/[pcre]/code/trunk/pcre_internal.h
ViewVC logotype

Contents of /code/trunk/pcre_internal.h

Parent Directory Parent Directory | Revision Log Revision Log


Revision 230 - (hide annotations) (download)
Mon Sep 10 13:23:56 2007 UTC (6 years, 10 months ago) by ph10
File MIME type: text/plain
File size: 45546 byte(s)
(1) Move internal flags out of the options field, to make room.
(2) \r and \n must be explicit to trigger the special CRLF handline exception.
(3) (?J) at the start now sets JCHANGED as well as DUPNAMES.

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 117 Copyright (c) 1997-2007 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     /* We need to have types that specify unsigned 16-bit and 32-bit integers. We
136     cannot determine these outside the compilation (e.g. by running a program as
137     part of "configure") because PCRE is often cross-compiled for use on other
138     systems. Instead we make use of the maximum sizes that are available at
139     preprocessor time in standard C environments. */
140    
141     #if USHRT_MAX == 65535
142     typedef unsigned short pcre_uint16;
143     #elif UINT_MAX == 65535
144     typedef unsigned int pcre_uint16;
145     #else
146     #error Cannot determine a type for 16-bit unsigned integers
147     #endif
148    
149     #if UINT_MAX == 4294967295
150     typedef unsigned int pcre_uint32;
151     #elif ULONG_MAX == 4294967295
152     typedef unsigned long int pcre_uint32;
153     #else
154     #error Cannot determine a type for 32-bit unsigned integers
155     #endif
156    
157     /* All character handling must be done as unsigned characters. Otherwise there
158     are problems with top-bit-set characters and functions such as isspace().
159     However, we leave the interface to the outside world as char *, because that
160     should make things easier for callers. We define a short type for unsigned char
161     to save lots of typing. I tried "uchar", but it causes problems on Digital
162     Unix, where it is defined in sys/types, so use "uschar" instead. */
163    
164     typedef unsigned char uschar;
165    
166 nigel 93 /* This is an unsigned int value that no character can ever have. UTF-8
167     characters only go up to 0x7fffffff (though Unicode doesn't go beyond
168     0x0010ffff). */
169 nigel 91
170 nigel 93 #define NOTACHAR 0xffffffff
171    
172     /* PCRE is able to support several different kinds of newline (CR, LF, CRLF,
173 ph10 149 "any" and "anycrlf" at present). The following macros are used to package up
174     testing for newlines. NLBLOCK, PSSTART, and PSEND are defined in the various
175     modules to indicate in which datablock the parameters exist, and what the
176     start/end of string field names are. */
177 nigel 93
178 ph10 149 #define NLTYPE_FIXED 0 /* Newline is a fixed length string */
179     #define NLTYPE_ANY 1 /* Newline is any Unicode line ending */
180     #define NLTYPE_ANYCRLF 2 /* Newline is CR, LF, or CRLF */
181 nigel 93
182     /* This macro checks for a newline at the given position */
183    
184 nigel 91 #define IS_NEWLINE(p) \
185 nigel 93 ((NLBLOCK->nltype != NLTYPE_FIXED)? \
186     ((p) < NLBLOCK->PSEND && \
187 ph10 149 _pcre_is_newline((p), NLBLOCK->nltype, NLBLOCK->PSEND, &(NLBLOCK->nllen),\
188     utf8)) \
189 nigel 93 : \
190     ((p) <= NLBLOCK->PSEND - NLBLOCK->nllen && \
191     (p)[0] == NLBLOCK->nl[0] && \
192     (NLBLOCK->nllen == 1 || (p)[1] == NLBLOCK->nl[1]) \
193     ) \
194     )
195 nigel 91
196 nigel 93 /* This macro checks for a newline immediately preceding the given position */
197    
198     #define WAS_NEWLINE(p) \
199     ((NLBLOCK->nltype != NLTYPE_FIXED)? \
200     ((p) > NLBLOCK->PSSTART && \
201 ph10 149 _pcre_was_newline((p), NLBLOCK->nltype, NLBLOCK->PSSTART, \
202     &(NLBLOCK->nllen), utf8)) \
203 nigel 93 : \
204     ((p) >= NLBLOCK->PSSTART + NLBLOCK->nllen && \
205     (p)[-NLBLOCK->nllen] == NLBLOCK->nl[0] && \
206     (NLBLOCK->nllen == 1 || (p)[-NLBLOCK->nllen+1] == NLBLOCK->nl[1]) \
207     ) \
208     )
209    
210 nigel 87 /* When PCRE is compiled as a C++ library, the subject pointer can be replaced
211     with a custom type. This makes it possible, for example, to allow pcre_exec()
212     to process subject strings that are discontinuous by using a smart pointer
213     class. It must always be possible to inspect all of the subject string in
214     pcre_exec() because of the way it backtracks. Two macros are required in the
215     normal case, for sign-unspecified and unsigned char pointers. The former is
216     used for the external interface and appears in pcre.h, which is why its name
217     must begin with PCRE_. */
218    
219     #ifdef CUSTOM_SUBJECT_PTR
220     #define PCRE_SPTR CUSTOM_SUBJECT_PTR
221     #define USPTR CUSTOM_SUBJECT_PTR
222     #else
223     #define PCRE_SPTR const char *
224     #define USPTR const unsigned char *
225     #endif
226    
227 ph10 145
228    
229 nigel 85 /* Include the public PCRE header and the definitions of UCP character property
230     values. */
231 nigel 77
232 ph10 189 #include "pcre.h"
233 nigel 77 #include "ucp.h"
234    
235     /* When compiling for use with the Virtual Pascal compiler, these functions
236     need to have their names changed. PCRE must be compiled with the -DVPCOMPAT
237     option on the command line. */
238    
239     #ifdef VPCOMPAT
