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/*-
* As noted in the source, some portions of this implementation are copied from
* FreeBSD libc. These are covered by the following copyright:
*
* Copyright (c) 2002-2004 Tim J. Robbins.
*
* 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.
*/
size_t
mbsnrtowcs_l(wchar_t * __restrict dst, const char ** __restrict src,
size_t nms, size_t len, mbstate_t * __restrict ps, locale_t loc)
{
const char *s;
size_t nchr;
wchar_t wc;
size_t nb;
FIX_LOCALE(loc);
s = *src;
nchr = 0;
if (dst == NULL) {
for (;;) {
if ((nb = mbrtowc_l(&wc, s, nms, ps, loc)) == (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_l(dst, s, nms, ps, loc)) == (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);
}
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