If don't have to jump any more, skip over the rest of command. */ + else + p += 2 * OFFSET_ADDRESS_SIZE; + break; + + case set_number_at: + { + DEBUG_PRINT1 ("EXECUTING set_number_at.\n"); + + EXTRACT_NUMBER_AND_INCR (mcnt, p); + p1 = p + mcnt; + EXTRACT_NUMBER_AND_INCR (mcnt, p); +#ifdef _LIBC + DEBUG_PRINT3 (" Setting %p to %d.\n", p1, mcnt); +#else + DEBUG_PRINT3 (" Setting 0x%x to %d.\n", p1, mcnt); +#endif + STORE_NUMBER (p1, mcnt); + break; + } + +#if 0 + /* The DEC Alpha C compiler 3.x generates incorrect code for the + test WORDCHAR_P (d - 1) != WORDCHAR_P (d) in the expansion of + AT_WORD_BOUNDARY, so this code is disabled. Expanding the + macro and introducing temporary variables works around the bug. */ + + case wordbound: + DEBUG_PRINT1 ("EXECUTING wordbound.\n"); + if (AT_WORD_BOUNDARY (d)) + break; + goto fail; + + case notwordbound: + DEBUG_PRINT1 ("EXECUTING notwordbound.\n"); + if (AT_WORD_BOUNDARY (d)) + goto fail; + break; +#else + case wordbound: + { + boolean prevchar, thischar; + + DEBUG_PRINT1 ("EXECUTING wordbound.\n"); + if (AT_STRINGS_BEG (d) || AT_STRINGS_END (d)) + break; + + prevchar = WORDCHAR_P (d - 1); + thischar = WORDCHAR_P (d); + if (prevchar != thischar) + break; + goto fail; + } + + case notwordbound: + { + boolean prevchar, thischar; + + DEBUG_PRINT1 ("EXECUTING notwordbound.\n"); + if (AT_STRINGS_BEG (d) || AT_STRINGS_END (d)) + goto fail; + + prevchar = WORDCHAR_P (d - 1); + thischar = WORDCHAR_P (d); + if (prevchar != thischar) + goto fail; + break; + } +#endif + + case wordbeg: + DEBUG_PRINT1 ("EXECUTING wordbeg.\n"); + if (!AT_STRINGS_END (d) && WORDCHAR_P (d) + && (AT_STRINGS_BEG (d) || !WORDCHAR_P (d - 1))) + break; + goto fail; + + case wordend: + DEBUG_PRINT1 ("EXECUTING wordend.\n"); + if (!AT_STRINGS_BEG (d) && WORDCHAR_P (d - 1) + && (AT_STRINGS_END (d) || !WORDCHAR_P (d))) + break; + goto fail; + +#ifdef emacs + case before_dot: + DEBUG_PRINT1 ("EXECUTING before_dot.\n"); + if (PTR_CHAR_POS ((unsigned char *) d) >= point) + goto fail; + break; + + case at_dot: + DEBUG_PRINT1 ("EXECUTING at_dot.\n"); + if (PTR_CHAR_POS ((unsigned char *) d) != point) + goto fail; + break; + + case after_dot: + DEBUG_PRINT1 ("EXECUTING after_dot.\n"); + if (PTR_CHAR_POS ((unsigned char *) d) <= point) + goto fail; + break; + + case syntaxspec: + DEBUG_PRINT2 ("EXECUTING syntaxspec %d.\n", mcnt); + mcnt = *p++; + goto matchsyntax; + + case wordchar: + DEBUG_PRINT1 ("EXECUTING Emacs wordchar.\n"); + mcnt = (int) Sword; + matchsyntax: + PREFETCH (); + /* Can't use *d++ here; SYNTAX may be an unsafe macro. */ + d++; + if (SYNTAX (d[-1]) != (enum syntaxcode) mcnt) + goto fail; + SET_REGS_MATCHED (); + break; + + case notsyntaxspec: + DEBUG_PRINT2 ("EXECUTING notsyntaxspec %d.\n", mcnt); + mcnt = *p++; + goto matchnotsyntax; + + case notwordchar: + DEBUG_PRINT1 ("EXECUTING Emacs notwordchar.\n"); + mcnt = (int) Sword; + matchnotsyntax: + PREFETCH (); + /* Can't use *d++ here; SYNTAX may be an unsafe macro. */ + d++; + if (SYNTAX (d[-1]) == (enum syntaxcode) mcnt) + goto fail; + SET_REGS_MATCHED (); + break; + +#else /* not emacs */ + case wordchar: + DEBUG_PRINT1 ("EXECUTING non-Emacs wordchar.\n"); + PREFETCH (); + if (!WORDCHAR_P (d)) + goto fail; + SET_REGS_MATCHED (); + d++; + break; + + case notwordchar: + DEBUG_PRINT1 ("EXECUTING non-Emacs notwordchar.