diff options
Diffstat (limited to 'extra')
| -rwxr-xr-x | extra/scripts/install_headers.sh | 4 | ||||
| -rw-r--r-- | extra/scripts/unifdef.c | 1235 | ||||
| -rw-r--r-- | extra/scripts/unifdef.h | 56 | ||||
| -rw-r--r-- | extra/scripts/version.h | 2 |
4 files changed, 927 insertions, 370 deletions
diff --git a/extra/scripts/install_headers.sh b/extra/scripts/install_headers.sh index 14d64dc9d..5a966066d 100755 --- a/extra/scripts/install_headers.sh +++ b/extra/scripts/install_headers.sh @@ -32,7 +32,6 @@ if ! test -x "$top_builddir/extra/scripts/unifdef"; then exit 1 fi - # Sanitize and copy uclibc headers ( # We must cd, or else we'll prepend "${srcdir}" to filenames! @@ -56,6 +55,9 @@ while read -r filename; do # Do not abort the script if unifdef "fails"! # NB2: careful with sed command arguments, they contain tab character "$top_builddir/extra/scripts/unifdef" \ + -B \ + -t \ + -f "$top_builddir/include/generated/unifdef_config.h" \ -U_LIBC \ -U__UCLIBC_GEN_LOCALE \ -U__NO_CTYPE \ diff --git a/extra/scripts/unifdef.c b/extra/scripts/unifdef.c index abc39966c..b159df0a6 100644 --- a/extra/scripts/unifdef.c +++ b/extra/scripts/unifdef.c @@ -1,13 +1,5 @@ /* - * Copyright (c) 2002 - 2005 Tony Finch <dot@dotat.at>. All rights reserved. - * - * This code is derived from software contributed to Berkeley by Dave Yost. - * It was rewritten to support ANSI C by Tony Finch. The original version of - * unifdef carried the following copyright notice. None of its code remains - * in this version (though some of the names remain). - * - * Copyright (c) 1985, 1993 - * The Regents of the University of California. All rights reserved. + * Copyright (c) 2002 - 2013 Tony Finch <dot@dotat.at> * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -31,27 +23,15 @@ * SUCH DAMAGE. */ -#include <sys/cdefs.h> - -#ifndef lint -#if 0 -static const char copyright[] = -"@(#) Copyright (c) 1985, 1993\n\ - The Regents of the University of California. All rights reserved.\n"; -#endif -#ifdef __IDSTRING -__IDSTRING(Berkeley, "@(#)unifdef.c 8.1 (Berkeley) 6/6/93"); -__IDSTRING(NetBSD, "$NetBSD: unifdef.c,v 1.8 2000/07/03 02:51:36 matt Exp $"); -__IDSTRING(dotat, "$dotat: things/unifdef.c,v 1.171 2005/03/08 12:38:48 fanf2 Exp $"); -#endif -#endif /* not lint */ -#ifdef __FBSDID -__FBSDID("$FreeBSD: /repoman/r/ncvs/src/usr.bin/unifdef/unifdef.c,v 1.20 2005/05/21 09:55:09 ru Exp $"); -#endif - /* * unifdef - remove ifdef'ed lines * + * This code was derived from software contributed to Berkeley by Dave Yost. + * It was rewritten to support ANSI C by Tony Finch. The original version + * of unifdef carried the 4-clause BSD copyright licence. None of its code + * remains in this version (though some of the names remain) so it now + * carries a more liberal licence. + * * Wishlist: * provide an option which will append the name of the * appropriate symbol after #else's and #endif's @@ -59,26 +39,17 @@ __FBSDID("$FreeBSD: /repoman/r/ncvs/src/usr.bin/unifdef/unifdef.c,v 1.20 2005/05 * #else's and #endif's to see that they match their * corresponding #ifdef or #ifndef * - * The first two items above require better buffer handling, which would - * also make it possible to handle all "dodgy" directives correctly. + * These require better buffer handling, which would also make + * it possible to handle all "dodgy" directives correctly. */ -#include <errno.h> -#include <ctype.h> -#include <stdarg.h> -#include <stdbool.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> - -/* Avoid err.h since uClibc can disable these things */ -#define vwarnx(fmt, args) ({ fprintf(stderr, "unifdef: "); vfprintf(stderr, fmt, args); fprintf(stderr, "\n"); }) -#define warnx(fmt, args...) fprintf(stderr, "unifdef: " fmt "\n", ## args) -#define errx(exit_code, fmt, args...) ({ warnx(fmt, ## args); exit(exit_code); }) -#define err(exit_code, fmt, args...) errx(exit_code, fmt ": %s", ## args, strerror(errno)) +#include "unifdef.h" -size_t strlcpy(char *dst, const char *src, size_t siz); +static const char copyright[] = + #include "version.h" + "@(#) $Author: Tony Finch (dot@dotat.at) $\n" + "@(#) $URL: http://dotat.at/prog/unifdef $\n" +; /* types of input lines: */ typedef enum { @@ -96,6 +67,7 @@ typedef enum { LT_DODGY_LAST = LT_DODGY + LT_ENDIF, LT_PLAIN, /* ordinary line */ LT_EOF, /* end of file */ + LT_ERROR, /* unevaluable #if */ LT_COUNT } Linetype; @@ -106,9 +78,12 @@ static char const * const linetype_name[] = { "DODGY IF", "DODGY TRUE", "DODGY FALSE", "DODGY ELIF", "DODGY ELTRUE", "DODGY ELFALSE", "DODGY ELSE", "DODGY ENDIF", - "PLAIN", "EOF" + "PLAIN", "EOF", "ERROR" }; +#define linetype_if2elif(lt) ((Linetype)(lt - LT_IF + LT_ELIF)) +#define linetype_2dodgy(lt) ((Linetype)(lt + LT_DODGY)) + /* state of #if processing */ typedef enum { IS_OUTSIDE, @@ -162,7 +137,7 @@ static char const * const linestate_name[] = { */ #define MAXDEPTH 64 /* maximum #if nesting */ #define MAXLINE 4096 /* maximum length of line */ -#define MAXSYMS 4096 /* maximum number of symbols */ +#define MAXSYMS 16384 /* maximum number of symbols */ /* * Sometimes when editing a keyword the replacement text is longer, so @@ -174,13 +149,17 @@ static char const * const linestate_name[] = { * Globals. */ +static bool compblank; /* -B: compress blank lines */ +static bool lnblank; /* -b: blank deleted lines */ static bool complement; /* -c: do the complement */ static bool debugging; /* -d: debugging reports */ +static bool inplace; /* -m: modify in place */ static bool iocccok; /* -e: fewer IOCCC errors */ +static bool strictlogic; /* -K: keep ambiguous #ifs */ static bool killconsts; /* -k: eval constant #ifs */ -static bool lnblank; /* -l: blank deleted lines */ static bool lnnum; /* -n: add #line directives */ static bool symlist; /* -s: output symbol list */ +static bool symdepth; /* -S: output symbol depth */ static bool text; /* -t: this is a text file */ static const char *symname[MAXSYMS]; /* symbol name */ @@ -191,10 +170,28 @@ static int nsyms; /* number of symbols */ static FILE *input; /* input file pointer */ static const char *filename; /* input