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Revision 207 - (hide annotations) (download)
Mon Aug 6 09:32:14 2007 UTC (7 years, 1 month ago) by ph10
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File size: 45210 byte(s)
Fix backtrack past start of subject bugs caused by the use of \X, \p, or \P in 
non-UTF-8 mode and the presence of top-bit-set characters.

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 207 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     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 207 it is. This is called only in UTF-8 mode - we don't put a test within the macro
465     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 nigel 91 /* Private options flags start at the most significant end of the four bytes.
485     The public options defined in pcre.h start at the least significant end. Make
486     sure they don't overlap! The bits are getting a bit scarce now -- when we run
487     out, there is a dummy word in the structure that could be used for the private
488     bits. */
489 nigel 77
490 nigel 91 #define PCRE_NOPARTIAL 0x80000000 /* can't use partial with this regex */
491 nigel 77 #define PCRE_FIRSTSET 0x40000000 /* first_byte is set */
492     #define PCRE_REQCHSET 0x20000000 /* req_byte is set */
493     #define PCRE_STARTLINE 0x10000000 /* start after \n for multiline */
494 nigel 91 #define PCRE_JCHANGED 0x08000000 /* j option changes within regex */
495 nigel 77
496     /* Options for the "extra" block produced by pcre_study(). */
497    
498     #define PCRE_STUDY_MAPPED 0x01 /* a map of starting chars exists */
499    
500     /* Masks for identifying the public options that are permitted at compile
501     time, run time, or study time, respectively. */
502    
503 ph10 149 #define PCRE_NEWLINE_BITS (PCRE_NEWLINE_CR|PCRE_NEWLINE_LF|PCRE_NEWLINE_ANY| \
504     PCRE_NEWLINE_ANYCRLF)
505 nigel 93
506 nigel 77 #define PUBLIC_OPTIONS \
507     (PCRE_CASELESS|PCRE_EXTENDED|PCRE_ANCHORED|PCRE_MULTILINE| \
508     PCRE_DOTALL|PCRE_DOLLAR_ENDONLY|PCRE_EXTRA|PCRE_UNGREEDY|PCRE_UTF8| \
509 nigel 91 PCRE_NO_AUTO_CAPTURE|PCRE_NO_UTF8_CHECK|PCRE_AUTO_CALLOUT|PCRE_FIRSTLINE| \
510 nigel 93 PCRE_DUPNAMES|PCRE_NEWLINE_BITS)
511 nigel 77
512     #define PUBLIC_EXEC_OPTIONS \
513     (PCRE_ANCHORED|PCRE_NOTBOL|PCRE_NOTEOL|PCRE_NOTEMPTY|PCRE_NO_UTF8_CHECK| \
514 nigel 93 PCRE_PARTIAL|PCRE_NEWLINE_BITS)
515 nigel 77
516     #define PUBLIC_DFA_EXEC_OPTIONS \
517     (PCRE_ANCHORED|PCRE_NOTBOL|PCRE_NOTEOL|PCRE_NOTEMPTY|PCRE_NO_UTF8_CHECK| \
518 nigel 93 PCRE_PARTIAL|PCRE_DFA_SHORTEST|PCRE_DFA_RESTART|PCRE_NEWLINE_BITS)
519 nigel 77
520     #define PUBLIC_STUDY_OPTIONS 0 /* None defined */
521    
522     /* Magic number to provide a small check against being handed junk. Also used
523     to detect whether a pattern was compiled on a host of different endianness. */
524    
525     #define MAGIC_NUMBER 0x50435245UL /* 'PCRE' */
526    
527     /* Negative values for the firstchar and reqchar variables */
528    
529     #define REQ_UNSET (-2)
530     #define REQ_NONE (-1)
531    
532     /* The maximum remaining length of subject we are prepared to search for a
533     req_byte match. */
534    
535     #define REQ_BYTE_MAX 1000
536    
537     /* Flags added to firstbyte or reqbyte; a "non-literal" item is either a
538     variable-length repeat, or a anything other than literal characters. */
539    
540     #define REQ_CASELESS 0x0100 /* indicates caselessness */
