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Revision 376 - (hide annotations) (download)
Sun Mar 1 12:00:59 2009 UTC (5 years, 8 months ago) by ph10
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File size: 47882 byte(s)
Bug fixes: forgot to commit these individually.

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     /* If the pointer is not at the start of a character, move it back until
482 ph10 208 it is. This is called only in UTF-8 mode - we don't put a test within the macro
483 ph10 207 because almost all calls are already within a block of UTF-8 only code. */
484 nigel 77
485 ph10 207 #define BACKCHAR(eptr) while((*eptr & 0xc0) == 0x80) eptr--
486 nigel 77
487     #endif
488    
489    
490     /* In case there is no definition of offsetof() provided - though any proper
491     Standard C system should have one. */
492    
493     #ifndef offsetof
494     #define offsetof(p_type,field) ((size_t)&(((p_type *)0)->field))
495     #endif
496    
497    
498     /* These are the public options that can change during matching. */
499    
500     #define PCRE_IMS (PCRE_CASELESS|PCRE_MULTILINE|PCRE_DOTALL)
501    
502 ph10 231 /* Private flags containing information about the compiled regex. They used to
503     live at the top end of the options word, but that got almost full, so now they
504 ph10 230 are in a 16-bit flags word. */
505 nigel 77
506 ph10 230 #define PCRE_NOPARTIAL 0x0001 /* can't use partial with this regex */
507     #define PCRE_FIRSTSET 0x0002 /* first_byte is set */
508     #define PCRE_REQCHSET 0x0004 /* req_byte is set */
509     #define PCRE_STARTLINE 0x0008 /* start after \n for multiline */
510     #define PCRE_JCHANGED 0x0010 /* j option used in regex */
511     #define PCRE_HASCRORLF 0x0020 /* explicit \r or \n in pattern */
512 nigel 77
513     /* Options for the "extra" block produced by pcre_study(). */
514    
515     #define PCRE_STUDY_MAPPED 0x01 /* a map of starting chars exists */
516    
517     /* Masks for identifying the public options that are permitted at compile
518     time, run time, or study time, respectively. */
519    
520 ph10 149 #define PCRE_NEWLINE_BITS (PCRE_NEWLINE_CR|PCRE_NEWLINE_LF|PCRE_NEWLINE_ANY| \
521     PCRE_NEWLINE_ANYCRLF)
522 nigel 93
523 nigel 77 #define PUBLIC_OPTIONS \
524     (PCRE_CASELESS|PCRE_EXTENDED|PCRE_ANCHORED|PCRE_MULTILINE| \
525     PCRE_DOTALL|PCRE_DOLLAR_ENDONLY|PCRE_EXTRA|PCRE_UNGREEDY|PCRE_UTF8| \
526 nigel 91 PCRE_NO_AUTO_CAPTURE|PCRE_NO_UTF8_CHECK|PCRE_AUTO_CALLOUT|PCRE_FIRSTLINE| \
527 ph10 336 PCRE_DUPNAMES|PCRE_NEWLINE_BITS|PCRE_BSR_ANYCRLF|PCRE_BSR_UNICODE| \
528     PCRE_JAVASCRIPT_COMPAT)
529 nigel 77
530     #define PUBLIC_EXEC_OPTIONS \
531     (PCRE_ANCHORED|PCRE_NOTBOL|PCRE_NOTEOL|PCRE_NOTEMPTY|PCRE_NO_UTF8_CHECK| \
532 ph10 231 PCRE_PARTIAL|PCRE_NEWLINE_BITS|PCRE_BSR_ANYCRLF|PCRE_BSR_UNICODE)
533 nigel 77
534     #define PUBLIC_DFA_EXEC_OPTIONS \
535     (PCRE_ANCHORED|PCRE_NOTBOL|PCRE_NOTEOL|PCRE_NOTEMPTY|PCRE_NO_UTF8_CHECK| \
536 ph10 231 PCRE_PARTIAL|PCRE_DFA_SHORTEST|PCRE_DFA_RESTART|PCRE_NEWLINE_BITS| \
537     PCRE_BSR_ANYCRLF|PCRE_BSR_UNICODE)
538 nigel 77
539     #define PUBLIC_STUDY_OPTIONS 0 /* None defined */
540    
541     /* Magic number to provide a small check against being handed junk. Also used
542     to detect whether a pattern was compiled on a host of different endianness. */
543    
544     #define MAGIC_NUMBER 0x50435245UL /* 'PCRE' */
545    
546     /* Negative values for the firstchar and reqchar variables */
547    
548     #define REQ_UNSET (-2)
549     #define REQ_NONE (-1)
550    
551     /* The maximum remaining length of subject we are prepared to search for a
552     req_byte match. */
553    
554     #define REQ_BYTE_MAX 1000
555    