file name */ static int linenum; /* current line number */ +static const char *linefile; /* file name for #line */ +static FILE *output; /* output file pointer */ +static const char *ofilename; /* output file name */ +static const char *backext; /* backup extension */ +static char *tempname; /* avoid splatting input */ static char tline[MAXLINE+EDITSLOP];/* input buffer plus space */ static char *keyword; /* used for editing #elif's */ +/* + * When processing a file, the output's newline style will match the + * input's, and unifdef correctly handles CRLF or LF endings whatever + * the platform's native style. The stdio streams are opened in binary + * mode to accommodate platforms whose native newline style is CRLF. + * When the output isn't a processed input file (when it is error / + * debug / diagnostic messages) then unifdef uses native line endings. + */ + +static const char *newline; /* input file format */ +static const char newline_unix[] = "\n"; +static const char newline_crlf[] = "\r\n"; + static Comment_state incomment; /* comment parser state */ static Line_state linestate; /* #if line parser state */ static Ifstate ifstate[MAXDEPTH]; /* #if processor state */ @@ -202,31 +199,52 @@ static bool ignoring[MAXDEPTH]; /* ignore comments state */ static int stifline[MAXDEPTH]; /* start of current #if */ static int depth; /* current #if nesting */ static int delcount; /* count of deleted lines */ -static bool keepthis; /* don't delete constant #if */ +static unsigned blankcount; /* count of blank lines */ +static unsigned blankmax; /* maximum recent blankcount */ +static bool constexpr; /* constant #if expression */ +static bool zerosyms; /* to format symdepth output */ +static bool firstsym; /* ditto */ +static int exitmode; /* exit status mode */ static int exitstat; /* program exit status */ -static void addsym(bool, bool, char *); +static void addsym1(bool, bool, char *); +static void addsym2(bool, const char *, const char *); +static char *astrcat(const char *, const char *); +static void cleantemp(void); +static void closeio(void); static void debug(const char *, ...); +static void debugsym(const char *, int); +static bool defundef(void); +static void defundefile(const char *); static void done(void); static void error(const char *); -static int findsym(const char *); +static int findsym(const char **); static void flushline(bool); -static Linetype get_line(void); +static void hashline(void); +static void help(void); static Linetype ifeval(const char **); static void ignoreoff(void); static void ignoreon(void); +static void indirectsym(void); static void keywordedit(const char *); +static const char *matchsym(const char *, const char *); static void nest(void); +static Linetype parseline(void); static void process(void); +static void processinout(const char *, const char *); +static const char *skipargs(const char *); static const char *skipcomment(const char *); +static const char *skiphash(void); +static const char *skipline(const char *); static const char *skipsym(const char *); static void state(Ifstate); -static int strlcmp(const char *, const char *, size_t); static void unnest(void); static void usage(void); +static void version(void); +static const char *xstrdup(const char *, const char *); -#define endsym(c) (!isalpha((unsigned char)c) && !isdigit((unsigned char)c) && c != '_') +#define endsym(c) (!isalnum((unsigned char)c) && c != '_') /* * The main program. @@ -236,7 +254,7 @@ main(int argc, char *argv[]) { int opt; - while ((opt = getopt(argc, argv, "i:D:U:I:cdeklnst")) != -1) + while ((opt = getopt(argc, argv, "i:D:U:f:I:M:o:x:bBcdehKklmnsStV")) != -1) switch (opt) { case 'i': /* treat stuff controlled by these symbols as text */ /* @@ -246,20 +264,26 @@ main(int argc, char *argv[]) */ opt = *optarg++; if (opt == 'D') - addsym(true, true, optarg); + addsym1(true, true, optarg); else if (opt == 'U') - addsym(true, false, optarg); + addsym1(true, false, optarg); else usage(); break; case 'D': /* define a symbol */ - addsym(false, true, optarg); + addsym1(false, true, optarg); break; case 'U': /* undef a symbol */ - addsym(false, false, optarg); + addsym1(false, false, optarg); break; - case 'I': - /* no-op for compatibility with cpp */ + case 'I': /* no-op for compatibility with cpp */ + break; + case 'b': /* blank deleted lines instead of omitting them */ + case 'l': /* backwards compatibility */ + lnblank = true; + break; + case 'B': /* compress blank lines around removed section */ + compblank = true; break; case 'c': /* treat -D as -U and vice versa */ complement = true; @@ -270,50 +294,210 @@ main(int argc, char *argv[]) case 'e': /* fewer errors from dodgy lines */ iocccok = true; break; + case 'f': /* definitions file */ + defundefile(optarg); + break; + case 'h': + help(); + break; + case 'K': /* keep ambiguous #ifs */ + strictlogic = true; + break; case 'k': /* process constant #ifs */ killconsts = true; break; - case 'l': /* blank deleted lines instead of omitting them */ - lnblank = true; + case 'm': /* modify in place */ + inplace = true; + break; + case 'M': /* modify in place and keep backup */ + inplace = true; + backext = optarg; break; case 'n': /* add #line directive after deleted lines */ lnnum = true; break; + case 'o': /* output to a file */ + ofilename = optarg; + break; case 's': /* only output list of symbols that control #ifs */ symlist = true; break; + case 'S': /* list symbols with their nesting depth */ + symlist = symdepth = true; + break; case 't': /* don't parse C comments */ text = true; break; + case 'V': + version(); + break; + case 'x': + exitmode = atoi(optarg); + if(exitmode < 0 || exitmode > 2) + usage(); + break; default: usage(); } argc -= optind; argv += optind; - if (argc > 1) { - errx(2, "can only do one file"); - } else if (argc == 1 && strcmp(*argv, "-") != 0) { - filename = *argv; - input = fopen(filename, "r"); - if (input == NULL) - err(2, "can't open %s", filename); - } else { + if (compblank && lnblank) + errx(2, "-B and -b are mutually exclusive"); + if (symlist && (ofilename != NULL || inplace || argc > 1)) + errx(2, "-s only works with one input file"); + if (argc > 1 && ofilename != NULL) + errx(2, "-o cannot be used with multiple input files"); + if (argc > 1 && !inplace) + errx(2, "multiple input files require -m or -M"); + if (argc == 0) + argc = 1; + if (argc == 1 && !inplace && ofilename == NULL) + ofilename = "-"; + indirectsym(); + + atexit(cleantemp); + if (ofilename != NULL) + processinout(*argv, ofilename); + else while (argc-- > 0) { + processinout(*argv, *argv); + argv++; + } + switch(exitmode) { + case(0): exit(exitstat); + case(1): exit(!exitstat); + case(2): exit(0); + default: abort(); /* bug */ + } +} + +/* + * File logistics. + */ +static void +processinout(const char *ifn, const char *ofn) +{ + struct stat st; + + if (ifn == NULL || strcmp(ifn, "-") == 0) { filename = "[stdin]"; - input = stdin; + linefile = NULL; + input = fbinmode(stdin); + } else { + filename = ifn; + linefile = ifn; + input = fopen(ifn, "rb"); + if (input == NULL) + err(2, "can't open %s", ifn); + } + if (strcmp(ofn, "-") == 0) { + output = fbinmode(stdout); + process(); + return; + } + if (stat(ofn, &st) < 0) { + output = fopen(ofn, "wb"); + if (output == NULL) + err(2, "can't create %s", ofn); + process(); + return; } + + tempname = astrcat(ofn, ".XXXXXX"); + output = mktempmode(tempname, st.st_mode); + if (output == NULL) + err(2, "can't create %s", tempname); + process(); - debug("bug at line %d", __LINE__); - abort(); /* bug */ + + if (backext != NULL) { + char *backname = astrcat(ofn, backext); + if (rename(ofn, backname) < 0) + err(2, "can't rename \"%s\" to \"%s\"", ofn, backname); + free(backname); + } + if (replace(tempname, ofn) < 0) + err(2, "can't rename \"%s\" to \"%s\"", tempname, ofn); + free(tempname); + tempname = NULL; +} + +/* + * For cleaning up if there is an error. + */ +static void +cleantemp(void) +{ + if (tempname != NULL) + remove(tempname); +} + +/* + * Self-identification functions. + */ + +static void +version(void) +{ + const char *c = copyright; + for (;;) { + while (*++c != '$') + if (*c == '\0') + exit(0); + while (*++c != '$') + putc(*c, stderr); + putc('\n', stderr); + } +} + +static void +synopsis(FILE *fp) +{ + fprintf(fp, + "usage: unifdef [-bBcdehKkmnsStV] [-x{012}] [-Mext] [-opath] \\\n" + " [-[i]Dsym[=val]] [-[i]Usym] [-fpath] ... [file] ...\n"); } static void usage(void) { - fprintf(stderr, "usage: unifdef [-cdeklnst] [-Ipath]" - " [-Dsym[=val]] [-Usym] [-iDsym[=val]] [-iUsym] ... [file]\n"); + synopsis(stderr); exit(2); } +static void +help(void) +{ + synopsis(stdout); + printf( + " -Dsym=val define preprocessor symbol with given value\n" + " -Dsym define preprocessor symbol with value 1\n" + " -Usym preprocessor symbol is undefined\n" + " -iDsym=val \\ ignore C strings and comments\n" + " -iDsym ) in sections controlled by these\n" + " -iUsym / preprocessor symbols\n" + " -fpath file containing #define and #undef directives\n" + " -b blank lines instead of deleting them\n" + " -B compress blank lines around deleted section\n" + " -c complement (invert) keep vs. delete\n" + " -d debugging mode\n" + " -e ignore multiline preprocessor directives\n" + " -h print help\n" + " -Ipath extra include file path (ignored)\n" + " -K disable && and || short-circuiting\n" + " -k process constant #if expressions\n" + " -Mext modify in place and keep backups\n" + " -m modify input files in place\n" + " -n add #line directives to output\n" + " -opath output file name\n" + " -S list #if control symbols with nesting\n" + " -s list #if control symbols\n" + " -t ignore C strings and comments\n" + " -V print version\n" + " -x{012} exit status mode\n" + ); + exit(0); +} + /* * A state transition function alters the global #if processing state * in a particular way. The table below is indexed by the current @@ -327,7 +511,8 @@ usage(void) * When we have processed a group that starts off with a known-false * #if/#elif sequence (which has therefore been deleted) followed by a * #elif that we don't understand and therefore must keep, we edit the - * latter into a #if to keep the nesting correct. + * latter into a #if to keep the nesting correct. We use memcpy() to + * overwrite the 4 byte token "elif" with "if " without a '\0' byte. * * When we find a true #elif in a group, the following block will * always be kept and the rest of the sequence after the next #elif or @@ -380,75 +565,66 @@ static void Oelif (void) { if (!iocccok) Eioccc(); Pelif(); } static void Idrop (void) { Fdrop(); ignoreon(); } static void Itrue (void) { Ftrue(); ignoreon(); } static void Ifalse(void) { Ffalse(); ignoreon(); } -/* edit this line */ -static void Mpass (void) { strncpy(keyword, "if ", 4); Pelif(); } -static void Mtrue (void) { keywordedit("else\n"); state(IS_TRUE_MIDDLE); } -static void Melif (void) { keywordedit("endif\n"); state(IS_FALSE_TRAILER); } -static void Melse (void) { keywordedit("endif\n"); state(IS_FALSE_ELSE); } +/* modify this line */ +static void Mpass (void) { memcpy(keyword, "if ", 4); Pelif(); } +static void Mtrue (void) { keywordedit("else"); state(IS_TRUE_MIDDLE); } +static void Melif (void) { keywordedit("endif"); state(IS_FALSE_TRAILER); } +static void Melse (void) { keywordedit("endif"); state(IS_FALSE_ELSE); } static state_fn * const trans_table[IS_COUNT][LT_COUNT] = { /* IS_OUTSIDE */ { Itrue, Ifalse,Fpass, Ftrue, Ffalse,Eelif, Eelif, Eelif, Eelse, Eendif, Oiffy, Oiffy, Fpass, Oif, Oif, Eelif, Eelif, Eelif, Eelse, Eendif, - print, done }, + print, done, abort }, /* IS_FALSE_PREFIX */ { Idrop, Idrop, Fdrop, Fdrop, Fdrop, Mpass, Strue, Sfalse,Selse, Dendif, Idrop, Idrop, Fdrop, Fdrop, Fdrop, Mpass, Eioccc,Eioccc,Eioccc,Eioccc, - drop, Eeof }, + drop, Eeof, abort }, /* IS_TRUE_PREFIX */ { Itrue, Ifalse,Fpass, Ftrue, Ffalse,Dfalse,Dfalse,Dfalse,Delse, Dendif, Oiffy, Oiffy, Fpass, Oif, Oif, Eioccc,Eioccc,Eioccc,Eioccc,Eioccc, - print, Eeof }, + print, Eeof, abort }, /* IS_PASS_MIDDLE */ { Itrue, Ifalse,Fpass, Ftrue, Ffalse,Pelif, Mtrue, Delif, Pelse, Pendif, Oiffy, Oiffy, Fpass, Oif, Oif, Pelif, Oelif, Oelif, Pelse, Pendif, - print, Eeof }, + print, Eeof, abort }, /* IS_FALSE_MIDDLE */ { Idrop, Idrop, Fdrop, Fdrop, Fdrop, Pelif, Mtrue, Delif, Pelse, Pendif, Idrop, Idrop, Fdrop, Fdrop, Fdrop, Eioccc,Eioccc,Eioccc,Eioccc,Eioccc, - drop, Eeof }, + drop, Eeof, abort }, /* IS_TRUE_MIDDLE */ { Itrue, Ifalse,Fpass, Ftrue, Ffalse,Melif, Melif, Melif, Melse, Pendif, Oiffy, Oiffy, Fpass, Oif, Oif, Eioccc,Eioccc,Eioccc,Eioccc,Pendif, - print, Eeof }, + print, Eeof, abort }, /* IS_PASS_ELSE */ { Itrue, Ifalse,Fpass, Ftrue, Ffalse,Eelif, Eelif, Eelif, Eelse, Pendif, Oiffy, Oiffy, Fpass, Oif, Oif, Eelif, Eelif, Eelif, Eelse, Pendif, - print, Eeof }, + print, Eeof, abort }, /* IS_FALSE_ELSE */ { Idrop, Idrop, Fdrop, Fdrop, Fdrop, Eelif, Eelif, Eelif, Eelse, Dendif, Idrop, Idrop, Fdrop, Fdrop, Fdrop, Eelif, Eelif, Eelif, Eelse, Eioccc, - drop, Eeof }, + drop, Eeof, abort }, /* IS_TRUE_ELSE */ { Itrue, Ifalse,Fpass, Ftrue, Ffalse,Eelif, Eelif, Eelif, Eelse, Dendif, Oiffy, Oiffy, Fpass, Oif, Oif, Eelif, Eelif, Eelif, Eelse, Eioccc, - print, Eeof }, + print, Eeof, abort }, /* IS_FALSE_TRAILER */ { Idrop, Idrop, Fdrop, Fdrop, Fdrop, Dfalse,Dfalse,Dfalse,Delse, Dendif, Idrop, Idrop, Fdrop, Fdrop, Fdrop, Dfalse,Dfalse,Dfalse,Delse, Eioccc, - drop, Eeof } + drop, Eeof, abort } /*TRUEI FALSEI IF TRUE FALSE ELIF ELTRUE ELFALSE ELSE ENDIF TRUEI FALSEI IF TRUE FALSE ELIF ELTRUE ELFALSE ELSE ENDIF (DODGY) - PLAIN EOF */ + PLAIN EOF ERROR */ }; /* * State machine utility functions */ static void -done(void) -{ - if (incomment) - error("EOF in comment"); - exit(exitstat); -} -static void ignoreoff(void) { - if (depth == 0) { - debug("bug at line %d", __LINE__); + if (depth == 0) abort(); /* bug */ - } ignoring[depth] = ignoring[depth-1]; } static void @@ -459,31 +635,25 @@ ignoreon(void) static void keywordedit(const char *replacement) { - size_t size = tline + sizeof(tline) - keyword; - char *dst = keyword; - const char *src = replacement; - if (size != 0) { - while ((--size != 0) && (*src != '\0')) - *dst++ = *src++; - *dst = '\0'; - } + snprintf(keyword, tline + sizeof(tline) - keyword, + "%s%s", replacement, newline); print(); } static void nest(void) { - depth += 1; - if (depth >= MAXDEPTH) + if (depth > MAXDEPTH-1) + abort(); /* bug */ + if (depth == MAXDEPTH-1) error("Too many levels of nesting"); + depth += 1; stifline[depth] = linenum; } static void unnest(void) { - if (depth == 0) { - debug("bug at line %d", __LINE__); + if (depth == 0) abort(); /* bug */ - } depth -= 1; } static void @@ -493,7 +663,20 @@ state(Ifstate is) } /* + * The last state transition function. When this is called, + * lineval == LT_EOF, so the process() loop will terminate. + */ +static void +done(void) +{ + if (incomment) + error("EOF in comment"); + closeio(); +} + +/* * Write a line to the output or not, according to command line options. + * If writing fails, closeio() will print the error and exit. */ static void flushline(bool keep) @@ -501,16 +684,58 @@ flushline(bool keep) if (symlist) return; if (keep ^ complement) { - if (lnnum && delcount > 0) - printf("#line %d\n", linenum); - fputs(tline, stdout); - delcount = 0; + bool blankline = tline[strspn(tline, " \t\r\n")] == '\0'; + if (blankline && compblank && blankcount != blankmax) { + delcount += 1; + blankcount += 1; + } else { + if (lnnum && delcount > 0) + hashline(); + if (fputs(tline, output) == EOF) + closeio(); + delcount = 0; + blankmax = blankcount = blankline ? blankcount + 1 : 0; + } } else { - if (lnblank) - putc('\n', stdout); + if (lnblank && fputs(newline, output) == EOF) + closeio(); exitstat = 1; delcount += 1; + blankcount = 0; } + if (debugging && fflush(output) == EOF) + closeio(); +} + +/* + * Format of #line directives depends on whether we know the input filename. + */ +static void +hashline(void) +{ + int e; + + if (linefile == NULL) + e = fprintf(output, "#line %d%s", linenum, newline); + else + e = fprintf(output, "#line %d \"%s\"%s", + linenum, linefile, newline); + if (e < 0) + closeio(); +} + +/* + * Flush the output and handle errors. + */ +static void +closeio(void) +{ + /* Tidy up after findsym(). */ + if (symdepth && !zerosyms) + printf("\n"); + if (output != NULL && (ferror(output) || fclose(output) == EOF)) + err(2, "%s: can't write to output", filename); + fclose(input); } /* @@ -519,14 +744,18 @@ flushline(bool keep) static void process(void) { - Linetype lineval; - - for (;;) { - linenum++; - lineval = get_line(); + Linetype lineval = LT_PLAIN; + /* When compressing blank lines, act as if the file + is preceded by a large number of blank lines. */ + blankmax = blankcount = 1000; + zerosyms = true; + newline = NULL; + linenum = 0; + while (lineval != LT_EOF) { + lineval = parseline(); trans_table[ifstate[depth]][lineval](); - debug("process %s -> %s depth %d", - linetype_name[lineval], + debug("process line %d %s -> %s depth %d", + linenum, linetype_name[lineval], ifstate_name[ifstate[depth]], depth); } } @@ -537,104 +766,131 @@ process(void) * help from skipcomment(). */ static Linetype -get_line(void) +parseline(void) { const char *cp; int cursym; - int kwlen; Linetype retval; Comment_state wascomment; - if (fgets(tline, MAXLINE, input) == NULL) - return (LT_EOF); - retval = LT_PLAIN; wascomment = incomment; - cp = skipcomment(tline); - if (linestate == LS_START) { - if (*cp == '#') { - linestate = LS_HASH; - cp = skipcomment(cp + 1); - } else if (*cp != '\0') - linestate = LS_DIRTY; + cp = skiphash(); + if (cp == NULL) + return (LT_EOF); + if (newline == NULL) { + if (strrchr(tline, '\n') == strrchr(tline, '\r') + 1) + newline = newline_crlf; + else + newline = newline_unix; } - if (!incomment && linestate == LS_HASH) { - keyword = tline + (cp - tline); - cp = skipsym(cp); - kwlen = cp - keyword; - /* no way can we deal with a continuation inside a keyword */ - if (strncmp(cp, "\\\n", 2) == 0) - Eioccc(); - if (strlcmp("ifdef", keyword, kwlen) == 0 || - strlcmp("ifndef", keyword, kwlen) == 0) { - cp = skipcomment(cp); - if ((cursym = findsym(cp)) < 0) - retval = LT_IF; - else { - retval = (keyword[2] == 'n') - ? LT_FALSE : LT_TRUE; - if (value[cursym] == NULL) - retval = (retval == LT_TRUE) - ? LT_FALSE : LT_TRUE; - if (ignore[cursym]) - retval = (retval == LT_TRUE) - ? LT_TRUEI : LT_FALSEI; - } - cp = skipsym(cp); - } else if (strlcmp("if", keyword, kwlen) == 0) - retval = ifeval(&cp); - else if (strlcmp("elif", keyword, kwlen) == 0) - retval = ifeval(&cp) - LT_IF + LT_ELIF; - else if (strlcmp("else", keyword, kwlen) == 0) - retval = LT_ELSE; - else if (strlcmp("endif", keyword, kwlen) == 0) - retval = LT_ENDIF; + if (*cp == '\0') { + retval = LT_PLAIN; + goto done; + } + keyword = tline + (cp - tline); + if ((cp = matchsym("ifdef", keyword)) != NULL || + (cp = matchsym("ifndef", keyword)) != NULL) { + cp = skipcomment(cp); + if ((cursym = findsym(&cp)) < 0) + retval = LT_IF; else { - linestate = LS_DIRTY; - retval = LT_PLAIN; + retval = (keyword[2] == 'n') + ? LT_FALSE : LT_TRUE; + if (value[cursym] == NULL) + retval = (retval == LT_TRUE) + ? LT_FALSE : LT_TRUE; + if (ignore[cursym]) + retval = (retval == LT_TRUE) + ? LT_TRUEI : LT_FALSEI; } - cp = skipcomment(cp); - if (*cp != '\0') { + } else if ((cp = matchsym("if", keyword)) != NULL) + retval = ifeval(&cp); + else if ((cp = matchsym("elif", keyword)) != NULL) + retval = linetype_if2elif(ifeval(&cp)); + else if ((cp = matchsym("else", keyword)) != NULL) + retval = LT_ELSE; + else if ((cp = matchsym("endif", keyword)) != NULL) + retval = LT_ENDIF; + else { + cp = skipsym(keyword); + /* no way can we deal with a continuation inside a keyword */ + if (strncmp(cp, "\\\r\n", 3) == 0 || + strncmp(cp, "\\\n", 2) == 0) + Eioccc(); + cp = skipline(cp); + retval = LT_PLAIN; + goto done; + } + cp = skipcomment(cp); + if (*cp != '\0') { + cp = skipline(cp); + if (retval == LT_TRUE || retval == LT_FALSE || + retval == LT_TRUEI || retval == LT_FALSEI) + retval = LT_IF; + if (retval == LT_ELTRUE || retval == LT_ELFALSE) + retval = LT_ELIF; + } + /* the following can happen if the last line of the file lacks a + newline or if there is too much whitespace in a directive */ + if (linestate == LS_HASH) { + long len = cp - tline; + if (fgets(tline + len, MAXLINE - len, input) == NULL) { + if (ferror(input)) + err(2, "can't read %s", filename); + /* append the missing newline at eof */ + strcpy(tline + len, newline); + cp += strlen(newline); + linestate = LS_START; + } else { linestate = LS_DIRTY; - if (retval == LT_TRUE || retval == LT_FALSE || - retval == LT_TRUEI || retval == LT_FALSEI) - retval = LT_IF; - if (retval == LT_ELTRUE || retval == LT_ELFALSE) - retval = LT_ELIF; - } - if (retval != LT_PLAIN && (wascomment || incomment)) { - retval += LT_DODGY; - if (incomment) - linestate = LS_DIRTY; } - /* skipcomment should have changed the state */ -// Hmm hppens sometimes on valid files -// if (linestate == LS_HASH) { -// debug("bug at line %d", __LINE__); -// abort(); /* bug */ -// } } - if (linestate == LS_DIRTY) { - while (*cp != '\0') - cp = skipcomment(cp + 1); + if (retval != LT_PLAIN && (wascomment || linestate != LS_START)) { + retval = linetype_2dodgy(retval); + linestate = LS_DIRTY; } - debug("parser %s comment %s line", +done: + debug("parser line %d state %s comment %s line", linenum, comment_name[incomment], linestate_name[linestate]); return (retval); } /* * These are the binary operators that are supported by the expression - * evaluator. Note that if support for division is added then we also - * need short-circuiting booleans because of divide-by-zero. + * evaluator. */ -static int op_lt(int a, int b) { return (a < b); } -static int op_gt(int a, int b) { return (a > b); } -static int op_le(int a, int b) { return (a <= b); } -static int op_ge(int a, int b) { return (a >= b); } -static int op_eq(int a, int b) { return (a == b); } -static int op_ne(int a, int b) { return (a != b); } -static int op_or(int a, int b) { return (a || b); } -static int op_and(int a, int b) { return (a && b); } +static Linetype op_strict(long *p, long v, Linetype at, Linetype bt) { + if(at == LT_IF || bt == LT_IF) return (LT_IF); + return (*p = v, v ? LT_TRUE : LT_FALSE); +} +static Linetype op_lt(long *p, Linetype at, long a, Linetype bt, long b) { + return op_strict(p, a < b, at, bt); +} +static Linetype op_gt(long *p, Linetype at, long a, Linetype bt, long b) { + return op_strict(p, a > b, at, bt); +} +static Linetype op_le(long *p, Linetype at, long a, Linetype bt, long b) { + return op_strict(p, a <= b, at, bt); +} +static Linetype op_ge(long *p, Linetype at, long a, Linetype bt, long b) { + return op_strict(p, a >= b, at, bt); +} +static Linetype op_eq(long *p, Linetype at, long a, Linetype bt, long b) { + return op_strict(p, a == b, at, bt); +} +static Linetype op_ne(long *p, Linetype at, long a, Linetype bt, long b) { + return op_strict(p, a != b, at, bt); +} +static Linetype op_or(long *p, Linetype at, long a, Linetype bt, long b) { + if (!strictlogic && (at == LT_TRUE || bt == LT_TRUE)) + return (*p = 1, LT_TRUE); + return op_strict(p, a || b, at, bt); +} +static Linetype op_and(long *p, Linetype at, long a, Linetype bt, long b) { + if (!strictlogic && (at == LT_FALSE || bt == LT_FALSE)) + return (*p = 0, LT_FALSE); + return op_strict(p, a && b, at, bt); +} /* * An evaluation function takes three arguments, as follows: (1) a pointer to @@ -643,12 +899,12 @@ static int op_and(int a, int b) { return (a && b); } * value of the expression; and (3) a pointer to a char* that points to the * expression to be evaluated and that is updated to the end of the expression * when evaluation is complete. The function returns LT_FALSE if the value of - * the expression is zero, LT_TRUE if it is non-zero, or LT_IF if the - * expression could not be evaluated. + * the expression is zero, LT_TRUE if it is non-zero, LT_IF if the expression + * depends on an unknown symbol, or LT_ERROR if there is a parse failure. */ struct ops; -typedef Linetype eval_fn(const struct ops *, int *, const char **); +typedef Linetype eval_fn(const struct ops *, long *, const char **); static eval_fn eval_table, eval_unary; @@ -659,139 +915,139 @@ static eval_fn eval_table, eval_unary; * element of the table. Innermost expressions have special non-table-driven * handling. */ -static const struct ops { +struct op { + const char *str; + Linetype (*fn)(long *, Linetype, long, Linetype, long); +}; +struct ops { eval_fn *inner; - struct op { - const char *str; - int short_circuit_val; - int (*fn)(int, int); - } op[5]; -} eval_ops[] = { - { eval_table, { { "||", 1, op_or } } }, - { eval_table, { { "&&", 0, op_and } } }, - { eval_table, { { "==", -1, op_eq }, - { "!