/[pcre]/code/trunk/pcre_internal.h
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revision 77 by nigel, Sat Feb 24 21:40:45 2007 UTC revision 230 by ph10, Mon Sep 10 13:23:56 2007 UTC
# Line 7  Line 7 
7  and semantics are as close as possible to those of the Perl 5 language.  and semantics are as close as possible to those of the Perl 5 language.
8    
9                         Written by Philip Hazel                         Written by Philip Hazel
10             Copyright (c) 1997-2005 University of Cambridge             Copyright (c) 1997-2007 University of Cambridge
11    
12  -----------------------------------------------------------------------------  -----------------------------------------------------------------------------
13  Redistribution and use in source and binary forms, with or without  Redistribution and use in source and binary forms, with or without
# Line 42  POSSIBILITY OF SUCH DAMAGE. Line 42  POSSIBILITY OF SUCH DAMAGE.
42  modules, but which are not relevant to the exported API. This includes some  modules, but which are not relevant to the exported API. This includes some
43  functions whose names all begin with "_pcre_". */  functions whose names all begin with "_pcre_". */
44    
45    #ifndef PCRE_INTERNAL_H
46    #define PCRE_INTERNAL_H
47    
48  /* Define DEBUG to get debugging output on stdout. */  /* Define DEBUG to get debugging output on stdout. */
49    
50  /****  #if 0
51  #define DEBUG  #define DEBUG
52  ****/  #endif
53    
54  /* Use a macro for debugging printing, 'cause that eliminates the use of #ifdef  /* 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  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  pre-processor statements, or at least there were when I first wrote this. After
57  all, it had only been about 10 years then... */  all, it had only been about 10 years then...
58    
59    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  #ifdef DEBUG  #ifdef DEBUG
64  #define DPRINTF(p) printf p  #define DPRINTF(p) printf p
65  #else  #else
66  #define DPRINTF(p) /*nothing*/  #define DPRINTF(p) /* Nothing */
67  #endif  #endif
68    
69    
 /* Get the definitions provided by running "configure" */  
   
 #include "config.h"  
   
70  /* Standard C headers plus the external interface definition. The only time  /* Standard C headers plus the external interface definition. The only time
71  setjmp and stdarg are used is when NO_RECURSE is set. */  setjmp and stdarg are used is when NO_RECURSE is set. */
72    
# Line 77  setjmp and stdarg are used is when NO_RE Line 79  setjmp and stdarg are used is when NO_RE
79  #include <stdlib.h>  #include <stdlib.h>
80  #include <string.h>  #include <string.h>
81    
82  #ifndef PCRE_SPY  /* When compiling a DLL for Windows, the exported symbols have to be declared
83  #define PCRE_DEFINITION       /* Win32 __declspec(export) trigger for .dll */  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    information there, using __declspec(dllexport) without "extern" we have a
86    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    which is all that is needed for applications (they just import the symbols). We
89    use:
90    
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    internals, can #include pcre.h first to get an application's-eye view.
103    
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    #    ifndef PCRE_STATIC
112    #      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  #endif  #endif
134    
135  /* We need to have types that specify unsigned 16-bit and 32-bit integers. We  /* We need to have types that specify unsigned 16-bit and 32-bit integers. We
# Line 112  Unix, where it is defined in sys/types, Line 163  Unix, where it is defined in sys/types,
163    
164  typedef unsigned char uschar;  typedef unsigned char uschar;
165    
166  /* Include the public PCRE header */  /* 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    
170    #define NOTACHAR 0xffffffff
171    
172    /* PCRE is able to support several different kinds of newline (CR, LF, CRLF,
173    "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    
178    #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    
