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/*-
* Copyright (c) 2002-2004 Tim J. Robbins. All rights reserved.
* Copyright (c) 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Paul Borman at Krystal Technologies.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)big5.c 8.1 (Berkeley) 6/4/93";
#endif /* LIBC_SCCS and not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <errno.h>
#include <runetype.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#include "mblocal.h"
extern int __mb_sb_limit;
static size_t _BIG5_mbrtowc(wchar_t * __restrict, const char * __restrict,
size_t, mbstate_t * __restrict);
static int _BIG5_mbsinit(const mbstate_t *);
static size_t _BIG5_wcrtomb(char * __restrict, wchar_t,
mbstate_t * __restrict);
typedef struct {
wchar_t ch;
} _BIG5State;
int
_BIG5_init(_RuneLocale *rl)
{
__mbrtowc = _BIG5_mbrtowc;
__wcrtomb = _BIG5_wcrtomb;
__mbsinit = _BIG5_mbsinit;
_CurrentRuneLocale = rl;
__mb_cur_max = 2;
__mb_sb_limit = 128;
return (0);
}
static int
_BIG5_mbsinit(const mbstate_t *ps)
{
return (ps == NULL || ((const _BIG5State *)ps)->ch == 0);
}
static __inline int
_big5_check(u_int c)
{
c &= 0xff;
return ((c >= 0xa1 && c <= 0xfe) ? 2 : 1);
}
static size_t
_BIG5_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n,
mbstate_t * __restrict ps)
{
_BIG5State *bs;
wchar_t wc;
size_t len;
bs = (_BIG5State *)ps;
if ((bs->ch & ~0xFF) != 0) {
/* Bad conversion state. */
errno = EINVAL;
return ((size_t)-1);
}
if (s == NULL) {
s = "";
n = 1;
pwc = NULL;
}
if (n == 0)
/* Incomplete multibyte sequence */
return ((size_t)-2);
if (bs->ch != 0) {
if (*s == '\0') {
errno = EILSEQ;
return ((size_t)-1);
}
wc = (bs->ch << 8) | (*s & 0xFF);
if (pwc != NULL)
*pwc = wc;
bs->ch = 0;
return (1);
}
len = (size_t)_big5_check(*s);
wc = *s++ & 0xff;
if (len == 2) {
if (n < 2) {
/* Incomplete multibyte sequence */
bs->ch = wc;
return ((size_t)-2);
}
if (*s == '\0') {
errno = EILSEQ;
return ((size_t)-1);
}
wc = (wc << 8) | (*s++ & 0xff);
if (pwc != NULL)
*pwc = wc;
return (2);
} else {
if (pwc != NULL)
*pwc = wc;
return (wc == L'\0' ? 0 : 1);
}
}
static size_t
_BIG5_wcrtomb(char * __restrict s, wchar_t wc, mbstate_t * __restrict ps)
{
_BIG5State *bs;
bs = (_BIG5State *)ps;
if (bs->ch != 0) {
errno = EINVAL;
return ((size_t)-1);
}
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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