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Revision 747 - (show annotations) (download)
Tue Nov 15 17:35:10 2011 UTC (2 years, 11 months ago) by ph10
File MIME type: text/plain
File size: 84140 byte(s)
Fixed several items that were being incorrectly rejected as "not fixed length"
in lookbehinds. 

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) 1997-2011 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 /* Private flags containing information about the compiled regex. They used to
586 live at the top end of the options word, but that got almost full, so now they
587 are in a 16-bit flags word. From release 8.00, PCRE_NOPARTIAL is unused, as
588 the restrictions on partial matching have been lifted. It remains for backwards
589 compatibility. */
590
591 #define PCRE_NOPARTIAL 0x0001 /* can't use partial with this regex */
592 #define PCRE_FIRSTSET 0x0002 /* first_byte is set */
593 #define PCRE_REQCHSET 0x0004 /* req_byte is set */
594 #define PCRE_STARTLINE 0x0008 /* start after \n for multiline */
595 #define PCRE_JCHANGED 0x0010 /* j option used in regex */
596 #define PCRE_HASCRORLF 0x0020 /* explicit \r or \n in pattern */
597 #define PCRE_HASTHEN 0x0040 /* pattern contains (*THEN) */
598
599 /* Flags for the "extra" block produced by pcre_study(). */
600
601 #define PCRE_STUDY_MAPPED 0x0001 /* a map of starting chars exists */
602 #define PCRE_STUDY_MINLEN 0x0002 /* a minimum length field exists */
603
604 /* Masks for identifying the public options that are permitted at compile
605 time, run time, or study time, respectively. */
606
607 #define PCRE_NEWLINE_BITS (PCRE_NEWLINE_CR|PCRE_NEWLINE_LF|PCRE_NEWLINE_ANY| \
608 PCRE_NEWLINE_ANYCRLF)
609
610 #define PUBLIC_COMPILE_OPTIONS \
611 (PCRE_CASELESS|PCRE_EXTENDED|PCRE_ANCHORED|PCRE_MULTILINE| \
612 PCRE_DOTALL|PCRE_DOLLAR_ENDONLY|PCRE_EXTRA|PCRE_UNGREEDY|PCRE_UTF8| \
613 PCRE_NO_AUTO_CAPTURE|PCRE_NO_UTF8_CHECK|PCRE_AUTO_CALLOUT|PCRE_FIRSTLINE| \
614 PCRE_DUPNAMES|PCRE_NEWLINE_BITS|PCRE_BSR_ANYCRLF|PCRE_BSR_UNICODE| \
615 PCRE_JAVASCRIPT_COMPAT|PCRE_UCP|PCRE_NO_START_OPTIMIZE)
616
617 #define PUBLIC_EXEC_OPTIONS \
618 (PCRE_ANCHORED|PCRE_NOTBOL|PCRE_NOTEOL|PCRE_NOTEMPTY|PCRE_NOTEMPTY_ATSTART| \
619 PCRE_NO_UTF8_CHECK|PCRE_PARTIAL_HARD|PCRE_PARTIAL_SOFT|PCRE_NEWLINE_BITS| \
620 PCRE_BSR_ANYCRLF|PCRE_BSR_UNICODE|PCRE_NO_START_OPTIMIZE)
621
622 #define PUBLIC_DFA_EXEC_OPTIONS \
623 (PCRE_ANCHORED|PCRE_NOTBOL|PCRE_NOTEOL|PCRE_NOTEMPTY|PCRE_NOTEMPTY_ATSTART| \
624 PCRE_NO_UTF8_CHECK|PCRE_PARTIAL_HARD|PCRE_PARTIAL_SOFT|PCRE_DFA_SHORTEST| \
625 PCRE_DFA_RESTART|PCRE_NEWLINE_BITS|PCRE_BSR_ANYCRLF|PCRE_BSR_UNICODE| \
626 PCRE_NO_START_OPTIMIZE)
627
628 #define PUBLIC_STUDY_OPTIONS \
629 PCRE_STUDY_JIT_COMPILE
630
631 /* Magic number to provide a small check against being handed junk. Also used
632 to detect whether a pattern was compiled on a host of different endianness. */
633
634 #define MAGIC_NUMBER 0x50435245UL /* 'PCRE' */
635
636 /* Negative values for the firstchar and reqchar variables */
637
638 #define REQ_UNSET (-2)
639 #define REQ_NONE (-1)
640
641 /* The maximum remaining length of subject we are prepared to search for a
642 req_byte match. */
643
644 #define REQ_BYTE_MAX 1000
645
646 /* Flags added to firstbyte or reqbyte; a "non-literal" item is either a
647 variable-length repeat, or a anything other than literal characters. */
648
649 #define REQ_CASELESS 0x0100 /* indicates caselessness */
650 #define REQ_VARY 0x0200 /* reqbyte followed non-literal item */
651
652 /* Miscellaneous definitions. The #ifndef is to pacify compiler warnings in
653 environments where these macros are defined elsewhere. Unfortunately, there
654 is no way to do the same for the typedef. */
655
656 typedef int BOOL;
657
658 #ifndef FALSE
659 #define FALSE 0
660 #define TRUE 1
661 #endif
662
663 /* If PCRE is to support UTF-8 on EBCDIC platforms, we cannot use normal
664 character constants like '*' because the compiler would emit their EBCDIC code,
665 which is different from their ASCII/UTF-8 code. Instead we define macros for
666 the characters so that they always use the ASCII/UTF-8 code when UTF-8 support
667 is enabled. When UTF-8 support is not enabled, the definitions use character
668 literals. Both character and string versions of each character are needed, and
669 there are some longer strings as well.
670
671 This means that, on EBCDIC platforms, the PCRE library can handle either
672 EBCDIC, or UTF-8, but not both. To support both in the same compiled library
673 would need different lookups depending on whether PCRE_UTF8 was set or not.
674 This would make it impossible to use characters in switch/case statements,
675 which would reduce performance. For a theoretical use (which nobody has asked
676 for) in a minority area (EBCDIC platforms), this is not sensible. Any
677 application that did need both could compile two versions of the library, using
678 macros to give the functions distinct names. */
679
680 #ifndef SUPPORT_UTF8
681
682 /* UTF-8 support is not enabled; use the platform-dependent character literals
683 so that PCRE works on both ASCII and EBCDIC platforms, in non-UTF-mode only. */
684
685 #define CHAR_HT '\t'
686 #define CHAR_VT '\v'
687 #define CHAR_FF '\f'
688 #define CHAR_CR '\r'
689 #define CHAR_NL '\n'
690 #define CHAR_BS '\b'
691 #define CHAR_BEL '\a'
692 #ifdef EBCDIC
693 #define CHAR_ESC '\047'
694 #define CHAR_DEL '\007'
695 #else
696 #define CHAR_ESC '\033'
697 #define CHAR_DEL '\177'
698 #endif
699
700 #define CHAR_SPACE ' '
701 #define CHAR_EXCLAMATION_MARK '!'
702 #define CHAR_QUOTATION_MARK '"'
703 #define CHAR_NUMBER_SIGN '#'
704 #define CHAR_DOLLAR_SIGN '$'
705 #define CHAR_PERCENT_SIGN '%'
706 #define CHAR_AMPERSAND '&'
707 #define CHAR_APOSTROPHE '\''
708 #define CHAR_LEFT_PARENTHESIS '('
709 #define CHAR_RIGHT_PARENTHESIS ')'
710 #define CHAR_ASTERISK '*'
711 #define CHAR_PLUS '+'
712 #define CHAR_COMMA ','
713 #define CHAR_MINUS '-'
714 #define CHAR_DOT '.'
715 #define CHAR_SLASH '/'
716 #define CHAR_0 '0'
717 #define CHAR_1 '1'
718 #define CHAR_2 '2'
719 #define CHAR_3 '3'
720 #define CHAR_4 '4'
721 #define CHAR_5 '5'
722 #define CHAR_6 '6'
723 #define CHAR_7 '7'
724 #define CHAR_8 '8'
725 #define CHAR_9 '9'
726 #define CHAR_COLON ':'
727 #define CHAR_SEMICOLON ';'
728 #define CHAR_LESS_THAN_SIGN '<'
729 #define CHAR_EQUALS_SIGN '='
730 #define CHAR_GREATER_THAN_SIGN '>'
731 #define CHAR_QUESTION_MARK '?'
