Elliott Hughes | 9bc971b | 2018-07-27 13:23:14 -0700 | [diff] [blame] | 1 | /************************************************* |
| 2 | * Perl-Compatible Regular Expressions * |
| 3 | *************************************************/ |
| 4 | |
| 5 | /* PCRE is a library of functions to support regular expressions whose syntax |
| 6 | and semantics are as close as possible to those of the Perl 5 language. |
| 7 | |
| 8 | Written by Philip Hazel |
| 9 | Original API code Copyright (c) 1997-2012 University of Cambridge |
Elliott Hughes | 653c210 | 2019-01-09 15:41:36 -0800 | [diff] [blame^] | 10 | New API code Copyright (c) 2016-2018 University of Cambridge |
Elliott Hughes | 9bc971b | 2018-07-27 13:23:14 -0700 | [diff] [blame] | 11 | |
| 12 | ----------------------------------------------------------------------------- |
| 13 | Redistribution and use in source and binary forms, with or without |
| 14 | modification, are permitted provided that the following conditions are met: |
| 15 | |
| 16 | * Redistributions of source code must retain the above copyright notice, |
| 17 | this list of conditions and the following disclaimer. |
| 18 | |
| 19 | * Redistributions in binary form must reproduce the above copyright |
| 20 | notice, this list of conditions and the following disclaimer in the |
| 21 | documentation and/or other materials provided with the distribution. |
| 22 | |
| 23 | * Neither the name of the University of Cambridge nor the names of its |
| 24 | contributors may be used to endorse or promote products derived from |
| 25 | this software without specific prior written permission. |
| 26 | |
| 27 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 28 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 29 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 30 | ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
| 31 | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 32 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 33 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 34 | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 35 | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 36 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 37 | POSSIBILITY OF SUCH DAMAGE. |
| 38 | ----------------------------------------------------------------------------- |
| 39 | */ |
| 40 | |
| 41 | |
| 42 | #ifdef HAVE_CONFIG_H |
| 43 | #include "config.h" |
| 44 | #endif |
| 45 | |
| 46 | #include "pcre2_internal.h" |
| 47 | |
| 48 | #define TYPE_OPTIONS (PCRE2_CONVERT_GLOB| \ |
| 49 | PCRE2_CONVERT_POSIX_BASIC|PCRE2_CONVERT_POSIX_EXTENDED) |
| 50 | |
| 51 | #define ALL_OPTIONS (PCRE2_CONVERT_UTF|PCRE2_CONVERT_NO_UTF_CHECK| \ |
| 52 | PCRE2_CONVERT_GLOB_NO_WILD_SEPARATOR| \ |
| 53 | PCRE2_CONVERT_GLOB_NO_STARSTAR| \ |
| 54 | TYPE_OPTIONS) |
| 55 | |
| 56 | #define DUMMY_BUFFER_SIZE 100 |
| 57 | |
| 58 | /* Generated pattern fragments */ |
| 59 | |
| 60 | #define STR_BACKSLASH_A STR_BACKSLASH STR_A |
| 61 | #define STR_BACKSLASH_z STR_BACKSLASH STR_z |
| 62 | #define STR_COLON_RIGHT_SQUARE_BRACKET STR_COLON STR_RIGHT_SQUARE_BRACKET |
| 63 | #define STR_DOT_STAR_LOOKBEHIND STR_DOT STR_ASTERISK STR_LEFT_PARENTHESIS STR_QUESTION_MARK STR_LESS_THAN_SIGN STR_EQUALS_SIGN |
| 64 | #define STR_LOOKAHEAD_NOT_DOT STR_LEFT_PARENTHESIS STR_QUESTION_MARK STR_EXCLAMATION_MARK STR_BACKSLASH STR_DOT STR_RIGHT_PARENTHESIS |
| 65 | #define STR_QUERY_s STR_LEFT_PARENTHESIS STR_QUESTION_MARK STR_s STR_RIGHT_PARENTHESIS |
| 66 | #define STR_STAR_NUL STR_LEFT_PARENTHESIS STR_ASTERISK STR_N STR_U STR_L STR_RIGHT_PARENTHESIS |
| 67 | |
| 68 | /* States for range and POSIX processing */ |
| 69 | |
| 70 | enum { RANGE_NOT_STARTED, RANGE_STARTING, RANGE_STARTED }; |
| 71 | enum { POSIX_START_REGEX, POSIX_ANCHORED, POSIX_NOT_BRACKET, |
| 72 | POSIX_CLASS_NOT_STARTED, POSIX_CLASS_STARTING, POSIX_CLASS_STARTED }; |
| 73 | |
| 74 | /* Macro to add a character string to the output buffer, checking for overflow. */ |
| 75 | |
| 76 | #define PUTCHARS(string) \ |
| 77 | { \ |
| 78 | for (s = (char *)(string); *s != 0; s++) \ |
| 79 | { \ |
| 80 | if (p >= endp) return PCRE2_ERROR_NOMEMORY; \ |
| 81 | *p++ = *s; \ |
| 82 | } \ |
| 83 | } |
| 84 | |
| 85 | /* Literals that must be escaped: \ ? * + | . ^ $ { } [ ] ( ) */ |
| 86 | |
| 87 | static const char *pcre2_escaped_literals = |
| 88 | STR_BACKSLASH STR_QUESTION_MARK STR_ASTERISK STR_PLUS |
| 89 | STR_VERTICAL_LINE STR_DOT STR_CIRCUMFLEX_ACCENT STR_DOLLAR_SIGN |
| 90 | STR_LEFT_CURLY_BRACKET STR_RIGHT_CURLY_BRACKET |
| 91 | STR_LEFT_SQUARE_BRACKET STR_RIGHT_SQUARE_BRACKET |
| 92 | STR_LEFT_PARENTHESIS STR_RIGHT_PARENTHESIS; |
| 93 | |
| 94 | /* Recognized escaped metacharacters in POSIX basic patterns. */ |
| 95 | |
| 96 | static const char *posix_meta_escapes = |
| 97 | STR_LEFT_PARENTHESIS STR_RIGHT_PARENTHESIS |
| 98 | STR_LEFT_CURLY_BRACKET STR_RIGHT_CURLY_BRACKET |
| 99 | STR_1 STR_2 STR_3 STR_4 STR_5 STR_6 STR_7 STR_8 STR_9; |
