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Sun Mar 15 18:24:05 2009 UTC (5 years, 1 month ago) by ph10
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Add PCRE_NO_START_OPTIMIZE

1 nigel 77 /*************************************************
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 ph10 376 Copyright (c) 1997-2009 University of Cambridge
11 nigel 77
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 nigel 85 #ifndef PCRE_INTERNAL_H
46     #define PCRE_INTERNAL_H
47 nigel 77
48     /* Define DEBUG to get debugging output on stdout. */
49    
50 nigel 85 #if 0
51 nigel 77 #define DEBUG
52 nigel 85 #endif
53 nigel 77
54     /* Use a macro for debugging printing, 'cause that eliminates the use of #ifdef
55     inline, and there are *still* stupid compilers about that don't like indented
56     pre-processor statements, or at least there were when I first wrote this. After
57 nigel 93 all, it had only been about 10 years then...
58 nigel 77
59 nigel 93 It turns out that the Mac Debugging.h header also defines the macro DPRINTF, so
60     be absolutely sure we get our version. */
61    
62     #undef DPRINTF
63 nigel 77 #ifdef DEBUG
64     #define DPRINTF(p) printf p
65     #else
66 nigel 93 #define DPRINTF(p) /* Nothing */
67 nigel 77 #endif
68    
69    
70     /* Standard C headers plus the external interface definition. The only time
71     setjmp and stdarg are used is when NO_RECURSE is set. */
72    
73     #include <ctype.h>
74     #include <limits.h>
75     #include <setjmp.h>
76     #include <stdarg.h>
77     #include <stddef.h>
78     #include <stdio.h>
79     #include <stdlib.h>
80     #include <string.h>
81    
82 ph10 145 /* When compiling a DLL for Windows, the exported symbols have to be declared
83     using some MS magic. I found some useful information on this web page:
84     http://msdn2.microsoft.com/en-us/library/y4h7bcy6(VS.80).aspx. According to the
85 ph10 154 information there, using __declspec(dllexport) without "extern" we have a
86 ph10 145 definition; with "extern" we have a declaration. The settings here override the
87     setting in pcre.h (which is included below); it defines only PCRE_EXP_DECL,
88 ph10 154 which is all that is needed for applications (they just import the symbols). We
89     use:
90 ph10 145
91     PCRE_EXP_DECL for declarations
92     PCRE_EXP_DEFN for definitions of exported functions
93     PCRE_EXP_DATA_DEFN for definitions of exported variables
94    
95     The reason for the two DEFN macros is that in non-Windows environments, one
96     does not want to have "extern" before variable definitions because it leads to
97     compiler warnings. So we distinguish between functions and variables. In
98     Windows, the two should always be the same.
99    
100     The reason for wrapping this in #ifndef PCRE_EXP_DECL is so that pcretest,
101     which is an application, but needs to import this file in order to "peek" at
102 ph10 154 internals, can #include pcre.h first to get an application's-eye view.
103 ph10 145
104     In principle, people compiling for non-Windows, non-Unix-like (i.e. uncommon,
105     special-purpose environments) might want to stick other stuff in front of
106     exported symbols. That's why, in the non-Windows case, we set PCRE_EXP_DEFN and
107     PCRE_EXP_DATA_DEFN only if they are not already set. */
108    
109     #ifndef PCRE_EXP_DECL
110     # ifdef _WIN32
111 ph10 199 # ifndef PCRE_STATIC
112 ph10 145 # define PCRE_EXP_DECL extern __declspec(dllexport)
113     # define PCRE_EXP_DEFN __declspec(dllexport)
114     # define PCRE_EXP_DATA_DEFN __declspec(dllexport)
115     # else
116     # define PCRE_EXP_DECL extern
117     # define PCRE_EXP_DEFN
118     # define PCRE_EXP_DATA_DEFN
119     # endif
120     # else
121     # ifdef __cplusplus
122     # define PCRE_EXP_DECL extern "C"
123     # else
124     # define PCRE_EXP_DECL extern
125     # endif
126     # ifndef PCRE_EXP_DEFN
127     # define PCRE_EXP_DEFN PCRE_EXP_DECL
128     # endif
129     # ifndef PCRE_EXP_DATA_DEFN
130     # define PCRE_EXP_DATA_DEFN
131     # endif
132     # endif
133 nigel 77 #endif
134    
135 ph10 359 /* When compiling with the MSVC compiler, it is sometimes necessary to include
136 ph10 371 a "calling convention" before exported function names. (This is secondhand
137 ph10 359 information; I know nothing about MSVC myself). For example, something like
138    
139     void __cdecl function(....)
140 ph10 371
141 ph10 359 might be needed. In order so make this easy, all the exported functions have
142     PCRE_CALL_CONVENTION just before their names. It is rarely needed; if not
143 ph10 371 set, we ensure here that it has no effect. */
144 ph10 359
145     #ifndef PCRE_CALL_CONVENTION
146     #define PCRE_CALL_CONVENTION
147     #endif
148    
149 nigel 77 /* We need to have types that specify unsigned 16-bit and 32-bit integers. We
150     cannot determine these outside the compilation (e.g. by running a program as
151     part of "configure") because PCRE is often cross-compiled for use on other
152     systems. Instead we make use of the maximum sizes that are available at
153     preprocessor time in standard C environments. */
154    
155     #if USHRT_MAX == 65535
156     typedef unsigned short pcre_uint16;
157 ph10 349 typedef short pcre_int16;
158 nigel 77 #elif UINT_MAX == 65535
159     typedef unsigned int pcre_uint16;
160 ph10 349 typedef int pcre_int16;
161 nigel 77 #else
162     #error Cannot determine a type for 16-bit unsigned integers
163     #endif
164    
165     #if UINT_MAX == 4294967295
166     typedef unsigned int pcre_uint32;
167 ph10 349 typedef int pcre_int32;
168 nigel 77 #elif ULONG_MAX == 4294967295
169     typedef unsigned long int pcre_uint32;
170 ph10 349 typedef long int pcre_int32;
171 nigel 77 #else
172     #error Cannot determine a type for 32-bit unsigned integers
173     #endif
174    
175     /* All character handling must be done as unsigned characters. Otherwise there
176     are problems with top-bit-set characters and functions such as isspace().
