citrus_utf8.c revision 1.16.12.1
1 /* $NetBSD: citrus_utf8.c,v 1.16.12.1 2008/06/23 04:29:31 wrstuden Exp $ */ 2 3 /*- 4 * Copyright (c)2002 Citrus Project, 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 /*- 30 * Copyright (c) 1993 31 * The Regents of the University of California. All rights reserved. 32 * 33 * This code is derived from software contributed to Berkeley by 34 * Paul Borman at Krystal Technologies. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 */ 60 61 #include <sys/cdefs.h> 62 #if defined(LIBC_SCCS) && !defined(lint) 63 __RCSID("$NetBSD: citrus_utf8.c,v 1.16.12.1 2008/06/23 04:29:31 wrstuden Exp $"); 64 #endif /* LIBC_SCCS and not lint */ 65 66 #include <assert.h> 67 #include <errno.h> 68 #include <string.h> 69 #include <stdio.h> 70 #include <stdlib.h> 71 #include <stddef.h> 72 #include <wchar.h> 73 #include <sys/types.h> 74 #include <limits.h> 75 76 #include "citrus_namespace.h" 77 #include "citrus_types.h" 78 #include "citrus_module.h" 79 #include "citrus_ctype.h" 80 #include "citrus_stdenc.h" 81 #include "citrus_utf8.h" 82 83 84 /* ---------------------------------------------------------------------- 85 * private stuffs used by templates 86 */ 87 88 static int _UTF8_count_array[256]; 89 static int const *_UTF8_count = NULL; 90 91 static const u_int32_t _UTF8_range[] = { 92 0, /*dummy*/ 93 0x00000000, 0x00000080, 0x00000800, 0x00010000, 94 0x00200000, 0x04000000, 0x80000000, 95 }; 96 97 typedef struct { 98 char ch[6]; 99 int chlen; 100 } _UTF8State; 101 102 typedef struct { 103 } _UTF8EncodingInfo; 104 105 typedef struct { 106 _UTF8EncodingInfo ei; 107 struct { 108 /* for future multi-locale facility */ 109 _UTF8State s_mblen; 110 _UTF8State s_mbrlen; 111 _UTF8State s_mbrtowc; 112 _UTF8State s_mbtowc; 113 _UTF8State s_mbsrtowcs; 114 _UTF8State s_wcrtomb; 115 _UTF8State s_wcsrtombs; 116 _UTF8State s_wctomb; 117 } states; 118 } _UTF8CTypeInfo; 119 120 #define _CEI_TO_EI(_cei_) (&(_cei_)->ei) 121 #define _CEI_TO_STATE(_ei_, _func_) (_ei_)->states.s_##_func_ 122 123 #define _FUNCNAME(m) _citrus_UTF8_##m 124 #define _ENCODING_INFO _UTF8EncodingInfo 125 #define _CTYPE_INFO _UTF8CTypeInfo 126 #define _ENCODING_STATE _UTF8State 127 #define _ENCODING_MB_CUR_MAX(_ei_) 6 128 #define _ENCODING_IS_STATE_DEPENDENT 0 129 #define _STATE_NEEDS_EXPLICIT_INIT(_ps_) 0 130 131 132 static __inline void 133 _UTF8_init_count(void) 134 { 135 int i; 136 if (!