732 #define CHAR_COMMERCIAL_AT '@'
733 #define CHAR_A 'A'
734 #define CHAR_B 'B'
735 #define CHAR_C 'C'
736 #define CHAR_D 'D'
737 #define CHAR_E 'E'
738 #define CHAR_F 'F'
739 #define CHAR_G 'G'
740 #define CHAR_H 'H'
741 #define CHAR_I 'I'
742 #define CHAR_J 'J'
743 #define CHAR_K 'K'
744 #define CHAR_L 'L'
745 #define CHAR_M 'M'
746 #define CHAR_N 'N'
747 #define CHAR_O 'O'
748 #define CHAR_P 'P'
749 #define CHAR_Q 'Q'
750 #define CHAR_R 'R'
751 #define CHAR_S 'S'
752 #define CHAR_T 'T'
753 #define CHAR_U 'U'
754 #define CHAR_V 'V'
755 #define CHAR_W 'W'
756 #define CHAR_X 'X'
757 #define CHAR_Y 'Y'
758 #define CHAR_Z 'Z'
759 #define CHAR_LEFT_SQUARE_BRACKET '['
760 #define CHAR_BACKSLASH '\\'
761 #define CHAR_RIGHT_SQUARE_BRACKET ']'
762 #define CHAR_CIRCUMFLEX_ACCENT '^'
763 #define CHAR_UNDERSCORE '_'
764 #define CHAR_GRAVE_ACCENT '`'
765 #define CHAR_a 'a'
766 #define CHAR_b 'b'
767 #define CHAR_c 'c'
768 #define CHAR_d 'd'
769 #define CHAR_e 'e'
770 #define CHAR_f 'f'
771 #define CHAR_g 'g'
772 #define CHAR_h 'h'
773 #define CHAR_i 'i'
774 #define CHAR_j 'j'
775 #define CHAR_k 'k'
776 #define CHAR_l 'l'
777 #define CHAR_m 'm'
778 #define CHAR_n 'n'
779 #define CHAR_o 'o'
780 #define CHAR_p 'p'
781 #define CHAR_q 'q'
782 #define CHAR_r 'r'
783 #define CHAR_s 's'
784 #define CHAR_t 't'
785 #define CHAR_u 'u'
786 #define CHAR_v 'v'
787 #define CHAR_w 'w'
788 #define CHAR_x 'x'
789 #define CHAR_y 'y'
790 #define CHAR_z 'z'
791 #define CHAR_LEFT_CURLY_BRACKET '{'
792 #define CHAR_VERTICAL_LINE '|'
793 #define CHAR_RIGHT_CURLY_BRACKET '}'
794 #define CHAR_TILDE '~'
795
796 #define STR_HT "\t"
797 #define STR_VT "\v"
798 #define STR_FF "\f"
799 #define STR_CR "\r"
800 #define STR_NL "\n"
801 #define STR_BS "\b"
802 #define STR_BEL "\a"
803 #ifdef EBCDIC
804 #define STR_ESC "\047"
805 #define STR_DEL "\007"
806 #else
807 #define STR_ESC "\033"
808 #define STR_DEL "\177"
809 #endif
810
811 #define STR_SPACE " "
812 #define STR_EXCLAMATION_MARK "!"
813 #define STR_QUOTATION_MARK "\""
814 #define STR_NUMBER_SIGN "#"
815 #define STR_DOLLAR_SIGN "$"
816 #define STR_PERCENT_SIGN "%"
817 #define STR_AMPERSAND "&"
818 #define STR_APOSTROPHE "'"
819 #define STR_LEFT_PARENTHESIS "("
820 #define STR_RIGHT_PARENTHESIS ")"
821 #define STR_ASTERISK "*"
822 #define STR_PLUS "+"
823 #define STR_COMMA ","
824 #define STR_MINUS "-"
825 #define STR_DOT "."
826 #define STR_SLASH "/"
827 #define STR_0 "0"
828 #define STR_1 "1"
829 #define STR_2 "2"
830 #define STR_3 "3"
831 #define STR_4 "4"
832 #define STR_5 "5"
833 #define STR_6 "6"
834 #define STR_7 "7"
835 #define STR_8 "8"
836 #define STR_9 "9"
837 #define STR_COLON ":"
838 #define STR_SEMICOLON ";"
839 #define STR_LESS_THAN_SIGN "<"
840 #define STR_EQUALS_SIGN "="
841 #define STR_GREATER_THAN_SIGN ">"
842 #define STR_QUESTION_MARK "?"
843 #define STR_COMMERCIAL_AT "@"
844 #define STR_A "A"
845 #define STR_B "B"
846 #define STR_C "C"
847 #define STR_D "D"
848 #define STR_E "E"
849 #define STR_F "F"
850 #define STR_G "G"
851 #define STR_H "H"
852 #define STR_I "I"
853 #define STR_J "J"
854 #define STR_K "K"
855 #define STR_L "L"
856 #define STR_M "M"
857 #define STR_N "N"
858 #define STR_O "O"
859 #define STR_P "P"
860 #define STR_Q "Q"
861 #define STR_R "R"
862 #define STR_S "S"
863 #define STR_T "T"
864 #define STR_U "U"
865 #define STR_V "V"
866 #define STR_W "W"
867 #define STR_X "X"
868 #define STR_Y "Y"
869 #define STR_Z "Z"
870 #define STR_LEFT_SQUARE_BRACKET "["
871 #define STR_BACKSLASH "\\"
872 #define STR_RIGHT_SQUARE_BRACKET "]"
873 #define STR_CIRCUMFLEX_ACCENT "^"
874 #define STR_UNDERSCORE "_"
875 #define STR_GRAVE_ACCENT "`"
876 #define STR_a "a"
877 #define STR_b "b"
878 #define STR_c "c"
879 #define STR_d "d"
880 #define STR_e "e"
881 #define STR_f "f"
882 #define STR_g "g"
883 #define STR_h "h"
884 #define STR_i "i"
885 #define STR_j "j"
886 #define STR_k "k"
887 #define STR_l "l"
888 #define STR_m "m"
889 #define STR_n "n"
890 #define STR_o "o"
891 #define STR_p "p"
892 #define STR_q "q"
893 #define STR_r "r"
894 #define STR_s "s"
895 #define STR_t "t"
896 #define STR_u "u"
897 #define STR_v "v"
898 #define STR_w "w"
899 #define STR_x "x"
900 #define STR_y "y"
901 #define STR_z "z"
902 #define STR_LEFT_CURLY_BRACKET "{"
903 #define STR_VERTICAL_LINE "|"
904 #define STR_RIGHT_CURLY_BRACKET "}"
905 #define STR_TILDE "~"
906
907 #define STRING_ACCEPT0 "ACCEPT\0"
908 #define STRING_COMMIT0 "COMMIT\0"
909 #define STRING_F0 "F\0"
910 #define STRING_FAIL0 "FAIL\0"
911 #define STRING_MARK0 "MARK\0"
912 #define STRING_PRUNE0 "PRUNE\0"
913 #define STRING_SKIP0 "SKIP\0"
914 #define STRING_THEN "THEN"
915
916 #define STRING_alpha0 "alpha\0"
917 #define STRING_lower0 "lower\0"
918 #define STRING_upper0 "upper\0"
919 #define STRING_alnum0 "alnum\0"
920 #define STRING_ascii0 "ascii\0"
921 #define STRING_blank0 "blank\0"
922 #define STRING_cntrl0 "cntrl\0"
923 #define STRING_digit0 "digit\0"
924 #define STRING_graph0 "graph\0"
925 #define STRING_print0 "print\0"
926 #define STRING_punct0 "punct\0"
927 #define STRING_space0 "space\0"
928 #define STRING_word0 "word\0"
929 #define STRING_xdigit "xdigit"
930
931 #define STRING_DEFINE "DEFINE"
932
933 #define STRING_CR_RIGHTPAR "CR)"
934 #define STRING_LF_RIGHTPAR "LF)"
935 #define STRING_CRLF_RIGHTPAR "CRLF)"
936 #define STRING_ANY_RIGHTPAR "ANY)"
937 #define STRING_ANYCRLF_RIGHTPAR "ANYCRLF)"
938 #define STRING_BSR_ANYCRLF_RIGHTPAR "BSR_ANYCRLF)"
939 #define STRING_BSR_UNICODE_RIGHTPAR "BSR_UNICODE)"
940 #define STRING_UTF8_RIGHTPAR "UTF8)"
941 #define STRING_UCP_RIGHTPAR "UCP)"
942 #define STRING_NO_START_OPT_RIGHTPAR "NO_START_OPT)"
943
944 #else /* SUPPORT_UTF8 */
945
946 /* UTF-8 support is enabled; always use UTF-8 (=ASCII) character codes. This