177     However, we leave the interface to the outside world as char *, because that
178     should make things easier for callers. We define a short type for unsigned char
179     to save lots of typing. I tried "uchar", but it causes problems on Digital
180     Unix, where it is defined in sys/types, so use "uschar" instead. */
181    
182     typedef unsigned char uschar;
183    
184 nigel 93 /* This is an unsigned int value that no character can ever have. UTF-8
185     characters only go up to 0x7fffffff (though Unicode doesn't go beyond
186     0x0010ffff). */
187 nigel 91
188 nigel 93 #define NOTACHAR 0xffffffff
189    
190     /* PCRE is able to support several different kinds of newline (CR, LF, CRLF,
191 ph10 149 "any" and "anycrlf" at present). The following macros are used to package up
192     testing for newlines. NLBLOCK, PSSTART, and PSEND are defined in the various
193     modules to indicate in which datablock the parameters exist, and what the
194     start/end of string field names are. */
195 nigel 93
196 ph10 149 #define NLTYPE_FIXED 0 /* Newline is a fixed length string */
197     #define NLTYPE_ANY 1 /* Newline is any Unicode line ending */
198     #define NLTYPE_ANYCRLF 2 /* Newline is CR, LF, or CRLF */
199 nigel 93
200     /* This macro checks for a newline at the given position */
201    
202 nigel 91 #define IS_NEWLINE(p) \
203 nigel 93 ((NLBLOCK->nltype != NLTYPE_FIXED)? \
204     ((p) < NLBLOCK->PSEND && \
205 ph10 149 _pcre_is_newline((p), NLBLOCK->nltype, NLBLOCK->PSEND, &(NLBLOCK->nllen),\
206     utf8)) \
207 nigel 93 : \
208     ((p) <= NLBLOCK->PSEND - NLBLOCK->nllen && \
209     (p)[0] == NLBLOCK->nl[0] && \
210     (NLBLOCK->nllen == 1 || (p)[1] == NLBLOCK->nl[1]) \
211     ) \
212     )
213 nigel 91
214 nigel 93 /* This macro checks for a newline immediately preceding the given position */
215    
216     #define WAS_NEWLINE(p) \
217     ((NLBLOCK->nltype != NLTYPE_FIXED)? \
218     ((p) > NLBLOCK->PSSTART && \
219 ph10 149 _pcre_was_newline((p), NLBLOCK->nltype, NLBLOCK->PSSTART, \
220     &(NLBLOCK->nllen), utf8)) \
221 nigel 93 : \
222     ((p) >= NLBLOCK->PSSTART + NLBLOCK->nllen && \
223     (p)[-NLBLOCK->nllen] == NLBLOCK->nl[0] && \
224     (NLBLOCK->nllen == 1 || (p)[-NLBLOCK->nllen+1] == NLBLOCK->nl[1]) \
225     ) \
226     )
227    
228 nigel 87 /* When PCRE is compiled as a C++ library, the subject pointer can be replaced
229     with a custom type. This makes it possible, for example, to allow pcre_exec()
230     to process subject strings that are discontinuous by using a smart pointer
231     class. It must always be possible to inspect all of the subject string in
232     pcre_exec() because of the way it backtracks. Two macros are required in the
233     normal case, for sign-unspecified and unsigned char pointers. The former is
234     used for the external interface and appears in pcre.h, which is why its name
235     must begin with PCRE_. */
236    
237     #ifdef CUSTOM_SUBJECT_PTR
238     #define PCRE_SPTR CUSTOM_SUBJECT_PTR
239     #define USPTR CUSTOM_SUBJECT_PTR
240     #else
241     #define PCRE_SPTR const char *
242     #define USPTR const unsigned char *
243     #endif
244    
245 ph10 145
246    
247 nigel 85 /* Include the public PCRE header and the definitions of UCP character property
248     values. */
249 nigel 77
250 ph10 189 #include "pcre.h"
251 nigel 77 #include "ucp.h"
252    
253     /* When compiling for use with the Virtual Pascal compiler, these functions
254     need to have their names changed. PCRE must be compiled with the -DVPCOMPAT
255     option on the command line. */
256    
257     #ifdef VPCOMPAT
258 ph10 101 #define strlen(s) _strlen(s)
259 nigel 77 #define strncmp(s1,s2,m) _strncmp(s1,s2,m)
260 ph10 101 #define memcmp(s,c,n) _memcmp(s,c,n)
261 nigel 77 #define memcpy(d,s,n) _memcpy(d,s,n)
262     #define memmove(d,s,n) _memmove(d,s,n)
263     #define memset(s,c,n) _memset(s,c,n)
264     #else /* VPCOMPAT */
265    
266     /* To cope with SunOS4 and other systems that lack memmove() but have bcopy(),
267     define a macro for memmove() if HAVE_MEMMOVE is false, provided that HAVE_BCOPY
268     is set. Otherwise, include an emulating function for those systems that have
269 ph10 118 neither (there some non-Unix environments where this is the case). */
270 nigel 77
271 ph10 137 #ifndef HAVE_MEMMOVE
272 nigel 77 #undef memmove /* some systems may have a macro */
273 ph10 137 #ifdef HAVE_BCOPY
274 nigel 77 #define memmove(a, b, c) bcopy(b, a, c)
275     #else /* HAVE_BCOPY */
276 nigel 91 static void *
277 ph10 108 pcre_memmove(void *d, const void *s, size_t n)
278 nigel 77 {
279 nigel 87 size_t i;
280 ph10 108 unsigned char *dest = (unsigned char *)d;
281     const unsigned char *src = (const unsigned char *)s;
282 ph10 118 if (dest > src)
283     {
284     dest += n;
285     src += n;
286     for (i = 0; i < n; ++i) *(--dest) = *(--src);
287     return (void *)dest;
288     }
289     else
290     {
291     for (i = 0; i < n; ++i) *dest++ = *src++;
292 ph10 123 return (void *)(dest - n);
293     }
294 nigel 77 }
295     #define memmove(a, b, c) pcre_memmove(a, b, c)
296     #endif /* not HAVE_BCOPY */
297     #endif /* not HAVE_MEMMOVE */
298     #endif /* not VPCOMPAT */
299    
300    
301     /* PCRE keeps offsets in its compiled code as 2-byte quantities (always stored
302     in big-endian order) by default. These are used, for example, to link from the
303     start of a subpattern to its alternatives and its end. The use of 2 bytes per
304     offset limits the size of the compiled regex to around 64K, which is big enough
305     for almost everybody. However, I received a request for an even bigger limit.
306     For this reason, and also to make the code easier to maintain, the storing and
307     loading of offsets from the byte string is now handled by the macros that are
308     defined here.
