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/*-
* Copyright (c) 2013 Ed Schouten <ed@FreeBSD.org>
* 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 <uchar.h>
#include "xlocale_private.h"
typedef struct {
char16_t lead_surrogate;
mbstate_t c32_mbstate;
} _Char16State;
size_t
c16rtomb_l(char * __restrict s, char16_t c16, mbstate_t * __restrict ps,
locale_t locale)
{
_Char16State *cs;
char32_t c32;
FIX_LOCALE(locale);
if (ps == NULL)
ps = &locale->c16rtomb;
cs = (_Char16State *)ps;
/* If s is a null pointer, the value of parameter c16 is ignored. */
if (s == NULL) {
c32 = 0;
} else if (cs->lead_surrogate >= 0xd800 &&
cs->lead_surrogate <= 0xdbff) {
/* We should see a trail surrogate now. */
if (c16 < 0xdc00 || c16 > 0xdfff) {
errno = EILSEQ;
return ((size_t)-1);
}
c32 = 0x10000 + ((cs->lead_surrogate & 0x3ff) << 10 |
(c16 & 0x3ff));
} else if (c16 >= 0xd800 && c16 <= 0xdbff) {
/* Store lead surrogate for next invocation. */
cs->lead_surrogate = c16;
return (0);
} else {
/* Regular character. */
c32 = c16;
}
cs->lead_surrogate = 0;
return (c32rtomb_l(s, c32, &cs->c32_mbstate, locale));
}
size_t
c16rtomb(char * __restrict s, char16_t c16, mbstate_t * __restrict ps)
{
return (c16rtomb_l(s, c16, ps, __get_locale()));
}
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