1 /************************************************* 2 * Perl-Compatible Regular Expressions * 3 *************************************************/ 4 5 6 /* PCRE is a library of functions to support regular expressions whose syntax 7 and semantics are as close as possible to those of the Perl 5 language. 8 9 Written by Philip Hazel 10 Copyright (c) 1997-2010 University of Cambridge 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 /* This header contains definitions that are shared between the different 42 modules, but which are not relevant to the exported API. This includes some 43 functions whose names all begin with "_pcre_". */ 44 45 #ifndef PCRE_INTERNAL_H 46 #define PCRE_INTERNAL_H 47 48 /* Define PCRE_DEBUG to get debugging output on stdout. */ 49 50 #if 0 51 #define PCRE_DEBUG 52 #endif 53 54 /* We do not support both EBCDIC and UTF-8 at the same time. The "configure" 55 script prevents both being selected, but not everybody uses "configure". */ 56 57 #if defined EBCDIC && defined SUPPORT_UTF8 58 #error The use of both EBCDIC and SUPPORT_UTF8 is not supported. 59 #endif 60 61 /* If SUPPORT_UCP is defined, SUPPORT_UTF8 must also be defined. The 62 "configure" script ensures this, but not everybody uses "configure". */ 63 64 #if defined SUPPORT_UCP && !defined SUPPORT_UTF8 65 #define SUPPORT_UTF8 1 66 #endif 67 68 /* Use a macro for debugging printing, 'cause that eliminates the use of #ifdef 69 inline, and there are *still* stupid compilers about that don't like indented 70 pre-processor statements, or at least there were when I first wrote this. After 71 all, it had only been about 10 years then... 72 73 It turns out that the Mac Debugging.h header also defines the macro DPRINTF, so 74 be absolutely sure we get our version. */ 75 76 #undef DPRINTF 77 #ifdef PCRE_DEBUG 78 #define DPRINTF(p) printf p 79 #else 80 #define DPRINTF(p) /* Nothing */ 81 #endif 82 83 84 /* Standard C headers plus the external interface definition. The only time 85 setjmp and stdarg are used is when NO_RECURSE is set. */ 86 87 #include <ctype.h> 88 #include <limits.h> 89 #include <stddef.h> 90 #include <stdio.h> 91 #include <stdlib.h> 92 #include <string.h> 93 94 /* When compiling a DLL for Windows, the exported symbols have to be declared 95 using some MS magic. I found some useful information on this web page: 96 http://msdn2.microsoft.com/en-us/library/y4h7bcy6(VS.80).aspx. According to the 97 information there, using __declspec(dllexport) without "extern" we have a 98 definition; with "extern" we have a declaration. The settings here override the 99 setting in pcre.h (which is included below); it defines only PCRE_EXP_DECL, 100 which is all that is needed for applications (they just import the symbols). We 101 use: 102 103 PCRE_EXP_DECL for declarations 104 PCRE_EXP_DEFN for definitions of exported functions 105 PCRE_EXP_DATA_DEFN for definitions of exported variables 106 107 The reason for the two DEFN macros is that in non-Windows environments, one 108 does not want to have "extern" before variable definitions because it leads to 109 compiler warnings. So we distinguish between functions and variables. In 110 Windows, the two should always be the same. 111 112 The reason for wrapping this in #ifndef PCRE_EXP_DECL is so that pcretest, 113 which is an application, but needs to import this file in order to "peek" at 114 internals, can #include pcre.h first to get an application's-eye view. 115 116 In principle, people compiling for non-Windows, non-Unix-like (i.e. uncommon, 117 special-purpose environments) might want to stick other stuff in front of 118 exported symbols. That's why, in the non-Windows case, we set PCRE_EXP_DEFN and 119 PCRE_EXP_DATA_DEFN only if they are not already set. */ 120 121 #ifndef PCRE_EXP_DECL 122 # ifdef _WIN32 123 # ifndef PCRE_STATIC 124 # define PCRE_EXP_DECL extern __declspec(dllexport) 125 # define PCRE_EXP_DEFN __declspec(dllexport) 126 # define PCRE_EXP_DATA_DEFN __declspec(dllexport) 127 # else 128 # define PCRE_EXP_DECL extern 129 # define PCRE_EXP_DEFN 130 # define PCRE_EXP_DATA_DEFN 131 # endif 132 # else 133 # ifdef __cplusplus 134 # define PCRE_EXP_DECL extern "C" 135 # else 136 # define PCRE_EXP_DECL extern 137 # endif 138 # ifndef PCRE_EXP_DEFN 139 # define PCRE_EXP_DEFN PCRE_EXP_DECL 140 # endif 141 # ifndef PCRE_EXP_DATA_DEFN 142 # define PCRE_EXP_DATA_DEFN 143 # endif 144 # endif 145 #endif 146 147 /* When compiling with the MSVC compiler, it is sometimes necessary to include 148 a "calling convention" before exported function names. (This is secondhand 149 information; I know nothing about MSVC myself). For example, something like 150 151 void __cdecl function(....) 152 153 might be needed. In order so make this easy, all the exported functions have 154 PCRE_CALL_CONVENTION just before their names. It is rarely needed; if not 155 set, we ensure here that it has no effect. */ 156 157 #ifndef PCRE_CALL_CONVENTION 158 #define PCRE_CALL_CONVENTION 159 #endif 160 161 /* We need to have types that specify unsigned 16-bit and 32-bit integers. We 162 cannot determine these outside the compilation (e.g. by running a program as 163 part of "configure") because PCRE is often cross-compiled for use on other 164 systems. Instead we make use of the maximum sizes that are available at 165 preprocessor time in standard C environments. */ 166 167 #if USHRT_MAX == 65535 168 typedef unsigned short pcre_uint16; 169 typedef short pcre_int16; 170 #elif UINT_MAX == 65535 171 typedef unsigned int pcre_uint16; 172 typedef int pcre_int16; 173 #else 174 #error Cannot determine a type for 16-bit unsigned integers 175 #endif 176 177 #if UINT_MAX == 4294967295 178 typedef unsigned int pcre_uint32; 179 typedef int pcre_int32; 180 #elif ULONG_MAX == 4294967295 181 typedef unsigned long int pcre_uint32; 182 typedef long int pcre_int32; 183 #else 184 #error Cannot determine a type for 32-bit unsigned integers 185 #endif 186 187 /* When checking for integer overflow in pcre_compile(), we need to handle 188 large integers. If a 64-bit integer type is available, we can use that. 189 Otherwise we have to cast to double, which of course requires floating point 190 arithmetic. Handle this by defining a macro for the appropriate type. If 191 stdint.h is available, include it; it may define INT64_MAX. Systems that do not 192 have stdint.h (e.g. Solaris) may have inttypes.h. The macro int64_t may be set 193 by "configure". */ 194 195 #if HAVE_STDINT_H 196 #include <stdint.h> 197 #elif HAVE_INTTYPES_H 198 #include <inttypes.h> 199 #endif 200 201 #if defined INT64_MAX || defined int64_t 202 #define INT64_OR_DOUBLE int64_t 203 #else 204 #define INT64_OR_DOUBLE double 205 #endif 206 207 /* All character handling must be done as unsigned characters. Otherwise there 208 are problems with top-bit-set characters and functions such as isspace(). 209 However, we leave the interface to the outside world as char *, because that 210 should make things easier for callers. We define a short type for unsigned char 211 to save lots of typing. I tried "uchar", but it causes problems on Digital 212 Unix, where it is defined in sys/types, so use "uschar" instead. */ 213 214 typedef unsigned char uschar; 215 216 /* This is an unsigned int value that no character can ever have. UTF-8 217 characters only go up to 0x7fffffff (though Unicode doesn't go beyond 218 0x0010ffff). */ 219 220 #define NOTACHAR 0xffffffff 221 222 /* PCRE is able to support several different kinds of newline (CR, LF, CRLF, 223 "any" and "anycrlf" at present). The following macros are used to package up 224 testing for newlines. NLBLOCK, PSSTART, and PSEND are defined in the various 225 modules to indicate in which datablock the parameters exist, and what the 226 start/end of string field names are. */ 227 228 #define NLTYPE_FIXED 0 /* Newline is a fixed length string */ 229 #define NLTYPE_ANY 1 /* Newline is any Unicode line ending */ 230 #define NLTYPE_ANYCRLF 2 /* Newline is CR, LF, or CRLF */ 231 232 /* This macro checks for a newline at the given position */ 233 234 #define IS_NEWLINE(p) \ 235 ((NLBLOCK->nltype != NLTYPE_FIXED)? \ 236 ((p) < NLBLOCK->PSEND && \ 237 _pcre_is_newline((p), NLBLOCK->nltype, NLBLOCK->PSEND, &(NLBLOCK->nllen),\ 238 utf8)) \ 239 : \ 240 ((p) <= NLBLOCK->PSEND - NLBLOCK->nllen && \ 241 (p)[0] == NLBLOCK->nl[0] && \ 242 (NLBLOCK->nllen == 1 || (p)[1] == NLBLOCK->nl[1]) \ 243 ) \ 244 ) 245 246 /* This macro checks for a newline immediately preceding the given position */ 247 248 #define WAS_NEWLINE(p) \ 249 ((NLBLOCK->nltype != NLTYPE_FIXED)? \ 250 ((p) > NLBLOCK->PSSTART && \ 251 _pcre_was_newline((p), NLBLOCK->nltype, NLBLOCK->PSSTART, \ 