556     /* Flags added to firstbyte or reqbyte; a "non-literal" item is either a
557     variable-length repeat, or a anything other than literal characters. */
558    
559     #define REQ_CASELESS 0x0100 /* indicates caselessness */
560     #define REQ_VARY 0x0200 /* reqbyte followed non-literal item */
561    
562 ph10 369 /* Miscellaneous definitions. The #ifndef is to pacify compiler warnings in
563 ph10 376 environments where these macros are defined elsewhere. Unfortunately, there
564     is no way to do the same for the typedef. */
565 nigel 77
566     typedef int BOOL;
567    
568 ph10 376 #ifndef FALSE
569 nigel 77 #define FALSE 0
570     #define TRUE 1
571 ph10 369 #endif
572 nigel 77
573 nigel 93 /* Escape items that are just an encoding of a particular data value. */
574 nigel 77
575     #ifndef ESC_e
576     #define ESC_e 27
577     #endif
578    
579     #ifndef ESC_f
580     #define ESC_f '\f'
581     #endif
582    
583     #ifndef ESC_n
584 nigel 93 #define ESC_n '\n'
585 nigel 77 #endif
586    
587     #ifndef ESC_r
588     #define ESC_r '\r'
589     #endif
590    
591     /* We can't officially use ESC_t because it is a POSIX reserved identifier
592     (presumably because of all the others like size_t). */
593    
594     #ifndef ESC_tee
595     #define ESC_tee '\t'
596     #endif
597    
598 nigel 87 /* Codes for different types of Unicode property */
599    
600     #define PT_ANY 0 /* Any property - matches all chars */
601     #define PT_LAMP 1 /* L& - the union of Lu, Ll, Lt */
602     #define PT_GC 2 /* General characteristic (e.g. L) */
603     #define PT_PC 3 /* Particular characteristic (e.g. Lu) */
604     #define PT_SC 4 /* Script (e.g. Han) */
605    
606     /* Flag bits and data types for the extended class (OP_XCLASS) for classes that
607     contain UTF-8 characters with values greater than 255. */
608    
609     #define XCL_NOT 0x01 /* Flag: this is a negative class */
610     #define XCL_MAP 0x02 /* Flag: a 32-byte map is present */
611    
612     #define XCL_END 0 /* Marks end of individual items */
613     #define XCL_SINGLE 1 /* Single item (one multibyte char) follows */
614     #define XCL_RANGE 2 /* A range (two multibyte chars) follows */
615     #define XCL_PROP 3 /* Unicode property (2-byte property code follows) */
616     #define XCL_NOTPROP 4 /* Unicode inverted property (ditto) */
617    
618 nigel 77 /* These are escaped items that aren't just an encoding of a particular data
619     value such as \n. They must have non-zero values, as check_escape() returns
620     their negation. Also, they must appear in the same order as in the opcode
621     definitions below, up to ESC_z. There's a dummy for OP_ANY because it
622 ph10 345 corresponds to "." rather than an escape sequence, and another for OP_ALLANY
623 ph10 341 (which is used for [^] in JavaScript compatibility mode).
624 nigel 77
625 ph10 341 The final escape must be ESC_REF as subsequent values are used for
626     backreferences (\1, \2, \3, etc). There are two tests in the code for an escape
627     greater than ESC_b and less than ESC_Z to detect the types that may be
628     repeated. These are the types that consume characters. If any new escapes are
629     put in between that don't consume a character, that code will have to change.
630     */
631    
632 ph10 172 enum { ESC_A = 1, ESC_G, ESC_K, ESC_B, ESC_b, ESC_D, ESC_d, ESC_S, ESC_s,
633 ph10 345 ESC_W, ESC_w, ESC_dum1, ESC_dum2, ESC_C, ESC_P, ESC_p, ESC_R, ESC_H,
634     ESC_h, ESC_V, ESC_v, ESC_X, ESC_Z, ESC_z, ESC_E, ESC_Q, ESC_g, ESC_k,
635 ph10 341 ESC_REF };
636 nigel 77
637 nigel 93
638 ph10 210 /* Opcode table: Starting from 1 (i.e. after OP_END), the values up to
639 nigel 77 OP_EOD must correspond in order to the list of escapes immediately above.