309    
310     The macros are controlled by the value of LINK_SIZE. This defaults to 2 in
311     the config.h file, but can be overridden by using -D on the command line. This
312     is automated on Unix systems via the "configure" command. */
313    
314     #if LINK_SIZE == 2
315    
316     #define PUT(a,n,d) \
317     (a[n] = (d) >> 8), \
318     (a[(n)+1] = (d) & 255)
319    
320     #define GET(a,n) \
321     (((a)[n] << 8) | (a)[(n)+1])
322    
323     #define MAX_PATTERN_SIZE (1 << 16)
324    
325    
326     #elif LINK_SIZE == 3
327    
328     #define PUT(a,n,d) \
329     (a[n] = (d) >> 16), \
330     (a[(n)+1] = (d) >> 8), \
331     (a[(n)+2] = (d) & 255)
332    
333     #define GET(a,n) \
334     (((a)[n] << 16) | ((a)[(n)+1] << 8) | (a)[(n)+2])
335    
336     #define MAX_PATTERN_SIZE (1 << 24)
337    
338    
339     #elif LINK_SIZE == 4
340    
341     #define PUT(a,n,d) \
342     (a[n] = (d) >> 24), \
343     (a[(n)+1] = (d) >> 16), \
344     (a[(n)+2] = (d) >> 8), \
345     (a[(n)+3] = (d) & 255)
346    
347     #define GET(a,n) \
348     (((a)[n] << 24) | ((a)[(n)+1] << 16) | ((a)[(n)+2] << 8) | (a)[(n)+3])
349    
350     #define MAX_PATTERN_SIZE (1 << 30) /* Keep it positive */
351    
352    
353     #else
354     #error LINK_SIZE must be either 2, 3, or 4
355     #endif
356    
357    
358     /* Convenience macro defined in terms of the others */
359    
360     #define PUTINC(a,n,d) PUT(a,n,d), a += LINK_SIZE
361    
362    
363     /* PCRE uses some other 2-byte quantities that do not change when the size of
364     offsets changes. There are used for repeat counts and for other things such as
365     capturing parenthesis numbers in back references. */
366    
367     #define PUT2(a,n,d) \
368     a[n] = (d) >> 8; \
369     a[(n)+1] = (d) & 255
370    
371     #define GET2(a,n) \
372     (((a)[n] << 8) | (a)[(n)+1])
373    
374     #define PUT2INC(a,n,d) PUT2(a,n,d), a += 2
375    
376    
377     /* When UTF-8 encoding is being used, a character is no longer just a single
378     byte. The macros for character handling generate simple sequences when used in
379 ph10 208 byte-mode, and more complicated ones for UTF-8 characters. BACKCHAR should
380     never be called in byte mode. To make sure it can never even appear when UTF-8
381 ph10 207 support is omitted, we don't even define it. */
382 nigel 77
383     #ifndef SUPPORT_UTF8
384     #define GETCHAR(c, eptr) c = *eptr;
385     #define GETCHARTEST(c, eptr) c = *eptr;
386     #define GETCHARINC(c, eptr) c = *eptr++;
387     #define GETCHARINCTEST(c, eptr) c = *eptr++;
388     #define GETCHARLEN(c, eptr, len) c = *eptr;
389 ph10 207 /* #define BACKCHAR(eptr) */
390 nigel 77
391     #else /* SUPPORT_UTF8 */
392    
393     /* Get the next UTF-8 character, not advancing the pointer. This is called when
394     we know we are in UTF-8 mode. */
395    
396     #define GETCHAR(c, eptr) \
397     c = *eptr; \
398 nigel 93 if (c >= 0xc0) \
399 nigel 77 { \
400     int gcii; \
401     int gcaa = _pcre_utf8_table4[c & 0x3f]; /* Number of additional bytes */ \
402     int gcss = 6*gcaa; \
403     c = (c & _pcre_utf8_table3[gcaa]) << gcss; \
404     for (gcii = 1; gcii <= gcaa; gcii++) \
405     { \
406     gcss -= 6; \
407     c |= (eptr[gcii] & 0x3f) << gcss; \
408     } \
409     }
410    
411     /* Get the next UTF-8 character, testing for UTF-8 mode, and not advancing the
412     pointer. */
413    
414     #define GETCHARTEST(c, eptr) \
415     c = *eptr; \
416 nigel 93 if (utf8 && c >= 0xc0) \
417 nigel 77 { \
418     int gcii; \
419     int gcaa = _pcre_utf8_table4[c & 0x3f]; /* Number of additional bytes */ \
420     int gcss = 6*gcaa; \
421     c = (c & _pcre_utf8_table3[gcaa]) << gcss; \
422     for (gcii = 1; gcii <= gcaa; gcii++) \
423     { \
424     gcss -= 6; \
425     c |= (eptr[gcii] & 0x3f) << gcss; \
426     } \
427     }
428    
429     /* Get the next UTF-8 character, advancing the pointer. This is called when we
430     know we are in UTF-8 mode. */
431    
432     #define GETCHARINC(c, eptr) \
433     c = *eptr++; \
434 nigel 93 if (c >= 0xc0) \
435 nigel 77 { \
436     int gcaa = _pcre_utf8_table4[c & 0x3f]; /* Number of additional bytes */ \
437     int gcss = 6*gcaa; \
438     c = (c & _pcre_utf8_table3[gcaa]) << gcss; \
439     while (gcaa-- > 0) \
440     { \
441     gcss -= 6; \
442     c |= (*eptr++ & 0x3f) << gcss; \
443     } \
444     }
445    
446     /* Get the next character, testing for UTF-8 mode, and advancing the pointer */
447    
448     #define GETCHARINCTEST(c, eptr) \
449     c = *eptr++; \
450 nigel 93 if (utf8 && c >= 0xc0) \
451 nigel 77 { \
452     int gcaa = _pcre_utf8_table4[c & 0x3f]; /* Number of additional bytes */ \
453     int gcss = 6*gcaa; \
454     c = (c & _pcre_utf8_table3[gcaa]) << gcss; \
455     while (gcaa-- > 0) \
456     { \
457     gcss -= 6; \
458     c |= (*eptr++ & 0x3f) << gcss; \
459     } \
460     }
461    
462     /* Get the next UTF-8 character, not advancing the pointer, incrementing length
463     if there are extra bytes. This is called when we know we are in UTF-8 mode. */
464    
465     #define GETCHARLEN(c, eptr, len) \
466     c = *eptr; \
467 nigel 93 if (c >= 0xc0) \
468 nigel 77 { \
469     int gcii; \
470     int gcaa = _pcre_utf8_table4[c & 0x3f]; /* Number of additional bytes */ \
471     int gcss = 6*gcaa; \
472     c = (c & _pcre_utf8_table3[gcaa]) << gcss; \
473     for (gcii = 1; gcii <= gcaa; gcii++) \
474     { \
475     gcss -= 6; \
476     c |= (eptr[gcii] & 0x3f) << gcss; \
477     } \
478     len += gcaa; \
479     }
480    
481 ph10 384 /* Get the next UTF-8 character, testing for UTF-8 mode, not advancing the
482     pointer, incrementing length if there are extra bytes. This is called when we
483     know we are in UTF-8 mode. */
484    
485     #define GETCHARLENTEST(c, eptr, len) \
486     c = *eptr; \
487     if (utf8 && c >= 0xc0) \
488     { \
489     int gcii; \
490     int gcaa = _pcre_utf8_table4[c & 0x3f]; /* Number of additional bytes */ \
491     int gcss = 6*gcaa; \
492     c = (c & _pcre_utf8_table3[gcaa]) << gcss; \
493     for (gcii = 1; gcii <= gcaa; gcii++) \
494     { \
495     gcss -= 6; \
496     c |= (eptr[gcii] & 0x3f) << gcss; \
497     } \
498     len += gcaa; \
499     }
500    
501 nigel 77 /* If the pointer is not at the start of a character, move it back until
502 ph10 208 it is. This is called only in UTF-8 mode - we don't put a test within the macro
503 ph10 207 because almost all calls are already within a block of UTF-8 only code. */
504 nigel 77
505 ph10 207 #define BACKCHAR(eptr) while((*eptr & 0xc0) == 0x80) eptr--
506 nigel 77
507     #endif
508    
509    
510     /* In case there is no definition of offsetof() provided - though any proper