252 &(NLBLOCK->nllen), utf8)) \ 253 : \ 254 ((p) >= NLBLOCK->PSSTART + NLBLOCK->nllen && \ 255 (p)[-NLBLOCK->nllen] == NLBLOCK->nl[0] && \ 256 (NLBLOCK->nllen == 1 || (p)[-NLBLOCK->nllen+1] == NLBLOCK->nl[1]) \ 257 ) \ 258 ) 259 260 /* When PCRE is compiled as a C++ library, the subject pointer can be replaced 261 with a custom type. This makes it possible, for example, to allow pcre_exec() 262 to process subject strings that are discontinuous by using a smart pointer 263 class. It must always be possible to inspect all of the subject string in 264 pcre_exec() because of the way it backtracks. Two macros are required in the 265 normal case, for sign-unspecified and unsigned char pointers. The former is 266 used for the external interface and appears in pcre.h, which is why its name 267 must begin with PCRE_. */ 268 269 #ifdef CUSTOM_SUBJECT_PTR 270 #define PCRE_SPTR CUSTOM_SUBJECT_PTR 271 #define USPTR CUSTOM_SUBJECT_PTR 272 #else 273 #define PCRE_SPTR const char * 274 #define USPTR const unsigned char * 275 #endif 276 277 278 279 /* Include the public PCRE header and the definitions of UCP character property 280 values. */ 281 282 #include "pcre.h" 283 #include "ucp.h" 284 285 /* When compiling for use with the Virtual Pascal compiler, these functions 286 need to have their names changed. PCRE must be compiled with the -DVPCOMPAT 287 option on the command line. */ 288 289 #ifdef VPCOMPAT 290 #define strlen(s) _strlen(s) 291 #define strncmp(s1,s2,m) _strncmp(s1,s2,m) 292 #define memcmp(s,c,n) _memcmp(s,c,n) 293 #define memcpy(d,s,n) _memcpy(d,s,n) 294 #define memmove(d,s,n) _memmove(d,s,n) 295 #define memset(s,c,n) _memset(s,c,n) 296 #else /* VPCOMPAT */ 297 298 /* To cope with SunOS4 and other systems that lack memmove() but have bcopy(), 299 define a macro for memmove() if HAVE_MEMMOVE is false, provided that HAVE_BCOPY 300 is set. Otherwise, include an emulating function for those systems that have 301 neither (there some non-Unix environments where this is the case). */ 302 303 #ifndef HAVE_MEMMOVE 304 #undef memmove /* some systems may have a macro */ 305 #ifdef HAVE_BCOPY 306 #define memmove(a, b, c) bcopy(b, a, c) 307 #else /* HAVE_BCOPY */ 308 static void * 309 pcre_memmove(void *d, const void *s, size_t n) 310 { 311 size_t i; 312 unsigned char *dest = (unsigned char *)d; 313 const unsigned char *src = (const unsigned char *)s; 314 if (dest > src) 315 { 316 dest += n; 317 src += n; 318 for (i = 0; i < n; ++i) *(--dest) = *(--src); 319 return (void *)dest; 320 } 321 else 322 { 323 for (i = 0; i < n; ++i) *dest++ = *src++; 324 return (void *)(dest - n); 325 } 326 } 327 #define memmove(a, b, c) pcre_memmove(a, b, c) 328 #endif /* not HAVE_BCOPY */ 329 #endif /* not HAVE_MEMMOVE */ 330 #endif /* not VPCOMPAT */ 331 332 333 /* PCRE keeps offsets in its compiled code as 2-byte quantities (always stored 334 in big-endian order) by default. These are used, for example, to link from the 335 start of a subpattern to its alternatives and its end. The use of 2 bytes per 336 offset limits the size of the compiled regex to around 64K, which is big enough 337 for almost everybody. However, I received a request for an even bigger limit. 338 For this reason, and also to make the code easier to maintain, the storing and 339 loading of offsets from the byte string is now handled by the macros that are 340 defined here. 341 342 The macros are controlled by the value of LINK_SIZE. This defaults to 2 in 343 the config.h file, but can be overridden by using -D on the command line. This 344 is automated on Unix systems via the "configure" command. */ 345 346 #if LINK_SIZE == 2 347 348 #define PUT(a,n,d) \ 349 (a[n] = (d) >> 8), \ 350 (a[(n)+1] = (d) & 255) 351 352 #define GET(a,n) \ 353 (((a)[n] << 8) | (a)[(n)+1]) 354 355 #define MAX_PATTERN_SIZE (1 << 16) 356 357 358 #elif LINK_SIZE == 3 359 360 #define PUT(a,n,d) \ 361 (a[n] = (d) >> 16), \ 362 (a[(n)+1] = (d) >> 8), \ 363 (a[(n)+2] = (d) & 255) 364 365 #define GET(a,n) \ 366 (((a)[n] << 16) | ((a)[(n)+1] << 8) | (a)[(n)+2]) 367 368 #define MAX_PATTERN_SIZE (1 << 24) 369 370 371 #elif LINK_SIZE == 4 372 373 #define PUT(a,n,d) \ 374 (a[n] = (d) >> 24), \ 375 (a[(n)+1] = (d) >> 16), \ 376 (a[(n)+2] = (d) >> 8), \ 377 (a[(n)+3] = (d) & 255) 378 379 #define GET(a,n) \ 380 (((a)[n] << 24) | ((a)[(n)+1] << 16) | ((a)[(n)+2] << 8) | (a)[(n)+3]) 381 382 #define MAX_PATTERN_SIZE (1 << 30) /* Keep it positive */ 383 384 385 #else 386 #error LINK_SIZE must be either 2, 3, or 4 387 #endif 388 389 390 /* Convenience macro defined in terms of the others */ 391 392 #define PUTINC(a,n,d) PUT(a,n,d), a += LINK_SIZE 393 394 395 /* PCRE uses some other 2-byte quantities that do not change when the size of 396 offsets changes. There are used for repeat counts and for other things such as 397 capturing parenthesis numbers in back references. */ 398 399 #define PUT2(a,n,d) \ 400 a[n] = (d) >> 8; \ 401 a[(n)+1] = (d) & 255 402 403 #define GET2(a,n) \ 404 (((a)[n] << 8) | (a)[(n)+1]) 405 406 #define PUT2INC(a,n,d) PUT2(a,n,d), a += 2 407 408 409 /* When UTF-8 encoding is being used, a character is no longer just a single 410 byte. The macros for character handling generate simple sequences when used in 411 byte-mode, and more complicated ones for UTF-8 characters. GETCHARLENTEST is 412 not used when UTF-8 is not supported, so it is not defined, and BACKCHAR should 413 never be called in byte mode. To make sure they can never even appear when 414 UTF-8 support is omitted, we don't even define them. */ 415 416 #ifndef SUPPORT_UTF8 417 #define GETCHAR(c, eptr) c = *eptr; 418 #define GETCHARTEST(c, eptr) c = *eptr; 419 #define GETCHARINC(c, eptr) c = *eptr++; 420 #define GETCHARINCTEST(c, eptr) c = *eptr++; 421 #define GETCHARLEN(c, eptr, len) c = *eptr; 422 /* #define GETCHARLENTEST(c, eptr, len) */ 423 /* #define BACKCHAR(eptr) */ 424 425 #else /* SUPPORT_UTF8 */ 426 427 /* These macros were originally written in the form of loops that used data 428 from the tables whose names start with _pcre_utf8_table. They were rewritten by 429 a user so as not to use loops, because in some environments this gives a 430 significant performance advantage, and it seems never to do any harm. */ 431 432 /* Base macro to pick up the remaining bytes of a UTF-8 character, not 433 advancing the pointer. */ 434 435 #define GETUTF8(c, eptr) \ 436 { \ 437 if ((c & 0x20) == 0) \ 438 c = ((c & 0x1f) << 6) | (eptr[1] & 0x3f); \ 439 else if ((c & 0x10) == 0) \ 440 c = ((c & 0x0f) << 12) | ((eptr[1] & 0x3f) << 6) | (eptr[2] & 0x3f); \ 441 else if ((c & 0x08) == 0) \ 442 c = ((c & 0x07) << 18) | ((eptr[1] & 0x3f) << 12) | \ 443 ((eptr[2] & 0x3f) << 6) | (eptr[3] & 0x3f); \ 444 else if ((c & 0x04) == 0) \ 445 c = ((c & 0x03) << 24) | ((eptr[1] & 0x3f) << 18) | \ 446 ((eptr[2] & 0x3f) << 12) | ((eptr[3] & 0x3f) << 6) | \ 447 (eptr[4] & 0x3f); \ 448 else \ 449 c = ((c & 0x01) << 30) | ((eptr[1] & 0x3f) << 24) | \ 450 ((eptr[2] & 0x3f) << 18) | ((eptr[3] & 0x3f) << 12) | \ 451 ((eptr[4] & 0x3f) << 6) | (eptr[5] & 0x3f); \ 452 } 453 454 /* Get the next UTF-8 character, not advancing the pointer. This is called when 455 we know we are in UTF-8 mode. */ 456 457 #define GETCHAR(c, eptr) \ 458 c = *eptr; \ 459 if (c >= 0xc0) GETUTF8(c, eptr); 460 461 /* Get the next UTF-8 character, testing for UTF-8 mode, and not advancing the 462 pointer. */ 463 464 #define GETCHARTEST(c, eptr) \ 465 c = *eptr; \ 466 if (utf8 && c >= 0xc0) GETUTF8(c, eptr); 467 468 /* Base macro to pick up the remaining bytes of a UTF-8 character, advancing 469 the pointer. */ 470 471 #define GETUTF8INC(c, eptr) \ 472 { \ 473 if ((c & 0x20) == 0) \ 474 c = ((c & 0x1f) << 6) | (*eptr++ & 0x3f); \ 475 else if ((c & 0x10) == 0) \ 476 { \ 477 c = ((c & 0x0f) << 12) | ((*eptr & 0x3f) << 6) | (eptr[1] & 0x3f); \ 478 eptr += 2; \ 479 } \ 480 else if ((c & 0x08) == 0) \ 481 { \ 482 c = ((c & 0x07) << 18) | ((*eptr & 0x3f) << 12) | \ 483 ((eptr[1] & 0x3f) << 6) | (eptr[2] & 0x3f); \ 484 eptr += 3; \ 485 } \ 486 else if ((c & 0x04) == 0) \ 487 { \ 488 c = ((c & 0x03) << 24) | ((*eptr & 0x3f) << 18) | \ 489 ((eptr[1] & 0x3f) << 12) | ((eptr[2] & 0x3f) << 6) | \ 490 (eptr[3] & 0x3f); \ 491 eptr += 4; \ 492 } \ 493 else \ 494 { \ 495 c = ((c & 0x01) << 30) | ((*eptr & 0x3f) << 24) | \ 496 ((eptr[1] & 0x3f) << 18) | ((eptr[2] & 0x3f) << 12) | \ 497 ((eptr[3] & 0x3f) << 6) | (eptr[4] & 0x3f); \ 498 eptr += 5; \ 499 } \ 500 } 501 502 /* Get the next UTF-8 character, advancing the pointer. This is called when we 503 know we are in UTF-8 mode. */ 504 505 #define GETCHARINC(c, eptr) \ 506 c = *eptr++; \ 507 if (c >= 0xc0) GETUTF8INC(c, eptr); 508 509 /* Get the next character, testing for UTF-8 mode, and advancing the pointer. 