| 100 | |
| 101 | |
| 102 | |
| 103 | /************************************************* |
| 104 | * Convert a POSIX pattern * |
| 105 | *************************************************/ |
| 106 | |
| 107 | /* This function handles both basic and extended POSIX patterns. |
| 108 | |
| 109 | Arguments: |
| 110 | pattype the pattern type |
| 111 | pattern the pattern |
| 112 | plength length in code units |
| 113 | utf TRUE if UTF |
| 114 | use_buffer where to put the output |
| 115 | use_length length of use_buffer |
| 116 | bufflenptr where to put the used length |
| 117 | dummyrun TRUE if a dummy run |
| 118 | ccontext the convert context |
| 119 | |
| 120 | Returns: 0 => success |
| 121 | !0 => error code |
| 122 | */ |
| 123 | |
| 124 | static int |
| 125 | convert_posix(uint32_t pattype, PCRE2_SPTR pattern, PCRE2_SIZE plength, |
| 126 | BOOL utf, PCRE2_UCHAR *use_buffer, PCRE2_SIZE use_length, |
| 127 | PCRE2_SIZE *bufflenptr, BOOL dummyrun, pcre2_convert_context *ccontext) |
| 128 | { |
| 129 | char *s; |
| 130 | PCRE2_SPTR posix = pattern; |
| 131 | PCRE2_UCHAR *p = use_buffer; |
| 132 | PCRE2_UCHAR *pp = p; |
| 133 | PCRE2_UCHAR *endp = p + use_length - 1; /* Allow for trailing zero */ |
| 134 | PCRE2_SIZE convlength = 0; |
| 135 | |
| 136 | uint32_t bracount = 0; |
| 137 | uint32_t posix_state = POSIX_START_REGEX; |
| 138 | uint32_t lastspecial = 0; |
| 139 | BOOL extended = (pattype & PCRE2_CONVERT_POSIX_EXTENDED) != 0; |
| 140 | BOOL nextisliteral = FALSE; |
| 141 | |
| 142 | (void)utf; /* Not used when Unicode not supported */ |
| 143 | (void)ccontext; /* Not currently used */ |
| 144 | |
| 145 | /* Initialize default for error offset as end of input. */ |
| 146 | |
| 147 | *bufflenptr = plength; |
| 148 | PUTCHARS(STR_STAR_NUL); |
| 149 | |
| 150 | /* Now scan the input. */ |
| 151 | |
| 152 | while (plength > 0) |
| 153 | { |
| 154 | uint32_t c, sc; |
| 155 | int clength = 1; |
| 156 | |
| 157 | /* Add in the length of the last item, then, if in the dummy run, pull the |
| 158 | pointer back to the start of the (temporary) buffer and then remember the |
| 159 | start of the next item. */ |
| 160 | |
| 161 | convlength += p - pp; |
| 162 | if (dummyrun) p = use_buffer; |
| 163 | pp = p; |
| 164 | |
| 165 | /* Pick up the next character */ |
| 166 | |
| 167 | #ifndef SUPPORT_UNICODE |
| 168 | c = *posix; |
| 169 | #else |
| 170 | GETCHARLENTEST(c, posix, clength); |
| 171 | #endif |
| 172 | posix += clength; |
| 173 | plength -= clength; |
| 174 | |
| 175 | sc = nextisliteral? 0 : c; |
| 176 | nextisliteral = FALSE; |
| 177 | |
| 178 | /* Handle a character within a class. */ |
| 179 | |
| 180 | if (posix_state >= POSIX_CLASS_NOT_STARTED) |
| 181 | { |
| 182 | if (c == CHAR_RIGHT_SQUARE_BRACKET) |
| 183 | { |
| 184 | PUTCHARS(STR_RIGHT_SQUARE_BRACKET); |
| 185 | posix_state = POSIX_NOT_BRACKET; |
| 186 | } |
| 187 | |
| 188 | /* Not the end of the class */ |
| 189 | |
| 190 | else |
| 191 | { |
| 192 | switch (posix_state) |
| 193 | { |
| 194 | case POSIX_CLASS_STARTED: |
| 195 | if (c <= 127 && islower(c)) break; /* Remain in started state */ |
| 196 | posix_state = POSIX_CLASS_NOT_STARTED; |
| 197 | if (c == CHAR_COLON && plength > 0 && |
| 198 | *posix == CHAR_RIGHT_SQUARE_BRACKET) |
| 199 | { |
| 200 | PUTCHARS(STR_COLON_RIGHT_SQUARE_BRACKET); |
| 201 | plength--; |
| 202 | posix++; |
| 203 | continue; /* With next character after :] */ |
| 204 | } |
| 205 | /* Fall through */ |
| 206 | |
| 207 | case POSIX_CLASS_NOT_STARTED: |
| 208 | if (c == CHAR_LEFT_SQUARE_BRACKET) |
| 209 | posix_state = POSIX_CLASS_STARTING; |
| 210 | break; |
| 211 | |
| 212 | case POSIX_CLASS_STARTING: |
| 213 | if (c == CHAR_COLON) posix_state = POSIX_CLASS_STARTED; |
| 214 | break; |
| 215 | } |
| 216 | |
| 217 | if (c == CHAR_BACKSLASH) PUTCHARS(STR_BACKSLASH); |
| 218 | if (p + clength > endp) return PCRE2_ERROR_NOMEMORY; |
| 219 | memcpy(p, posix - clength, CU2BYTES(clength)); |
| 220 | p += clength; |
| 221 | } |
| 222 | } |
| 223 | |
| 224 | /* Handle a character not within a class. */ |
| 225 | |
| 226 | else switch(sc) |
| 227 | { |
| 228 | case CHAR_LEFT_SQUARE_BRACKET: |
| 229 | PUTCHARS(STR_LEFT_SQUARE_BRACKET); |
| 230 | |
| 231 | #ifdef NEVER |
| 232 | /* We could handle special cases [[:<:]] and [[:>:]] (which PCRE does |
| 233 | support) but they are not part of POSIX 1003.1. */ |
| 234 | |
| 235 | if (plength >= 6) |
| 236 | { |
| 237 | if (posix[0] == CHAR_LEFT_SQUARE_BRACKET && |
| 238 | posix[1] == CHAR_COLON && |
| 239 | (posix[2] == CHAR_LESS_THAN_SIGN || |
| 240 | posix[2] == CHAR_GREATER_THAN_SIGN) && |
| 241 | posix[3] == CHAR_COLON && |
| 242 | posix[4] == CHAR_RIGHT_SQUARE_BRACKET && |
| 243 | posix[5] == CHAR_RIGHT_SQUARE_BRACKET) |
| 244 | { |
| 245 | if (p + 6 > endp) return PCRE2_ERROR_NOMEMORY; |
| 246 | memcpy(p, posix, CU2BYTES(6)); |
| 247 | p += 6; |
| 248 | posix += 6; |
| 249 | plength -= 6; |