640    
641 nigel 93 *** NOTE NOTE NOTE *** Whenever this list is updated, the two macro definitions
642     that follow must also be updated to match. There is also a table called
643     "coptable" in pcre_dfa_exec.c that must be updated. */
644    
645 nigel 77 enum {
646     OP_END, /* 0 End of pattern */
647    
648     /* Values corresponding to backslashed metacharacters */
649    
650     OP_SOD, /* 1 Start of data: \A */
651     OP_SOM, /* 2 Start of match (subject + offset): \G */
652 ph10 172 OP_SET_SOM, /* 3 Set start of match (\K) */
653 ph10 168 OP_NOT_WORD_BOUNDARY, /* 4 \B */
654     OP_WORD_BOUNDARY, /* 5 \b */
655     OP_NOT_DIGIT, /* 6 \D */
656     OP_DIGIT, /* 7 \d */
657     OP_NOT_WHITESPACE, /* 8 \S */
658     OP_WHITESPACE, /* 9 \s */
659     OP_NOT_WORDCHAR, /* 10 \W */
660     OP_WORDCHAR, /* 11 \w */
661 ph10 341 OP_ANY, /* 12 Match any character (subject to DOTALL) */
662     OP_ALLANY, /* 13 Match any character (not subject to DOTALL) */
663     OP_ANYBYTE, /* 14 Match any byte (\C); different to OP_ANY for UTF-8 */
664     OP_NOTPROP, /* 15 \P (not Unicode property) */
665     OP_PROP, /* 16 \p (Unicode property) */
666     OP_ANYNL, /* 17 \R (any newline sequence) */
667     OP_NOT_HSPACE, /* 18 \H (not horizontal whitespace) */
668     OP_HSPACE, /* 19 \h (horizontal whitespace) */
669     OP_NOT_VSPACE, /* 20 \V (not vertical whitespace) */
670     OP_VSPACE, /* 21 \v (vertical whitespace) */
671     OP_EXTUNI, /* 22 \X (extended Unicode sequence */
672     OP_EODN, /* 23 End of data or \n at end of data: \Z. */
673     OP_EOD, /* 24 End of data: \z */
674 nigel 77
675 ph10 341 OP_OPT, /* 25 Set runtime options */
676     OP_CIRC, /* 26 Start of line - varies with multiline switch */
677     OP_DOLL, /* 27 End of line - varies with multiline switch */
678     OP_CHAR, /* 28 Match one character, casefully */
679     OP_CHARNC, /* 29 Match one character, caselessly */
680     OP_NOT, /* 30 Match one character, not the following one */
681 nigel 77
682 ph10 341 OP_STAR, /* 31 The maximizing and minimizing versions of */
683     OP_MINSTAR, /* 32 these six opcodes must come in pairs, with */
684     OP_PLUS, /* 33 the minimizing one second. */
685     OP_MINPLUS, /* 34 This first set applies to single characters.*/
686     OP_QUERY, /* 35 */
687     OP_MINQUERY, /* 36 */
688 nigel 77
689 ph10 341 OP_UPTO, /* 37 From 0 to n matches */
690     OP_MINUPTO, /* 38 */
691     OP_EXACT, /* 39 Exactly n matches */
692 nigel 77
693 ph10 341 OP_POSSTAR, /* 40 Possessified star */
694     OP_POSPLUS, /* 41 Possessified plus */
695     OP_POSQUERY, /* 42 Posesssified query */
696     OP_POSUPTO, /* 43 Possessified upto */
697 nigel 77
698 ph10 341 OP_NOTSTAR, /* 44 The maximizing and minimizing versions of */
699     OP_NOTMINSTAR, /* 45 these six opcodes must come in pairs, with */
700     OP_NOTPLUS, /* 46 the minimizing one second. They must be in */
701     OP_NOTMINPLUS, /* 47 exactly the same order as those above. */
702     OP_NOTQUERY, /* 48 This set applies to "not" single characters. */
703     OP_NOTMINQUERY, /* 49 */
704 nigel 77
705 ph10 341 OP_NOTUPTO, /* 50 From 0 to n matches */
706     OP_NOTMINUPTO, /* 51 */
707     OP_NOTEXACT, /* 52 Exactly n matches */
708 nigel 93
709 ph10 341 OP_NOTPOSSTAR, /* 53 Possessified versions */
710     OP_NOTPOSPLUS, /* 54 */
711     OP_NOTPOSQUERY, /* 55 */
712     OP_NOTPOSUPTO, /* 56 */
713 nigel 93
714 ph10 341 OP_TYPESTAR, /* 57 The maximizing and minimizing versions of */
715     OP_TYPEMINSTAR, /* 58 these six opcodes must come in pairs, with */
716     OP_TYPEPLUS, /* 59 the minimizing one second. These codes must */
717     OP_TYPEMINPLUS, /* 60 be in exactly the same order as those above. */
718     OP_TYPEQUERY, /* 61 This set applies to character types such as \d */
719     OP_TYPEMINQUERY, /* 62 */
720 nigel 93
721 ph10 341 OP_TYPEUPTO, /* 63 From 0 to n matches */
722     OP_TYPEMINUPTO, /* 64 */
723     OP_TYPEEXACT, /* 65 Exactly n matches */
724 nigel 93
725 ph10 341 OP_TYPEPOSSTAR, /* 66 Possessified versions */
726     OP_TYPEPOSPLUS, /* 67 */
727     OP_TYPEPOSQUERY, /* 68 */
728     OP_TYPEPOSUPTO, /* 69 */
729 nigel 93
730 ph10 341 OP_CRSTAR, /* 70 The maximizing and minimizing versions of */
731     OP_CRMINSTAR, /* 71 all these opcodes must come in pairs, with */
732     OP_CRPLUS, /* 72 the minimizing one second. These codes must */
733     OP_CRMINPLUS, /* 73 be in exactly the same order as those above. */
734     OP_CRQUERY, /* 74 These are for character classes and back refs */
735     OP_CRMINQUERY, /* 75 */