240 ph10 101 #define strlen(s) _strlen(s)
241 nigel 77 #define strncmp(s1,s2,m) _strncmp(s1,s2,m)
242 ph10 101 #define memcmp(s,c,n) _memcmp(s,c,n)
243 nigel 77 #define memcpy(d,s,n) _memcpy(d,s,n)
244     #define memmove(d,s,n) _memmove(d,s,n)
245     #define memset(s,c,n) _memset(s,c,n)
246     #else /* VPCOMPAT */
247    
248     /* To cope with SunOS4 and other systems that lack memmove() but have bcopy(),
249     define a macro for memmove() if HAVE_MEMMOVE is false, provided that HAVE_BCOPY
250     is set. Otherwise, include an emulating function for those systems that have
251 ph10 118 neither (there some non-Unix environments where this is the case). */
252 nigel 77
253 ph10 137 #ifndef HAVE_MEMMOVE
254 nigel 77 #undef memmove /* some systems may have a macro */
255 ph10 137 #ifdef HAVE_BCOPY
256 nigel 77 #define memmove(a, b, c) bcopy(b, a, c)
257     #else /* HAVE_BCOPY */
258 nigel 91 static void *
259 ph10 108 pcre_memmove(void *d, const void *s, size_t n)
260 nigel 77 {
261 nigel 87 size_t i;
262 ph10 108 unsigned char *dest = (unsigned char *)d;
263     const unsigned char *src = (const unsigned char *)s;
264 ph10 118 if (dest > src)
265     {
266     dest += n;
267     src += n;
268     for (i = 0; i < n; ++i) *(--dest) = *(--src);
269     return (void *)dest;
270     }
271     else
272     {
273     for (i = 0; i < n; ++i) *dest++ = *src++;
274 ph10 123 return (void *)(dest - n);
275     }
276 nigel 77 }
277     #define memmove(a, b, c) pcre_memmove(a, b, c)
278     #endif /* not HAVE_BCOPY */
279     #endif /* not HAVE_MEMMOVE */
280     #endif /* not VPCOMPAT */
281    
282    
283     /* PCRE keeps offsets in its compiled code as 2-byte quantities (always stored
284     in big-endian order) by default. These are used, for example, to link from the
285     start of a subpattern to its alternatives and its end. The use of 2 bytes per
286     offset limits the size of the compiled regex to around 64K, which is big enough
287     for almost everybody. However, I received a request for an even bigger limit.
288     For this reason, and also to make the code easier to maintain, the storing and
289     loading of offsets from the byte string is now handled by the macros that are
290     defined here.
291    
292     The macros are controlled by the value of LINK_SIZE. This defaults to 2 in
293     the config.h file, but can be overridden by using -D on the command line. This
294     is automated on Unix systems via the "configure" command. */
295    
296     #if LINK_SIZE == 2
297    
298     #define PUT(a,n,d) \
299     (a[n] = (d) >> 8), \
300     (a[(n)+1] = (d) & 255)
301    
302     #define GET(a,n) \
303     (((a)[n] << 8) | (a)[(n)+1])
304    
305     #define MAX_PATTERN_SIZE (1 << 16)
306    
307    
308     #elif LINK_SIZE == 3
309    
310     #define PUT(a,n,d) \
311     (a[n] = (d) >> 16), \
312     (a[(n)+1] = (d) >> 8), \
313     (a[(n)+2] = (d) & 255)
314    
315     #define GET(a,n) \
316     (((a)[n] << 16) | ((a)[(n)+1] << 8) | (a)[(n)+2])
317    
318     #define MAX_PATTERN_SIZE (1 << 24)
319    
320    
321     #elif LINK_SIZE == 4
322    
323     #define PUT(a,n,d) \
324     (a[n] = (d) >> 24), \
325     (a[(n)+1] = (d) >> 16), \
326     (a[(n)+2] = (d) >> 8), \
327     (a[(n)+3] = (d) & 255)
328    
329     #define GET(a,n) \
330     (((a)[n] << 24) | ((a)[(n)+1] << 16) | ((a)[(n)+2] << 8) | (a)[(n)+3])
331    
332     #define MAX_PATTERN_SIZE (1 << 30) /* Keep it positive */
333    
334    
335     #else
336     #error LINK_SIZE must be either 2, 3, or 4
337     #endif
338    
339    
340     /* Convenience macro defined in terms of the others */
341    
342     #define PUTINC(a,n,d) PUT(a,n,d), a += LINK_SIZE
343    
344    
345     /* PCRE uses some other 2-byte quantities that do not change when the size of
346     offsets changes. There are used for repeat counts and for other things such as
347     capturing parenthesis numbers in back references. */
348    
349     #define PUT2(a,n,d) \
350     a[n] = (d) >> 8; \
351     a[(n)+1] = (d) & 255
352    
353     #define GET2(a,n) \
354     (((a)[n] << 8) | (a)[(n)+1])
355    
356     #define PUT2INC(a,n,d) PUT2(a,n,d), a += 2
357    
358    
359     /* When UTF-8 encoding is being used, a character is no longer just a single
360     byte. The macros for character handling generate simple sequences when used in
361 ph10 208 byte-mode, and more complicated ones for UTF-8 characters. BACKCHAR should
362     never be called in byte mode. To make sure it can never even appear when UTF-8
363 ph10 207 support is omitted, we don't even define it. */
364 nigel 77
365     #ifndef SUPPORT_UTF8
366     #define GETCHAR(c, eptr) c = *eptr;
367     #define GETCHARTEST(c, eptr) c = *eptr;
368     #define GETCHARINC(c, eptr) c = *eptr++;
369     #define GETCHARINCTEST(c, eptr) c = *eptr++;
370     #define GETCHARLEN(c, eptr, len) c = *eptr;
371 ph10 207 /* #define BACKCHAR(eptr) */
372 nigel 77
373     #else /* SUPPORT_UTF8 */
374    
375     /* Get the next UTF-8 character, not advancing the pointer. This is called when
376     we know we are in UTF-8 mode. */
377    
378     #define GETCHAR(c, eptr) \
379     c = *eptr; \
380 nigel 93 if (c >= 0xc0) \
381 nigel 77 { \
382     int gcii; \
383     int gcaa = _pcre_utf8_table4[c & 0x3f]; /* Number of additional bytes */ \
384     int gcss = 6*gcaa; \
385     c = (c & _pcre_utf8_table3[gcaa]) << gcss; \