| 250 | continue; /* With next character */ |
| 251 | } |
| 252 | } |
| 253 | #endif |
| 254 | |
| 255 | /* Handle start of "normal" character classes */ |
| 256 | |
| 257 | posix_state = POSIX_CLASS_NOT_STARTED; |
| 258 | |
| 259 | /* Handle ^ and ] as first characters */ |
| 260 | |
| 261 | if (plength > 0) |
| 262 | { |
| 263 | if (*posix == CHAR_CIRCUMFLEX_ACCENT) |
| 264 | { |
| 265 | posix++; |
| 266 | plength--; |
| 267 | PUTCHARS(STR_CIRCUMFLEX_ACCENT); |
| 268 | } |
| 269 | if (plength > 0 && *posix == CHAR_RIGHT_SQUARE_BRACKET) |
| 270 | { |
| 271 | posix++; |
| 272 | plength--; |
| 273 | PUTCHARS(STR_RIGHT_SQUARE_BRACKET); |
| 274 | } |
| 275 | } |
| 276 | break; |
| 277 | |
| 278 | case CHAR_BACKSLASH: |
| 279 | if (plength <= 0) return PCRE2_ERROR_END_BACKSLASH; |
| 280 | if (extended) nextisliteral = TRUE; else |
| 281 | { |
| 282 | if (*posix < 127 && strchr(posix_meta_escapes, *posix) != NULL) |
| 283 | { |
| 284 | if (isdigit(*posix)) PUTCHARS(STR_BACKSLASH); |
| 285 | if (p + 1 > endp) return PCRE2_ERROR_NOMEMORY; |
| 286 | lastspecial = *p++ = *posix++; |
| 287 | plength--; |
| 288 | } |
| 289 | else nextisliteral = TRUE; |
| 290 | } |
| 291 | break; |
| 292 | |
| 293 | case CHAR_RIGHT_PARENTHESIS: |
| 294 | if (!extended || bracount == 0) goto ESCAPE_LITERAL; |
| 295 | bracount--; |
| 296 | goto COPY_SPECIAL; |
| 297 | |
| 298 | case CHAR_LEFT_PARENTHESIS: |
| 299 | bracount++; |
| 300 | /* Fall through */ |
| 301 | |
| 302 | case CHAR_QUESTION_MARK: |
| 303 | case CHAR_PLUS: |
| 304 | case CHAR_LEFT_CURLY_BRACKET: |
| 305 | case CHAR_RIGHT_CURLY_BRACKET: |
| 306 | case CHAR_VERTICAL_LINE: |
| 307 | if (!extended) goto ESCAPE_LITERAL; |
| 308 | /* Fall through */ |
| 309 | |
| 310 | case CHAR_DOT: |
| 311 | case CHAR_DOLLAR_SIGN: |
| 312 | posix_state = POSIX_NOT_BRACKET; |
| 313 | COPY_SPECIAL: |
| 314 | lastspecial = c; |
| 315 | if (p + 1 > endp) return PCRE2_ERROR_NOMEMORY; |
| 316 | *p++ = c; |
| 317 | break; |
| 318 | |
| 319 | case CHAR_ASTERISK: |
| 320 | if (lastspecial != CHAR_ASTERISK) |
| 321 | { |
| 322 | if (!extended && (posix_state < POSIX_NOT_BRACKET || |
| 323 | lastspecial == CHAR_LEFT_PARENTHESIS)) |
| 324 | goto ESCAPE_LITERAL; |
| 325 | goto COPY_SPECIAL; |
| 326 | } |
| 327 | break; /* Ignore second and subsequent asterisks */ |
| 328 | |
| 329 | case CHAR_CIRCUMFLEX_ACCENT: |
| 330 | if (extended) goto COPY_SPECIAL; |
| 331 | if (posix_state == POSIX_START_REGEX || |
| 332 | lastspecial == CHAR_LEFT_PARENTHESIS) |
| 333 | { |
| 334 | posix_state = POSIX_ANCHORED; |
| 335 | goto COPY_SPECIAL; |
| 336 | } |
| 337 | /* Fall through */ |
| 338 | |
| 339 | default: |
| 340 | if (c < 128 && strchr(pcre2_escaped_literals, c) != NULL) |
| 341 | { |
| 342 | ESCAPE_LITERAL: |
| 343 | PUTCHARS(STR_BACKSLASH); |
| 344 | } |
| 345 | lastspecial = 0xff; /* Indicates nothing special */ |
| 346 | if (p + clength > endp) return PCRE2_ERROR_NOMEMORY; |
| 347 | memcpy(p, posix - clength, CU2BYTES(clength)); |
| 348 | p += clength; |
| 349 | posix_state = POSIX_NOT_BRACKET; |
| 350 | break; |
| 351 | } |
| 352 | } |
| 353 | |
| 354 | if (posix_state >= POSIX_CLASS_NOT_STARTED) |
| 355 | return PCRE2_ERROR_MISSING_SQUARE_BRACKET; |
| 356 | convlength += p - pp; /* Final segment */ |
| 357 | *bufflenptr = convlength; |
| 358 | *p++ = 0; |
| 359 | return 0; |
| 360 | } |
| 361 | |
| 362 | |
| 363 | /************************************************* |
| 364 | * Convert a glob pattern * |
| 365 | *************************************************/ |
| 366 | |
| 367 | /* Context for writing the output into a buffer. */ |
| 368 | |
| 369 | typedef struct pcre2_output_context { |
| 370 | PCRE2_UCHAR *output; /* current output position */ |
| 371 | PCRE2_SPTR output_end; /* output end */ |
| 372 | PCRE2_SIZE output_size; /* size of the output */ |
| 373 | uint8_t out_str[8]; /* string copied to the output */ |
| 374 | } pcre2_output_context; |
| 375 | |
| 376 | |
| 377 | /* Write a character into the output. |
| 378 | |
| 379 | Arguments: |
| 380 | out output context |
| 381 | chr the next character |
| 382 | */ |
| 383 | |
| 384 | static void |
| 385 | convert_glob_write(pcre2_output_context *out, PCRE2_UCHAR chr) |
| 386 | { |
| 387 | out->output_size++; |
| 388 | |
| 389 | if (out->output < out->output_end) |
| 390 | *out->output++ = chr; |
| 391 | } |
| 392 | |
| 393 | |
| 394 | /* Write a string into the output. |
| 395 | |
| 396 | Arguments: |
| 397 | out output context |
| 398 | length length of out->out_str |
| 399 | */ |
| 400 | |
| 401 | static void |
| 402 | convert_glob_write_str(pcre2_output_context *out, PCRE2_SIZE length) |
| 403 | { |
| 404 | uint8_t *out_str = out->out_str; |
| 405 | PCRE2_UCHAR *output = out->output; |
| 406 | PCRE2_SPTR output_end = out->output_end; |
| 407 | PCRE2_SIZE output_size = out->output_size; |
| 408 | |
| 409 | do |
| 410 | { |
| 411 | output_size++; |
| 412 | |
| 413 | if (output < output_end) |