=", -1, op_ne } } }, - { eval_unary, { { "<=", -1, op_le }, - { ">=", -1, op_ge }, - { "<", -1, op_lt }, - { ">", -1, op_gt } } } + struct op op[5]; }; +static const struct ops eval_ops[] = { + { eval_table, { { "||", op_or } } }, + { eval_table, { { "&&", op_and } } }, + { eval_table, { { "==", op_eq }, + { "!=", op_ne } } }, + { eval_unary, { { "<=", op_le }, + { ">=", op_ge }, + { "<", op_lt }, + { ">", op_gt } } } +}; + +/* Current operator precedence level */ +static long prec(const struct ops *ops) +{ + return (ops - eval_ops); +} /* - * Function for evaluating the innermost parts of expressions, viz. - * "!expr", "(expr)", "defined(symbol)", "defined symbol", "symbol", "number". - * We reset the keepthis flag when we find a non-constant subexpression. + * Function for evaluating the innermost parts of expressions, + * viz. !expr (expr) number defined(symbol) symbol + * We reset the constexpr flag in the last two cases. */ -// TODO: we use LT_IF both as "I don't know whether it's false or true" -// (example: "#if defined FOO") and when we see syntax error -// (example: "#if (1 || 2" - no closing paren!), but this is wrong. -// Binary && and || need to distinguish these cases in order to handle this: -// "#if defined KNOWN_UNDEFINED && FOO" - discard -// "#if defined KNOWN_UNDEFINED && (syntax_error_here" - do not discard! static Linetype -eval_unary(const struct ops *ops, int *valp, const char **cpp) +eval_unary(const struct ops *ops, long *valp, const char **cpp) { const char *cp; char *ep; int sym; + bool defparen; + Linetype lt; cp = skipcomment(*cpp); if (*cp == '!') { - debug("eval%d !", ops - eval_ops); + debug("eval%d !", prec(ops)); cp++; - if (eval_unary(ops, valp, &cp) == LT_IF) { - *cpp = cp; - return (LT_IF); + lt = eval_unary(ops, valp, &cp); + if (lt == LT_ERROR) + return (LT_ERROR); + if (lt != LT_IF) { + *valp = !*valp; + lt = *valp ? LT_TRUE : LT_FALSE; } - *valp = !*valp; - } else if (*cp == '(') { - Linetype expr_res; - cp++; - debug("eval%d (%s", ops - eval_ops, cp); - expr_res = eval_table(eval_ops, valp, &cp); + debug("eval%d (", prec(ops)); + lt = eval_table(eval_ops, valp, &cp); + if (lt == LT_ERROR) + return (LT_ERROR); cp = skipcomment(cp); - *cpp = cp; if (*cp++ != ')') - return (LT_IF); - *cpp = cp; - if (expr_res == LT_IF) - return (LT_IF); - + return (LT_ERROR); } else if (isdigit((unsigned char)*cp)) { - debug("eval%d number", ops - eval_ops); + debug("eval%d number", prec(ops)); *valp = strtol(cp, &ep, 0); - cp = skipsym(cp); - - } else if (strncmp(cp, "defined", 7) == 0 && endsym(cp[7])) { - bool parens; - + if (ep == cp) + return (LT_ERROR); + lt = *valp ? LT_TRUE : LT_FALSE; + cp = ep; + } else if (matchsym("defined", cp) != NULL) { cp = skipcomment(cp+7); - debug("eval%d defined '%s'", ops - eval_ops, cp); - parens = (*cp == '('); - if (parens) + if (*cp == '(') { cp = skipcomment(cp+1); - sym = findsym(cp); - cp = skipsym(cp); + defparen = true; + } else { + defparen = false; + } + sym = findsym(&cp); cp = skipcomment(cp); - if (parens) { - if (*cp != ')') - return (LT_IF); - cp = skipcomment(cp+1); + if (defparen && *cp++ != ')') { + debug("eval%d defined missing ')'", prec(ops)); + return (LT_ERROR); } - *cpp = cp; if (sym < 0) { - debug("sym not found, returning LT_IF"); - return (LT_IF); + debug("eval%d defined unknown", prec(ops)); + lt = LT_IF; + } else { + debug("eval%d defined %s", prec(ops), symname[sym]); + *valp = (value[sym] != NULL); + lt = *valp ? LT_TRUE : LT_FALSE; } - *valp = (value[sym] != NULL); - keepthis = false; - + constexpr = false; } else if (!endsym(*cp)) { - debug("eval%d symbol", ops - eval_ops); - sym = findsym(cp); - cp = skipsym(cp); - *cpp = cp; - if (sym < 0) - return (LT_IF); - if (value[sym] == NULL) + debug("eval%d symbol", prec(ops)); + sym = findsym(&cp); + if (sym < 0) { + lt = LT_IF; + cp = skipargs(cp); + } else if (value[sym] == NULL) { *valp = 0; - else { + lt = LT_FALSE; + } else { *valp = strtol(value[sym], &ep, 0); if (*ep != '\0' || ep == value[sym]) - return (LT_IF); + return (LT_ERROR); + lt = *valp ? LT_TRUE : LT_FALSE; + cp = skipargs(cp); } - keepthis = false; - + constexpr = false; } else { - debug("eval%d bad expr", ops - eval_ops); - return (LT_IF); + debug("eval%d bad expr", prec(ops)); + return (LT_ERROR); } *cpp = cp; - debug("eval%d = %d", ops - eval_ops, *valp); - return (*valp ? LT_TRUE : LT_FALSE); + debug("eval%d = %d", prec(ops), *valp); + return (lt); } /* * Table-driven evaluation of binary operators. */ static Linetype -eval_table(const struct ops *ops, int *valp, const char **cpp) +eval_table(const struct ops *ops, long *valp, const char **cpp) { - Linetype left_side; const struct op *op; const char *cp; - int val; + long val; + Linetype lt, rt; - debug("eval%d '%s'", ops - eval_ops, *cpp); - left_side = ops->inner(ops+1, valp, cpp); + debug("eval%d", prec(ops)); cp = *cpp; - + lt = ops->inner(ops+1, valp, &cp); + if (lt == LT_ERROR) + return (LT_ERROR); for (;;) { - Linetype right_side; - cp = skipcomment(cp); for (op = ops->op; op->str != NULL; op++) if (strncmp(cp, op->str, strlen(op->str)) == 0) @@ -799,38 +1055,17 @@ eval_table(const struct ops *ops, int *valp, const char **cpp) if (op->str == NULL) break; cp += strlen(op->str); - debug("eval%d '%s'", ops - eval_ops, op->str); - right_side = ops->inner(ops+1, &val, &cp); - *cpp = cp; - - /* If short_circuit_val is 0 or 1, we can ignore - * right side if left size is known, and its value - * (i.e., *valp) is 0 or !0, respectively */ - if (left_side != LT_IF && op->short_circuit_val == !!