Alexandre Lision | 8af73cb | 2013-12-10 14:11:20 -0500 | [diff] [blame] | 1 | /* $Id$ */ |
| 2 | /* |
| 3 | * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) |
| 4 | * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | #include <pjlib-util/scanner.h> |
| 21 | #include <pj/ctype.h> |
| 22 | #include <pj/string.h> |
| 23 | #include <pj/except.h> |
| 24 | #include <pj/os.h> |
| 25 | #include <pj/errno.h> |
| 26 | #include <pj/assert.h> |
| 27 | |
| 28 | #define PJ_SCAN_IS_SPACE(c) ((c)==' ' || (c)=='\t') |
| 29 | #define PJ_SCAN_IS_NEWLINE(c) ((c)=='\r' || (c)=='\n') |
| 30 | #define PJ_SCAN_IS_PROBABLY_SPACE(c) ((c) <= 32) |
| 31 | #define PJ_SCAN_CHECK_EOF(s) (s != scanner->end) |
| 32 | |
| 33 | |
| 34 | #if defined(PJ_SCANNER_USE_BITWISE) && PJ_SCANNER_USE_BITWISE != 0 |
| 35 | # include "scanner_cis_bitwise.c" |
| 36 | #else |
| 37 | # include "scanner_cis_uint.c" |
| 38 | #endif |
| 39 | |
| 40 | |
| 41 | static void pj_scan_syntax_err(pj_scanner *scanner) |
| 42 | { |
| 43 | (*scanner->callback)(scanner); |
| 44 | } |
| 45 | |
| 46 | |
| 47 | PJ_DEF(void) pj_cis_add_range(pj_cis_t *cis, int cstart, int cend) |
| 48 | { |
| 49 | /* Can not set zero. This is the requirement of the parser. */ |
| 50 | pj_assert(cstart > 0); |
| 51 | |
| 52 | while (cstart != cend) { |
| 53 | PJ_CIS_SET(cis, cstart); |
| 54 | ++cstart; |
| 55 | } |
| 56 | } |
| 57 | |
| 58 | PJ_DEF(void) pj_cis_add_alpha(pj_cis_t *cis) |
| 59 | { |
| 60 | pj_cis_add_range( cis, 'a', 'z'+1); |
| 61 | pj_cis_add_range( cis, 'A', 'Z'+1); |
| 62 | } |
| 63 | |
| 64 | PJ_DEF(void) pj_cis_add_num(pj_cis_t *cis) |
| 65 | { |
| 66 | pj_cis_add_range( cis, '0', '9'+1); |
| 67 | } |
| 68 | |
| 69 | PJ_DEF(void) pj_cis_add_str( pj_cis_t *cis, const char *str) |
| 70 | { |
| 71 | while (*str) { |
| 72 | PJ_CIS_SET(cis, *str); |
| 73 | ++str; |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | PJ_DEF(void) pj_cis_add_cis( pj_cis_t *cis, const pj_cis_t *rhs) |
| 78 | { |
| 79 | int i; |
| 80 | for (i=0; i<256; ++i) { |
| 81 | if (PJ_CIS_ISSET(rhs, i)) |
| 82 | PJ_CIS_SET(cis, i); |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | PJ_DEF(void) pj_cis_del_range( pj_cis_t *cis, int cstart, int cend) |
| 87 | { |
| 88 | while (cstart != cend) { |
| 89 | PJ_CIS_CLR(cis, cstart); |
| 90 | cstart++; |
| 91 | } |
| 92 | } |
| 93 | |
| 94 | PJ_DEF(void) pj_cis_del_str( pj_cis_t *cis, const char *str) |
| 95 | { |
| 96 | while (*str) { |
| 97 | PJ_CIS_CLR(cis, *str); |
| 98 | ++str; |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | PJ_DEF(void) pj_cis_invert( pj_cis_t *cis ) |
| 103 | { |
| 104 | unsigned i; |
| 105 | /* Can not set zero. This is the requirement of the parser. */ |
| 106 | for (i=1; i<256; ++i) { |
| 107 | if (PJ_CIS_ISSET(cis,i)) |
| 108 | PJ_CIS_CLR(cis,i); |
| 109 | else |
| 110 | PJ_CIS_SET(cis,i); |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | PJ_DEF(void) pj_scan_init( pj_scanner *scanner, char *bufstart, |