511     Standard C system should have one. */
512    
513     #ifndef offsetof
514     #define offsetof(p_type,field) ((size_t)&(((p_type *)0)->field))
515     #endif
516    
517    
518     /* These are the public options that can change during matching. */
519    
520     #define PCRE_IMS (PCRE_CASELESS|PCRE_MULTILINE|PCRE_DOTALL)
521    
522 ph10 231 /* Private flags containing information about the compiled regex. They used to
523     live at the top end of the options word, but that got almost full, so now they
524 ph10 230 are in a 16-bit flags word. */
525 nigel 77
526 ph10 230 #define PCRE_NOPARTIAL 0x0001 /* can't use partial with this regex */
527     #define PCRE_FIRSTSET 0x0002 /* first_byte is set */
528     #define PCRE_REQCHSET 0x0004 /* req_byte is set */
529     #define PCRE_STARTLINE 0x0008 /* start after \n for multiline */
530     #define PCRE_JCHANGED 0x0010 /* j option used in regex */
531     #define PCRE_HASCRORLF 0x0020 /* explicit \r or \n in pattern */
532 nigel 77
533     /* Options for the "extra" block produced by pcre_study(). */
534    
535     #define PCRE_STUDY_MAPPED 0x01 /* a map of starting chars exists */
536    
537     /* Masks for identifying the public options that are permitted at compile
538     time, run time, or study time, respectively. */
539    
540 ph10 149 #define PCRE_NEWLINE_BITS (PCRE_NEWLINE_CR|PCRE_NEWLINE_LF|PCRE_NEWLINE_ANY| \
541     PCRE_NEWLINE_ANYCRLF)
542 nigel 93
543 ph10 389 #define PUBLIC_COMPILE_OPTIONS \
544 nigel 77 (PCRE_CASELESS|PCRE_EXTENDED|PCRE_ANCHORED|PCRE_MULTILINE| \
545     PCRE_DOTALL|PCRE_DOLLAR_ENDONLY|PCRE_EXTRA|PCRE_UNGREEDY|PCRE_UTF8| \
546 nigel 91 PCRE_NO_AUTO_CAPTURE|PCRE_NO_UTF8_CHECK|PCRE_AUTO_CALLOUT|PCRE_FIRSTLINE| \
547 ph10 336 PCRE_DUPNAMES|PCRE_NEWLINE_BITS|PCRE_BSR_ANYCRLF|PCRE_BSR_UNICODE| \
548     PCRE_JAVASCRIPT_COMPAT)
549 nigel 77
550     #define PUBLIC_EXEC_OPTIONS \
551     (PCRE_ANCHORED|PCRE_NOTBOL|PCRE_NOTEOL|PCRE_NOTEMPTY|PCRE_NO_UTF8_CHECK| \
552 ph10 389 PCRE_PARTIAL|PCRE_NEWLINE_BITS|PCRE_BSR_ANYCRLF|PCRE_BSR_UNICODE| \
553     PCRE_NO_START_OPTIMIZE)
554 nigel 77
555     #define PUBLIC_DFA_EXEC_OPTIONS \
556     (PCRE_ANCHORED|PCRE_NOTBOL|PCRE_NOTEOL|PCRE_NOTEMPTY|PCRE_NO_UTF8_CHECK| \
557 ph10 231 PCRE_PARTIAL|PCRE_DFA_SHORTEST|PCRE_DFA_RESTART|PCRE_NEWLINE_BITS| \
558 ph10 389 PCRE_BSR_ANYCRLF|PCRE_BSR_UNICODE|PCRE_NO_START_OPTIMIZE)
559 nigel 77
560     #define PUBLIC_STUDY_OPTIONS 0 /* None defined */
561    
562     /* Magic number to provide a small check against being handed junk. Also used
563     to detect whether a pattern was compiled on a host of different endianness. */
564    
565     #define MAGIC_NUMBER 0x50435245UL /* 'PCRE' */
566    
567     /* Negative values for the firstchar and reqchar variables */
568    
569     #define REQ_UNSET (-2)
570     #define REQ_NONE (-1)
571    
572     /* The maximum remaining length of subject we are prepared to search for a
573     req_byte match. */
574    
575     #define REQ_BYTE_MAX 1000
576    
577     /* Flags added to firstbyte or reqbyte; a "non-literal" item is either a
578     variable-length repeat, or a anything other than literal characters. */
579    
580     #define REQ_CASELESS 0x0100 /* indicates caselessness */
581     #define REQ_VARY 0x0200 /* reqbyte followed non-literal item */
582    
583 ph10 369 /* Miscellaneous definitions. The #ifndef is to pacify compiler warnings in
584 ph10 376 environments where these macros are defined elsewhere. Unfortunately, there
585     is no way to do the same for the typedef. */
586 nigel 77
587     typedef int BOOL;
588    
589 ph10 376 #ifndef FALSE
590 nigel 77 #define FALSE 0
591     #define TRUE 1
592 ph10 369 #endif
593 nigel 77
594 nigel 93 /* Escape items that are just an encoding of a particular data value. */
595 nigel 77
596     #ifndef ESC_e
597     #define ESC_e 27
598     #endif
599    
600     #ifndef ESC_f
601     #define ESC_f '\f'
602     #endif
603    
604     #ifndef ESC_n
605 nigel 93 #define ESC_n '\n'
606 nigel 77 #endif
607    
608     #ifndef ESC_r
609     #define ESC_r '\r'
610     #endif
611    
612     /* We can't officially use ESC_t because it is a POSIX reserved identifier
613     (presumably because of all the others like size_t). */
614    
615     #ifndef ESC_tee
616     #define ESC_tee '\t'
617     #endif
618    
619 nigel 87 /* Codes for different types of Unicode property */
620    
621     #define PT_ANY 0 /* Any property - matches all chars */
622     #define PT_LAMP 1 /* L& - the union of Lu, Ll, Lt */
623     #define PT_GC 2 /* General characteristic (e.g. L) */
624     #define PT_PC 3 /* Particular characteristic (e.g. Lu) */
625     #define PT_SC 4 /* Script (e.g. Han) */
626    
627     /* Flag bits and data types for the extended class (OP_XCLASS) for classes that
628     contain UTF-8 characters with values greater than 255. */
629    
630     #define XCL_NOT 0x01 /* Flag: this is a negative class */
631     #define XCL_MAP 0x02 /* Flag: a 32-byte map is present */
632    
633     #define XCL_END 0 /* Marks end of individual items */
634     #define XCL_SINGLE 1 /* Single item (one multibyte char) follows */
635     #define XCL_RANGE 2 /* A range (two multibyte chars) follows */
636     #define XCL_PROP 3 /* Unicode property (2-byte property code follows) */
637     #define XCL_NOTPROP 4 /* Unicode inverted property (ditto) */
638    
639 nigel 77 /* These are escaped items that aren't just an encoding of a particular data
640     value such as \n. They must have non-zero values, as check_escape() returns
641     their negation. Also, they must appear in the same order as in the opcode
642     definitions below, up to ESC_z. There's a dummy for OP_ANY because it
643 ph10 345 corresponds to "." rather than an escape sequence, and another for OP_ALLANY
644 ph10 341 (which is used for [^] in JavaScript compatibility mode).
645 nigel 77
646 ph10 341 The final escape must be ESC_REF as subsequent values are used for
647     backreferences (\1, \2, \3, etc). There are two tests in the code for an escape
648     greater than ESC_b and less than ESC_Z to detect the types that may be
649     repeated. These are the types that consume characters. If any new escapes are
650     put in between that don't consume a character, that code will have to change.
651     */
652    
653 ph10 172 enum { ESC_A = 1, ESC_G, ESC_K, ESC_B, ESC_b, ESC_D, ESC_d, ESC_S, ESC_s,
654 ph10 345 ESC_W, ESC_w, ESC_dum1, ESC_dum2, ESC_C, ESC_P, ESC_p, ESC_R, ESC_H,
655     ESC_h, ESC_V, ESC_v, ESC_X, ESC_Z, ESC_z, ESC_E, ESC_Q, ESC_g, ESC_k,
656 ph10 341 ESC_REF };
657 nigel 77
658 nigel 93
659 ph10 210 /* Opcode table: Starting from 1 (i.e. after OP_END), the values up to
660 nigel 77 OP_EOD must correspond in order to the list of escapes immediately above.