\n"); + PREFETCH (); + if (WORDCHAR_P (d)) + goto fail; + SET_REGS_MATCHED (); + d++; + break; +#endif /* not emacs */ + + default: + abort (); + } + continue; /* Successfully executed one pattern command; keep going. */ + + + /* We goto here if a matching operation fails. */ + fail: + if (!FAIL_STACK_EMPTY ()) + { /* A restart point is known. Restore to that state. */ + DEBUG_PRINT1 ("\nFAIL:\n"); + POP_FAILURE_POINT (d, p, + lowest_active_reg, highest_active_reg, + regstart, regend, reg_info); + + /* If this failure point is a dummy, try the next one. */ + if (!p) + goto fail; + + /* If we failed to the end of the pattern, don't examine *p. */ + assert (p <= pend); + if (p < pend) + { + boolean is_a_jump_n = false; + + /* If failed to a backwards jump that's part of a repetition + loop, need to pop this failure point and use the next one. */ + switch ((re_opcode_t) *p) + { + case jump_n: + is_a_jump_n = true; + case maybe_pop_jump: + case pop_failure_jump: + case jump: + p1 = p + 1; + EXTRACT_NUMBER_AND_INCR (mcnt, p1); + p1 += mcnt; + + if ((is_a_jump_n && (re_opcode_t) *p1 == succeed_n) + || (!is_a_jump_n + && (re_opcode_t) *p1 == on_failure_jump)) + goto fail; + break; + default: + /* do nothing */ ; + } + } + + if (d >= string1 && d <= end1) + dend = end_match_1; + } + else + break; /* Matching at this starting point really fails. */ + } /* for (;;) */ + + if (best_regs_set) + goto restore_best_regs; + + FREE_VARIABLES (); + + return -1; /* Failure to match. */ +} /* re_match_2 */ + +/* Subroutine definitions for re_match_2. */ + + +/* We are passed P pointing to a register number after a start_memory. + + Return true if the pattern up to the corresponding stop_memory can + match the empty string, and false otherwise. + + If we find the matching stop_memory, sets P to point to one past its number. + Otherwise, sets P to an undefined byte less than or equal to END. + + We don't handle duplicates properly (yet). */ + +static boolean +PREFIX(group_match_null_string_p) (p, end, reg_info) + UCHAR_T **p, *end; + PREFIX(register_info_type) *reg_info; +{ + int mcnt; + /* Point to after the args to the start_memory. */ + UCHAR_T *p1 = *p + 2; + + while (p1 < end) + { + /* Skip over opcodes that can match nothing, and return true or + false, as appropriate, when we get to one that can't, or to the + matching stop_memory. */ + + switch ((re_opcode_t) *p1) + { + /* Could be either a loop or a series of alternatives. */ + case on_failure_jump: + p1++; + EXTRACT_NUMBER_AND_INCR (mcnt, p1); + + /* If the next operation is not a jump backwards in the + pattern. */ + + if (mcnt >= 0) + { + /* Go through the on_failure_jumps of the alternatives, + seeing if any of the alternatives cannot match nothing. + The last alternative starts with only a jump, + whereas the rest start with on_failure_jump and end + with a jump, e.g., here is the pattern for `a|b|c': + + /on_failure_jump/0/6/exactn/1/a/jump_past_alt/0/6 + /on_failure_jump/0/6/exactn/1/b/jump_past_alt/0/3 + /exactn/1/c + + So, we have to first go through the first (n-1) + alternatives and then deal with the last one separately. */ + + + /* Deal with the first (n-1) alternatives, which start + with an on_failure_jump (see above) that jumps to right + past a jump_past_alt. */ + + while ((re_opcode_t) p1[mcnt-(1+OFFSET_ADDRESS_SIZE)] == + jump_past_alt) + { + /* `mcnt' holds