510 This is called when we don't know if we are in UTF-8 mode. */ 511 512 #define GETCHARINCTEST(c, eptr) \ 513 c = *eptr++; \ 514 if (utf8 && c >= 0xc0) GETUTF8INC(c, eptr); 515 516 /* Base macro to pick up the remaining bytes of a UTF-8 character, not 517 advancing the pointer, incrementing the length. */ 518 519 #define GETUTF8LEN(c, eptr, len) \ 520 { \ 521 if ((c & 0x20) == 0) \ 522 { \ 523 c = ((c & 0x1f) << 6) | (eptr[1] & 0x3f); \ 524 len++; \ 525 } \ 526 else if ((c & 0x10) == 0) \ 527 { \ 528 c = ((c & 0x0f) << 12) | ((eptr[1] & 0x3f) << 6) | (eptr[2] & 0x3f); \ 529 len += 2; \ 530 } \ 531 else if ((c & 0x08) == 0) \ 532 {\ 533 c = ((c & 0x07) << 18) | ((eptr[1] & 0x3f) << 12) | \ 534 ((eptr[2] & 0x3f) << 6) | (eptr[3] & 0x3f); \ 535 len += 3; \ 536 } \ 537 else if ((c & 0x04) == 0) \ 538 { \ 539 c = ((c & 0x03) << 24) | ((eptr[1] & 0x3f) << 18) | \ 540 ((eptr[2] & 0x3f) << 12) | ((eptr[3] & 0x3f) << 6) | \ 541 (eptr[4] & 0x3f); \ 542 len += 4; \ 543 } \ 544 else \ 545 {\ 546 c = ((c & 0x01) << 30) | ((eptr[1] & 0x3f) << 24) | \ 547 ((eptr[2] & 0x3f) << 18) | ((eptr[3] & 0x3f) << 12) | \ 548 ((eptr[4] & 0x3f) << 6) | (eptr[5] & 0x3f); \ 549 len += 5; \ 550 } \ 551 } 552 553 /* Get the next UTF-8 character, not advancing the pointer, incrementing length 554 if there are extra bytes. This is called when we know we are in UTF-8 mode. */ 555 556 #define GETCHARLEN(c, eptr, len) \ 557 c = *eptr; \ 558 if (c >= 0xc0) GETUTF8LEN(c, eptr, len); 559 560 /* Get the next UTF-8 character, testing for UTF-8 mode, not advancing the 561 pointer, incrementing length if there are extra bytes. This is called when we 562 do not know if we are in UTF-8 mode. */ 563 564 #define GETCHARLENTEST(c, eptr, len) \ 565 c = *eptr; \ 566 if (utf8 && c >= 0xc0) GETUTF8LEN(c, eptr, len); 567 568 /* If the pointer is not at the start of a character, move it back until 569 it is. This is called only in UTF-8 mode - we don't put a test within the macro 570 because almost all calls are already within a block of UTF-8 only code. */ 571 572 #define BACKCHAR(eptr) while((*eptr & 0xc0) == 0x80) eptr-- 573 574 #endif /* SUPPORT_UTF8 */ 575 576 577 /* In case there is no definition of offsetof() provided - though any proper 578 Standard C system should have one. */ 579 580 #ifndef offsetof 581 #define offsetof(p_type,field) ((size_t)&(((p_type *)0)->field)) 582 #endif 583 584 585 /* These are the public options that can change during matching. */ 586 587 #define PCRE_IMS (PCRE_CASELESS|PCRE_MULTILINE|PCRE_DOTALL) 588 589 /* Private flags containing information about the compiled regex. They used to 590 live at the top end of the options word, but that got almost full, so now they 591 are in a 16-bit flags word. From release 8.00, PCRE_NOPARTIAL is unused, as 592 the restrictions on partial matching have been lifted. It remains for backwards 593 compatibility. */ 594 595 #define PCRE_NOPARTIAL 0x0001 /* can't use partial with this regex */ 596 #define PCRE_FIRSTSET 0x0002 /* first_byte is set */ 597 #define PCRE_REQCHSET 0x0004 /* req_byte is set */ 598 #define PCRE_STARTLINE 0x0008 /* start after \n for multiline */ 599 #define PCRE_JCHANGED 0x0010 /* j option used in regex */ 600 #define PCRE_HASCRORLF 0x0020 /* explicit \r or \n in pattern */ 601 602 /* Options for the "extra" block produced by pcre_study(). */ 603 604 #define PCRE_STUDY_MAPPED 0x01 /* a map of starting chars exists */ 605 #define PCRE_STUDY_MINLEN 0x02 /* a minimum length field exists */ 606 607 /* Masks for identifying the public options that are permitted at compile 608 time, run time, or study time, respectively. */ 609 610 #define PCRE_NEWLINE_BITS (PCRE_NEWLINE_CR|PCRE_NEWLINE_LF|PCRE_NEWLINE_ANY| \ 611 PCRE_NEWLINE_ANYCRLF) 612 613 #define PUBLIC_COMPILE_OPTIONS \ 614 (PCRE_CASELESS|PCRE_EXTENDED|PCRE_ANCHORED|PCRE_MULTILINE| \ 615 PCRE_DOTALL|PCRE_DOLLAR_ENDONLY|PCRE_EXTRA|PCRE_UNGREEDY|PCRE_UTF8| \ 616 PCRE_NO_AUTO_CAPTURE|PCRE_NO_UTF8_CHECK|PCRE_AUTO_CALLOUT|PCRE_FIRSTLINE| \ 617 PCRE_DUPNAMES|PCRE_NEWLINE_BITS|PCRE_BSR_ANYCRLF|PCRE_BSR_UNICODE| \ 618 PCRE_JAVASCRIPT_COMPAT|PCRE_UCP|PCRE_NO_START_OPTIMIZE) 619 620 #define PUBLIC_EXEC_OPTIONS \ 621 (PCRE_ANCHORED|PCRE_NOTBOL|PCRE_NOTEOL|PCRE_NOTEMPTY|PCRE_NOTEMPTY_ATSTART| \ 622 PCRE_NO_UTF8_CHECK|PCRE_PARTIAL_HARD|PCRE_PARTIAL_SOFT|PCRE_NEWLINE_BITS| \ 623 PCRE_BSR_ANYCRLF|PCRE_BSR_UNICODE|PCRE_NO_START_OPTIMIZE) 624 625 #define PUBLIC_DFA_EXEC_OPTIONS \ 626 (PCRE_ANCHORED|PCRE_NOTBOL|PCRE_NOTEOL|PCRE_NOTEMPTY|PCRE_NOTEMPTY_ATSTART| \ 627 PCRE_NO_UTF8_CHECK|PCRE_PARTIAL_HARD|PCRE_PARTIAL_SOFT|PCRE_DFA_SHORTEST| \ 628 PCRE_DFA_RESTART|PCRE_NEWLINE_BITS|PCRE_BSR_ANYCRLF|PCRE_BSR_UNICODE| \ 629 PCRE_NO_START_OPTIMIZE) 630 631 #define PUBLIC_STUDY_OPTIONS 0 /* None defined */ 632 633 /* Magic number to provide a small check against being handed junk. Also used 634 to detect whether a pattern was compiled on a host of different endianness. */ 635 636 #define MAGIC_NUMBER 0x50435245UL /* 'PCRE' */ 637 638 /* Negative values for the firstchar and reqchar variables */ 639 640 #define REQ_UNSET (-2) 641 #define REQ_NONE (-1) 642 643 /* The maximum remaining length of subject we are prepared to search for a 644 req_byte match. */ 645 646 #define REQ_BYTE_MAX 1000 647 648 /* Flags added to firstbyte or reqbyte; a "non-literal" item is either a 649 variable-length repeat, or a anything other than literal characters. */ 650 651 #define REQ_CASELESS 0x0100 /* indicates caselessness */ 652 #define REQ_VARY 0x0200 /* reqbyte followed non-literal item */ 653 654 /* Miscellaneous definitions. The #ifndef is to pacify compiler warnings in 655 environments where these macros are defined elsewhere. Unfortunately, there 656 is no way to do the same for the typedef. */ 657 658 typedef int BOOL; 659 660 #ifndef FALSE 661 #define FALSE 0 662 #define TRUE 1 663 #endif 664 665 /* If PCRE is to support UTF-8 on EBCDIC platforms, we cannot use normal 666 character constants like '*' because the compiler would emit their EBCDIC code, 667 which is different from their ASCII/UTF-8 code. Instead we define macros for 668 the characters so that they always use the ASCII/UTF-8 code when UTF-8 support 669 is enabled. When UTF-8 support is not enabled, the definitions use character 670 literals. Both character and string versions of each character are needed, and 671 there are some longer strings as well. 672 673 This means that, on EBCDIC platforms, the PCRE library can handle either 674 EBCDIC, or UTF-8, but not both. To support both in the same compiled library 675 would need different lookups depending on whether PCRE_UTF8 was set or not. 676 This would make it impossible to use characters in switch/case statements, 677 which would reduce performance. For a theoretical use (which nobody has asked 678 for) in a minority area (EBCDIC platforms), this is not sensible. Any 679 application that did need both could compile two versions of the library, using 680 macros to give the functions distinct names. */ 681 682 #ifndef SUPPORT_UTF8 683 684 /* UTF-8 support is not enabled; use the platform-dependent character literals 685 so that PCRE works on both ASCII and EBCDIC platforms, in non-UTF-mode only. */ 686 687 #define CHAR_HT '\t' 688 #define CHAR_VT '\v' 689 #define CHAR_FF '\f' 690 #define CHAR_CR '\r' 691 #define CHAR_NL '\n' 692 #define CHAR_BS '\b' 693 #define CHAR_BEL '\a' 694 #ifdef EBCDIC 695 #define CHAR_ESC '\047' 696 #define CHAR_DEL '\007' 697 #else 698 #define CHAR_ESC '\033' 699 #define CHAR_DEL '\177' 700 #endif 701 702 #define CHAR_SPACE ' ' 703 #define CHAR_EXCLAMATION_MARK '!' 704 #define CHAR_QUOTATION_MARK '"' 705 #define CHAR_NUMBER_SIGN '#' 706 #define CHAR_DOLLAR_SIGN '$' 707 #define CHAR_PERCENT_SIGN '%' 708 #define CHAR_AMPERSAND '&' 709 #define CHAR_APOSTROPHE '\'' 710 #define CHAR_LEFT_PARENTHESIS '(' 711 #define CHAR_RIGHT_PARENTHESIS ')' 712 #define CHAR_ASTERISK '*' 713 #define CHAR_PLUS '+' 714 #define CHAR_COMMA ',' 715 #define CHAR_MINUS '-' 716 #define CHAR_DOT '.' 717 #define CHAR_SLASH '/' 718 #define CHAR_0 '0' 719 #define CHAR_1 '1' 720 #define CHAR_2 '2' 721 #define CHAR_3 '3' 722 #define CHAR_4 '4' 723 #define CHAR_5 '5' 724 #define CHAR_6 '6' 725 #define CHAR_7 '7' 726 #define CHAR_8 '8' 727 #define CHAR_9 '9' 728 #define CHAR_COLON ':' 729 #define CHAR_SEMICOLON ';' 730 #define CHAR_LESS_THAN_SIGN '<' 731 #define CHAR_EQUALS_SIGN '=' 732 #define CHAR_GREATER_THAN_SIGN '>' 733 #define CHAR_QUESTION_MARK '?' 