661    
662 nigel 93 *** NOTE NOTE NOTE *** Whenever this list is updated, the two macro definitions
663     that follow must also be updated to match. There is also a table called
664     "coptable" in pcre_dfa_exec.c that must be updated. */
665    
666 nigel 77 enum {
667     OP_END, /* 0 End of pattern */
668    
669     /* Values corresponding to backslashed metacharacters */
670    
671     OP_SOD, /* 1 Start of data: \A */
672     OP_SOM, /* 2 Start of match (subject + offset): \G */
673 ph10 172 OP_SET_SOM, /* 3 Set start of match (\K) */
674 ph10 168 OP_NOT_WORD_BOUNDARY, /* 4 \B */
675     OP_WORD_BOUNDARY, /* 5 \b */
676     OP_NOT_DIGIT, /* 6 \D */
677     OP_DIGIT, /* 7 \d */
678     OP_NOT_WHITESPACE, /* 8 \S */
679     OP_WHITESPACE, /* 9 \s */
680     OP_NOT_WORDCHAR, /* 10 \W */
681     OP_WORDCHAR, /* 11 \w */
682 ph10 341 OP_ANY, /* 12 Match any character (subject to DOTALL) */
683     OP_ALLANY, /* 13 Match any character (not subject to DOTALL) */
684     OP_ANYBYTE, /* 14 Match any byte (\C); different to OP_ANY for UTF-8 */
685     OP_NOTPROP, /* 15 \P (not Unicode property) */
686     OP_PROP, /* 16 \p (Unicode property) */
687     OP_ANYNL, /* 17 \R (any newline sequence) */
688     OP_NOT_HSPACE, /* 18 \H (not horizontal whitespace) */
689     OP_HSPACE, /* 19 \h (horizontal whitespace) */
690     OP_NOT_VSPACE, /* 20 \V (not vertical whitespace) */
691     OP_VSPACE, /* 21 \v (vertical whitespace) */
692     OP_EXTUNI, /* 22 \X (extended Unicode sequence */
693     OP_EODN, /* 23 End of data or \n at end of data: \Z. */
694     OP_EOD, /* 24 End of data: \z */
695 nigel 77
696 ph10 341 OP_OPT, /* 25 Set runtime options */
697     OP_CIRC, /* 26 Start of line - varies with multiline switch */
698     OP_DOLL, /* 27 End of line - varies with multiline switch */
699     OP_CHAR, /* 28 Match one character, casefully */
700     OP_CHARNC, /* 29 Match one character, caselessly */
701     OP_NOT, /* 30 Match one character, not the following one */
702 nigel 77
703 ph10 341 OP_STAR, /* 31 The maximizing and minimizing versions of */
704     OP_MINSTAR, /* 32 these six opcodes must come in pairs, with */
705     OP_PLUS, /* 33 the minimizing one second. */
706     OP_MINPLUS, /* 34 This first set applies to single characters.*/
707     OP_QUERY, /* 35 */
708     OP_MINQUERY, /* 36 */
709 nigel 77
710 ph10 341 OP_UPTO, /* 37 From 0 to n matches */
711     OP_MINUPTO, /* 38 */
712     OP_EXACT, /* 39 Exactly n matches */
713 nigel 77
714 ph10 341 OP_POSSTAR, /* 40 Possessified star */
715     OP_POSPLUS, /* 41 Possessified plus */
716     OP_POSQUERY, /* 42 Posesssified query */
717     OP_POSUPTO, /* 43 Possessified upto */
718 nigel 77
719 ph10 341 OP_NOTSTAR, /* 44 The maximizing and minimizing versions of */
720     OP_NOTMINSTAR, /* 45 these six opcodes must come in pairs, with */
721     OP_NOTPLUS, /* 46 the minimizing one second. They must be in */
722     OP_NOTMINPLUS, /* 47 exactly the same order as those above. */
723     OP_NOTQUERY, /* 48 This set applies to "not" single characters. */
724     OP_NOTMINQUERY, /* 49 */
725 nigel 77
726 ph10 341 OP_NOTUPTO, /* 50 From 0 to n matches */
727     OP_NOTMINUPTO, /* 51 */
728     OP_NOTEXACT, /* 52 Exactly n matches */
729 nigel 93
730 ph10 341 OP_NOTPOSSTAR, /* 53 Possessified versions */
731     OP_NOTPOSPLUS, /* 54 */
732     OP_NOTPOSQUERY, /* 55 */
733     OP_NOTPOSUPTO, /* 56 */
734 nigel 93
735 ph10 341 OP_TYPESTAR, /* 57 The maximizing and minimizing versions of */
736     OP_TYPEMINSTAR, /* 58 these six opcodes must come in pairs, with */
737     OP_TYPEPLUS, /* 59 the minimizing one second. These codes must */
738     OP_TYPEMINPLUS, /* 60 be in exactly the same order as those above. */
739     OP_TYPEQUERY, /* 61 This set applies to character types such as \d */
740     OP_TYPEMINQUERY, /* 62 */
741 nigel 93
742 ph10 341 OP_TYPEUPTO, /* 63 From 0 to n matches */
743     OP_TYPEMINUPTO, /* 64 */
744     OP_TYPEEXACT, /* 65 Exactly n matches */
745 nigel 93
746 ph10 341 OP_TYPEPOSSTAR, /* 66 Possessified versions */
747     OP_TYPEPOSPLUS, /* 67 */
748     OP_TYPEPOSQUERY, /* 68 */
749     OP_TYPEPOSUPTO, /* 69 */
750 nigel 93
751 ph10 341 OP_CRSTAR, /* 70 The maximizing and minimizing versions of */
752     OP_CRMINSTAR, /* 71 all these opcodes must come in pairs, with */
753     OP_CRPLUS, /* 72 the minimizing one second. These codes must */
754     OP_CRMINPLUS, /* 73 be in exactly the same order as those above. */
755     OP_CRQUERY, /* 74 These are for character classes and back refs */
756     OP_CRMINQUERY, /* 75 */
757     OP_CRRANGE, /* 76 These are different to the three sets above. */
758     OP_CRMINRANGE, /* 77 */
759 nigel 93
760 ph10 341 OP_CLASS, /* 78 Match a character class, chars < 256 only */
761     OP_NCLASS, /* 79 Same, but the bitmap was created from a negative
762 nigel 77 class - the difference is relevant only when a UTF-8
763     character > 255 is encountered. */
764    
765 ph10 341 OP_XCLASS, /* 80 Extended class for handling UTF-8 chars within the
766 nigel 77 class. This does both positive and negative. */
767    
768 ph10 341 OP_REF, /* 81 Match a back reference */
769     OP_RECURSE, /* 82 Match a numbered subpattern (possibly recursive) */
770     OP_CALLOUT, /* 83 Call out to external function if provided */
771 nigel 77
772 ph10 341 OP_ALT, /* 84 Start of alternation */
773     OP_KET, /* 85 End of group that doesn't have an unbounded repeat */
774     OP_KETRMAX, /* 86 These two must remain together and in this */
775     OP_KETRMIN, /* 87 order. They are for groups the repeat for ever. */
776 nigel 77
777 nigel 93 /* The assertions must come before BRA, CBRA, ONCE, and COND.*/
778 nigel 77
779 ph10 341 OP_ASSERT, /* 88 Positive lookahead */
780     OP_ASSERT_NOT, /* 89 Negative lookahead */
781     OP_ASSERTBACK, /* 90 Positive lookbehind */
782     OP_ASSERTBACK_NOT, /* 91 Negative lookbehind */
783     OP_REVERSE, /* 92 Move pointer back - used in lookbehind assertions */
784 nigel 77
785 nigel 93 /* ONCE, BRA, CBRA, and COND must come after the assertions, with ONCE first,
786     as there's a test for >= ONCE for a subpattern that isn't an assertion. */
787 nigel 77
788 ph10 341 OP_ONCE, /* 93 Atomic group */
789     OP_BRA, /* 94 Start of non-capturing bracket */
790     OP_CBRA, /* 95 Start of capturing bracket */
791     OP_COND, /* 96 Conditional group */
792 nigel 77
793 nigel 93 /* These three must follow the previous three, in the same order. There's a
794     check for >= SBRA to distinguish the two sets. */
795 nigel 77
796 ph10 341 OP_SBRA, /* 97 Start of non-capturing bracket, check empty */
