1 /* $FreeBSD: head/lib/libiconv_modules/BIG5/citrus_big5.c 252583 2013-07-03 18:27:45Z peter $ */ 2 /* $NetBSD: citrus_big5.c,v 1.12 2008/06/14 16:01:07 tnozaki Exp $ */ 3 4 /*- 5 * Copyright (c)2002, 2006 Citrus Project, 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 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. 16 * 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 27 * SUCH DAMAGE. 28 */ 29 30 /*- 31 * Copyright (c) 1993 32 * The Regents of the University of California. All rights reserved. 33 * 34 * This code is derived from software contributed to Berkeley by 35 * Paul Borman at Krystal Technologies. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 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. 48 * 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 59 * SUCH DAMAGE. 60 */ 61 62 #include <sys/cdefs.h> 63 #include <sys/queue.h> 64 #include <sys/types.h> 65 66 #include <assert.h> 67 #include <errno.h> 68 #include <limits.h> 69 #include <stddef.h> 70 #include <stdint.h> 71 #include <stdio.h> 72 #include <stdlib.h> 73 #include <string.h> 74 #include <wchar.h> 75 76 #include "citrus_namespace.h" 77 #include "citrus_prop.h" 78 #include "citrus_types.h" 79 #include "citrus_bcs.h" 80 #include "citrus_module.h" 81 #include "citrus_stdenc.h" 82 #include "citrus_big5.h" 83 84 /* ---------------------------------------------------------------------- 85 * private stuffs used by templates 86 */ 87 88 typedef struct { 89 int chlen; 90 char ch[2]; 91 } _BIG5State; 92 93 typedef struct _BIG5Exclude { 94 TAILQ_ENTRY(_BIG5Exclude) entry; 95 wint_t end; 96 wint_t start; 97 } _BIG5Exclude; 98 99 typedef TAILQ_HEAD(_BIG5ExcludeList, _BIG5Exclude) _BIG5ExcludeList; 100 101 typedef struct { 102 _BIG5ExcludeList excludes; 103 int cell[0x100]; 104 } _BIG5EncodingInfo; 105 106 #define _CEI_TO_EI(_cei_) (&(_cei_)->ei) 107 #define _CEI_TO_STATE(_cei_, _func_) (_cei_)->states.s_##_func_ 108 109 #define _FUNCNAME(m) _citrus_BIG5_##m 110 #define _ENCODING_INFO _BIG5EncodingInfo 111 #define _ENCODING_STATE _BIG5State 112 #define _ENCODING_MB_CUR_MAX(_ei_) 2 113 #define _ENCODING_IS_STATE_DEPENDENT 0 114 #define _STATE_NEEDS_EXPLICIT_INIT(_ps_) 0 115 116 117 static __inline void 118 /*ARGSUSED*/ 119 _citrus_BIG5_init_state(_BIG5EncodingInfo * __restrict ei __unused, 120 _BIG5State * __restrict s) 121 { 122 123 memset(s, 0, sizeof(*s)); 124 } 125 126 static __inline void 127 /*ARGSUSED*/ 128 _citrus_BIG5_pack_state(_BIG5EncodingInfo * __restrict ei __unused, 129 void * __restrict pspriv, 130 const _BIG5State * __restrict s) 131 { 132 133 memcpy(pspriv, (const void *)s, sizeof(*s)); 134 } 135 136 static __inline void 137 /*ARGSUSED*/ 138 _citrus_BIG5_unpack_state(_BIG5EncodingInfo * __restrict ei __unused, 139 _BIG5State * __restrict s, 140 const void * __restrict pspriv) 141 { 142 143 memcpy((void *)s, pspriv, sizeof(*s)); 144 } 145 146 static __inline int 147 _citrus_BIG5_check(_BIG5EncodingInfo *ei, unsigned int c) 148 { 149 150 return ((ei->cell[c & 0xFF] & 0x1) ? 2 : 1); 151 } 152 153 static __inline int 154 _citrus_BIG5_check2(_BIG5EncodingInfo *ei, unsigned int c) 155 { 156 157 return ((ei->cell[c & 0xFF] & 0x2) ? 