| 414 | *output++ = *out_str++; |
| 415 | } |
| 416 | while (--length != 0); |
| 417 | |
| 418 | out->output = output; |
| 419 | out->output_size = output_size; |
| 420 | } |
| 421 | |
| 422 | |
| 423 | /* Prints the separator into the output. |
| 424 | |
| 425 | Arguments: |
| 426 | out output context |
| 427 | separator glob separator |
| 428 | with_escape backslash is needed before separator |
| 429 | */ |
| 430 | |
| 431 | static void |
| 432 | convert_glob_print_separator(pcre2_output_context *out, |
| 433 | PCRE2_UCHAR separator, BOOL with_escape) |
| 434 | { |
| 435 | if (with_escape) |
| 436 | convert_glob_write(out, CHAR_BACKSLASH); |
| 437 | |
| 438 | convert_glob_write(out, separator); |
| 439 | } |
| 440 | |
| 441 | |
| 442 | /* Prints a wildcard into the output. |
| 443 | |
| 444 | Arguments: |
| 445 | out output context |
| 446 | separator glob separator |
| 447 | with_escape backslash is needed before separator |
| 448 | */ |
| 449 | |
| 450 | static void |
| 451 | convert_glob_print_wildcard(pcre2_output_context *out, |
| 452 | PCRE2_UCHAR separator, BOOL with_escape) |
| 453 | { |
| 454 | out->out_str[0] = CHAR_LEFT_SQUARE_BRACKET; |
| 455 | out->out_str[1] = CHAR_CIRCUMFLEX_ACCENT; |
| 456 | convert_glob_write_str(out, 2); |
| 457 | |
| 458 | convert_glob_print_separator(out, separator, with_escape); |
| 459 | |
| 460 | convert_glob_write(out, CHAR_RIGHT_SQUARE_BRACKET); |
| 461 | } |
| 462 | |
| 463 | |
| 464 | /* Parse a posix class. |
| 465 | |
| 466 | Arguments: |
| 467 | from starting point of scanning the range |
| 468 | pattern_end end of pattern |
| 469 | out output context |
| 470 | |
| 471 | Returns: >0 => class index |
| 472 | 0 => malformed class |
| 473 | */ |
| 474 | |
| 475 | static int |
| 476 | convert_glob_parse_class(PCRE2_SPTR *from, PCRE2_SPTR pattern_end, |
| 477 | pcre2_output_context *out) |
| 478 | { |
| 479 | static const char *posix_classes = "alnum:alpha:ascii:blank:cntrl:digit:" |
| 480 | "graph:lower:print:punct:space:upper:word:xdigit:"; |
| 481 | PCRE2_SPTR start = *from + 1; |
| 482 | PCRE2_SPTR pattern = start; |
| 483 | const char *class_ptr; |
| 484 | PCRE2_UCHAR c; |
| 485 | int class_index; |
| 486 | |
| 487 | while (TRUE) |
| 488 | { |
| 489 | if (pattern >= pattern_end) return 0; |
| 490 | |
| 491 | c = *pattern++; |
| 492 | |
| 493 | if (c < CHAR_a || c > CHAR_z) break; |
| 494 | } |
| 495 | |
| 496 | if (c != CHAR_COLON || pattern >= pattern_end || |
| 497 | *pattern != CHAR_RIGHT_SQUARE_BRACKET) |
| 498 | return 0; |
| 499 | |
| 500 | class_ptr = posix_classes; |
| 501 | class_index = 1; |
| 502 | |
| 503 | while (TRUE) |
| 504 | { |
| 505 | if (*class_ptr == CHAR_NUL) return 0; |
| 506 | |
| 507 | pattern = start; |
| 508 | |
| 509 | while (*pattern == (PCRE2_UCHAR) *class_ptr) |
| 510 | { |
| 511 | if (*pattern == CHAR_COLON) |
| 512 | { |
| 513 | pattern += 2; |
| 514 | start -= 2; |
| 515 | |
| 516 | do convert_glob_write(out, *start++); while (start < pattern); |
| 517 | |
| 518 | *from = pattern; |
| 519 | return class_index; |
| 520 | } |
| 521 | pattern++; |
| 522 | class_ptr++; |
| 523 | } |
| 524 | |
| 525 | while (*class_ptr != CHAR_COLON) class_ptr++; |
| 526 | class_ptr++; |
| 527 | class_index++; |
| 528 | } |
| 529 | } |
| 530 | |
| 531 | /* Checks whether the character is in the class. |
| 532 | |
| 533 | Arguments: |
| 534 | class_index class index |
| 535 | c character |
| 536 | |
| 537 | Returns: !0 => character is found in the class |
| 538 | 0 => otherwise |
| 539 | */ |
| 540 | |
| 541 | static BOOL |
| 542 | convert_glob_char_in_class(int class_index, PCRE2_UCHAR c) |
| 543 | { |
| 544 | switch (class_index) |
| 545 | { |
| 546 | case 1: return isalnum(c); |
| 547 | case 2: return isalpha(c); |
| 548 | case 3: return 1; |
| 549 | case 4: return c == CHAR_HT || c == CHAR_SPACE; |
| 550 | case 5: return iscntrl(c); |
| 551 | case 6: return isdigit(c); |
| 552 | case 7: return isgraph(c); |
| 553 | case 8: return islower(c); |
| 554 | case 9: return isprint(c); |
| 555 | case 10: return ispunct(c); |
| 556 | case 11: return isspace(c); |
| 557 | case 12: return isupper(c); |
| 558 | case 13: return isalnum(c) || c == CHAR_UNDERSCORE; |
| 559 | default: return isxdigit(c); |
| 560 | } |
| 561 | } |
| 562 | |
| 563 | /* Parse a range of characters. |
| 564 | |
| 565 | Arguments: |
| 566 | from starting point of scanning the range |
| 567 | pattern_end end of pattern |
| 568 | out output context |
| 569 | separator glob separator |
| 570 | with_escape backslash is needed before separator |
| 571 | |
| 572 | Returns: 0 => success |
| 573 | !0 => error code |
| 574 | */ |
| 575 | |
| 576 | static int |
| 577 | convert_glob_parse_range(PCRE2_SPTR *from, PCRE2_SPTR pattern_end, |
| 578 | pcre2_output_context *out, BOOL utf, PCRE2_UCHAR separator, |
| 579 | BOOL with_escape, PCRE2_UCHAR escape, BOOL no_wildsep) |
| 580 | { |
| 581 | BOOL is_negative = FALSE; |
| 582 | BOOL separator_seen = FALSE; |