797     OP_SCBRA, /* 98 Start of capturing bracket, check empty */
798     OP_SCOND, /* 99 Conditional group, check empty */
799 nigel 77
800 ph10 341 OP_CREF, /* 100 Used to hold a capture number as condition */
801     OP_RREF, /* 101 Used to hold a recursion number as condition */
802     OP_DEF, /* 102 The DEFINE condition */
803 nigel 93
804 ph10 341 OP_BRAZERO, /* 103 These two must remain together and in this */
805     OP_BRAMINZERO, /* 104 order. */
806 ph10 210
807     /* These are backtracking control verbs */
808    
809 ph10 341 OP_PRUNE, /* 105 */
810     OP_SKIP, /* 106 */
811     OP_THEN, /* 107 */
812     OP_COMMIT, /* 108 */
813 ph10 210
814     /* These are forced failure and success verbs */
815    
816 ph10 341 OP_FAIL, /* 109 */
817     OP_ACCEPT, /* 110 */
818 ph10 345
819 ph10 335 /* This is used to skip a subpattern with a {0} quantifier */
820 ph10 345
821 ph10 341 OP_SKIPZERO /* 111 */
822 nigel 77 };
823    
824    
825     /* This macro defines textual names for all the opcodes. These are used only
826     for debugging. The macro is referenced only in pcre_printint.c. */
827    
828     #define OP_NAME_LIST \
829 ph10 168 "End", "\\A", "\\G", "\\K", "\\B", "\\b", "\\D", "\\d", \
830 ph10 341 "\\S", "\\s", "\\W", "\\w", "Any", "AllAny", "Anybyte", \
831 ph10 178 "notprop", "prop", "\\R", "\\H", "\\h", "\\V", "\\v", \
832     "extuni", "\\Z", "\\z", \
833 nigel 77 "Opt", "^", "$", "char", "charnc", "not", \
834     "*", "*?", "+", "+?", "?", "??", "{", "{", "{", \
835 nigel 93 "*+","++", "?+", "{", \
836 nigel 77 "*", "*?", "+", "+?", "?", "??", "{", "{", "{", \
837 nigel 93 "*+","++", "?+", "{", \
838 nigel 77 "*", "*?", "+", "+?", "?", "??", "{", "{", "{", \
839 nigel 93 "*+","++", "?+", "{", \
840 nigel 77 "*", "*?", "+", "+?", "?", "??", "{", "{", \
841     "class", "nclass", "xclass", "Ref", "Recurse", "Callout", \
842     "Alt", "Ket", "KetRmax", "KetRmin", "Assert", "Assert not", \
843 nigel 93 "AssertB", "AssertB not", "Reverse", \
844 ph10 192 "Once", "Bra", "CBra", "Cond", "SBra", "SCBra", "SCond", \
845 ph10 210 "Cond ref", "Cond rec", "Cond def", "Brazero", "Braminzero", \
846 ph10 335 "*PRUNE", "*SKIP", "*THEN", "*COMMIT", "*FAIL", "*ACCEPT", \
847 ph10 345 "Skip zero"
848 nigel 77
849    
850     /* This macro defines the length of fixed length operations in the compiled
851     regex. The lengths are used when searching for specific things, and also in the
852     debugging printing of a compiled regex. We use a macro so that it can be
853     defined close to the definitions of the opcodes themselves.
854    
855     As things have been extended, some of these are no longer fixed lenths, but are
856     minima instead. For example, the length of a single-character repeat may vary
857     in UTF-8 mode. The code that uses this table must know about such things. */
858    
859     #define OP_LENGTHS \
860     1, /* End */ \
861 ph10 168 1, 1, 1, 1, 1, /* \A, \G, \K, \B, \b */ \
862     1, 1, 1, 1, 1, 1, /* \D, \d, \S, \s, \W, \w */ \
863 ph10 341 1, 1, 1, /* Any, AllAny, Anybyte */ \
864 ph10 178 3, 3, 1, /* NOTPROP, PROP, EXTUNI */ \
865     1, 1, 1, 1, 1, /* \R, \H, \h, \V, \v */ \
866 nigel 77 1, 1, 2, 1, 1, /* \Z, \z, Opt, ^, $ */ \
867     2, /* Char - the minimum length */ \
868     2, /* Charnc - the minimum length */ \
869     2, /* not */ \
870     /* Positive single-char repeats ** These are */ \
871     2, 2, 2, 2, 2, 2, /* *, *?, +, +?, ?, ?? ** minima in */ \
872     4, 4, 4, /* upto, minupto, exact ** UTF-8 mode */ \
873 nigel 93 2, 2, 2, 4, /* *+, ++, ?+, upto+ */ \
874 nigel 77 /* Negative single-char repeats - only for chars < 256 */ \
875     2, 2, 2, 2, 2, 2, /* NOT *, *?, +, +?, ?, ?? */ \
876     4, 4, 4, /* NOT upto, minupto, exact */ \
877 nigel 93 2, 2, 2, 4, /* Possessive *, +, ?, upto */ \
878 nigel 77 /* Positive type repeats */ \
879     2, 2, 2, 2, 2, 2, /* Type *, *?, +, +?, ?, ?? */ \
880     4, 4, 4, /* Type upto, minupto, exact */ \
881 nigel 93 2, 2, 2, 4, /* Possessive *+, ++, ?+, upto+ */ \
882 nigel 77 /* Character class & ref repeats */ \
883     1, 1, 1, 1, 1, 1, /* *, *?, +, +?, ?, ?? */ \
884     5, 5, /* CRRANGE, CRMINRANGE */ \
885     33, /* CLASS */ \
886     33, /* NCLASS */ \
887     0, /* XCLASS - variable length */ \
888     3, /* REF */ \
889     1+LINK_SIZE, /* RECURSE */ \
890     2+2*LINK_SIZE, /* CALLOUT */ \
891     1+LINK_SIZE, /* Alt */ \
892     1+LINK_SIZE, /* Ket */ \
893     1+LINK_SIZE, /* KetRmax */ \
894     1+LINK_SIZE, /* KetRmin */ \
895     1+LINK_SIZE, /* Assert */ \
896     1+LINK_SIZE, /* Assert not */ \
897     1+LINK_SIZE, /* Assert behind */ \
898     1+LINK_SIZE, /* Assert behind not */ \
899     1+LINK_SIZE, /* Reverse */ \
900 nigel 93 1+LINK_SIZE, /* ONCE */ \
901     1+LINK_SIZE, /* BRA */ \
902     3+LINK_SIZE, /* CBRA */ \
903 nigel 77 1+LINK_SIZE, /* COND */ \
904 nigel 93 1+LINK_SIZE, /* SBRA */ \
905     3+LINK_SIZE, /* SCBRA */ \
906     1+LINK_SIZE, /* SCOND */ \
907 nigel 77 3, /* CREF */ \
908 nigel 93 3, /* RREF */ \
909     1, /* DEF */ \
910 nigel 77 1, 1, /* BRAZERO, BRAMINZERO */ \
911 ph10 210 1, 1, 1, 1, /* PRUNE, SKIP, THEN, COMMIT, */ \
912 ph10 335 1, 1, 1 /* FAIL, ACCEPT, SKIPZERO */
913 nigel 77
914    
915 nigel 93 /* A magic value for OP_RREF to indicate the "any recursion" condition. */
916 nigel 77
917 nigel 93 #define RREF_ANY 0xffff
918 nigel 77
919     /* Error code numbers. They are given names so that they can more easily be
920     tracked. */
921    
922     enum { ERR0, ERR1, ERR2, ERR3, ERR4, ERR5, ERR6, ERR7, ERR8, ERR9,
923     ERR10, ERR11, ERR12, ERR13, ERR14, ERR15, ERR16, ERR17, ERR18, ERR19,
924     ERR20, ERR21, ERR22, ERR23, ERR24, ERR25, ERR26, ERR27, ERR28, ERR29,
925     ERR30, ERR31, ERR32, ERR33, ERR34, ERR35, ERR36, ERR37, ERR38, ERR39,
926 nigel 91 ERR40, ERR41, ERR42, ERR43, ERR44, ERR45, ERR46, ERR47, ERR48, ERR49,
927 ph10 210 ERR50, ERR51, ERR52, ERR53, ERR54, ERR55, ERR56, ERR57, ERR58, ERR59,
928 ph10 336 ERR60, ERR61, ERR62, ERR63, ERR64 };
929 nigel 77
930     /* The real format of the start of the pcre block; the index of names and the
931     code vector run on as long as necessary after the end. We store an explicit
932     offset to the name table so that if a regex is compiled on one host, saved, and
933     then run on another where the size of pointers is different, all might still
934     be well. For the case of compiled-on-4 and run-on-8, we include an extra
935     pointer that is always NULL. For future-proofing, a few dummy fields were
936     originally included - even though you can never get this planning right - but
937     there is only one left now.
