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Revision 462 - (show annotations) (download)
Sat Oct 17 19:55:02 2009 UTC (4 years, 9 months ago) by ph10
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Fix PCRE_PARTIAL_HARD for patterns that end optionally, e.g. abc*

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) 1997-2009 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 DEBUG to get debugging output on stdout. */
49
50 #if 0
51 #define 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 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 <setjmp.h>
90 #include <stdarg.h>
91 #include <stddef.h>
92 #include <stdio.h>
93 #include <stdlib.h>
94 #include <string.h>
95
96 /* When compiling a DLL for Windows, the exported symbols have to be declared
97 using some MS magic. I found some useful information on this web page:
98 http://msdn2.microsoft.com/en-us/library/y4h7bcy6(VS.80).aspx. According to the
99 information there, using __declspec(dllexport) without "extern" we have a
100 definition; with "extern" we have a declaration. The settings here override the
101 setting in pcre.h (which is included below); it defines only PCRE_EXP_DECL,
102 which is all that is needed for applications (they just import the symbols). We
103 use:
104
105 PCRE_EXP_DECL for declarations
106 PCRE_EXP_DEFN for definitions of exported functions
107 PCRE_EXP_DATA_DEFN for definitions of exported variables
108
109 The reason for the two DEFN macros is that in non-Windows environments, one
110 does not want to have "extern" before variable definitions because it leads to
111 compiler warnings. So we distinguish between functions and variables. In
112 Windows, the two should always be the same.
113
114 The reason for wrapping this in #ifndef PCRE_EXP_DECL is so that pcretest,
115 which is an application, but needs to import this file in order to "peek" at
116 internals, can #include pcre.h first to get an application's-eye view.
117
118 In principle, people compiling for non-Windows, non-Unix-like (i.e. uncommon,
119 special-purpose environments) might want to stick other stuff in front of
120 exported symbols. That's why, in the non-Windows case, we set PCRE_EXP_DEFN and
121 PCRE_EXP_DATA_DEFN only if they are not already set. */
122
123 #ifndef PCRE_EXP_DECL
124 # ifdef _WIN32
125 # ifndef PCRE_STATIC
126 # define PCRE_EXP_DECL extern __declspec(dllexport)
127 # define PCRE_EXP_DEFN __declspec(dllexport)
128 # define PCRE_EXP_DATA_DEFN __declspec(dllexport)
129 # else
130 # define PCRE_EXP_DECL extern
131 # define PCRE_EXP_DEFN
132 # define PCRE_EXP_DATA_DEFN
133 # endif
134 # else
135 # ifdef __cplusplus
136 # define PCRE_EXP_DECL extern "C"
137 # else
138 # define PCRE_EXP_DECL extern
139 # endif
140 # ifndef PCRE_EXP_DEFN
141 # define PCRE_EXP_DEFN PCRE_EXP_DECL
142 # endif
143 # ifndef PCRE_EXP_DATA_DEFN
144 # define PCRE_EXP_DATA_DEFN
145 # endif
146 # endif
147 #endif
148
149 /* When compiling with the MSVC compiler, it is sometimes necessary to include
150 a "calling convention" before exported function names. (This is secondhand
151 information; I know nothing about MSVC myself). For example, something like
152
153 void __cdecl function(....)
154
155 might be needed. In order so make this easy, all the exported functions have
156 PCRE_CALL_CONVENTION just before their names. It is rarely needed; if not
157 set, we ensure here that it has no effect. */
158
159 #ifndef PCRE_CALL_CONVENTION
160 #define PCRE_CALL_CONVENTION
161 #endif
162
163 /* We need to have types that specify unsigned 16-bit and 32-bit integers. We
164 cannot determine these outside the compilation (e.g. by running a program as
165 part of "configure") because PCRE is often cross-compiled for use on other
166 systems. Instead we make use of the maximum sizes that are available at
167 preprocessor time in standard C environments. */
168
169 #if USHRT_MAX == 65535
170 typedef unsigned short pcre_uint16;
171 typedef short pcre_int16;
172 #elif UINT_MAX == 65535
173 typedef unsigned int pcre_uint16;
174 typedef int pcre_int16;
175 #else
176 #error Cannot determine a type for 16-bit unsigned integers
177 #endif
178
179 #if UINT_MAX == 4294967295
180 typedef unsigned int pcre_uint32;
181 typedef int pcre_int32;
182 #elif ULONG_MAX == 4294967295
183 typedef unsigned long int pcre_uint32;
184 typedef long int pcre_int32;
185 #else
186 #error Cannot determine a type for 32-bit unsigned integers
187 #endif
188
189 /* All character handling must be done as unsigned characters. Otherwise there
190 are problems with top-bit-set characters and functions such as isspace().
191 However, we leave the interface to the outside world as char *, because that
192 should make things easier for callers. We define a short type for unsigned char
193 to save lots of typing. I tried "uchar", but it causes problems on Digital
194 Unix, where it is defined in sys/types, so use "uschar" instead. */
195
196 typedef unsigned char uschar;
197
198 /* This is an unsigned int value that no character can ever have. UTF-8
199 characters only go up to 0x7fffffff (though Unicode doesn't go beyond
200 0x0010ffff). */
201
202 #define NOTACHAR 0xffffffff
203
204 /* PCRE is able to support several different kinds of newline (CR, LF, CRLF,
205 "any" and "anycrlf" at present). The following macros are used to package up
206 testing for newlines. NLBLOCK, PSSTART, and PSEND are defined in the various
207 modules to indicate in which datablock the parameters exist, and what the
208 start/end of string field names are. */
209
210 #define NLTYPE_FIXED 0 /* Newline is a fixed length string */
211 #define NLTYPE_ANY 1 /* Newline is any Unicode line ending */
212 #define NLTYPE_ANYCRLF 2 /* Newline is CR, LF, or CRLF */
213
214 /* This macro checks for a newline at the given position */
215
216 #define IS_NEWLINE(p) \
217 ((NLBLOCK->nltype != NLTYPE_FIXED)? \
218 ((p) < NLBLOCK->PSEND && \
219 _pcre_is_newline((p), NLBLOCK->nltype, NLBLOCK->PSEND, &(NLBLOCK->nllen),\
220 utf8)) \
221 : \
222 ((p) <= NLBLOCK->PSEND - NLBLOCK->nllen && \
223 (p)[0] == NLBLOCK->nl[0] && \
224 (NLBLOCK->nllen == 1 || (p)[1] == NLBLOCK->nl[1]) \
225 ) \
226 )
227
228 /* This macro checks for a newline immediately preceding the given position */
229
230 #define WAS_NEWLINE(p) \
231 ((NLBLOCK->nltype != NLTYPE_FIXED)? \
232 ((p) > NLBLOCK->PSSTART && \
233 _pcre_was_newline((p), NLBLOCK->nltype, NLBLOCK->PSSTART, \
234 &(NLBLOCK->nllen), utf8)) \
235 : \
236 ((p) >= NLBLOCK->PSSTART + NLBLOCK->nllen && \
237 (p)[-NLBLOCK->nllen] == NLBLOCK->nl[0] && \
238 (NLBLOCK->nllen == 1 || (p)[-NLBLOCK->nllen+1] == NLBLOCK->nl[1]) \
239 ) \
240 )
241
242 /* When PCRE is compiled as a C++ library, the subject pointer can be replaced
243 with a custom type. This makes it possible, for example, to allow pcre_exec()
244 to process subject strings that are discontinuous by using a smart pointer
245 class. It must always be possible to inspect all of the subject string in
246 pcre_exec() because of the way it backtracks. Two macros are required in the
247 normal case, for sign-unspecified and unsigned char pointers. The former is
248 used for the external interface and appears in pcre.h, which is why its name
249 must begin with PCRE_. */
250
251 #ifdef CUSTOM_SUBJECT_PTR
252 #define PCRE_SPTR CUSTOM_SUBJECT_PTR
253 #define USPTR CUSTOM_SUBJECT_PTR
254 #else
255 #define PCRE_SPTR const char *
256 #define USPTR const unsigned char *
257 #endif
258
259
260
261 /* Include the public PCRE header and the definitions of UCP character property
262 values. */
263
264 #include "pcre.h"
265 #include "ucp.h"
266
267 /* When compiling for use with the Virtual Pascal compiler, these functions
268 need to have their names changed. PCRE must be compiled with the -DVPCOMPAT
269 option on the command line. */
270
271 #ifdef VPCOMPAT
272 #define strlen(s) _strlen(s)
273 #define strncmp(s1,s2,m) _strncmp(s1,s2,m)
274 #define memcmp(s,c,n) _memcmp(s,c,n)
275 #define memcpy(d,s,n) _memcpy(d,s,n)
276 #define memmove(d,s,n) _memmove(d,s,n)
277 #define memset(s,c,n) _memset(s,c,n)
278 #else /* VPCOMPAT */
279
280 /* To cope with SunOS4 and other systems that lack memmove() but have bcopy(),
281 define a macro for memmove() if HAVE_MEMMOVE is false, provided that HAVE_BCOPY
282 is set. Otherwise, include an emulating function for those systems that have
283 neither (there some non-Unix environments where this is the case). */
284
285 #ifndef HAVE_MEMMOVE
286 #undef memmove /* some systems may have a macro */
287 #ifdef HAVE_BCOPY
288 #define memmove(a, b, c) bcopy(b, a, c)
289 #else /* HAVE_BCOPY */
290 static void *
291 pcre_memmove(void *d, const void *s, size_t n)
292 {
293 size_t i;
294 unsigned char *dest = (unsigned char *)d;
295 const unsigned char *src = (const unsigned char *)s;
296 if (dest > src)
297 {
298 dest += n;
299 src += n;
300 for (i = 0; i < n; ++i) *(--dest) = *(--src);
301 return (void *)dest;
302 }
303 else
304 {
305 for (i = 0; i < n; ++i) *dest++ = *src++;
306 return (void *)(dest - n);
307 }
308 }
309 #define memmove(a, b, c) pcre_memmove(a, b, c)
310 #endif /* not HAVE_BCOPY */
311 #endif /* not HAVE_MEMMOVE */
312 #endif /* not VPCOMPAT */
313
314
315 /* PCRE keeps offsets in its compiled code as 2-byte quantities (always stored
316 in big-endian order) by default. These are used, for example, to link from the
317 start of a subpattern to its alternatives and its end. The use of 2 bytes per
318 offset limits the size of the compiled regex to around 64K, which is big enough
319 for almost everybody. However, I received a request for an even bigger limit.