386     for (gcii = 1; gcii <= gcaa; gcii++) \
387     { \
388     gcss -= 6; \
389     c |= (eptr[gcii] & 0x3f) << gcss; \
390     } \
391     }
392    
393     /* Get the next UTF-8 character, testing for UTF-8 mode, and not advancing the
394     pointer. */
395    
396     #define GETCHARTEST(c, eptr) \
397     c = *eptr; \
398 nigel 93 if (utf8 && 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, advancing the pointer. This is called when we
412     know we are in UTF-8 mode. */
413    
414     #define GETCHARINC(c, eptr) \
415     c = *eptr++; \
416 nigel 93 if (c >= 0xc0) \
417 nigel 77 { \
418     int gcaa = _pcre_utf8_table4[c & 0x3f]; /* Number of additional bytes */ \
419     int gcss = 6*gcaa; \
420     c = (c & _pcre_utf8_table3[gcaa]) << gcss; \
421     while (gcaa-- > 0) \
422     { \
423     gcss -= 6; \
424     c |= (*eptr++ & 0x3f) << gcss; \
425     } \
426     }
427    
428     /* Get the next character, testing for UTF-8 mode, and advancing the pointer */
429    
430     #define GETCHARINCTEST(c, eptr) \
431     c = *eptr++; \
432 nigel 93 if (utf8 && c >= 0xc0) \
433 nigel 77 { \
434     int gcaa = _pcre_utf8_table4[c & 0x3f]; /* Number of additional bytes */ \
435     int gcss = 6*gcaa; \
436     c = (c & _pcre_utf8_table3[gcaa]) << gcss; \
437     while (gcaa-- > 0) \
438     { \
439     gcss -= 6; \
440     c |= (*eptr++ & 0x3f) << gcss; \
441     } \
442     }
443    
444     /* Get the next UTF-8 character, not advancing the pointer, incrementing length
445     if there are extra bytes. This is called when we know we are in UTF-8 mode. */
446    
447     #define GETCHARLEN(c, eptr, len) \
448     c = *eptr; \
449 nigel 93 if (c >= 0xc0) \
450 nigel 77 { \
451     int gcii; \
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     for (gcii = 1; gcii <= gcaa; gcii++) \
456     { \
457     gcss -= 6; \
458     c |= (eptr[gcii] & 0x3f) << gcss; \
459     } \
460     len += gcaa; \
461     }
462    
463     /* If the pointer is not at the start of a character, move it back until
464 ph10 208 it is. This is called only in UTF-8 mode - we don't put a test within the macro
465 ph10 207 because almost all calls are already within a block of UTF-8 only code. */
466 nigel 77
467 ph10 207 #define BACKCHAR(eptr) while((*eptr & 0xc0) == 0x80) eptr--
468 nigel 77
469     #endif
470    
471    
472     /* In case there is no definition of offsetof() provided - though any proper
473     Standard C system should have one. */
474    
475     #ifndef offsetof
476     #define offsetof(p_type,field) ((size_t)&(((p_type *)0)->field))
477     #endif
478    
479    
480     /* These are the public options that can change during matching. */
481    
482     #define PCRE_IMS (PCRE_CASELESS|PCRE_MULTILINE|PCRE_DOTALL)
483    
484 ph10 230 /* Private flags containing information about the compiled regex. They used to
485     live at the top end of the options word, but that got almost full, so now they
486     are in a 16-bit flags word. */
487 nigel 77
488 ph10 230 #define PCRE_NOPARTIAL 0x0001 /* can't use partial with this regex */
489     #define PCRE_FIRSTSET 0x0002 /* first_byte is set */
490     #define PCRE_REQCHSET 0x0004 /* req_byte is set */
491     #define PCRE_STARTLINE 0x0008 /* start after \n for multiline */
492     #define PCRE_JCHANGED 0x0010 /* j option used in regex */
493     #define PCRE_HASCRORLF 0x0020 /* explicit \r or \n in pattern */
494 nigel 77
495     /* Options for the "extra" block produced by pcre_study(). */
496    
497     #define PCRE_STUDY_MAPPED 0x01 /* a map of starting chars exists */
498    
499     /* Masks for identifying the public options that are permitted at compile
500     time, run time, or study time, respectively. */
501    
502 ph10 149 #define PCRE_NEWLINE_BITS (PCRE_NEWLINE_CR|PCRE_NEWLINE_LF|PCRE_NEWLINE_ANY| \
503     PCRE_NEWLINE_ANYCRLF)
504 nigel 93
505 nigel 77 #define PUBLIC_OPTIONS \
506     (PCRE_CASELESS|PCRE_EXTENDED|PCRE_ANCHORED|PCRE_MULTILINE| \
507     PCRE_DOTALL|PCRE_DOLLAR_ENDONLY|PCRE_EXTRA|PCRE_UNGREEDY|PCRE_UTF8| \
508 nigel 91 PCRE_NO_AUTO_CAPTURE|PCRE_NO_UTF8_CHECK|PCRE_AUTO_CALLOUT|PCRE_FIRSTLINE| \
509 nigel 93 PCRE_DUPNAMES|PCRE_NEWLINE_BITS)
510 nigel 77
511     #define PUBLIC_EXEC_OPTIONS \
512     (PCRE_ANCHORED|PCRE_NOTBOL|PCRE_NOTEOL|PCRE_NOTEMPTY|PCRE_NO_UTF8_CHECK| \
513 nigel 93 PCRE_PARTIAL|PCRE_NEWLINE_BITS)
514 nigel 77
515     #define PUBLIC_DFA_EXEC_OPTIONS \
516     (PCRE_ANCHORED|PCRE_NOTBOL|PCRE_NOTEOL|PCRE_NOTEMPTY|PCRE_NO_UTF8_CHECK| \
517 nigel 93 PCRE_PARTIAL|PCRE_DFA_SHORTEST|PCRE_DFA_RESTART|PCRE_NEWLINE_BITS)
518 nigel 77
519     #define PUBLIC_STUDY_OPTIONS 0 /* None defined */
520    
521     /* Magic number to provide a small check against being handed junk. Also used
522     to detect whether a pattern was compiled on a host of different endianness. */
523    
524     #define MAGIC_NUMBER 0x50435245UL /* 'PCRE' */
525    
526     /* Negative values for the firstchar and reqchar variables */
527    
528     #define REQ_UNSET (-2)
529     #define REQ_NONE (-1)
530    
531     /* The maximum remaining length of subject we are prepared to search for a
532     req_byte match. */
533    
534     #define REQ_BYTE_MAX 1000
535    
536     /* Flags added to firstbyte or reqbyte; a "non-literal" item is either a
537     variable-length repeat, or a anything other than literal characters. */
538    