938    
939     NOTE NOTE NOTE:
940     Because people can now save and re-use compiled patterns, any additions to this
941     structure should be made at the end, and something earlier (e.g. a new
942     flag in the options or one of the dummy fields) should indicate that the new
943     fields are present. Currently PCRE always sets the dummy fields to zero.
944     NOTE NOTE NOTE:
945     */
946    
947     typedef struct real_pcre {
948     pcre_uint32 magic_number;
949     pcre_uint32 size; /* Total that was malloced */
950 ph10 230 pcre_uint32 options; /* Public options */
951     pcre_uint16 flags; /* Private flags */
952     pcre_uint16 dummy1; /* For future use */
953 nigel 77 pcre_uint16 top_bracket;
954     pcre_uint16 top_backref;
955     pcre_uint16 first_byte;
956     pcre_uint16 req_byte;
957     pcre_uint16 name_table_offset; /* Offset to name table that follows */
958     pcre_uint16 name_entry_size; /* Size of any name items */
959     pcre_uint16 name_count; /* Number of name items */
960     pcre_uint16 ref_count; /* Reference count */
961    
962     const unsigned char *tables; /* Pointer to tables or NULL for std */
963     const unsigned char *nullpad; /* NULL padding */
964     } real_pcre;
965    
966     /* The format of the block used to store data from pcre_study(). The same
967     remark (see NOTE above) about extending this structure applies. */
968    
969     typedef struct pcre_study_data {
970     pcre_uint32 size; /* Total that was malloced */
971     pcre_uint32 options;
972     uschar start_bits[32];
973     } pcre_study_data;
974    
975     /* Structure for passing "static" information around between the functions
976     doing the compiling, so that they are thread-safe. */
977    
978     typedef struct compile_data {
979     const uschar *lcc; /* Points to lower casing table */
980     const uschar *fcc; /* Points to case-flipping table */
981     const uschar *cbits; /* Points to character type table */
982     const uschar *ctypes; /* Points to table of type maps */
983 nigel 93 const uschar *start_workspace;/* The start of working space */
984 nigel 77 const uschar *start_code; /* The start of the compiled code */
985     const uschar *start_pattern; /* The start of the pattern */
986 nigel 93 const uschar *end_pattern; /* The end of the pattern */
987     uschar *hwm; /* High watermark of workspace */
988 nigel 77 uschar *name_table; /* The name/number table */
989     int names_found; /* Number of entries so far */
990     int name_entry_size; /* Size of each entry */
991 ph10 270 int bracount; /* Count of capturing parens as we compile */
992 ph10 286 int final_bracount; /* Saved value after first pass */
993 nigel 77 int top_backref; /* Maximum back reference */
994     unsigned int backref_map; /* Bitmap of low back refs */
995 nigel 93 int external_options; /* External (initial) options */
996 ph10 231 int external_flags; /* External flag bits to be set */
997 nigel 77 int req_varyopt; /* "After variable item" flag for reqbyte */
998 ph10 211 BOOL had_accept; /* (*ACCEPT) encountered */
999 nigel 93 int nltype; /* Newline type */
1000     int nllen; /* Newline string length */
1001     uschar nl[4]; /* Newline string when fixed length */
1002 nigel 77 } compile_data;
1003    
1004     /* Structure for maintaining a chain of pointers to the currently incomplete
1005     branches, for testing for left recursion. */
1006    
1007     typedef struct branch_chain {
1008     struct branch_chain *outer;
1009     uschar *current;
1010     } branch_chain;
1011    
1012     /* Structure for items in a linked list that represents an explicit recursive
1013     call within the pattern. */
1014    
1015     typedef struct recursion_info {
1016     struct recursion_info *prevrec; /* Previous recursion record (or NULL) */
1017     int group_num; /* Number of group that was called */
1018     const uschar *after_call; /* "Return value": points after the call in the expr */
1019 ph10 168 USPTR save_start; /* Old value of mstart */
1020 nigel 77 int *offset_save; /* Pointer to start of saved offsets */
1021     int saved_max; /* Number of saved offsets */
1022     } recursion_info;
1023    
1024 nigel 93 /* Structure for building a chain of data for holding the values of the subject
1025     pointer at the start of each subpattern, so as to detect when an empty string
1026     has been matched by a subpattern - to break infinite loops. */
1027    
1028     typedef struct eptrblock {
1029     struct eptrblock *epb_prev;
1030     USPTR epb_saved_eptr;
1031     } eptrblock;
1032    
1033    
1034 nigel 77 /* Structure for passing "static" information around between the functions
1035     doing traditional NFA matching, so that they are thread-safe. */
1036    
1037     typedef struct match_data {
1038 nigel 87 unsigned long int match_call_count; /* As it says */
1039     unsigned long int match_limit; /* As it says */
1040     unsigned long int match_limit_recursion; /* As it says */
1041 nigel 77 int *offset_vector; /* Offset vector */
1042     int offset_end; /* One past the end */
1043     int offset_max; /* The maximum usable for return data */
1044 nigel 93 int nltype; /* Newline type */
1045     int nllen; /* Newline string length */
1046     uschar nl[4]; /* Newline string when fixed */
1047 nigel 77 const uschar *lcc; /* Points to lower casing table */
1048     const uschar *ctypes; /* Points to table of type maps */
1049     BOOL offset_overflow; /* Set if too many extractions */
1050     BOOL notbol; /* NOTBOL flag */
1051     BOOL noteol; /* NOTEOL flag */
1052     BOOL utf8; /* UTF8 flag */
1053 ph10 345 BOOL jscript_compat; /* JAVASCRIPT_COMPAT flag */
1054 nigel 77 BOOL endonly; /* Dollar not before final \n */
1055     BOOL notempty; /* Empty string match not wanted */
1056     BOOL partial; /* PARTIAL flag */
1057     BOOL hitend; /* Hit the end of the subject at some point */
1058 ph10 231 BOOL bsr_anycrlf; /* \R is just any CRLF, not full Unicode */
1059 nigel 77 const uschar *start_code; /* For use when recursing */
1060 nigel 87 USPTR start_subject; /* Start of the subject string */