541     #define REQ_VARY 0x0200 /* reqbyte followed non-literal item */
542    
543     /* Miscellaneous definitions */
544    
545     typedef int BOOL;
546    
547     #define FALSE 0
548     #define TRUE 1
549    
550 nigel 93 /* Escape items that are just an encoding of a particular data value. */
551 nigel 77
552     #ifndef ESC_e
553     #define ESC_e 27
554     #endif
555    
556     #ifndef ESC_f
557     #define ESC_f '\f'
558     #endif
559    
560     #ifndef ESC_n
561 nigel 93 #define ESC_n '\n'
562 nigel 77 #endif
563    
564     #ifndef ESC_r
565     #define ESC_r '\r'
566     #endif
567    
568     /* We can't officially use ESC_t because it is a POSIX reserved identifier
569     (presumably because of all the others like size_t). */
570    
571     #ifndef ESC_tee
572     #define ESC_tee '\t'
573     #endif
574    
575 nigel 87 /* Codes for different types of Unicode property */
576    
577     #define PT_ANY 0 /* Any property - matches all chars */
578     #define PT_LAMP 1 /* L& - the union of Lu, Ll, Lt */
579     #define PT_GC 2 /* General characteristic (e.g. L) */
580     #define PT_PC 3 /* Particular characteristic (e.g. Lu) */
581     #define PT_SC 4 /* Script (e.g. Han) */
582    
583     /* Flag bits and data types for the extended class (OP_XCLASS) for classes that
584     contain UTF-8 characters with values greater than 255. */
585    
586     #define XCL_NOT 0x01 /* Flag: this is a negative class */
587     #define XCL_MAP 0x02 /* Flag: a 32-byte map is present */
588    
589     #define XCL_END 0 /* Marks end of individual items */
590     #define XCL_SINGLE 1 /* Single item (one multibyte char) follows */
591     #define XCL_RANGE 2 /* A range (two multibyte chars) follows */
592     #define XCL_PROP 3 /* Unicode property (2-byte property code follows) */
593     #define XCL_NOTPROP 4 /* Unicode inverted property (ditto) */
594    
595 nigel 77 /* These are escaped items that aren't just an encoding of a particular data
596     value such as \n. They must have non-zero values, as check_escape() returns
597     their negation. Also, they must appear in the same order as in the opcode
598     definitions below, up to ESC_z. There's a dummy for OP_ANY because it
599     corresponds to "." rather than an escape sequence. The final one must be
600 nigel 93 ESC_REF as subsequent values are used for backreferences (\1, \2, \3, etc).
601     There are two tests in the code for an escape greater than ESC_b and less than
602     ESC_Z to detect the types that may be repeated. These are the types that
603     consume characters. If any new escapes are put in between that don't consume a
604 nigel 77 character, that code will have to change. */
605    
606 ph10 172 enum { ESC_A = 1, ESC_G, ESC_K, ESC_B, ESC_b, ESC_D, ESC_d, ESC_S, ESC_s,
607 ph10 178 ESC_W, ESC_w, ESC_dum1, ESC_C, ESC_P, ESC_p, ESC_R, ESC_H, ESC_h,
608     ESC_V, ESC_v, ESC_X, ESC_Z, ESC_z, ESC_E, ESC_Q, ESC_k, ESC_REF };
609 nigel 77
610 nigel 93
611 nigel 77 /* Opcode table: OP_BRA must be last, as all values >= it are used for brackets
612     that extract substrings. Starting from 1 (i.e. after OP_END), the values up to
613     OP_EOD must correspond in order to the list of escapes immediately above.
614    
615 nigel 93 To keep stored, compiled patterns compatible, new opcodes should be added
616     immediately before OP_BRA, where (since release 7.0) a gap is left for this
617     purpose.