734 #define CHAR_COMMERCIAL_AT '@' 735 #define CHAR_A 'A' 736 #define CHAR_B 'B' 737 #define CHAR_C 'C' 738 #define CHAR_D 'D' 739 #define CHAR_E 'E' 740 #define CHAR_F 'F' 741 #define CHAR_G 'G' 742 #define CHAR_H 'H' 743 #define CHAR_I 'I' 744 #define CHAR_J 'J' 745 #define CHAR_K 'K' 746 #define CHAR_L 'L' 747 #define CHAR_M 'M' 748 #define CHAR_N 'N' 749 #define CHAR_O 'O' 750 #define CHAR_P 'P' 751 #define CHAR_Q 'Q' 752 #define CHAR_R 'R' 753 #define CHAR_S 'S' 754 #define CHAR_T 'T' 755 #define CHAR_U 'U' 756 #define CHAR_V 'V' 757 #define CHAR_W 'W' 758 #define CHAR_X 'X' 759 #define CHAR_Y 'Y' 760 #define CHAR_Z 'Z' 761 #define CHAR_LEFT_SQUARE_BRACKET '[' 762 #define CHAR_BACKSLASH '\\' 763 #define CHAR_RIGHT_SQUARE_BRACKET ']' 764 #define CHAR_CIRCUMFLEX_ACCENT '^' 765 #define CHAR_UNDERSCORE '_' 766 #define CHAR_GRAVE_ACCENT '`' 767 #define CHAR_a 'a' 768 #define CHAR_b 'b' 769 #define CHAR_c 'c' 770 #define CHAR_d 'd' 771 #define CHAR_e 'e' 772 #define CHAR_f 'f' 773 #define CHAR_g 'g' 774 #define CHAR_h 'h' 775 #define CHAR_i 'i' 776 #define CHAR_j 'j' 777 #define CHAR_k 'k' 778 #define CHAR_l 'l' 779 #define CHAR_m 'm' 780 #define CHAR_n 'n' 781 #define CHAR_o 'o' 782 #define CHAR_p 'p' 783 #define CHAR_q 'q' 784 #define CHAR_r 'r' 785 #define CHAR_s 's' 786 #define CHAR_t 't' 787 #define CHAR_u 'u' 788 #define CHAR_v 'v' 789 #define CHAR_w 'w' 790 #define CHAR_x 'x' 791 #define CHAR_y 'y' 792 #define CHAR_z 'z' 793 #define CHAR_LEFT_CURLY_BRACKET '{' 794 #define CHAR_VERTICAL_LINE '|' 795 #define CHAR_RIGHT_CURLY_BRACKET '}' 796 #define CHAR_TILDE '~' 797 798 #define STR_HT "\t" 799 #define STR_VT "\v" 800 #define STR_FF "\f" 801 #define STR_CR "\r" 802 #define STR_NL "\n" 803 #define STR_BS "\b" 804 #define STR_BEL "\a" 805 #ifdef EBCDIC 806 #define STR_ESC "\047" 807 #define STR_DEL "\007" 808 #else 809 #define STR_ESC "\033" 810 #define STR_DEL "\177" 811 #endif 812 813 #define STR_SPACE " " 814 #define STR_EXCLAMATION_MARK "!" 815 #define STR_QUOTATION_MARK "\"" 816 #define STR_NUMBER_SIGN "#" 817 #define STR_DOLLAR_SIGN "$" 818 #define STR_PERCENT_SIGN "%" 819 #define STR_AMPERSAND "&" 820 #define STR_APOSTROPHE "'" 821 #define STR_LEFT_PARENTHESIS "(" 822 #define STR_RIGHT_PARENTHESIS ")" 823 #define STR_ASTERISK "*" 824 #define STR_PLUS "+" 825 #define STR_COMMA "," 826 #define STR_MINUS "-" 827 #define STR_DOT "." 828 #define STR_SLASH "/" 829 #define STR_0 "0" 830 #define STR_1 "1" 831 #define STR_2 "2" 832 #define STR_3 "3" 833 #define STR_4 "4" 834 #define STR_5 "5" 835 #define STR_6 "6" 836 #define STR_7 "7" 837 #define STR_8 "8" 838 #define STR_9 "9" 839 #define STR_COLON ":" 840 #define STR_SEMICOLON ";" 841 #define STR_LESS_THAN_SIGN "<" 842 #define STR_EQUALS_SIGN "=" 843 #define STR_GREATER_THAN_SIGN ">" 844 #define STR_QUESTION_MARK "?" 845 #define STR_COMMERCIAL_AT "@" 846 #define STR_A "A" 847 #define STR_B "B" 848 #define STR_C "C" 849 #define STR_D "D" 850 #define STR_E "E" 851 #define STR_F "F" 852 #define STR_G "G" 853 #define STR_H "H" 854 #define STR_I "I" 855 #define STR_J "J" 856 #define STR_K "K" 857 #define STR_L "L" 858 #define STR_M "M" 859 #define STR_N "N" 860 #define STR_O "O" 861 #define STR_P "P" 862 #define STR_Q "Q" 863 #define STR_R "R" 864 #define STR_S "S" 865 #define STR_T "T" 866 #define STR_U "U" 867 #define STR_V "V" 868 #define STR_W "W" 869 #define STR_X "X" 870 #define STR_Y "Y" 871 #define STR_Z "Z" 872 #define STR_LEFT_SQUARE_BRACKET "[" 873 #define STR_BACKSLASH "\\" 874 #define STR_RIGHT_SQUARE_BRACKET "]" 875 #define STR_CIRCUMFLEX_ACCENT "^" 876 #define STR_UNDERSCORE "_" 877 #define STR_GRAVE_ACCENT "`" 878 #define STR_a "a" 879 #define STR_b "b" 880 #define STR_c "c" 881 #define STR_d "d" 882 #define STR_e "e" 883 #define STR_f "f" 884 #define STR_g "g" 885 #define STR_h "h" 886 #define STR_i "i" 887 #define STR_j "j" 888 #define STR_k "k" 889 #define STR_l "l" 890 #define STR_m "m" 891 #define STR_n "n" 892 #define STR_o "o" 893 #define STR_p "p" 894 #define STR_q "q" 895 #define STR_r "r" 896 #define STR_s "s" 897 #define STR_t "t" 898 #define STR_u "u" 899 #define STR_v "v" 900 #define STR_w "w" 901 #define STR_x "x" 902 #define STR_y "y" 903 #define STR_z "z" 904 #define STR_LEFT_CURLY_BRACKET "{" 905 #define STR_VERTICAL_LINE "|" 906 #define STR_RIGHT_CURLY_BRACKET "}" 907 #define STR_TILDE "~" 908 909 #define STRING_ACCEPT0 "ACCEPT\0" 910 #define STRING_COMMIT0 "COMMIT\0" 911 #define STRING_F0 "F\0" 912 #define STRING_FAIL0 "FAIL\0" 913 #define STRING_MARK0 "MARK\0" 914 #define STRING_PRUNE0 "PRUNE\0" 915 #define STRING_SKIP0 "SKIP\0" 916 #define STRING_THEN "THEN" 917 918 #define STRING_alpha0 "alpha\0" 919 #define STRING_lower0 "lower\0" 920 #define STRING_upper0 "upper\0" 921 #define STRING_alnum0 "alnum\0" 922 #define STRING_ascii0 "ascii\0" 923 #define STRING_blank0 "blank\0" 924 #define STRING_cntrl0 "cntrl\0" 925 #define STRING_digit0 "digit\0" 926 #define STRING_graph0 "graph\0" 927 #define STRING_print0 "print\0" 928 #define STRING_punct0 "punct\0" 929 #define STRING_space0 "space\0" 930 #define STRING_word0 "word\0" 931 #define STRING_xdigit "xdigit" 932 933 #define STRING_DEFINE "DEFINE" 934 935 #define STRING_CR_RIGHTPAR "CR)" 936 #define STRING_LF_RIGHTPAR "LF)" 937 #define STRING_CRLF_RIGHTPAR "CRLF)" 938 #define STRING_ANY_RIGHTPAR "ANY)" 939 #define STRING_ANYCRLF_RIGHTPAR "ANYCRLF)" 940 #define STRING_BSR_ANYCRLF_RIGHTPAR "BSR_ANYCRLF)" 941 #define STRING_BSR_UNICODE_RIGHTPAR "BSR_UNICODE)" 942 #define STRING_UTF8_RIGHTPAR "UTF8)" 943 #define STRING_UCP_RIGHTPAR "UCP)" 944 #define STRING_NO_START_OPT_RIGHTPAR "NO_START_OPT)" 945 946 #else /* SUPPORT_UTF8 */ 947 948 /* UTF-8 support is enabled; always use UTF-8 (=ASCII) character codes. This 949 works in both modes non-EBCDIC platforms, and on EBCDIC platforms in UTF-8 mode 950 only. */ 951 952 #define CHAR_HT '\011' 953 #define CHAR_VT '\013' 954 #define CHAR_FF '\014' 955 #define CHAR_CR '\015' 956 #define CHAR_NL '\012' 957 #define CHAR_BS '\010' 958 #define CHAR_BEL '\007' 959 #define CHAR_ESC '\033' 960 #define CHAR_DEL '\177' 961 962 #define CHAR_SPACE '\040' 963 #define CHAR_EXCLAMATION_MARK '\041' 964 #define CHAR_QUOTATION_MARK '\042' 965 #define CHAR_NUMBER_SIGN '\043' 966 #define CHAR_DOLLAR_SIGN '\044' 967 #define CHAR_PERCENT_SIGN '\045' 968 #define CHAR_AMPERSAND '\046' 969 #define CHAR_APOSTROPHE '\047' 970 #define CHAR_LEFT_PARENTHESIS '\050' 971 #define CHAR_RIGHT_PARENTHESIS '\051' 972 #define CHAR_ASTERISK '\052' 973 #define CHAR_PLUS '\053' 974 #define CHAR_COMMA '\054' 975 #define CHAR_MINUS '\055' 976 #define CHAR_DOT '\056' 977 #define CHAR_SLASH '\057' 978 #define CHAR_0 '\060' 979 #define CHAR_1 '\061' 980 #define CHAR_2 '\062' 981 #define CHAR_3 '\063' 982 #define CHAR_4 '\064' 983 #define CHAR_5 '\065' 984 #define CHAR_6 '\066' 985 #define CHAR_7 '\067' 986 #define CHAR_8 '\070' 987 #define CHAR_9 '\071' 988 #define CHAR_COLON '\072' 989 #define CHAR_SEMICOLON '\073' 990 #define CHAR_LESS_THAN_SIGN '\074' 991 #define CHAR_EQUALS_SIGN '\075' 992 #define CHAR_GREATER_THAN_SIGN '\076' 993 #define CHAR_QUESTION_MARK '\077' 994 #define CHAR_COMMERCIAL_AT '\100' 995 #define CHAR_A '\101' 996 #define CHAR_B '\102' 997 #define CHAR_C '\103' 998 #define CHAR_D '\104' 999 #define CHAR_E '\105' 1000 #define CHAR_F '\106' 1001 #define CHAR_G '\107' 1002 #define CHAR_H '\110' 1003 #define CHAR_I '\111' 1004 #define CHAR_J '\112' 1005 #define CHAR_K '\113' 1006 #define CHAR_L '\114' 1007 #define CHAR_M '\115' 1008 #define CHAR_N '\116' 1009 #define CHAR_O '\117' 1010 #define CHAR_P '\120' 1011 #define CHAR_Q '\121' 1012 #define CHAR_R '\122' 1013 #define CHAR_S '\123' 1014 #define CHAR_T '\124' 1015 #define CHAR_U '\125' 1016 #define CHAR_V '\126' 1017 #define CHAR_W '\127' 1018 #define CHAR_X '\130' 1019 #define CHAR_Y '\131' 1020 #define CHAR_Z '\132' 1021 #define CHAR_LEFT_SQUARE_BRACKET '\133' 1022 #define CHAR_BACKSLASH '\134' 1023 #define CHAR_RIGHT_SQUARE_BRACKET '\135' 1024 #define CHAR_CIRCUMFLEX_ACCENT '\136' 1025 #define CHAR_UNDERSCORE '\137' 1026 #define CHAR_GRAVE_ACCENT '\140' 1027 #define CHAR_a '\141' 1028 #define CHAR_b '\142' 1029 #define CHAR_c '\143' 1030 #define CHAR_d '\144' 1031 #define CHAR_e '\145' 1032 #define CHAR_f '\146' 1033 #define CHAR_g '\147' 1034 #define CHAR_h '\150' 1035 #define CHAR_i '\151' 1036 #define CHAR_j '\152' 1037 #define CHAR_k '\153' 1038 #define CHAR_l '\154' 1039 #define CHAR_m '\155' 1040 #define CHAR_n '\156' 1041 #define CHAR_o '\157' 1042 #define CHAR_p '\160' 1043 #define CHAR_q '\161' 1044 #define CHAR_r '\162' 1045 #define CHAR_s '\163' 1046 #define CHAR_t '\164' 1047 #define CHAR_u '\165' 1048 #define CHAR_v '\166' 1049 #define CHAR_w '\167' 1050 #define CHAR_x '\170' 1051 #define CHAR_y '\171' 1052 #define CHAR_z '\172' 1053 #define CHAR_LEFT_CURLY_BRACKET '\173' 1054 #define CHAR_VERTICAL_LINE '\174' 1055 #define CHAR_RIGHT_CURLY_BRACKET '\175' 1056 #define CHAR_TILDE '\176' 1057 1058 #define STR_HT "\011" 1059 #define STR_VT "\013" 1060 #define STR_FF "\014" 1061 #define STR_CR "\015" 1062 #define STR_NL "\012" 1063 #define STR_BS "\010" 1064 #define STR_BEL "\007" 1065 #define STR_ESC "\033" 1066 #define STR_DEL "\177" 1067 1068 #define STR_SPACE "\040" 1069 #define STR_EXCLAMATION_MARK "\041" 1070 #define STR_QUOTATION_MARK "\042" 1071 #define STR_NUMBER_SIGN "\043" 1072 #define STR_DOLLAR_SIGN "\044" 1073 #define STR_PERCENT_SIGN "\045" 1074 #define STR_AMPERSAND "\046" 1075 #define STR_APOSTROPHE "\047" 1076 #define STR_LEFT_PARENTHESIS "\050" 1077 #define STR_RIGHT_PARENTHESIS "\051" 1078 #define STR_ASTERISK "\052" 1079 #define STR_PLUS "\053" 1080 #define STR_COMMA "\054" 1081 #define STR_MINUS "\055" 1082 #define STR_DOT "\056" 1083 #define STR_SLASH "\057" 1084 #define STR_0 "\060" 1085 #define STR_1 "\061" 1086 #define STR_2 "\062" 1087 #define STR_3 "\063" 1088 #define STR_4 "\064" 1089 #define STR_5 "\065" 1090 #define STR_6 "\066" 1091 #define STR_7 "\067" 1092 #define STR_8 "\070" 1093 #define STR_9 "\071" 1094 #define STR_COLON "\072" 1095 #define STR_SEMICOLON "\073" 1096 #define STR_LESS_THAN_SIGN "\074" 1097 #define STR_EQUALS_SIGN "\075" 1098 #define STR_GREATER_THAN_SIGN "\076" 1099 #define STR_QUESTION_MARK "\077" 1100 #define STR_COMMERCIAL_AT "\100" 1101 #define STR_A "\101" 1102 #define STR_B "\102" 1103 #define STR_C "\103" 1104 #define STR_D "\104" 1105 #define STR_E "\105" 1106 #define STR_F "\106" 1107 #define STR_G "\107" 1108 #define STR_H "\110" 1109 #define STR_I "\111" 1110 #define STR_J "\112" 1111 #define STR_K "\113" 1112 #define STR_L "\114" 1113 #define STR_M "\115" 1114 #define STR_N "\116" 1115 #define STR_O "\117" 1116 #define STR_P "\120" 1117 #define STR_Q "\121" 1118 #define STR_R "\122" 1119 #define STR_S "\123" 1120 #define STR_T "\124" 1121 #define STR_U "\125" 1122 #define STR_V "\126" 1123 #define STR_W "\127" 1124 #define STR_X "\130" 1125 #define STR_Y "\131" 1126 #define STR_Z "\132" 1127 #define STR_LEFT_SQUARE_BRACKET "\133" 1128 #define STR_BACKSLASH "\134" 1129 #define STR_RIGHT_SQUARE_BRACKET "\135" 1130 #define STR_CIRCUMFLEX_ACCENT "\136" 1131 #define STR_UNDERSCORE "\137" 1132 #define STR_GRAVE_ACCENT "\140" 1133 #define STR_a "\141" 1134 #define STR_b "\142" 1135 #define STR_c "\143" 1136 #define STR_d "\144" 1137 #define STR_e "\145" 1138 #define STR_f "\146" 1139 #define STR_g "\147" 1140 #define STR_h "\150" 1141 #define STR_i "\151" 1142 #define STR_j "\152" 1143 #define STR_k "\153" 1144 #define STR_l "\154" 1145 #define STR_m "\155" 1146 #define STR_n "\156" 1147 #define STR_o "\157" 1148 #define STR_p "\160" 1149 #define STR_q "\161" 1150 #define STR_r "\162" 1151 #define STR_s "\163" 1152 #define STR_t "\164" 1153 #define STR_u "\165" 1154 #define STR_v "\166" 1155 #define STR_w "\167" 1156 #define STR_x "\170" 1157 #define STR_y "\171" 1158 #define STR_z "\172" 1159 #define STR_LEFT_CURLY_BRACKET "\173" 1160 #define STR_VERTICAL_LINE "\174" 1161 #define STR_RIGHT_CURLY_BRACKET "\175" 1162 #define STR_TILDE "\176" 1163 1164 #define STRING_ACCEPT0 STR_A STR_C STR_C STR_E STR_P STR_T "\0" 1165 #define STRING_COMMIT0 STR_C STR_O STR_M STR_M STR_I STR_T "\0" 1166 #define STRING_F0 STR_F "\0" 1167 #define STRING_FAIL0 STR_F STR_A STR_I STR_L "\0" 1168 #define STRING_MARK0 STR_M STR_A STR_R STR_K "\0" 1169 #define STRING_PRUNE0 STR_P STR_R STR_U STR_N STR_E "\0" 1170 #define STRING_SKIP0 STR_S STR_K STR_I STR_P "\0" 1171 #define STRING_THEN STR_T STR_H STR_E STR_N 1172 1173 #define STRING_alpha0 STR_a STR_l STR_p STR_h STR_a "\0" 1174 #define STRING_lower0 STR_l STR_o STR_w STR_e STR_r "\0" 1175 #define STRING_upper0 STR_u STR_p STR_p STR_e STR_r "\0" 1176 #define STRING_alnum0 STR_a STR_l STR_n STR_u STR_m "\0" 1177 #define STRING_ascii0 STR_a STR_s STR_c STR_i STR_i "\0" 1178 #define STRING_blank0 STR_b STR_l STR_a STR_n STR_k "\0" 1179 #define STRING_cntrl0 STR_c STR_n STR_t STR_r STR_l "\0" 1180 #define STRING_digit0 STR_d STR_i STR_g STR_i STR_t "\0" 1181 #define STRING_graph0 STR_g STR_r STR_a STR_p STR_h "\0" 1182 #define STRING_print0 STR_p STR_r STR_i STR_n STR_t "\0" 1183 #define STRING_punct0 STR_p STR_u STR_n STR_c STR_t "\0" 1184 #define STRING_space0 STR_s STR_p STR_a STR_c STR_e "\0" 1185 #define STRING_word0 STR_w STR_o STR_r STR_d "\0" 1186 #define STRING_xdigit STR_x STR_d STR_i STR_g STR_i STR_t 1187 1188 #define STRING_DEFINE STR_D STR_E STR_F STR_I STR_N STR_E 1189 1190 #define STRING_CR_RIGHTPAR STR_C STR_R STR_RIGHT_PARENTHESIS 1191 #define STRING_LF_RIGHTPAR STR_L STR_F STR_RIGHT_PARENTHESIS 1192 #define STRING_CRLF_RIGHTPAR STR_C STR_R STR_L STR_F STR_RIGHT_PARENTHESIS 1193 #define STRING_ANY_RIGHTPAR STR_A STR_N STR_Y STR_RIGHT_PARENTHESIS 1194 #define STRING_ANYCRLF_RIGHTPAR STR_A STR_N STR_Y STR_C STR_R STR_L STR_F STR_RIGHT_PARENTHESIS 1195 #define STRING_BSR_ANYCRLF_RIGHTPAR STR_B STR_S STR_R STR_UNDERSCORE STR_A STR_N STR_Y STR_C STR_R STR_L STR_F STR_RIGHT_PARENTHESIS 1196 #define STRING_BSR_UNICODE_RIGHTPAR STR_B STR_S STR_R STR_UNDERSCORE STR_U STR_N STR_I STR_C STR_O STR_D STR_E STR_RIGHT_PARENTHESIS 1197 #define STRING_UTF8_RIGHTPAR STR_U STR_T STR_F STR_8 STR_RIGHT_PARENTHESIS 1198 #define STRING_UCP_RIGHTPAR STR_U STR_C STR_P STR_RIGHT_PARENTHESIS 1199 #define STRING_NO_START_OPT_RIGHTPAR STR_N STR_O STR_UNDERSCORE STR_S STR_T STR_A STR_R STR_T STR_UNDERSCORE STR_O STR_P STR_T STR_RIGHT_PARENTHESIS 1200 1201 #endif /* SUPPORT_UTF8 */ 1202 1203 /* Escape items that are just an encoding of a particular data value. */ 1204 1205 #ifndef ESC_e 1206 #define ESC_e CHAR_ESC 1207 #endif 1208 1209 #ifndef ESC_f 1210 #define ESC_f CHAR_FF 1211 #endif 1212 1213 #ifndef ESC_n 1214 #define ESC_n CHAR_NL 1215 #endif 1216 1217 #ifndef ESC_r 1218 #define ESC_r CHAR_CR 1219 #endif 1220 1221 /* We can't officially use ESC_t because it is a POSIX reserved identifier 1222 (presumably because of all the others like size_t). */ 1223 1224 #ifndef ESC_tee 1225 #define ESC_tee CHAR_HT 1226 #endif 1227 1228 /* Codes for different types of Unicode property */ 1229 1230 #define PT_ANY 0 /* Any property - matches all chars */ 1231 #define PT_LAMP 1 /* L& - the union of Lu, Ll, Lt */ 1232 #define PT_GC 2 /* Specified general characteristic (e.g. L) */ 1233 #define PT_PC 3 /* Specified particular characteristic (e.g. Lu) */ 1234 #define PT_SC 4 /* Script (e.g. Han) */ 1235 #define PT_ALNUM 5 /* Alphanumeric - the union of L and N */ 1236 #define PT_SPACE 6 /* Perl space - Z plus 9,10,12,13 */ 1237 #define PT_PXSPACE 7 /* POSIX space - Z plus 9,10,11,12,13 */ 1238 #define PT_WORD 8 /* Word - L plus N plus underscore */ 1239 1240 /* Flag bits and data types for the extended class (OP_XCLASS) for classes that 1241 contain UTF-8 characters with values greater than 255. */ 1242 1243 #define XCL_NOT 0x01 /* Flag: this is a negative class */ 1244 #define XCL_MAP 0x02 /* Flag: a 32-byte map is present */ 1245 1246 #define XCL_END 0 /* Marks end of individual items */ 1247 #define XCL_SINGLE 1 /* Single item (one multibyte char) follows */ 1248 #define XCL_RANGE 2 /* A range (two multibyte chars) follows */ 1249 #define XCL_PROP 3 /* Unicode property (2-byte property code follows) */ 1250 #define XCL_NOTPROP 4 /* Unicode inverted property (ditto) */ 1251 1252 /* These are escaped items that aren't just an encoding of a particular data 1253 value such as \n. They must have non-zero values, as check_escape() returns 1254 their negation. Also, they must appear in the same order as in the opcode 1255 definitions below, up to ESC_z. There's a dummy for OP_ALLANY because it 1256 corresponds to "." in DOTALL mode rather than an escape sequence. It is also 1257 used for [^] in JavaScript compatibility mode. In non-DOTALL mode, "." behaves 1258 like \N. 1259 1260 The special values ESC_DU, ESC_du, etc. are used instead of ESC_D, ESC_d, etc. 1261 when PCRE_UCP is set, when replacement of \d etc by \p sequences is required. 1262 They must be contiguous, and remain in order so that the replacements can be 1263 looked up from a table. 1264 1265 The final escape must be ESC_REF as subsequent values are used for 1266 backreferences (\1, \2, \3, etc). There are two tests in the code for an escape 1267 greater than ESC_b and less than ESC_Z to detect the types that may be 1268 repeated. These are the types that consume characters. If any new escapes are 1269 put in between that don't consume a character, that code will have to change. 