mirror of
git://sourceware.org/git/newlib-cygwin.git
synced 2025-01-15 11:00:04 +08:00
0751f22675
Implement basic wide char stdio functionality, based on FreeBSD.
* libc/include/stdio.h (__SORD): Define.
(__SWID): Define.
* libc/include/wchar.h: Add declarations for new wide char functions.
(getwc): Define as macro.
(getwchar): Ditto.
(putwc): Ditto.
(putwchar): Ditto.
* libc/include/sys/reent.h (struct __sFILE): Add _mbstate member.
(struct __sFILE64): Ditto.
* libc/stdio/Makefile.am (ELIX_4_SOURCES): Add fgetwc.c, fgetws.c,
fputwc.c, fputws.c, fwide.c, getwc.c, getwchar.c, putwc.c, putwchar.c
and ungetwc.c.
(CHEWOUT_FILES): Add fgetwc.def, fgetws.def, fputwc.def, fputws.def,
fwide.def, getwc.def, getwchar.def, putwc.def, putwchar.def and
ungetwc.def.
Add header dependency rules for the new files.
* libc/stdio/Makefile.in: Regenerate.
* libc/stdio/fgetwc.c: New file, implementing fgetwc and _fgetwc_r.
* libc/stdio/fgetws.c: New file, implementing fgetws and _fgetws_r.
* libc/stdio/findfp.c (std): Initialize FILE's _mbstate member.
(__sfmoreglue): Ditto.
* libc/stdio/fputs.c (_fputs_r): Set stream orientation.
* libc/stdio/fputwc.c: New file, implementing fputwc and _fputwc_r.
* libc/stdio/fputws.c: New file, implementing fputws and _fputws_r.
* libc/stdio/fread.c (_fread_r): Set stream orientation.
* libc/stdio/freopen.c (_freopen_r): Reset stream orientation. Reset
_mbstate.
* libc/stdio/fseek.c (_fseek_r): Reset _mbstate.
* libc/stdio/fwide.c: New file, implementing fwide and _fwide_r.
* libc/stdio/fwrite.c (_fwrite_r): Set stream orientation.
* libc/stdio/getwc.c: New file, implementing getwc and _getwc_r.
* libc/stdio/getwchar.c: New file, implementing getwchar and
_getwchar_r.
* libc/stdio/local.h (ORIENT): New macro.
* libc/stdio/puts.c (_puts_r): Set stream orientation.
* libc/stdio/putwc.c: New file, implementing putwc and _putwc_r.
* libc/stdio/putwchar.c: New file, implementing putwchar and
_putwchar_r.
* libc/stdio/refill.c (__srefill_r): Set stream orientation.
* libc/stdio/stdio.tex: Add documentation for new functions.
* libc/stdio/ungetc.c (_ungetc_r): Set stream orientation.
* libc/stdio/ungetwc.c: New file, implementing ungetwc and _ungetwc_r.
* libc/stdio/vfscanf.c (__SVFSCANF_R): Set stream orientation.
* libc/stdio/wbuf.c (__swbuf_r): Ditto.
116 lines
3.3 KiB
C
116 lines
3.3 KiB
C
/*-
|
|
* Copyright (c) 2002-2004 Tim J. Robbins.
|
|
* All rights reserved.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
/*
|
|
FUNCTION
|
|
<<ungetwc>>---push wide character data back into a stream
|
|
|
|
INDEX
|
|
ungetwc
|
|
INDEX
|
|
_ungetwc_r
|
|
|
|
ANSI_SYNOPSIS
|
|
#include <stdio.h>
|
|
#include <wchar.h>
|
|
wint_t ungetwc(wint_t <[wc]>, FILE *<[stream]>);
|
|
|
|
wint_t _ungetwc_r(struct _reent *<[reent]>, wint_t <[wc]>, FILE *<[stream]>);
|
|
|
|
DESCRIPTION
|
|
<<ungetwc>> is used to return wide characters back to <[stream]> to be
|
|
read again. If <[wc]> is WEOF, the stream is unchanged. Otherwise, the
|
|
wide character <[wc]> is put back on the stream, and subsequent reads will see
|
|
the wide chars pushed back in reverse order. Pushed wide chars are lost if the
|
|
stream is repositioned, such as by <<fseek>>, <<fsetpos>>, or
|
|
<<rewind>>.
|
|
|
|
The underlying file is not changed, but it is possible to push back
|
|
something different than what was originally read. Ungetting a
|
|
character will clear the end-of-stream marker, and decrement the file
|
|
position indicator. Pushing back beyond the beginning of a file gives
|
|
unspecified behavior.
|
|
|
|
The alternate function <<_ungetwc_r>> is a reentrant version. The
|
|
extra argument <[reent]> is a pointer to a reentrancy structure.
|
|
|
|
RETURNS
|
|
The wide character pushed back, or <<WEOF>> on error.
|
|
|
|
PORTABILITY
|
|
C99
|
|
*/
|
|
|
|
#include <_ansi.h>
|
|
#include <reent.h>
|
|
#include <errno.h>
|
|
#include <limits.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <wchar.h>
|
|
#include "local.h"
|
|
|
|
wint_t
|
|
_DEFUN(_ungetwc_r, (ptr, wc, fp),
|
|
struct _reent *ptr _AND
|
|
wint_t wc _AND
|
|
register FILE *fp)
|
|
{
|
|
char buf[MB_LEN_MAX];
|
|
size_t len;
|
|
|
|
_flockfile (fp);
|
|
ORIENT (fp, 1);
|
|
if (wc == WEOF)
|
|
wc = WEOF;
|
|
else if ((len = _wcrtomb_r(ptr, buf, wc, &fp->_mbstate)) == (size_t)-1)
|
|
{
|
|
fp->_flags |= __SERR;
|
|
wc = WEOF;
|
|
}
|
|
else
|
|
while (len-- != 0)
|
|
if (_ungetc_r(ptr, (unsigned char)buf[len], fp) == EOF)
|
|
{
|
|
wc = WEOF;
|
|
break;
|
|
}
|
|
_funlockfile (fp);
|
|
return wc;
|
|
}
|
|
|
|
/*
|
|
* MT-safe version.
|
|
*/
|
|
wint_t
|
|
_DEFUN(ungetwc, (wint_t wc, FILE *fp),
|
|
wint_t wc _AND
|
|
FILE *fp)
|
|
{
|
|
CHECK_INIT (_REENT, fp);
|
|
return _ungetwc_r (_REENT, wc, fp);
|
|
}
|