618    
619     *** NOTE NOTE NOTE *** Whenever this list is updated, the two macro definitions
620     that follow must also be updated to match. There is also a table called
621     "coptable" in pcre_dfa_exec.c that must be updated. */
622    
623 nigel 77 enum {
624     OP_END, /* 0 End of pattern */
625    
626     /* Values corresponding to backslashed metacharacters */
627    
628     OP_SOD, /* 1 Start of data: \A */
629     OP_SOM, /* 2 Start of match (subject + offset): \G */
630 ph10 172 OP_SET_SOM, /* 3 Set start of match (\K) */
631 ph10 168 OP_NOT_WORD_BOUNDARY, /* 4 \B */
632     OP_WORD_BOUNDARY, /* 5 \b */
633     OP_NOT_DIGIT, /* 6 \D */
634     OP_DIGIT, /* 7 \d */
635     OP_NOT_WHITESPACE, /* 8 \S */
636     OP_WHITESPACE, /* 9 \s */
637     OP_NOT_WORDCHAR, /* 10 \W */
638     OP_WORDCHAR, /* 11 \w */
639     OP_ANY, /* 12 Match any character */
640     OP_ANYBYTE, /* 13 Match any byte (\C); different to OP_ANY for UTF-8 */
641     OP_NOTPROP, /* 14 \P (not Unicode property) */
642     OP_PROP, /* 15 \p (Unicode property) */
643     OP_ANYNL, /* 16 \R (any newline sequence) */
644 ph10 178 OP_NOT_HSPACE, /* 17 \H (not horizontal whitespace) */
645     OP_HSPACE, /* 18 \h (horizontal whitespace) */
646     OP_NOT_VSPACE, /* 19 \V (not vertical whitespace) */
647     OP_VSPACE, /* 20 \v (vertical whitespace) */
648     OP_EXTUNI, /* 21 \X (extended Unicode sequence */
649     OP_EODN, /* 22 End of data or \n at end of data: \Z. */
650     OP_EOD, /* 23 End of data: \z */
651 nigel 77
652 ph10 178 OP_OPT, /* 24 Set runtime options */
653     OP_CIRC, /* 25 Start of line - varies with multiline switch */
654     OP_DOLL, /* 26 End of line - varies with multiline switch */
655     OP_CHAR, /* 27 Match one character, casefully */
656     OP_CHARNC, /* 28 Match one character, caselessly */
657     OP_NOT, /* 29 Match one character, not the following one */
658 nigel 77
659 ph10 178 OP_STAR, /* 30 The maximizing and minimizing versions of */
660     OP_MINSTAR, /* 31 these six opcodes must come in pairs, with */
661     OP_PLUS, /* 32 the minimizing one second. */
662     OP_MINPLUS, /* 33 This first set applies to single characters.*/
663     OP_QUERY, /* 34 */
664     OP_MINQUERY, /* 35 */
665 nigel 77
666 ph10 178 OP_UPTO, /* 36 From 0 to n matches */
667     OP_MINUPTO, /* 37 */
668     OP_EXACT, /* 38 Exactly n matches */
669 nigel 77
670 ph10 178 OP_POSSTAR, /* 39 Possessified star */
671     OP_POSPLUS, /* 40 Possessified plus */
672     OP_POSQUERY, /* 41 Posesssified query */
673     OP_POSUPTO, /* 42 Possessified upto */
674 nigel 77
675 ph10 178 OP_NOTSTAR, /* 43 The maximizing and minimizing versions of */
676     OP_NOTMINSTAR, /* 44 these six opcodes must come in pairs, with */
677     OP_NOTPLUS, /* 45 the minimizing one second. They must be in */
678     OP_NOTMINPLUS, /* 46 exactly the same order as those above. */
679     OP_NOTQUERY, /* 47 This set applies to "not" single characters. */
680     OP_NOTMINQUERY, /* 48 */
681 nigel 77
682 ph10 178 OP_NOTUPTO, /* 49 From 0 to n matches */
683     OP_NOTMINUPTO, /* 50 */
684     OP_NOTEXACT, /* 51 Exactly n matches */
685 nigel 93
686 ph10 178 OP_NOTPOSSTAR, /* 52 Possessified versions */
687     OP_NOTPOSPLUS, /* 53 */
688     OP_NOTPOSQUERY, /* 54 */
689     OP_NOTPOSUPTO, /* 55 */
690 nigel 93
691 ph10 178 OP_TYPESTAR, /* 56 The maximizing and minimizing versions of */
692     OP_TYPEMINSTAR, /* 57 these six opcodes must come in pairs, with */
693     OP_TYPEPLUS, /* 58 the minimizing one second. These codes must */
694     OP_TYPEMINPLUS, /* 59 be in exactly the same order as those above. */
695     OP_TYPEQUERY, /* 60 This set applies to character types such as \d */
696     OP_TYPEMINQUERY, /* 61 */
697 nigel 93
698 ph10 178 OP_TYPEUPTO, /* 62 From 0 to n matches */
699     OP_TYPEMINUPTO, /* 63 */
700     OP_TYPEEXACT, /* 64 Exactly n matches */
701 nigel 93
702 ph10 178 OP_TYPEPOSSTAR, /* 65 Possessified versions */
703     OP_TYPEPOSPLUS, /* 66 */
704     OP_TYPEPOSQUERY, /* 67 */
705     OP_TYPEPOSUPTO, /* 68 */
706 nigel 93
707 ph10 178 OP_CRSTAR, /* 69 The maximizing and minimizing versions of */
708     OP_CRMINSTAR, /* 70 all these opcodes must come in pairs, with */
709     OP_CRPLUS, /* 71 the minimizing one second. These codes must */