947 works in both modes non-EBCDIC platforms, and on EBCDIC platforms in UTF-8 mode
948 only. */
949
950 #define CHAR_HT '\011'
951 #define CHAR_VT '\013'
952 #define CHAR_FF '\014'
953 #define CHAR_CR '\015'
954 #define CHAR_NL '\012'
955 #define CHAR_BS '\010'
956 #define CHAR_BEL '\007'
957 #define CHAR_ESC '\033'
958 #define CHAR_DEL '\177'
959
960 #define CHAR_SPACE '\040'
961 #define CHAR_EXCLAMATION_MARK '\041'
962 #define CHAR_QUOTATION_MARK '\042'
963 #define CHAR_NUMBER_SIGN '\043'
964 #define CHAR_DOLLAR_SIGN '\044'
965 #define CHAR_PERCENT_SIGN '\045'
966 #define CHAR_AMPERSAND '\046'
967 #define CHAR_APOSTROPHE '\047'
968 #define CHAR_LEFT_PARENTHESIS '\050'
969 #define CHAR_RIGHT_PARENTHESIS '\051'
970 #define CHAR_ASTERISK '\052'
971 #define CHAR_PLUS '\053'
972 #define CHAR_COMMA '\054'
973 #define CHAR_MINUS '\055'
974 #define CHAR_DOT '\056'
975 #define CHAR_SLASH '\057'
976 #define CHAR_0 '\060'
977 #define CHAR_1 '\061'
978 #define CHAR_2 '\062'
979 #define CHAR_3 '\063'
980 #define CHAR_4 '\064'
981 #define CHAR_5 '\065'
982 #define CHAR_6 '\066'
983 #define CHAR_7 '\067'
984 #define CHAR_8 '\070'
985 #define CHAR_9 '\071'
986 #define CHAR_COLON '\072'
987 #define CHAR_SEMICOLON '\073'
988 #define CHAR_LESS_THAN_SIGN '\074'
989 #define CHAR_EQUALS_SIGN '\075'
990 #define CHAR_GREATER_THAN_SIGN '\076'
991 #define CHAR_QUESTION_MARK '\077'
992 #define CHAR_COMMERCIAL_AT '\100'
993 #define CHAR_A '\101'
994 #define CHAR_B '\102'
995 #define CHAR_C '\103'
996 #define CHAR_D '\104'
997 #define CHAR_E '\105'
998 #define CHAR_F '\106'
999 #define CHAR_G '\107'
1000 #define CHAR_H '\110'
1001 #define CHAR_I '\111'
1002 #define CHAR_J '\112'
1003 #define CHAR_K '\113'
1004 #define CHAR_L '\114'
1005 #define CHAR_M '\115'
1006 #define CHAR_N '\116'
1007 #define CHAR_O '\117'
1008 #define CHAR_P '\120'
1009 #define CHAR_Q '\121'
1010 #define CHAR_R '\122'
1011 #define CHAR_S '\123'
1012 #define CHAR_T '\124'
1013 #define CHAR_U '\125'
1014 #define CHAR_V '\126'
1015 #define CHAR_W '\127'
1016 #define CHAR_X '\130'
1017 #define CHAR_Y '\131'
1018 #define CHAR_Z '\132'
1019 #define CHAR_LEFT_SQUARE_BRACKET '\133'
1020 #define CHAR_BACKSLASH '\134'
1021 #define CHAR_RIGHT_SQUARE_BRACKET '\135'
1022 #define CHAR_CIRCUMFLEX_ACCENT '\136'
1023 #define CHAR_UNDERSCORE '\137'
1024 #define CHAR_GRAVE_ACCENT '\140'
1025 #define CHAR_a '\141'
1026 #define CHAR_b '\142'
1027 #define CHAR_c '\143'
1028 #define CHAR_d '\144'
1029 #define CHAR_e '\145'
1030 #define CHAR_f '\146'
1031 #define CHAR_g '\147'
1032 #define CHAR_h '\150'
1033 #define CHAR_i '\151'
1034 #define CHAR_j '\152'
1035 #define CHAR_k '\153'
1036 #define CHAR_l '\154'
1037 #define CHAR_m '\155'
1038 #define CHAR_n '\156'
1039 #define CHAR_o '\157'
1040 #define CHAR_p '\160'
1041 #define CHAR_q '\161'
1042 #define CHAR_r '\162'
1043 #define CHAR_s '\163'
1044 #define CHAR_t '\164'
1045 #define CHAR_u '\165'
1046 #define CHAR_v '\166'
1047 #define CHAR_w '\167'
1048 #define CHAR_x '\170'
1049 #define CHAR_y '\171'
1050 #define CHAR_z '\172'
1051 #define CHAR_LEFT_CURLY_BRACKET '\173'
1052 #define CHAR_VERTICAL_LINE '\174'
1053 #define CHAR_RIGHT_CURLY_BRACKET '\175'
1054 #define CHAR_TILDE '\176'
1055
1056 #define STR_HT "\011"
1057 #define STR_VT "\013"
1058 #define STR_FF "\014"
1059 #define STR_CR "\015"
1060 #define STR_NL "\012"
1061 #define STR_BS "\010"
1062 #define STR_BEL "\007"
1063 #define STR_ESC "\033"
1064 #define STR_DEL "\177"
1065
1066 #define STR_SPACE "\040"
1067 #define STR_EXCLAMATION_MARK "\041"
1068 #define STR_QUOTATION_MARK "\042"
1069 #define STR_NUMBER_SIGN "\043"
1070 #define STR_DOLLAR_SIGN "\044"
1071 #define STR_PERCENT_SIGN "\045"
1072 #define STR_AMPERSAND "\046"
1073 #define STR_APOSTROPHE "\047"
1074 #define STR_LEFT_PARENTHESIS "\050"
1075 #define STR_RIGHT_PARENTHESIS "\051"
1076 #define STR_ASTERISK "\052"
1077 #define STR_PLUS "\053"
1078 #define STR_COMMA "\054"
1079 #define STR_MINUS "\055"
1080 #define STR_DOT "\056"
1081 #define STR_SLASH "\057"
1082 #define STR_0 "\060"
1083 #define STR_1 "\061"
1084 #define STR_2 "\062"
1085 #define STR_3 "\063"
1086 #define STR_4 "\064"
1087 #define STR_5 "\065"
1088 #define STR_6 "\066"
1089 #define STR_7 "\067"
1090 #define STR_8 "\070"
1091 #define STR_9 "\071"
1092 #define STR_COLON "\072"
1093 #define STR_SEMICOLON "\073"
1094 #define STR_LESS_THAN_SIGN "\074"
1095 #define STR_EQUALS_SIGN "\075"
1096 #define STR_GREATER_THAN_SIGN "\076"
1097 #define STR_QUESTION_MARK "\077"
1098 #define STR_COMMERCIAL_AT "\100"
1099 #define STR_A "\101"
1100 #define STR_B "\102"
1101 #define STR_C "\103"
1102 #define STR_D "\104"
1103 #define STR_E "\105"
1104 #define STR_F "\106"
1105 #define STR_G "\107"
1106 #define STR_H "\110"
1107 #define STR_I "\111"
1108 #define STR_J "\112"
1109 #define STR_K "\113"
1110 #define STR_L "\114"
1111 #define STR_M "\115"
1112 #define STR_N "\116"
1113 #define STR_O "\117"
1114 #define STR_P "\120"
1115 #define STR_Q "\121"
1116 #define STR_R "\122"
1117 #define STR_S "\123"
1118 #define STR_T "\124"
1119 #define STR_U "\125"
1120 #define STR_V "\126"
1121 #define STR_W "\127"
1122 #define STR_X "\130"
1123 #define STR_Y "\131"
1124 #define STR_Z "\132"
1125 #define STR_LEFT_SQUARE_BRACKET "\133"
1126 #define STR_BACKSLASH "\134"
1127 #define STR_RIGHT_SQUARE_BRACKET "\135"
1128 #define STR_CIRCUMFLEX_ACCENT "\136"
1129 #define STR_UNDERSCORE "\137"
1130 #define STR_GRAVE_ACCENT "\140"
1131 #define STR_a "\141"
1132 #define STR_b "\142"
1133 #define STR_c "\143"
1134 #define STR_d "\144"
1135 #define STR_e "\145"
1136 #define STR_f "\146"
1137 #define STR_g "\147"
1138 #define STR_h "\150"
1139 #define STR_i "\151"
1140 #define STR_j "\152"
