mskanji.c revision 172619 
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/cdefs.h>
40__FBSDID("$FreeBSD: head/lib/libc/locale/mskanji.c 172619 2007-10-13 16:28:22Z ache $");
41
42#include <sys/types.h>
43#include <errno.h>
44#include <runetype.h>
45#include <stdlib.h>
46#include <string.h>
47#include <wchar.h>
48#include "mblocal.h"
49
50extern int __mb_sb_limit;
51
52static size_t	_MSKanji_mbrtowc(wchar_t * __restrict, const char * __restrict,
53		    size_t, mbstate_t * __restrict);
54static int	_MSKanji_mbsinit(const mbstate_t *);
55static size_t	_MSKanji_wcrtomb(char * __restrict, wchar_t,
56		    mbstate_t * __restrict);
57
58typedef struct {
59	wchar_t	ch;
60} _MSKanjiState;
61
62int
63_MSKanji_init(_RuneLocale *rl)
64{
65
66	__mbrtowc = _MSKanji_mbrtowc;
67	__wcrtomb = _MSKanji_wcrtomb;
68	__mbsinit = _MSKanji_mbsinit;
69	_CurrentRuneLocale = rl;
70	__mb_cur_max = 2;
71	__mb_sb_limit = 256;
72	return (0);
73}
74
75static int
76_MSKanji_mbsinit(const mbstate_t *ps)
77{
78
79	return (ps == NULL || ((const _MSKanjiState *)ps)->ch == 0);
80}
81
82static size_t
83_MSKanji_mbrtowc(wchar_t * __restrict pwc, const char * __restrict s, size_t n,
84    mbstate_t * __restrict ps)
85{
86	_MSKanjiState *ms;
87	wchar_t wc;
88
89	ms = (_MSKanjiState *)ps;
90
91	if ((ms->ch & ~0xFF) != 0) {
92		/* Bad conversion state. */
93		errno = EINVAL;
94		return ((size_t)-1);
95	}
96
97	if (s == NULL) {
98		s = "";
99		n = 1;
100		pwc = NULL;
101	}
102
103	if (n == 0)
104		/* Incomplete multibyte sequence */
105		return ((size_t)-2);
106
107	if (ms->ch != 0) {
108		if (*s == '\0') {
109			errno = EILSEQ;
110			return ((size_t)-1);
111		}
112		wc = (ms->ch << 8) | (*s & 0xFF);
113		if (pwc != NULL)
114			*pwc = wc;
115		ms->ch = 0;
116		return (1);
117	}
118	wc = *s++ & 0xff;
119	if ((wc > 0x80 && wc < 0xa0) || (wc >= 0xe0 && wc < 0xfd)) {
120		if (n < 2) {
121			/* Incomplete multibyte sequence */
122			ms->ch = wc;
123			return ((size_t)-2);
124		}
125		if (*s == '\0') {
126			errno = EILSEQ;
127			return ((size_t)-1);
128		}
129		wc = (wc << 8) | (*s++ & 0xff);
130		if (pwc != NULL)
131			*pwc = wc;
132		return (2);
133	} else {
134		if (pwc != NULL)
135			*pwc = wc;
136		return (wc == L'\0' ? 0 : 1);
137	}
138}
139
140static size_t
141_MSKanji_wcrtomb(char * __restrict s, wchar_t wc, mbstate_t * __restrict ps)
142{
143	_MSKanjiState *ms;
144	int len, i;
145
146	ms = (_MSKanjiState *)ps;
147
148	if (ms->ch != 0) {
149		errno = EINVAL;
150		return ((size_t)-1);
151	}
152
153	if (s == NULL)
154		/* Reset to initial shift state (no-op) */
155		return (1);
156	len = (wc > 0x100) ? 2 : 1;
157	for (i = len; i-- > 0; )
158		*s++ = wc >> (i << 3);
159	return (len);
160}
161