320 For this reason, and also to make the code easier to maintain, the storing and
321 loading of offsets from the byte string is now handled by the macros that are
322 defined here.
323
324 The macros are controlled by the value of LINK_SIZE. This defaults to 2 in
325 the config.h file, but can be overridden by using -D on the command line. This
326 is automated on Unix systems via the "configure" command. */
327
328 #if LINK_SIZE == 2
329
330 #define PUT(a,n,d) \
331 (a[n] = (d) >> 8), \
332 (a[(n)+1] = (d) & 255)
333
334 #define GET(a,n) \
335 (((a)[n] << 8) | (a)[(n)+1])
336
337 #define MAX_PATTERN_SIZE (1 << 16)
338
339
340 #elif LINK_SIZE == 3
341
342 #define PUT(a,n,d) \
343 (a[n] = (d) >> 16), \
344 (a[(n)+1] = (d) >> 8), \
345 (a[(n)+2] = (d) & 255)
346
347 #define GET(a,n) \
348 (((a)[n] << 16) | ((a)[(n)+1] << 8) | (a)[(n)+2])
349
350 #define MAX_PATTERN_SIZE (1 << 24)
351
352
353 #elif LINK_SIZE == 4
354
355 #define PUT(a,n,d) \
356 (a[n] = (d) >> 24), \
357 (a[(n)+1] = (d) >> 16), \
358 (a[(n)+2] = (d) >> 8), \
359 (a[(n)+3] = (d) & 255)
360
361 #define GET(a,n) \
362 (((a)[n] << 24) | ((a)[(n)+1] << 16) | ((a)[(n)+2] << 8) | (a)[(n)+3])
363
364 #define MAX_PATTERN_SIZE (1 << 30) /* Keep it positive */
365
366
367 #else
368 #error LINK_SIZE must be either 2, 3, or 4
369 #endif
370
371
372 /* Convenience macro defined in terms of the others */
373
374 #define PUTINC(a,n,d) PUT(a,n,d), a += LINK_SIZE
375
376
377 /* PCRE uses some other 2-byte quantities that do not change when the size of
378 offsets changes. There are used for repeat counts and for other things such as
379 capturing parenthesis numbers in back references. */
380
381 #define PUT2(a,n,d) \
382 a[n] = (d) >> 8; \
383 a[(n)+1] = (d) & 255
384
385 #define GET2(a,n) \
386 (((a)[n] << 8) | (a)[(n)+1])
387
388 #define PUT2INC(a,n,d) PUT2(a,n,d), a += 2
389
390
391 /* When UTF-8 encoding is being used, a character is no longer just a single
392 byte. The macros for character handling generate simple sequences when used in
393 byte-mode, and more complicated ones for UTF-8 characters. BACKCHAR should
394 never be called in byte mode. To make sure it can never even appear when UTF-8
395 support is omitted, we don't even define it. */
396
397 #ifndef SUPPORT_UTF8
398 #define GETCHAR(c, eptr) c = *eptr;
399 #define GETCHARTEST(c, eptr) c = *eptr;
400 #define GETCHARINC(c, eptr) c = *eptr++;
401 #define GETCHARINCTEST(c, eptr) c = *eptr++;
402 #define GETCHARLEN(c, eptr, len) c = *eptr;
403 /* #define BACKCHAR(eptr) */
404
405 #else /* SUPPORT_UTF8 */
406
407 /* Get the next UTF-8 character, not advancing the pointer. This is called when
408 we know we are in UTF-8 mode. */
409
410 #define GETCHAR(c, eptr) \
411 c = *eptr; \
412 if (c >= 0xc0) \
413 { \
414 int gcii; \
415 int gcaa = _pcre_utf8_table4[c & 0x3f]; /* Number of additional bytes */ \
416 int gcss = 6*gcaa; \
417 c = (c & _pcre_utf8_table3[gcaa]) << gcss; \
418 for (gcii = 1; gcii <= gcaa; gcii++) \
419 { \
420 gcss -= 6; \
421 c |= (eptr[gcii] & 0x3f) << gcss; \
422 } \
423 }
424
425 /* Get the next UTF-8 character, testing for UTF-8 mode, and not advancing the
426 pointer. */
427
428 #define GETCHARTEST(c, eptr) \
429 c = *eptr; \
430 if (utf8 && c >= 0xc0) \
431 { \
432 int gcii; \
433 int gcaa = _pcre_utf8_table4[c & 0x3f]; /* Number of additional bytes */ \
434 int gcss = 6*gcaa; \
435 c = (c & _pcre_utf8_table3[gcaa]) << gcss; \
436 for (gcii = 1; gcii <= gcaa; gcii++) \
437 { \
438 gcss -= 6; \
439 c |= (eptr[gcii] & 0x3f) << gcss; \
440 } \
441 }
442
443 /* Get the next UTF-8 character, advancing the pointer. This is called when we
444 know we are in UTF-8 mode. */
445
446 #define GETCHARINC(c, eptr) \
447 c = *eptr++; \
448 if (c >= 0xc0) \
449 { \
450 int gcaa = _pcre_utf8_table4[c & 0x3f]; /* Number of additional bytes */ \
451 int gcss = 6*gcaa; \
452 c = (c & _pcre_utf8_table3[gcaa]) << gcss; \
453 while (gcaa-- > 0) \
454 { \
455 gcss -= 6; \
456 c |= (*eptr++ & 0x3f) << gcss; \
457 } \
458 }
459
460 /* Get the next character, testing for UTF-8 mode, and advancing the pointer */
461
462 #define GETCHARINCTEST(c, eptr) \
463 c = *eptr++; \
464 if (utf8 && c >= 0xc0) \
465 { \
466 int gcaa = _pcre_utf8_table4[c & 0x3f]; /* Number of additional bytes */ \
467 int gcss = 6*gcaa; \
468 c = (c & _pcre_utf8_table3[gcaa]) << gcss; \
469 while (gcaa-- > 0) \
470 { \
471 gcss -= 6; \
472 c |= (*eptr++ & 0x3f) << gcss; \
473 } \
474 }
475
476 /* Get the next UTF-8 character, not advancing the pointer, incrementing length
477 if there are extra bytes. This is called when we know we are in UTF-8 mode. */
478
479 #define GETCHARLEN(c, eptr, len) \
480 c = *eptr; \
481 if (c >= 0xc0) \
482 { \
483 int gcii; \
484 int gcaa = _pcre_utf8_table4[c & 0x3f]; /* Number of additional bytes */ \
485 int gcss = 6*gcaa; \
486 c = (c & _pcre_utf8_table3[gcaa]) << gcss; \
487 for (gcii = 1; gcii <= gcaa; gcii++) \
488 { \
489 gcss -= 6; \
490 c |= (eptr[gcii] & 0x3f) << gcss; \
491 } \
492 len += gcaa; \
493 }
494
495 /* Get the next UTF-8 character, testing for UTF-8 mode, not advancing the
496 pointer, incrementing length if there are extra bytes. This is called when we
497 know we are in UTF-8 mode. */
498
499 #define GETCHARLENTEST(c, eptr, len) \
500 c = *eptr; \
501 if (utf8 && c >= 0xc0) \
502 { \
503 int gcii; \
504 int gcaa = _pcre_utf8_table4[c & 0x3f]; /* Number of additional bytes */ \
505 int gcss = 6*gcaa; \
506 c = (c & _pcre_utf8_table3[gcaa]) << gcss; \
507 for (gcii = 1; gcii <= gcaa; gcii++) \
508 { \
509 gcss -= 6; \
510 c |= (eptr[gcii] & 0x3f) << gcss; \
511 } \
512 len += gcaa; \
513 }
514
515 /* If the pointer is not at the start of a character, move it back until
516 it is. This is called only in UTF-8 mode - we don't put a test within the macro
517 because almost all calls are already within a block of UTF-8 only code. */
518
519 #define BACKCHAR(eptr) while((*eptr & 0xc0) == 0x80) eptr--
520
521 #endif
522
523
524 /* In case there is no definition of offsetof() provided - though any proper
525 Standard C system should have one. */
526
527 #ifndef offsetof
528 #define offsetof(p_type,field) ((size_t)&(((p_type *)0)->field))
529 #endif
530
531
532 /* These are the public options that can change during matching. */
533
534 #define PCRE_IMS (PCRE_CASELESS|PCRE_MULTILINE|PCRE_DOTALL)
535
536 /* Private flags containing information about the compiled regex. They used to
537 live at the top end of the options word, but that got almost full, so now they
538 are in a 16-bit flags word. From release 8.00, PCRE_NOPARTIAL is unused, as
539 the restrictions on partial matching have been lifted. It remains for backwards
540 compatibility. */
541
542 #define PCRE_NOPARTIAL 0x0001 /* can't use partial with this regex */
543 #define PCRE_FIRSTSET 0x0002 /* first_byte is set */
544 #define PCRE_REQCHSET 0x0004 /* req_byte is set */
545 #define PCRE_STARTLINE 0x0008 /* start after \n for multiline */
546 #define PCRE_JCHANGED 0x0010 /* j option used in regex */
547 #define PCRE_HASCRORLF 0x0020 /* explicit \r or \n in pattern */
548
549 /* Options for the "extra" block produced by pcre_study(). */
550
551 #define PCRE_STUDY_MAPPED 0x01 /* a map of starting chars exists */
552 #define PCRE_STUDY_MINLEN 0x02 /* a minimum length field exists */
553