182    /* This macro checks for a newline at the given position */
183    
184    #define IS_NEWLINE(p) \
185      ((NLBLOCK->nltype != NLTYPE_FIXED)? \
186        ((p) < NLBLOCK->PSEND && \
187         _pcre_is_newline((p), NLBLOCK->nltype, NLBLOCK->PSEND, &(NLBLOCK->nllen),\
188           utf8)) \
189        : \
190        ((p) <= NLBLOCK->PSEND - NLBLOCK->nllen && \
191         (p)[0] == NLBLOCK->nl[0] && \
192         (NLBLOCK->nllen == 1 || (p)[1] == NLBLOCK->nl[1]) \
193        ) \
194      )
195    
196    /* 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         _pcre_was_newline((p), NLBLOCK->nltype, NLBLOCK->PSSTART, \
202           &(NLBLOCK->nllen), utf8)) \
203        : \
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    /* 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    
 #include "pcre.h"  
228    
229  /* Include the (copy of) the public ucp header, changing the external name into  /* Include the public PCRE header and the definitions of UCP character property
230  a private one. This does no harm, even if we aren't compiling UCP support. */  values. */
231    
232  #define ucp_findchar _pcre_ucp_findchar  #include "pcre.h"
233  #include "ucp.h"  #include "ucp.h"
234    
235  /* When compiling for use with the Virtual Pascal compiler, these functions  /* When compiling for use with the Virtual Pascal compiler, these functions
# Line 127  need to have their names changed. PCRE m Line 237  need to have their names changed. PCRE m
237  option on the command line. */  option on the command line. */
238    
239  #ifdef VPCOMPAT  #ifdef VPCOMPAT
240    #define strlen(s)        _strlen(s)
241  #define strncmp(s1,s2,m) _strncmp(s1,s2,m)  #define strncmp(s1,s2,m) _strncmp(s1,s2,m)
242    #define memcmp(s,c,n)    _memcmp(s,c,n)
243  #define memcpy(d,s,n)    _memcpy(d,s,n)  #define memcpy(d,s,n)    _memcpy(d,s,n)
244  #define memmove(d,s,n)   _memmove(d,s,n)  #define memmove(d,s,n)   _memmove(d,s,n)
245  #define memset(s,c,n)    _memset(s,c,n)  #define memset(s,c,n)    _memset(s,c,n)
# Line 136  option on the command line. */ Line 248  option on the command line. */
248  /* To cope with SunOS4 and other systems that lack memmove() but have bcopy(),  /* 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  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  is set. Otherwise, include an emulating function for those systems that have
251  neither (there some non-Unix environments where this is the case). This assumes  neither (there some non-Unix environments where this is the case). */
 that all calls to memmove are moving strings upwards in store, which is the  
 case in PCRE. */  
252    
253  #if ! HAVE_MEMMOVE  #ifndef HAVE_MEMMOVE
254  #undef  memmove        /* some systems may have a macro */  #undef  memmove        /* some systems may have a macro */
255  #if HAVE_BCOPY  #ifdef HAVE_BCOPY
256  #define memmove(a, b, c) bcopy(b, a, c)  #define memmove(a, b, c) bcopy(b, a, c)
257  #else  /* HAVE_BCOPY */  #else  /* HAVE_BCOPY */
258  void *  static void *
259  pcre_memmove(unsigned char *dest, const unsigned char *src, size_t n)  pcre_memmove(void *d, const void *s, size_t n)
260  {  {
261  int i;  size_t i;
262  dest += n;  unsigned char *dest = (unsigned char *)d;
263  src += n;  const unsigned char *src = (const unsigned char *)s;
264  for (i = 0; i < n; ++i) *(--dest) =  *(--src);  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      return (void *)(dest - n);
275      }
276  }  }
277  #define memmove(a, b, c) pcre_memmove(a, b, c)  #define memmove(a, b, c) pcre_memmove(a, b, c)
278  #endif   /* not HAVE_BCOPY */  #endif   /* not HAVE_BCOPY */
# Line 237  capturing parenthesis numbers in back re Line 358  capturing parenthesis numbers in back re
358    
359  /* When UTF-8 encoding is being used, a character is no longer just a single  /* 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  byte. The macros for character handling generate simple sequences when used in
361  byte-mode, and more complicated ones for UTF-8 characters. */  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    
365  #ifndef SUPPORT_UTF8  #ifndef SUPPORT_UTF8
366  #define GETCHAR(c, eptr) c = *eptr;  #define GETCHAR(c, eptr) c = *eptr;
