freebsd-dev/lib/libc/stdio/fputwc.c
Tim J. Robbins 8f030a44b8 Introduce unlocked versions of fputwc() and fgetwc() called __fputwc()
and __fgetwc() which can be used when we know the file is locked.
2002-09-20 13:20:41 +00:00

86 lines
2.3 KiB
C

/*-
* Copyright (c) 2002 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "namespace.h"
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <wchar.h>
#include "un-namespace.h"
#include "libc_private.h"
#include "local.h"
/*
* Non-MT-safe version.
*/
wint_t
__fputwc(wchar_t wc, FILE *fp)
{
char buf[MB_LEN_MAX];
mbstate_t mbs;
size_t i, len;
if (MB_LEN_MAX == 1 && wc > 0 && wc <= UCHAR_MAX) {
/*
* Assume single-byte locale with no special encoding.
* A more careful test would be to check
* _CurrentRuneLocale->encoding.
*/
*buf = (unsigned char)wc;
len = 1;
} else {
memset(&mbs, 0, sizeof(mbs));
if ((len = wcrtomb(buf, wc, &mbs)) == (size_t)-1)
return (WEOF);
}
for (i = 0; i < len; i++)
if (__sputc((unsigned char)buf[i], fp) == EOF)
return (WEOF);
return ((wint_t)wc);
}
/*
* MT-safe version.
*/
wint_t
fputwc(wchar_t wc, FILE *fp)
{
wint_t r;
FLOCKFILE(fp);
ORIENT(fp, 1);
r = __fputwc(wc, fp);
FUNLOCKFILE(fp);
return (r);
}