736     OP_CRRANGE, /* 76 These are different to the three sets above. */
737     OP_CRMINRANGE, /* 77 */
738 nigel 93
739 ph10 341 OP_CLASS, /* 78 Match a character class, chars < 256 only */
740     OP_NCLASS, /* 79 Same, but the bitmap was created from a negative
741 nigel 77 class - the difference is relevant only when a UTF-8
742     character > 255 is encountered. */
743    
744 ph10 341 OP_XCLASS, /* 80 Extended class for handling UTF-8 chars within the
745 nigel 77 class. This does both positive and negative. */
746    
747 ph10 341 OP_REF, /* 81 Match a back reference */
748     OP_RECURSE, /* 82 Match a numbered subpattern (possibly recursive) */
749     OP_CALLOUT, /* 83 Call out to external function if provided */
750 nigel 77
751 ph10 341 OP_ALT, /* 84 Start of alternation */
752     OP_KET, /* 85 End of group that doesn't have an unbounded repeat */
753     OP_KETRMAX, /* 86 These two must remain together and in this */
754     OP_KETRMIN, /* 87 order. They are for groups the repeat for ever. */
755 nigel 77
756 nigel 93 /* The assertions must come before BRA, CBRA, ONCE, and COND.*/
757 nigel 77
758 ph10 341 OP_ASSERT, /* 88 Positive lookahead */
759     OP_ASSERT_NOT, /* 89 Negative lookahead */
760     OP_ASSERTBACK, /* 90 Positive lookbehind */
761     OP_ASSERTBACK_NOT, /* 91 Negative lookbehind */
762     OP_REVERSE, /* 92 Move pointer back - used in lookbehind assertions */
763 nigel 77
764 nigel 93 /* ONCE, BRA, CBRA, and COND must come after the assertions, with ONCE first,
765     as there's a test for >= ONCE for a subpattern that isn't an assertion. */
766 nigel 77
767 ph10 341 OP_ONCE, /* 93 Atomic group */
768     OP_BRA, /* 94 Start of non-capturing bracket */
769     OP_CBRA, /* 95 Start of capturing bracket */
770     OP_COND, /* 96 Conditional group */
771 nigel 77
772 nigel 93 /* These three must follow the previous three, in the same order. There's a
773     check for >= SBRA to distinguish the two sets. */
774 nigel 77
775 ph10 341 OP_SBRA, /* 97 Start of non-capturing bracket, check empty */
776     OP_SCBRA, /* 98 Start of capturing bracket, check empty */
777     OP_SCOND, /* 99 Conditional group, check empty */
778 nigel 77
779 ph10 341 OP_CREF, /* 100 Used to hold a capture number as condition */
780     OP_RREF, /* 101 Used to hold a recursion number as condition */
781     OP_DEF, /* 102 The DEFINE condition */
782 nigel 93
783 ph10 341 OP_BRAZERO, /* 103 These two must remain together and in this */
784     OP_BRAMINZERO, /* 104 order. */
785 ph10 210
786     /* These are backtracking control verbs */
787    
788 ph10 341 OP_PRUNE, /* 105 */
789     OP_SKIP, /* 106 */
790     OP_THEN, /* 107 */
791     OP_COMMIT, /* 108 */
792 ph10 210
793     /* These are forced failure and success verbs */
794    
795 ph10 341 OP_FAIL, /* 109 */
796     OP_ACCEPT, /* 110 */
797 ph10 345
798 ph10 335 /* This is used to skip a subpattern with a {0} quantifier */
799 ph10 345
800 ph10 341 OP_SKIPZERO /* 111 */
801 nigel 77 };
802    
803    
804     /* This macro defines textual names for all the opcodes. These are used only
805     for debugging. The macro is referenced only in pcre_printint.c. */
806    
807     #define OP_NAME_LIST \
808 ph10 168 "End", "\\A", "\\G", "\\K", "\\B", "\\b", "\\D", "\\d", \
809 ph10 341 "\\S", "\\s", "\\W", "\\w", "Any", "AllAny", "Anybyte", \
810 ph10 178 "notprop", "prop", "\\R", "\\H", "\\h", "\\V", "\\v", \
811     "extuni", "\\Z", "\\z", \
812 nigel 77 "Opt", "^", "$", "char", "charnc", "not", \
813     "*", "*?", "+", "+?", "?", "??", "{", "{", "{", \
814 nigel 93 "*+","++", "?+", "{", \
815 nigel 77 "*", "*?", "+", "+?", "?", "??", "{", "{", "{", \
816 nigel 93 "*+","++", "?+", "{", \
817 nigel 77 "*", "*?", "+", "+?", "?", "??", "{", "{", "{", \
818 nigel 93 "*+","++", "?+", "{", \
819 nigel 77 "*", "*?", "+", "+?", "?", "??", "{", "{", \
820     "class", "nclass", "xclass", "Ref", "Recurse", "Callout", \
821     "Alt", "Ket", "KetRmax", "KetRmin", "Assert", "Assert not", \
822 nigel 93 "AssertB", "AssertB not", "Reverse", \
823 ph10 192 "Once", "Bra", "CBra", "Cond", "SBra", "SCBra", "SCond", \
824 ph10 210 "Cond ref", "Cond rec", "Cond def", "Brazero", "Braminzero", \
825 ph10 335 "*PRUNE", "*SKIP", "*THEN", "*COMMIT", "*FAIL", "*ACCEPT", \
826 ph10 345 "Skip zero"
827 nigel 77
828    
829     /* This macro defines the length of fixed length operations in the compiled
830     regex. The lengths are used when searching for specific things, and also in the
831     debugging printing of a compiled regex. We use a macro so that it can be
832     defined close to the definitions of the opcodes themselves.