| 115 | pj_size_t buflen, unsigned options, |
| 116 | pj_syn_err_func_ptr callback ) |
| 117 | { |
| 118 | PJ_CHECK_STACK(); |
| 119 | |
| 120 | scanner->begin = scanner->curptr = bufstart; |
| 121 | scanner->end = bufstart + buflen; |
| 122 | scanner->line = 1; |
| 123 | scanner->start_line = scanner->begin; |
| 124 | scanner->callback = callback; |
| 125 | scanner->skip_ws = options; |
| 126 | |
| 127 | if (scanner->skip_ws) |
| 128 | pj_scan_skip_whitespace(scanner); |
| 129 | } |
| 130 | |
| 131 | |
| 132 | PJ_DEF(void) pj_scan_fini( pj_scanner *scanner ) |
| 133 | { |
| 134 | PJ_CHECK_STACK(); |
| 135 | PJ_UNUSED_ARG(scanner); |
| 136 | } |
| 137 | |
| 138 | PJ_DEF(void) pj_scan_skip_whitespace( pj_scanner *scanner ) |
| 139 | { |
| 140 | register char *s = scanner->curptr; |
| 141 | |
| 142 | while (PJ_SCAN_IS_SPACE(*s)) { |
| 143 | ++s; |
| 144 | } |
| 145 | |
| 146 | if (PJ_SCAN_IS_NEWLINE(*s) && (scanner->skip_ws & PJ_SCAN_AUTOSKIP_NEWLINE)) { |
| 147 | for (;;) { |
| 148 | if (*s == '\r') { |
| 149 | ++s; |
| 150 | if (*s == '\n') ++s; |
| 151 | ++scanner->line; |
| 152 | scanner->curptr = scanner->start_line = s; |
| 153 | } else if (*s == '\n') { |
| 154 | ++s; |
| 155 | ++scanner->line; |
| 156 | scanner->curptr = scanner->start_line = s; |
| 157 | } else if (PJ_SCAN_IS_SPACE(*s)) { |
| 158 | do { |
| 159 | ++s; |
| 160 | } while (PJ_SCAN_IS_SPACE(*s)); |
| 161 | } else { |
| 162 | break; |
| 163 | } |
| 164 | } |
| 165 | } |
| 166 | |
| 167 | if (PJ_SCAN_IS_NEWLINE(*s) && (scanner->skip_ws & PJ_SCAN_AUTOSKIP_WS_HEADER)==PJ_SCAN_AUTOSKIP_WS_HEADER) { |
| 168 | /* Check for header continuation. */ |
| 169 | scanner->curptr = s; |
| 170 | |
| 171 | if (*s == '\r') { |
| 172 | ++s; |
| 173 | } |
| 174 | if (*s == '\n') { |
| 175 | ++s; |
| 176 | } |
| 177 | scanner->start_line = s; |
| 178 | |
| 179 | if (PJ_SCAN_IS_SPACE(*s)) { |
| 180 | register char *t = s; |
| 181 | do { |
| 182 | ++t; |
| 183 | } while (PJ_SCAN_IS_SPACE(*t)); |
| 184 | |
| 185 | ++scanner->line; |
| 186 | scanner->curptr = t; |
| 187 | } |
| 188 | } else { |
| 189 | scanner->curptr = s; |
| 190 | } |
| 191 | } |
| 192 | |
| 193 | PJ_DEF(void) pj_scan_skip_line( pj_scanner *scanner ) |
| 194 | { |
| 195 | char *s = pj_ansi_strchr(scanner->curptr, '\n'); |
| 196 | if (!s) { |
| 197 | scanner->curptr = scanner->end; |
| 198 | } else { |
| 199 | scanner->curptr = scanner->start_line = s+1; |
| 200 | scanner->line++; |
| 201 | } |
| 202 | } |
| 203 | |
| 204 | PJ_DEF(int) pj_scan_peek( pj_scanner *scanner, |
| 205 | const pj_cis_t *spec, pj_str_t *out) |
| 206 | { |
| 207 | register char *s = scanner->curptr; |
| 208 | |
| 209 | if (s >= scanner->end) { |
| 210 | pj_scan_syntax_err(scanner); |
| 211 | return -1; |
| 212 | } |
| 213 | |
| 214 | /* Don't need to check EOF with PJ_SCAN_CHECK_EOF(s) */ |
| 215 | while (pj_cis_match(spec, *s)) |
| 216 | ++s; |
| 217 | |
| 218 | pj_strset3(out, scanner->curptr, s); |