| 583 | BOOL has_prev_c; |
| 584 | PCRE2_SPTR pattern = *from; |
| 585 | PCRE2_SPTR char_start = NULL; |
| 586 | uint32_t c, prev_c; |
| 587 | int len, class_index; |
| 588 | |
| 589 | (void)utf; /* Avoid compiler warning. */ |
| 590 | |
| 591 | if (pattern >= pattern_end) |
| 592 | { |
| 593 | *from = pattern; |
| 594 | return PCRE2_ERROR_MISSING_SQUARE_BRACKET; |
| 595 | } |
| 596 | |
| 597 | if (*pattern == CHAR_EXCLAMATION_MARK |
| 598 | || *pattern == CHAR_CIRCUMFLEX_ACCENT) |
| 599 | { |
| 600 | pattern++; |
| 601 | |
| 602 | if (pattern >= pattern_end) |
| 603 | { |
| 604 | *from = pattern; |
| 605 | return PCRE2_ERROR_MISSING_SQUARE_BRACKET; |
| 606 | } |
| 607 | |
| 608 | is_negative = TRUE; |
| 609 | |
| 610 | out->out_str[0] = CHAR_LEFT_SQUARE_BRACKET; |
| 611 | out->out_str[1] = CHAR_CIRCUMFLEX_ACCENT; |
| 612 | len = 2; |
| 613 | |
| 614 | if (!no_wildsep) |
| 615 | { |
| 616 | if (with_escape) |
| 617 | { |
| 618 | out->out_str[len] = CHAR_BACKSLASH; |
| 619 | len++; |
| 620 | } |
| 621 | out->out_str[len] = (uint8_t) separator; |
| 622 | } |
| 623 | |
| 624 | convert_glob_write_str(out, len + 1); |
| 625 | } |
| 626 | else |
| 627 | convert_glob_write(out, CHAR_LEFT_SQUARE_BRACKET); |
| 628 | |
| 629 | has_prev_c = FALSE; |
| 630 | prev_c = 0; |
| 631 | |
| 632 | if (*pattern == CHAR_RIGHT_SQUARE_BRACKET) |
| 633 | { |
| 634 | out->out_str[0] = CHAR_BACKSLASH; |
| 635 | out->out_str[1] = CHAR_RIGHT_SQUARE_BRACKET; |
| 636 | convert_glob_write_str(out, 2); |
| 637 | has_prev_c = TRUE; |
| 638 | prev_c = CHAR_RIGHT_SQUARE_BRACKET; |
| 639 | pattern++; |
| 640 | } |
| 641 | |
| 642 | while (pattern < pattern_end) |
| 643 | { |
| 644 | char_start = pattern; |
| 645 | GETCHARINCTEST(c, pattern); |
| 646 | |
| 647 | if (c == CHAR_RIGHT_SQUARE_BRACKET) |
| 648 | { |
| 649 | convert_glob_write(out, c); |
| 650 | |
| 651 | if (!is_negative && !no_wildsep && separator_seen) |
| 652 | { |
| 653 | out->out_str[0] = CHAR_LEFT_PARENTHESIS; |
| 654 | out->out_str[1] = CHAR_QUESTION_MARK; |
| 655 | out->out_str[2] = CHAR_LESS_THAN_SIGN; |
| 656 | out->out_str[3] = CHAR_EXCLAMATION_MARK; |
| 657 | convert_glob_write_str(out, 4); |
| 658 | |
| 659 | convert_glob_print_separator(out, separator, with_escape); |
| 660 | convert_glob_write(out, CHAR_RIGHT_PARENTHESIS); |
| 661 | } |
| 662 | |
| 663 | *from = pattern; |
| 664 | return 0; |
| 665 | } |
| 666 | |
| 667 | if (pattern >= pattern_end) break; |
| 668 | |
| 669 | if (c == CHAR_LEFT_SQUARE_BRACKET && *pattern == CHAR_COLON) |
| 670 | { |
| 671 | *from = pattern; |
| 672 | class_index = convert_glob_parse_class(from, pattern_end, out); |
| 673 | |
| 674 | if (class_index != 0) |
| 675 | { |
| 676 | pattern = *from; |
| 677 | |
| 678 | has_prev_c = FALSE; |
| 679 | prev_c = 0; |
| 680 | |
| 681 | if (!is_negative && |
| 682 | convert_glob_char_in_class (class_index, separator)) |
| 683 | separator_seen = TRUE; |
| 684 | continue; |
| 685 | } |
| 686 | } |
| 687 | else if (c == CHAR_MINUS && has_prev_c && |
| 688 | *pattern != CHAR_RIGHT_SQUARE_BRACKET) |
| 689 | { |
| 690 | convert_glob_write(out, CHAR_MINUS); |
| 691 | |
| 692 | char_start = pattern; |
| 693 | GETCHARINCTEST(c, pattern); |
| 694 | |
| 695 | if (pattern >= pattern_end) break; |
| 696 | |
| 697 | if (escape != 0 && c == escape) |
| 698 | { |
| 699 | char_start = pattern; |
| 700 | GETCHARINCTEST(c, pattern); |
| 701 | } |
| 702 | else if (c == CHAR_LEFT_SQUARE_BRACKET && *pattern == CHAR_COLON) |
| 703 | { |
| 704 | *from = pattern; |
| 705 | return PCRE2_ERROR_CONVERT_SYNTAX; |
| 706 | } |
| 707 | |
| 708 | if (prev_c > c) |
| 709 | { |
| 710 | *from = pattern; |
| 711 | return PCRE2_ERROR_CONVERT_SYNTAX; |
| 712 | } |
| 713 | |
| 714 | if (prev_c < separator && separator < c) separator_seen = TRUE; |
| 715 | |
| 716 | has_prev_c = FALSE; |
| 717 | prev_c = 0; |
| 718 | } |
| 719 | else |
| 720 | { |
| 721 | if (escape != 0 && c == escape) |
| 722 | { |
| 723 | char_start = pattern; |
| 724 | GETCHARINCTEST(c, pattern); |
| 725 | |
| 726 | if (pattern >= pattern_end) break; |
| 727 | } |
| 728 | |
| 729 | has_prev_c = TRUE; |
| 730 | prev_c = c; |
| 731 | } |
| 732 | |
| 733 | if (c == CHAR_LEFT_SQUARE_BRACKET || c == CHAR_RIGHT_SQUARE_BRACKET || |
| 734 | c == CHAR_BACKSLASH || c == CHAR_MINUS) |
| 735 | convert_glob_write(out, CHAR_BACKSLASH); |
| 736 | |
| 737 | if (c == separator) separator_seen = TRUE; |
| 738 | |
| 739 | do convert_glob_write(out, *char_start++); while (char_start < pattern); |
| 740 | } |
| 741 | |
| 742 | *from = pattern; |
| 743 | return PCRE2_ERROR_MISSING_SQUARE_BRACKET; |
| 744 | } |
| 745 | |
| 746 | |
| 747 | /* Prints a (*COMMIT) into the output. |
| 748 | |
| 749 | Arguments: |
| 750 | out output context |
| 751 | */ |
| 752 | |
| 753 | static void |
| 754 | convert_glob_print_commit(pcre2_output_context *out) |
| 755 | { |
| 756 | out->out_str[0] = CHAR_LEFT_PARENTHESIS; |
| 757 | out->out_str[1] = CHAR_ASTERISK; |