how many bytes long the alternative + is, including the ending `jump_past_alt' and + its number. */ + + if (!PREFIX(alt_match_null_string_p) (p1, p1 + mcnt - + (1 + OFFSET_ADDRESS_SIZE), + reg_info)) + return false; + + /* Move to right after this alternative, including the + jump_past_alt. */ + p1 += mcnt; + + /* Break if it's the beginning of an n-th alternative + that doesn't begin with an on_failure_jump. */ + if ((re_opcode_t) *p1 != on_failure_jump) + break; + + /* Still have to check that it's not an n-th + alternative that starts with an on_failure_jump. */ + p1++; + EXTRACT_NUMBER_AND_INCR (mcnt, p1); + if ((re_opcode_t) p1[mcnt-(1+OFFSET_ADDRESS_SIZE)] != + jump_past_alt) + { + /* Get to the beginning of the n-th alternative. */ + p1 -= 1 + OFFSET_ADDRESS_SIZE; + break; + } + } + + /* Deal with the last alternative: go back and get number + of the `jump_past_alt' just before it. `mcnt' contains + the length of the alternative. */ + EXTRACT_NUMBER (mcnt, p1 - OFFSET_ADDRESS_SIZE); + + if (!PREFIX(alt_match_null_string_p) (p1, p1 + mcnt, reg_info)) + return false; + + p1 += mcnt; /* Get past the n-th alternative. */ + } /* if mcnt > 0 */ + break; + + + case stop_memory: + assert (p1[1] == **p); + *p = p1 + 2; + return true; + + + default: + if (!PREFIX(common_op_match_null_string_p) (&p1, end, reg_info)) + return false; + } + } /* while p1 < end */ + + return false; +} /* group_match_null_string_p */ + + +/* Similar to group_match_null_string_p, but doesn't deal with alternatives: + It expects P to be the first byte of a single alternative and END one + byte past the last. The alternative can contain groups. */ + +static boolean +PREFIX(alt_match_null_string_p) (p, end, reg_info) + UCHAR_T *p, *end; + PREFIX(register_info_type) *reg_info; +{ + int mcnt; + UCHAR_T *p1 = p; + + while (p1 < end) + { + /* Skip over opcodes that can match nothing, and break when we get + to one that can't. */ + + switch ((re_opcode_t) *p1) + { + /* It's a loop. */ + case on_failure_jump: + p1++; + EXTRACT_NUMBER_AND_INCR (mcnt, p1); + p1 += mcnt; + break; + + default: + if (!PREFIX(common_op_match_null_string_p) (&p1, end, reg_info)) + return false; + } + } /* while p1 < end */ + + return true; +} /* alt_match_null_string_p */ + + +/* Deals with the ops common to group_match_null_string_p and + alt_match_null_string_p. + + Sets P to one after the op and its arguments, if any. */ + +static boolean +PREFIX(common_op_match_null_string_p) (p, end, reg_info) + UCHAR_T **p, *end; + PREFIX(register_info_type) *reg_info; +{ + int mcnt; + boolean ret; + int reg_no; + UCHAR_T *p1 = *p; + + switch ((re_opcode_t) *p1++) + { + case no_op: + case begline: + case endline: + case begbuf: + case endbuf: + case wordbeg: + case wordend: + case wordbound: + case notwordbound: +#ifdef emacs + case before_dot: + case at_dot: + case after_dot: +#endif + break; + + case start_memory: + reg_no = *p1; + assert (reg_no > 0 && reg_no <= MAX_REGNUM); + ret = PREFIX(group_match_null_string_p) (&p1, end, reg_info); + + /* Have to set this here in case we're checking a group which + contains a group and a back reference to it. */ + + if (REG_MATCH_NULL_STRING_P (reg_info[reg_no]) == MATCH_NULL_UNSET_VALUE) + REG_MATCH_NULL_STRING_P (reg_info[reg_no]) = ret; + + if (!ret) + return false; + break; + + /* If