citrus_viqr.c revision 1.6.22.2
1 /* $NetBSD: citrus_viqr.c,v 1.6.22.2 2017/07/21 20:22:29 perseant Exp $ */ 2 3 /*- 4 * Copyright (c)2006 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 #include <sys/cdefs.h> 31 #if defined(LIBC_SCCS) && !defined(lint) 32 __RCSID("$NetBSD: citrus_viqr.c,v 1.6.22.2 2017/07/21 20:22:29 perseant Exp $"); 33 #endif /* LIBC_SCCS and not lint */ 34 35 #include <sys/queue.h> 36 #include <sys/types.h> 37 #include <assert.h> 38 #include <errno.h> 39 #include <string.h> 40 #include <stdint.h> 41 #include <stdlib.h> 42 #include <stddef.h> 43 #include <wchar.h> 44 #include <limits.h> 45 46 #include "citrus_namespace.h" 47 #include "citrus_types.h" 48 #include "citrus_bcs.h" 49 #include "citrus_module.h" 50 #include "citrus_ctype.h" 51 #include "citrus_stdenc.h" 52 #include "citrus_viqr.h" 53 54 #define ESCAPE '\\' 55 56 /* 57 * this table generated from RFC 1456. 58 */ 59 static const char *mnemonic_rfc1456[0x100] = { 60 NULL , NULL , "A(?", NULL , NULL , "A(~", "A^~", NULL , 61 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , 62 NULL , NULL , NULL , NULL , "Y?" , NULL , NULL , NULL , 63 NULL , "Y~" , NULL , NULL , NULL , NULL , "Y." , NULL , 64 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , 65 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , 66 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , 67 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , 68 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , 69 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , 70 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , 71 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , 72 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , 73 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , 74 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , 75 NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , 76 "A." , "A('", "A(`", "A(.", "A^'", "A^`", "A^?", "A^.", 77 "E~" , "E." , "E^'", "E^`", "E^?", "E^~", "E^.", "O^'", 78 "O^`", "O^?", "O^~", "O^.", "O+.", "O+'", "O+`", "O+?", 79 "I." , "O?" , "O." , "I?" , "U?" , "U~" , "U." , "Y`" , 80 "O~" , "a('", "a(`", "a(.", "a^'", "a^`", "a^?", "a^.", 81 "e~" , "e." , "e^'", "e^`", "e^?", "e^~", "e^.", "o^'", 82 "o^`", "o^?", "o^~", "O+~", "O+" , "o^.", "o+`", "o+?", 83 "i." , "U+.", "U+'", "U+`", "U+?", "o+" , "o+'", "U+" , 84 "A`" , "A'" , "A^" , "A~" , "A?" , "A(" , "a(?", "a(~", 85 "E`" , "E'" , "E^" , "E?" , "I`" , "I'" , "I~" , "y`" , 86 "DD" , "u+'", "O`" , "O'" , "O^" , "a." , "y?" , "u+`", 87 "u+?", "U`" , "U'" , "y~" , "y." , "Y'" , "o+~", "u+" , 88 "a`" , "a'" , "a^" , "a~" , "a?" , "a(" , "u+~", "a^~", 89 "e`" , "e'" , "e^" , "e?" , "i`" , "i'" , "i~" , "i?" , 90 "dd" , "u+.", "o`" , "o'" , "o^" , "o~" , "o?" , "o." , 91 "u." , "u`" , "u'" , "u~" , "u?" , "y'" , "o+.", "U+~", 92 }; 