| 219 | return *s; |
| 220 | } |
| 221 | |
| 222 | |
| 223 | PJ_DEF(int) pj_scan_peek_n( pj_scanner *scanner, |
| 224 | pj_size_t len, pj_str_t *out) |
| 225 | { |
| 226 | char *endpos = scanner->curptr + len; |
| 227 | |
| 228 | if (endpos > scanner->end) { |
| 229 | pj_scan_syntax_err(scanner); |
| 230 | return -1; |
| 231 | } |
| 232 | |
| 233 | pj_strset(out, scanner->curptr, len); |
| 234 | return *endpos; |
| 235 | } |
| 236 | |
| 237 | |
| 238 | PJ_DEF(int) pj_scan_peek_until( pj_scanner *scanner, |
| 239 | const pj_cis_t *spec, |
| 240 | pj_str_t *out) |
| 241 | { |
| 242 | register char *s = scanner->curptr; |
| 243 | |
| 244 | if (s >= scanner->end) { |
| 245 | pj_scan_syntax_err(scanner); |
| 246 | return -1; |
| 247 | } |
| 248 | |
| 249 | while (PJ_SCAN_CHECK_EOF(s) && !pj_cis_match( spec, *s)) |
| 250 | ++s; |
| 251 | |
| 252 | pj_strset3(out, scanner->curptr, s); |
| 253 | return *s; |
| 254 | } |
| 255 | |
| 256 | |
| 257 | PJ_DEF(void) pj_scan_get( pj_scanner *scanner, |
| 258 | const pj_cis_t *spec, pj_str_t *out) |
| 259 | { |
| 260 | register char *s = scanner->curptr; |
| 261 | |
| 262 | pj_assert(pj_cis_match(spec,0)==0); |
| 263 | |
| 264 | /* EOF is detected implicitly */ |
| 265 | if (!pj_cis_match(spec, *s)) { |
| 266 | pj_scan_syntax_err(scanner); |
| 267 | return; |
| 268 | } |
| 269 | |
| 270 | do { |
| 271 | ++s; |
| 272 | } while (pj_cis_match(spec, *s)); |
| 273 | /* No need to check EOF here (PJ_SCAN_CHECK_EOF(s)) because |
| 274 | * buffer is NULL terminated and pj_cis_match(spec,0) should be |
| 275 | * false. |
| 276 | */ |
| 277 | |
| 278 | pj_strset3(out, scanner->curptr, s); |
| 279 | |
| 280 | scanner->curptr = s; |
| 281 | |
| 282 | if (PJ_SCAN_IS_PROBABLY_SPACE(*s) && scanner->skip_ws) { |
| 283 | pj_scan_skip_whitespace(scanner); |
| 284 | } |
| 285 | } |
| 286 | |
| 287 | |
| 288 | PJ_DEF(void) pj_scan_get_unescape( pj_scanner *scanner, |
| 289 | const pj_cis_t *spec, pj_str_t *out) |
| 290 | { |
| 291 | register char *s = scanner->curptr; |
| 292 | char *dst = s; |
| 293 | |
| 294 | pj_assert(pj_cis_match(spec,0)==0); |
| 295 | |
| 296 | /* Must not match character '%' */ |
| 297 | pj_assert(pj_cis_match(spec,'%')==0); |
| 298 | |
| 299 | /* EOF is detected implicitly */ |
| 300 | if (!pj_cis_match(spec, *s) && *s != '%') { |
| 301 | pj_scan_syntax_err(scanner); |
| 302 | return; |
| 303 | } |
| 304 | |
| 305 | out->ptr = s; |
| 306 | do { |
| 307 | if (*s == '%') { |
| 308 | if (s+3 <= scanner->end && pj_isxdigit(*(s+1)) && |
| 309 | pj_isxdigit(*(s+2))) |
| 310 | { |
| 311 | *dst = (pj_uint8_t) ((pj_hex_digit_to_val(*(s+1)) << 4) + |
| 312 | pj_hex_digit_to_val(*(s+2))); |
| 313 | ++dst; |
| 314 | s += 3; |
| 315 | } else { |
| 316 | *dst++ = *s++; |
| 317 | *dst++ = *s++; |
| 318 | break; |
| 319 | } |
| 320 | } |
| 321 | |
| 322 | if (pj_cis_match(spec, *s)) { |
| 323 | char *start = s; |
| 324 | do { |
| 325 | ++s; |