539     #define REQ_CASELESS 0x0100 /* indicates caselessness */
540     #define REQ_VARY 0x0200 /* reqbyte followed non-literal item */
541    
542     /* Miscellaneous definitions */
543    
544     typedef int BOOL;
545    
546     #define FALSE 0
547     #define TRUE 1
548    
549 nigel 93 /* Escape items that are just an encoding of a particular data value. */
550 nigel 77
551     #ifndef ESC_e
552     #define ESC_e 27
553     #endif
554    
555     #ifndef ESC_f
556     #define ESC_f '\f'
557     #endif
558    
559     #ifndef ESC_n
560 nigel 93 #define ESC_n '\n'
561 nigel 77 #endif
562    
563     #ifndef ESC_r
564     #define ESC_r '\r'
565     #endif
566    
567     /* We can't officially use ESC_t because it is a POSIX reserved identifier
568     (presumably because of all the others like size_t). */
569    
570     #ifndef ESC_tee
571     #define ESC_tee '\t'
572     #endif
573    
574 nigel 87 /* Codes for different types of Unicode property */
575    
576     #define PT_ANY 0 /* Any property - matches all chars */
577     #define PT_LAMP 1 /* L& - the union of Lu, Ll, Lt */
578     #define PT_GC 2 /* General characteristic (e.g. L) */
579     #define PT_PC 3 /* Particular characteristic (e.g. Lu) */
580     #define PT_SC 4 /* Script (e.g. Han) */
581    
582     /* Flag bits and data types for the extended class (OP_XCLASS) for classes that
583     contain UTF-8 characters with values greater than 255. */
584    
585     #define XCL_NOT 0x01 /* Flag: this is a negative class */
586     #define XCL_MAP 0x02 /* Flag: a 32-byte map is present */
587    
588     #define XCL_END 0 /* Marks end of individual items */
589     #define XCL_SINGLE 1 /* Single item (one multibyte char) follows */
590     #define XCL_RANGE 2 /* A range (two multibyte chars) follows */
591     #define XCL_PROP 3 /* Unicode property (2-byte property code follows) */
592     #define XCL_NOTPROP 4 /* Unicode inverted property (ditto) */
593    
594 nigel 77 /* These are escaped items that aren't just an encoding of a particular data
595     value such as \n. They must have non-zero values, as check_escape() returns
596     their negation. Also, they must appear in the same order as in the opcode
597     definitions below, up to ESC_z. There's a dummy for OP_ANY because it
598     corresponds to "." rather than an escape sequence. The final one must be
599 nigel 93 ESC_REF as subsequent values are used for backreferences (\1, \2, \3, etc).
600     There are two tests in the code for an escape greater than ESC_b and less than
601     ESC_Z to detect the types that may be repeated. These are the types that
602     consume characters. If any new escapes are put in between that don't consume a
603 nigel 77 character, that code will have to change. */
604    
605 ph10 172 enum { ESC_A = 1, ESC_G, ESC_K, ESC_B, ESC_b, ESC_D, ESC_d, ESC_S, ESC_s,
606 ph10 178 ESC_W, ESC_w, ESC_dum1, ESC_C, ESC_P, ESC_p, ESC_R, ESC_H, ESC_h,
607     ESC_V, ESC_v, ESC_X, ESC_Z, ESC_z, ESC_E, ESC_Q, ESC_k, ESC_REF };
608 nigel 77
609 nigel 93
610 ph10 210 /* Opcode table: Starting from 1 (i.e. after OP_END), the values up to
611 nigel 77 OP_EOD must correspond in order to the list of escapes immediately above.
612    
613 nigel 93 *** NOTE NOTE NOTE *** Whenever this list is updated, the two macro definitions
614     that follow must also be updated to match. There is also a table called
615     "coptable" in pcre_dfa_exec.c that must be updated. */
616    
617 nigel 77 enum {
618     OP_END, /* 0 End of pattern */
619    
620     /* Values corresponding to backslashed metacharacters */
621    
622     OP_SOD, /* 1 Start of data: \A */
623     OP_SOM, /* 2 Start of match (subject + offset): \G */
624 ph10 172 OP_SET_SOM, /* 3 Set start of match (\K) */
625 ph10 168 OP_NOT_WORD_BOUNDARY, /* 4 \B */
626     OP_WORD_BOUNDARY, /* 5 \b */
627     OP_NOT_DIGIT, /* 6 \D */
628     OP_DIGIT, /* 7 \d */
629     OP_NOT_WHITESPACE, /* 8 \S */
630     OP_WHITESPACE, /* 9 \s */
631     OP_NOT_WORDCHAR, /* 10 \W */
632     OP_WORDCHAR, /* 11 \w */
633     OP_ANY, /* 12 Match any character */
634     OP_ANYBYTE, /* 13 Match any byte (\C); different to OP_ANY for UTF-8 */
635     OP_NOTPROP, /* 14 \P (not Unicode property) */
636     OP_PROP, /* 15 \p (Unicode property) */
637     OP_ANYNL, /* 16 \R (any newline sequence) */
638 ph10 178 OP_NOT_HSPACE, /* 17 \H (not horizontal whitespace) */
639     OP_HSPACE, /* 18 \h (horizontal whitespace) */
640     OP_NOT_VSPACE, /* 19 \V (not vertical whitespace) */
641     OP_VSPACE, /* 20 \v (vertical whitespace) */
642     OP_EXTUNI, /* 21 \X (extended Unicode sequence */
643     OP_EODN, /* 22 End of data or \n at end of data: \Z. */
644     OP_EOD, /* 23 End of data: \z */
645 nigel 77
646 ph10 178 OP_OPT, /* 24 Set runtime options */
647     OP_CIRC, /* 25 Start of line - varies with multiline switch */
648     OP_DOLL, /* 26 End of line - varies with multiline switch */
649     OP_CHAR, /* 27 Match one character, casefully */
650     OP_CHARNC, /* 28 Match one character, caselessly */
651     OP_NOT, /* 29 Match one character, not the following one */
652 nigel 77
653 ph10 178 OP_STAR, /* 30 The maximizing and minimizing versions of */
654     OP_MINSTAR, /* 31 these six opcodes must come in pairs, with */
655     OP_PLUS, /* 32 the minimizing one second. */
656     OP_MINPLUS, /* 33 This first set applies to single characters.*/