93 94 typedef struct { 95 const char *name; 96 wchar_kuten_t value; 97 } mnemonic_def_t; 98 99 static const mnemonic_def_t mnemonic_ext[] = { 100 /* add extra mnemonic here (should be sorted by wchar_kuten_t order). */ 101 }; 102 static const size_t mnemonic_ext_size = 103 sizeof(mnemonic_ext) / sizeof(mnemonic_def_t); 104 105 static const char * 106 mnemonic_ext_find(wchar_kuten_t wc, const mnemonic_def_t *head, size_t n) 107 { 108 const mnemonic_def_t *mid; 109 110 _DIAGASSERT(head != NULL); 111 112 for (; n > 0; n >>= 1) { 113 mid = head + (n >> 1); 114 if (mid->value == wc) { 115 return mid->name; 116 } else if (mid->value < wc) { 117 head = mid + 1; 118 --n; 119 } 120 } 121 return NULL; 122 } 123 124 struct mnemonic_t; 125 typedef TAILQ_HEAD(mnemonic_list_t, mnemonic_t) mnemonic_list_t; 126 typedef struct mnemonic_t { 127 TAILQ_ENTRY(mnemonic_t) entry; 128 int ascii; 129 struct mnemonic_t *parent; 130 mnemonic_list_t child; 131 wchar_kuten_t value; 132 } mnemonic_t; 133 134 static mnemonic_t * 135 mnemonic_list_find(mnemonic_list_t *ml, int ch) 136 { 137 mnemonic_t *m; 138 139 _DIAGASSERT(ml != NULL); 140 141 TAILQ_FOREACH(m, ml, entry) { 142 if (m->ascii == ch) 143 return m; 144 } 145 146 return NULL; 147 } 148 149 static mnemonic_t * 150 mnemonic_create(mnemonic_t *parent, int ascii, wchar_kuten_t value) 151 { 152 mnemonic_t *m; 153 154 _DIAGASSERT(parent != NULL); 155 156 m = malloc(sizeof(*m)); 157 if (m != NULL) { 158 m->parent = parent; 159 m->ascii = ascii; 160 m->value = value; 161 TAILQ_INIT(&m->child); 162 } 163 164 return m; 165 } 166 167 static int 168 mnemonic_append_child(mnemonic_t *m, const char *s, 169 wchar_kuten_t value, wchar_kuten_t invalid) 170 { 171 int ch; 172 mnemonic_t *m0; 173 174 _DIAGASSERT(m != NULL); 175 _DIAGASSERT(s != NULL); 176 177 ch = (unsigned char)*s++; 178 if (ch == '\0') 179 return EINVAL; 180 m0 = mnemonic_list_find(&m->child, ch); 181 if (m0 == NULL) { 182 m0 = mnemonic_create(m, ch, (wchar_kuten_t)ch); 183 if (m0 == NULL) 184 return ENOMEM; 185 TAILQ_INSERT_TAIL(&m->child, m0, entry); 186 } 187 m = m0; 188 for (m0 = NULL; (ch = (unsigned char)*s) != '\0'; ++s) { 189 m0 = mnemonic_list_find(&m->child, ch); 190 if (m0 == NULL) { 191 m0 = mnemonic_create(m, ch, invalid); 192 if (m0 == NULL) 193 return ENOMEM; 194 TAILQ_INSERT_TAIL(&m->child, m0, entry); 195 } 196 m = m0; 197 } 198 if (m0 == NULL) 199 return EINVAL; 200 m0->value = value; 201 202 return 0; 203 } 204 205 static void 206 mnemonic_destroy(mnemonic_t *m) 207 { 208 mnemonic_t *m0; 209 210 _DIAGASSERT(m != NULL); 211 212 TAILQ_FOREACH(m0, &m->child, entry) 213 mnemonic_destroy(m0); 214 free(m); 215 } 216 217 typedef struct { 218 size_t mb_cur_max; 219 wchar_kuten_t invalid; 220 mnemonic_t *mroot; 221 } _VIQREncodingInfo; 222 223 typedef struct { 224 int chlen; 225 char ch[MB_LEN_MAX]; 226 } _VIQRState; 227 228 typedef struct { 229 _VIQREncodingInfo ei; 230 struct { 231 /* for future multi-locale facility */ 232 _VIQRState s_mblen; 233 _VIQRState s_mbrlen; 234 _VIQRState s_mbrtowc; 235 _VIQRState s_mbtowc; 236 _VIQRState s_mbsrtowcs; 237 _VIQRState s_mbsnrtowcs; 238 _VIQRState s_wcrtomb; 239 _VIQRState s_wcsrtombs; 240 _VIQRState s_wcsnrtombs; 241 _VIQRState s_wctomb; 242 } states; 243 } _VIQRCTypeInfo; 244 245 #define _CEI_TO_EI(_cei_) (&(_cei_)->ei) 246 #define _CEI_TO_STATE(_cei_, _func_) (_cei_)->states.s_##_func_ 247 248 #define _FUNCNAME(m) _citrus_VIQR_##m 249 #define _ENCODING_INFO _VIQREncodingInfo 250 #define _CTYPE_INFO _VIQRCTypeInfo 251 #define _ENCODING_STATE _VIQRState 252 #define _ENCODING_MB_CUR_MAX(_ei_) (_ei_)->mb_cur_max 253 #define _ENCODING_IS_STATE_DEPENDENT 1 254 #define _STATE_NEEDS_EXPLICIT_INIT(_ps_) 0 255 256 #include "citrus_u2k_template.h" 257 258 static void 259 /*ARGSUSED*/ 260 _citrus_VIQR_init_state(_VIQREncodingInfo * __restrict ei, 261 _VIQRState * __restrict psenc) 262 { 263 /* ei may be unused */ 264 _DIAGASSERT(psenc != NULL); 265 266 psenc->chlen = 0; 267 } 268 269 static void 270 /*ARGSUSED*/ 271 _citrus_VIQR_pack_state(_VIQREncodingInfo * __restrict ei, 272 void *__restrict pspriv, const _VIQRState * __restrict psenc) 273 { 274 /* ei may be unused */ 275 _DIAGASSERT(pspriv != NULL); 276 _DIAGASSERT(psenc != NULL); 277 278 memcpy(pspriv, (const void *)psenc, sizeof(*psenc)); 279 } 280 281 static __inline void 282 /*ARGSUSED*/ 283 _citrus_VIQR_unpack_state(_VIQREncodingInfo * __restrict ei, 284 _VIQRState * __restrict psenc, const void * __restrict pspriv) 285 { 286 /* ei may be unused */ 287 _DIAGASSERT(psenc != NULL); 288 _DIAGASSERT(pspriv != NULL); 289 290 memcpy((void *)psenc, pspriv, sizeof(*psenc)); 291 } 292 293 static int 294 _citrus_VIQR_mbrtowc_priv(_VIQREncodingInfo * __restrict ei, 295 wchar_ucs4_t * __restrict pwc, const char ** __restrict s, size_t n, 296 _VIQRState * __restrict psenc, size_t * __restrict nresult) 297 { 298 const char *s0; 299 wchar_kuten_t wc; 300 mnemonic_t *m, *m0; 301 size_t i; 302 int ch, escape; 303 304 _DIAGASSERT(ei != NULL); 305 /* pwc may be null */ 306 _DIAGASSERT(s != NULL); 307 _DIAGASSERT(psenc != NULL); 308 _DIAGASSERT(nresult != NULL); 309 310 if (*s == NULL) { 311 _citrus_VIQR_init_state(ei, psenc); 312 *nresult = (size_t)_ENCODING_IS_STATE_DEPENDENT; 313 return 0; 314 } 315 s0 = *s; 316 317 i = 0; 318 m = ei->mroot; 319 for (escape = 0;;) { 320 if (psenc->chlen == i) { 321 if (n-- < 1) { 322 *s = s0; 323 *nresult = (size_t)-2; 324 return 0; 325 } 326 psenc->ch[psenc->chlen++] = *s0++; 327 } 328 ch = (unsigned char)psenc->ch[i++]; 329 if (ch == ESCAPE) { 330 if (m != ei->mroot) 331 break; 332 escape = 1; 333 continue; 334 } 335 if (escape != 0) 336 break; 337 m0 = mnemonic_list_find(&m->child, ch); 