1141 #define STR_k "\153"
1142 #define STR_l "\154"
1143 #define STR_m "\155"
1144 #define STR_n "\156"
1145 #define STR_o "\157"
1146 #define STR_p "\160"
1147 #define STR_q "\161"
1148 #define STR_r "\162"
1149 #define STR_s "\163"
1150 #define STR_t "\164"
1151 #define STR_u "\165"
1152 #define STR_v "\166"
1153 #define STR_w "\167"
1154 #define STR_x "\170"
1155 #define STR_y "\171"
1156 #define STR_z "\172"
1157 #define STR_LEFT_CURLY_BRACKET "\173"
1158 #define STR_VERTICAL_LINE "\174"
1159 #define STR_RIGHT_CURLY_BRACKET "\175"
1160 #define STR_TILDE "\176"
1161
1162 #define STRING_ACCEPT0 STR_A STR_C STR_C STR_E STR_P STR_T "\0"
1163 #define STRING_COMMIT0 STR_C STR_O STR_M STR_M STR_I STR_T "\0"
1164 #define STRING_F0 STR_F "\0"
1165 #define STRING_FAIL0 STR_F STR_A STR_I STR_L "\0"
1166 #define STRING_MARK0 STR_M STR_A STR_R STR_K "\0"
1167 #define STRING_PRUNE0 STR_P STR_R STR_U STR_N STR_E "\0"
1168 #define STRING_SKIP0 STR_S STR_K STR_I STR_P "\0"
1169 #define STRING_THEN STR_T STR_H STR_E STR_N
1170
1171 #define STRING_alpha0 STR_a STR_l STR_p STR_h STR_a "\0"
1172 #define STRING_lower0 STR_l STR_o STR_w STR_e STR_r "\0"
1173 #define STRING_upper0 STR_u STR_p STR_p STR_e STR_r "\0"
1174 #define STRING_alnum0 STR_a STR_l STR_n STR_u STR_m "\0"
1175 #define STRING_ascii0 STR_a STR_s STR_c STR_i STR_i "\0"
1176 #define STRING_blank0 STR_b STR_l STR_a STR_n STR_k "\0"
1177 #define STRING_cntrl0 STR_c STR_n STR_t STR_r STR_l "\0"
1178 #define STRING_digit0 STR_d STR_i STR_g STR_i STR_t "\0"
1179 #define STRING_graph0 STR_g STR_r STR_a STR_p STR_h "\0"
1180 #define STRING_print0 STR_p STR_r STR_i STR_n STR_t "\0"
1181 #define STRING_punct0 STR_p STR_u STR_n STR_c STR_t "\0"
1182 #define STRING_space0 STR_s STR_p STR_a STR_c STR_e "\0"
1183 #define STRING_word0 STR_w STR_o STR_r STR_d "\0"
1184 #define STRING_xdigit STR_x STR_d STR_i STR_g STR_i STR_t
1185
1186 #define STRING_DEFINE STR_D STR_E STR_F STR_I STR_N STR_E
1187
1188 #define STRING_CR_RIGHTPAR STR_C STR_R STR_RIGHT_PARENTHESIS
1189 #define STRING_LF_RIGHTPAR STR_L STR_F STR_RIGHT_PARENTHESIS
1190 #define STRING_CRLF_RIGHTPAR STR_C STR_R STR_L STR_F STR_RIGHT_PARENTHESIS
1191 #define STRING_ANY_RIGHTPAR STR_A STR_N STR_Y STR_RIGHT_PARENTHESIS
1192 #define STRING_ANYCRLF_RIGHTPAR STR_A STR_N STR_Y STR_C STR_R STR_L STR_F STR_RIGHT_PARENTHESIS
1193 #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
1194 #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
1195 #define STRING_UTF8_RIGHTPAR STR_U STR_T STR_F STR_8 STR_RIGHT_PARENTHESIS
1196 #define STRING_UCP_RIGHTPAR STR_U STR_C STR_P STR_RIGHT_PARENTHESIS
1197 #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
1198
1199 #endif /* SUPPORT_UTF8 */
1200
1201 /* Escape items that are just an encoding of a particular data value. */
1202
1203 #ifndef ESC_e
1204 #define ESC_e CHAR_ESC
1205 #endif
1206
1207 #ifndef ESC_f
1208 #define ESC_f CHAR_FF
1209 #endif
1210
1211 #ifndef ESC_n
1212 #define ESC_n CHAR_NL
1213 #endif
1214
1215 #ifndef ESC_r
1216 #define ESC_r CHAR_CR
1217 #endif
1218
1219 /* We can't officially use ESC_t because it is a POSIX reserved identifier
1220 (presumably because of all the others like size_t). */
1221
1222 #ifndef ESC_tee
1223 #define ESC_tee CHAR_HT
1224 #endif
1225
1226 /* Codes for different types of Unicode property */
1227
1228 #define PT_ANY 0 /* Any property - matches all chars */
1229 #define PT_LAMP 1 /* L& - the union of Lu, Ll, Lt */
1230 #define PT_GC 2 /* Specified general characteristic (e.g. L) */
1231 #define PT_PC 3 /* Specified particular characteristic (e.g. Lu) */
1232 #define PT_SC 4 /* Script (e.g. Han) */
1233 #define PT_ALNUM 5 /* Alphanumeric - the union of L and N */
1234 #define PT_SPACE 6 /* Perl space - Z plus 9,10,12,13 */
1235 #define PT_PXSPACE 7 /* POSIX space - Z plus 9,10,11,12,13 */
1236 #define PT_WORD 8 /* Word - L plus N plus underscore */
1237
1238 /* Flag bits and data types for the extended class (OP_XCLASS) for classes that
1239 contain UTF-8 characters with values greater than 255. */
1240
1241 #define XCL_NOT 0x01 /* Flag: this is a negative class */
1242 #define XCL_MAP 0x02 /* Flag: a 32-byte map is present */
1243
1244 #define XCL_END 0 /* Marks end of individual items */
1245 #define XCL_SINGLE 1 /* Single item (one multibyte char) follows */
1246 #define XCL_RANGE 2 /* A range (two multibyte chars) follows */
1247 #define XCL_PROP 3 /* Unicode property (2-byte property code follows) */
1248 #define XCL_NOTPROP 4 /* Unicode inverted property (ditto) */
1249
1250 /* These are escaped items that aren't just an encoding of a particular data
1251 value such as \n. They must have non-zero values, as check_escape() returns
1252 their negation. Also, they must appear in the same order as in the opcode
1253 definitions below, up to ESC_z. There's a dummy for OP_ALLANY because it
1254 corresponds to "." in DOTALL mode rather than an escape sequence. It is also
1255 used for [^] in JavaScript compatibility mode. In non-DOTALL mode, "." behaves
1256 like \N.
1257
1258 The special values ESC_DU, ESC_du, etc. are used instead of ESC_D, ESC_d, etc.
1259 when PCRE_UCP is set, when replacement of \d etc by \p sequences is required.
1260 They must be contiguous, and remain in order so that the replacements can be
1261 looked up from a table.
1262
1263 The final escape must be ESC_REF as subsequent values are used for
1264 backreferences (\1, \2, \3, etc). There are two tests in the code for an escape
1265 greater than ESC_b and less than ESC_Z to detect the types that may be
1266 repeated. These are the types that consume characters. If any new escapes are
1267 put in between that don't consume a character, that code will have to change.