554 /* Masks for identifying the public options that are permitted at compile
555 time, run time, or study time, respectively. */
556
557 #define PCRE_NEWLINE_BITS (PCRE_NEWLINE_CR|PCRE_NEWLINE_LF|PCRE_NEWLINE_ANY| \
558 PCRE_NEWLINE_ANYCRLF)
559
560 #define PUBLIC_COMPILE_OPTIONS \
561 (PCRE_CASELESS|PCRE_EXTENDED|PCRE_ANCHORED|PCRE_MULTILINE| \
562 PCRE_DOTALL|PCRE_DOLLAR_ENDONLY|PCRE_EXTRA|PCRE_UNGREEDY|PCRE_UTF8| \
563 PCRE_NO_AUTO_CAPTURE|PCRE_NO_UTF8_CHECK|PCRE_AUTO_CALLOUT|PCRE_FIRSTLINE| \
564 PCRE_DUPNAMES|PCRE_NEWLINE_BITS|PCRE_BSR_ANYCRLF|PCRE_BSR_UNICODE| \
565 PCRE_JAVASCRIPT_COMPAT)
566
567 #define PUBLIC_EXEC_OPTIONS \
568 (PCRE_ANCHORED|PCRE_NOTBOL|PCRE_NOTEOL|PCRE_NOTEMPTY|PCRE_NOTEMPTY_ATSTART| \
569 PCRE_NO_UTF8_CHECK|PCRE_PARTIAL_HARD|PCRE_PARTIAL_SOFT|PCRE_NEWLINE_BITS| \
570 PCRE_BSR_ANYCRLF|PCRE_BSR_UNICODE|PCRE_NO_START_OPTIMIZE)
571
572 #define PUBLIC_DFA_EXEC_OPTIONS \
573 (PCRE_ANCHORED|PCRE_NOTBOL|PCRE_NOTEOL|PCRE_NOTEMPTY|PCRE_NOTEMPTY_ATSTART| \
574 PCRE_NO_UTF8_CHECK|PCRE_PARTIAL_HARD|PCRE_PARTIAL_SOFT|PCRE_DFA_SHORTEST| \
575 PCRE_DFA_RESTART|PCRE_NEWLINE_BITS|PCRE_BSR_ANYCRLF|PCRE_BSR_UNICODE| \
576 PCRE_NO_START_OPTIMIZE)
577
578 #define PUBLIC_STUDY_OPTIONS 0 /* None defined */
579
580 /* Magic number to provide a small check against being handed junk. Also used
581 to detect whether a pattern was compiled on a host of different endianness. */
582
583 #define MAGIC_NUMBER 0x50435245UL /* 'PCRE' */
584
585 /* Negative values for the firstchar and reqchar variables */
586
587 #define REQ_UNSET (-2)
588 #define REQ_NONE (-1)
589
590 /* The maximum remaining length of subject we are prepared to search for a
591 req_byte match. */
592
593 #define REQ_BYTE_MAX 1000
594
595 /* Flags added to firstbyte or reqbyte; a "non-literal" item is either a
596 variable-length repeat, or a anything other than literal characters. */
597
598 #define REQ_CASELESS 0x0100 /* indicates caselessness */
599 #define REQ_VARY 0x0200 /* reqbyte followed non-literal item */
600
601 /* Miscellaneous definitions. The #ifndef is to pacify compiler warnings in
602 environments where these macros are defined elsewhere. Unfortunately, there
603 is no way to do the same for the typedef. */
604
605 typedef int BOOL;
606
607 #ifndef FALSE
608 #define FALSE 0
609 #define TRUE 1
610 #endif
611
612 /* If PCRE is to support UTF-8 on EBCDIC platforms, we cannot use normal
613 character constants like '*' because the compiler would emit their EBCDIC code,
614 which is different from their ASCII/UTF-8 code. Instead we define macros for
615 the characters so that they always use the ASCII/UTF-8 code when UTF-8 support
616 is enabled. When UTF-8 support is not enabled, the definitions use character
617 literals. Both character and string versions of each character are needed, and
618 there are some longer strings as well.
619
620 This means that, on EBCDIC platforms, the PCRE library can handle either
621 EBCDIC, or UTF-8, but not both. To support both in the same compiled library
622 would need different lookups depending on whether PCRE_UTF8 was set or not.
623 This would make it impossible to use characters in switch/case statements,
624 which would reduce performance. For a theoretical use (which nobody has asked
625 for) in a minority area (EBCDIC platforms), this is not sensible. Any
626 application that did need both could compile two versions of the library, using
627 macros to give the functions distinct names. */
628
629 #ifndef SUPPORT_UTF8
630
631 /* UTF-8 support is not enabled; use the platform-dependent character literals
632 so that PCRE works on both ASCII and EBCDIC platforms, in non-UTF-mode only. */
633
634 #define CHAR_HT '\t'
635 #define CHAR_VT '\v'
636 #define CHAR_FF '\f'
637 #define CHAR_CR '\r'
638 #define CHAR_NL '\n'
639 #define CHAR_BS '\b'
640 #define CHAR_BEL '\a'
641 #ifdef EBCDIC
642 #define CHAR_ESC '\047'
643 #define CHAR_DEL '\007'
644 #else
645 #define CHAR_ESC '\033'
646 #define CHAR_DEL '\177'
647 #endif
648
649 #define CHAR_SPACE ' '
650 #define CHAR_EXCLAMATION_MARK '!'
651 #define CHAR_QUOTATION_MARK '"'
652 #define CHAR_NUMBER_SIGN '#'
653 #define CHAR_DOLLAR_SIGN '$'
654 #define CHAR_PERCENT_SIGN '%'
655 #define CHAR_AMPERSAND '&'
656 #define CHAR_APOSTROPHE '\''
657 #define CHAR_LEFT_PARENTHESIS '('
658 #define CHAR_RIGHT_PARENTHESIS ')'
659 #define CHAR_ASTERISK '*'
660 #define CHAR_PLUS '+'
661 #define CHAR_COMMA ','
662 #define CHAR_MINUS '-'
663 #define CHAR_DOT '.'
664 #define CHAR_SLASH '/'
665 #define CHAR_0 '0'
666 #define CHAR_1 '1'
667 #define CHAR_2 '2'
668 #define CHAR_3 '3'
669 #define CHAR_4 '4'
670 #define CHAR_5 '5'
671 #define CHAR_6 '6'
672 #define CHAR_7 '7'
673 #define CHAR_8 '8'
674 #define CHAR_9 '9'
675 #define CHAR_COLON ':'
676 #define CHAR_SEMICOLON ';'
677 #define CHAR_LESS_THAN_SIGN '<'
678 #define CHAR_EQUALS_SIGN '='
679 #define CHAR_GREATER_THAN_SIGN '>'
680 #define CHAR_QUESTION_MARK '?'
681 #define CHAR_COMMERCIAL_AT '@'
682 #define CHAR_A 'A'
683 #define CHAR_B 'B'
684 #define CHAR_C 'C'
685 #define CHAR_D 'D'
686 #define CHAR_E 'E'
687 #define CHAR_F 'F'
688 #define CHAR_G 'G'
689 #define CHAR_H 'H'
690 #define CHAR_I 'I'
691 #define CHAR_J 'J'
692 #define CHAR_K 'K'
693 #define CHAR_L 'L'
694 #define CHAR_M 'M'
695 #define CHAR_N 'N'
696 #define CHAR_O 'O'
697 #define CHAR_P 'P'
698 #define CHAR_Q 'Q'
699 #define CHAR_R 'R'
700 #define CHAR_S 'S'
701 #define CHAR_T 'T'
702 #define CHAR_U 'U'
703 #define CHAR_V 'V'
704 #define CHAR_W 'W'
705 #define CHAR_X 'X'
706 #define CHAR_Y 'Y'
707 #define CHAR_Z 'Z'
708 #define CHAR_LEFT_SQUARE_BRACKET '['
709 #define CHAR_BACKSLASH '\\'
710 #define CHAR_RIGHT_SQUARE_BRACKET ']'
711 #define CHAR_CIRCUMFLEX_ACCENT '^'
712 #define CHAR_UNDERSCORE '_'
713 #define CHAR_GRAVE_ACCENT '`'
714 #define CHAR_a 'a'
715 #define CHAR_b 'b'
716 #define CHAR_c 'c'
717 #define CHAR_d 'd'
718 #define CHAR_e 'e'
719 #define CHAR_f 'f'
720 #define CHAR_g 'g'
721 #define CHAR_h 'h'
722 #define CHAR_i 'i'
723 #define CHAR_j 'j'
724 #define CHAR_k 'k'
725 #define CHAR_l 'l'
726 #define CHAR_m 'm'
727 #define CHAR_n 'n'
728 #define CHAR_o 'o'
729 #define CHAR_p 'p'
730 #define CHAR_q 'q'
731 #define CHAR_r 'r'
732 #define CHAR_s 's'
733 #define CHAR_t 't'
734 #define CHAR_u 'u'
735 #define CHAR_v 'v'
736 #define CHAR_w 'w'
737 #define CHAR_x 'x'
738 #define CHAR_y 'y'
739 #define CHAR_z 'z'
740 #define CHAR_LEFT_CURLY_BRACKET '{'
741 #define CHAR_VERTICAL_LINE '|'
742 #define CHAR_RIGHT_CURLY_BRACKET '}'
743 #define CHAR_TILDE '~'
744
745 #define STR_HT "\t"
746 #define STR_VT "\v"
747 #define STR_FF "\f"
748 #define STR_CR "\r"
749 #define STR_NL "\n"
750 #define STR_BS "\b"
751 #define STR_BEL "\a"
752 #ifdef EBCDIC
753 #define STR_ESC "\047"
754 #define STR_DEL "\007"
755 #else
756 #define STR_ESC "\033"
757 #define STR_DEL "\177"
758 #endif
759
760 #define STR_SPACE " "
761 #define STR_EXCLAMATION_MARK "!"
762 #define STR_QUOTATION_MARK "\""
763 #define STR_NUMBER_SIGN "#"
764 #define STR_DOLLAR_SIGN "$"
765 #define STR_PERCENT_SIGN "%"
766 #define STR_AMPERSAND "&"
767 #define STR_APOSTROPHE "'"
768 #define STR_LEFT_PARENTHESIS "("
769 #define STR_RIGHT_PARENTHESIS ")"
770 #define STR_ASTERISK "*"
771 #define STR_PLUS "+"
772 #define STR_COMMA ","
773 #define STR_MINUS "-"
774 #define STR_DOT "."