| 326 | } while (pj_cis_match(spec, *s)); |
| 327 | |
| 328 | if (dst != start) pj_memmove(dst, start, s-start); |
| 329 | dst += (s-start); |
| 330 | } |
| 331 | |
| 332 | } while (*s == '%'); |
| 333 | |
| 334 | scanner->curptr = s; |
| 335 | out->slen = (dst - out->ptr); |
| 336 | |
| 337 | if (PJ_SCAN_IS_PROBABLY_SPACE(*s) && scanner->skip_ws) { |
| 338 | pj_scan_skip_whitespace(scanner); |
| 339 | } |
| 340 | } |
| 341 | |
| 342 | |
| 343 | PJ_DEF(void) pj_scan_get_quote( pj_scanner *scanner, |
| 344 | int begin_quote, int end_quote, |
| 345 | pj_str_t *out) |
| 346 | { |
| 347 | char beg = (char)begin_quote; |
| 348 | char end = (char)end_quote; |
| 349 | pj_scan_get_quotes(scanner, &beg, &end, 1, out); |
| 350 | } |
| 351 | |
| 352 | PJ_DEF(void) pj_scan_get_quotes(pj_scanner *scanner, |
| 353 | const char *begin_quote, const char *end_quote, |
| 354 | int qsize, pj_str_t *out) |
| 355 | { |
| 356 | register char *s = scanner->curptr; |
| 357 | int qpair = -1; |
| 358 | int i; |
| 359 | |
| 360 | pj_assert(qsize > 0); |
| 361 | |
| 362 | /* Check and eat the begin_quote. */ |
| 363 | for (i = 0; i < qsize; ++i) { |
| 364 | if (*s == begin_quote[i]) { |
| 365 | qpair = i; |
| 366 | break; |
| 367 | } |
| 368 | } |
| 369 | if (qpair == -1) { |
| 370 | pj_scan_syntax_err(scanner); |
| 371 | return; |
| 372 | } |
| 373 | ++s; |
| 374 | |
| 375 | /* Loop until end_quote is found. |
| 376 | */ |
| 377 | do { |
| 378 | /* loop until end_quote is found. */ |
| 379 | while (PJ_SCAN_CHECK_EOF(s) && *s != '\n' && *s != end_quote[qpair]) { |
| 380 | ++s; |
| 381 | } |
| 382 | |
| 383 | /* check that no backslash character precedes the end_quote. */ |
| 384 | if (*s == end_quote[qpair]) { |
| 385 | if (*(s-1) == '\\') { |
| 386 | char *q = s-2; |
| 387 | char *r = s-2; |
| 388 | |
| 389 | while (r != scanner->begin && *r == '\\') { |
| 390 | --r; |
| 391 | } |
| 392 | /* break from main loop if we have odd number of backslashes */ |
| 393 | if (((unsigned)(q-r) & 0x01) == 1) { |
| 394 | break; |
| 395 | } |
| 396 | ++s; |
| 397 | } else { |
| 398 | /* end_quote is not preceeded by backslash. break now. */ |
| 399 | break; |
| 400 | } |
| 401 | } else { |
| 402 | /* loop ended by non-end_quote character. break now. */ |
| 403 | break; |
| 404 | } |
| 405 | } while (1); |
| 406 | |
| 407 | /* Check and eat the end quote. */ |
| 408 | if (*s != end_quote[qpair]) { |
| 409 | pj_scan_syntax_err(scanner); |
| 410 | return; |
| 411 | } |
| 412 | ++s; |
| 413 | |
| 414 | pj_strset3(out, scanner->curptr, s); |
| 415 | |
| 416 | scanner->curptr = s; |
| 417 | |
| 418 | if (PJ_SCAN_IS_PROBABLY_SPACE(*s) && scanner->skip_ws) { |
| 419 | pj_scan_skip_whitespace(scanner); |
| 420 | } |
| 421 | } |
| 422 | |
| 423 | |
| 424 | PJ_DEF(void) pj_scan_get_n( pj_scanner *scanner, |
| 425 | unsigned N, pj_str_t *out) |
| 426 | { |
| 427 | if (scanner->curptr + N > scanner->end) { |
| 428 | pj_scan_syntax_err(scanner); |