1 : 0); 158 } 159 160 static __inline int 161 _citrus_BIG5_check_excludes(_BIG5EncodingInfo *ei, wint_t c) 162 { 163 _BIG5Exclude *exclude; 164 165 TAILQ_FOREACH(exclude, &ei->excludes, entry) { 166 if (c >= exclude->start && c <= exclude->end) 167 return (EILSEQ); 168 } 169 return (0); 170 } 171 172 static int 173 _citrus_BIG5_fill_rowcol(void ** __restrict ctx, const char * __restrict s, 174 uint64_t start, uint64_t end) 175 { 176 _BIG5EncodingInfo *ei; 177 uint64_t n; 178 int i; 179 180 if (start > 0xFF || end > 0xFF) 181 return (EINVAL); 182 ei = (_BIG5EncodingInfo *)ctx; 183 i = strcmp("row", s) ? 1 : 0; 184 i = 1 << i; 185 for (n = start; n <= end; ++n) 186 ei->cell[n & 0xFF] |= i; 187 return (0); 188 } 189 190 static int 191 /*ARGSUSED*/ 192 _citrus_BIG5_fill_excludes(void ** __restrict ctx, 193 const char * __restrict s __unused, uint64_t start, uint64_t end) 194 { 195 _BIG5EncodingInfo *ei; 196 _BIG5Exclude *exclude; 197 198 if (start > 0xFFFF || end > 0xFFFF) 199 return (EINVAL); 200 ei = (_BIG5EncodingInfo *)ctx; 201 exclude = TAILQ_LAST(&ei->excludes, _BIG5ExcludeList); 202 if (exclude != NULL && (wint_t)start <= exclude->end) 203 return (EINVAL); 204 exclude = (void *)malloc(sizeof(*exclude)); 205 if (exclude == NULL) 206 return (ENOMEM); 207 exclude->start = (wint_t)start; 208 exclude->end = (wint_t)end; 209 TAILQ_INSERT_TAIL(&ei->excludes, exclude, entry); 210 211 return (0); 212 } 213 214 static const _citrus_prop_hint_t root_hints[] = { 215 _CITRUS_PROP_HINT_NUM("row", &_citrus_BIG5_fill_rowcol), 216 _CITRUS_PROP_HINT_NUM("col", &_citrus_BIG5_fill_rowcol), 217 _CITRUS_PROP_HINT_NUM("excludes", &_citrus_BIG5_fill_excludes), 218 _CITRUS_PROP_HINT_END 219 }; 220 221 static void 222 /*ARGSUSED*/ 223 _citrus_BIG5_encoding_module_uninit(_BIG5EncodingInfo *ei) 224 { 225 _BIG5Exclude *exclude; 226 227 while ((exclude = TAILQ_FIRST(&ei->excludes)) != NULL) { 228 TAILQ_REMOVE(&ei->excludes, exclude, entry); 229 free(exclude); 230 } 231 } 232 233 static int 234 /*ARGSUSED*/ 235 _citrus_BIG5_encoding_module_init(_BIG5EncodingInfo * __restrict ei, 236 const void * __restrict var, size_t lenvar) 237 { 238 void *ctx = (void *)ei; 239 const char *s; 240 int err; 241 242 memset((void *)ei, 0, sizeof(*ei)); 243 TAILQ_INIT(&ei->excludes); 244 245 if (lenvar > 0 && var != NULL) { 246 s = _bcs_skip_ws_len((const char *)var, &lenvar); 247 if (lenvar > 0 && *s != '\0') { 248 err = _citrus_prop_parse_variable( 249 root_hints, (void *)ei, s, lenvar); 250 if (err == 0) 251 return (0); 252 253 _citrus_BIG5_encoding_module_uninit(ei); 254 memset((void *)ei, 0, sizeof(*ei)); 255 TAILQ_INIT(&ei->excludes); 256 } 257 } 258 259 /* fallback Big5-1984, for backward compatibility. */ 260 _citrus_BIG5_fill_rowcol((void **)&ctx, "row", 0xA1, 0xFE); 261 _citrus_BIG5_fill_rowcol((void **)&ctx, "col", 0x40, 0x7E); 262 _citrus_BIG5_fill_rowcol((void **)&ctx, "col", 0xA1, 0xFE); 263 264 return (0); 265 } 266 267 static int 268 /*ARGSUSED*/ 269 _citrus_BIG5_mbrtowc_priv(_BIG5EncodingInfo * __restrict ei, 270 wchar_t * __restrict pwc, 271 const char ** __restrict s, size_t n, 272 _BIG5State * __restrict psenc, 273 size_t * __restrict nresult) 274 { 275 wchar_t wchar; 276 const char *s0; 277 int c, chlenbak; 278 279 s0 = *s; 280 281 if (s0 == NULL) { 282 _citrus_BIG5_init_state(ei, psenc); 283 *nresult = 0; 284 return (0); 285 } 286 287 chlenbak = psenc->chlen; 288 289 /* make sure we have the first byte in the buffer */ 290 switch (psenc->chlen) { 291 case 0: 292 if (n < 1) 293 goto restart; 294 psenc->ch[0] = *s0++; 295 psenc->chlen = 1; 296 n--; 297 break; 298 case 1: 299 break; 300 default: 301 /* illegal state */ 302 goto ilseq; 303 } 304 305 c = _citrus_BIG5_check(ei, psenc->ch[0] & 0xff); 306 if (c == 0) 307 goto ilseq; 308 while (psenc->chlen < c) { 309 if (n < 1) { 310 goto restart; 311 } 312 psenc->ch[psenc->chlen] = *s0++; 313 psenc->chlen++; 314 n--; 315 } 316 317 switch (c) { 318 case 1: 319 wchar = psenc->ch[0] & 0xff; 320 break; 321 case 2: 322 if (!_citrus_BIG5_check2(ei, psenc->ch[1] & 0xff)) 323 goto ilseq; 324 wchar = ((psenc->ch[0] & 0xff) << 8) | (psenc->ch[1] & 0xff); 325 break; 326 default: 327 /* illegal state */ 328 goto ilseq; 329 } 330 331 if (_citrus_BIG5_check_excludes(ei, (wint_t)wchar) != 0) 332 goto ilseq; 333 334 *s = s0; 335 psenc->chlen = 0; 336 if (pwc) 337 *pwc = wchar; 338 *nresult = wchar ? c - chlenbak : 0; 339 340 return (0); 341 342 ilseq: 343 psenc->chlen = 0; 344 *nresult = (size_t)-1; 345 return (EILSEQ); 346 347 restart: 348 *s = s0; 349 *nresult = (size_t)-2; 350 return (0); 351 } 352 353 static int 354 /*ARGSUSED*/ 355 _citrus_BIG5_wcrtomb_priv(_BIG5EncodingInfo * __restrict ei, 356 char * __restrict s, 357 size_t n, wchar_t wc, _BIG5State * __restrict psenc __unused, 358 size_t * __restrict nresult) 359 { 360 unsigned char l; 361 int ret; 362 363 /* check invalid sequence */ 364 if (wc & ~0xffff || 365 _citrus_BIG5_check_excludes(ei, (wint_t)wc) != 0) { 366 ret = EILSEQ; 367 goto err; 368 } 369 370 if (wc & 0x8000) { 371 if (_citrus_BIG5_check(ei, (wc >> 8) & 0xff) != 2 || 372 !_citrus_BIG5_check2(ei, wc & 0xff)) { 373 ret = EILSEQ; 374 goto err; 375 } 376 l = 2; 377 } else { 378 if (wc & ~0xff || !_citrus_BIG5_check(ei, wc & 0xff)) { 379 ret = EILSEQ; 380 goto err; 381 } 382 l = 1; 383 } 384 385 if (n < l) { 386 /* bound check failure */ 387 ret = E2BIG; 388 goto err; 389 } 390 391 if (l == 2) { 392 s[0] = (wc >> 8) & 0xff; 393 s[1] = wc & 0xff; 394 } else 395 s[0] = wc & 0xff; 396 397 *nresult = l; 398 399 return (0); 400 401 err: 402 *nresult = (size_t)-1; 403 return (ret); 404 } 405 406 static __inline int 407 /*ARGSUSED*/ 408 _citrus_BIG5_stdenc_wctocs(_BIG5EncodingInfo * __restrict ei __unused, 409 _csid_t * __restrict csid, 410 _index_t * __restrict idx, wchar_t wc) 411 { 412 413 *csid = (wc < 0x100) ? 0 : 1; 414 *idx = (_index_t)wc; 415 416 return (0); 417 } 418 419 static __inline int 420 /*ARGSUSED*/ 421 _citrus_BIG5_stdenc_cstowc(_BIG5EncodingInfo * __restrict ei __unused, 422 wchar_t * __restrict wc, 423 _csid_t csid, _index_t idx) 424 { 425 426 switch (csid) { 427 case 0: 428 case 1: 429 *wc = (wchar_t)idx; 430 break; 431 default: 432 return (EILSEQ); 433 } 434 435 return (0); 436 } 437 438 static __inline int 439 /*ARGSUSED*/ 440 _citrus_BIG5_stdenc_get_state_desc_generic(_BIG5EncodingInfo * __restrict ei __unused, 441 _BIG5State * __restrict psenc, 442 int * __restrict rstate) 443 { 444 445 *rstate = (psenc->chlen == 0) ? _STDENC_SDGEN_INITIAL : 446 _STDENC_SDGEN_INCOMPLETE_CHAR; 447 return (0); 448 } 449 450 /* ---------------------------------------------------------------------- 451 * public interface for stdenc 452 */ 453 454 _CITRUS_STDENC_DECLS(BIG5); 455 _CITRUS_STDENC_DEF_OPS(BIG5); 456 457 #include "citrus_stdenc_template.h" 458