1268 */
1269
1270 enum { ESC_A = 1, ESC_G, ESC_K, ESC_B, ESC_b, ESC_D, ESC_d, ESC_S, ESC_s,
1271 ESC_W, ESC_w, ESC_N, ESC_dum, ESC_C, ESC_P, ESC_p, ESC_R, ESC_H,
1272 ESC_h, ESC_V, ESC_v, ESC_X, ESC_Z, ESC_z,
1273 ESC_E, ESC_Q, ESC_g, ESC_k,
1274 ESC_DU, ESC_du, ESC_SU, ESC_su, ESC_WU, ESC_wu,
1275 ESC_REF };
1276
1277 /* Opcode table: Starting from 1 (i.e. after OP_END), the values up to
1278 OP_EOD must correspond in order to the list of escapes immediately above.
1279
1280 *** NOTE NOTE NOTE *** Whenever this list is updated, the two macro definitions
1281 that follow must also be updated to match. There are also tables called
1282 "coptable" and "poptable" in pcre_dfa_exec.c that must be updated. */
1283
1284 enum {
1285 OP_END, /* 0 End of pattern */
1286
1287 /* Values corresponding to backslashed metacharacters */
1288
1289 OP_SOD, /* 1 Start of data: \A */
1290 OP_SOM, /* 2 Start of match (subject + offset): \G */
1291 OP_SET_SOM, /* 3 Set start of match (\K) */
1292 OP_NOT_WORD_BOUNDARY, /* 4 \B */
1293 OP_WORD_BOUNDARY, /* 5 \b */
1294 OP_NOT_DIGIT, /* 6 \D */
1295 OP_DIGIT, /* 7 \d */
1296 OP_NOT_WHITESPACE, /* 8 \S */
1297 OP_WHITESPACE, /* 9 \s */
1298 OP_NOT_WORDCHAR, /* 10 \W */
1299 OP_WORDCHAR, /* 11 \w */
1300
1301 OP_ANY, /* 12 Match any character except newline */
1302 OP_ALLANY, /* 13 Match any character */
1303 OP_ANYBYTE, /* 14 Match any byte (\C); different to OP_ANY for UTF-8 */
1304 OP_NOTPROP, /* 15 \P (not Unicode property) */
1305 OP_PROP, /* 16 \p (Unicode property) */
1306 OP_ANYNL, /* 17 \R (any newline sequence) */
1307 OP_NOT_HSPACE, /* 18 \H (not horizontal whitespace) */
1308 OP_HSPACE, /* 19 \h (horizontal whitespace) */
1309 OP_NOT_VSPACE, /* 20 \V (not vertical whitespace) */
1310 OP_VSPACE, /* 21 \v (vertical whitespace) */
1311 OP_EXTUNI, /* 22 \X (extended Unicode sequence */
1312 OP_EODN, /* 23 End of data or \n at end of data: \Z. */
1313 OP_EOD, /* 24 End of data: \z */
1314
1315 OP_CIRC, /* 25 Start of line - not multiline */
1316 OP_CIRCM, /* 26 Start of line - multiline */
1317 OP_DOLL, /* 27 End of line - not multiline */
1318 OP_DOLLM, /* 28 End of line - multiline */
1319 OP_CHAR, /* 29 Match one character, casefully */
1320 OP_CHARI, /* 30 Match one character, caselessly */
1321 OP_NOT, /* 31 Match one character, not the given one, casefully */
1322 OP_NOTI, /* 32 Match one character, not the given one, caselessly */
1323
1324 /* The following sets of 13 opcodes must always be kept in step because
1325 the offset from the first one is used to generate the others. */
1326
1327 /**** Single characters, caseful, must precede the caseless ones ****/
1328
1329 OP_STAR, /* 33 The maximizing and minimizing versions of */
1330 OP_MINSTAR, /* 34 these six opcodes must come in pairs, with */
1331 OP_PLUS, /* 35 the minimizing one second. */
1332 OP_MINPLUS, /* 36 */
1333 OP_QUERY, /* 37 */
1334 OP_MINQUERY, /* 38 */
1335
1336 OP_UPTO, /* 39 From 0 to n matches of one character, caseful*/
1337 OP_MINUPTO, /* 40 */
1338 OP_EXACT, /* 41 Exactly n matches */
1339
1340 OP_POSSTAR, /* 42 Possessified star, caseful */
1341 OP_POSPLUS, /* 43 Possessified plus, caseful */
1342 OP_POSQUERY, /* 44 Posesssified query, caseful */
1343 OP_POSUPTO, /* 45 Possessified upto, caseful */
1344
1345 /**** Single characters, caseless, must follow the caseful ones */
1346
1347 OP_STARI, /* 46 */
1348 OP_MINSTARI, /* 47 */
1349 OP_PLUSI, /* 48 */
1350 OP_MINPLUSI, /* 49 */
1351 OP_QUERYI, /* 50 */
1352 OP_MINQUERYI, /* 51 */
1353
1354 OP_UPTOI, /* 52 From 0 to n matches of one character, caseless */
1355 OP_MINUPTOI, /* 53 */
1356 OP_EXACTI, /* 54 */
1357
1358 OP_POSSTARI, /* 55 Possessified star, caseless */
1359 OP_POSPLUSI, /* 56 Possessified plus, caseless */
1360 OP_POSQUERYI, /* 57 Posesssified query, caseless */
1361 OP_POSUPTOI, /* 58 Possessified upto, caseless */
1362
1363 /**** The negated ones must follow the non-negated ones, and match them ****/
1364 /**** Negated single character, caseful; must precede the caseless ones ****/
1365
1366 OP_NOTSTAR, /* 59 The maximizing and minimizing versions of */
1367 OP_NOTMINSTAR, /* 60 these six opcodes must come in pairs, with */
1368 OP_NOTPLUS, /* 61 the minimizing one second. They must be in */
1369 OP_NOTMINPLUS, /* 62 exactly the same order as those above. */
1370 OP_NOTQUERY, /* 63 */
1371 OP_NOTMINQUERY, /* 64 */
1372
1373 OP_NOTUPTO, /* 65 From 0 to n matches, caseful */
1374 OP_NOTMINUPTO, /* 66 */
1375 OP_NOTEXACT, /* 67 Exactly n matches */
1376
1377 OP_NOTPOSSTAR, /* 68 Possessified versions, caseful */
1378 OP_NOTPOSPLUS, /* 69 */
1379 OP_NOTPOSQUERY, /* 70 */
1380 OP_NOTPOSUPTO, /* 71 */
1381
1382 /**** Negated single character, caseless; must follow the caseful ones ****/
1383
1384 OP_NOTSTARI, /* 72 */
1385 OP_NOTMINSTARI, /* 73 */
1386 OP_NOTPLUSI, /* 74 */
1387 OP_NOTMINPLUSI, /* 75 */
1388 OP_NOTQUERYI, /* 76 */
1389 OP_NOTMINQUERYI, /* 77 */
1390
1391 OP_NOTUPTOI, /* 78 From 0 to n matches, caseless */
1392 OP_NOTMINUPTOI, /* 79 */
1393 OP_NOTEXACTI, /* 80 Exactly n matches */
1394
1395 OP_NOTPOSSTARI, /* 81 Possessified versions, caseless */
1396 OP_NOTPOSPLUSI, /* 82 */
1397 OP_NOTPOSQUERYI, /* 83 */
1398 OP_NOTPOSUPTOI, /* 84 */
1399
1400 /**** Character types ****/
1401
1402 OP_TYPESTAR, /* 85 The maximizing and minimizing versions of */
1403 OP_TYPEMINSTAR, /* 86 these six opcodes must come in pairs, with */
1404 OP_TYPEPLUS, /* 87 the minimizing one second. These codes must */
1405 OP_TYPEMINPLUS, /* 88 be in exactly the same order as those above. */
1406 OP_TYPEQUERY, /* 89 */
1407 OP_TYPEMINQUERY, /* 90 */
1408
1409 OP_TYPEUPTO, /* 91 From 0 to n matches */
1410 OP_TYPEMINUPTO, /* 92 */
1411 OP_TYPEEXACT, /* 93 Exactly n matches */
1412
1413 OP_TYPEPOSSTAR, /* 94 Possessified versions */
1414 OP_TYPEPOSPLUS, /* 95 */
1415 OP_TYPEPOSQUERY, /* 96 */
1416 OP_TYPEPOSUPTO, /* 97 */
1417
1418 /* These are used for character classes and back references; only the
1419 first six are the same as the sets above. */
1420
1421 OP_CRSTAR, /* 98 The maximizing and minimizing versions of */
1422 OP_CRMINSTAR, /* 99 all these opcodes must come in pairs, with */
1423 OP_CRPLUS, /* 100 the minimizing one second. These codes must */
1424 OP_CRMINPLUS, /* 101 be in exactly the same order as those above. */
1425 OP_CRQUERY, /* 102 */
1426 OP_CRMINQUERY, /* 103 */
1427
1428 OP_CRRANGE, /* 104 These are different to the three sets above. */
1429 OP_CRMINRANGE, /* 105 */
1430
1431 /* End of quantifier opcodes */
1432
1433 OP_CLASS, /* 106 Match a character class, chars < 256 only */
1434 OP_NCLASS, /* 107 Same, but the bitmap was created from a negative
1435 class - the difference is relevant only when a
1436 UTF-8 character > 255 is encountered. */
1437 OP_XCLASS, /* 108 Extended class for handling UTF-8 chars within the
1438 class. This does both positive and negative. */
1439 OP_REF, /* 109 Match a back reference, casefully */
1440 OP_REFI, /* 110 Match a back reference, caselessly */
1441 OP_RECURSE, /* 111 Match a numbered subpattern (possibly recursive) */
1442 OP_CALLOUT, /* 112 Call out to external function if provided */
1443
1444 OP_ALT, /* 113 Start of alternation */
1445 OP_KET, /* 114 End of group that doesn't have an unbounded repeat */
1446 OP_KETRMAX, /* 115 These two must remain together and in this */
1447 OP_KETRMIN, /* 116 order. They are for groups the repeat for ever. */
1448 OP_KETRPOS, /* 117 Possessive unlimited repeat. */
1449
1450 /* The assertions must come before BRA, CBRA, ONCE, and COND, and the four
1451 asserts must remain in order. */
1452
1453 OP_REVERSE, /* 118 Move pointer back - used in lookbehind assertions */