_UTF8_count) { 137 memset(_UTF8_count_array, 0, sizeof(_UTF8_count_array)); 138 for (i = 0; i <= 0x7f; i++) 139 _UTF8_count_array[i] = 1; 140 for (i = 0xc0; i <= 0xdf; i++) 141 _UTF8_count_array[i] = 2; 142 for (i = 0xe0; i <= 0xef; i++) 143 _UTF8_count_array[i] = 3; 144 for (i = 0xf0; i <= 0xf7; i++) 145 _UTF8_count_array[i] = 4; 146 for (i = 0xf8; i <= 0xfb; i++) 147 _UTF8_count_array[i] = 5; 148 for (i = 0xfc; i <= 0xfd; i++) 149 _UTF8_count_array[i] = 6; 150 _UTF8_count = _UTF8_count_array; 151 } 152 } 153 154 static int 155 _UTF8_findlen(wchar_t v) 156 { 157 int i; 158 u_int32_t c; 159 160 c = (u_int32_t)v; /*XXX*/ 161 for (i = 1; i < sizeof(_UTF8_range) / sizeof(_UTF8_range[0]) - 1; i++) 162 if (c >= _UTF8_range[i] && c < _UTF8_range[i + 1]) 163 return i; 164 165 return -1; /*out of range*/ 166 } 167 168 static __inline int 169 _UTF8_surrogate(wchar_t wc) 170 { 171 return wc >= 0xd800 && wc <= 0xdfff; 172 } 173 174 static __inline void 175 /*ARGSUSED*/ 176 _citrus_UTF8_init_state(_UTF8EncodingInfo *ei, _UTF8State *s) 177 { 178 s->chlen = 0; 179 } 180 181 static __inline void 182 /*ARGSUSED*/ 183 _citrus_UTF8_pack_state(_UTF8EncodingInfo *ei, void *pspriv, 184 const _UTF8State *s) 185 { 186 memcpy(pspriv, (const void *)s, sizeof(*s)); 187 } 188 189 static __inline void 190 /*ARGSUSED*/ 191 _citrus_UTF8_unpack_state(_UTF8EncodingInfo *ei, _UTF8State *s, 192 const void *pspriv) 193 { 194 memcpy((void *)s, pspriv, sizeof(*s)); 195 } 196 197 static int 198 _citrus_UTF8_mbrtowc_priv(_UTF8EncodingInfo *ei, wchar_t *pwc, const char **s, 199 size_t n, _UTF8State *psenc, size_t *nresult) 200 { 201 wchar_t wchar; 202 const char *s0; 203 int c; 204 int i; 205 206 _DIAGASSERT(nresult != 0); 207 _DIAGASSERT(s != NULL); 208 _DIAGASSERT(psenc != NULL); 209 210 s0 = *s; 211 212 if (s0 == NULL) { 213 _citrus_UTF8_init_state(ei, psenc); 214 *nresult = 0; /* state independent */ 215 return 0; 216 } 217 218 /* make sure we have the first byte in the buffer */ 219 if (psenc->chlen == 0) { 220 if (n-- < 1) 221 goto restart; 222 psenc->ch[psenc->chlen++] = *s0++; 223 } 224 225 c = _UTF8_count[psenc->ch[0] & 0xff]; 226 if (c < 1 || c < psenc->chlen) 227 goto ilseq; 228 229 if (c == 1) 230 wchar = psenc->ch[0] & 0xff; 231 else { 232 while (psenc->chlen < c) { 233 if (n-- < 1) 234 goto restart; 235 psenc->ch[psenc->chlen++] = *s0++; 236 } 237 wchar = psenc->ch[0] & (0x7f >> c); 238 for (i = 1; i < c; i++) { 239 if ((psenc->ch[i] & 0xc0) != 0x80) 240 goto ilseq; 241 wchar <<= 6; 242 wchar |= (psenc->ch[i] & 0x3f); 243 } 244 if (_UTF8_surrogate(wchar) || _UTF8_findlen(wchar) != c) 245 goto ilseq; 246 } 247 if (pwc != NULL) 248 *pwc = wchar; 249 *nresult = (wchar == 0) ? 