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/*-
* Copyright (c) 2003 David Xu <davidxu@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 <sys/types.h>
#include <runetype.h>
#include <stdlib.h>
#include <wchar.h>
extern size_t (*__mbrtowc)(wchar_t * __restrict, const char * __restrict,
size_t, mbstate_t * __restrict);
extern size_t (*__wcrtomb)(char * __restrict, wchar_t, mbstate_t * __restrict);
int _GB2312_init(_RuneLocale *);
size_t _GB2312_mbrtowc(wchar_t * __restrict, const char * __restrict, size_t,
mbstate_t * __restrict);
size_t _GB2312_wcrtomb(char * __restrict, wchar_t, mbstate_t * __restrict);
int
_GB2312_init(_RuneLocale *rl)
{
_CurrentRuneLocale = rl;
__mbrtowc = _GB2312_mbrtowc;
__wcrtomb = _GB2312_wcrtomb;
__mb_cur_max = 2;
return (0);
}
static __inline int
_GB2312_check(const char *str, size_t n)
{
const u_char *s = (const u_char *)str;
if (n == 0)
/* Incomplete multibyte sequence */
return (-2);
if (s[0] >= 0xa1 && s[0] <= 0xfe) {
if (n < 2)
/* Incomplete multibyte sequence */
return (-2);
if (s[1] < 0xa1 || s[1] > 0xfe)
/* Invalid multibyte sequence */
return (-1);
return (2);
} else if (s[0] & 0x80) {
/* Invalid multibyte sequence */
return (-1);
}
return (1);
}
size_t
_GB2312_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n,
mbstate_t * __restrict ps __unused)
{
wchar_t wc;
int i, len;
if (s == NULL)
/* Reset to initial shift state (no-op) */
return (0);
if ((len = _GB2312_check(s, n)) < 0)
return ((size_t)len);
wc = 0;
i = len;
while (i-- > 0)
wc = (wc << 8) | (unsigned char)*s++;
if (pwc != NULL)
*pwc = wc;
return (wc == L'\0' ? 0 : len);
}
size_t
_GB2312_wcrtomb(char * __restrict s, wchar_t wc,
mbstate_t * __restrict ps __unused)
{
if (s == NULL)
/* Reset to initial shift state (no-op) */
return (1);
if (wc & 0x8000) {
*s++ = (wc >> 8) & 0xff;
*s = wc & 0xff;
return (2);
}
*s = wc & 0xff;
return (1);
}
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