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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2002-2004 Tim J. Robbins.
* All rights reserved.
*
* Copyright (c) 2011 The FreeBSD Foundation
* All rights reserved.
* Portions of this software were developed by David Chisnall
* under sponsorship from the FreeBSD Foundation.
*
* 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 <stdio.h>
#include <string.h>
#include <wchar.h>
#include "un-namespace.h"
#include "libc_private.h"
#include "local.h"
#include "mblocal.h"
wchar_t *
fgetws_l(wchar_t * __restrict ws, int n, FILE * __restrict fp, locale_t locale)
{
int sret;
wchar_t *wsp, *ret;
size_t nconv;
const char *src;
unsigned char *nl;
FIX_LOCALE(locale);
struct xlocale_ctype *l = XLOCALE_CTYPE(locale);
FLOCKFILE_CANCELSAFE(fp);
ORIENT(fp, 1);
if (n <= 0) {
fp->_flags |= __SERR;
errno = EINVAL;
goto error;
}
wsp = ws;
if (n == 1)
goto ok;
if (fp->_r <= 0 && __srefill(fp))
/* EOF or ferror */
goto error;
sret = 0;
do {
src = fp->_p;
nl = memchr(fp->_p, '\n', fp->_r);
nconv = l->__mbsnrtowcs(wsp, &src,
nl != NULL ? (nl - fp->_p + 1) : fp->_r,
n - 1, &fp->_mbstate);
if (nconv == (size_t)-1) {
/* Conversion error */
fp->_flags |= __SERR;
goto error;
}
if (src == NULL) {
/*
* We hit a null byte. Increment the character count,
* since mbsnrtowcs()'s return value doesn't include
* the terminating null, then resume conversion
* after the null.
*/
nconv++;
src = memchr(fp->_p, '\0', fp->_r);
src++;
}
fp->_r -= (unsigned char *)src - fp->_p;
fp->_p = (unsigned char *)src;
n -= nconv;
wsp += nconv;
} while ((wsp == ws || wsp[-1] != L'\n') && n > 1 && (fp->_r > 0 ||
(sret = __srefill(fp)) == 0));
if (sret && !__sfeof(fp))
/* ferror */
goto error;
if (!l->__mbsinit(&fp->_mbstate)) {
/* Incomplete character */
fp->_flags |= __SERR;
errno = EILSEQ;
goto error;
}
if (wsp == ws)
/* EOF */
goto error;
ok:
*wsp = L'\0';
ret = ws;
end:
FUNLOCKFILE_CANCELSAFE();
return (ret);
error:
ret = NULL;
goto end;
}
wchar_t *
fgetws(wchar_t * __restrict ws, int n, FILE * __restrict fp)
{
return fgetws_l(ws, n, fp, __get_locale());
}
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