*valp) { - debug("op->short_circuit_val:%d *valp:%d cp:'%s'", - op->short_circuit_val, *valp, cp); - *valp = !!*valp; - break; - } - /* Same for the right side */ - if (right_side != LT_IF && op->short_circuit_val == !!val) { - debug("op->short_circuit_val:%d val:%d cp:'%s'", - op->short_circuit_val, val, cp); - left_side = right_side; - *valp = !!val; - break; - } - - if (left_side == LT_IF || right_side == LT_IF) - return (LT_IF); - *valp = op->fn(*valp, val); - left_side = right_side; + debug("eval%d %s", prec(ops), op->str); + rt = ops->inner(ops+1, &val, &cp); + if (rt == LT_ERROR) + return (LT_ERROR); + lt = op->fn(valp, lt, *valp, rt, val); } - debug("eval%d = %d LT_IF:%d", ops - eval_ops, *valp, (left_side == LT_IF)); - if (left_side == LT_IF) - return (LT_IF); - return (*valp ? LT_TRUE : LT_FALSE); + *cpp = cp; + debug("eval%d = %d", prec(ops), *valp); + debug("eval%d lt = %s", prec(ops), linetype_name[lt]); + return (lt); } /* @@ -841,14 +1076,56 @@ eval_table(const struct ops *ops, int *valp, const char **cpp) static Linetype ifeval(const char **cpp) { - int ret; - int val; + Linetype ret; + long val = 0; debug("eval %s", *cpp); - keepthis = killconsts ? false : true; + constexpr = killconsts ? false : true; ret = eval_table(eval_ops, &val, cpp); - debug("val:%d ret:%d keepthis:%d", val, ret, keepthis); - return (keepthis ? LT_IF : ret); + debug("eval = %d", val); + return (constexpr ? LT_IF : ret == LT_ERROR ? LT_IF : ret); +} + +/* + * Read a line and examine its initial part to determine if it is a + * preprocessor directive. Returns NULL on EOF, or a pointer to a + * preprocessor directive name, or a pointer to the zero byte at the + * end of the line. + */ +static const char * +skiphash(void) +{ + const char *cp; + + linenum++; + if (fgets(tline, MAXLINE, input) == NULL) { + if (ferror(input)) + err(2, "can't read %s", filename); + else + return (NULL); + } + cp = skipcomment(tline); + if (linestate == LS_START && *cp == '#') { + linestate = LS_HASH; + return (skipcomment(cp + 1)); + } else if (*cp == '\0') { + return (cp); + } else { + return (skipline(cp)); + } +} + +/* + * Mark a line dirty and consume the rest of it, keeping track of the + * lexical state. + */ +static const char * +skipline(const char *cp) +{ + linestate = LS_DIRTY; + while (*cp != '\0') + cp = skipcomment(cp + 1); + return (cp); } /* @@ -869,11 +1146,16 @@ skipcomment(const char *cp) } while (*cp != '\0') /* don't reset to LS_START after a line continuation */ - if (strncmp(cp, "\\\n", 2) == 0) + if (strncmp(cp, "\\\r\n", 3) == 0) + cp += 3; + else if (strncmp(cp, "\\\n", 2) == 0) cp += 2; else switch (incomment) { case NO_COMMENT: - if (strncmp(cp, "/\\\n", 3) == 0) { + if (strncmp(cp, "/\\\r\n", 4) == 0) { + incomment = STARTING_COMMENT; + cp += 4; + } else if (strncmp(cp, "/\\\n", 3) == 0) { incomment = STARTING_COMMENT; cp += 3; } else if (strncmp(cp, "/*", 2) == 0) { @@ -893,7 +1175,7 @@ skipcomment(const char *cp) } else if (strncmp(cp, "\n", 1) == 0) { linestate = LS_START; cp += 1; - } else if (strchr(" \t", *cp) != NULL) { + } else if (strchr(" \r\t", *cp) != NULL) { cp += 1; } else return (cp); @@ -925,7 +1207,10 @@ skipcomment(const char *cp) cp += 1; continue; case C_COMMENT: - if (strncmp(cp, "*\\\n", 3) == 0) { + if (strncmp(cp, "*\\\r\n", 4) == 0) { + incomment = FINISHING_COMMENT; + cp += 4; + } else if (strncmp(cp, "*\\\n", 3) == 0) { incomment = FINISHING_COMMENT; cp += 3; } else if (strncmp(cp, "*/", 2) == 0) { @@ -954,13 +1239,37 @@ skipcomment(const char *cp) incomment = C_COMMENT; continue; default: - debug("bug at line %d", __LINE__); abort(); /* bug */ } return (cp); } /* + * Skip macro arguments. + */ +static const char * +skipargs(const char *cp) +{ + const char *ocp = cp; + int level = 0; + cp = skipcomment(cp); + if (*cp != '(') + return (cp); + do { + if (*cp == '(') + level++; + if (*cp == ')') + level--; + cp = skipcomment(cp+1); + } while (level != 0 && *cp != '\0'); + if (level == 0) + return (cp); + else + /* Rewind and re-detect the syntax error later. */ + return (ocp); +} + +/* * Skip over an identifier. */ static const char * @@ -972,27 +1281,69 @@ skipsym(const char *cp) } /* - * Look for the symbol in the symbol table. If is is found, we return + * Skip whitespace and take a copy of any following identifier. + */ +static const char * +getsym(const char **cpp) +{ + const char *cp = *cpp, *sym; + + cp = skipcomment(cp); + cp = skipsym(sym = cp); + if (cp == sym) + return NULL; + *cpp = cp; + return (xstrdup(sym, cp)); +} + +/* + * Check that s (a symbol) matches the start of t, and that the + * following character in t is not a symbol character. Returns a + * pointer to the following character in t if there is a match, + * otherwise NULL. + */ +static const char * +matchsym(const char *s, const char *t) +{ + while (*s != '\0' && *t != '\0') + if (*s != *t) + return (NULL); + else + ++s, ++t; + if (*s == '\0' && endsym(*t)) + return(t); + else + return(NULL); +} + +/* + * Look for the symbol in the symbol table. If it is found, we return * the symbol table index, else we return -1. */ static int -findsym(const char *str) +findsym(const char **strp) { - const char *cp; + const char *str; int symind; - cp = skipsym(str); - if (cp == str) - return (-1); + str = *strp; + *strp = skipsym(str); if (symlist) { - printf("%.*s\n", (int)(cp-str), str); + if (*strp == str) + return (-1); + if (symdepth && firstsym) + printf("%s%3d", zerosyms ? "" : "\n", depth); + firstsym = zerosyms = false; + printf("%s%.