775 #define STR_SLASH "/"
776 #define STR_0 "0"
777 #define STR_1 "1"
778 #define STR_2 "2"
779 #define STR_3 "3"
780 #define STR_4 "4"
781 #define STR_5 "5"
782 #define STR_6 "6"
783 #define STR_7 "7"
784 #define STR_8 "8"
785 #define STR_9 "9"
786 #define STR_COLON ":"
787 #define STR_SEMICOLON ";"
788 #define STR_LESS_THAN_SIGN "<"
789 #define STR_EQUALS_SIGN "="
790 #define STR_GREATER_THAN_SIGN ">"
791 #define STR_QUESTION_MARK "?"
792 #define STR_COMMERCIAL_AT "@"
793 #define STR_A "A"
794 #define STR_B "B"
795 #define STR_C "C"
796 #define STR_D "D"
797 #define STR_E "E"
798 #define STR_F "F"
799 #define STR_G "G"
800 #define STR_H "H"
801 #define STR_I "I"
802 #define STR_J "J"
803 #define STR_K "K"
804 #define STR_L "L"
805 #define STR_M "M"
806 #define STR_N "N"
807 #define STR_O "O"
808 #define STR_P "P"
809 #define STR_Q "Q"
810 #define STR_R "R"
811 #define STR_S "S"
812 #define STR_T "T"
813 #define STR_U "U"
814 #define STR_V "V"
815 #define STR_W "W"
816 #define STR_X "X"
817 #define STR_Y "Y"
818 #define STR_Z "Z"
819 #define STR_LEFT_SQUARE_BRACKET "["
820 #define STR_BACKSLASH "\\"
821 #define STR_RIGHT_SQUARE_BRACKET "]"
822 #define STR_CIRCUMFLEX_ACCENT "^"
823 #define STR_UNDERSCORE "_"
824 #define STR_GRAVE_ACCENT "`"
825 #define STR_a "a"
826 #define STR_b "b"
827 #define STR_c "c"
828 #define STR_d "d"
829 #define STR_e "e"
830 #define STR_f "f"
831 #define STR_g "g"
832 #define STR_h "h"
833 #define STR_i "i"
834 #define STR_j "j"
835 #define STR_k "k"
836 #define STR_l "l"
837 #define STR_m "m"
838 #define STR_n "n"
839 #define STR_o "o"
840 #define STR_p "p"
841 #define STR_q "q"
842 #define STR_r "r"
843 #define STR_s "s"
844 #define STR_t "t"
845 #define STR_u "u"
846 #define STR_v "v"
847 #define STR_w "w"
848 #define STR_x "x"
849 #define STR_y "y"
850 #define STR_z "z"
851 #define STR_LEFT_CURLY_BRACKET "{"
852 #define STR_VERTICAL_LINE "|"
853 #define STR_RIGHT_CURLY_BRACKET "}"
854 #define STR_TILDE "~"
855
856 #define STRING_ACCEPT0 "ACCEPT\0"
857 #define STRING_COMMIT0 "COMMIT\0"
858 #define STRING_F0 "F\0"
859 #define STRING_FAIL0 "FAIL\0"
860 #define STRING_PRUNE0 "PRUNE\0"
861 #define STRING_SKIP0 "SKIP\0"
862 #define STRING_THEN "THEN"
863
864 #define STRING_alpha0 "alpha\0"
865 #define STRING_lower0 "lower\0"
866 #define STRING_upper0 "upper\0"
867 #define STRING_alnum0 "alnum\0"
868 #define STRING_ascii0 "ascii\0"
869 #define STRING_blank0 "blank\0"
870 #define STRING_cntrl0 "cntrl\0"
871 #define STRING_digit0 "digit\0"
872 #define STRING_graph0 "graph\0"
873 #define STRING_print0 "print\0"
874 #define STRING_punct0 "punct\0"
875 #define STRING_space0 "space\0"
876 #define STRING_word0 "word\0"
877 #define STRING_xdigit "xdigit"
878
879 #define STRING_DEFINE "DEFINE"
880
881 #define STRING_CR_RIGHTPAR "CR)"
882 #define STRING_LF_RIGHTPAR "LF)"
883 #define STRING_CRLF_RIGHTPAR "CRLF)"
884 #define STRING_ANY_RIGHTPAR "ANY)"
885 #define STRING_ANYCRLF_RIGHTPAR "ANYCRLF)"
886 #define STRING_BSR_ANYCRLF_RIGHTPAR "BSR_ANYCRLF)"
887 #define STRING_BSR_UNICODE_RIGHTPAR "BSR_UNICODE)"
888 #define STRING_UTF8_RIGHTPAR "UTF8)"
889
890 #else /* SUPPORT_UTF8 */
891
892 /* UTF-8 support is enabled; always use UTF-8 (=ASCII) character codes. This
893 works in both modes non-EBCDIC platforms, and on EBCDIC platforms in UTF-8 mode
894 only. */
895
896 #define CHAR_HT '\011'
897 #define CHAR_VT '\013'
898 #define CHAR_FF '\014'
899 #define CHAR_CR '\015'
900 #define CHAR_NL '\012'
901 #define CHAR_BS '\010'
902 #define CHAR_BEL '\007'
903 #define CHAR_ESC '\033'
904 #define CHAR_DEL '\177'
905
906 #define CHAR_SPACE '\040'
907 #define CHAR_EXCLAMATION_MARK '\041'
908 #define CHAR_QUOTATION_MARK '\042'
909 #define CHAR_NUMBER_SIGN '\043'
910 #define CHAR_DOLLAR_SIGN '\044'
911 #define CHAR_PERCENT_SIGN '\045'
912 #define CHAR_AMPERSAND '\046'
913 #define CHAR_APOSTROPHE '\047'
914 #define CHAR_LEFT_PARENTHESIS '\050'
915 #define CHAR_RIGHT_PARENTHESIS '\051'
916 #define CHAR_ASTERISK '\052'
917 #define CHAR_PLUS '\053'
918 #define CHAR_COMMA '\054'
919 #define CHAR_MINUS '\055'
920 #define CHAR_DOT '\056'
921 #define CHAR_SLASH '\057'
922 #define CHAR_0 '\060'
923 #define CHAR_1 '\061'
924 #define CHAR_2 '\062'
925 #define CHAR_3 '\063'
926 #define CHAR_4 '\064'
927 #define CHAR_5 '\065'
928 #define CHAR_6 '\066'
929 #define CHAR_7 '\067'
930 #define CHAR_8 '\070'
931 #define CHAR_9 '\071'
932 #define CHAR_COLON '\072'
933 #define CHAR_SEMICOLON '\073'
934 #define CHAR_LESS_THAN_SIGN '\074'
935 #define CHAR_EQUALS_SIGN '\075'
936 #define CHAR_GREATER_THAN_SIGN '\076'
937 #define CHAR_QUESTION_MARK '\077'
938 #define CHAR_COMMERCIAL_AT '\100'
939 #define CHAR_A '\101'
940 #define CHAR_B '\102'
941 #define CHAR_C '\103'
942 #define CHAR_D '\104'
943 #define CHAR_E '\105'
944 #define CHAR_F '\106'
945 #define CHAR_G '\107'
946 #define CHAR_H '\110'
947 #define CHAR_I '\111'
948 #define CHAR_J '\112'
949 #define CHAR_K '\113'
950 #define CHAR_L '\114'
951 #define CHAR_M '\115'
952 #define CHAR_N '\116'
953 #define CHAR_O '\117'
954 #define CHAR_P '\120'
955 #define CHAR_Q '\121'
956 #define CHAR_R '\122'
957 #define CHAR_S '\123'
958 #define CHAR_T '\124'
959 #define CHAR_U '\125'
960 #define CHAR_V '\126'
961 #define CHAR_W '\127'
962 #define CHAR_X '\130'
963 #define CHAR_Y '\131'
964 #define CHAR_Z '\132'
965 #define CHAR_LEFT_SQUARE_BRACKET '\133'
966 #define CHAR_BACKSLASH '\134'
967 #define CHAR_RIGHT_SQUARE_BRACKET '\135'
968 #define CHAR_CIRCUMFLEX_ACCENT '\136'
969 #define CHAR_UNDERSCORE '\137'
970 #define CHAR_GRAVE_ACCENT '\140'
971 #define CHAR_a '\141'
972 #define CHAR_b '\142'
973 #define CHAR_c '\143'
974 #define CHAR_d '\144'
975 #define CHAR_e '\145'
976 #define CHAR_f '\146'
977 #define CHAR_g '\147'
978 #define CHAR_h '\150'
979 #define CHAR_i '\151'
980 #define CHAR_j '\152'
981 #define CHAR_k '\153'
982 #define CHAR_l '\154'
983 #define CHAR_m '\155'
984 #define CHAR_n '\156'
985 #define CHAR_o '\157'
986 #define CHAR_p '\160'
987 #define CHAR_q '\161'
988 #define CHAR_r '\162'
989 #define CHAR_s '\163'
990 #define CHAR_t '\164'
991 #define CHAR_u '\165'
992 #define CHAR_v '\166'
993 #define CHAR_w '\167'
994 #define CHAR_x '\170'
995 #define CHAR_y '\171'
996 #define CHAR_z '\172'
997 #define CHAR_LEFT_CURLY_BRACKET '\173'
998 #define CHAR_VERTICAL_LINE '\174'
999 #define CHAR_RIGHT_CURLY_BRACKET '\175'
1000 #define CHAR_TILDE '\176'
1001
1002 #define STR_HT "\011"
1003 #define STR_VT "\013"
1004 #define STR_FF "\014"
1005 #define STR_CR "\015"
1006 #define STR_NL "\012"
1007 #define STR_BS "\010"
1008 #define STR_BEL "\007"
1009 #define STR_ESC "\033"
1010 #define STR_DEL "\177"
1011
1012 #define STR_SPACE "\040"
1013 #define STR_EXCLAMATION_MARK "\041"
1014 #define STR_QUOTATION_MARK "\042"
1015 #define STR_NUMBER_SIGN "\043"
1016 #define STR_DOLLAR_SIGN "\044"
1017 #define STR_PERCENT_SIGN "\045"
1018 #define STR_AMPERSAND "\046"