this is an optimized succeed_n for zero times, make the jump. */ + case jump: + EXTRACT_NUMBER_AND_INCR (mcnt, p1); + if (mcnt >= 0) + p1 += mcnt; + else + return false; + break; + + case succeed_n: + /* Get to the number of times to succeed. */ + p1 += OFFSET_ADDRESS_SIZE; + EXTRACT_NUMBER_AND_INCR (mcnt, p1); + + if (mcnt == 0) + { + p1 -= 2 * OFFSET_ADDRESS_SIZE; + EXTRACT_NUMBER_AND_INCR (mcnt, p1); + p1 += mcnt; + } + else + return false; + break; + + case duplicate: + if (!REG_MATCH_NULL_STRING_P (reg_info[*p1])) + return false; + break; + + case set_number_at: + p1 += 2 * OFFSET_ADDRESS_SIZE; + + default: + /* All other opcodes mean we cannot match the empty string. */ + return false; + } + + *p = p1; + return true; +} /* common_op_match_null_string_p */ + + +/* Return zero if TRANSLATE[S1] and TRANSLATE[S2] are identical for LEN + bytes; nonzero otherwise. */ + +static int +PREFIX(bcmp_translate) (s1, s2, len, translate) + const CHAR_T *s1, *s2; + register int len; + RE_TRANSLATE_TYPE translate; +{ + register const UCHAR_T *p1 = (const UCHAR_T *) s1; + register const UCHAR_T *p2 = (const UCHAR_T *) s2; + while (len) + { +#ifdef WCHAR + if (((*p1<=0xff)?translate[*p1++]:*p1++) + != ((*p2<=0xff)?translate[*p2++]:*p2++)) + return 1; +#else /* BYTE */ + if (translate[*p1++] != translate[*p2++]) return 1; +#endif /* WCHAR */ + len--; + } + return 0; +} + + +#else /* not INSIDE_RECURSION */ + +/* Entry points for GNU code. */ + +/* re_compile_pattern is the GNU regular expression compiler: it + compiles PATTERN (of length SIZE) and puts the result in BUFP. + Returns 0 if the pattern was valid, otherwise an error string. + + Assumes the `allocated' (and perhaps `buffer') and `translate' fields + are set in BUFP on entry. + + We call regex_compile to do the actual compilation. */ + +const char * +re_compile_pattern (pattern, length, bufp) + const char *pattern; + size_t length; + struct re_pattern_buffer *bufp; +{ + reg_errcode_t ret; + + /* GNU code is written to assume at least RE_NREGS registers will be set + (and at least one extra will be -1). */ + bufp->regs_allocated = REGS_UNALLOCATED; + + /* And GNU code determines whether or not to get register information + by passing null for the REGS argument to re_match, etc., not by + setting no_sub. */ + bufp->no_sub = 0; + + /* Match anchors at newline. */ + bufp->newline_anchor = 1; + +# ifdef MBS_SUPPORT + if (MB_CUR_MAX != 1) + ret = wcs_regex_compile (pattern, length, re_syntax_options, bufp); + else +# endif + ret = byte_regex_compile (pattern, length, re_syntax_options, bufp); + + if (!ret) + return NULL; + return gettext (re_error_msgid + re_error_msgid_idx[(int) ret]); +} +#ifdef _LIBC +weak_alias (__re_compile_pattern, re_compile_pattern) +#endif + +/* Entry points compatible with 4.2 BSD regex library. We don't define + them unless specifically requested. */ + +#if defined _REGEX_RE_COMP || defined _LIBC + +/* BSD has one and only one pattern buffer. */ +static struct re_pattern_buffer re_comp_buf; + +char * +#ifdef _LIBC +/* Make these definitions weak in libc, so POSIX programs can redefine + these names if they don't use our functions, and still use + regcomp/regexec below without link errors. */ +weak_function +#endif +re_comp (s) + const char *s; +{ + reg_errcode_t ret; + + if (!s) + { + if (!re_comp_buf.buffer) + return