657     OP_QUERY, /* 34 */
658     OP_MINQUERY, /* 35 */
659 nigel 77
660 ph10 178 OP_UPTO, /* 36 From 0 to n matches */
661     OP_MINUPTO, /* 37 */
662     OP_EXACT, /* 38 Exactly n matches */
663 nigel 77
664 ph10 178 OP_POSSTAR, /* 39 Possessified star */
665     OP_POSPLUS, /* 40 Possessified plus */
666     OP_POSQUERY, /* 41 Posesssified query */
667     OP_POSUPTO, /* 42 Possessified upto */
668 nigel 77
669 ph10 178 OP_NOTSTAR, /* 43 The maximizing and minimizing versions of */
670     OP_NOTMINSTAR, /* 44 these six opcodes must come in pairs, with */
671     OP_NOTPLUS, /* 45 the minimizing one second. They must be in */
672     OP_NOTMINPLUS, /* 46 exactly the same order as those above. */
673     OP_NOTQUERY, /* 47 This set applies to "not" single characters. */
674     OP_NOTMINQUERY, /* 48 */
675 nigel 77
676 ph10 178 OP_NOTUPTO, /* 49 From 0 to n matches */
677     OP_NOTMINUPTO, /* 50 */
678     OP_NOTEXACT, /* 51 Exactly n matches */
679 nigel 93
680 ph10 178 OP_NOTPOSSTAR, /* 52 Possessified versions */
681     OP_NOTPOSPLUS, /* 53 */
682     OP_NOTPOSQUERY, /* 54 */
683     OP_NOTPOSUPTO, /* 55 */
684 nigel 93
685 ph10 178 OP_TYPESTAR, /* 56 The maximizing and minimizing versions of */
686     OP_TYPEMINSTAR, /* 57 these six opcodes must come in pairs, with */
687     OP_TYPEPLUS, /* 58 the minimizing one second. These codes must */
688     OP_TYPEMINPLUS, /* 59 be in exactly the same order as those above. */
689     OP_TYPEQUERY, /* 60 This set applies to character types such as \d */
690     OP_TYPEMINQUERY, /* 61 */
691 nigel 93
692 ph10 178 OP_TYPEUPTO, /* 62 From 0 to n matches */
693     OP_TYPEMINUPTO, /* 63 */
694     OP_TYPEEXACT, /* 64 Exactly n matches */
695 nigel 93
696 ph10 178 OP_TYPEPOSSTAR, /* 65 Possessified versions */
697     OP_TYPEPOSPLUS, /* 66 */
698     OP_TYPEPOSQUERY, /* 67 */
699     OP_TYPEPOSUPTO, /* 68 */
700 nigel 93
701 ph10 178 OP_CRSTAR, /* 69 The maximizing and minimizing versions of */
702     OP_CRMINSTAR, /* 70 all these opcodes must come in pairs, with */
703     OP_CRPLUS, /* 71 the minimizing one second. These codes must */
704     OP_CRMINPLUS, /* 72 be in exactly the same order as those above. */
705     OP_CRQUERY, /* 73 These are for character classes and back refs */
706     OP_CRMINQUERY, /* 74 */
707     OP_CRRANGE, /* 75 These are different to the three sets above. */
708     OP_CRMINRANGE, /* 76 */
709 nigel 93
710 ph10 178 OP_CLASS, /* 77 Match a character class, chars < 256 only */
711     OP_NCLASS, /* 78 Same, but the bitmap was created from a negative
712 nigel 77 class - the difference is relevant only when a UTF-8
713     character > 255 is encountered. */
714    
715 ph10 178 OP_XCLASS, /* 79 Extended class for handling UTF-8 chars within the
716 nigel 77 class. This does both positive and negative. */
717    
718 ph10 178 OP_REF, /* 80 Match a back reference */
719     OP_RECURSE, /* 81 Match a numbered subpattern (possibly recursive) */
720     OP_CALLOUT, /* 82 Call out to external function if provided */
721 nigel 77
722 ph10 178 OP_ALT, /* 83 Start of alternation */
723     OP_KET, /* 84 End of group that doesn't have an unbounded repeat */
724     OP_KETRMAX, /* 85 These two must remain together and in this */
725     OP_KETRMIN, /* 86 order. They are for groups the repeat for ever. */
726 nigel 77
727 nigel 93 /* The assertions must come before BRA, CBRA, ONCE, and COND.*/
728 nigel 77
729 ph10 178 OP_ASSERT, /* 87 Positive lookahead */
730     OP_ASSERT_NOT, /* 88 Negative lookahead */
731     OP_ASSERTBACK, /* 89 Positive lookbehind */
732     OP_ASSERTBACK_NOT, /* 90 Negative lookbehind */
733     OP_REVERSE, /* 91 Move pointer back - used in lookbehind assertions */
734 nigel 77
735 nigel 93 /* ONCE, BRA, CBRA, and COND must come after the assertions, with ONCE first,
736     as there's a test for >= ONCE for a subpattern that isn't an assertion. */
737 nigel 77
738 ph10 178 OP_ONCE, /* 92 Atomic group */
739 ph10 190 OP_BRA, /* 93 Start of non-capturing bracket */
740 ph10 178 OP_CBRA, /* 94 Start of capturing bracket */
741     OP_COND, /* 95 Conditional group */
742 nigel 77
743 nigel 93 /* These three must follow the previous three, in the same order. There's a
744     check for >= SBRA to distinguish the two sets. */
745 nigel 77
746 ph10 178 OP_SBRA, /* 96 Start of non-capturing bracket, check empty */
747     OP_SCBRA, /* 97 Start of capturing bracket, check empty */
748     OP_SCOND, /* 98 Conditional group, check empty */
749 nigel 77
750 ph10 178 OP_CREF, /* 99 Used to hold a capture number as condition */
751     OP_RREF, /* 100 Used to hold a recursion number as condition */
752     OP_DEF, /* 101 The DEFINE condition */
753 nigel 93
754 ph10 178 OP_BRAZERO, /* 102 These two must remain together and in this */
755 ph10 210 OP_BRAMINZERO, /* 103 order. */
756    
757     /* These are backtracking control verbs */
758    
759     OP_PRUNE, /* 104 */
760     OP_SKIP, /* 105 */
761     OP_THEN, /* 106 */
762     OP_COMMIT, /* 107 */
763    
764     /* These are forced failure and success verbs */
765    
766     OP_FAIL, /* 108 */
767     OP_ACCEPT /* 109 */
768 nigel 77 };
769    
770    
771     /* This macro defines textual names for all the opcodes. These are used only
772     for debugging. The macro is referenced only in pcre_printint.c. */
773    
774     #define OP_NAME_LIST \
