mskanji.c revision 128155 
1/*
2 * Copyright (c) 2002-2004 Tim J. Robbins. All rights reserved.
3 *
4 *    ja_JP.SJIS locale table for BSD4.4/rune
5 *    version 1.0
6 *    (C) Sin'ichiro MIYATANI / Phase One, Inc
7 *    May 12, 1995
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *      This product includes software developed by Phase One, Inc.
20 * 4. The name of Phase One, Inc. may be used to endorse or promote products
21 *    derived from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36#if defined(LIBC_SCCS) && !defined(lint)
37static char sccsid[] = "@(#)mskanji.c	1.0 (Phase One) 5/5/95";
38#endif /* LIBC_SCCS and not lint */
39#include <sys/param.h>
40__FBSDID("$FreeBSD: head/lib/libc/locale/mskanji.c 128155 2004-04-12 13:09:18Z tjr $");
41
42#include <errno.h>
43#include <runetype.h>
44#include <stdlib.h>
45#include <string.h>
46#include <wchar.h>
47
48extern size_t (*__mbrtowc)(wchar_t * __restrict, const char * __restrict,
49    size_t, mbstate_t * __restrict);
50extern int (*__mbsinit)(const mbstate_t *);
51extern size_t (*__wcrtomb)(char * __restrict, wchar_t, mbstate_t * __restrict);
52
53int	_MSKanji_init(_RuneLocale *);
54size_t	_MSKanji_mbrtowc(wchar_t * __restrict, const char * __restrict, size_t,
55	    mbstate_t * __restrict);
56int	_MSKanji_mbsinit(const mbstate_t *);
57size_t	_MSKanji_wcrtomb(char * __restrict, wchar_t, mbstate_t * __restrict);
58
59typedef struct {
60	int	count;
61	u_char	bytes[2];
62} _MSKanjiState;
63
64int
65_MSKanji_init(_RuneLocale *rl)
66{
67
68	__mbrtowc = _MSKanji_mbrtowc;
69	__wcrtomb = _MSKanji_wcrtomb;
70	__mbsinit = _MSKanji_mbsinit;
71	_CurrentRuneLocale = rl;
72	__mb_cur_max = 2;
73	return (0);
74}
75
76int
77_MSKanji_mbsinit(const mbstate_t *ps)
78{
79
80	return (ps == NULL || ((const _MSKanjiState *)ps)->count == 0);
81}
82
83size_t
84_MSKanji_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n,
85    mbstate_t * __restrict ps)
86{
87	_MSKanjiState *ms;
88	wchar_t wc;
89	int len, ocount;
90	size_t ncopy;
91
92	ms = (_MSKanjiState *)ps;
93
94	if (ms->count < 0 || ms->count > sizeof(ms->bytes)) {
95		errno = EINVAL;
96		return ((size_t)-1);
97	}
98
99	if (s == NULL) {
100		s = "";
101		n = 1;
102		pwc = NULL;
103	}
104
105	ncopy = MIN(MIN(n, MB_CUR_MAX), sizeof(ms->bytes) - ms->count);
106	memcpy(ms->bytes + ms->count, s, ncopy);
107	ocount = ms->count;
108	ms->count += ncopy;
109	s = (char *)ms->bytes;
110	n = ms->count;
111
112	if (n == 0)
113		/* Incomplete multibyte sequence */
114		return ((size_t)-2);
115	len = 1;
116	wc = *s++ & 0xff;
117	if ((wc > 0x80 && wc < 0xa0) || (wc >= 0xe0 && wc < 0xfd)) {
118		if (n < 2)
119			/* Incomplete multibyte sequence */
120			return ((size_t)-2);
121		wc = (wc << 8) | (*s++ & 0xff);
122		len = 2;
123	}
124	if (pwc != NULL)
125		*pwc = wc;
126	ms->count = 0;
127	return (wc == L'\0' ? 0 : len - ocount);
128}
129
130size_t
131_MSKanji_wcrtomb(char * __restrict s, wchar_t wc, mbstate_t * __restrict ps)
132{
133	_MSKanjiState *ms;
134	int len, i;
135
136	ms = (_MSKanjiState *)ps;
137
138	if (ms->count != 0) {
139		errno = EINVAL;
140		return ((size_t)-1);
141	}
142
143	if (s == NULL)
144		/* Reset to initial shift state (no-op) */
145		return (1);
146	len = (wc > 0x100) ? 2 : 1;
147	for (i = len; i-- > 0; )
148		*s++ = wc >> (i << 3);
149	return (len);
150}
151