710     OP_CRMINPLUS, /* 72 be in exactly the same order as those above. */
711     OP_CRQUERY, /* 73 These are for character classes and back refs */
712     OP_CRMINQUERY, /* 74 */
713     OP_CRRANGE, /* 75 These are different to the three sets above. */
714     OP_CRMINRANGE, /* 76 */
715 nigel 93
716 ph10 178 OP_CLASS, /* 77 Match a character class, chars < 256 only */
717     OP_NCLASS, /* 78 Same, but the bitmap was created from a negative
718 nigel 77 class - the difference is relevant only when a UTF-8
719     character > 255 is encountered. */
720    
721 ph10 178 OP_XCLASS, /* 79 Extended class for handling UTF-8 chars within the
722 nigel 77 class. This does both positive and negative. */
723    
724 ph10 178 OP_REF, /* 80 Match a back reference */
725     OP_RECURSE, /* 81 Match a numbered subpattern (possibly recursive) */
726     OP_CALLOUT, /* 82 Call out to external function if provided */
727 nigel 77
728 ph10 178 OP_ALT, /* 83 Start of alternation */
729     OP_KET, /* 84 End of group that doesn't have an unbounded repeat */
730     OP_KETRMAX, /* 85 These two must remain together and in this */
731     OP_KETRMIN, /* 86 order. They are for groups the repeat for ever. */
732 nigel 77
733 nigel 93 /* The assertions must come before BRA, CBRA, ONCE, and COND.*/
734 nigel 77
735 ph10 178 OP_ASSERT, /* 87 Positive lookahead */
736     OP_ASSERT_NOT, /* 88 Negative lookahead */
737     OP_ASSERTBACK, /* 89 Positive lookbehind */
738     OP_ASSERTBACK_NOT, /* 90 Negative lookbehind */
739     OP_REVERSE, /* 91 Move pointer back - used in lookbehind assertions */
740 nigel 77
741 nigel 93 /* ONCE, BRA, CBRA, and COND must come after the assertions, with ONCE first,
742     as there's a test for >= ONCE for a subpattern that isn't an assertion. */
743 nigel 77
744 ph10 178 OP_ONCE, /* 92 Atomic group */
745 ph10 190 OP_BRA, /* 93 Start of non-capturing bracket */
746 ph10 178 OP_CBRA, /* 94 Start of capturing bracket */
747     OP_COND, /* 95 Conditional group */
748 nigel 77
749 nigel 93 /* These three must follow the previous three, in the same order. There's a
750     check for >= SBRA to distinguish the two sets. */
751 nigel 77
752 ph10 178 OP_SBRA, /* 96 Start of non-capturing bracket, check empty */
753     OP_SCBRA, /* 97 Start of capturing bracket, check empty */
754     OP_SCOND, /* 98 Conditional group, check empty */
755 nigel 77
756 ph10 178 OP_CREF, /* 99 Used to hold a capture number as condition */
757     OP_RREF, /* 100 Used to hold a recursion number as condition */
758     OP_DEF, /* 101 The DEFINE condition */
759 nigel 93
760 ph10 178 OP_BRAZERO, /* 102 These two must remain together and in this */
761     OP_BRAMINZERO /* 103 order. */
762 nigel 77 };
763    
764    
765     /* This macro defines textual names for all the opcodes. These are used only
766     for debugging. The macro is referenced only in pcre_printint.c. */
767    
768     #define OP_NAME_LIST \
769 ph10 168 "End", "\\A", "\\G", "\\K", "\\B", "\\b", "\\D", "\\d", \
770 nigel 77 "\\S", "\\s", "\\W", "\\w", "Any", "Anybyte", \
771 ph10 178 "notprop", "prop", "\\R", "\\H", "\\h", "\\V", "\\v", \
772     "extuni", "\\Z", "\\z", \
773 nigel 77 "Opt", "^", "$", "char", "charnc", "not", \
774     "*", "*?", "+", "+?", "?", "??", "{", "{", "{", \
775 nigel 93 "*+","++", "?+", "{", \
776 nigel 77 "*", "*?", "+", "+?", "?", "??", "{", "{", "{", \
777 nigel 93 "*+","++", "?+", "{", \
778 nigel 77 "*", "*?", "+", "+?", "?", "??", "{", "{", "{", \
779 nigel 93 "*+","++", "?+", "{", \
780 nigel 77 "*", "*?", "+", "+?", "?", "??", "{", "{", \
781     "class", "nclass", "xclass", "Ref", "Recurse", "Callout", \
782     "Alt", "Ket", "KetRmax", "KetRmin", "Assert", "Assert not", \
783 nigel 93 "AssertB", "AssertB not", "Reverse", \
784 ph10 192 "Once", "Bra", "CBra", "Cond", "SBra", "SCBra", "SCond", \
785 nigel 93 "Cond ref", "Cond rec", "Cond def", "Brazero", "Braminzero"
786 nigel 77
787    
788     /* This macro defines the length of fixed length operations in the compiled
789     regex. The lengths are used when searching for specific things, and also in the
790     debugging printing of a compiled regex. We use a macro so that it can be
791     defined close to the definitions of the opcodes themselves.
