xref: /freebsd/lib/libc/locale/mskanji.c (revision d37ea99837e6ad50837fd9fe1771ddf1c3ba6002)
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)
37 static 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("$FreeBSD$");
41 
42 #include <errno.h>
43 #include <runetype.h>
44 #include <stdlib.h>
45 #include <string.h>
46 #include <wchar.h>
47 #include "mblocal.h"
48 
49 int	_MSKanji_init(_RuneLocale *);
50 size_t	_MSKanji_mbrtowc(wchar_t * __restrict, const char * __restrict, size_t,
51 	    mbstate_t * __restrict);
52 int	_MSKanji_mbsinit(const mbstate_t *);
53 size_t	_MSKanji_wcrtomb(char * __restrict, wchar_t, mbstate_t * __restrict);
54 
55 typedef struct {
56 	wchar_t	ch;
57 } _MSKanjiState;
58 
59 int
60 _MSKanji_init(_RuneLocale *rl)
61 {
62 
63 	__mbrtowc = _MSKanji_mbrtowc;
64 	__wcrtomb = _MSKanji_wcrtomb;
65 	__mbsinit = _MSKanji_mbsinit;
66 	_CurrentRuneLocale = rl;
67 	__mb_cur_max = 2;
68 	return (0);
69 }
70 
71 int
72 _MSKanji_mbsinit(const mbstate_t *ps)
73 {
74 
75 	return (ps == NULL || ((const _MSKanjiState *)ps)->ch == 0);
76 }
77 
78 size_t
79 _MSKanji_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n,
80     mbstate_t * __restrict ps)
81 {
82 	_MSKanjiState *ms;
83 	wchar_t wc;
84 
85 	ms = (_MSKanjiState *)ps;
86 
87 	if ((ms->ch & ~0xFF) != 0) {
88 		/* Bad conversion state. */
89 		errno = EINVAL;
90 		return ((size_t)-1);
91 	}
92 
93 	if (s == NULL) {
94 		s = "";
95 		n = 1;
96 		pwc = NULL;
97 	}
98 
99 	if (n == 0)
100 		/* Incomplete multibyte sequence */
101 		return ((size_t)-2);
102 
103 	if (ms->ch != 0) {
104 		if (*s == '\0') {
105 			errno = EILSEQ;
106 			return ((size_t)-1);
107 		}
108 		wc = (ms->ch << 8) | (*s & 0xFF);
109 		if (pwc != NULL)
110 			*pwc = wc;
111 		ms->ch = 0;
112 		return (1);
113 	}
114 	wc = *s++ & 0xff;
115 	if ((wc > 0x80 && wc < 0xa0) || (wc >= 0xe0 && wc < 0xfd)) {
116 		if (n < 2) {
117 			/* Incomplete multibyte sequence */
118 			ms->ch = wc;
119 			return ((size_t)-2);
120 		}
121 		if (*s == '\0') {
122 			errno = EILSEQ;
123 			return ((size_t)-1);
124 		}
125 		wc = (wc << 8) | (*s++ & 0xff);
126 		if (pwc != NULL)
127 			*pwc = wc;
128 		return (2);
129 	} else {
130 		if (pwc != NULL)
131 			*pwc = wc;
132 		return (wc == L'\0' ? 0 : 1);
133 	}
134 }
135 
136 size_t
137 _MSKanji_wcrtomb(char * __restrict s, wchar_t wc, mbstate_t * __restrict ps)
138 {
139 	_MSKanjiState *ms;
140 	int len, i;
141 
142 	ms = (_MSKanjiState *)ps;
143 
144 	if (ms->ch != 0) {
145 		errno = EINVAL;
146 		return ((size_t)-1);
147 	}
148 
149 	if (s == NULL)
150 		/* Reset to initial shift state (no-op) */
151 		return (1);
152 	len = (wc > 0x100) ? 2 : 1;
153 	for (i = len; i-- > 0; )
154 		*s++ = wc >> (i << 3);
155 	return (len);
156 }
157