gettext ("No previous regular expression"); + return 0; + } + + if (!re_comp_buf.buffer) + { + re_comp_buf.buffer = (unsigned char *) malloc (200); + if (re_comp_buf.buffer == NULL) + return (char *) gettext (re_error_msgid + + re_error_msgid_idx[(int) REG_ESPACE]); + re_comp_buf.allocated = 200; + + re_comp_buf.fastmap = (char *) malloc (1 << BYTEWIDTH); + if (re_comp_buf.fastmap == NULL) + return (char *) gettext (re_error_msgid + + re_error_msgid_idx[(int) REG_ESPACE]); + } + + /* Since `re_exec' always passes NULL for the `regs' argument, we + don't need to initialize the pattern buffer fields which affect it. */ + + /* Match anchors at newlines. */ + re_comp_buf.newline_anchor = 1; + +# ifdef MBS_SUPPORT + if (MB_CUR_MAX != 1) + ret = wcs_regex_compile (s, strlen (s), re_syntax_options, &re_comp_buf); + else +# endif + ret = byte_regex_compile (s, strlen (s), re_syntax_options, &re_comp_buf); + + if (!ret) + return NULL; + + /* Yes, we're discarding `const' here if !HAVE_LIBINTL. */ + return (char *) gettext (re_error_msgid + re_error_msgid_idx[(int) ret]); +} + + +int +#ifdef _LIBC +weak_function +#endif +re_exec (s) + const char *s; +{ + const int len = strlen (s); + return + 0 <= re_search (&re_comp_buf, s, len, 0, len, (struct re_registers *) 0); +} + +#endif /* _REGEX_RE_COMP */ + +/* POSIX.2 functions. Don't define these for Emacs. */ + +#ifndef emacs + +/* regcomp takes a regular expression as a string and compiles it. + + PREG is a regex_t *. We do not expect any fields to be initialized, + since POSIX says we shouldn't. Thus, we set + + `buffer' to the compiled pattern; + `used' to the length of the compiled pattern; + `syntax' to RE_SYNTAX_POSIX_EXTENDED if the + REG_EXTENDED bit in CFLAGS is set; otherwise, to + RE_SYNTAX_POSIX_BASIC; + `newline_anchor' to REG_NEWLINE being set in CFLAGS; + `fastmap' to an allocated space for the fastmap; + `fastmap_accurate' to zero; + `re_nsub' to the number of subexpressions in PATTERN. + + PATTERN is the address of the pattern string. + + CFLAGS is a series of bits which affect compilation. + + If REG_EXTENDED is set, we use POSIX extended syntax; otherwise, we + use POSIX basic syntax. + + If REG_NEWLINE is set, then . and [^...] don't match newline. + Also, regexec will try a match beginning after every newline. + + If REG_ICASE is set, then we considers upper- and lowercase + versions of letters to be equivalent when matching. + + If REG_NOSUB is set, then when PREG is passed to regexec, that + routine will report only success or failure, and nothing about the + registers. + + It returns 0 if it succeeds, nonzero if it doesn't. (See regex.h for + the return codes and their meanings.) */ + +int +regcomp (preg, pattern, cflags) + regex_t *preg; + const char *pattern; + int cflags; +{ + reg_errcode_t ret; + reg_syntax_t syntax + = (cflags & REG_EXTENDED) ? + RE_SYNTAX_POSIX_EXTENDED : RE_SYNTAX_POSIX_BASIC; + + /* regex_compile will allocate the space for the compiled pattern. */ + preg->buffer = 0; + preg->allocated = 0; + preg->used = 0; + + /* Try to allocate space for the fastmap. */ + preg->fastmap = (char *) malloc (1 << BYTEWIDTH); + + if (cflags & REG_ICASE) + { + unsigned i; + + preg->translate + = (RE_TRANSLATE_TYPE) malloc (CHAR_SET_SIZE + * sizeof (*(RE_TRANSLATE_TYPE)0)); + if (preg->translate == NULL) + return (int) REG_ESPACE; + + /* Map uppercase characters to corresponding lowercase ones. */ + for (i = 0; i < CHAR_SET_SIZE; i++) + preg->translate[i] = ISUPPER (i) ? TOLOWER (i) : i; + } + else + preg->translate = NULL; + + /* If REG_NEWLINE is set, newlines are treated differently. */ + if (cflags & REG_NEWLINE) + { /* REG_NEWLINE implies neither . nor [^...] match newline. */ + syntax &= ~RE_DOT_NEWLINE; + syntax |= RE_HAT_LISTS_NOT_NEWLINE; + /* It also changes the matching behavior. */ + preg->newline_anchor = 1; + } + else + preg->newline_anchor = 0; + + preg->no_sub = !!(cflags & REG_NOSUB); + + /* POSIX says a null character in the pattern terminates it, so we + can use strlen here in compiling the pattern. */ +# ifdef MBS_SUPPORT + if (MB_CUR_MAX != 1) + ret = wcs_regex_compile (pattern, strlen (pattern), syntax, preg); + else +# endif + ret = byte_regex_compile (pattern, strlen (pattern), syntax, preg); + + /* POSIX doesn't distinguish between an unmatched open-group and an + unmatched close-group: both are REG_EPAREN. */ + if (ret == REG_ERPAREN) ret = REG_EPAREN; + + if (ret == REG_NOERROR && preg->fastmap) + { + /* Compute the fastmap now, since regexec cannot modify the pattern + buffer. */ + if (re_compile_fastmap (preg) == -2) + { + /* Some error occurred while computing the fastmap, just forget + about it. */ + free (preg->fastmap); + preg->fastmap = NULL; + } + } + + return (int) ret; +} +#ifdef _LIBC +weak_alias (__regcomp, regcomp) +#endif + + +/* regexec searches for a given pattern, specified by PREG, in the + string STRING. + + If NMATCH is zero or REG_NOSUB was set in the cflags argument to + `regcomp', we ignore PMATCH. Otherwise, we assume PMATCH has at + least NMATCH elements, and we set them to the offsets of the + corresponding matched substrings. + + EFLAGS specifies `execution flags' which affect matching: if + REG_NOTBOL is set, then ^ does not match at the beginning of the + string; if REG_NOTEOL is set, then $ does not match at the end. + + We return 0 if we find a match and REG_NOMATCH if not. */ + +int +regexec (preg, string, nmatch, pmatch, eflags) + const regex_t *preg; + const char *string; + size_t nmatch; + regmatch_t pmatch[]; + int eflags; +{ + int ret; + struct re_registers regs; + regex_t private_preg; + int len = strlen (string); + boolean want_reg_info = !preg->no_sub && nmatch > 0; + + private_preg = *preg; + + private_preg.not_bol = !!(eflags & REG_NOTBOL); + private_preg.not_eol = !!(eflags & REG_NOTEOL); + + /* The user has told us exactly how many registers to return + information about, via `nmatch'. We have to pass that on to the + matching routines. */ + private_preg.regs_allocated = REGS_FIXED; + + if (want_reg_info) + { + regs.num_regs = nmatch; + regs.start = TALLOC (nmatch * 2, regoff_t); + if (regs.start == NULL) + return (int) REG_NOMATCH; + regs.end = regs.start + nmatch; + } + + /* Perform the searching operation. */ + ret = re_search (&private_preg, string, len, + /* start: */ 0, /* range: */ len, + want_reg_info ? ®s : (struct re_registers *) 0); + + /* Copy the register information to the POSIX structure. */ + if (want_reg_info) + { + if (ret >= 0) + { + unsigned r; + + for (r = 0; r < nmatch; r++) + { + pmatch[r].rm_so = regs.start[r]; + pmatch[r].rm_eo = regs.end[r]; + } + } + + /* If we needed the temporary register info, free