1270 */ 1271 1272 enum { ESC_A = 1, ESC_G, ESC_K, ESC_B, ESC_b, ESC_D, ESC_d, ESC_S, ESC_s, 1273 ESC_W, ESC_w, ESC_N, ESC_dum, ESC_C, ESC_P, ESC_p, ESC_R, ESC_H, 1274 ESC_h, ESC_V, ESC_v, ESC_X, ESC_Z, ESC_z, 1275 ESC_E, ESC_Q, ESC_g, ESC_k, 1276 ESC_DU, ESC_du, ESC_SU, ESC_su, ESC_WU, ESC_wu, 1277 ESC_REF }; 1278 1279 /* Opcode table: Starting from 1 (i.e. after OP_END), the values up to 1280 OP_EOD must correspond in order to the list of escapes immediately above. 1281 1282 *** NOTE NOTE NOTE *** Whenever this list is updated, the two macro definitions 1283 that follow must also be updated to match. There are also tables called 1284 "coptable" and "poptable" in pcre_dfa_exec.c that must be updated. */ 1285 1286 enum { 1287 OP_END, /* 0 End of pattern */ 1288 1289 /* Values corresponding to backslashed metacharacters */ 1290 1291 OP_SOD, /* 1 Start of data: \A */ 1292 OP_SOM, /* 2 Start of match (subject + offset): \G */ 1293 OP_SET_SOM, /* 3 Set start of match (\K) */ 1294 OP_NOT_WORD_BOUNDARY, /* 4 \B */ 1295 OP_WORD_BOUNDARY, /* 5 \b */ 1296 OP_NOT_DIGIT, /* 6 \D */ 1297 OP_DIGIT, /* 7 \d */ 1298 OP_NOT_WHITESPACE, /* 8 \S */ 1299 OP_WHITESPACE, /* 9 \s */ 1300 OP_NOT_WORDCHAR, /* 10 \W */ 1301 OP_WORDCHAR, /* 11 \w */ 1302 OP_ANY, /* 12 Match any character except newline */ 1303 OP_ALLANY, /* 13 Match any character */ 1304 OP_ANYBYTE, /* 14 Match any byte (\C); different to OP_ANY for UTF-8 */ 1305 OP_NOTPROP, /* 15 \P (not Unicode property) */ 1306 OP_PROP, /* 16 \p (Unicode property) */ 1307 OP_ANYNL, /* 17 \R (any newline sequence) */ 1308 OP_NOT_HSPACE, /* 18 \H (not horizontal whitespace) */ 1309 OP_HSPACE, /* 19 \h (horizontal whitespace) */ 1310 OP_NOT_VSPACE, /* 20 \V (not vertical whitespace) */ 1311 OP_VSPACE, /* 21 \v (vertical whitespace) */ 1312 OP_EXTUNI, /* 22 \X (extended Unicode sequence */ 1313 OP_EODN, /* 23 End of data or \n at end of data: \Z. */ 1314 OP_EOD, /* 24 End of data: \z */ 1315 1316 OP_OPT, /* 25 Set runtime options */ 1317 OP_CIRC, /* 26 Start of line - varies with multiline switch */ 1318 OP_DOLL, /* 27 End of line - varies with multiline switch */ 1319 OP_CHAR, /* 28 Match one character, casefully */ 1320 OP_CHARNC, /* 29 Match one character, caselessly */ 1321 OP_NOT, /* 30 Match one character, not the following one */ 1322 1323 OP_STAR, /* 31 The maximizing and minimizing versions of */ 1324 OP_MINSTAR, /* 32 these six opcodes must come in pairs, with */ 1325 OP_PLUS, /* 33 the minimizing one second. */ 1326 OP_MINPLUS, /* 34 This first set applies to single characters.*/ 1327 OP_QUERY, /* 35 */ 1328 OP_MINQUERY, /* 36 */ 1329 1330 OP_UPTO, /* 37 From 0 to n matches */ 1331 OP_MINUPTO, /* 38 */ 1332 OP_EXACT, /* 39 Exactly n matches */ 1333 1334 OP_POSSTAR, /* 40 Possessified star */ 1335 OP_POSPLUS, /* 41 Possessified plus */ 1336 OP_POSQUERY, /* 42 Posesssified query */ 1337 OP_POSUPTO, /* 43 Possessified upto */ 1338 1339 OP_NOTSTAR, /* 44 The maximizing and minimizing versions of */ 1340 OP_NOTMINSTAR, /* 45 these six opcodes must come in pairs, with */ 1341 OP_NOTPLUS, /* 46 the minimizing one second. They must be in */ 1342 OP_NOTMINPLUS, /* 47 exactly the same order as those above. */ 1343 OP_NOTQUERY, /* 48 This set applies to "not" single characters. */ 1344 OP_NOTMINQUERY, /* 49 */ 1345 1346 OP_NOTUPTO, /* 50 From 0 to n matches */ 1347 OP_NOTMINUPTO, /* 51 */ 1348 OP_NOTEXACT, /* 52 Exactly n matches */ 1349 1350 OP_NOTPOSSTAR, /* 53 Possessified versions */ 1351 OP_NOTPOSPLUS, /* 54 */ 1352 OP_NOTPOSQUERY, /* 55 */ 1353 OP_NOTPOSUPTO, /* 56 */ 1354 1355 OP_TYPESTAR, /* 57 The maximizing and minimizing versions of */ 1356 OP_TYPEMINSTAR, /* 58 these six opcodes must come in pairs, with */ 1357 OP_TYPEPLUS, /* 59 the minimizing one second. These codes must */ 1358 OP_TYPEMINPLUS, /* 60 be in exactly the same order as those above. */ 1359 OP_TYPEQUERY, /* 61 This set applies to character types such as \d */ 1360 OP_TYPEMINQUERY, /* 62 */ 1361 1362 OP_TYPEUPTO, /* 63 From 0 to n matches */ 1363 OP_TYPEMINUPTO, /* 64 */ 1364 OP_TYPEEXACT, /* 65 Exactly n matches */ 1365 1366 OP_TYPEPOSSTAR, /* 66 Possessified versions */ 1367 OP_TYPEPOSPLUS, /* 67 */ 1368 OP_TYPEPOSQUERY, /* 68 */ 1369 OP_TYPEPOSUPTO, /* 69 */ 1370 1371 OP_CRSTAR, /* 70 The maximizing and minimizing versions of */ 1372 OP_CRMINSTAR, /* 71 all these opcodes must come in pairs, with */ 1373 OP_CRPLUS, /* 72 the minimizing one second. These codes must */ 1374 OP_CRMINPLUS, /* 73 be in exactly the same order as those above. */ 1375 OP_CRQUERY, /* 74 These are for character classes and back refs */ 1376 OP_CRMINQUERY, /* 75 */ 1377 OP_CRRANGE, /* 76 These are different to the three sets above. */ 1378 OP_CRMINRANGE, /* 77 */ 1379 1380 OP_CLASS, /* 78 Match a character class, chars < 256 only */ 1381 OP_NCLASS, /* 79 Same, but the bitmap was created from a negative 1382 class - the difference is relevant only when a UTF-8 1383 character > 255 is encountered. */ 1384 1385 OP_XCLASS, /* 80 Extended class for handling UTF-8 chars within the 1386 class. This does both positive and negative. */ 1387 1388 OP_REF, /* 81 Match a back reference */ 1389 OP_RECURSE, /* 82 Match a numbered subpattern (possibly recursive) */ 1390 OP_CALLOUT, /* 83 Call out to external function if provided */ 1391 1392 OP_ALT, /* 84 Start of alternation */ 1393 OP_KET, /* 85 End of group that doesn't have an unbounded repeat */ 1394 OP_KETRMAX, /* 86 These two must remain together and in this */ 1395 OP_KETRMIN, /* 87 order. They are for groups the repeat for ever. */ 1396 1397 /* The assertions must come before BRA, CBRA, ONCE, and COND.*/ 1398 1399 OP_ASSERT, /* 88 Positive lookahead */ 1400 OP_ASSERT_NOT, /* 89 Negative lookahead */ 1401 OP_ASSERTBACK, /* 90 Positive lookbehind */ 1402 OP_ASSERTBACK_NOT, /* 91 Negative lookbehind */ 1403 OP_REVERSE, /* 92 Move pointer back - used in lookbehind assertions */ 1404 1405 /* ONCE, BRA, CBRA, and COND must come after the assertions, with ONCE first, 1406 as there's a test for >= ONCE for a subpattern that isn't an assertion. */ 1407 1408 OP_ONCE, /* 93 Atomic group */ 1409 OP_BRA, /* 94 Start of non-capturing bracket */ 1410 OP_CBRA, /* 95 Start of capturing bracket */ 1411 OP_COND, /* 96 Conditional group */ 1412 1413 /* These three must follow the previous three, in the same order. There's a 1414 check for >= SBRA to distinguish the two sets. */ 1415 1416 OP_SBRA, /* 97 Start of non-capturing bracket, check empty */ 1417 OP_SCBRA, /* 98 Start of capturing bracket, check empty */ 1418 OP_SCOND, /* 99 Conditional group, check empty */ 1419 1420 /* The next two pairs must (respectively) be kept together. */ 1421 1422 OP_CREF, /* 100 Used to hold a capture number as condition */ 1423 OP_NCREF, /* 101 Same, but generaged by a name reference*/ 1424 OP_RREF, /* 102 Used to hold a recursion number as condition */ 1425 OP_NRREF, /* 103 Same, but generaged by a name reference*/ 1426 OP_DEF, /* 104 The DEFINE condition */ 1427 1428 OP_BRAZERO, /* 105 These two must remain together and in this */ 1429 OP_BRAMINZERO, /* 106 order. */ 1430 1431 /* These are backtracking control verbs */ 1432 1433 OP_MARK, /* 107 always has an argument */ 1434 OP_PRUNE, /* 108 */ 1435 OP_PRUNE_ARG, /* 109 same, but with argument */ 1436 OP_SKIP, /* 110 */ 1437 OP_SKIP_ARG, /* 111 same, but with argument */ 1438 OP_THEN, /* 112 */ 1439 OP_THEN_ARG, /* 113 same, but with argument */ 1440 OP_COMMIT, /* 114 */ 1441 1442 /* These are forced failure and success verbs */ 1443 1444 OP_FAIL, /* 115 */ 1445 OP_ACCEPT, /* 116 */ 1446 OP_CLOSE, /* 117 Used before OP_ACCEPT to close open captures */ 1447 1448 /* This is used to skip a subpattern with a {0} quantifier */ 1449 1450 OP_SKIPZERO, /* 118 */ 1451 1452 /* This is not an opcode, but is used to check that tables indexed by opcode 1453 are the correct length, in order to catch updating errors - there have been 1454 some in the past. */ 1455 1456 OP_TABLE_LENGTH 1457 }; 1458 1459 /* *** NOTE NOTE NOTE *** Whenever the list above is updated, the two macro 1460 definitions that follow must also be updated to match. There are also tables 1461 called "coptable" and "poptable" in pcre_dfa_exec.c that must be updated. */ 1462 1463 1464 /* This macro defines textual names for all the opcodes. These are used only 1465 for debugging. The macro is referenced only in pcre_printint.c. */ 1466 1467 #define OP_NAME_LIST \ 1468 "End", "\\A", "\\G", "\\K", "\\B", "\\b", "\\D", "\\d", \ 1469 "\\S", "\\s", "\\W", "\\w", "Any", "AllAny", "Anybyte", \ 1470 "notprop", "prop", "\\R", "\\H", "\\h", "\\V", "\\v", \ 1471 "extuni", "\\Z", "\\z", \ 1472 "Opt", "^", "$", "char", "charnc", "not", \ 1473 "*", "*?", "+", "+?", "?", "??", "{", "{", "{", \ 1474 "*+","++", "?