338 if (m0 == NULL) 339 break; 340 m = m0; 341 } 342 while (m != ei->mroot) { 343 --i; 344 if (m->value != ei->invalid) 345 break; 346 m = m->parent; 347 } 348 if (ch == ESCAPE && m != ei->mroot) 349 ++i; 350 psenc->chlen -= i; 351 memmove(&psenc->ch[0], &psenc->ch[i], psenc->chlen); 352 wc = (m == ei->mroot) ? (wchar_kuten_t)ch : m->value; 353 if (pwc != NULL) 354 _citrus_VIQR_kt2ucs(ei, pwc, wc); 355 *nresult = (size_t)(wc == 0 ? 0 : s0 - *s); 356 *s = s0; 357 358 return 0; 359 } 360 361 static int 362 _citrus_VIQR_wcrtomb_priv(_VIQREncodingInfo * __restrict ei, 363 char * __restrict s, size_t n, wchar_ucs4_t wc, 364 _VIQRState * __restrict psenc, size_t * __restrict nresult) 365 { 366 mnemonic_t *m; 367 int ch; 368 const char *p; 369 370 _DIAGASSERT(ei != NULL); 371 _DIAGASSERT(s != NULL); 372 _DIAGASSERT(psenc != NULL); 373 _DIAGASSERT(nresult != NULL); 374 375 _citrus_VIQR_ucs2kt(ei, &wc, wc); 376 377 switch (psenc->chlen) { 378 case 0: case 1: 379 break; 380 default: 381 return EINVAL; 382 } 383 m = NULL; 384 if ((uint32_t)wc <= 0xFF) { 385 p = mnemonic_rfc1456[wc & 0xFF]; 386 if (p != NULL) 387 goto mnemonic_found; 388 if (n-- < 1) 389 goto e2big; 390 ch = (unsigned int)wc; 391 m = ei->mroot; 392 if (psenc->chlen > 0) { 393 m = mnemonic_list_find(&m->child, psenc->ch[0]); 394 if (m == NULL) 395 return EINVAL; 396 psenc->ch[0] = ESCAPE; 397 } 398 if (mnemonic_list_find(&m->child, ch) == NULL) { 399 psenc->chlen = 0; 400 m = NULL; 401 } 402 psenc->ch[psenc->chlen++] = ch; 403 } else { 404 p = mnemonic_ext_find(wc, &mnemonic_ext[0], mnemonic_ext_size); 405 if (p == NULL) { 406 *nresult = (size_t)-1; 407 return EILSEQ; 408 } else { 409 mnemonic_found: 410 psenc->chlen = 0; 411 while (*p != '\0') { 412 if (n-- < 1) 413 goto e2big; 414 psenc->ch[psenc->chlen++] = *p++; 415 } 416 } 417 } 418 memcpy(s, psenc->ch, psenc->chlen); 419 *nresult = psenc->chlen; 420 if (m == ei->mroot) { 421 psenc->ch[0] = ch; 422 psenc->chlen = 1; 423 } else { 424 psenc->chlen = 0; 425 } 426 427 return 0; 428 429 e2big: 430 *nresult = (size_t)-1; 431 return E2BIG; 432 } 433 434 static int 435 /* ARGSUSED */ 436 _citrus_VIQR_put_state_reset(_VIQREncodingInfo * __restrict ei, 437 char * __restrict s, size_t n, _VIQRState * __restrict psenc, 438 size_t * __restrict nresult) 439 { 440 /* ei may be unused */ 441 _DIAGASSERT(s != NULL); 442 _DIAGASSERT(psenc != NULL); 443 _DIAGASSERT(nresult != NULL); 444 445 switch (psenc->chlen) { 446 case 0: case 1: 447 break; 448 default: 449 return EINVAL; 450 } 451 *nresult = 0; 452 psenc->chlen = 0; 453 454 return 0; 455 } 456 457 static __inline int 458 /*ARGSUSED*/ 459 _citrus_VIQR_stdenc_wctocs(struct _citrus_stdenc *ce, 460 _csid_t * __restrict csid, _index_t * __restrict idx, wchar_kuten_t wc) 461 { 462 /* ei may be unused */ 463 _DIAGASSERT(csid != NULL); 464 _DIAGASSERT(idx != NULL); 465 466 *csid = 0; 467 *idx = (_index_t)wc; 468 469 return 0; 470 } 471 472 static __inline int 473 /*ARGSUSED*/ 474 _citrus_VIQR_stdenc_cstowc(struct _citrus_stdenc *ce, 475 wchar_kuten_t * __restrict pwc, _csid_t csid, _index_t idx) 476 { 477 /* ei may be unused */ 478 _DIAGASSERT(pwc != NULL); 479 480 if (csid != 0) 481 return EILSEQ; 482 *pwc = (wchar_kuten_t)idx; 483 484 return 0; 485 } 486 487 static void 488 _citrus_VIQR_encoding_module_uninit(_VIQREncodingInfo *ei) 489 { 490 _DIAGASSERT(ei != NULL); 491 492 mnemonic_destroy(ei->mroot); 493 } 494 495 static int 496 /*ARGSUSED*/ 497 _citrus_VIQR_encoding_module_init(_VIQREncodingInfo * __restrict ei, 498 const void * __restrict var, size_t lenvar) 499 { 500 int errnum; 501 const char *s; 502 size_t i, n; 503 const mnemonic_def_t *p; 504 505 _DIAGASSERT(ei != NULL); 506 /* var may be unused */ 507 508 ei->mb_cur_max = 1; 509 ei->invalid = (wchar_kuten_t)-1; 510 ei->mroot = mnemonic_create(NULL, '\0', ei->invalid); 511 if (ei->mroot == NULL) 512 return ENOMEM; 513 for (i = 0; i < sizeof(mnemonic_rfc1456) / sizeof(const char *); ++i) { 514 s = mnemonic_rfc1456[i]; 515 if (s == NULL) 516 continue; 517 n = strlen(s); 518 _DIAGASSERT(n <= MB_LEN_MAX); 519 if (ei->mb_cur_max < n) 520 ei->mb_cur_max = n; 521 errnum = mnemonic_append_child(ei->mroot, 522 s, (wchar_kuten_t)i, ei->invalid); 523 if (errnum != 0) { 524 _citrus_VIQR_encoding_module_uninit(ei); 525 return errnum; 526 } 527 } 528 for (i = 0; i < mnemonic_ext_size; ++i) { 529 p = &mnemonic_ext[i]; 530 _DIAGASSERT(p != NULL && p->name != NULL); 531 n = strlen(p->name); 532 _DIAGASSERT(n <= MB_LEN_MAX); 533 if (ei->mb_cur_max < n) 534 ei->mb_cur_max = n; 535 errnum = mnemonic_append_child(ei->mroot, 536 p->name, p->value, ei->invalid); 537 if (errnum != 0) { 538 _citrus_VIQR_encoding_module_uninit(ei); 539 return errnum; 540 } 541 } 542 543 return 0; 544 } 545 546 static __inline int 547 /*ARGSUSED*/ 548 _citrus_VIQR_stdenc_get_state_desc_generic(_VIQREncodingInfo * __restrict ei, 549 _VIQRState * __restrict psenc, int * __restrict rstate) 550 { 551 /* ei may be unused */ 552 _DIAGASSERT(psenc != NULL); 553 _DIAGASSERT(rstate != NULL); 554 555 *rstate = (psenc->chlen == 0) 556 ? _STDENC_SDGEN_INITIAL 557 : _STDENC_SDGEN_INCOMPLETE_CHAR; 558 559 return 0; 560 } 561 562 /* ---------------------------------------------------------------------- 563 * public interface for ctype 564 */ 565 566 _CITRUS_CTYPE_DECLS(VIQR); 567 _CITRUS_CTYPE_DEF_OPS(VIQR); 568 569 #include "citrus_ctype_template.h" 570 571 /* ---------------------------------------------------------------------- 572 * public interface for stdenc 573 */ 574 575 _CITRUS_STDENC_DECLS(VIQR); 576 _CITRUS_STDENC_DEF_OPS(VIQR); 577 578 #include "citrus_stdenc_template.h" 579
Indexes created Mon Oct 20 20:10:13 GMT 2025