792    
793     As things have been extended, some of these are no longer fixed lenths, but are
794     minima instead. For example, the length of a single-character repeat may vary
795     in UTF-8 mode. The code that uses this table must know about such things. */
796    
797     #define OP_LENGTHS \
798     1, /* End */ \
799 ph10 168 1, 1, 1, 1, 1, /* \A, \G, \K, \B, \b */ \
800     1, 1, 1, 1, 1, 1, /* \D, \d, \S, \s, \W, \w */ \
801 nigel 77 1, 1, /* Any, Anybyte */ \
802 ph10 178 3, 3, 1, /* NOTPROP, PROP, EXTUNI */ \
803     1, 1, 1, 1, 1, /* \R, \H, \h, \V, \v */ \
804 nigel 77 1, 1, 2, 1, 1, /* \Z, \z, Opt, ^, $ */ \
805     2, /* Char - the minimum length */ \
806     2, /* Charnc - the minimum length */ \
807     2, /* not */ \
808     /* Positive single-char repeats ** These are */ \
809     2, 2, 2, 2, 2, 2, /* *, *?, +, +?, ?, ?? ** minima in */ \
810     4, 4, 4, /* upto, minupto, exact ** UTF-8 mode */ \
811 nigel 93 2, 2, 2, 4, /* *+, ++, ?+, upto+ */ \
812 nigel 77 /* Negative single-char repeats - only for chars < 256 */ \
813     2, 2, 2, 2, 2, 2, /* NOT *, *?, +, +?, ?, ?? */ \
814     4, 4, 4, /* NOT upto, minupto, exact */ \
815 nigel 93 2, 2, 2, 4, /* Possessive *, +, ?, upto */ \
816 nigel 77 /* Positive type repeats */ \
817     2, 2, 2, 2, 2, 2, /* Type *, *?, +, +?, ?, ?? */ \
818     4, 4, 4, /* Type upto, minupto, exact */ \
819 nigel 93 2, 2, 2, 4, /* Possessive *+, ++, ?+, upto+ */ \
820 nigel 77 /* Character class & ref repeats */ \
821     1, 1, 1, 1, 1, 1, /* *, *?, +, +?, ?, ?? */ \
822     5, 5, /* CRRANGE, CRMINRANGE */ \
823     33, /* CLASS */ \
824     33, /* NCLASS */ \
825     0, /* XCLASS - variable length */ \
826     3, /* REF */ \
827     1+LINK_SIZE, /* RECURSE */ \
828     2+2*LINK_SIZE, /* CALLOUT */ \
829     1+LINK_SIZE, /* Alt */ \
830     1+LINK_SIZE, /* Ket */ \
831     1+LINK_SIZE, /* KetRmax */ \
832     1+LINK_SIZE, /* KetRmin */ \
833     1+LINK_SIZE, /* Assert */ \
834     1+LINK_SIZE, /* Assert not */ \
835     1+LINK_SIZE, /* Assert behind */ \
836     1+LINK_SIZE, /* Assert behind not */ \
837     1+LINK_SIZE, /* Reverse */ \
838 nigel 93 1+LINK_SIZE, /* ONCE */ \
839     1+LINK_SIZE, /* BRA */ \
840     3+LINK_SIZE, /* CBRA */ \
841 nigel 77 1+LINK_SIZE, /* COND */ \
842 nigel 93 1+LINK_SIZE, /* SBRA */ \
843     3+LINK_SIZE, /* SCBRA */ \
844     1+LINK_SIZE, /* SCOND */ \
845 nigel 77 3, /* CREF */ \
846 nigel 93 3, /* RREF */ \
847     1, /* DEF */ \
848 nigel 77 1, 1, /* BRAZERO, BRAMINZERO */ \
849    
850    
851 nigel 93 /* A magic value for OP_RREF to indicate the "any recursion" condition. */
852 nigel 77
853 nigel 93 #define RREF_ANY 0xffff
854 nigel 77
855     /* Error code numbers. They are given names so that they can more easily be
856     tracked. */
857    
858     enum { ERR0, ERR1, ERR2, ERR3, ERR4, ERR5, ERR6, ERR7, ERR8, ERR9,
859     ERR10, ERR11, ERR12, ERR13, ERR14, ERR15, ERR16, ERR17, ERR18, ERR19,
860     ERR20, ERR21, ERR22, ERR23, ERR24, ERR25, ERR26, ERR27, ERR28, ERR29,
861     ERR30, ERR31, ERR32, ERR33, ERR34, ERR35, ERR36, ERR37, ERR38, ERR39,
862 nigel 91 ERR40, ERR41, ERR42, ERR43, ERR44, ERR45, ERR46, ERR47, ERR48, ERR49,
863 ph10 166 ERR50, ERR51, ERR52, ERR53, ERR54, ERR55, ERR56, ERR57, ERR58 };
864 nigel 77
865     /* The real format of the start of the pcre block; the index of names and the
866     code vector run on as long as necessary after the end. We store an explicit
867     offset to the name table so that if a regex is compiled on one host, saved, and
868     then run on another where the size of pointers is different, all might still
869     be well. For the case of compiled-on-4 and run-on-8, we include an extra