775 ph10 168 "End", "\\A", "\\G", "\\K", "\\B", "\\b", "\\D", "\\d", \
776 nigel 77 "\\S", "\\s", "\\W", "\\w", "Any", "Anybyte", \
777 ph10 178 "notprop", "prop", "\\R", "\\H", "\\h", "\\V", "\\v", \
778     "extuni", "\\Z", "\\z", \
779 nigel 77 "Opt", "^", "$", "char", "charnc", "not", \
780     "*", "*?", "+", "+?", "?", "??", "{", "{", "{", \
781 nigel 93 "*+","++", "?+", "{", \
782 nigel 77 "*", "*?", "+", "+?", "?", "??", "{", "{", "{", \
783 nigel 93 "*+","++", "?+", "{", \
784 nigel 77 "*", "*?", "+", "+?", "?", "??", "{", "{", "{", \
785 nigel 93 "*+","++", "?+", "{", \
786 nigel 77 "*", "*?", "+", "+?", "?", "??", "{", "{", \
787     "class", "nclass", "xclass", "Ref", "Recurse", "Callout", \
788     "Alt", "Ket", "KetRmax", "KetRmin", "Assert", "Assert not", \
789 nigel 93 "AssertB", "AssertB not", "Reverse", \
790 ph10 192 "Once", "Bra", "CBra", "Cond", "SBra", "SCBra", "SCond", \
791 ph10 210 "Cond ref", "Cond rec", "Cond def", "Brazero", "Braminzero", \
792     "*PRUNE", "*SKIP", "*THEN", "*COMMIT", "*FAIL", "*ACCEPT"
793 nigel 77
794    
795     /* This macro defines the length of fixed length operations in the compiled
796     regex. The lengths are used when searching for specific things, and also in the
797     debugging printing of a compiled regex. We use a macro so that it can be
798     defined close to the definitions of the opcodes themselves.
799    
800     As things have been extended, some of these are no longer fixed lenths, but are
801     minima instead. For example, the length of a single-character repeat may vary
802     in UTF-8 mode. The code that uses this table must know about such things. */
803    
804     #define OP_LENGTHS \
805     1, /* End */ \
806 ph10 168 1, 1, 1, 1, 1, /* \A, \G, \K, \B, \b */ \
807     1, 1, 1, 1, 1, 1, /* \D, \d, \S, \s, \W, \w */ \
808 nigel 77 1, 1, /* Any, Anybyte */ \
809 ph10 178 3, 3, 1, /* NOTPROP, PROP, EXTUNI */ \
810     1, 1, 1, 1, 1, /* \R, \H, \h, \V, \v */ \
811 nigel 77 1, 1, 2, 1, 1, /* \Z, \z, Opt, ^, $ */ \
812     2, /* Char - the minimum length */ \
813     2, /* Charnc - the minimum length */ \
814     2, /* not */ \
815     /* Positive single-char repeats ** These are */ \
816     2, 2, 2, 2, 2, 2, /* *, *?, +, +?, ?, ?? ** minima in */ \
817     4, 4, 4, /* upto, minupto, exact ** UTF-8 mode */ \
818 nigel 93 2, 2, 2, 4, /* *+, ++, ?+, upto+ */ \
819 nigel 77 /* Negative single-char repeats - only for chars < 256 */ \
820     2, 2, 2, 2, 2, 2, /* NOT *, *?, +, +?, ?, ?? */ \
821     4, 4, 4, /* NOT upto, minupto, exact */ \
822 nigel 93 2, 2, 2, 4, /* Possessive *, +, ?, upto */ \
823 nigel 77 /* Positive type repeats */ \
824     2, 2, 2, 2, 2, 2, /* Type *, *?, +, +?, ?, ?? */ \
825     4, 4, 4, /* Type upto, minupto, exact */ \
826 nigel 93 2, 2, 2, 4, /* Possessive *+, ++, ?+, upto+ */ \
827 nigel 77 /* Character class & ref repeats */ \
828     1, 1, 1, 1, 1, 1, /* *, *?, +, +?, ?, ?? */ \
829     5, 5, /* CRRANGE, CRMINRANGE */ \
830     33, /* CLASS */ \
831     33, /* NCLASS */ \
832     0, /* XCLASS - variable length */ \
833     3, /* REF */ \
834     1+LINK_SIZE, /* RECURSE */ \
835     2+2*LINK_SIZE, /* CALLOUT */ \
836     1+LINK_SIZE, /* Alt */ \
837     1+LINK_SIZE, /* Ket */ \
838     1+LINK_SIZE, /* KetRmax */ \
839     1+LINK_SIZE, /* KetRmin */ \
840     1+LINK_SIZE, /* Assert */ \
841     1+LINK_SIZE, /* Assert not */ \
842     1+LINK_SIZE, /* Assert behind */ \
843     1+LINK_SIZE, /* Assert behind not */ \
844     1+LINK_SIZE, /* Reverse */ \
845 nigel 93 1+LINK_SIZE, /* ONCE */ \
846     1+LINK_SIZE, /* BRA */ \
847     3+LINK_SIZE, /* CBRA */ \
848 nigel 77 1+LINK_SIZE, /* COND */ \
849 nigel 93 1+LINK_SIZE, /* SBRA */ \
850     3+LINK_SIZE, /* SCBRA */ \
851     1+LINK_SIZE, /* SCOND */ \
852 nigel 77 3, /* CREF */ \
853 nigel 93 3, /* RREF */ \
854     1, /* DEF */ \
855 nigel 77 1, 1, /* BRAZERO, BRAMINZERO */ \
856 ph10 210 1, 1, 1, 1, /* PRUNE, SKIP, THEN, COMMIT, */ \
857     1, 1 /* FAIL, ACCEPT */
858 nigel 77
859    
860 nigel 93 /* A magic value for OP_RREF to indicate the "any recursion" condition. */
861 nigel 77
862 nigel 93 #define RREF_ANY 0xffff
863 nigel 77
864     /* Error code numbers. They are given names so that they can more easily be
865     tracked. */
866    
867     enum { ERR0, ERR1, ERR2, ERR3, ERR4, ERR5, ERR6, ERR7, ERR8, ERR9,
868     ERR10, ERR11, ERR12, ERR13, ERR14, ERR15, ERR16, ERR17, ERR18, ERR19,
869     ERR20, ERR21, ERR22, ERR23, ERR24, ERR25, ERR26, ERR27, ERR28, ERR29,
870     ERR30, ERR31, ERR32, ERR33, ERR34, ERR35, ERR36, ERR37, ERR38, ERR39,
871 nigel 91 ERR40, ERR41, ERR42, ERR43, ERR44, ERR45, ERR46, ERR47, ERR48, ERR49,
872 ph10 210 ERR50, ERR51, ERR52, ERR53, ERR54, ERR55, ERR56, ERR57, ERR58, ERR59,
873 ph10 213 ERR60, ERR61 };
874 nigel 77
875     /* The real format of the start of the pcre block; the index of names and the
876     code vector run on as long as necessary after the end. We store an explicit
877     offset to the name table so that if a regex is compiled on one host, saved, and
878     then run on another where the size of pointers is different, all might still
879     be well. For the case of compiled-on-4 and run-on-8, we include an extra
880     pointer that is always NULL. For future-proofing, a few dummy fields were
881     originally included - even though you can never get this planning right - but
882     there is only one left now.
