1 /* $NetBSD: citrus_utf8.c,v 1.18 2013/05/28 16:57:56 joerg 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 1.18 2013/05/28 16:57:56 joerg 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_mbsnrtowcs; 115 _UTF8State s_wcrtomb; 116 _UTF8State s_wcsrtombs; 117 _UTF8State s_wcsnrtombs; 118 _UTF8State s_wctomb; 119 } states; 120 } _UTF8CTypeInfo; 121 122 #define _CEI_TO_EI(_cei_) (&(_cei_)->ei) 123 #define _CEI_TO_STATE(_ei_, _func_) (_ei_)->states.s_##_func_ 124 125 #define _FUNCNAME(m) _citrus_UTF8_##m 126 #define _ENCODING_INFO _UTF8EncodingInfo 127 #define _CTYPE_INFO _UTF8CTypeInfo 128 #define _ENCODING_STATE _UTF8State 129 #define _ENCODING_MB_CUR_MAX(_ei_) 6 130 #define _ENCODING_IS_STATE_DEPENDENT 0 131 #define _STATE_NEEDS_EXPLICIT_INIT(_ps_) 0 132 133 134 static __inline void 135 _UTF8_init_count(void) 136 { 137 int i; 138 if (!_UTF8_count) { 139 memset(_UTF8_count_array, 0, sizeof(_UTF8_count_array)); 140 for (i = 0; i <= 0x7f; i++) 141 _UTF8_count_array[i] = 1; 142 for (i = 0xc0; i <= 0xdf; i++) 143 _UTF8_count_array[i] = 2; 144 for (i = 0xe0; i <= 0xef; i++) 145 _UTF8_count_array[i] = 3; 146 for (i = 0xf0; i <= 0xf7; i++) 147 _UTF8_count_array[i] = 4; 148 for (i = 0xf8; i <= 0xfb; i++) 149 _UTF8_count_array[i] = 5; 150 for (i = 0xfc; i <= 0xfd; i++) 151 _UTF8_count_array[i] = 6; 152 _UTF8_count = _UTF8_count_array; 153 } 154 } 155 156 static int 157 _UTF8_findlen(wchar_t v) 158 { 159 int i; 160 u_int32_t c; 161 162 c = (u_int32_t)v; /*XXX*/ 163 for (i = 1; i < sizeof(_UTF8_range) / sizeof(_UTF8_range[0]) - 1; i++) 164 if (c >= _UTF8_range[i] && c < _UTF8_range[i + 1]) 165 return i; 166 167 return -1; /*out of range*/ 168 } 169 170 static __inline int 171 _UTF8_surrogate(wchar_t wc) 172 { 173 return wc >= 0xd800 && wc <= 0xdfff; 174 } 175 176 static __inline void 177 /*ARGSUSED*/ 178 _citrus_UTF8_init_state(_UTF8EncodingInfo *ei, _UTF8State *s) 179 { 180 s->chlen = 0; 181 } 182 183 static __inline void 184 /*ARGSUSED*/ 185 _citrus_UTF8_pack_state(_UTF8EncodingInfo *ei, void *pspriv, 186 const _UTF8State *s) 187 { 188 memcpy(pspriv, (const void *)s, sizeof(*s)); 189 } 190 191 static __inline void 192 /*ARGSUSED*/ 193 _citrus_UTF8_unpack_state(_UTF8EncodingInfo *ei, _UTF8State *s, 194 const void *pspriv) 195 { 196 memcpy((void *)s, pspriv, sizeof(*s)); 197 } 198 199 static int 200 _citrus_UTF8_mbrtowc_priv(_UTF8EncodingInfo *ei, wchar_t *pwc, const char **s, 201 size_t n, _UTF8State *psenc, size_t *nresult) 202 { 203 wchar_t wchar; 204 const char *s0; 205 int c; 206 int i; 207 208 _DIAGASSERT(nresult != 0); 209 _DIAGASSERT(s != NULL); 210 _DIAGASSERT(psenc != NULL); 211 212 s0 = *s; 213 214 if (s0 == NULL) { 215 _citrus_UTF8_init_state(ei, psenc); 216 *nresult = 0; /* state independent */ 217 return 0; 218 } 219 220 /* make sure we have the first byte in the buffer */ 221 if (psenc->chlen == 0) { 222 if (n-- < 1) 223 goto restart; 224 psenc->ch[psenc->chlen++] = *s0++; 225 } 226 227 c = _UTF8_count[psenc->ch[0] & 0xff]; 228 if (c < 1 || c < psenc->chlen) 229 goto ilseq; 230 231 if (c == 1) 232 wchar = psenc->ch[0] & 0xff; 233 else { 234 while (psenc->chlen < c) { 235 if (n-- < 1) 236 goto restart; 237 psenc->ch[psenc->chlen++] = *s0++; 238 } 239 wchar = psenc->ch[0] & (0x7f >> c); 240 for (i = 1; i < c; i++) { 241 if ((psenc->ch[i] & 0xc0) != 0x80) 242 goto ilseq; 243 wchar <<= 6; 244 wchar |= (psenc->ch[i] & 0x3f); 245 } 246 if (_UTF8_surrogate(wchar) || _UTF8_findlen(wchar) != c) 247 goto ilseq; 248 } 249 if (pwc != NULL) 250 *pwc = wchar; 251 *nresult = (wchar == 0) ? 