1454 OP_ASSERT, /* 119 Positive lookahead */
1455 OP_ASSERT_NOT, /* 120 Negative lookahead */
1456 OP_ASSERTBACK, /* 121 Positive lookbehind */
1457 OP_ASSERTBACK_NOT, /* 122 Negative lookbehind */
1458
1459 /* ONCE, ONCE_NC, BRA, BRAPOS, CBRA, CBRAPOS, and COND must come immediately
1460 after the assertions, with ONCE first, as there's a test for >= ONCE for a
1461 subpattern that isn't an assertion. The POS versions must immediately follow
1462 the non-POS versions in each case. */
1463
1464 OP_ONCE, /* 123 Atomic group, contains captures */
1465 OP_ONCE_NC, /* 124 Atomic group containing no captures */
1466 OP_BRA, /* 125 Start of non-capturing bracket */
1467 OP_BRAPOS, /* 126 Ditto, with unlimited, possessive repeat */
1468 OP_CBRA, /* 127 Start of capturing bracket */
1469 OP_CBRAPOS, /* 128 Ditto, with unlimited, possessive repeat */
1470 OP_COND, /* 129 Conditional group */
1471
1472 /* These five must follow the previous five, in the same order. There's a
1473 check for >= SBRA to distinguish the two sets. */
1474
1475 OP_SBRA, /* 130 Start of non-capturing bracket, check empty */
1476 OP_SBRAPOS, /* 131 Ditto, with unlimited, possessive repeat */
1477 OP_SCBRA, /* 132 Start of capturing bracket, check empty */
1478 OP_SCBRAPOS, /* 133 Ditto, with unlimited, possessive repeat */
1479 OP_SCOND, /* 134 Conditional group, check empty */
1480
1481 /* The next two pairs must (respectively) be kept together. */
1482
1483 OP_CREF, /* 135 Used to hold a capture number as condition */
1484 OP_NCREF, /* 136 Same, but generated by a name reference*/
1485 OP_RREF, /* 137 Used to hold a recursion number as condition */
1486 OP_NRREF, /* 138 Same, but generated by a name reference*/
1487 OP_DEF, /* 139 The DEFINE condition */
1488
1489 OP_BRAZERO, /* 140 These two must remain together and in this */
1490 OP_BRAMINZERO, /* 141 order. */
1491 OP_BRAPOSZERO, /* 142 */
1492
1493 /* These are backtracking control verbs */
1494
1495 OP_MARK, /* 143 always has an argument */
1496 OP_PRUNE, /* 144 */
1497 OP_PRUNE_ARG, /* 145 same, but with argument */
1498 OP_SKIP, /* 146 */
1499 OP_SKIP_ARG, /* 147 same, but with argument */
1500 OP_THEN, /* 148 */
1501 OP_THEN_ARG, /* 149 same, but with argument */
1502 OP_COMMIT, /* 150 */
1503
1504 /* These are forced failure and success verbs */
1505
1506 OP_FAIL, /* 151 */
1507 OP_ACCEPT, /* 152 */
1508 OP_ASSERT_ACCEPT, /* 153 Used inside assertions */
1509 OP_CLOSE, /* 154 Used before OP_ACCEPT to close open captures */
1510
1511 /* This is used to skip a subpattern with a {0} quantifier */
1512
1513 OP_SKIPZERO, /* 155 */
1514
1515 /* This is not an opcode, but is used to check that tables indexed by opcode
1516 are the correct length, in order to catch updating errors - there have been
1517 some in the past. */
1518
1519 OP_TABLE_LENGTH
1520 };
1521
1522 /* *** NOTE NOTE NOTE *** Whenever the list above is updated, the two macro
1523 definitions that follow must also be updated to match. There are also tables
1524 called "coptable" and "poptable" in pcre_dfa_exec.c that must be updated. */
1525
1526
1527 /* This macro defines textual names for all the opcodes. These are used only
1528 for debugging, and some of them are only partial names. The macro is referenced
1529 only in pcre_printint.c, which fills out the full names in many cases (and in
1530 some cases doesn't actually use these names at all). */
1531
1532 #define OP_NAME_LIST \
1533 "End", "\\A", "\\G", "\\K", "\\B", "\\b", "\\D", "\\d", \
1534 "\\S", "\\s", "\\W", "\\w", "Any", "AllAny", "Anybyte", \
1535 "notprop", "prop", "\\R", "\\H", "\\h", "\\V", "\\v", \
1536 "extuni", "\\Z", "\\z", \
1537 "^", "^", "$", "$", "char", "chari", "not", "noti", \
1538 "*", "*?", "+", "+?", "?", "??", \
1539 "{", "{", "{", \
1540 "*+","++", "?+", "{", \
1541 "*", "*?", "+", "+?", "?", "??", \
1542 "{", "{", "{", \
1543 "*+","++", "?+", "{", \
1544 "*", "*?", "+", "+?", "?", "??", \
1545 "{", "{", "{", \
1546 "*+","++", "?+", "{", \
1547 "*", "*?", "+", "+?", "?", "??", \
1548 "{", "{", "{", \
1549 "*+","++", "?+", "{", \
1550 "*", "*?", "+", "+?", "?", "??", "{", "{", "{", \
1551 "*+","++", "?+", "{", \
1552 "*", "*?", "+", "+?", "?", "??", "{", "{", \
1553 "class", "nclass", "xclass", "Ref", "Refi", \
1554 "Recurse", "Callout", \
1555 "Alt", "Ket", "KetRmax", "KetRmin", "KetRpos", \
1556 "Reverse", "Assert", "Assert not", "AssertB", "AssertB not", \
1557 "Once", "Once_NC", \
1558 "Bra", "BraPos", "CBra", "CBraPos", \
1559 "Cond", \
1560 "SBra", "SBraPos", "SCBra", "SCBraPos", \
1561 "SCond", \
1562 "Cond ref", "Cond nref", "Cond rec", "Cond nrec", "Cond def", \
1563 "Brazero", "Braminzero", "Braposzero", \
1564 "*MARK", "*PRUNE", "*PRUNE", "*SKIP", "*SKIP", \
1565 "*THEN", "*THEN", "*COMMIT", "*FAIL", \
1566 "*ACCEPT", "*ASSERT_ACCEPT", \
1567 "Close", "Skip zero"
1568
1569
1570 /* This macro defines the length of fixed length operations in the compiled
1571 regex. The lengths are used when searching for specific things, and also in the
1572 debugging printing of a compiled regex. We use a macro so that it can be
1573 defined close to the definitions of the opcodes themselves.
1574
1575 As things have been extended, some of these are no longer fixed lenths, but are
1576 minima instead. For example, the length of a single-character repeat may vary
1577 in UTF-8 mode. The code that uses this table must know about such things. */
1578
1579 #define OP_LENGTHS \
1580 1, /* End */ \
1581 1, 1, 1, 1, 1, /* \A, \G, \K, \B, \b */ \
1582 1, 1, 1, 1, 1, 1, /* \D, \d, \S, \s, \W, \w */ \
1583 1, 1, 1, /* Any, AllAny, Anybyte */ \
1584 3, 3, /* \P, \p */ \
1585 1, 1, 1, 1, 1, /* \R, \H, \h, \V, \v */ \
1586 1, /* \X */ \
1587 1, 1, 1, 1, 1, 1, /* \Z, \z, ^, ^M, $, $M */ \
1588 2, /* Char - the minimum length */ \
1589 2, /* Chari - the minimum length */ \
1590 2, /* not */ \
1591 2, /* noti */ \
1592 /* Positive single-char repeats ** These are */ \
1593 2, 2, 2, 2, 2, 2, /* *, *?, +, +?, ?, ?? ** minima in */ \
1594 4, 4, 4, /* upto, minupto, exact ** mode */ \
1595 2, 2, 2, 4, /* *+, ++, ?+, upto+ */ \
1596 2, 2, 2, 2, 2, 2, /* *I, *?I, +I, +?I, ?I, ??I ** UTF-8 */ \
1597 4, 4, 4, /* upto I, minupto I, exact I */ \
1598 2, 2, 2, 4, /* *+I, ++I, ?+I, upto+I */ \
1599 /* Negative single-char repeats - only for chars < 256 */ \
1600 2, 2, 2, 2, 2, 2, /* NOT *, *?, +, +?, ?, ?? */ \
1601 4, 4, 4, /* NOT upto, minupto, exact */ \
1602 2, 2, 2, 4, /* Possessive NOT *, +, ?, upto */ \
1603 2, 2, 2, 2, 2, 2, /* NOT *I, *?I, +I, +?I, ?I, ??I */ \
1604 4, 4, 4, /* NOT upto I, minupto I, exact I */ \
1605 2, 2, 2, 4, /* Possessive NOT *I, +I, ?I, upto I */ \
1606 /* Positive type repeats */ \
1607 2, 2, 2, 2, 2, 2, /* Type *, *?, +, +?, ?, ?? */ \
1608 4, 4, 4, /* Type upto, minupto, exact */ \
1609 2, 2, 2, 4, /* Possessive *+, ++, ?+, upto+ */ \
1610 /* Character class & ref repeats */ \
1611 1, 1, 1, 1, 1, 1, /* *, *?, +, +?, ?, ?? */ \
1612 5, 5, /* CRRANGE, CRMINRANGE */ \
1613 33, /* CLASS */ \
1614 33, /* NCLASS */ \
1615 0, /* XCLASS - variable length */ \
1616 3, /* REF */ \
1617 3, /* REFI */ \
1618 1+LINK_SIZE, /* RECURSE */ \
1619 2+2*LINK_SIZE, /* CALLOUT */ \
1620 1+LINK_SIZE, /* Alt */ \
1621 1+LINK_SIZE, /* Ket */ \
1622 1+LINK_SIZE, /* KetRmax */ \
1623 1+LINK_SIZE, /* KetRmin */ \
1624 1+LINK_SIZE, /* KetRpos */ \
1625 1+LINK_SIZE, /* Reverse */ \
1626 1+LINK_SIZE, /* Assert */ \
1627 1+LINK_SIZE, /* Assert not */ \
1628 1+LINK_SIZE, /* Assert behind */ \
1629 1+LINK_SIZE, /* Assert behind not */ \
1630 1+LINK_SIZE, /* ONCE */ \
1631 1+LINK_SIZE, /* ONCE_NC */ \
1632 1+LINK_SIZE, /* BRA */ \
1633 1+LINK_SIZE, /* BRAPOS */ \