870     pointer that is always NULL. For future-proofing, a few dummy fields were
871     originally included - even though you can never get this planning right - but
872     there is only one left now.
873    
874     NOTE NOTE NOTE:
875     Because people can now save and re-use compiled patterns, any additions to this
876     structure should be made at the end, and something earlier (e.g. a new
877     flag in the options or one of the dummy fields) should indicate that the new
878     fields are present. Currently PCRE always sets the dummy fields to zero.
879     NOTE NOTE NOTE:
880     */
881    
882     typedef struct real_pcre {
883     pcre_uint32 magic_number;
884     pcre_uint32 size; /* Total that was malloced */
885     pcre_uint32 options;
886     pcre_uint32 dummy1; /* For future use, maybe */
887    
888     pcre_uint16 top_bracket;
889     pcre_uint16 top_backref;
890     pcre_uint16 first_byte;
891     pcre_uint16 req_byte;
892     pcre_uint16 name_table_offset; /* Offset to name table that follows */
893     pcre_uint16 name_entry_size; /* Size of any name items */
894     pcre_uint16 name_count; /* Number of name items */
895     pcre_uint16 ref_count; /* Reference count */
896    
897     const unsigned char *tables; /* Pointer to tables or NULL for std */
898     const unsigned char *nullpad; /* NULL padding */
899     } real_pcre;
900    
901     /* The format of the block used to store data from pcre_study(). The same
902     remark (see NOTE above) about extending this structure applies. */
903    
904     typedef struct pcre_study_data {
905     pcre_uint32 size; /* Total that was malloced */
906     pcre_uint32 options;
907     uschar start_bits[32];
908     } pcre_study_data;
909    
910     /* Structure for passing "static" information around between the functions
911     doing the compiling, so that they are thread-safe. */
912    
913     typedef struct compile_data {
914     const uschar *lcc; /* Points to lower casing table */
915     const uschar *fcc; /* Points to case-flipping table */
916     const uschar *cbits; /* Points to character type table */
917     const uschar *ctypes; /* Points to table of type maps */
918 nigel 93 const uschar *start_workspace;/* The start of working space */
919 nigel 77 const uschar *start_code; /* The start of the compiled code */
920     const uschar *start_pattern; /* The start of the pattern */
921 nigel 93 const uschar *end_pattern; /* The end of the pattern */
922     uschar *hwm; /* High watermark of workspace */
923 nigel 77 uschar *name_table; /* The name/number table */
924     int names_found; /* Number of entries so far */
925     int name_entry_size; /* Size of each entry */
926 nigel 93 int bracount; /* Count of capturing parens */
927 nigel 77 int top_backref; /* Maximum back reference */
928     unsigned int backref_map; /* Bitmap of low back refs */
929 nigel 93 int external_options; /* External (initial) options */
930 nigel 77 int req_varyopt; /* "After variable item" flag for reqbyte */
931     BOOL nopartial; /* Set TRUE if partial won't work */
932 nigel 93 int nltype; /* Newline type */
933     int nllen; /* Newline string length */
934     uschar nl[4]; /* Newline string when fixed length */
935 nigel 77 } compile_data;
936    
937     /* Structure for maintaining a chain of pointers to the currently incomplete
938     branches, for testing for left recursion. */
939    
940     typedef struct branch_chain {
941     struct branch_chain *outer;
942     uschar *current;
943     } branch_chain;
944    
945     /* Structure for items in a linked list that represents an explicit recursive