833    
834     As things have been extended, some of these are no longer fixed lenths, but are
835     minima instead. For example, the length of a single-character repeat may vary
836     in UTF-8 mode. The code that uses this table must know about such things. */
837    
838     #define OP_LENGTHS \
839     1, /* End */ \
840 ph10 168 1, 1, 1, 1, 1, /* \A, \G, \K, \B, \b */ \
841     1, 1, 1, 1, 1, 1, /* \D, \d, \S, \s, \W, \w */ \
842 ph10 341 1, 1, 1, /* Any, AllAny, Anybyte */ \
843 ph10 178 3, 3, 1, /* NOTPROP, PROP, EXTUNI */ \
844     1, 1, 1, 1, 1, /* \R, \H, \h, \V, \v */ \
845 nigel 77 1, 1, 2, 1, 1, /* \Z, \z, Opt, ^, $ */ \
846     2, /* Char - the minimum length */ \
847     2, /* Charnc - the minimum length */ \
848     2, /* not */ \
849     /* Positive single-char repeats ** These are */ \
850     2, 2, 2, 2, 2, 2, /* *, *?, +, +?, ?, ?? ** minima in */ \
851     4, 4, 4, /* upto, minupto, exact ** UTF-8 mode */ \
852 nigel 93 2, 2, 2, 4, /* *+, ++, ?+, upto+ */ \
853 nigel 77 /* Negative single-char repeats - only for chars < 256 */ \
854     2, 2, 2, 2, 2, 2, /* NOT *, *?, +, +?, ?, ?? */ \
855     4, 4, 4, /* NOT upto, minupto, exact */ \
856 nigel 93 2, 2, 2, 4, /* Possessive *, +, ?, upto */ \
857 nigel 77 /* Positive type repeats */ \
858     2, 2, 2, 2, 2, 2, /* Type *, *?, +, +?, ?, ?? */ \
859     4, 4, 4, /* Type upto, minupto, exact */ \
860 nigel 93 2, 2, 2, 4, /* Possessive *+, ++, ?+, upto+ */ \
861 nigel 77 /* Character class & ref repeats */ \
862     1, 1, 1, 1, 1, 1, /* *, *?, +, +?, ?, ?? */ \
863     5, 5, /* CRRANGE, CRMINRANGE */ \
864     33, /* CLASS */ \
865     33, /* NCLASS */ \
866     0, /* XCLASS - variable length */ \
867     3, /* REF */ \
868     1+LINK_SIZE, /* RECURSE */ \
869     2+2*LINK_SIZE, /* CALLOUT */ \
870     1+LINK_SIZE, /* Alt */ \
871     1+LINK_SIZE, /* Ket */ \
872     1+LINK_SIZE, /* KetRmax */ \
873     1+LINK_SIZE, /* KetRmin */ \
874     1+LINK_SIZE, /* Assert */ \
875     1+LINK_SIZE, /* Assert not */ \
876     1+LINK_SIZE, /* Assert behind */ \
877     1+LINK_SIZE, /* Assert behind not */ \
878     1+LINK_SIZE, /* Reverse */ \
879 nigel 93 1+LINK_SIZE, /* ONCE */ \
880     1+LINK_SIZE, /* BRA */ \
881     3+LINK_SIZE, /* CBRA */ \
882 nigel 77 1+LINK_SIZE, /* COND */ \
883 nigel 93 1+LINK_SIZE, /* SBRA */ \
884     3+LINK_SIZE, /* SCBRA */ \
885     1+LINK_SIZE, /* SCOND */ \
886 nigel 77 3, /* CREF */ \
887 nigel 93 3, /* RREF */ \
888     1, /* DEF */ \
889 nigel 77 1, 1, /* BRAZERO, BRAMINZERO */ \
890 ph10 210 1, 1, 1, 1, /* PRUNE, SKIP, THEN, COMMIT, */ \
891 ph10 335 1, 1, 1 /* FAIL, ACCEPT, SKIPZERO */
892 nigel 77
893    
894 nigel 93 /* A magic value for OP_RREF to indicate the "any recursion" condition. */
895 nigel 77
896 nigel 93 #define RREF_ANY 0xffff
897 nigel 77
898     /* Error code numbers. They are given names so that they can more easily be
899     tracked. */
900    
901     enum { ERR0, ERR1, ERR2, ERR3, ERR4, ERR5, ERR6, ERR7, ERR8, ERR9,
902     ERR10, ERR11, ERR12, ERR13, ERR14, ERR15, ERR16, ERR17, ERR18, ERR19,
903     ERR20, ERR21, ERR22, ERR23, ERR24, ERR25, ERR26, ERR27, ERR28, ERR29,
904     ERR30, ERR31, ERR32, ERR33, ERR34, ERR35, ERR36, ERR37, ERR38, ERR39,
905 nigel 91 ERR40, ERR41, ERR42, ERR43, ERR44, ERR45, ERR46, ERR47, ERR48, ERR49,
906 ph10 210 ERR50, ERR51, ERR52, ERR53, ERR54, ERR55, ERR56, ERR57, ERR58, ERR59,
907 ph10 336 ERR60, ERR61, ERR62, ERR63, ERR64 };
908 nigel 77
909     /* The real format of the start of the pcre block; the index of names and the
910     code vector run on as long as necessary after the end. We store an explicit
911     offset to the name table so that if a regex is compiled on one host, saved, and
912     then run on another where the size of pointers is different, all might still
913     be well. For the case of compiled-on-4 and run-on-8, we include an extra
914     pointer that is always NULL. For future-proofing, a few dummy fields were
915     originally included - even though you can never get this planning right - but
916     there is only one left now.