| 758 | out->out_str[2] = CHAR_C; |
| 759 | out->out_str[3] = CHAR_O; |
| 760 | out->out_str[4] = CHAR_M; |
| 761 | out->out_str[5] = CHAR_M; |
| 762 | out->out_str[6] = CHAR_I; |
| 763 | out->out_str[7] = CHAR_T; |
| 764 | convert_glob_write_str(out, 8); |
| 765 | convert_glob_write(out, CHAR_RIGHT_PARENTHESIS); |
| 766 | } |
| 767 | |
| 768 | |
| 769 | /* Bash glob converter. |
| 770 | |
| 771 | Arguments: |
| 772 | pattype the pattern type |
| 773 | pattern the pattern |
| 774 | plength length in code units |
| 775 | utf TRUE if UTF |
| 776 | use_buffer where to put the output |
| 777 | use_length length of use_buffer |
| 778 | bufflenptr where to put the used length |
| 779 | dummyrun TRUE if a dummy run |
| 780 | ccontext the convert context |
| 781 | |
| 782 | Returns: 0 => success |
| 783 | !0 => error code |
| 784 | */ |
| 785 | |
| 786 | static int |
| 787 | convert_glob(uint32_t options, PCRE2_SPTR pattern, PCRE2_SIZE plength, |
| 788 | BOOL utf, PCRE2_UCHAR *use_buffer, PCRE2_SIZE use_length, |
| 789 | PCRE2_SIZE *bufflenptr, BOOL dummyrun, pcre2_convert_context *ccontext) |
| 790 | { |
| 791 | pcre2_output_context out; |
| 792 | PCRE2_SPTR pattern_start = pattern; |
| 793 | PCRE2_SPTR pattern_end = pattern + plength; |
| 794 | PCRE2_UCHAR separator = ccontext->glob_separator; |
| 795 | PCRE2_UCHAR escape = ccontext->glob_escape; |
| 796 | PCRE2_UCHAR c; |
| 797 | BOOL no_wildsep = (options & PCRE2_CONVERT_GLOB_NO_WILD_SEPARATOR) != 0; |
| 798 | BOOL no_starstar = (options & PCRE2_CONVERT_GLOB_NO_STARSTAR) != 0; |
| 799 | BOOL in_atomic = FALSE; |
| 800 | BOOL after_starstar = FALSE; |
| 801 | BOOL no_slash_z = FALSE; |
| 802 | BOOL with_escape, is_start, after_separator; |
| 803 | int result = 0; |
| 804 | |
| 805 | (void)utf; /* Avoid compiler warning. */ |
| 806 | |
| 807 | #ifdef SUPPORT_UNICODE |
| 808 | if (utf && (separator >= 128 || escape >= 128)) |
| 809 | { |
| 810 | /* Currently only ASCII characters are supported. */ |
| 811 | *bufflenptr = 0; |
| 812 | return PCRE2_ERROR_CONVERT_SYNTAX; |
| 813 | } |
| 814 | #endif |
| 815 | |
| 816 | with_escape = strchr(pcre2_escaped_literals, separator) != NULL; |
| 817 | |
| 818 | /* Initialize default for error offset as end of input. */ |
| 819 | out.output = use_buffer; |
| 820 | out.output_end = use_buffer + use_length; |
| 821 | out.output_size = 0; |
| 822 | |
| 823 | out.out_str[0] = CHAR_LEFT_PARENTHESIS; |
| 824 | out.out_str[1] = CHAR_QUESTION_MARK; |
| 825 | out.out_str[2] = CHAR_s; |
| 826 | out.out_str[3] = CHAR_RIGHT_PARENTHESIS; |
| 827 | convert_glob_write_str(&out, 4); |
| 828 | |
| 829 | is_start = TRUE; |
| 830 | |
| 831 | if (pattern < pattern_end && pattern[0] == CHAR_ASTERISK) |
| 832 | { |
| 833 | if (no_wildsep) |
| 834 | is_start = FALSE; |
| 835 | else if (!no_starstar && pattern + 1 < pattern_end && |
| 836 | pattern[1] == CHAR_ASTERISK) |
| 837 | is_start = FALSE; |
| 838 | } |
| 839 | |
| 840 | if (is_start) |
| 841 | { |
| 842 | out.out_str[0] = CHAR_BACKSLASH; |
| 843 | out.out_str[1] = CHAR_A; |
| 844 | convert_glob_write_str(&out, 2); |
| 845 | } |
| 846 | |
| 847 | while (pattern < pattern_end) |
| 848 | { |
| 849 | c = *pattern++; |
| 850 | |
| 851 | if (c == CHAR_ASTERISK) |
| 852 | { |
| 853 | is_start = pattern == pattern_start + 1; |
| 854 | |
| 855 | if (in_atomic) |
| 856 | { |
| 857 | convert_glob_write(&out, CHAR_RIGHT_PARENTHESIS); |
| 858 | in_atomic = FALSE; |
| 859 | } |
| 860 | |
| 861 | if (!no_starstar && pattern < pattern_end && *pattern == CHAR_ASTERISK) |
| 862 | { |
| 863 | after_separator = is_start || (pattern[-2] == separator); |
| 864 | |
| 865 | do pattern++; while (pattern < pattern_end && |
| 866 | *pattern == CHAR_ASTERISK); |
| 867 | |
| 868 | if (pattern >= pattern_end) |
| 869 | { |
| 870 | no_slash_z = TRUE; |
| 871 | break; |
| 872 | } |
| 873 | |
| 874 | after_starstar = TRUE; |
| 875 | |
| 876 | if (after_separator && escape != 0 && *pattern == escape && |
| 877 | pattern + 1 < pattern_end && pattern[1] == separator) |
| 878 | pattern++; |
| 879 | |
| 880 | if (is_start) |
| 881 | { |
| 882 | if (*pattern != separator) continue; |
| 883 | |
| 884 | out.out_str[0] = CHAR_LEFT_PARENTHESIS; |
| 885 | out.out_str[1] = CHAR_QUESTION_MARK; |
| 886 | out.out_str[2] = CHAR_COLON; |
| 887 | out.out_str[3] = CHAR_BACKSLASH; |
| 888 | out.out_str[4] = CHAR_A; |
| 889 | out.out_str[5] = CHAR_VERTICAL_LINE; |
| 890 | convert_glob_write_str(&out, 6); |
| 891 | |
| 892 | convert_glob_print_separator(&out, separator, with_escape); |
| 893 | convert_glob_write(&out, CHAR_RIGHT_PARENTHESIS); |
| 894 | |
| 895 | pattern++; |
| 896 | continue; |
| 897 | } |
| 898 | |
| 899 | convert_glob_print_commit(&out); |
| 900 | |
| 901 | if (!after_separator || *pattern != separator) |
| 902 | { |
| 903 | out.out_str[0] = CHAR_DOT; |
| 904 | out.out_str[1] = CHAR_ASTERISK; |
| 905 | out.out_str[2] = CHAR_QUESTION_MARK; |
| 906 | convert_glob_write_str(&out, 3); |