946     call within the pattern. */
947    
948     typedef struct recursion_info {
949     struct recursion_info *prevrec; /* Previous recursion record (or NULL) */
950     int group_num; /* Number of group that was called */
951     const uschar *after_call; /* "Return value": points after the call in the expr */
952 ph10 168 USPTR save_start; /* Old value of mstart */
953 nigel 77 int *offset_save; /* Pointer to start of saved offsets */
954     int saved_max; /* Number of saved offsets */
955     } recursion_info;
956    
957 nigel 93 /* Structure for building a chain of data for holding the values of the subject
958     pointer at the start of each subpattern, so as to detect when an empty string
959     has been matched by a subpattern - to break infinite loops. */
960    
961     typedef struct eptrblock {
962     struct eptrblock *epb_prev;
963     USPTR epb_saved_eptr;
964     } eptrblock;
965    
966    
967 nigel 77 /* Structure for passing "static" information around between the functions
968     doing traditional NFA matching, so that they are thread-safe. */
969    
970     typedef struct match_data {
971 nigel 87 unsigned long int match_call_count; /* As it says */
972     unsigned long int match_limit; /* As it says */
973     unsigned long int match_limit_recursion; /* As it says */
974 nigel 77 int *offset_vector; /* Offset vector */
975     int offset_end; /* One past the end */
976     int offset_max; /* The maximum usable for return data */
977 nigel 93 int nltype; /* Newline type */
978     int nllen; /* Newline string length */
979     uschar nl[4]; /* Newline string when fixed */
980 nigel 77 const uschar *lcc; /* Points to lower casing table */
981     const uschar *ctypes; /* Points to table of type maps */
982     BOOL offset_overflow; /* Set if too many extractions */
983     BOOL notbol; /* NOTBOL flag */
984     BOOL noteol; /* NOTEOL flag */
985     BOOL utf8; /* UTF8 flag */
986     BOOL endonly; /* Dollar not before final \n */
987     BOOL notempty; /* Empty string match not wanted */
988     BOOL partial; /* PARTIAL flag */
989     BOOL hitend; /* Hit the end of the subject at some point */
990     const uschar *start_code; /* For use when recursing */
991 nigel 87 USPTR start_subject; /* Start of the subject string */
992     USPTR end_subject; /* End of the subject string */
993 ph10 168 USPTR start_match_ptr; /* Start of matched string */
994 nigel 87 USPTR end_match_ptr; /* Subject position at end match */
995 nigel 77 int end_offset_top; /* Highwater mark at end of match */
996     int capture_last; /* Most recent capture number */
997     int start_offset; /* The start offset value */
998 nigel 93 eptrblock *eptrchain; /* Chain of eptrblocks for tail recursions */
999     int eptrn; /* Next free eptrblock */
1000 nigel 77 recursion_info *recursive; /* Linked list of recursion data */
1001     void *callout_data; /* To pass back to callouts */
1002     } match_data;
1003    
1004     /* A similar structure is used for the same purpose by the DFA matching
1005     functions. */
1006    
1007     typedef struct dfa_match_data {
1008     const uschar *start_code; /* Start of the compiled pattern */
1009     const uschar *start_subject; /* Start of the subject string */
1010     const uschar *end_subject; /* End of subject string */
1011     const uschar *tables; /* Character tables */
1012     int moptions; /* Match options */
1013     int poptions; /* Pattern options */
1014 nigel 93 int nltype; /* Newline type */
1015     int nllen; /* Newline string length */
1016     uschar nl[4]; /* Newline string when fixed */