1061     USPTR end_subject; /* End of the subject string */
1062 ph10 168 USPTR start_match_ptr; /* Start of matched string */
1063 nigel 87 USPTR end_match_ptr; /* Subject position at end match */
1064 nigel 77 int end_offset_top; /* Highwater mark at end of match */
1065     int capture_last; /* Most recent capture number */
1066     int start_offset; /* The start offset value */
1067 nigel 93 eptrblock *eptrchain; /* Chain of eptrblocks for tail recursions */
1068     int eptrn; /* Next free eptrblock */
1069 nigel 77 recursion_info *recursive; /* Linked list of recursion data */
1070     void *callout_data; /* To pass back to callouts */
1071     } match_data;
1072    
1073     /* A similar structure is used for the same purpose by the DFA matching
1074     functions. */
1075    
1076     typedef struct dfa_match_data {
1077     const uschar *start_code; /* Start of the compiled pattern */
1078     const uschar *start_subject; /* Start of the subject string */
1079     const uschar *end_subject; /* End of subject string */
1080     const uschar *tables; /* Character tables */
1081     int moptions; /* Match options */
1082     int poptions; /* Pattern options */
1083 nigel 93 int nltype; /* Newline type */
1084     int nllen; /* Newline string length */
1085     uschar nl[4]; /* Newline string when fixed */
1086 nigel 77 void *callout_data; /* To pass back to callouts */
1087     } dfa_match_data;
1088    
1089     /* Bit definitions for entries in the pcre_ctypes table. */
1090    
1091     #define ctype_space 0x01
1092     #define ctype_letter 0x02
1093     #define ctype_digit 0x04
1094     #define ctype_xdigit 0x08
1095 ph10 274 #define ctype_word 0x10 /* alphanumeric or '_' */
1096 nigel 77 #define ctype_meta 0x80 /* regexp meta char or zero (end pattern) */
1097    
1098     /* Offsets for the bitmap tables in pcre_cbits. Each table contains a set
1099     of bits for a class map. Some classes are built by combining these tables. */
1100    
1101     #define cbit_space 0 /* [:space:] or \s */
1102     #define cbit_xdigit 32 /* [:xdigit:] */
1103     #define cbit_digit 64 /* [:digit:] or \d */
1104     #define cbit_upper 96 /* [:upper:] */
1105     #define cbit_lower 128 /* [:lower:] */
1106     #define cbit_word 160 /* [:word:] or \w */
1107     #define cbit_graph 192 /* [:graph:] */
1108     #define cbit_print 224 /* [:print:] */
1109     #define cbit_punct 256 /* [:punct:] */
1110     #define cbit_cntrl 288 /* [:cntrl:] */
1111     #define cbit_length 320 /* Length of the cbits table */
1112    
1113     /* Offsets of the various tables from the base tables pointer, and
1114     total length. */
1115    
1116     #define lcc_offset 0
1117     #define fcc_offset 256
1118     #define cbits_offset 512
1119     #define ctypes_offset (cbits_offset + cbit_length)
1120     #define tables_length (ctypes_offset + 256)
1121    
1122 nigel 87 /* Layout of the UCP type table that translates property names into types and
1123 ph10 240 codes. Each entry used to point directly to a name, but to reduce the number of
1124 ph10 243 relocations in shared libraries, it now has an offset into a single string
1125 ph10 240 instead. */
1126 nigel 77
1127     typedef struct {
1128 ph10 243 pcre_uint16 name_offset;
1129 nigel 87 pcre_uint16 type;
1130     pcre_uint16 value;
1131 nigel 77 } ucp_type_table;
1132    
1133    
1134     /* Internal shared data tables. These are tables that are used by more than one
1135     of the exported public functions. They have to be "external" in the C sense,
1136     but are not part of the PCRE public API. The data for these tables is in the
1137     pcre_tables.c module. */
1138    
1139     extern const int _pcre_utf8_table1[];
1140     extern const int _pcre_utf8_table2[];
1141     extern const int _pcre_utf8_table3[];
1142     extern const uschar _pcre_utf8_table4[];
1143    
1144     extern const int _pcre_utf8_table1_size;
1145    
1146 ph10 240 extern const char _pcre_utt_names[];
1147 nigel 77 extern const ucp_type_table _pcre_utt[];
1148     extern const int _pcre_utt_size;
1149    
1150     extern const uschar _pcre_default_tables[];
1151    
1152     extern const uschar _pcre_OP_lengths[];
1153    
1154    
1155     /* Internal shared functions. These are functions that are used by more than
1156     one of the exported public functions. They have to be "external" in the C
1157     sense, but are not part of the PCRE public API. */
1158    
1159 ph10 150 extern BOOL _pcre_is_newline(const uschar *, int, const uschar *,
1160 ph10 149 int *, BOOL);
1161 nigel 93 extern int _pcre_ord2utf8(int, uschar *);
1162     extern real_pcre *_pcre_try_flipped(const real_pcre *, real_pcre *,
1163     const pcre_study_data *, pcre_study_data *);
1164     extern int _pcre_valid_utf8(const uschar *, int);
1165 ph10 150 extern BOOL _pcre_was_newline(const uschar *, int, const uschar *,
1166 ph10 149 int *, BOOL);
1167 nigel 93 extern BOOL _pcre_xclass(int, const uschar *);
1168 nigel 77
1169 ph10 349
1170     /* Unicode character database (UCD) */
1171    
1172     typedef struct {
1173     uschar script;
1174     uschar chartype;
1175 ph10 351 pcre_int32 other_case;
1176 ph10 349 } ucd_record;
1177    
1178 ph10 351 extern const ucd_record _pcre_ucd_records[];
1179     extern const uschar _pcre_ucd_stage1[];
1180     extern const pcre_uint16 _pcre_ucd_stage2[];
1181     extern const int _pcre_ucp_gentype[];
1182 ph10 349
1183 ph10 351
1184 ph10 349 /* UCD access macros */
1185    
1186     #define UCD_BLOCK_SIZE 128
1187 ph10 351 #define GET_UCD(ch) (_pcre_ucd_records + \
1188     _pcre_ucd_stage2[_pcre_ucd_stage1[(ch) / UCD_BLOCK_SIZE] * \
1189 ph10 349 UCD_BLOCK_SIZE + ch % UCD_BLOCK_SIZE])
1190    
1191     #define UCD_CHARTYPE(ch) GET_UCD(ch)->chartype
1192     #define UCD_SCRIPT(ch) GET_UCD(ch)->script
1193 ph10 351 #define UCD_CATEGORY(ch) _pcre_ucp_gentype[UCD_CHARTYPE(ch)]
1194     #define UCD_OTHERCASE(ch) (ch + GET_UCD(ch)->other_case)
1195 ph10 349
1196 nigel 85 #endif
1197    
1198 nigel 77 /* End of pcre_internal.h */

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