| 907 | continue; |
| 908 | } |
| 909 | |
| 910 | out.out_str[0] = CHAR_LEFT_PARENTHESIS; |
| 911 | out.out_str[1] = CHAR_QUESTION_MARK; |
| 912 | out.out_str[2] = CHAR_COLON; |
| 913 | out.out_str[3] = CHAR_DOT; |
| 914 | out.out_str[4] = CHAR_ASTERISK; |
| 915 | out.out_str[5] = CHAR_QUESTION_MARK; |
| 916 | |
| 917 | convert_glob_write_str(&out, 6); |
| 918 | |
| 919 | convert_glob_print_separator(&out, separator, with_escape); |
| 920 | |
| 921 | out.out_str[0] = CHAR_RIGHT_PARENTHESIS; |
| 922 | out.out_str[1] = CHAR_QUESTION_MARK; |
| 923 | out.out_str[2] = CHAR_QUESTION_MARK; |
| 924 | convert_glob_write_str(&out, 3); |
| 925 | |
| 926 | pattern++; |
| 927 | continue; |
| 928 | } |
| 929 | |
| 930 | if (pattern < pattern_end && *pattern == CHAR_ASTERISK) |
| 931 | { |
| 932 | do pattern++; while (pattern < pattern_end && |
| 933 | *pattern == CHAR_ASTERISK); |
| 934 | } |
| 935 | |
| 936 | if (no_wildsep) |
| 937 | { |
| 938 | if (pattern >= pattern_end) |
| 939 | { |
| 940 | no_slash_z = TRUE; |
| 941 | break; |
| 942 | } |
| 943 | |
| 944 | /* Start check must be after the end check. */ |
| 945 | if (is_start) continue; |
| 946 | } |
| 947 | |
| 948 | if (!is_start) |
| 949 | { |
| 950 | if (after_starstar) |
| 951 | { |
| 952 | out.out_str[0] = CHAR_LEFT_PARENTHESIS; |
| 953 | out.out_str[1] = CHAR_QUESTION_MARK; |
| 954 | out.out_str[2] = CHAR_GREATER_THAN_SIGN; |
| 955 | convert_glob_write_str(&out, 3); |
| 956 | in_atomic = TRUE; |
| 957 | } |
| 958 | else |
| 959 | convert_glob_print_commit(&out); |
| 960 | } |
| 961 | |
| 962 | if (no_wildsep) |
| 963 | convert_glob_write(&out, CHAR_DOT); |
| 964 | else |
| 965 | convert_glob_print_wildcard(&out, separator, with_escape); |
| 966 | |
| 967 | out.out_str[0] = CHAR_ASTERISK; |
| 968 | out.out_str[1] = CHAR_QUESTION_MARK; |
| 969 | if (pattern >= pattern_end) |
| 970 | out.out_str[1] = CHAR_PLUS; |
| 971 | convert_glob_write_str(&out, 2); |
| 972 | continue; |
| 973 | } |
| 974 | |
| 975 | if (c == CHAR_QUESTION_MARK) |
| 976 | { |
| 977 | if (no_wildsep) |
| 978 | convert_glob_write(&out, CHAR_DOT); |
| 979 | else |
| 980 | convert_glob_print_wildcard(&out, separator, with_escape); |
| 981 | continue; |
| 982 | } |
| 983 | |
| 984 | if (c == CHAR_LEFT_SQUARE_BRACKET) |
| 985 | { |
| 986 | result = convert_glob_parse_range(&pattern, pattern_end, |
| 987 | &out, utf, separator, with_escape, escape, no_wildsep); |
| 988 | if (result != 0) break; |
| 989 | continue; |
| 990 | } |
| 991 | |
| 992 | if (escape != 0 && c == escape) |
| 993 | { |
| 994 | if (pattern >= pattern_end) |
| 995 | { |
| 996 | result = PCRE2_ERROR_CONVERT_SYNTAX; |
| 997 | break; |
| 998 | } |
| 999 | c = *pattern++; |
| 1000 | } |
| 1001 | |
| 1002 | if (c < 128 && strchr(pcre2_escaped_literals, c) != NULL) |
| 1003 | convert_glob_write(&out, CHAR_BACKSLASH); |
| 1004 | |
| 1005 | convert_glob_write(&out, c); |
| 1006 | } |
| 1007 | |
| 1008 | if (result == 0) |
| 1009 | { |
| 1010 | if (!no_slash_z) |
| 1011 | { |
| 1012 | out.out_str[0] = CHAR_BACKSLASH; |
| 1013 | out.out_str[1] = CHAR_z; |
| 1014 | convert_glob_write_str(&out, 2); |
| 1015 | } |
| 1016 | |
| 1017 | if (in_atomic) |
| 1018 | convert_glob_write(&out, CHAR_RIGHT_PARENTHESIS); |
| 1019 | |
| 1020 | convert_glob_write(&out, CHAR_NUL); |
| 1021 | |
| 1022 | if (!dummyrun && out.output_size != (PCRE2_SIZE) (out.output - use_buffer)) |
| 1023 | result = PCRE2_ERROR_NOMEMORY; |
| 1024 | } |
| 1025 | |
| 1026 | if (result != 0) |
| 1027 | { |
| 1028 | *bufflenptr = pattern - pattern_start; |
| 1029 | return result; |
| 1030 | } |
| 1031 | |
| 1032 | *bufflenptr = out.output_size - 1; |
| 1033 | return 0; |
| 1034 | } |
| 1035 | |
| 1036 | |
| 1037 | /************************************************* |
| 1038 | * Convert pattern * |
| 1039 | *************************************************/ |
| 1040 | |
| 1041 | /* This is the external-facing function for converting other forms of pattern |
| 1042 | into PCRE2 regular expression patterns. On error, the bufflenptr argument is |
| 1043 | used to return an offset in the original pattern. |
| 1044 | |
| 1045 | Arguments: |
| 1046 | pattern the input pattern |
| 1047 | plength length of input, or PCRE2_ZERO_TERMINATED |
| 1048 | options options bits |
| 1049 | buffptr pointer to pointer to output buffer |
| 1050 | bufflenptr pointer to length of output buffer |
| 1051 | ccontext convert context or NULL |
| 1052 | |
| 1053 | Returns: 0 for success, else an error code (+ve or -ve) |
| 1054 | */ |
| 1055 | |
| 1056 | PCRE2_EXP_DEFN int PCRE2_CALL_CONVENTION |
| 1057 | pcre2_pattern_convert(PCRE2_SPTR pattern, PCRE2_SIZE plength, uint32_t options, |
| 1058 | PCRE2_UCHAR **buffptr, PCRE2_SIZE *bufflenptr, |
| 1059 | pcre2_convert_context *ccontext) |
| 1060 | { |
| 1061 | int i, rc; |
| 1062 | PCRE2_UCHAR dummy_buffer[DUMMY_BUFFER_SIZE]; |
| 1063 | PCRE2_UCHAR *use_buffer = dummy_buffer; |
