diff options
Diffstat (limited to 'libc/misc/wchar')
| -rw-r--r-- | libc/misc/wchar/wstdio.c | 185 |
1 files changed, 28 insertions, 157 deletions
diff --git a/libc/misc/wchar/wstdio.c b/libc/misc/wchar/wstdio.c index 79cf1dfa1..a4984f3c1 100644 --- a/libc/misc/wchar/wstdio.c +++ b/libc/misc/wchar/wstdio.c @@ -1,3 +1,31 @@ +/* Copyright (C) 2002 Manuel Novoa III + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Library General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This 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 + * Library General Public License for more details. + * + * You should have received a copy of the GNU Library General Public + * License along with this library; if not, write to the Free + * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +/* ATTENTION! ATTENTION! ATTENTION! ATTENTION! ATTENTION! + * + * Besides uClibc, I'm using this code in my libc for elks, which is + * a 16-bit environment with a fairly limited compiler. It would make + * things much easier for me if this file isn't modified unnecessarily. + * In particular, please put any new or replacement functions somewhere + * else, and modify the makefile to use your version instead. + * Thanks. Manuel + * + * ATTENTION! ATTENTION! ATTENTION! ATTENTION! ATTENTION! */ + /* * ANSI/ISO C99 says @@ -260,41 +288,6 @@ UNLOCKED(wchar_t *,fgetws,(wchar_t *__restrict ws, int n, UNLOCKED(wint_t,fputwc,(wchar_t wc, FILE *stream),(wc, stream)) { -#if 0 - size_t r; - char buf[MB_LEN_MAX]; - - if (stream->modeflags & __FLAG_NARROW) { - stream->modeflags |= __FLAG_ERROR; - __set_errno(EBADF); - return WEOF; - } - stream->modeflags |= __FLAG_WIDE; - - /* TODO: - * If stream is in reading state with bad mbstate object, what to do? - * Should we check the state first? Should we check error indicator? - * Should we check reading or even read-only? - */ - /* It looks like the only ANSI/ISO C99 - blessed way of manipulating - * the stream's mbstate object is through fgetpos/fsetpos. */ - r = wcrtomb(buf, wc, &stream->state); - - return (r != ((size_t) -1) && (r == _stdio_fwrite(buf, r, stream))) - ? wc : WEOF; - -#elif 0 - - /* this is broken if wc == 0 !!! */ - wchar_t wbuf[2]; - - wbuf[0] = wc; - wbuf[1] = 0; - - return (fputws_unlocked(wbuf, stream) > 0) ? wc : WEOF; - -#else - size_t n; char buf[MB_LEN_MAX]; @@ -308,8 +301,6 @@ UNLOCKED(wint_t,fputwc,(wchar_t wc, FILE *stream),(wc, stream)) return (((n = wcrtomb(buf, wc, &stream->state)) != ((size_t)-1)) /* EILSEQ */ && (_stdio_fwrite(buf, n, stream) != n))/* Didn't write everything. */ ? wc : WEOF; - -#endif } strong_alias(fputwc_unlocked,putwc_unlocked); @@ -333,7 +324,6 @@ UNLOCKED_STREAM(wint_t,putwchar,(wchar_t wc),(wc),stdout) UNLOCKED(int,fputws,(const wchar_t *__restrict ws, register FILE *__restrict stream),(ws, stream)) { -#if 1 size_t n; char buf[64]; @@ -357,125 +347,6 @@ UNLOCKED(int,fputws,(const wchar_t *__restrict ws, } return 1; - - - - -#elif 1 - int result; - size_t n; - size_t len; - register char *s; - unsigned char *bufend; - char sbuf[MB_LEN_MAX]; - - if (stream->modeflags & __FLAG_NARROW) { - RETURN_BADF: - stream->modeflags |= __FLAG_ERROR; - __set_errno(EBADF); - return -1; - } - stream->modeflags |= __FLAG_WIDE; - - /* Note: What follows is setup grabbed from _stdio_fwrite and modified - * slightly. Since this is a wide stream, we can ignore bufgetc and - * bufputc if present. They always == bufstart. - * It is unfortunate that we need to duplicate so much code here, but - * we need to do the stream setup before starting the wc->mb conversion. */ - - if ((stream->modeflags & __FLAG_READONLY) -#ifndef __STDIO_AUTO_RW_TRANSITION - /* ANSI/ISO requires either at EOF or currently not reading. */ - || ((stream->modeflags & (__FLAG_READING|__FLAG_EOF)) - == __FLAG_READING) -#endif /* __STDIO_AUTO_RW_TRANSITION */ - ) { - /* TODO: This is for posix behavior if readonly. To save space, we - * use this errno for write attempt while reading, as no errno is - * specified by posix for this case, even though the restriction is - * mentioned in fopen(). */ - goto RETURN_BADF; - } - -#ifdef __STDIO_AUTO_RW_TRANSITION - /* If reading, deal with ungots and read-buffered chars. */ - if (stream->modeflags & __FLAG_READING) { - if (((stream->bufpos < stream->bufread) - || (stream->modeflags & __MASK_UNGOT)) - /* If appending, we might as well seek to end to save a seek. */ - /* TODO: set EOF in fseek when appropriate? */ - && fseek(stream, 0L, - ((stream->modeflags & __FLAG_APPEND) - ? SEEK_END : SEEK_CUR)) - ) { - /* Note: This differs from glibc's apparent behavior of - not setting the error flag and discarding the buffered - read data. */ - stream->modeflags |= __FLAG_ERROR; /* fseek may not set this. */ - return -1; /* Fail if we need to fseek but can't. */ - } - /* Always reset even if fseek called (saves a test). */ - stream->bufpos = stream->bufread = stream->bufstart; - stream->modeflags &= ~__FLAG_READING; - } -#endif - - /* Ok, the boilerplate from _stdio_fwrite is done. */ - - if (stream->bufpos > stream->bufstart) { /* Pending writes.. */ - /* This is a performance penalty, but it simplifies the code below. - * If this is removed, the buffer sharing and while loop condition - * need to be modified below (at least). We at least save a little - * on the overhead by calling _stdio_fwrite directly instead of - * fflush_unlocked. */ - if (_stdio_fwrite(NULL, 0, stream) > 0) {/* fflush incomplete! */ - return -1; - } - } - - stream->modeflags |= __FLAG_WRITING; /* Ensure Writing flag is set. */ - - /* Next, we "steal" the stream's buffer and do the wc->mb conversion - * straight into it. This will cause the equivalent of an fflush - * for each string write. :-( */ - - bufend = NULL; - s = stream->bufstart; - - if ((len = stream->bufend - stream->bufstart) < MB_LEN_MAX) { - /* Stream is unbuffered or buffer is too small, so deactivate. */ - bufend = stream->bufend; - stream->bufend = stream->bufstart; - s = sbuf; - len = MB_LEN_MAX; - } - - result = 1; /* Assume success. */ - while (ws && (n = wcsrtombs(s, &ws, len, &stream->state)) != 0) { - if ((n == ((size_t) -1)) /* Encoding error! */ - /* TODO - maybe call write directly? but what about custom streams? */ - || (_stdio_fwrite(s, n, stream) != n)/* Didn't write everything. */ - ) { - result = -1; - break; - } - } - - if (bufend) { /* If deactivated stream buffer, renable it. */ - stream->bufend = bufend; - } - - return result; - -#else /* slow, dumb version */ - while (*ws) { - if (fputwc_unlocked(*ws, stream) == WEOF) { - return -1; - } - ++ws; - } - return 1; -#endif } #endif |