1 /* $FreeBSD: head/lib/libiconv_modules/UTF8/citrus_utf8.c 252583 2013-07-03 18:27:45Z peter $ */
2 /* $NetBSD: citrus_utf8.c,v 1.17 2008/06/14 16:01:08 tnozaki 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/cdefs.h>
63 #include <sys/types.h>
75 #include "citrus_namespace.h"
76 #include "citrus_types.h"
77 #include "citrus_module.h"
78 #include "citrus_stdenc.h"
79 #include "citrus_utf8.h"
82 /* ----------------------------------------------------------------------
83 * private stuffs used by templates
86 static uint8_t _UTF8_count_array[256] = {
87 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 00 - 0F */
88 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 10 - 1F */
89 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 20 - 2F */
90 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 30 - 3F */
91 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 40 - 4F */
92 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 50 - 5F */
93 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 60 - 6F */
94 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 70 - 7F */
95 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 80 - 8F */
96 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 90 - 9F */
97 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* A0 - AF */
98 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* B0 - BF */
99 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* C0 - CF */
100 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* D0 - DF */
101 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* E0 - EF */
102 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 0, 0 /* F0 - FF */
105 static uint8_t const *_UTF8_count = _UTF8_count_array;
107 static const uint32_t _UTF8_range[] = {
109 0x00000000, 0x00000080, 0x00000800, 0x00010000,
110 0x00200000, 0x04000000, 0x80000000,
118 typedef void *_UTF8EncodingInfo;
120 #define _CEI_TO_EI(_cei_) (&(_cei_)->ei)
121 #define _CEI_TO_STATE(_ei_, _func_) (_ei_)->states.s_##_func_
123 #define _FUNCNAME(m) _citrus_UTF8_##m
124 #define _ENCODING_INFO _UTF8EncodingInfo
125 #define _ENCODING_STATE _UTF8State
126 #define _ENCODING_MB_CUR_MAX(_ei_) 6
127 #define _ENCODING_IS_STATE_DEPENDENT 0
128 #define _STATE_NEEDS_EXPLICIT_INIT(_ps_) 0
131 _UTF8_findlen(wchar_t v)
136 c = (uint32_t)v; /*XXX*/
137 for (i = 1; i < sizeof(_UTF8_range) / sizeof(_UTF8_range[0]) - 1; i++)
138 if (c >= _UTF8_range[i] && c < _UTF8_range[i + 1])
141 return (-1); /*out of range*/
145 _UTF8_surrogate(wchar_t wc)
148 return (wc >= 0xd800 && wc <= 0xdfff);
153 _citrus_UTF8_init_state(_UTF8EncodingInfo *ei __unused, _UTF8State *s)
161 _citrus_UTF8_pack_state(_UTF8EncodingInfo *ei __unused, void *pspriv,
165 memcpy(pspriv, (const void *)s, sizeof(*s));
170 _citrus_UTF8_unpack_state(_UTF8EncodingInfo *ei __unused, _UTF8State *s,
174 memcpy((void *)s, pspriv, sizeof(*s));
178 _citrus_UTF8_mbrtowc_priv(_UTF8EncodingInfo *ei, wchar_t *pwc, const char **s,
179 size_t n, _UTF8State *psenc, size_t *nresult)
189 _citrus_UTF8_init_state(ei, psenc);
190 *nresult = 0; /* state independent */
194 /* make sure we have the first byte in the buffer */
195 if (psenc->chlen == 0) {
198 psenc->ch[psenc->chlen++] = *s0++;
201 c = _UTF8_count[psenc->ch[0] & 0xff];
202 if (c < 1 || c < psenc->chlen)
206 wchar = psenc->ch[0] & 0xff;
208 while (psenc->chlen < c) {
211 psenc->ch[psenc->chlen++] = *s0++;
213 wchar = psenc->ch[0] & (0x7f >> c);
214 for (i = 1; i < c; i++) {
215 if ((psenc->ch[i] & 0xc0) != 0x80)
218 wchar |= (psenc->ch[i] & 0x3f);
220 if (_UTF8_surrogate(wchar) || _UTF8_findlen(wchar) != c)
225 *nresult = (wchar == 0) ? 0 : s0 - *s;
232 *nresult = (size_t)-1;
237 *nresult = (size_t)-2;
242 _citrus_UTF8_wcrtomb_priv(_UTF8EncodingInfo *ei __unused, char *s, size_t n,
243 wchar_t wc, _UTF8State *psenc __unused, size_t *nresult)
249 if (_UTF8_surrogate(wc)) {
253 cnt = _UTF8_findlen(wc);
254 if (cnt <= 0 || cnt > 6) {
255 /* invalid UCS4 value */
260 /* bound check failure */
267 for (i = cnt - 1; i > 0; i--) {
268 s[i] = 0x80 | (c & 0x3f);
275 s[0] &= (0x7f >> cnt);
276 s[0] |= ((0xff00 >> cnt) & 0xff);
280 *nresult = (size_t)cnt;
284 *nresult = (size_t)-1;
290 _citrus_UTF8_stdenc_wctocs(_UTF8EncodingInfo * __restrict ei __unused,
291 _csid_t * __restrict csid, _index_t * __restrict idx,
296 *idx = (_citrus_index_t)wc;
303 _citrus_UTF8_stdenc_cstowc(_UTF8EncodingInfo * __restrict ei __unused,
304 wchar_t * __restrict wc, _csid_t csid, _index_t idx)
317 _citrus_UTF8_stdenc_get_state_desc_generic(_UTF8EncodingInfo * __restrict ei __unused,
318 _UTF8State * __restrict psenc, int * __restrict rstate)
321 *rstate = (psenc->chlen == 0) ? _STDENC_SDGEN_INITIAL :
322 _STDENC_SDGEN_INCOMPLETE_CHAR;
328 _citrus_UTF8_encoding_module_init(_UTF8EncodingInfo * __restrict ei __unused,
329 const void * __restrict var __unused, size_t lenvar __unused)
337 _citrus_UTF8_encoding_module_uninit(_UTF8EncodingInfo *ei __unused)
342 /* ----------------------------------------------------------------------
343 * public interface for stdenc
346 _CITRUS_STDENC_DECLS(UTF8);
347 _CITRUS_STDENC_DEF_OPS(UTF8);
349 #include "citrus_stdenc_template.h"