883    
884     NOTE NOTE NOTE:
885     Because people can now save and re-use compiled patterns, any additions to this
886     structure should be made at the end, and something earlier (e.g. a new
887     flag in the options or one of the dummy fields) should indicate that the new
888     fields are present. Currently PCRE always sets the dummy fields to zero.
889     NOTE NOTE NOTE:
890     */
891    
892     typedef struct real_pcre {
893     pcre_uint32 magic_number;
894     pcre_uint32 size; /* Total that was malloced */
895 ph10 230 pcre_uint32 options; /* Public options */
896     pcre_uint16 flags; /* Private flags */
897     pcre_uint16 dummy1; /* For future use */
898 nigel 77 pcre_uint16 top_bracket;
899     pcre_uint16 top_backref;
900     pcre_uint16 first_byte;
901     pcre_uint16 req_byte;
902     pcre_uint16 name_table_offset; /* Offset to name table that follows */
903     pcre_uint16 name_entry_size; /* Size of any name items */
904     pcre_uint16 name_count; /* Number of name items */
905     pcre_uint16 ref_count; /* Reference count */
906    
907     const unsigned char *tables; /* Pointer to tables or NULL for std */
908     const unsigned char *nullpad; /* NULL padding */
909     } real_pcre;
910    
911     /* The format of the block used to store data from pcre_study(). The same
912     remark (see NOTE above) about extending this structure applies. */
913    
914     typedef struct pcre_study_data {
915     pcre_uint32 size; /* Total that was malloced */
916     pcre_uint32 options;
917     uschar start_bits[32];
918     } pcre_study_data;
919    
920     /* Structure for passing "static" information around between the functions
921     doing the compiling, so that they are thread-safe. */
922    
923     typedef struct compile_data {
924     const uschar *lcc; /* Points to lower casing table */
925     const uschar *fcc; /* Points to case-flipping table */
926     const uschar *cbits; /* Points to character type table */
927     const uschar *ctypes; /* Points to table of type maps */
928 nigel 93 const uschar *start_workspace;/* The start of working space */
929 nigel 77 const uschar *start_code; /* The start of the compiled code */
930     const uschar *start_pattern; /* The start of the pattern */
931 nigel 93 const uschar *end_pattern; /* The end of the pattern */
932     uschar *hwm; /* High watermark of workspace */
933 nigel 77 uschar *name_table; /* The name/number table */
934     int names_found; /* Number of entries so far */
935     int name_entry_size; /* Size of each entry */
936 nigel 93 int bracount; /* Count of capturing parens */
937 nigel 77 int top_backref; /* Maximum back reference */
938     unsigned int backref_map; /* Bitmap of low back refs */
939 nigel 93 int external_options; /* External (initial) options */
940 ph10 230 int external_flags; /* External flag bits to be set */
941 nigel 77 int req_varyopt; /* "After variable item" flag for reqbyte */
942 ph10 211 BOOL had_accept; /* (*ACCEPT) encountered */
943 nigel 93 int nltype; /* Newline type */
944     int nllen; /* Newline string length */
945     uschar nl[4]; /* Newline string when fixed length */
946 nigel 77 } compile_data;
947    
948     /* Structure for maintaining a chain of pointers to the currently incomplete
949     branches, for testing for left recursion. */
950    
951     typedef struct branch_chain {
952     struct branch_chain *outer;
953     uschar *current;
954     } branch_chain;
955    
956     /* Structure for items in a linked list that represents an explicit recursive
957     call within the pattern. */
958    
959     typedef struct recursion_info {
960     struct recursion_info *prevrec; /* Previous recursion record (or NULL) */
961     int group_num; /* Number of group that was called */
962     const uschar *after_call; /* "Return value": points after the call in the expr */
963 ph10 168 USPTR save_start; /* Old value of mstart */
964 nigel 77 int *offset_save; /* Pointer to start of saved offsets */
965     int saved_max; /* Number of saved offsets */
966     } recursion_info;
967    
968 nigel 93 /* Structure for building a chain of data for holding the values of the subject
969     pointer at the start of each subpattern, so as to detect when an empty string
970     has been matched by a subpattern - to break infinite loops. */
971    
972     typedef struct eptrblock {
973     struct eptrblock *epb_prev;
974     USPTR epb_saved_eptr;
975     } eptrblock;
976    
977    
978 nigel 77 /* Structure for passing "static" information around between the functions
979     doing traditional NFA matching, so that they are thread-safe. */
980    
981     typedef struct match_data {
982 nigel 87 unsigned long int match_call_count; /* As it says */
983     unsigned long int match_limit; /* As it says */
984     unsigned long int match_limit_recursion; /* As it says */
985 nigel 77 int *offset_vector; /* Offset vector */
986     int offset_end; /* One past the end */
987     int offset_max; /* The maximum usable for return data */
988 nigel 93 int nltype; /* Newline type */
989     int nllen; /* Newline string length */
990     uschar nl[4]; /* Newline string when fixed */
991 nigel 77 const uschar *lcc; /* Points to lower casing table */
992     const uschar *ctypes; /* Points to table of type maps */
993     BOOL offset_overflow; /* Set if too many extractions */
994     BOOL notbol; /* NOTBOL flag */
995     BOOL noteol; /* NOTEOL flag */