# Line 245  byte-mode, and more complicated ones for Line 368  byte-mode, and more complicated ones for
368  #define GETCHARINC(c, eptr) c = *eptr++;  #define GETCHARINC(c, eptr) c = *eptr++;
369  #define GETCHARINCTEST(c, eptr) c = *eptr++;  #define GETCHARINCTEST(c, eptr) c = *eptr++;
370  #define GETCHARLEN(c, eptr, len) c = *eptr;  #define GETCHARLEN(c, eptr, len) c = *eptr;
371  #define BACKCHAR(eptr)  /* #define BACKCHAR(eptr) */
372    
373  #else   /* SUPPORT_UTF8 */  #else   /* SUPPORT_UTF8 */
374    
# Line 254  we know we are in UTF-8 mode. */ Line 377  we know we are in UTF-8 mode. */
377    
378  #define GETCHAR(c, eptr) \  #define GETCHAR(c, eptr) \
379    c = *eptr; \    c = *eptr; \
380    if ((c & 0xc0) == 0xc0) \    if (c >= 0xc0) \
381      { \      { \
382      int gcii; \      int gcii; \
383      int gcaa = _pcre_utf8_table4[c & 0x3f];  /* Number of additional bytes */ \      int gcaa = _pcre_utf8_table4[c & 0x3f];  /* Number of additional bytes */ \
# Line 272  pointer. */ Line 395  pointer. */
395    
396  #define GETCHARTEST(c, eptr) \  #define GETCHARTEST(c, eptr) \
397    c = *eptr; \    c = *eptr; \
398    if (utf8 && (c & 0xc0) == 0xc0) \    if (utf8 && c >= 0xc0) \
399      { \      { \
400      int gcii; \      int gcii; \
401      int gcaa = _pcre_utf8_table4[c & 0x3f];  /* Number of additional bytes */ \      int gcaa = _pcre_utf8_table4[c & 0x3f];  /* Number of additional bytes */ \
# Line 290  know we are in UTF-8 mode. */ Line 413  know we are in UTF-8 mode. */
413    
414  #define GETCHARINC(c, eptr) \  #define GETCHARINC(c, eptr) \
415    c = *eptr++; \    c = *eptr++; \
416    if ((c & 0xc0) == 0xc0) \    if (c >= 0xc0) \
417      { \      { \
418      int gcaa = _pcre_utf8_table4[c & 0x3f];  /* Number of additional bytes */ \      int gcaa = _pcre_utf8_table4[c & 0x3f];  /* Number of additional bytes */ \
419      int gcss = 6*gcaa; \      int gcss = 6*gcaa; \
# Line 306  know we are in UTF-8 mode. */ Line 429  know we are in UTF-8 mode. */
429    
430  #define GETCHARINCTEST(c, eptr) \  #define GETCHARINCTEST(c, eptr) \
431    c = *eptr++; \    c = *eptr++; \
432    if (utf8 && (c & 0xc0) == 0xc0) \    if (utf8 && c >= 0xc0) \
433      { \      { \
434      int gcaa = _pcre_utf8_table4[c & 0x3f];  /* Number of additional bytes */ \      int gcaa = _pcre_utf8_table4[c & 0x3f];  /* Number of additional bytes */ \
435      int gcss = 6*gcaa; \      int gcss = 6*gcaa; \
# Line 323  if there are extra bytes. This is called Line 446  if there are extra bytes. This is called
446    
447  #define GETCHARLEN(c, eptr, len) \  #define GETCHARLEN(c, eptr, len) \
448    c = *eptr; \    c = *eptr; \
449    if ((c & 0xc0) == 0xc0) \    if (c >= 0xc0) \
450      { \      { \
451      int gcii; \      int gcii; \
452      int gcaa = _pcre_utf8_table4[c & 0x3f];  /* Number of additional bytes */ \      int gcaa = _pcre_utf8_table4[c & 0x3f];  /* Number of additional bytes */ \
# Line 338  if there are extra bytes. This is called Line 461  if there are extra bytes. This is called
461      }      }
462    
463  /* If the pointer is not at the start of a character, move it back until  /* If the pointer is not at the start of a character, move it back until
464  it is. Called only in UTF-8 mode. */  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    
467  #define BACKCHAR(eptr) while((*eptr & 0xc0) == 0x80) eptr--;  #define BACKCHAR(eptr) while((*eptr & 0xc0) == 0x80) eptr--
468    
469  #endif  #endif
470    
# Line 357  Standard C system should have one. */ Line 481  Standard C system should have one. */
481    
482  #define PCRE_IMS (PCRE_CASELESS|PCRE_MULTILINE|PCRE_DOTALL)  #define PCRE_IMS (PCRE_CASELESS|PCRE_MULTILINE|PCRE_DOTALL)
483    
484  /* Private options flags start at the most significant end of the four bytes,  /* Private flags containing information about the compiled regex. They used to
485  but skip the top bit so we can use ints for convenience without getting tangled  live at the top end of the options word, but that got almost full, so now they
486  with negative values. The public options defined in pcre.h start at the least  are in a 16-bit flags word. */
487  significant end. Make sure they don't overlap! */  