0 : s0 - *s; 252 *s = s0; 253 psenc->chlen = 0; 254 255 return 0; 256 257 ilseq: 258 *nresult = (size_t)-1; 259 return EILSEQ; 260 261 restart: 262 *s = s0; 263 *nresult = (size_t)-2; 264 return 0; 265 } 266 267 static int 268 _citrus_UTF8_wcrtomb_priv(_UTF8EncodingInfo *ei, char *s, size_t n, wchar_t wc, 269 _UTF8State *psenc, size_t *nresult) 270 { 271 int cnt, i, ret; 272 wchar_t c; 273 274 _DIAGASSERT(nresult != 0); 275 _DIAGASSERT(s != NULL); 276 277 if (_UTF8_surrogate(wc)) { 278 ret = EILSEQ; 279 goto err; 280 } 281 cnt = _UTF8_findlen(wc); 282 if (cnt <= 0 || cnt > 6) { 283 /* invalid UCS4 value */ 284 ret = EILSEQ; 285 goto err; 286 } 287 if (n < cnt) { 288 /* bound check failure */ 289 ret = E2BIG; 290 goto err; 291 } 292 293 c = wc; 294 if (s) { 295 for (i = cnt - 1; i > 0; i--) { 296 s[i] = 0x80 | (c & 0x3f); 297 c >>= 6; 298 } 299 s[0] = c; 300 if (cnt == 1) 301 s[0] &= 0x7f; 302 else { 303 s[0] &= (0x7f >> cnt); 304 s[0] |= ((0xff00 >> cnt) & 0xff); 305 } 306 } 307 308 *nresult = (size_t)cnt; 309 return 0; 310 311 err: 312 *nresult = (size_t)-1; 313 return ret; 314 } 315 316 static __inline int 317 /*ARGSUSED*/ 318 _citrus_UTF8_stdenc_wctocs(_UTF8EncodingInfo * __restrict ei, 319 _csid_t * __restrict csid, 320 _index_t * __restrict idx, 321 wchar_t wc) 322 { 323 324 _DIAGASSERT(csid != NULL && idx != NULL); 325 326 *csid = 0; 327 *idx = (_citrus_index_t)wc; 328 329 return (0); 330 } 331 332 static __inline int 333 /*ARGSUSED*/ 334 _citrus_UTF8_stdenc_cstowc(_UTF8EncodingInfo * __restrict ei, 335 wchar_t * __restrict wc, 336 _csid_t csid, _index_t idx) 337 { 338 339 _DIAGASSERT(wc != NULL); 340 341 if (csid != 0) 342 return (EILSEQ); 343 344 *wc = (wchar_t)idx; 345 346 return (0); 347 } 348 349 static __inline int 350 /*ARGSUSED*/ 351 _citrus_UTF8_stdenc_get_state_desc_generic(_UTF8EncodingInfo * __restrict ei, 352 _UTF8State * __restrict psenc, 353 int * __restrict rstate) 354 { 355 356 if (psenc->chlen == 0) 357 *rstate = _STDENC_SDGEN_INITIAL; 358 else 359 *rstate = _STDENC_SDGEN_INCOMPLETE_CHAR; 360 361 return 0; 362 } 363 364 static int 365 /*ARGSUSED*/ 366 _citrus_UTF8_encoding_module_init(_UTF8EncodingInfo * __restrict ei, 367 const void * __restrict var, size_t lenvar) 368 { 369 _UTF8_init_count(); 370 371 return 0; 372 } 373 374 static void 375 /*ARGSUSED*/ 376 _citrus_UTF8_encoding_module_uninit(_UTF8EncodingInfo *ei) 377 { 378 } 379 380 381 /* ---------------------------------------------------------------------- 382 * public interface for ctype 383 */ 384 385 _CITRUS_CTYPE_DECLS(UTF8); 386 _CITRUS_CTYPE_DEF_OPS(UTF8); 387 388 #include "citrus_ctype_template.h" 389 390 /* ---------------------------------------------------------------------- 391 * public interface for stdenc 392 */ 393 394 _CITRUS_STDENC_DECLS(UTF8); 395 _CITRUS_STDENC_DEF_OPS(UTF8); 396 397 #include "citrus_stdenc_template.h" 398
Indexes created Sun Sep 21 16:09:51 GMT 2025