| 1064 | PCRE2_SIZE use_length = DUMMY_BUFFER_SIZE; |
| 1065 | BOOL utf = (options & PCRE2_CONVERT_UTF) != 0; |
| 1066 | uint32_t pattype = options & TYPE_OPTIONS; |
| 1067 | |
| 1068 | if (pattern == NULL || bufflenptr == NULL) return PCRE2_ERROR_NULL; |
Elliott Hughes | 653c210 | 2019-01-09 15:41:36 -0800 | [diff] [blame^] | 1069 | |
Elliott Hughes | 9bc971b | 2018-07-27 13:23:14 -0700 | [diff] [blame] | 1070 | if ((options & ~ALL_OPTIONS) != 0 || /* Undefined bit set */ |
| 1071 | (pattype & (~pattype+1)) != pattype || /* More than one type set */ |
| 1072 | pattype == 0) /* No type set */ |
| 1073 | { |
Elliott Hughes | 653c210 | 2019-01-09 15:41:36 -0800 | [diff] [blame^] | 1074 | *bufflenptr = 0; /* Error offset */ |
Elliott Hughes | 9bc971b | 2018-07-27 13:23:14 -0700 | [diff] [blame] | 1075 | return PCRE2_ERROR_BADOPTION; |
| 1076 | } |
| 1077 | |
| 1078 | if (plength == PCRE2_ZERO_TERMINATED) plength = PRIV(strlen)(pattern); |
| 1079 | if (ccontext == NULL) ccontext = |
| 1080 | (pcre2_convert_context *)(&PRIV(default_convert_context)); |
| 1081 | |
| 1082 | /* Check UTF if required. */ |
| 1083 | |
| 1084 | #ifndef SUPPORT_UNICODE |
Elliott Hughes | 653c210 | 2019-01-09 15:41:36 -0800 | [diff] [blame^] | 1085 | if (utf) |
| 1086 | { |
| 1087 | *bufflenptr = 0; /* Error offset */ |
| 1088 | return PCRE2_ERROR_UNICODE_NOT_SUPPORTED; |
| 1089 | } |
Elliott Hughes | 9bc971b | 2018-07-27 13:23:14 -0700 | [diff] [blame] | 1090 | #else |
| 1091 | if (utf && (options & PCRE2_CONVERT_NO_UTF_CHECK) == 0) |
| 1092 | { |
| 1093 | PCRE2_SIZE erroroffset; |
| 1094 | rc = PRIV(valid_utf)(pattern, plength, &erroroffset); |
| 1095 | if (rc != 0) |
| 1096 | { |
| 1097 | *bufflenptr = erroroffset; |
| 1098 | return rc; |
| 1099 | } |
| 1100 | } |
| 1101 | #endif |
| 1102 | |
| 1103 | /* If buffptr is not NULL, and what it points to is not NULL, we are being |
| 1104 | provided with a buffer and a length, so set them as the buffer to use. */ |
| 1105 | |
| 1106 | if (buffptr != NULL && *buffptr != NULL) |
| 1107 | { |
| 1108 | use_buffer = *buffptr; |
| 1109 | use_length = *bufflenptr; |
| 1110 | } |
| 1111 | |
| 1112 | /* Call an individual converter, either just once (if a buffer was provided or |
| 1113 | just the length is needed), or twice (if a memory allocation is required). */ |
| 1114 | |
| 1115 | for (i = 0; i < 2; i++) |
| 1116 | { |
| 1117 | PCRE2_UCHAR *allocated; |
| 1118 | BOOL dummyrun = buffptr == NULL || *buffptr == NULL; |
| 1119 | |
| 1120 | switch(pattype) |
| 1121 | { |
| 1122 | case PCRE2_CONVERT_GLOB: |
| 1123 | rc = convert_glob(options & ~PCRE2_CONVERT_GLOB, pattern, plength, utf, |
| 1124 | use_buffer, use_length, bufflenptr, dummyrun, ccontext); |
| 1125 | break; |
| 1126 | |
| 1127 | case PCRE2_CONVERT_POSIX_BASIC: |
| 1128 | case PCRE2_CONVERT_POSIX_EXTENDED: |
| 1129 | rc = convert_posix(pattype, pattern, plength, utf, use_buffer, use_length, |
| 1130 | bufflenptr, dummyrun, ccontext); |
| 1131 | break; |
| 1132 | |
| 1133 | default: |
Elliott Hughes | 653c210 | 2019-01-09 15:41:36 -0800 | [diff] [blame^] | 1134 | *bufflenptr = 0; /* Error offset */ |
Elliott Hughes | 9bc971b | 2018-07-27 13:23:14 -0700 | [diff] [blame] | 1135 | return PCRE2_ERROR_INTERNAL; |
| 1136 | } |
| 1137 | |
| 1138 | if (rc != 0 || /* Error */ |
| 1139 | buffptr == NULL || /* Just the length is required */ |
| 1140 | *buffptr != NULL) /* Buffer was provided or allocated */ |
| 1141 | return rc; |
| 1142 | |
| 1143 | /* Allocate memory for the buffer, with hidden space for an allocator at |
| 1144 | the start. The next time round the loop runs the conversion for real. */ |
| 1145 | |
| 1146 | allocated = PRIV(memctl_malloc)(sizeof(pcre2_memctl) + |
| 1147 | (*bufflenptr + 1)*PCRE2_CODE_UNIT_WIDTH, (pcre2_memctl *)ccontext); |
| 1148 | if (allocated == NULL) return PCRE2_ERROR_NOMEMORY; |
| 1149 | *buffptr = (PCRE2_UCHAR *)(((char *)allocated) + sizeof(pcre2_memctl)); |
| 1150 | |
| 1151 | use_buffer = *buffptr; |
| 1152 | use_length = *bufflenptr + 1; |
| 1153 | } |
| 1154 | |
| 1155 | /* Control should never get here. */ |
| 1156 | |
| 1157 | return PCRE2_ERROR_INTERNAL; |
| 1158 | } |
| 1159 | |
| 1160 | |
| 1161 | /************************************************* |
| 1162 | * Free converted pattern * |
| 1163 | *************************************************/ |
| 1164 | |
| 1165 | /* This frees a converted pattern that was put in newly-allocated memory. |
| 1166 | |
| 1167 | Argument: the converted pattern |
| 1168 | Returns: nothing |
| 1169 | */ |
| 1170 | |
| 1171 | PCRE2_EXP_DEFN void PCRE2_CALL_CONVENTION |
| 1172 | pcre2_converted_pattern_free(PCRE2_UCHAR *converted) |
| 1173 | { |
| 1174 | if (converted != NULL) |
| 1175 | { |
| 1176 | pcre2_memctl *memctl = |
| 1177 | (pcre2_memctl *)((char *)converted - sizeof(pcre2_memctl)); |
| 1178 | memctl->free(memctl, memctl->memory_data); |
| 1179 | } |
| 1180 | } |
| 1181 | |
| 1182 | /* End of pcre2_convert.c */ |