mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-22 11:17:19 +00:00
1949a3470f
convenient when the source string isn't null-terminated. Implement the other conversion functions (mbstowcs(), mbsrtowcs(), wcstombs(), wcsrtombs()) in terms of these new functions.
92 lines
2.5 KiB
C
92 lines
2.5 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <errno.h>
|
|
#include <limits.h>
|
|
#include <stdlib.h>
|
|
#include <wchar.h>
|
|
#include "mblocal.h"
|
|
|
|
size_t
|
|
mbsnrtowcs(wchar_t * __restrict dst, const char ** __restrict src,
|
|
size_t nms, size_t len, mbstate_t * __restrict ps)
|
|
{
|
|
static mbstate_t mbs;
|
|
|
|
if (ps == NULL)
|
|
ps = &mbs;
|
|
return (__mbsnrtowcs(dst, src, nms, len, ps));
|
|
}
|
|
|
|
size_t
|
|
__mbsnrtowcs_std(wchar_t * __restrict dst, const char ** __restrict src,
|
|
size_t nms, size_t len, mbstate_t * __restrict ps)
|
|
{
|
|
const char *s;
|
|
size_t nchr;
|
|
wchar_t wc;
|
|
size_t nb;
|
|
|
|
s = *src;
|
|
nchr = 0;
|
|
|
|
if (dst == NULL) {
|
|
for (;;) {
|
|
if ((nb = __mbrtowc(&wc, s, nms, ps)) == (size_t)-1)
|
|
/* Invalid sequence - mbrtowc() sets errno. */
|
|
return ((size_t)-1);
|
|
else if (nb == 0 || nb == (size_t)-2)
|
|
return (nchr);
|
|
s += nb;
|
|
nms -= nb;
|
|
nchr++;
|
|
}
|
|
/*NOTREACHED*/
|
|
}
|
|
|
|
while (len-- > 0) {
|
|
if ((nb = __mbrtowc(dst, s, nms, ps)) == (size_t)-1) {
|
|
*src = s;
|
|
return ((size_t)-1);
|
|
} else if (nb == (size_t)-2) {
|
|
*src = s + nms;
|
|
return (nchr);
|
|
} else if (nb == 0) {
|
|
*src = NULL;
|
|
return (nchr);
|
|
}
|
|
s += nb;
|
|
nms -= nb;
|
|
nchr++;
|
|
dst++;
|
|
}
|
|
*src = s;
|
|
return (nchr);
|
|
}
|