*s%s", + symdepth ? " " : "", + (int)(*strp-str), str, + symdepth ? "" : "\n"); /* we don't care about the value of the symbol */ return (0); } for (symind = 0; symind < nsyms; ++symind) { - if (strlcmp(symname[symind], str, cp-str) == 0) { - debug("findsym %s %s", symname[symind], - value[symind] ? value[symind] : ""); + if (matchsym(symname[symind], str) != NULL) { + debugsym("findsym", symind); return (symind); } } @@ -1000,51 +1351,196 @@ findsym(const char *str) } /* + * Resolve indirect symbol values to their final definitions. + */ +static void +indirectsym(void) +{ + const char *cp; + int changed, sym, ind; + + do { + changed = 0; + for (sym = 0; sym < nsyms; ++sym) { + if (value[sym] == NULL) + continue; + cp = value[sym]; + ind = findsym(&cp); + if (ind == -1 || ind == sym || + *cp != '\0' || + value[ind] == NULL || + value[ind] == value[sym]) + continue; + debugsym("indir...", sym); + value[sym] = value[ind]; + debugsym("...ectsym", sym); + changed++; + } + } while (changed); +} + +/* + * Add a symbol to the symbol table, specified with the format sym=val + */ +static void +addsym1(bool ignorethis, bool definethis, char *symval) +{ + const char *sym, *val; + + sym = symval; + val = skipsym(sym); + if (definethis && *val == '=') { + symval[val - sym] = '\0'; + val = val + 1; + } else if (*val == '\0') { + val = definethis ? "1" : NULL; + } else { + usage(); + } + addsym2(ignorethis, sym, val); +} + +/* * Add a symbol to the symbol table. */ static void -addsym(bool ignorethis, bool definethis, char *sym) +addsym2(bool ignorethis, const char *sym, const char *val) { + const char *cp = sym; int symind; - char *val; - symind = findsym(sym); + symind = findsym(&cp); if (symind < 0) { if (nsyms >= MAXSYMS) errx(2, "too many symbols"); symind = nsyms++; } - symname[symind] = sym; ignore[symind] = ignorethis; - val = sym + (skipsym(sym) - sym); - if (definethis) { - if (*val == '=') { - value[symind] = val+1; - *val = '\0'; - } else if (*val == '\0') - value[symind] = ""; - else - usage(); + symname[symind] = sym; + value[symind] = val; + debugsym("addsym", symind); +} + +static void +debugsym(const char *why, int symind) +{ + debug("%s %s%c%s", why, symname[symind], + value[symind] ? '=' : ' ', + value[symind] ? value[symind] : "undef"); +} + +/* + * Add symbols to the symbol table from a file containing + * #define and #undef preprocessor directives. + */ +static void +defundefile(const char *fn) +{ + filename = fn; + input = fopen(fn, "rb"); + if (input == NULL) + err(2, "can't open %s", fn); + linenum = 0; + while (defundef()) + ; + if (ferror(input)) + err(2, "can't read %s", filename); + else + fclose(input); + if (incomment) + error("EOF in comment"); +} + +/* + * Read and process one #define or #undef directive + */ +static bool +defundef(void) +{ + const char *cp, *kw, *sym, *val, *end; + Comment_state wascomment; + + wascomment = incomment; + cp = skiphash(); + if (cp == NULL) + return (false); + if (*cp == '\0') + goto done; + /* strip trailing whitespace, and do a fairly rough check to + avoid unsupported multi-line preprocessor directives */ + end = cp + strlen(cp); + while (end > tline && strchr(" \t\n\r", end[-1]) != NULL) + --end; + if (end > tline && end[-1] == '\\') + Eioccc(); + + kw = cp; + if ((cp = matchsym("define", kw)) != NULL) { + sym = getsym(&cp); + if (sym == NULL) + error("missing macro name in #define"); + if (*cp == '(') { + val = "1"; + } else { + cp = skipcomment(cp); + val = (cp < end) ? xstrdup(cp, end) : ""; + } + debug("#define"); + addsym2(false, sym, val); + } else if ((cp = matchsym("undef", kw)) != NULL) { + sym = getsym(&cp); + if (sym == NULL) + error("missing macro name in #undef"); + cp = skipcomment(cp); + debug("#undef"); + addsym2(false, sym, NULL); } else { - if (*val != '\0') - usage(); - value[symind] = NULL; + error("unrecognized preprocessor directive"); } + skipline(cp); +done: + debug("parser line %d state %s comment %s line", linenum, + comment_name[incomment], linestate_name[linestate]); + return (true); } /* - * Compare s with n characters of t. - * The same as strncmp() except that it checks that s[n] == '\0'. + * Concatenate two strings into new memory, checking for failure. */ -static int -strlcmp(const char *s, const char *t, size_t n) +static char * +astrcat(const char *s1, const char *s2) { - while (n-- && *t != '\0') - if (*s != *t) - return ((unsigned char)*s - (unsigned char)*t); - else - ++s, ++t; - return ((unsigned char)*s); + char *s; + int len; + size_t size; + + len = snprintf(NULL, 0, "%s%s", s1, s2); + if (len < 0) + err(2, "snprintf"); + size = (size_t)len + 1; + s = (char *)malloc(size); + if (s == NULL) + err(2, "malloc"); + snprintf(s, size, "%s%s", s1, s2); + return (s); +} + +/* + * Duplicate a segment of a string, checking for failure. + */ +static const char * +xstrdup(const char *start, const char *end) +{ + size_t n; + char *s; + + if (end < start) abort(); /* bug */ + n = (size_t)(end - start) + 1; + s = malloc(n); + if (s == NULL) + err(2, "malloc"); + snprintf(s, n, "%s", start); + return (s); } /* @@ -1070,5 +1566,6 @@ error(const char *msg) else warnx("%s: %d: %s (#if line %d depth %d)", filename, linenum, msg, stifline[depth], depth); + closeio(); errx(2, "output may be truncated"); } diff --git a/extra/scripts/unifdef.h b/extra/scripts/unifdef.h new file mode 100644 index 000000000..d57a8660b --- /dev/null +++ b/extra/scripts/unifdef.h @@ -0,0 +1,56 @@ +/* + * Copyright (c) 2012 - 2013 Tony Finch <dot@dotat.at> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <sys/stat.h> + +#include <ctype.h> +#include <errno.h> +#include <stdarg.h> +#include <stdbool.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +/* Avoid err.h since this are non-standard BSD extensions */ +#define vwarnx(fmt, args) ({ fprintf(stderr, "unifdef: "); vfprintf(stderr, fmt, args); fprintf(stderr, "\n"); }) +#define warnx(fmt, args...) fprintf(stderr, "unifdef: " fmt "\n", ## args) +#define errx(exit_code, fmt, args...) ({ warnx(fmt, ## args); exit(exit_code); }) +#define err(exit_code, fmt, args...) errx(exit_code, fmt ": %s", ## args, strerror(errno)) + +/* portability stubs */ + +#define fbinmode(fp) (fp) + +#define replace(old,new) rename(old,new) + +static FILE * +mktempmode(char *tmp, int mode) +{ + int fd = mkstemp(tmp); + if (fd < 0) return (NULL); + fchmod(fd, mode & (S_IRWXU|S_IRWXG|S_IRWXO)); + return (fdopen(fd, "wb")); +} diff --git a/extra/scripts/version.h b/extra/scripts/version.h new file mode 100644 index 000000000..ed3e7c0fd --- /dev/null +++ b/extra/scripts/version.h @@ -0,0 +1,2 @@ +"@(#) $Version: unifdef-2.9.5.55501a6 $\n" +"@(#) $Date: 2013-06-12 15:50:39 +0100 $\n" |