1019 #define STR_APOSTROPHE "\047"
1020 #define STR_LEFT_PARENTHESIS "\050"
1021 #define STR_RIGHT_PARENTHESIS "\051"
1022 #define STR_ASTERISK "\052"
1023 #define STR_PLUS "\053"
1024 #define STR_COMMA "\054"
1025 #define STR_MINUS "\055"
1026 #define STR_DOT "\056"
1027 #define STR_SLASH "\057"
1028 #define STR_0 "\060"
1029 #define STR_1 "\061"
1030 #define STR_2 "\062"
1031 #define STR_3 "\063"
1032 #define STR_4 "\064"
1033 #define STR_5 "\065"
1034 #define STR_6 "\066"
1035 #define STR_7 "\067"
1036 #define STR_8 "\070"
1037 #define STR_9 "\071"
1038 #define STR_COLON "\072"
1039 #define STR_SEMICOLON "\073"
1040 #define STR_LESS_THAN_SIGN "\074"
1041 #define STR_EQUALS_SIGN "\075"
1042 #define STR_GREATER_THAN_SIGN "\076"
1043 #define STR_QUESTION_MARK "\077"
1044 #define STR_COMMERCIAL_AT "\100"
1045 #define STR_A "\101"
1046 #define STR_B "\102"
1047 #define STR_C "\103"
1048 #define STR_D "\104"
1049 #define STR_E "\105"
1050 #define STR_F "\106"
1051 #define STR_G "\107"
1052 #define STR_H "\110"
1053 #define STR_I "\111"
1054 #define STR_J "\112"
1055 #define STR_K "\113"
1056 #define STR_L "\114"
1057 #define STR_M "\115"
1058 #define STR_N "\116"
1059 #define STR_O "\117"
1060 #define STR_P "\120"
1061 #define STR_Q "\121"
1062 #define STR_R "\122"
1063 #define STR_S "\123"
1064 #define STR_T "\124"
1065 #define STR_U "\125"
1066 #define STR_V "\126"
1067 #define STR_W "\127"
1068 #define STR_X "\130"
1069 #define STR_Y "\131"
1070 #define STR_Z "\132"
1071 #define STR_LEFT_SQUARE_BRACKET "\133"
1072 #define STR_BACKSLASH "\134"
1073 #define STR_RIGHT_SQUARE_BRACKET "\135"
1074 #define STR_CIRCUMFLEX_ACCENT "\136"
1075 #define STR_UNDERSCORE "\137"
1076 #define STR_GRAVE_ACCENT "\140"
1077 #define STR_a "\141"
1078 #define STR_b "\142"
1079 #define STR_c "\143"
1080 #define STR_d "\144"
1081 #define STR_e "\145"
1082 #define STR_f "\146"
1083 #define STR_g "\147"
1084 #define STR_h "\150"
1085 #define STR_i "\151"
1086 #define STR_j "\152"
1087 #define STR_k "\153"
1088 #define STR_l "\154"
1089 #define STR_m "\155"
1090 #define STR_n "\156"
1091 #define STR_o "\157"
1092 #define STR_p "\160"
1093 #define STR_q "\161"
1094 #define STR_r "\162"
1095 #define STR_s "\163"
1096 #define STR_t "\164"
1097 #define STR_u "\165"
1098 #define STR_v "\166"
1099 #define STR_w "\167"
1100 #define STR_x "\170"
1101 #define STR_y "\171"
1102 #define STR_z "\172"
1103 #define STR_LEFT_CURLY_BRACKET "\173"
1104 #define STR_VERTICAL_LINE "\174"
1105 #define STR_RIGHT_CURLY_BRACKET "\175"
1106 #define STR_TILDE "\176"
1107
1108 #define STRING_ACCEPT0 STR_A STR_C STR_C STR_E STR_P STR_T "\0"
1109 #define STRING_COMMIT0 STR_C STR_O STR_M STR_M STR_I STR_T "\0"
1110 #define STRING_F0 STR_F "\0"
1111 #define STRING_FAIL0 STR_F STR_A STR_I STR_L "\0"
1112 #define STRING_PRUNE0 STR_P STR_R STR_U STR_N STR_E "\0"
1113 #define STRING_SKIP0 STR_S STR_K STR_I STR_P "\0"
1114 #define STRING_THEN STR_T STR_H STR_E STR_N
1115
1116 #define STRING_alpha0 STR_a STR_l STR_p STR_h STR_a "\0"
1117 #define STRING_lower0 STR_l STR_o STR_w STR_e STR_r "\0"
1118 #define STRING_upper0 STR_u STR_p STR_p STR_e STR_r "\0"
1119 #define STRING_alnum0 STR_a STR_l STR_n STR_u STR_m "\0"
1120 #define STRING_ascii0 STR_a STR_s STR_c STR_i STR_i "\0"
1121 #define STRING_blank0 STR_b STR_l STR_a STR_n STR_k "\0"
1122 #define STRING_cntrl0 STR_c STR_n STR_t STR_r STR_l "\0"
1123 #define STRING_digit0 STR_d STR_i STR_g STR_i STR_t "\0"
1124 #define STRING_graph0 STR_g STR_r STR_a STR_p STR_h "\0"
1125 #define STRING_print0 STR_p STR_r STR_i STR_n STR_t "\0"
1126 #define STRING_punct0 STR_p STR_u STR_n STR_c STR_t "\0"
1127 #define STRING_space0 STR_s STR_p STR_a STR_c STR_e "\0"
1128 #define STRING_word0 STR_w STR_o STR_r STR_d "\0"
1129 #define STRING_xdigit STR_x STR_d STR_i STR_g STR_i STR_t
1130
1131 #define STRING_DEFINE STR_D STR_E STR_F STR_I STR_N STR_E
1132
1133 #define STRING_CR_RIGHTPAR STR_C STR_R STR_RIGHT_PARENTHESIS
1134 #define STRING_LF_RIGHTPAR STR_L STR_F STR_RIGHT_PARENTHESIS
1135 #define STRING_CRLF_RIGHTPAR STR_C STR_R STR_L STR_F STR_RIGHT_PARENTHESIS
1136 #define STRING_ANY_RIGHTPAR STR_A STR_N STR_Y STR_RIGHT_PARENTHESIS
1137 #define STRING_ANYCRLF_RIGHTPAR STR_A STR_N STR_Y STR_C STR_R STR_L STR_F STR_RIGHT_PARENTHESIS
1138 #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
1139 #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
1140 #define STRING_UTF8_RIGHTPAR STR_U STR_T STR_F STR_8 STR_RIGHT_PARENTHESIS
1141
1142 #endif /* SUPPORT_UTF8 */
1143
1144 /* Escape items that are just an encoding of a particular data value. */
1145
1146 #ifndef ESC_e
1147 #define ESC_e CHAR_ESC
1148 #endif
1149
1150 #ifndef ESC_f
1151 #define ESC_f CHAR_FF
1152 #endif
1153
1154 #ifndef ESC_n
1155 #define ESC_n CHAR_NL
1156 #endif
1157
1158 #ifndef ESC_r
1159 #define ESC_r CHAR_CR
1160 #endif
1161
1162 /* We can't officially use ESC_t because it is a POSIX reserved identifier
1163 (presumably because of all the others like size_t). */
1164
1165 #ifndef ESC_tee
1166 #define ESC_tee CHAR_HT
1167 #endif
1168
1169 /* Codes for different types of Unicode property */
1170
1171 #define PT_ANY 0 /* Any property - matches all chars */
1172 #define PT_LAMP 1 /* L& - the union of Lu, Ll, Lt */
1173 #define PT_GC 2 /* General characteristic (e.g. L) */
1174 #define PT_PC 3 /* Particular characteristic (e.g. Lu) */
1175 #define PT_SC 4 /* Script (e.g. Han) */
1176
1177 /* Flag bits and data types for the extended class (OP_XCLASS) for classes that
1178 contain UTF-8 characters with values greater than 255. */
1179
1180 #define XCL_NOT 0x01 /* Flag: this is a negative class */
1181 #define XCL_MAP 0x02 /* Flag: a 32-byte map is present */
1182
1183 #define XCL_END 0 /* Marks end of individual items */
1184 #define XCL_SINGLE 1 /* Single item (one multibyte char) follows */
1185 #define XCL_RANGE 2 /* A range (two multibyte chars) follows */
1186 #define XCL_PROP 3 /* Unicode property (2-byte property code follows) */
1187 #define XCL_NOTPROP 4 /* Unicode inverted property (ditto) */
1188
1189 /* These are escaped items that aren't just an encoding of a particular data
1190 value such as \n. They must have non-zero values, as check_escape() returns
1191 their negation. Also, they must appear in the same order as in the opcode
1192 definitions below, up to ESC_z. There's a dummy for OP_ANY because it
1193 corresponds to "." rather than an escape sequence, and another for OP_ALLANY
1194 (which is used for [^] in JavaScript compatibility mode).
1195
1196 The final escape must be ESC_REF as subsequent values are used for
1197 backreferences (\1, \2, \3, etc). There are two tests in the code for an escape
1198 greater than ESC_b and less than ESC_Z to detect the types that may be
1199 repeated. These are the types that consume characters. If any new escapes are
1200 put in between that don't consume a character, that code will have to change.