917    
918     NOTE NOTE NOTE:
919     Because people can now save and re-use compiled patterns, any additions to this
920     structure should be made at the end, and something earlier (e.g. a new
921     flag in the options or one of the dummy fields) should indicate that the new
922     fields are present. Currently PCRE always sets the dummy fields to zero.
923     NOTE NOTE NOTE:
924     */
925    
926     typedef struct real_pcre {
927     pcre_uint32 magic_number;
928     pcre_uint32 size; /* Total that was malloced */
929 ph10 230 pcre_uint32 options; /* Public options */
930     pcre_uint16 flags; /* Private flags */
931     pcre_uint16 dummy1; /* For future use */
932 nigel 77 pcre_uint16 top_bracket;
933     pcre_uint16 top_backref;
934     pcre_uint16 first_byte;
935     pcre_uint16 req_byte;
936     pcre_uint16 name_table_offset; /* Offset to name table that follows */
937     pcre_uint16 name_entry_size; /* Size of any name items */
938     pcre_uint16 name_count; /* Number of name items */
939     pcre_uint16 ref_count; /* Reference count */
940    
941     const unsigned char *tables; /* Pointer to tables or NULL for std */
942     const unsigned char *nullpad; /* NULL padding */
943     } real_pcre;
944    
945     /* The format of the block used to store data from pcre_study(). The same
946     remark (see NOTE above) about extending this structure applies. */
947    
948     typedef struct pcre_study_data {
949     pcre_uint32 size; /* Total that was malloced */
950     pcre_uint32 options;
951     uschar start_bits[32];
952     } pcre_study_data;
953    
954     /* Structure for passing "static" information around between the functions
955     doing the compiling, so that they are thread-safe. */
956    
957     typedef struct compile_data {
958     const uschar *lcc; /* Points to lower casing table */
959     const uschar *fcc; /* Points to case-flipping table */
960     const uschar *cbits; /* Points to character type table */
961     const uschar *ctypes; /* Points to table of type maps */
962 nigel 93 const uschar *start_workspace;/* The start of working space */
963 nigel 77 const uschar *start_code; /* The start of the compiled code */
964     const uschar *start_pattern; /* The start of the pattern */
965 nigel 93 const uschar *end_pattern; /* The end of the pattern */
966     uschar *hwm; /* High watermark of workspace */
967 nigel 77 uschar *name_table; /* The name/number table */
968     int names_found; /* Number of entries so far */
969     int name_entry_size; /* Size of each entry */
970 ph10 270 int bracount; /* Count of capturing parens as we compile */
971 ph10 286 int final_bracount; /* Saved value after first pass */
972 nigel 77 int top_backref; /* Maximum back reference */
973     unsigned int backref_map; /* Bitmap of low back refs */
974 nigel 93 int external_options; /* External (initial) options */
975 ph10 231 int external_flags; /* External flag bits to be set */
976 nigel 77 int req_varyopt; /* "After variable item" flag for reqbyte */
977 ph10 211 BOOL had_accept; /* (*ACCEPT) encountered */
978 nigel 93 int nltype; /* Newline type */
979     int nllen; /* Newline string length */
980     uschar nl[4]; /* Newline string when fixed length */
981 nigel 77 } compile_data;
982    
983     /* Structure for maintaining a chain of pointers to the currently incomplete
984     branches, for testing for left recursion. */
985    
986     typedef struct branch_chain {
987     struct branch_chain *outer;
988     uschar *current;
989     } branch_chain;
990    
991     /* Structure for items in a linked list that represents an explicit recursive
992     call within the pattern. */
993    
994     typedef struct recursion_info {
995     struct recursion_info *prevrec; /* Previous recursion record (or NULL) */
996     int group_num; /* Number of group that was called */
997     const uschar *after_call; /* "Return value": points after the call in the expr */
998 ph10 168 USPTR save_start; /* Old value of mstart */
999 nigel 77 int *offset_save; /* Pointer to start of saved offsets */