1017 nigel 77 void *callout_data; /* To pass back to callouts */
1018     } dfa_match_data;
1019    
1020     /* Bit definitions for entries in the pcre_ctypes table. */
1021    
1022     #define ctype_space 0x01
1023     #define ctype_letter 0x02
1024     #define ctype_digit 0x04
1025     #define ctype_xdigit 0x08
1026     #define ctype_word 0x10 /* alphameric or '_' */
1027     #define ctype_meta 0x80 /* regexp meta char or zero (end pattern) */
1028    
1029     /* Offsets for the bitmap tables in pcre_cbits. Each table contains a set
1030     of bits for a class map. Some classes are built by combining these tables. */
1031    
1032     #define cbit_space 0 /* [:space:] or \s */
1033     #define cbit_xdigit 32 /* [:xdigit:] */
1034     #define cbit_digit 64 /* [:digit:] or \d */
1035     #define cbit_upper 96 /* [:upper:] */
1036     #define cbit_lower 128 /* [:lower:] */
1037     #define cbit_word 160 /* [:word:] or \w */
1038     #define cbit_graph 192 /* [:graph:] */
1039     #define cbit_print 224 /* [:print:] */
1040     #define cbit_punct 256 /* [:punct:] */
1041     #define cbit_cntrl 288 /* [:cntrl:] */
1042     #define cbit_length 320 /* Length of the cbits table */
1043    
1044     /* Offsets of the various tables from the base tables pointer, and
1045     total length. */
1046    
1047     #define lcc_offset 0
1048     #define fcc_offset 256
1049     #define cbits_offset 512
1050     #define ctypes_offset (cbits_offset + cbit_length)
1051     #define tables_length (ctypes_offset + 256)
1052    
1053 nigel 87 /* Layout of the UCP type table that translates property names into types and
1054     codes. */
1055 nigel 77
1056     typedef struct {
1057     const char *name;
1058 nigel 87 pcre_uint16 type;
1059     pcre_uint16 value;
1060 nigel 77 } ucp_type_table;
1061    
1062    
1063     /* Internal shared data tables. These are tables that are used by more than one
1064     of the exported public functions. They have to be "external" in the C sense,
1065     but are not part of the PCRE public API. The data for these tables is in the
1066     pcre_tables.c module. */
1067    
1068     extern const int _pcre_utf8_table1[];
1069     extern const int _pcre_utf8_table2[];
1070     extern const int _pcre_utf8_table3[];
1071     extern const uschar _pcre_utf8_table4[];
1072    
1073     extern const int _pcre_utf8_table1_size;
1074    
1075     extern const ucp_type_table _pcre_utt[];
1076     extern const int _pcre_utt_size;
1077    
1078     extern const uschar _pcre_default_tables[];
1079    
1080     extern const uschar _pcre_OP_lengths[];
1081    
1082    
1083     /* Internal shared functions. These are functions that are used by more than
1084     one of the exported public functions. They have to be "external" in the C
1085     sense, but are not part of the PCRE public API. */
1086    
1087 ph10 150 extern BOOL _pcre_is_newline(const uschar *, int, const uschar *,
1088 ph10 149 int *, BOOL);
1089 nigel 93 extern int _pcre_ord2utf8(int, uschar *);
1090     extern real_pcre *_pcre_try_flipped(const real_pcre *, real_pcre *,
1091     const pcre_study_data *, pcre_study_data *);
1092     extern int _pcre_ucp_findprop(const unsigned int, int *, int *);
1093     extern unsigned int _pcre_ucp_othercase(const unsigned int);
1094     extern int _pcre_valid_utf8(const uschar *, int);
1095 ph10 150 extern BOOL _pcre_was_newline(const uschar *, int, const uschar *,
1096 ph10 149 int *, BOOL);
1097 nigel 93 extern BOOL _pcre_xclass(int, const uschar *);
1098 nigel 77
1099 nigel 85 #endif
1100    
1101 nigel 77 /* End of pcre_internal.h */

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