1201 */
1202
1203 enum { ESC_A = 1, ESC_G, ESC_K, ESC_B, ESC_b, ESC_D, ESC_d, ESC_S, ESC_s,
1204 ESC_W, ESC_w, ESC_dum1, ESC_dum2, ESC_C, ESC_P, ESC_p, ESC_R, ESC_H,
1205 ESC_h, ESC_V, ESC_v, ESC_X, ESC_Z, ESC_z, ESC_E, ESC_Q, ESC_g, ESC_k,
1206 ESC_REF };
1207
1208
1209 /* Opcode table: Starting from 1 (i.e. after OP_END), the values up to
1210 OP_EOD must correspond in order to the list of escapes immediately above.
1211
1212 *** NOTE NOTE NOTE *** Whenever this list is updated, the two macro definitions
1213 that follow must also be updated to match. There are also tables called
1214 "coptable" and "poptable" in pcre_dfa_exec.c that must be updated. */
1215
1216 enum {
1217 OP_END, /* 0 End of pattern */
1218
1219 /* Values corresponding to backslashed metacharacters */
1220
1221 OP_SOD, /* 1 Start of data: \A */
1222 OP_SOM, /* 2 Start of match (subject + offset): \G */
1223 OP_SET_SOM, /* 3 Set start of match (\K) */
1224 OP_NOT_WORD_BOUNDARY, /* 4 \B */
1225 OP_WORD_BOUNDARY, /* 5 \b */
1226 OP_NOT_DIGIT, /* 6 \D */
1227 OP_DIGIT, /* 7 \d */
1228 OP_NOT_WHITESPACE, /* 8 \S */
1229 OP_WHITESPACE, /* 9 \s */
1230 OP_NOT_WORDCHAR, /* 10 \W */
1231 OP_WORDCHAR, /* 11 \w */
1232 OP_ANY, /* 12 Match any character (subject to DOTALL) */
1233 OP_ALLANY, /* 13 Match any character (not subject to DOTALL) */
1234 OP_ANYBYTE, /* 14 Match any byte (\C); different to OP_ANY for UTF-8 */
1235 OP_NOTPROP, /* 15 \P (not Unicode property) */
1236 OP_PROP, /* 16 \p (Unicode property) */
1237 OP_ANYNL, /* 17 \R (any newline sequence) */
1238 OP_NOT_HSPACE, /* 18 \H (not horizontal whitespace) */
1239 OP_HSPACE, /* 19 \h (horizontal whitespace) */
1240 OP_NOT_VSPACE, /* 20 \V (not vertical whitespace) */
1241 OP_VSPACE, /* 21 \v (vertical whitespace) */
1242 OP_EXTUNI, /* 22 \X (extended Unicode sequence */
1243 OP_EODN, /* 23 End of data or \n at end of data: \Z. */
1244 OP_EOD, /* 24 End of data: \z */
1245
1246 OP_OPT, /* 25 Set runtime options */
1247 OP_CIRC, /* 26 Start of line - varies with multiline switch */
1248 OP_DOLL, /* 27 End of line - varies with multiline switch */
1249 OP_CHAR, /* 28 Match one character, casefully */
1250 OP_CHARNC, /* 29 Match one character, caselessly */
1251 OP_NOT, /* 30 Match one character, not the following one */
1252
1253 OP_STAR, /* 31 The maximizing and minimizing versions of */
1254 OP_MINSTAR, /* 32 these six opcodes must come in pairs, with */
1255 OP_PLUS, /* 33 the minimizing one second. */
1256 OP_MINPLUS, /* 34 This first set applies to single characters.*/
1257 OP_QUERY, /* 35 */
1258 OP_MINQUERY, /* 36 */
1259
1260 OP_UPTO, /* 37 From 0 to n matches */
1261 OP_MINUPTO, /* 38 */
1262 OP_EXACT, /* 39 Exactly n matches */
1263
1264 OP_POSSTAR, /* 40 Possessified star */
1265 OP_POSPLUS, /* 41 Possessified plus */
1266 OP_POSQUERY, /* 42 Posesssified query */
1267 OP_POSUPTO, /* 43 Possessified upto */
1268
1269 OP_NOTSTAR, /* 44 The maximizing and minimizing versions of */
1270 OP_NOTMINSTAR, /* 45 these six opcodes must come in pairs, with */
1271 OP_NOTPLUS, /* 46 the minimizing one second. They must be in */
1272 OP_NOTMINPLUS, /* 47 exactly the same order as those above. */
1273 OP_NOTQUERY, /* 48 This set applies to "not" single characters. */
1274 OP_NOTMINQUERY, /* 49 */
1275
1276 OP_NOTUPTO, /* 50 From 0 to n matches */
1277 OP_NOTMINUPTO, /* 51 */
1278 OP_NOTEXACT, /* 52 Exactly n matches */
1279
1280 OP_NOTPOSSTAR, /* 53 Possessified versions */
1281 OP_NOTPOSPLUS, /* 54 */
1282 OP_NOTPOSQUERY, /* 55 */
1283 OP_NOTPOSUPTO, /* 56 */
1284
1285 OP_TYPESTAR, /* 57 The maximizing and minimizing versions of */
1286 OP_TYPEMINSTAR, /* 58 these six opcodes must come in pairs, with */
1287 OP_TYPEPLUS, /* 59 the minimizing one second. These codes must */
1288 OP_TYPEMINPLUS, /* 60 be in exactly the same order as those above. */
1289 OP_TYPEQUERY, /* 61 This set applies to character types such as \d */
1290 OP_TYPEMINQUERY, /* 62 */
1291
1292 OP_TYPEUPTO, /* 63 From 0 to n matches */
1293 OP_TYPEMINUPTO, /* 64 */
1294 OP_TYPEEXACT, /* 65 Exactly n matches */
1295
1296 OP_TYPEPOSSTAR, /* 66 Possessified versions */
1297 OP_TYPEPOSPLUS, /* 67 */
1298 OP_TYPEPOSQUERY, /* 68 */
1299 OP_TYPEPOSUPTO, /* 69 */
1300
1301 OP_CRSTAR, /* 70 The maximizing and minimizing versions of */
1302 OP_CRMINSTAR, /* 71 all these opcodes must come in pairs, with */
1303 OP_CRPLUS, /* 72 the minimizing one second. These codes must */
1304 OP_CRMINPLUS, /* 73 be in exactly the same order as those above. */
1305 OP_CRQUERY, /* 74 These are for character classes and back refs */
1306 OP_CRMINQUERY, /* 75 */
1307 OP_CRRANGE, /* 76 These are different to the three sets above. */
1308 OP_CRMINRANGE, /* 77 */
1309
1310 OP_CLASS, /* 78 Match a character class, chars < 256 only */
1311 OP_NCLASS, /* 79 Same, but the bitmap was created from a negative
1312 class - the difference is relevant only when a UTF-8
1313 character > 255 is encountered. */
1314
1315 OP_XCLASS, /* 80 Extended class for handling UTF-8 chars within the
1316 class. This does both positive and negative. */
1317
1318 OP_REF, /* 81 Match a back reference */
1319 OP_RECURSE, /* 82 Match a numbered subpattern (possibly recursive) */
1320 OP_CALLOUT, /* 83 Call out to external function if provided */
1321
1322 OP_ALT, /* 84 Start of alternation */
1323 OP_KET, /* 85 End of group that doesn't have an unbounded repeat */
1324 OP_KETRMAX, /* 86 These two must remain together and in this */
1325 OP_KETRMIN, /* 87 order. They are for groups the repeat for ever. */
1326
1327 /* The assertions must come before BRA, CBRA, ONCE, and COND.*/
1328
1329 OP_ASSERT, /* 88 Positive lookahead */
1330 OP_ASSERT_NOT, /* 89 Negative lookahead */
1331 OP_ASSERTBACK, /* 90 Positive lookbehind */
1332 OP_ASSERTBACK_NOT, /* 91 Negative lookbehind */
1333 OP_REVERSE, /* 92 Move pointer back - used in lookbehind assertions */
1334
1335 /* ONCE, BRA, CBRA, and COND must come after the assertions, with ONCE first,
1336 as there's a test for >= ONCE for a subpattern that isn't an assertion. */
1337
1338 OP_ONCE, /* 93 Atomic group */
1339 OP_BRA, /* 94 Start of non-capturing bracket */
1340 OP_CBRA, /* 95 Start of capturing bracket */
1341 OP_COND, /* 96 Conditional group */
1342
1343 /* These three must follow the previous three, in the same order. There's a
1344 check for >= SBRA to distinguish the two sets. */
1345
1346 OP_SBRA, /* 97 Start of non-capturing bracket, check empty */
1347 OP_SCBRA, /* 98 Start of capturing bracket, check empty */
1348 OP_SCOND, /* 99 Conditional group, check empty */
1349
1350 /* The next two pairs must (respectively) be kept together. */
1351
1352 OP_CREF, /* 100 Used to hold a capture number as condition */
1353 OP_NCREF, /* 101 Same, but generaged by a name reference*/
1354 OP_RREF, /* 102 Used to hold a recursion number as condition */
1355 OP_NRREF, /* 103 Same, but generaged by a name reference*/
1356 OP_DEF, /* 104 The DEFINE condition */
1357
1358 OP_BRAZERO, /* 105 These two must remain together and in this */
1359 OP_BRAMINZERO, /* 106 order. */
1360
1361 /* These are backtracking control verbs */
1362
1363 OP_PRUNE, /* 107 */
1364 OP_SKIP, /* 108 */
1365 OP_THEN, /* 109 */
1366 OP_COMMIT, /* 110 */
1367
1368 /* These are forced failure and success verbs */
1369
1370 OP_FAIL, /* 111 */
1371 OP_ACCEPT, /* 112 */
1372 OP_CLOSE, /* 113 Used before OP_ACCEPT to close open captures */
1373
1374 /* This is used to skip a subpattern with a {0} quantifier */
1375
1376 OP_SKIPZERO /* 114 */
1377 };
1378
1379 /* *** NOTE NOTE NOTE *** Whenever the list above is updated, the two macro
1380 definitions that follow must also be updated to match. There are also tables
1381 called "coptable" cna "poptable" in pcre_dfa_exec.c that must be updated. */
1382
1383
1384 /* This macro defines textual names for all the opcodes. These are used only
1385 for debugging. The macro is referenced only in pcre_printint.c. */
1386
1387 #define OP_NAME_LIST \
1388 "End", "\\A", "\\G", "\\K", "\\B", "\\b", "\\D", "\\d", \
1389 "\\S", "\\s", "\\W", "\\w", "Any", "AllAny", "Anybyte", \
1390 "notprop", "prop", "\\R", "\\H", "\\h", "\\V", "\\v", \
1391 "extuni", "\\Z", "\\z", \
1392 "Opt", "^", "$", "char", "charnc", "not", \
1393 "*", "*?", "+", "+?", "?", "??", "{", "{", "{", \
1394 "*+","++", "?+", "{", \
1395 "*", "*?", "+", "+?", "?", "??", "{", "{", "{", \
1396 "*+","++", "?+", "{", \
1397 "*", "*?", "+", "+?", "?", "??", "{", "{", "{", \
1398 "*+","++", "?+", "{", \
1399 "*", "*?", "+", "+?", "?", "??", "{", "{", \
1400 "class", "nclass", "xclass", "Ref", "Recurse", "Callout", \
1401 "Alt", "Ket", "KetRmax", "KetRmin", "Assert", "Assert not", \
1402 "AssertB", "AssertB not", "Reverse", \
1403 "Once", "Bra", "CBra", "Cond", "SBra", "SCBra", "SCond", \
1404 "Cond ref", "Cond nref", "Cond rec", "Cond nrec", "Cond def", \
1405 "Brazero", "Braminzero", \
1406 "*PRUNE", "*SKIP", "*THEN", "*COMMIT", "*FAIL", "*ACCEPT", \
1407 "Close", "Skip zero"
1408
1409
1410 /* This macro defines the length of fixed length operations in the compiled
1411 regex. The lengths are used when searching for specific things, and also in the
1412 debugging printing of a compiled regex. We use a macro so that it can be
1413 defined close to the definitions of the opcodes themselves.