| 429 | return; |
| 430 | } |
| 431 | |
| 432 | pj_strset(out, scanner->curptr, N); |
| 433 | |
| 434 | scanner->curptr += N; |
| 435 | |
| 436 | if (PJ_SCAN_IS_PROBABLY_SPACE(*scanner->curptr) && scanner->skip_ws) { |
| 437 | pj_scan_skip_whitespace(scanner); |
| 438 | } |
| 439 | } |
| 440 | |
| 441 | |
| 442 | PJ_DEF(int) pj_scan_get_char( pj_scanner *scanner ) |
| 443 | { |
| 444 | int chr = *scanner->curptr; |
| 445 | |
| 446 | if (!chr) { |
| 447 | pj_scan_syntax_err(scanner); |
| 448 | return 0; |
| 449 | } |
| 450 | |
| 451 | ++scanner->curptr; |
| 452 | |
| 453 | if (PJ_SCAN_IS_PROBABLY_SPACE(*scanner->curptr) && scanner->skip_ws) { |
| 454 | pj_scan_skip_whitespace(scanner); |
| 455 | } |
| 456 | return chr; |
| 457 | } |
| 458 | |
| 459 | |
| 460 | PJ_DEF(void) pj_scan_get_newline( pj_scanner *scanner ) |
| 461 | { |
| 462 | if (!PJ_SCAN_IS_NEWLINE(*scanner->curptr)) { |
| 463 | pj_scan_syntax_err(scanner); |
| 464 | return; |
| 465 | } |
| 466 | |
| 467 | if (*scanner->curptr == '\r') { |
| 468 | ++scanner->curptr; |
| 469 | } |
| 470 | if (*scanner->curptr == '\n') { |
| 471 | ++scanner->curptr; |
| 472 | } |
| 473 | |
| 474 | ++scanner->line; |
| 475 | scanner->start_line = scanner->curptr; |
| 476 | |
| 477 | /** |
| 478 | * This probably is a bug, see PROTOS test #2480. |
| 479 | * This would cause scanner to incorrectly eat two new lines, e.g. |
| 480 | * when parsing: |
| 481 | * |
| 482 | * Content-Length: 120\r\n |
| 483 | * \r\n |
| 484 | * <space><space><space>... |
| 485 | * |
| 486 | * When pj_scan_get_newline() is called to parse the first newline |
| 487 | * in the Content-Length header, it will eat the second newline |
| 488 | * too because it thinks that it's a header continuation. |
| 489 | * |
| 490 | * if (PJ_SCAN_IS_PROBABLY_SPACE(*scanner->curptr) && scanner->skip_ws) { |
| 491 | * pj_scan_skip_whitespace(scanner); |
| 492 | * } |
| 493 | */ |
| 494 | } |
| 495 | |
| 496 | |
| 497 | PJ_DEF(void) pj_scan_get_until( pj_scanner *scanner, |
| 498 | const pj_cis_t *spec, pj_str_t *out) |
| 499 | { |
| 500 | register char *s = scanner->curptr; |
| 501 | |
| 502 | if (s >= scanner->end) { |
| 503 | pj_scan_syntax_err(scanner); |
| 504 | return; |
| 505 | } |
| 506 | |
| 507 | while (PJ_SCAN_CHECK_EOF(s) && !pj_cis_match(spec, *s)) { |
| 508 | ++s; |
| 509 | } |
| 510 | |
| 511 | pj_strset3(out, scanner->curptr, s); |
| 512 | |
| 513 | scanner->curptr = s; |
| 514 | |
| 515 | if (PJ_SCAN_IS_PROBABLY_SPACE(*s) && scanner->skip_ws) { |
| 516 | pj_scan_skip_whitespace(scanner); |
| 517 | } |
| 518 | } |
| 519 | |
| 520 | |
| 521 | PJ_DEF(void) pj_scan_get_until_ch( pj_scanner *scanner, |
| 522 | int until_char, pj_str_t *out) |
| 523 | { |
| 524 | register char *s = scanner->curptr; |
| 525 | |
| 526 | if (s >= scanner->end) { |
| 527 | pj_scan_syntax_err(scanner); |
| 528 | return; |
| 529 | } |
| 530 | |
| 531 | while (PJ_SCAN_CHECK_EOF(s) && *s != until_char) { |