the space now. */ + free (regs.start); + } + + /* We want zero return to mean success, unlike `re_search'. */ + return ret >= 0 ? (int) REG_NOERROR : (int) REG_NOMATCH; +} +#ifdef _LIBC +weak_alias (__regexec, regexec) +#endif + + +/* Returns a message corresponding to an error code, ERRCODE, returned + from either regcomp or regexec. We don't use PREG here. */ + +size_t +regerror (errcode, preg, errbuf, errbuf_size) + int errcode; + const regex_t *preg; + char *errbuf; + size_t errbuf_size; +{ + const char *msg; + size_t msg_size; + + if (errcode < 0 + || errcode >= (int) (sizeof (re_error_msgid_idx) + / sizeof (re_error_msgid_idx[0]))) + /* Only error codes returned by the rest of the code should be passed + to this routine. If we are given anything else, or if other regex + code generates an invalid error code, then the program has a bug. + Dump core so we can fix it. */ + abort (); + + msg = gettext (re_error_msgid + re_error_msgid_idx[errcode]); + + msg_size = strlen (msg) + 1; /* Includes the null. */ + + if (errbuf_size != 0) + { + if (msg_size > errbuf_size) + { +#if defined HAVE_MEMPCPY || defined _LIBC + *((char *) __mempcpy (errbuf, msg, errbuf_size - 1)) = '\0'; +#else + memcpy (errbuf, msg, errbuf_size - 1); + errbuf[errbuf_size - 1] = 0; +#endif + } + else + memcpy (errbuf, msg, msg_size); + } + + return msg_size; +} +#ifdef _LIBC +weak_alias (__regerror, regerror) +#endif + + +/* Free dynamically allocated space used by PREG. */ + +void +regfree (preg) + regex_t *preg; +{ + if (preg->buffer != NULL) + free (preg->buffer); + preg->buffer = NULL; + + preg->allocated = 0; + preg->used = 0; + + if (preg->fastmap != NULL) + free (preg->fastmap); + preg->fastmap = NULL; + preg->fastmap_accurate = 0; + + if (preg->translate != NULL) + free (preg->translate); + preg->translate = NULL; +} +#ifdef _LIBC +weak_alias (__regfree, regfree) +#endif + +#endif /* not emacs */ + +#endif /* not INSIDE_RECURSION */ + + +#undef STORE_NUMBER +#undef STORE_NUMBER_AND_INCR +#undef EXTRACT_NUMBER +#undef EXTRACT_NUMBER_AND_INCR + +#undef DEBUG_PRINT_COMPILED_PATTERN +#undef DEBUG_PRINT_DOUBLE_STRING + +#undef INIT_FAIL_STACK +#undef RESET_FAIL_STACK +#undef DOUBLE_FAIL_STACK +#undef PUSH_PATTERN_OP +#undef PUSH_FAILURE_POINTER +#undef PUSH_FAILURE_INT +#undef PUSH_FAILURE_ELT +#undef POP_FAILURE_POINTER +#undef POP_FAILURE_INT +#undef POP_FAILURE_ELT +#undef DEBUG_PUSH +#undef DEBUG_POP +#undef PUSH_FAILURE_POINT +#undef POP_FAILURE_POINT + +#undef REG_UNSET_VALUE +#undef REG_UNSET + +#undef PATFETCH +#undef PATFETCH_RAW +#undef PATUNFETCH +#undef TRANSLATE + +#undef INIT_BUF_SIZE +#undef GET_BUFFER_SPACE +#undef BUF_PUSH +#undef BUF_PUSH_2 +#undef BUF_PUSH_3 +#undef STORE_JUMP +#undef STORE_JUMP2 +#undef INSERT_JUMP +#undef INSERT_JUMP2 +#undef EXTEND_BUFFER +#undef GET_UNSIGNED_NUMBER +#undef FREE_STACK_RETURN + +# undef POINTER_TO_OFFSET +# undef MATCHING_IN_FRST_STRING +# undef PREFETCH +# undef AT_STRINGS_BEG +# undef AT_STRINGS_END +# undef WORDCHAR_P +# undef FREE_VAR +# undef FREE_VARIABLES +# undef NO_HIGHEST_ACTIVE_REG +# undef NO_LOWEST_ACTIVE_REG + +# undef CHAR_T +# undef UCHAR_T +# undef COMPILED_BUFFER_VAR +# undef OFFSET_ADDRESS_SIZE +# undef CHAR_CLASS_SIZE +# undef PREFIX +# undef ARG_PREFIX +# undef PUT_CHAR +# undef BYTE +# undef WCHAR + +# define DEFINED_ONCE -- cgit v1.2.3