+", "{", \ 1475 "*", "*?", "+", "+?", "?", "??", "{", "{", "{", \ 1476 "*+","++", "?+", "{", \ 1477 "*", "*?", "+", "+?", "?", "??", "{", "{", "{", \ 1478 "*+","++", "?+", "{", \ 1479 "*", "*?", "+", "+?", "?", "??", "{", "{", \ 1480 "class", "nclass", "xclass", "Ref", "Recurse", "Callout", \ 1481 "Alt", "Ket", "KetRmax", "KetRmin", "Assert", "Assert not", \ 1482 "AssertB", "AssertB not", "Reverse", \ 1483 "Once", "Bra", "CBra", "Cond", "SBra", "SCBra", "SCond", \ 1484 "Cond ref", "Cond nref", "Cond rec", "Cond nrec", "Cond def", \ 1485 "Brazero", "Braminzero", \ 1486 "*MARK", "*PRUNE", "*PRUNE", "*SKIP", "*SKIP", \ 1487 "*THEN", "*THEN", "*COMMIT", "*FAIL", "*ACCEPT", \ 1488 "Close", "Skip zero" 1489 1490 1491 /* This macro defines the length of fixed length operations in the compiled 1492 regex. The lengths are used when searching for specific things, and also in the 1493 debugging printing of a compiled regex. We use a macro so that it can be 1494 defined close to the definitions of the opcodes themselves. 1495 1496 As things have been extended, some of these are no longer fixed lenths, but are 1497 minima instead. For example, the length of a single-character repeat may vary 1498 in UTF-8 mode. The code that uses this table must know about such things. */ 1499 1500 #define OP_LENGTHS \ 1501 1, /* End */ \ 1502 1, 1, 1, 1, 1, /* \A, \G, \K, \B, \b */ \ 1503 1, 1, 1, 1, 1, 1, /* \D, \d, \S, \s, \W, \w */ \ 1504 1, 1, 1, /* Any, AllAny, Anybyte */ \ 1505 3, 3, /* \P, \p */ \ 1506 1, 1, 1, 1, 1, /* \R, \H, \h, \V, \v */ \ 1507 1, /* \X */ \ 1508 1, 1, 2, 1, 1, /* \Z, \z, Opt, ^, $ */ \ 1509 2, /* Char - the minimum length */ \ 1510 2, /* Charnc - the minimum length */ \ 1511 2, /* not */ \ 1512 /* Positive single-char repeats ** These are */ \ 1513 2, 2, 2, 2, 2, 2, /* *, *?, +, +?, ?, ?? ** minima in */ \ 1514 4, 4, 4, /* upto, minupto, exact ** UTF-8 mode */ \ 1515 2, 2, 2, 4, /* *+, ++, ?+, upto+ */ \ 1516 /* Negative single-char repeats - only for chars < 256 */ \ 1517 2, 2, 2, 2, 2, 2, /* NOT *, *?, +, +?, ?, ?? */ \ 1518 4, 4, 4, /* NOT upto, minupto, exact */ \ 1519 2, 2, 2, 4, /* Possessive *, +, ?, upto */ \ 1520 /* Positive type repeats */ \ 1521 2, 2, 2, 2, 2, 2, /* Type *, *?, +, +?, ?, ?? */ \ 1522 4, 4, 4, /* Type upto, minupto, exact */ \ 1523 2, 2, 2, 4, /* Possessive *+, ++, ?+, upto+ */ \ 1524 /* Character class & ref repeats */ \ 1525 1, 1, 1, 1, 1, 1, /* *, *?, +, +?, ?, ?? */ \ 1526 5, 5, /* CRRANGE, CRMINRANGE */ \ 1527 33, /* CLASS */ \ 1528 33, /* NCLASS */ \ 1529 0, /* XCLASS - variable length */ \ 1530 3, /* REF */ \ 1531 1+LINK_SIZE, /* RECURSE */ \ 1532 2+2*LINK_SIZE, /* CALLOUT */ \ 1533 1+LINK_SIZE, /* Alt */ \ 1534 1+LINK_SIZE, /* Ket */ \ 1535 1+LINK_SIZE, /* KetRmax */ \ 1536 1+LINK_SIZE, /* KetRmin */ \ 1537 1+LINK_SIZE, /* Assert */ \ 1538 1+LINK_SIZE, /* Assert not */ \ 1539 1+LINK_SIZE, /* Assert behind */ \ 1540 1+LINK_SIZE, /* Assert behind not */ \ 1541 1+LINK_SIZE, /* Reverse */ \ 1542 1+LINK_SIZE, /* ONCE */ \ 1543 1+LINK_SIZE, /* BRA */ \ 1544 3+LINK_SIZE, /* CBRA */ \ 1545 1+LINK_SIZE, /* COND */ \ 1546 1+LINK_SIZE, /* SBRA */ \ 1547 3+LINK_SIZE, /* SCBRA */ \ 1548 1+LINK_SIZE, /* SCOND */ \ 1549 3, 3, /* CREF, NCREF */ \ 1550 3, 3, /* RREF, NRREF */ \ 1551 1, /* DEF */ \ 1552 1, 1, /* BRAZERO, BRAMINZERO */ \ 1553 3, 1, 3, /* MARK, PRUNE, PRUNE_ARG */ \ 1554 1, 3, /* SKIP, SKIP_ARG */ \ 1555 1+LINK_SIZE, 3+LINK_SIZE, /* THEN, THEN_ARG */ \ 1556 1, 1, 1, 3, 1 /* COMMIT, FAIL, ACCEPT, CLOSE, SKIPZERO */ 1557 1558 1559 /* A magic value for OP_RREF and OP_NRREF to indicate the "any recursion" 1560 condition. */ 1561 1562 #define RREF_ANY 0xffff 1563 1564 /* Compile time error code numbers. They are given names so that they can more 1565 easily be tracked. When a new number is added, the table called eint in 1566 pcreposix.c must be updated. */ 1567 1568 enum { ERR0, ERR1, ERR2, ERR3, ERR4, ERR5, ERR6, ERR7, ERR8, ERR9, 1569 ERR10, ERR11, ERR12, ERR13, ERR14, ERR15, ERR16, ERR17, ERR18, ERR19, 1570 ERR20, ERR21, ERR22, ERR23, ERR24, ERR25, ERR26, ERR27, ERR28, ERR29, 1571 ERR30, ERR31, ERR32, ERR33, ERR34, ERR35, ERR36, ERR37, ERR38, ERR39, 1572 ERR40, ERR41, ERR42, ERR43, ERR44, ERR45, ERR46, ERR47, ERR48, ERR49, 1573 ERR50, ERR51, ERR52, ERR53, ERR54, ERR55, ERR56, ERR57, ERR58, ERR59, 1574 ERR60, ERR61, ERR62, ERR63, ERR64, ERR65, ERR66, ERR67, ERR68, 1575 ERRCOUNT }; 1576 1577 /* The real format of the start of the pcre block; the index of names and the 1578 code vector run on as long as necessary after the end. We store an explicit 1579 offset to the name table so that if a regex is compiled on one host, saved, and 1580 then run on another where the size of pointers is different, all might still 1581 be well. For the case of compiled-on-4 and run-on-8, we include an extra 1582 pointer that is always NULL. For future-proofing, a few dummy fields were 1583 originally included - even though you can never get this planning right - but 1584 there is only one left now. 1585 1586 NOTE NOTE NOTE: 1587 Because people can now save and re-use compiled patterns, any additions to this 1588 structure should be made at the end, and something earlier (e.g. a new 1589 flag in the options or one of the dummy fields) should indicate that the new 1590 fields are present. Currently PCRE always sets the dummy fields to zero. 1591 NOTE NOTE NOTE 1592 */ 1593 1594 typedef struct real_pcre { 1595 pcre_uint32 magic_number; 1596 pcre_uint32 size; /* Total that was malloced */ 1597 pcre_uint32 options; /* Public options */ 1598 pcre_uint16 flags; /* Private flags */ 1599 pcre_uint16 dummy1; /* For future use */ 1600 pcre_uint16 top_bracket; 1601 pcre_uint16 top_backref; 1602 pcre_uint16 first_byte; 1603 pcre_uint16 req_byte; 1604 pcre_uint16 name_table_offset; /* Offset to name table that follows */ 1605 pcre_uint16 name_entry_size; /* Size of any name items */ 1606 pcre_uint16 name_count; /* Number of name items */ 1607 pcre_uint16 ref_count; /* Reference count */ 1608 1609 const unsigned char *tables; /* Pointer to tables or NULL for std */ 1610 const unsigned char *nullpad; /* NULL padding */ 1611 } real_pcre; 1612 1613 /* The format of the block used to store data from pcre_study(). The same 1614 remark (see NOTE above) about extending this structure applies. */ 1615 1616 typedef struct pcre_study_data { 1617 pcre_uint32 size; /* Total that was malloced */ 1618 pcre_uint32 flags; /* Private flags */ 1619 uschar start_bits[32]; /* Starting char bits */ 1620 pcre_uint32 minlength; /* Minimum subject length */ 1621 } pcre_study_data; 1622 1623 /* Structure for building a chain of open capturing subpatterns during 1624 compiling, so that instructions to close them can be compiled when (*ACCEPT) is 1625 encountered. This is also used to identify subpatterns that contain recursive 1626 back references to themselves, so that they can be made atomic. */ 1627 1628 typedef struct open_capitem { 1629 struct open_capitem *next; /* Chain link */ 1630 pcre_uint16 number; /* Capture number */ 1631 pcre_uint16 flag; /* Set TRUE if recursive back ref */ 1632 } open_capitem; 1633 1634 /* Structure for passing "static" information around between the functions 1635 doing the compiling, so that they are thread-safe. */ 1636 1637 typedef struct compile_data { 1638 const uschar *lcc; /* Points to lower casing table */ 1639 const uschar *fcc; /* Points to case-flipping table */ 1640 const uschar *cbits; /* Points to character type table */ 1641 const uschar *ctypes; /* Points to table of type maps */ 1642 const uschar *start_workspace;/* The start of working space */ 1643 const uschar *start_code; /* The start of the compiled code */ 1644 const uschar *start_pattern; /* The start of the pattern */ 1645 const uschar *end_pattern; /* The end of the pattern */ 1646 open_capitem *open_caps; /* Chain of open capture items */ 1647 uschar *hwm; /* High watermark of workspace */ 1648 uschar *name_table; /* The name/number table */ 1649 int names_found; /* Number of entries so far */ 1650 int name_entry_size; /* Size of each entry */ 1651 int bracount; /* Count of capturing parens as we compile */ 1652 int final_bracount; /* Saved value after first pass */ 1653 int top_backref; /* Maximum back reference */ 1654 unsigned int backref_map; /* Bitmap of low back refs */ 1655 int external_options; /* External (initial) options */ 1656 int external_flags; /* External flag bits to be set */ 1657 int req_varyopt; /* "After variable item" flag for reqbyte */ 1658 BOOL had_accept; /* (*ACCEPT) encountered */ 1659 BOOL