1000     int saved_max; /* Number of saved offsets */
1001     } recursion_info;
1002    
1003 nigel 93 /* Structure for building a chain of data for holding the values of the subject
1004     pointer at the start of each subpattern, so as to detect when an empty string
1005     has been matched by a subpattern - to break infinite loops. */
1006    
1007     typedef struct eptrblock {
1008     struct eptrblock *epb_prev;
1009     USPTR epb_saved_eptr;
1010     } eptrblock;
1011    
1012    
1013 nigel 77 /* Structure for passing "static" information around between the functions
1014     doing traditional NFA matching, so that they are thread-safe. */
1015    
1016     typedef struct match_data {
1017 nigel 87 unsigned long int match_call_count; /* As it says */
1018     unsigned long int match_limit; /* As it says */
1019     unsigned long int match_limit_recursion; /* As it says */
1020 nigel 77 int *offset_vector; /* Offset vector */
1021     int offset_end; /* One past the end */
1022     int offset_max; /* The maximum usable for return data */
1023 nigel 93 int nltype; /* Newline type */
1024     int nllen; /* Newline string length */
1025     uschar nl[4]; /* Newline string when fixed */
1026 nigel 77 const uschar *lcc; /* Points to lower casing table */
1027     const uschar *ctypes; /* Points to table of type maps */
1028     BOOL offset_overflow; /* Set if too many extractions */
1029     BOOL notbol; /* NOTBOL flag */
1030     BOOL noteol; /* NOTEOL flag */
1031     BOOL utf8; /* UTF8 flag */
1032 ph10 345 BOOL jscript_compat; /* JAVASCRIPT_COMPAT flag */
1033 nigel 77 BOOL endonly; /* Dollar not before final \n */
1034     BOOL notempty; /* Empty string match not wanted */
1035     BOOL partial; /* PARTIAL flag */
1036     BOOL hitend; /* Hit the end of the subject at some point */
1037 ph10 231 BOOL bsr_anycrlf; /* \R is just any CRLF, not full Unicode */
1038 nigel 77 const uschar *start_code; /* For use when recursing */
1039 nigel 87 USPTR start_subject; /* Start of the subject string */
1040     USPTR end_subject; /* End of the subject string */
1041 ph10 168 USPTR start_match_ptr; /* Start of matched string */
1042 nigel 87 USPTR end_match_ptr; /* Subject position at end match */
1043 nigel 77 int end_offset_top; /* Highwater mark at end of match */
1044     int capture_last; /* Most recent capture number */
1045     int start_offset; /* The start offset value */
1046 nigel 93 eptrblock *eptrchain; /* Chain of eptrblocks for tail recursions */
1047     int eptrn; /* Next free eptrblock */
1048 nigel 77 recursion_info *recursive; /* Linked list of recursion data */
1049     void *callout_data; /* To pass back to callouts */
1050     } match_data;
1051    
1052     /* A similar structure is used for the same purpose by the DFA matching
1053     functions. */
1054    
1055     typedef struct dfa_match_data {
1056     const uschar *start_code; /* Start of the compiled pattern */
1057     const uschar *start_subject; /* Start of the subject string */
1058     const uschar *end_subject; /* End of subject string */
1059     const uschar *tables; /* Character tables */
1060     int moptions; /* Match options */
1061     int poptions; /* Pattern options */
1062 nigel 93 int nltype; /* Newline type */
1063     int nllen; /* Newline string length */
1064     uschar nl[4]; /* Newline string when fixed */
1065 nigel 77 void *callout_data; /* To pass back to callouts */
1066     } dfa_match_data;
1067    
1068     /* Bit definitions for entries in the pcre_ctypes table. */
1069    
1070     #define ctype_space 0x01
1071     #define ctype_letter 0x02
1072     #define ctype_digit 0x04
1073     #define ctype_xdigit 0x08
1074 ph10 274 #define ctype_word 0x10 /* alphanumeric or '_' */
1075 nigel 77 #define ctype_meta 0x80 /* regexp meta char or zero (end pattern) */
1076    
1077     /* Offsets for the bitmap tables in pcre_cbits. Each table contains a set
1078     of bits for a class map. Some classes are built by combining these tables. */
1079    
1080     #define cbit_space 0 /* [:space:] or \s */
