1 /* $NetBSD: src/lib/libc/citrus/modules/citrus_utf8.c,v 1.11 2004/12/21 11:25:43 yamt Exp $ */
2 /* $DragonFly: src/lib/libc/citrus/modules/citrus_utf8.c,v 1.1 2005/03/11 23:33:53 joerg Exp $ */
5 * Copyright (c)2002 Citrus Project,
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * The Regents of the University of California. All rights reserved.
34 * This code is derived from software contributed to Berkeley by
35 * Paul Borman at Krystal Technologies.
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
40 * 1. Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * 2. Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in the
44 * documentation and/or other materials provided with the distribution.
45 * 3. Neither the name of the University nor the names of its contributors
46 * may be used to endorse or promote products derived from this software
47 * without specific prior written permission.
49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
52 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
62 #include <sys/types.h>
73 #include "citrus_namespace.h"
74 #include "citrus_types.h"
75 #include "citrus_module.h"
76 #include "citrus_ctype.h"
77 #include "citrus_stdenc.h"
78 #include "citrus_utf8.h"
81 /* ----------------------------------------------------------------------
82 * private stuffs used by templates
85 static int _UTF8_count_array[256];
86 static int const *_UTF8_count = NULL;
88 static const u_int32_t _UTF8_range[] = {
90 0x00000000, 0x00000080, 0x00000800, 0x00010000,
91 0x00200000, 0x04000000, 0x80000000,
103 _UTF8EncodingInfo ei;
105 /* for future multi-locale facility */
108 _UTF8State s_mbrtowc;
110 _UTF8State s_mbsrtowcs;
111 _UTF8State s_wcrtomb;
112 _UTF8State s_wcsrtombs;
117 #define _CEI_TO_EI(_cei_) (&(_cei_)->ei)
118 #define _CEI_TO_STATE(_ei_, _func_) (_ei_)->states.s_##_func_
120 #define _FUNCNAME(m) _citrus_UTF8_##m
121 #define _ENCODING_INFO _UTF8EncodingInfo
122 #define _CTYPE_INFO _UTF8CTypeInfo
123 #define _ENCODING_STATE _UTF8State
124 #define _ENCODING_MB_CUR_MAX(_ei_) 6
125 #define _ENCODING_IS_STATE_DEPENDENT 0
126 #define _STATE_NEEDS_EXPLICIT_INIT(_ps_) 0
130 _UTF8_init_count(void)
134 memset(_UTF8_count_array, 0, sizeof(_UTF8_count_array));
135 for (i = 0; i <= 0x7f; i++)
136 _UTF8_count_array[i] = 1;
137 for (i = 0xc0; i <= 0xdf; i++)
138 _UTF8_count_array[i] = 2;
139 for (i = 0xe0; i <= 0xef; i++)
140 _UTF8_count_array[i] = 3;
141 for (i = 0xf0; i <= 0xf7; i++)
142 _UTF8_count_array[i] = 4;
143 for (i = 0xf8; i <= 0xfb; i++)
144 _UTF8_count_array[i] = 5;
145 for (i = 0xfc; i <= 0xfd; i++)
146 _UTF8_count_array[i] = 6;
147 _UTF8_count = _UTF8_count_array;
152 _UTF8_findlen(wchar_t v)
157 c = (u_int32_t)v; /*XXX*/
158 for (i = 1; i < sizeof(_UTF8_range) / sizeof(_UTF8_range[0]); i++)
159 if (c >= _UTF8_range[i] && c < _UTF8_range[i + 1])
162 return -1; /*out of range*/
167 _citrus_UTF8_init_state(_UTF8EncodingInfo *ei, _UTF8State *s)
169 memset(s, 0, sizeof(*s));
174 _citrus_UTF8_pack_state(_UTF8EncodingInfo *ei, void *pspriv,
177 memcpy(pspriv, (const void *)s, sizeof(*s));
182 _citrus_UTF8_unpack_state(_UTF8EncodingInfo *ei, _UTF8State *s,
185 memcpy((void *)s, pspriv, sizeof(*s));
189 _citrus_UTF8_mbrtowc_priv(_UTF8EncodingInfo *ei, wchar_t *pwc, const char **s,
190 size_t n, _UTF8State *psenc, size_t *nresult)
198 _DIAGASSERT(nresult != 0);
199 _DIAGASSERT(s != NULL);
200 _DIAGASSERT(psenc != NULL);
205 _citrus_UTF8_init_state(ei, psenc);
206 *nresult = 0; /* state independent */
210 chlenbak = psenc->chlen;
212 /* make sure we have the first byte in the buffer */
213 switch (psenc->chlen) {
218 psenc->ch[0] = *s0++;
222 case 1: case 2: case 3: case 4: case 5:
229 c = _UTF8_count[psenc->ch[0] & 0xff];
232 while (psenc->chlen < c) {
236 psenc->ch[psenc->chlen] = *s0++;
243 wchar = psenc->ch[0] & 0xff;
245 case 2: case 3: case 4: case 5: case 6:
246 wchar = psenc->ch[0] & (0x7f >> c);
247 for (i = 1; i < c; i++) {
248 if ((psenc->ch[i] & 0xc0) != 0x80)
251 wchar |= (psenc->ch[i] & 0x3f);
267 *nresult = c - chlenbak;
273 *nresult = (size_t)-1;
278 *nresult = (size_t)-2;
283 _citrus_UTF8_wcrtomb_priv(_UTF8EncodingInfo *ei, char *s, size_t n, wchar_t wc,
284 _UTF8State *psenc, size_t *nresult)
289 _DIAGASSERT(nresult != 0);
290 _DIAGASSERT(s != NULL);
292 cnt = _UTF8_findlen(wc);
293 if (cnt <= 0 || cnt > 6) {
294 /* invalid UCS4 value */
299 /* bound check failure */
306 for (i = cnt - 1; i > 0; i--) {
307 s[i] = 0x80 | (c & 0x3f);
314 s[0] &= (0x7f >> cnt);
315 s[0] |= ((0xff00 >> cnt) & 0xff);
319 *nresult = (size_t)cnt;
323 *nresult = (size_t)-1;
329 _citrus_UTF8_stdenc_wctocs(_UTF8EncodingInfo * __restrict ei,
330 _csid_t * __restrict csid,
331 _index_t * __restrict idx,
335 _DIAGASSERT(csid != NULL && idx != NULL);
338 *idx = (_citrus_index_t)wc;
345 _citrus_UTF8_stdenc_cstowc(_UTF8EncodingInfo * __restrict ei,
346 wchar_t * __restrict wc,
347 _csid_t csid, _index_t idx)
350 _DIAGASSERT(wc != NULL);
362 _citrus_UTF8_encoding_module_init(_UTF8EncodingInfo * __restrict ei,
363 const void * __restrict var, size_t lenvar)
367 memset(ei, 0, sizeof(*ei));
374 _citrus_UTF8_encoding_module_uninit(_UTF8EncodingInfo *ei)
379 /* ----------------------------------------------------------------------
380 * public interface for ctype
383 _CITRUS_CTYPE_DECLS(UTF8);
384 _CITRUS_CTYPE_DEF_OPS(UTF8);
386 #include "citrus_ctype_template.h"
388 /* ----------------------------------------------------------------------
389 * public interface for stdenc
392 _CITRUS_STDENC_DECLS(UTF8);
393 _CITRUS_STDENC_DEF_OPS(UTF8);
395 #include "citrus_stdenc_template.h"