996     BOOL utf8; /* UTF8 flag */
997     BOOL endonly; /* Dollar not before final \n */
998     BOOL notempty; /* Empty string match not wanted */
999     BOOL partial; /* PARTIAL flag */
1000     BOOL hitend; /* Hit the end of the subject at some point */
1001     const uschar *start_code; /* For use when recursing */
1002 nigel 87 USPTR start_subject; /* Start of the subject string */
1003     USPTR end_subject; /* End of the subject string */
1004 ph10 168 USPTR start_match_ptr; /* Start of matched string */
1005 nigel 87 USPTR end_match_ptr; /* Subject position at end match */
1006 nigel 77 int end_offset_top; /* Highwater mark at end of match */
1007     int capture_last; /* Most recent capture number */
1008     int start_offset; /* The start offset value */
1009 nigel 93 eptrblock *eptrchain; /* Chain of eptrblocks for tail recursions */
1010     int eptrn; /* Next free eptrblock */
1011 nigel 77 recursion_info *recursive; /* Linked list of recursion data */
1012     void *callout_data; /* To pass back to callouts */
1013     } match_data;
1014    
1015     /* A similar structure is used for the same purpose by the DFA matching
1016     functions. */
1017    
1018     typedef struct dfa_match_data {
1019     const uschar *start_code; /* Start of the compiled pattern */
1020     const uschar *start_subject; /* Start of the subject string */
1021     const uschar *end_subject; /* End of subject string */
1022     const uschar *tables; /* Character tables */
1023     int moptions; /* Match options */
1024     int poptions; /* Pattern options */
1025 nigel 93 int nltype; /* Newline type */
1026     int nllen; /* Newline string length */
1027     uschar nl[4]; /* Newline string when fixed */
1028 nigel 77 void *callout_data; /* To pass back to callouts */
1029     } dfa_match_data;
1030    
1031     /* Bit definitions for entries in the pcre_ctypes table. */
1032    
1033     #define ctype_space 0x01
1034     #define ctype_letter 0x02
1035     #define ctype_digit 0x04
1036     #define ctype_xdigit 0x08
1037     #define ctype_word 0x10 /* alphameric or '_' */
1038     #define ctype_meta 0x80 /* regexp meta char or zero (end pattern) */
1039    
1040     /* Offsets for the bitmap tables in pcre_cbits. Each table contains a set
1041     of bits for a class map. Some classes are built by combining these tables. */
1042    
1043     #define cbit_space 0 /* [:space:] or \s */
1044     #define cbit_xdigit 32 /* [:xdigit:] */
1045     #define cbit_digit 64 /* [:digit:] or \d */
1046     #define cbit_upper 96 /* [:upper:] */
1047     #define cbit_lower 128 /* [:lower:] */
1048     #define cbit_word 160 /* [:word:] or \w */
1049     #define cbit_graph 192 /* [:graph:] */
1050     #define cbit_print 224 /* [:print:] */
1051     #define cbit_punct 256 /* [:punct:] */
1052     #define cbit_cntrl 288 /* [:cntrl:] */
1053     #define cbit_length 320 /* Length of the cbits table */
1054    
1055     /* Offsets of the various tables from the base tables pointer, and
1056     total length. */
1057    
1058     #define lcc_offset 0
1059     #define fcc_offset 256
1060     #define cbits_offset 512
1061     #define ctypes_offset (cbits_offset + cbit_length)
1062     #define tables_length (ctypes_offset + 256)
1063    
1064 nigel 87 /* Layout of the UCP type table that translates property names into types and
1065     codes. */
1066 nigel 77
1067     typedef struct {
1068     const char *name;
1069 nigel 87 pcre_uint16 type;
1070     pcre_uint16 value;
1071 nigel 77 } ucp_type_table;
1072    
1073    
1074     /* Internal shared data tables. These are tables that are used by more than one
1075     of the exported public functions. They have to be "external" in the C sense,
1076     but are not part of the PCRE public API. The data for these tables is in the
1077     pcre_tables.c module. */
1078    
1079     extern const int _pcre_utf8_table1[];
1080     extern const int _pcre_utf8_table2[];
1081     extern const int _pcre_utf8_table3[];
1082     extern const uschar _pcre_utf8_table4[];
1083    
1084     extern const int _pcre_utf8_table1_size;
1085    
1086     extern const ucp_type_table _pcre_utt[];
1087     extern const int _pcre_utt_size;
1088    
1089     extern const uschar _pcre_default_tables[];
1090    
1091     extern const uschar _pcre_OP_lengths[];
1092    
1093    
1094     /* Internal shared functions. These are functions that are used by more than
1095     one of the exported public functions. They have to be "external" in the C
1096     sense, but are not part of the PCRE public API. */
1097    
1098 ph10 150 extern BOOL _pcre_is_newline(const uschar *, int, const uschar *,
1099 ph10 149 int *, BOOL);
1100 nigel 93 extern int _pcre_ord2utf8(int, uschar *);
1101     extern real_pcre *_pcre_try_flipped(const real_pcre *, real_pcre *,
1102     const pcre_study_data *, pcre_study_data *);
1103     extern int _pcre_ucp_findprop(const unsigned int, int *, int *);
1104     extern unsigned int _pcre_ucp_othercase(const unsigned int);
1105     extern int _pcre_valid_utf8(const uschar *, int);
1106 ph10 150 extern BOOL _pcre_was_newline(const uschar *, int, const uschar *,
1107 ph10 149 int *, BOOL);
1108 nigel 93 extern BOOL _pcre_xclass(int, const uschar *);
1109 nigel 77
1110 nigel 85 #endif
1111    
1112 nigel 77 /* End of pcre_internal.h */

Properties

Name Value
svn:eol-style native
svn:keywords "Author Date Id Revision Url"

webmaster@exim.org
ViewVC Help
Powered by ViewVC 1.1.12