1634 3+LINK_SIZE, /* CBRA */ \
1635 3+LINK_SIZE, /* CBRAPOS */ \
1636 1+LINK_SIZE, /* COND */ \
1637 1+LINK_SIZE, /* SBRA */ \
1638 1+LINK_SIZE, /* SBRAPOS */ \
1639 3+LINK_SIZE, /* SCBRA */ \
1640 3+LINK_SIZE, /* SCBRAPOS */ \
1641 1+LINK_SIZE, /* SCOND */ \
1642 3, 3, /* CREF, NCREF */ \
1643 3, 3, /* RREF, NRREF */ \
1644 1, /* DEF */ \
1645 1, 1, 1, /* BRAZERO, BRAMINZERO, BRAPOSZERO */ \
1646 3, 1, 3, /* MARK, PRUNE, PRUNE_ARG */ \
1647 1, 3, /* SKIP, SKIP_ARG */ \
1648 1, 3, /* THEN, THEN_ARG */ \
1649 1, 1, 1, 1, /* COMMIT, FAIL, ACCEPT, ASSERT_ACCEPT */ \
1650 3, 1 /* CLOSE, SKIPZERO */
1651
1652 /* A magic value for OP_RREF and OP_NRREF to indicate the "any recursion"
1653 condition. */
1654
1655 #define RREF_ANY 0xffff
1656
1657 /* Compile time error code numbers. They are given names so that they can more
1658 easily be tracked. When a new number is added, the table called eint in
1659 pcreposix.c must be updated. */
1660
1661 enum { ERR0, ERR1, ERR2, ERR3, ERR4, ERR5, ERR6, ERR7, ERR8, ERR9,
1662 ERR10, ERR11, ERR12, ERR13, ERR14, ERR15, ERR16, ERR17, ERR18, ERR19,
1663 ERR20, ERR21, ERR22, ERR23, ERR24, ERR25, ERR26, ERR27, ERR28, ERR29,
1664 ERR30, ERR31, ERR32, ERR33, ERR34, ERR35, ERR36, ERR37, ERR38, ERR39,
1665 ERR40, ERR41, ERR42, ERR43, ERR44, ERR45, ERR46, ERR47, ERR48, ERR49,
1666 ERR50, ERR51, ERR52, ERR53, ERR54, ERR55, ERR56, ERR57, ERR58, ERR59,
1667 ERR60, ERR61, ERR62, ERR63, ERR64, ERR65, ERR66, ERR67, ERR68, ERR69,
1668 ERR70, ERRCOUNT };
1669
1670 /* The real format of the start of the pcre block; the index of names and the
1671 code vector run on as long as necessary after the end. We store an explicit
1672 offset to the name table so that if a regex is compiled on one host, saved, and
1673 then run on another where the size of pointers is different, all might still
1674 be well. For the case of compiled-on-4 and run-on-8, we include an extra
1675 pointer that is always NULL. For future-proofing, a few dummy fields were
1676 originally included - even though you can never get this planning right - but
1677 there is only one left now.
1678
1679 NOTE NOTE NOTE:
1680 Because people can now save and re-use compiled patterns, any additions to this
1681 structure should be made at the end, and something earlier (e.g. a new
1682 flag in the options or one of the dummy fields) should indicate that the new
1683 fields are present. Currently PCRE always sets the dummy fields to zero.
1684 NOTE NOTE NOTE
1685 */
1686
1687 typedef struct real_pcre {
1688 pcre_uint32 magic_number;
1689 pcre_uint32 size; /* Total that was malloced */
1690 pcre_uint32 options; /* Public options */
1691 pcre_uint16 flags; /* Private flags */
1692 pcre_uint16 dummy1; /* For future use */
1693 pcre_uint16 top_bracket;
1694 pcre_uint16 top_backref;
1695 pcre_uint16 first_byte;
1696 pcre_uint16 req_byte;
1697 pcre_uint16 name_table_offset; /* Offset to name table that follows */
1698 pcre_uint16 name_entry_size; /* Size of any name items */
1699 pcre_uint16 name_count; /* Number of name items */
1700 pcre_uint16 ref_count; /* Reference count */
1701
1702 const unsigned char *tables; /* Pointer to tables or NULL for std */
1703 const unsigned char *nullpad; /* NULL padding */
1704 } real_pcre;
1705
1706 /* The format of the block used to store data from pcre_study(). The same
1707 remark (see NOTE above) about extending this structure applies. */
1708
1709 typedef struct pcre_study_data {
1710 pcre_uint32 size; /* Total that was malloced */
1711 pcre_uint32 flags; /* Private flags */
1712 uschar start_bits[32]; /* Starting char bits */
1713 pcre_uint32 minlength; /* Minimum subject length */
1714 } pcre_study_data;
1715
1716 /* Structure for building a chain of open capturing subpatterns during
1717 compiling, so that instructions to close them can be compiled when (*ACCEPT) is
1718 encountered. This is also used to identify subpatterns that contain recursive
1719 back references to themselves, so that they can be made atomic. */
1720
1721 typedef struct open_capitem {
1722 struct open_capitem *next; /* Chain link */
1723 pcre_uint16 number; /* Capture number */
1724 pcre_uint16 flag; /* Set TRUE if recursive back ref */
1725 } open_capitem;
1726
1727 /* Structure for passing "static" information around between the functions
1728 doing the compiling, so that they are thread-safe. */
1729
1730 typedef struct compile_data {
1731 const uschar *lcc; /* Points to lower casing table */
1732 const uschar *fcc; /* Points to case-flipping table */
1733 const uschar *cbits; /* Points to character type table */
1734 const uschar *ctypes; /* Points to table of type maps */
1735 const uschar *start_workspace;/* The start of working space */
1736 const uschar *start_code; /* The start of the compiled code */
1737 const uschar *start_pattern; /* The start of the pattern */
1738 const uschar *end_pattern; /* The end of the pattern */
1739 open_capitem *open_caps; /* Chain of open capture items */
1740 uschar *hwm; /* High watermark of workspace */
1741 uschar *name_table; /* The name/number table */
1742 int names_found; /* Number of entries so far */
1743 int name_entry_size; /* Size of each entry */
1744 int bracount; /* Count of capturing parens as we compile */
1745 int final_bracount; /* Saved value after first pass */
1746 int top_backref; /* Maximum back reference */
1747 unsigned int backref_map; /* Bitmap of low back refs */
1748 int assert_depth; /* Depth of nested assertions */
1749 int external_options; /* External (initial) options */
1750 int external_flags; /* External flag bits to be set */
1751 int req_varyopt; /* "After variable item" flag for reqbyte */
1752 BOOL had_accept; /* (*ACCEPT) encountered */
1753 BOOL check_lookbehind; /* Lookbehinds need later checking */
1754 int nltype; /* Newline type */
1755 int nllen; /* Newline string length */
1756 uschar nl[4]; /* Newline string when fixed length */
1757 } compile_data;
1758
1759 /* Structure for maintaining a chain of pointers to the currently incomplete
1760 branches, for testing for left recursion while compiling. */
1761
1762 typedef struct branch_chain {
1763 struct branch_chain *outer;
1764 uschar *current_branch;
1765 } branch_chain;
1766
1767 /* Structure for items in a linked list that represents an explicit recursive
1768 call within the pattern; used by pcre_exec(). */
1769
1770 typedef struct recursion_info {
1771 struct recursion_info *prevrec; /* Previous recursion record (or NULL) */
1772 int group_num; /* Number of group that was called */
1773 int *offset_save; /* Pointer to start of saved offsets */
1774 int saved_max; /* Number of saved offsets */
1775 USPTR subject_position; /* Position at start of recursion */
1776 } recursion_info;
1777
1778 /* A similar structure for pcre_dfa_exec(). */
1779
1780 typedef struct dfa_recursion_info {
1781 struct dfa_recursion_info *prevrec;
1782 int group_num;
1783 USPTR subject_position;
1784 } dfa_recursion_info;
1785
1786 /* Structure for building a chain of data for holding the values of the subject
1787 pointer at the start of each subpattern, so as to detect when an empty string
1788 has been matched by a subpattern - to break infinite loops; used by
1789 pcre_exec(). */
1790
1791 typedef struct eptrblock {
1792 struct eptrblock *epb_prev;
1793 USPTR epb_saved_eptr;
1794 } eptrblock;
1795
1796
1797 /* Structure for passing "static" information around between the functions
1798 doing traditional NFA matching, so that they are thread-safe. */
1799
1800 typedef struct match_data {
1801 unsigned long int match_call_count; /* As it says */
1802 unsigned long int match_limit; /* As it says */
1803 unsigned long int match_limit_recursion; /* As it says */