0 : s0 - *s; 250 *s = s0; 251 psenc->chlen = 0; 252 253 return 0; 254 255 ilseq: 256 *nresult = (size_t)-1; 257 return EILSEQ; 258 259 restart: 260 *s = s0; 261 *nresult = (size_t)-2; 262 return 0; 263 } 264 265 static int 266 _citrus_UTF8_wcrtomb_priv(_UTF8EncodingInfo *ei, char *s, size_t n, wchar_t wc, 267 _UTF8State *psenc, size_t *nresult) 268 { 269 int cnt, i, ret; 270 wchar_t c; 271 272 _DIAGASSERT(nresult != 0); 273 _DIAGASSERT(s != NULL); 274 275 if (_UTF8_surrogate(wc)) { 276 ret = EILSEQ; 277 goto err; 278 } 279 cnt = _UTF8_findlen(wc); 280 if (cnt <= 0 || cnt > 6) { 281 /* invalid UCS4 value */ 282 ret = EILSEQ; 283 goto err; 284 } 285 if (n < cnt) { 286 /* bound check failure */ 287 ret = E2BIG; 288 goto err; 289 } 290 291 c = wc; 292 if (s) { 293 for (i = cnt - 1; i > 0; i--) { 294 s[i] = 0x80 | (c & 0x3f); 295 c >>= 6; 296 } 297 s[0] = c; 298 if (cnt == 1) 299 s[0] &= 0x7f; 300 else { 301 s[0] &= (0x7f >> cnt); 302 s[0] |= ((0xff00 >> cnt) & 0xff); 303 } 304 } 305 306 *nresult = (size_t)cnt; 307 return 0; 308 309 err: 310 *nresult = (size_t)-1; 311 return ret; 312 } 313 314 static __inline int 315 /*ARGSUSED*/ 316 _citrus_UTF8_stdenc_wctocs(_UTF8EncodingInfo * __restrict ei, 317 _csid_t * __restrict csid, 318 _index_t * __restrict idx, 319 wchar_t wc) 320 { 321 322 _DIAGASSERT(csid != NULL && idx != NULL); 323 324 *csid = 0; 325 *idx = (_citrus_index_t)wc; 326 327 return (0); 328 } 329 330 static __inline int 331 /*ARGSUSED*/ 332 _citrus_UTF8_stdenc_cstowc(_UTF8EncodingInfo * __restrict ei, 333 wchar_t * __restrict wc, 334 _csid_t csid, _index_t idx) 335 { 336 337 _DIAGASSERT(wc != NULL); 338 339 if (csid != 0) 340 return (EILSEQ); 341 342 *wc = (wchar_t)idx; 343 344 return (0); 345 } 346 347 static __inline int 348 /*ARGSUSED*/ 349 _citrus_UTF8_stdenc_get_state_desc_generic(_UTF8EncodingInfo * __restrict ei, 350 _UTF8State * __restrict psenc, 351 int * __restrict rstate) 352 { 353 354 if (psenc->chlen == 0) 355 *rstate = _STDENC_SDGEN_INITIAL; 356 else 357 *rstate = _STDENC_SDGEN_INCOMPLETE_CHAR; 358 359 return 0; 360 } 361 362 static int 363 /*ARGSUSED*/ 364 _citrus_UTF8_encoding_module_init(_UTF8EncodingInfo * __restrict ei, 365 const void * __restrict var, size_t lenvar) 366 { 367 _UTF8_init_count(); 368 369 return 0; 370 } 371 372 static void 373 /*ARGSUSED*/ 374 _citrus_UTF8_encoding_module_uninit(_UTF8EncodingInfo *ei) 375 { 376 } 377 378 379 /* ---------------------------------------------------------------------- 380 * public interface for ctype 381 */ 382 383 _CITRUS_CTYPE_DECLS(UTF8); 384 _CITRUS_CTYPE_DEF_OPS(UTF8); 385 386 #include "citrus_ctype_template.h" 387 388 /* ---------------------------------------------------------------------- 389 * public interface for stdenc 390 */ 391 392 _CITRUS_STDENC_DECLS(UTF8); 393 _CITRUS_STDENC_DEF_OPS(UTF8); 394 395 #include "citrus_stdenc_template.h" 396
Indexes created Tue Oct 21 12:09:54 GMT 2025