| 532 | ++s; |
| 533 | } |
| 534 | |
| 535 | pj_strset3(out, scanner->curptr, s); |
| 536 | |
| 537 | scanner->curptr = s; |
| 538 | |
| 539 | if (PJ_SCAN_IS_PROBABLY_SPACE(*s) && scanner->skip_ws) { |
| 540 | pj_scan_skip_whitespace(scanner); |
| 541 | } |
| 542 | } |
| 543 | |
| 544 | |
| 545 | PJ_DEF(void) pj_scan_get_until_chr( pj_scanner *scanner, |
| 546 | const char *until_spec, pj_str_t *out) |
| 547 | { |
| 548 | register char *s = scanner->curptr; |
| 549 | pj_size_t speclen; |
| 550 | |
| 551 | if (s >= scanner->end) { |
| 552 | pj_scan_syntax_err(scanner); |
| 553 | return; |
| 554 | } |
| 555 | |
| 556 | speclen = strlen(until_spec); |
| 557 | while (PJ_SCAN_CHECK_EOF(s) && !memchr(until_spec, *s, speclen)) { |
| 558 | ++s; |
| 559 | } |
| 560 | |
| 561 | pj_strset3(out, scanner->curptr, s); |
| 562 | |
| 563 | scanner->curptr = s; |
| 564 | |
| 565 | if (PJ_SCAN_IS_PROBABLY_SPACE(*s) && scanner->skip_ws) { |
| 566 | pj_scan_skip_whitespace(scanner); |
| 567 | } |
| 568 | } |
| 569 | |
| 570 | PJ_DEF(void) pj_scan_advance_n( pj_scanner *scanner, |
| 571 | unsigned N, pj_bool_t skip_ws) |
| 572 | { |
| 573 | if (scanner->curptr + N > scanner->end) { |
| 574 | pj_scan_syntax_err(scanner); |
| 575 | return; |
| 576 | } |
| 577 | |
| 578 | scanner->curptr += N; |
| 579 | |
| 580 | if (PJ_SCAN_IS_PROBABLY_SPACE(*scanner->curptr) && skip_ws) { |
| 581 | pj_scan_skip_whitespace(scanner); |
| 582 | } |
| 583 | } |
| 584 | |
| 585 | |
| 586 | PJ_DEF(int) pj_scan_strcmp( pj_scanner *scanner, const char *s, int len) |
| 587 | { |
| 588 | if (scanner->curptr + len > scanner->end) { |
| 589 | pj_scan_syntax_err(scanner); |
| 590 | return -1; |
| 591 | } |
| 592 | return strncmp(scanner->curptr, s, len); |
| 593 | } |
| 594 | |
| 595 | |
| 596 | PJ_DEF(int) pj_scan_stricmp( pj_scanner *scanner, const char *s, int len) |
| 597 | { |
| 598 | if (scanner->curptr + len > scanner->end) { |
| 599 | pj_scan_syntax_err(scanner); |
| 600 | return -1; |
| 601 | } |
| 602 | return pj_ansi_strnicmp(scanner->curptr, s, len); |
| 603 | } |
| 604 | |
| 605 | PJ_DEF(int) pj_scan_stricmp_alnum( pj_scanner *scanner, const char *s, |
| 606 | int len) |
| 607 | { |
| 608 | if (scanner->curptr + len > scanner->end) { |
| 609 | pj_scan_syntax_err(scanner); |
| 610 | return -1; |
| 611 | } |
| 612 | return strnicmp_alnum(scanner->curptr, s, len); |
| 613 | } |
| 614 | |
| 615 | PJ_DEF(void) pj_scan_save_state( const pj_scanner *scanner, |
| 616 | pj_scan_state *state) |
| 617 | { |
| 618 | state->curptr = scanner->curptr; |
| 619 | state->line = scanner->line; |
| 620 | state->start_line = scanner->start_line; |
| 621 | } |
| 622 | |
| 623 | |
| 624 | PJ_DEF(void) pj_scan_restore_state( pj_scanner *scanner, |
| 625 | pj_scan_state *state) |
| 626 | { |
| 627 | scanner->curptr = state->curptr; |
| 628 | scanner->line = state->line; |
| 629 | scanner->start_line = state->start_line; |
| 630 | } |
| 631 | |
| 632 | |