1804 int *offset_vector; /* Offset vector */
1805 int offset_end; /* One past the end */
1806 int offset_max; /* The maximum usable for return data */
1807 int nltype; /* Newline type */
1808 int nllen; /* Newline string length */
1809 int name_count; /* Number of names in name table */
1810 int name_entry_size; /* Size of entry in names table */
1811 uschar *name_table; /* Table of names */
1812 uschar nl[4]; /* Newline string when fixed */
1813 const uschar *lcc; /* Points to lower casing table */
1814 const uschar *ctypes; /* Points to table of type maps */
1815 BOOL offset_overflow; /* Set if too many extractions */
1816 BOOL notbol; /* NOTBOL flag */
1817 BOOL noteol; /* NOTEOL flag */
1818 BOOL utf8; /* UTF8 flag */
1819 BOOL jscript_compat; /* JAVASCRIPT_COMPAT flag */
1820 BOOL use_ucp; /* PCRE_UCP flag */
1821 BOOL endonly; /* Dollar not before final \n */
1822 BOOL notempty; /* Empty string match not wanted */
1823 BOOL notempty_atstart; /* Empty string match at start not wanted */
1824 BOOL hitend; /* Hit the end of the subject at some point */
1825 BOOL bsr_anycrlf; /* \R is just any CRLF, not full Unicode */
1826 BOOL hasthen; /* Pattern contains (*THEN) */
1827 const uschar *start_code; /* For use when recursing */
1828 USPTR start_subject; /* Start of the subject string */
1829 USPTR end_subject; /* End of the subject string */
1830 USPTR start_match_ptr; /* Start of matched string */
1831 USPTR end_match_ptr; /* Subject position at end match */
1832 USPTR start_used_ptr; /* Earliest consulted character */
1833 int partial; /* PARTIAL options */
1834 int end_offset_top; /* Highwater mark at end of match */
1835 int capture_last; /* Most recent capture number */
1836 int start_offset; /* The start offset value */
1837 int match_function_type; /* Set for certain special calls of MATCH() */
1838 eptrblock *eptrchain; /* Chain of eptrblocks for tail recursions */
1839 int eptrn; /* Next free eptrblock */
1840 recursion_info *recursive; /* Linked list of recursion data */
1841 void *callout_data; /* To pass back to callouts */
1842 const uschar *mark; /* Mark pointer to pass back */
1843 const uschar *once_target; /* Where to back up to for atomic groups */
1844 } match_data;
1845
1846 /* A similar structure is used for the same purpose by the DFA matching
1847 functions. */
1848
1849 typedef struct dfa_match_data {
1850 const uschar *start_code; /* Start of the compiled pattern */
1851 const uschar *start_subject; /* Start of the subject string */
1852 const uschar *end_subject; /* End of subject string */
1853 const uschar *start_used_ptr; /* Earliest consulted character */
1854 const uschar *tables; /* Character tables */
1855 int start_offset; /* The start offset value */
1856 int moptions; /* Match options */
1857 int poptions; /* Pattern options */
1858 int nltype; /* Newline type */
1859 int nllen; /* Newline string length */
1860 uschar nl[4]; /* Newline string when fixed */
1861 void *callout_data; /* To pass back to callouts */
1862 dfa_recursion_info *recursive; /* Linked list of recursion data */
1863 } dfa_match_data;
1864
1865 /* Bit definitions for entries in the pcre_ctypes table. */
1866
1867 #define ctype_space 0x01
1868 #define ctype_letter 0x02
1869 #define ctype_digit 0x04
1870 #define ctype_xdigit 0x08
1871 #define ctype_word 0x10 /* alphanumeric or '_' */
1872 #define ctype_meta 0x80 /* regexp meta char or zero (end pattern) */
1873
1874 /* Offsets for the bitmap tables in pcre_cbits. Each table contains a set
1875 of bits for a class map. Some classes are built by combining these tables. */
1876
1877 #define cbit_space 0 /* [:space:] or \s */
1878 #define cbit_xdigit 32 /* [:xdigit:] */
1879 #define cbit_digit 64 /* [:digit:] or \d */
1880 #define cbit_upper 96 /* [:upper:] */
1881 #define cbit_lower 128 /* [:lower:] */
1882 #define cbit_word 160 /* [:word:] or \w */
1883 #define cbit_graph 192 /* [:graph:] */
1884 #define cbit_print 224 /* [:print:] */
1885 #define cbit_punct 256 /* [:punct:] */
1886 #define cbit_cntrl 288 /* [:cntrl:] */
1887 #define cbit_length 320 /* Length of the cbits table */
1888
1889 /* Offsets of the various tables from the base tables pointer, and
1890 total length. */
1891
1892 #define lcc_offset 0
1893 #define fcc_offset 256
1894 #define cbits_offset 512
1895 #define ctypes_offset (cbits_offset + cbit_length)
1896 #define tables_length (ctypes_offset + 256)
1897
1898 /* Layout of the UCP type table that translates property names into types and
1899 codes. Each entry used to point directly to a name, but to reduce the number of
1900 relocations in shared libraries, it now has an offset into a single string
1901 instead. */
1902
1903 typedef struct {
1904 pcre_uint16 name_offset;
1905 pcre_uint16 type;
1906 pcre_uint16 value;
1907 } ucp_type_table;
1908
1909
1910 /* Internal shared data tables. These are tables that are used by more than one
1911 of the exported public functions. They have to be "external" in the C sense,
1912 but are not part of the PCRE public API. The data for these tables is in the
1913 pcre_tables.c module. */
1914
1915 extern const int _pcre_utf8_table1[];
1916 extern const int _pcre_utf8_table2[];
1917 extern const int _pcre_utf8_table3[];
1918 extern const uschar _pcre_utf8_table4[];
1919
1920 #ifdef SUPPORT_JIT
1921 extern const uschar _pcre_utf8_char_sizes[];
1922 #endif
1923
1924 extern const int _pcre_utf8_table1_size;
1925
1926 extern const char _pcre_utt_names[];
1927 extern const ucp_type_table _pcre_utt[];
1928 extern const int _pcre_utt_size;
1929
1930 extern const uschar _pcre_default_tables[];
1931
1932 extern const uschar _pcre_OP_lengths[];
1933
1934
1935 /* Internal shared functions. These are functions that are used by more than
1936 one of the exported public functions. They have to be "external" in the C
1937 sense, but are not part of the PCRE public API. */
1938
1939 extern const uschar *_pcre_find_bracket(const uschar *, BOOL, int);
1940 extern BOOL _pcre_is_newline(USPTR, int, USPTR, int *, BOOL);
1941 extern int _pcre_ord2utf8(int, uschar *);
1942 extern real_pcre *_pcre_try_flipped(const real_pcre *, real_pcre *,
1943 const pcre_study_data *, pcre_study_data *);
1944 extern int _pcre_valid_utf8(USPTR, int, int *);
1945 extern BOOL _pcre_was_newline(USPTR, int, USPTR, int *, BOOL);
1946 extern BOOL _pcre_xclass(int, const uschar *);
1947
1948 #ifdef SUPPORT_JIT
1949 extern void _pcre_jit_compile(const real_pcre *, pcre_extra *);
1950 extern int _pcre_jit_exec(const real_pcre *, void *, PCRE_SPTR,
1951 int, int, int, int, int *, int);
1952 extern void _pcre_jit_free(void *);
1953 #endif
1954
1955 /* Unicode character database (UCD) */
1956
1957 typedef struct {
1958 uschar script;
1959 uschar chartype;
1960 pcre_int32 other_case;
1961 } ucd_record;
1962
1963 extern const ucd_record _pcre_ucd_records[];
1964 extern const uschar _pcre_ucd_stage1[];
1965 extern const pcre_uint16 _pcre_ucd_stage2[];
1966 extern const int _pcre_ucp_gentype[];
1967 #ifdef SUPPORT_JIT
1968 extern const int _pcre_ucp_typerange[];
1969 #endif
1970
1971 /* UCD access macros */
1972
1973 #define UCD_BLOCK_SIZE 128
1974 #define GET_UCD(ch) (_pcre_ucd_records + \
1975 _pcre_ucd_stage2[_pcre_ucd_stage1[(ch) / UCD_BLOCK_SIZE] * \
1976 UCD_BLOCK_SIZE + (ch) % UCD_BLOCK_SIZE])
1977
1978 #define UCD_CHARTYPE(ch) GET_UCD(ch)->chartype
1979 #define UCD_SCRIPT(ch) GET_UCD(ch)->script
1980 #define UCD_CATEGORY(ch) _pcre_ucp_gentype[UCD_CHARTYPE(ch)]
1981 #define UCD_OTHERCASE(ch) (ch + GET_UCD(ch)->other_case)
1982
1983 #endif
1984
1985 /* End of pcre_internal.h */

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