check_lookbehind; /* Lookbehinds need later checking */ 1660 int nltype; /* Newline type */ 1661 int nllen; /* Newline string length */ 1662 uschar nl[4]; /* Newline string when fixed length */ 1663 } compile_data; 1664 1665 /* Structure for maintaining a chain of pointers to the currently incomplete 1666 branches, for testing for left recursion. */ 1667 1668 typedef struct branch_chain { 1669 struct branch_chain *outer; 1670 uschar *current_branch; 1671 } branch_chain; 1672 1673 /* Structure for items in a linked list that represents an explicit recursive 1674 call within the pattern. */ 1675 1676 typedef struct recursion_info { 1677 struct recursion_info *prevrec; /* Previous recursion record (or NULL) */ 1678 int group_num; /* Number of group that was called */ 1679 const uschar *after_call; /* "Return value": points after the call in the expr */ 1680 int *offset_save; /* Pointer to start of saved offsets */ 1681 int saved_max; /* Number of saved offsets */ 1682 int save_offset_top; /* Current value of offset_top */ 1683 } recursion_info; 1684 1685 /* Structure for building a chain of data for holding the values of the subject 1686 pointer at the start of each subpattern, so as to detect when an empty string 1687 has been matched by a subpattern - to break infinite loops. */ 1688 1689 typedef struct eptrblock { 1690 struct eptrblock *epb_prev; 1691 USPTR epb_saved_eptr; 1692 } eptrblock; 1693 1694 1695 /* Structure for passing "static" information around between the functions 1696 doing traditional NFA matching, so that they are thread-safe. */ 1697 1698 typedef struct match_data { 1699 unsigned long int match_call_count; /* As it says */ 1700 unsigned long int match_limit; /* As it says */ 1701 unsigned long int match_limit_recursion; /* As it says */ 1702 int *offset_vector; /* Offset vector */ 1703 int offset_end; /* One past the end */ 1704 int offset_max; /* The maximum usable for return data */ 1705 int nltype; /* Newline type */ 1706 int nllen; /* Newline string length */ 1707 int name_count; /* Number of names in name table */ 1708 int name_entry_size; /* Size of entry in names table */ 1709 uschar *name_table; /* Table of names */ 1710 uschar nl[4]; /* Newline string when fixed */ 1711 const uschar *lcc; /* Points to lower casing table */ 1712 const uschar *ctypes; /* Points to table of type maps */ 1713 BOOL offset_overflow; /* Set if too many extractions */ 1714 BOOL notbol; /* NOTBOL flag */ 1715 BOOL noteol; /* NOTEOL flag */ 1716 BOOL utf8; /* UTF8 flag */ 1717 BOOL jscript_compat; /* JAVASCRIPT_COMPAT flag */ 1718 BOOL use_ucp; /* PCRE_UCP flag */ 1719 BOOL endonly; /* Dollar not before final \n */ 1720 BOOL notempty; /* Empty string match not wanted */ 1721 BOOL notempty_atstart; /* Empty string match at start not wanted */ 1722 BOOL hitend; /* Hit the end of the subject at some point */ 1723 BOOL bsr_anycrlf; /* \R is just any CRLF, not full Unicode */ 1724 const uschar *start_code; /* For use when recursing */ 1725 USPTR start_subject; /* Start of the subject string */ 1726 USPTR end_subject; /* End of the subject string */ 1727 USPTR start_match_ptr; /* Start of matched string */ 1728 USPTR end_match_ptr; /* Subject position at end match */ 1729 USPTR start_used_ptr; /* Earliest consulted character */ 1730 int partial; /* PARTIAL options */ 1731 int end_offset_top; /* Highwater mark at end of match */ 1732 int capture_last; /* Most recent capture number */ 1733 int start_offset; /* The start offset value */ 1734 eptrblock *eptrchain; /* Chain of eptrblocks for tail recursions */ 1735 int eptrn; /* Next free eptrblock */ 1736 recursion_info *recursive; /* Linked list of recursion data */ 1737 void *callout_data; /* To pass back to callouts */ 1738 const uschar *mark; /* Mark pointer to pass back */ 1739 } match_data; 1740 1741 /* A similar structure is used for the same purpose by the DFA matching 1742 functions. */ 1743 1744 typedef struct dfa_match_data { 1745 const uschar *start_code; /* Start of the compiled pattern */ 1746 const uschar *start_subject; /* Start of the subject string */ 1747 const uschar *end_subject; /* End of subject string */ 1748 const uschar *start_used_ptr; /* Earliest consulted character */ 1749 const uschar *tables; /* Character tables */ 1750 int start_offset; /* The start offset value */ 1751 int moptions; /* Match options */ 1752 int poptions; /* Pattern options */ 1753 int nltype; /* Newline type */ 1754 int nllen; /* Newline string length */ 1755 uschar nl[4]; /* Newline string when fixed */ 1756 void *callout_data; /* To pass back to callouts */ 1757 } dfa_match_data; 1758 1759 /* Bit definitions for entries in the pcre_ctypes table. */ 1760 1761 #define ctype_space 0x01 1762 #define ctype_letter 0x02 1763 #define ctype_digit 0x04 1764 #define ctype_xdigit 0x08 1765 #define ctype_word 0x10 /* alphanumeric or '_' */ 1766 #define ctype_meta 0x80 /* regexp meta char or zero (end pattern) */ 1767 1768 /* Offsets for the bitmap tables in pcre_cbits. Each table contains a set 1769 of bits for a class map. Some classes are built by combining these tables. */ 1770 1771 #define cbit_space 0 /* [:space:] or \s */ 1772 #define cbit_xdigit 32 /* [:xdigit:] */ 1773 #define cbit_digit 64 /* [:digit:] or \d */ 1774 #define cbit_upper 96 /* [:upper:] */ 1775 #define cbit_lower 128 /* [:lower:] */ 1776 #define cbit_word 160 /* [:word:] or \w */ 1777 #define cbit_graph 192 /* [:graph:] */ 1778 #define cbit_print 224 /* [:print:] */ 1779 #define cbit_punct 256 /* [:punct:] */ 1780 #define cbit_cntrl 288 /* [:cntrl:] */ 1781 #define cbit_length 320 /* Length of the cbits table */ 1782 1783 /* Offsets of the various tables from the base tables pointer, and 1784 total length. */ 1785 1786 #define lcc_offset 0 1787 #define fcc_offset 256 1788 #define cbits_offset 512 1789 #define ctypes_offset (cbits_offset + cbit_length) 1790 #define tables_length (ctypes_offset + 256) 1791 1792 /* Layout of the UCP type table that translates property names into types and 1793 codes. Each entry used to point directly to a name, but to reduce the number of 1794 relocations in shared libraries, it now has an offset into a single string 1795 instead. */ 1796 1797 typedef struct { 1798 pcre_uint16 name_offset; 1799 pcre_uint16 type; 1800 pcre_uint16 value; 1801 } ucp_type_table; 1802 1803 1804 /* Internal shared data tables. These are tables that are used by more than one 1805 of the exported public functions. They have to be "external" in the C sense, 1806 but are not part of the PCRE public API. The data for these tables is in the 1807 pcre_tables.c module. */ 1808 1809 extern const int _pcre_utf8_table1[]; 1810 extern const int _pcre_utf8_table2[]; 1811 extern const int _pcre_utf8_table3[]; 1812 extern const uschar _pcre_utf8_table4[]; 1813 1814 extern const int _pcre_utf8_table1_size; 1815 1816 extern const char _pcre_utt_names[]; 1817 extern const ucp_type_table _pcre_utt[]; 1818 extern const int _pcre_utt_size; 1819 1820 extern const uschar _pcre_default_tables[]; 1821 1822 extern const uschar _pcre_OP_lengths[]; 1823 1824 1825 /* Internal shared functions. These are functions that are used by more than 1826 one of the exported public functions. They have to be "external" in the C 1827 sense, but are not part of the PCRE public API. */ 1828 1829 extern const uschar *_pcre_find_bracket(const uschar *, BOOL, int); 1830 extern BOOL _pcre_is_newline(USPTR, int, USPTR, int *, BOOL); 1831 extern int _pcre_ord2utf8(int, uschar *); 1832 extern real_pcre *_pcre_try_flipped(const real_pcre *, real_pcre *, 1833 const pcre_study_data *, pcre_study_data *); 1834 extern int _pcre_valid_utf8(USPTR, int); 1835 extern BOOL _pcre_was_newline(USPTR, int, USPTR, int *, BOOL); 1836 extern BOOL _pcre_xclass(int, const uschar *); 1837 1838 1839 /* Unicode character database (UCD) */ 1840 1841 typedef struct { 1842 uschar script; 1843 uschar chartype; 1844 pcre_int32 other_case; 1845 } ucd_record; 1846 1847 extern const ucd_record _pcre_ucd_records[]; 1848 extern const uschar _pcre_ucd_stage1[]; 1849 extern const pcre_uint16 _pcre_ucd_stage2[]; 1850 extern const int _pcre_ucp_gentype[]; 1851 1852 1853 /* UCD access macros */ 1854 1855 #define UCD_BLOCK_SIZE 128 1856 #define GET_UCD(ch) (_pcre_ucd_records + \ 1857 _pcre_ucd_stage2[_pcre_ucd_stage1[(ch) / UCD_BLOCK_SIZE] * \ 1858 UCD_BLOCK_SIZE + ch % UCD_BLOCK_SIZE]) 1859 1860 #define UCD_CHARTYPE(ch) GET_UCD(ch)->chartype 1861 #define UCD_SCRIPT(ch) GET_UCD(ch)->script 1862 #define UCD_CATEGORY(ch) _pcre_ucp_gentype[UCD_CHARTYPE(ch)] 1863 #define UCD_OTHERCASE(ch) (ch + GET_UCD(ch)->other_case) 1864 1865 #endif 1866 1867 /* End of pcre_internal.h */ 1868