1414
1415 As things have been extended, some of these are no longer fixed lenths, but are
1416 minima instead. For example, the length of a single-character repeat may vary
1417 in UTF-8 mode. The code that uses this table must know about such things. */
1418
1419 #define OP_LENGTHS \
1420 1, /* End */ \
1421 1, 1, 1, 1, 1, /* \A, \G, \K, \B, \b */ \
1422 1, 1, 1, 1, 1, 1, /* \D, \d, \S, \s, \W, \w */ \
1423 1, 1, 1, /* Any, AllAny, Anybyte */ \
1424 3, 3, 1, /* NOTPROP, PROP, EXTUNI */ \
1425 1, 1, 1, 1, 1, /* \R, \H, \h, \V, \v */ \
1426 1, 1, 2, 1, 1, /* \Z, \z, Opt, ^, $ */ \
1427 2, /* Char - the minimum length */ \
1428 2, /* Charnc - the minimum length */ \
1429 2, /* not */ \
1430 /* Positive single-char repeats ** These are */ \
1431 2, 2, 2, 2, 2, 2, /* *, *?, +, +?, ?, ?? ** minima in */ \
1432 4, 4, 4, /* upto, minupto, exact ** UTF-8 mode */ \
1433 2, 2, 2, 4, /* *+, ++, ?+, upto+ */ \
1434 /* Negative single-char repeats - only for chars < 256 */ \
1435 2, 2, 2, 2, 2, 2, /* NOT *, *?, +, +?, ?, ?? */ \
1436 4, 4, 4, /* NOT upto, minupto, exact */ \
1437 2, 2, 2, 4, /* Possessive *, +, ?, upto */ \
1438 /* Positive type repeats */ \
1439 2, 2, 2, 2, 2, 2, /* Type *, *?, +, +?, ?, ?? */ \
1440 4, 4, 4, /* Type upto, minupto, exact */ \
1441 2, 2, 2, 4, /* Possessive *+, ++, ?+, upto+ */ \
1442 /* Character class & ref repeats */ \
1443 1, 1, 1, 1, 1, 1, /* *, *?, +, +?, ?, ?? */ \
1444 5, 5, /* CRRANGE, CRMINRANGE */ \
1445 33, /* CLASS */ \
1446 33, /* NCLASS */ \
1447 0, /* XCLASS - variable length */ \
1448 3, /* REF */ \
1449 1+LINK_SIZE, /* RECURSE */ \
1450 2+2*LINK_SIZE, /* CALLOUT */ \
1451 1+LINK_SIZE, /* Alt */ \
1452 1+LINK_SIZE, /* Ket */ \
1453 1+LINK_SIZE, /* KetRmax */ \
1454 1+LINK_SIZE, /* KetRmin */ \
1455 1+LINK_SIZE, /* Assert */ \
1456 1+LINK_SIZE, /* Assert not */ \
1457 1+LINK_SIZE, /* Assert behind */ \
1458 1+LINK_SIZE, /* Assert behind not */ \
1459 1+LINK_SIZE, /* Reverse */ \
1460 1+LINK_SIZE, /* ONCE */ \
1461 1+LINK_SIZE, /* BRA */ \
1462 3+LINK_SIZE, /* CBRA */ \
1463 1+LINK_SIZE, /* COND */ \
1464 1+LINK_SIZE, /* SBRA */ \
1465 3+LINK_SIZE, /* SCBRA */ \
1466 1+LINK_SIZE, /* SCOND */ \
1467 3, 3, /* CREF, NCREF */ \
1468 3, 3, /* RREF, NRREF */ \
1469 1, /* DEF */ \
1470 1, 1, /* BRAZERO, BRAMINZERO */ \
1471 1, 1, 1, 1, /* PRUNE, SKIP, THEN, COMMIT, */ \
1472 1, 1, 3, 1 /* FAIL, ACCEPT, CLOSE, SKIPZERO */
1473
1474
1475 /* A magic value for OP_RREF and OP_NRREF to indicate the "any recursion"
1476 condition. */
1477
1478 #define RREF_ANY 0xffff
1479
1480 /* Error code numbers. They are given names so that they can more easily be
1481 tracked. */
1482
1483 enum { ERR0, ERR1, ERR2, ERR3, ERR4, ERR5, ERR6, ERR7, ERR8, ERR9,
1484 ERR10, ERR11, ERR12, ERR13, ERR14, ERR15, ERR16, ERR17, ERR18, ERR19,
1485 ERR20, ERR21, ERR22, ERR23, ERR24, ERR25, ERR26, ERR27, ERR28, ERR29,
1486 ERR30, ERR31, ERR32, ERR33, ERR34, ERR35, ERR36, ERR37, ERR38, ERR39,
1487 ERR40, ERR41, ERR42, ERR43, ERR44, ERR45, ERR46, ERR47, ERR48, ERR49,
1488 ERR50, ERR51, ERR52, ERR53, ERR54, ERR55, ERR56, ERR57, ERR58, ERR59,
1489 ERR60, ERR61, ERR62, ERR63, ERR64, ERR65 };
1490
1491 /* The real format of the start of the pcre block; the index of names and the
1492 code vector run on as long as necessary after the end. We store an explicit
1493 offset to the name table so that if a regex is compiled on one host, saved, and
1494 then run on another where the size of pointers is different, all might still
1495 be well. For the case of compiled-on-4 and run-on-8, we include an extra
1496 pointer that is always NULL. For future-proofing, a few dummy fields were
1497 originally included - even though you can never get this planning right - but
1498 there is only one left now.
1499
1500 NOTE NOTE NOTE:
1501 Because people can now save and re-use compiled patterns, any additions to this
1502 structure should be made at the end, and something earlier (e.g. a new
1503 flag in the options or one of the dummy fields) should indicate that the new
1504 fields are present. Currently PCRE always sets the dummy fields to zero.