1081     #define cbit_xdigit 32 /* [:xdigit:] */
1082     #define cbit_digit 64 /* [:digit:] or \d */
1083     #define cbit_upper 96 /* [:upper:] */
1084     #define cbit_lower 128 /* [:lower:] */
1085     #define cbit_word 160 /* [:word:] or \w */
1086     #define cbit_graph 192 /* [:graph:] */
1087     #define cbit_print 224 /* [:print:] */
1088     #define cbit_punct 256 /* [:punct:] */
1089     #define cbit_cntrl 288 /* [:cntrl:] */
1090     #define cbit_length 320 /* Length of the cbits table */
1091    
1092     /* Offsets of the various tables from the base tables pointer, and
1093     total length. */
1094    
1095     #define lcc_offset 0
1096     #define fcc_offset 256
1097     #define cbits_offset 512
1098     #define ctypes_offset (cbits_offset + cbit_length)
1099     #define tables_length (ctypes_offset + 256)
1100    
1101 nigel 87 /* Layout of the UCP type table that translates property names into types and
1102 ph10 240 codes. Each entry used to point directly to a name, but to reduce the number of
1103 ph10 243 relocations in shared libraries, it now has an offset into a single string
1104 ph10 240 instead. */
1105 nigel 77
1106     typedef struct {
1107 ph10 243 pcre_uint16 name_offset;
1108 nigel 87 pcre_uint16 type;
1109     pcre_uint16 value;
1110 nigel 77 } ucp_type_table;
1111    
1112    
1113     /* Internal shared data tables. These are tables that are used by more than one
1114     of the exported public functions. They have to be "external" in the C sense,
1115     but are not part of the PCRE public API. The data for these tables is in the
1116     pcre_tables.c module. */
1117    
1118     extern const int _pcre_utf8_table1[];
1119     extern const int _pcre_utf8_table2[];
1120     extern const int _pcre_utf8_table3[];
1121     extern const uschar _pcre_utf8_table4[];
1122    
1123     extern const int _pcre_utf8_table1_size;
1124    
1125 ph10 240 extern const char _pcre_utt_names[];
1126 nigel 77 extern const ucp_type_table _pcre_utt[];
1127     extern const int _pcre_utt_size;
1128    
1129     extern const uschar _pcre_default_tables[];
1130    
1131     extern const uschar _pcre_OP_lengths[];
1132    
1133    
1134     /* Internal shared functions. These are functions that are used by more than
1135     one of the exported public functions. They have to be "external" in the C
1136     sense, but are not part of the PCRE public API. */
1137    
1138 ph10 150 extern BOOL _pcre_is_newline(const uschar *, int, const uschar *,
1139 ph10 149 int *, BOOL);
1140 nigel 93 extern int _pcre_ord2utf8(int, uschar *);
1141     extern real_pcre *_pcre_try_flipped(const real_pcre *, real_pcre *,
1142     const pcre_study_data *, pcre_study_data *);
1143     extern int _pcre_valid_utf8(const uschar *, int);
1144 ph10 150 extern BOOL _pcre_was_newline(const uschar *, int, const uschar *,
1145 ph10 149 int *, BOOL);
1146 nigel 93 extern BOOL _pcre_xclass(int, const uschar *);
1147 nigel 77
1148 ph10 349
1149     /* Unicode character database (UCD) */
1150    
1151     typedef struct {
1152     uschar script;
1153     uschar chartype;
1154 ph10 351 pcre_int32 other_case;
1155 ph10 349 } ucd_record;
1156    
1157 ph10 351 extern const ucd_record _pcre_ucd_records[];
1158     extern const uschar _pcre_ucd_stage1[];
1159     extern const pcre_uint16 _pcre_ucd_stage2[];
1160     extern const int _pcre_ucp_gentype[];
1161 ph10 349
1162 ph10 351
1163 ph10 349 /* UCD access macros */
1164    
1165     #define UCD_BLOCK_SIZE 128
1166 ph10 351 #define GET_UCD(ch) (_pcre_ucd_records + \
1167     _pcre_ucd_stage2[_pcre_ucd_stage1[(ch) / UCD_BLOCK_SIZE] * \
1168 ph10 349 UCD_BLOCK_SIZE + ch % UCD_BLOCK_SIZE])
1169    
1170     #define UCD_CHARTYPE(ch) GET_UCD(ch)->chartype
1171     #define UCD_SCRIPT(ch) GET_UCD(ch)->script
1172 ph10 351 #define UCD_CATEGORY(ch) _pcre_ucp_gentype[UCD_CHARTYPE(ch)]
1173     #define UCD_OTHERCASE(ch) (ch + GET_UCD(ch)->other_case)
1174 ph10 349
1175 nigel 85 #endif
1176    
1177 nigel 77 /* End of pcre_internal.h */

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