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/*-
* 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 <errno.h>
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
size_t
wcsrtombs(char * __restrict dst, const wchar_t ** __restrict src, size_t len,
mbstate_t * __restrict ps __unused)
{
char buf[MB_LEN_MAX];
const wchar_t *s;
size_t nbytes;
int nb;
s = *src;
nbytes = 0;
if (dst == NULL) {
for (;;) {
if ((nb = (int)wcrtomb(buf, *s, NULL)) < 0)
/* Invalid character - wcrtomb() sets errno. */
return ((size_t)-1);
else if (*s == L'\0')
return (nbytes + nb - 1);
s++;
nbytes += nb;
}
/*NOTREACHED*/
}
while (len > 0) {
if (len > (size_t)MB_CUR_MAX) {
/* Enough space to translate in-place. */
if ((nb = (int)wcrtomb(dst, *s, NULL)) < 0) {
*src = s;
return ((size_t)-1);
}
} else {
/* May not be enough space; use temp. buffer. */
if ((nb = (int)wcrtomb(buf, *s, NULL)) < 0) {
*src = s;
return ((size_t)-1);
}
if (nb > (int)len)
/* MB sequence for character won't fit. */
break;
memcpy(dst, buf, nb);
}
if (*s == L'\0') {
*src = NULL;
return (nbytes + nb - 1);
}
s++;
dst += nb;
len -= nb;
nbytes += nb;
}
*src = s;
return (nbytes);
}
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