1505 NOTE NOTE NOTE
1506 */
1507
1508 typedef struct real_pcre {
1509 pcre_uint32 magic_number;
1510 pcre_uint32 size; /* Total that was malloced */
1511 pcre_uint32 options; /* Public options */
1512 pcre_uint16 flags; /* Private flags */
1513 pcre_uint16 dummy1; /* For future use */
1514 pcre_uint16 top_bracket;
1515 pcre_uint16 top_backref;
1516 pcre_uint16 first_byte;
1517 pcre_uint16 req_byte;
1518 pcre_uint16 name_table_offset; /* Offset to name table that follows */
1519 pcre_uint16 name_entry_size; /* Size of any name items */
1520 pcre_uint16 name_count; /* Number of name items */
1521 pcre_uint16 ref_count; /* Reference count */
1522
1523 const unsigned char *tables; /* Pointer to tables or NULL for std */
1524 const unsigned char *nullpad; /* NULL padding */
1525 } real_pcre;
1526
1527 /* The format of the block used to store data from pcre_study(). The same
1528 remark (see NOTE above) about extending this structure applies. */
1529
1530 typedef struct pcre_study_data {
1531 pcre_uint32 size; /* Total that was malloced */
1532 pcre_uint32 flags; /* Private flags */
1533 uschar start_bits[32]; /* Starting char bits */
1534 pcre_uint32 minlength; /* Minimum subject length */
1535 } pcre_study_data;
1536
1537 /* Structure for building a chain of open capturing subpatterns during
1538 compiling, so that instructions to close them can be compiled when (*ACCEPT) is
1539 encountered. */
1540
1541 typedef struct open_capitem {
1542 struct open_capitem *next; /* Chain link */
1543 pcre_uint16 number; /* Capture number */
1544 } open_capitem;
1545
1546 /* Structure for passing "static" information around between the functions
1547 doing the compiling, so that they are thread-safe. */
1548
1549 typedef struct compile_data {
1550 const uschar *lcc; /* Points to lower casing table */
1551 const uschar *fcc; /* Points to case-flipping table */
1552 const uschar *cbits; /* Points to character type table */
1553 const uschar *ctypes; /* Points to table of type maps */
1554 const uschar *start_workspace;/* The start of working space */
1555 const uschar *start_code; /* The start of the compiled code */
1556 const uschar *start_pattern; /* The start of the pattern */
1557 const uschar *end_pattern; /* The end of the pattern */
1558 open_capitem *open_caps; /* Chain of open capture items */
1559 uschar *hwm; /* High watermark of workspace */
1560 uschar *name_table; /* The name/number table */
1561 int names_found; /* Number of entries so far */
1562 int name_entry_size; /* Size of each entry */
1563 int bracount; /* Count of capturing parens as we compile */
1564 int final_bracount; /* Saved value after first pass */
1565 int top_backref; /* Maximum back reference */
1566 unsigned int backref_map; /* Bitmap of low back refs */
1567 int external_options; /* External (initial) options */
1568 int external_flags; /* External flag bits to be set */
1569 int req_varyopt; /* "After variable item" flag for reqbyte */
1570 BOOL had_accept; /* (*ACCEPT) encountered */
1571 BOOL check_lookbehind; /* Lookbehinds need later checking */
1572 int nltype; /* Newline type */
1573 int nllen; /* Newline string length */
1574 uschar nl[4]; /* Newline string when fixed length */
1575 } compile_data;
1576
1577 /* Structure for maintaining a chain of pointers to the currently incomplete
1578 branches, for testing for left recursion. */
1579
1580 typedef struct branch_chain {
1581 struct branch_chain *outer;
1582 uschar *current;
1583 } branch_chain;
1584
1585 /* Structure for items in a linked list that represents an explicit recursive
1586 call within the pattern. */
1587
1588 typedef struct recursion_info {
1589 struct recursion_info *prevrec; /* Previous recursion record (or NULL) */
1590 int group_num; /* Number of group that was called */
1591 const uschar *after_call; /* "Return value": points after the call in the expr */
1592 USPTR save_start; /* Old value of mstart */
1593 int *offset_save; /* Pointer to start of saved offsets */
1594 int saved_max; /* Number of saved offsets */
1595 int save_offset_top; /* Current value of offset_top */
1596 } recursion_info;
1597
1598 /* Structure for building a chain of data for holding the values of the subject
1599 pointer at the start of each subpattern, so as to detect when an empty string
1600 has been matched by a subpattern - to break infinite loops. */
1601
1602 typedef struct eptrblock {
1603 struct eptrblock *epb_prev;
1604 USPTR epb_saved_eptr;
1605 } eptrblock;
1606
1607
1608 /* Structure for passing "static" information around between the functions
1609 doing traditional NFA matching, so that they are thread-safe. */
1610
1611 typedef struct match_data {
1612 unsigned long int match_call_count; /* As it says */
1613 unsigned long int match_limit; /* As it says */
1614 unsigned long int match_limit_recursion; /* As it says */
1615 int *offset_vector; /* Offset vector */
1616 int offset_end; /* One past the end */
1617 int offset_max; /* The maximum usable for return data */
1618 int nltype; /* Newline type */
1619 int nllen; /* Newline string length */
1620 int name_count; /* Number of names in name table */
1621 int name_entry_size; /* Size of entry in names table */
1622 uschar *name_table; /* Table of names */
1623 uschar nl[4]; /* Newline string when fixed */
1624 const uschar *lcc; /* Points to lower casing table */
1625 const uschar *ctypes; /* Points to table of type maps */
1626 BOOL offset_overflow; /* Set if too many extractions */
1627 BOOL notbol; /* NOTBOL flag */
1628 BOOL noteol; /* NOTEOL flag */
1629 BOOL utf8; /* UTF8 flag */
1630 BOOL jscript_compat; /* JAVASCRIPT_COMPAT flag */
1631 BOOL endonly; /* Dollar not before final \n */
1632 BOOL notempty; /* Empty string match not wanted */
1633 BOOL notempty_atstart; /* Empty string match at start not wanted */
1634 BOOL hitend; /* Hit the end of the subject at some point */
1635 BOOL bsr_anycrlf; /* \R is just any CRLF, not full Unicode */
1636 const uschar *start_code; /* For use when recursing */
1637 USPTR start_subject; /* Start of the subject string */
1638 USPTR end_subject; /* End of the subject string */
1639 USPTR start_match_ptr; /* Start of matched string */
1640 USPTR end_match_ptr; /* Subject position at end match */
1641 USPTR start_used_ptr; /* Earliest consulted character */
1642 int partial; /* PARTIAL options */
1643 int end_offset_top; /* Highwater mark at end of match */
1644 int capture_last; /* Most recent capture number */
1645 int start_offset; /* The start offset value */
1646 eptrblock *eptrchain; /* Chain of eptrblocks for tail recursions */
1647 int eptrn; /* Next free eptrblock */
1648 recursion_info *recursive; /* Linked list of recursion data */
1649 void *callout_data; /* To pass back to callouts */
1650 } match_data;
1651
1652 /* A similar structure is used for the same purpose by the DFA matching
1653 functions. */
1654
1655 typedef struct dfa_match_data {
1656 const uschar *start_code; /* Start of the compiled pattern */
1657 const uschar *start_subject; /* Start of the subject string */
1658 const uschar *end_subject; /* End of subject string */
1659 const uschar *start_used_ptr; /* Earliest consulted character */
1660 const uschar *tables; /* Character tables */
1661 int start_offset; /* The start offset value */
1662 int moptions; /* Match options */
1663 int poptions; /* Pattern options */
1664 int nltype; /* Newline type */
1665 int nllen; /* Newline string length */
1666 uschar nl[4]; /* Newline string when fixed */
1667 void *callout_data; /* To pass back to callouts */
1668 } dfa_match_data;
1669
1670 /* Bit definitions for entries in the pcre_ctypes table. */
1671
1672 #define ctype_space 0x01
1673 #define ctype_letter 0x02
1674 #define ctype_digit 0x04
1675 #define ctype_xdigit 0x08
1676 #define ctype_word 0x10 /* alphanumeric or '_' */
1677 #define ctype_meta 0x80 /* regexp meta char or zero (end pattern) */
1678
1679 /* Offsets for the bitmap tables in pcre_cbits. Each table contains a set
1680 of bits for a class map. Some classes are built by combining these tables. */
1681
1682 #define cbit_space 0 /* [:space:] or \s */
1683 #define cbit_xdigit 32 /* [:xdigit:] */
1684 #define cbit_digit 64 /* [:digit:] or \d */
1685 #define cbit_upper 96 /* [:upper:] */
1686 #define cbit_lower 128 /* [:lower:] */
1687 #define cbit_word 160 /* [:word:] or \w */
1688 #define cbit_graph 192 /* [:graph:] */
1689 #define cbit_print 224 /* [:print:] */
1690 #define cbit_punct 256 /* [:punct:] */
1691 #define cbit_cntrl 288 /* [:cntrl:] */
1692 #define cbit_length 320 /* Length of the cbits table */
1693
1694 /* Offsets of the various tables from the base tables pointer, and
1695 total length. */
1696
1697 #define lcc_offset 0
1698 #define fcc_offset 256
1699 #define cbits_offset 512
1700 #define ctypes_offset (cbits_offset + cbit_length)
1701 #define tables_length (ctypes_offset + 256)
1702
1703 /* Layout of the UCP type table that translates property names into types and
1704 codes. Each entry used to point directly to a name, but to reduce the number of
1705 relocations in shared libraries, it now has an offset into a single string
1706 instead. */
1707
1708 typedef struct {
1709 pcre_uint16 name_offset;
1710 pcre_uint16 type;
1711 pcre_uint16 value;
1712 } ucp_type_table;
1713
1714
1715 /* Internal shared data tables. These are tables that are used by more than one
1716 of the exported public functions. They have to be "external" in the C sense,
1717 but are not part of the PCRE public API. The data for these tables is in the
1718 pcre_tables.c module. */
1719
1720 extern const int _pcre_utf8_table1[];
1721 extern const int _pcre_utf8_table2[];
1722 extern const int _pcre_utf8_table3[];
1723 extern const uschar _pcre_utf8_table4[];
1724
1725 extern const int _pcre_utf8_table1_size;
1726
1727 extern const char _pcre_utt_names[];
1728 extern const ucp_type_table _pcre_utt[];
1729 extern const int _pcre_utt_size;
1730
1731 extern const uschar _pcre_default_tables[];
1732
1733 extern const uschar _pcre_OP_lengths[];
1734
1735
1736 /* Internal shared functions. These are functions that are used by more than
1737 one of the exported public functions. They have to be "external" in the C
1738 sense, but are not part of the PCRE public API. */
1739
1740 extern const uschar *_pcre_find_bracket(const uschar *, BOOL, int);
1741 extern BOOL _pcre_is_newline(const uschar *, int, const uschar *,
1742 int *, BOOL);
1743 extern int _pcre_ord2utf8(int, uschar *);
1744 extern real_pcre *_pcre_try_flipped(const real_pcre *, real_pcre *,
1745 const pcre_study_data *, pcre_study_data *);
1746 extern int _pcre_valid_utf8(const uschar *, int);
1747 extern BOOL _pcre_was_newline(const uschar *, int, const uschar *,
1748 int *, BOOL);
1749 extern BOOL _pcre_xclass(int, const uschar *);
1750
1751
1752 /* Unicode character database (UCD) */
1753
1754 typedef struct {
1755 uschar script;
1756 uschar chartype;
1757 pcre_int32 other_case;
1758 } ucd_record;
1759
1760 extern const ucd_record _pcre_ucd_records[];
1761 extern const uschar _pcre_ucd_stage1[];
1762 extern const pcre_uint16 _pcre_ucd_stage2[];
1763 extern const int _pcre_ucp_gentype[];
1764
1765
1766 /* UCD access macros */
1767
1768 #define UCD_BLOCK_SIZE 128
1769 #define GET_UCD(ch) (_pcre_ucd_records + \
1770 _pcre_ucd_stage2[_pcre_ucd_stage1[(ch) / UCD_BLOCK_SIZE] * \
1771 UCD_BLOCK_SIZE + ch % UCD_BLOCK_SIZE])
1772
1773 #define UCD_CHARTYPE(ch) GET_UCD(ch)->chartype
1774 #define UCD_SCRIPT(ch) GET_UCD(ch)->script
1775 #define UCD_CATEGORY(ch) _pcre_ucp_gentype[UCD_CHARTYPE(ch)]
1776 #define UCD_OTHERCASE(ch) (ch + GET_UCD(ch)->other_case)
1777
1778 #endif
1779
1780 /* End of pcre_internal.h */

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