488    #define PCRE_NOPARTIAL     0x0001  /* can't use partial with this regex */
489  #define PCRE_FIRSTSET      0x40000000  /* first_byte is set */  #define PCRE_FIRSTSET      0x0002  /* first_byte is set */
490  #define PCRE_REQCHSET      0x20000000  /* req_byte is set */  #define PCRE_REQCHSET      0x0004  /* req_byte is set */
491  #define PCRE_STARTLINE     0x10000000  /* start after \n for multiline */  #define PCRE_STARTLINE     0x0008  /* start after \n for multiline */
492  #define PCRE_ICHANGED      0x08000000  /* i option changes within regex */  #define PCRE_JCHANGED      0x0010  /* j option used in regex */
493  #define PCRE_NOPARTIAL     0x04000000  /* can't use partial with this regex */  #define PCRE_HASCRORLF     0x0020  /* explicit \r or \n in pattern */
494    
495  /* Options for the "extra" block produced by pcre_study(). */  /* Options for the "extra" block produced by pcre_study(). */
496    
# Line 375  significant end. Make sure they don't ov Line 499  significant end. Make sure they don't ov
499  /* Masks for identifying the public options that are permitted at compile  /* Masks for identifying the public options that are permitted at compile
500  time, run time, or study time, respectively. */  time, run time, or study time, respectively. */
501    
502    #define PCRE_NEWLINE_BITS (PCRE_NEWLINE_CR|PCRE_NEWLINE_LF|PCRE_NEWLINE_ANY| \
503                               PCRE_NEWLINE_ANYCRLF)
504    
505  #define PUBLIC_OPTIONS \  #define PUBLIC_OPTIONS \
506    (PCRE_CASELESS|PCRE_EXTENDED|PCRE_ANCHORED|PCRE_MULTILINE| \    (PCRE_CASELESS|PCRE_EXTENDED|PCRE_ANCHORED|PCRE_MULTILINE| \
507     PCRE_DOTALL|PCRE_DOLLAR_ENDONLY|PCRE_EXTRA|PCRE_UNGREEDY|PCRE_UTF8| \     PCRE_DOTALL|PCRE_DOLLAR_ENDONLY|PCRE_EXTRA|PCRE_UNGREEDY|PCRE_UTF8| \
508     PCRE_NO_AUTO_CAPTURE|PCRE_NO_UTF8_CHECK|PCRE_AUTO_CALLOUT|PCRE_FIRSTLINE)     PCRE_NO_AUTO_CAPTURE|PCRE_NO_UTF8_CHECK|PCRE_AUTO_CALLOUT|PCRE_FIRSTLINE| \
509       PCRE_DUPNAMES|PCRE_NEWLINE_BITS)
510    
511  #define PUBLIC_EXEC_OPTIONS \  #define PUBLIC_EXEC_OPTIONS \
512    (PCRE_ANCHORED|PCRE_NOTBOL|PCRE_NOTEOL|PCRE_NOTEMPTY|PCRE_NO_UTF8_CHECK| \    (PCRE_ANCHORED|PCRE_NOTBOL|PCRE_NOTEOL|PCRE_NOTEMPTY|PCRE_NO_UTF8_CHECK| \
513     PCRE_PARTIAL)     PCRE_PARTIAL|PCRE_NEWLINE_BITS)
514    
515  #define PUBLIC_DFA_EXEC_OPTIONS \  #define PUBLIC_DFA_EXEC_OPTIONS \
516    (PCRE_ANCHORED|PCRE_NOTBOL|PCRE_NOTEOL|PCRE_NOTEMPTY|PCRE_NO_UTF8_CHECK| \    (PCRE_ANCHORED|PCRE_NOTBOL|PCRE_NOTEOL|PCRE_NOTEMPTY|PCRE_NO_UTF8_CHECK| \
517     PCRE_PARTIAL|PCRE_DFA_SHORTEST|PCRE_DFA_RESTART)     PCRE_PARTIAL|PCRE_DFA_SHORTEST|PCRE_DFA_RESTART|PCRE_NEWLINE_BITS)
518    
519  #define PUBLIC_STUDY_OPTIONS 0   /* None defined */  #define PUBLIC_STUDY_OPTIONS 0   /* None defined */
520    
# Line 418  typedef int BOOL; Line 546  typedef int BOOL;
546  #define FALSE   0  #define FALSE   0
547  #define TRUE    1  #define TRUE    1
548    
549  /* Escape items that are just an encoding of a particular data value. Note that  /* Escape items that are just an encoding of a particular data value. */
 ESC_n is defined as yet another macro, which is set in config.h to either \n  
 (the default) or \r (which some people want). */  
550    
551  #ifndef ESC_e  #ifndef ESC_e
552  #define ESC_e 27  #define ESC_e 27
# Line 431  ESC_n is defined as yet another macro, w Line 557  ESC_n is defined as yet another macro, w
557  #endif  #endif
558    
559  #ifndef ESC_n  #ifndef ESC_n
560  #define ESC_n NEWLINE  #define ESC_n '\n'
561  #endif  #endif
562    
563  #ifndef ESC_r  #ifndef ESC_r
# Line 445  ESC_n is defined as yet another macro, w Line 571  ESC_n is defined as yet another macro, w
571  #define ESC_tee '\t'  #define ESC_tee '\t'
572  #endif  #endif
573    
574  /* These are escaped items that aren't just an encoding of a particular data  /* Codes for different types of Unicode property */
 value such as \n. They must have non-zero values, as check_escape() returns  
 their negation. Also, they must appear in the same order as in the opcode  
 definitions below, up to ESC_z. There's a dummy for OP_ANY because it  
 corresponds to "." rather than an escape sequence. The final one must be  
 ESC_REF as subsequent values are used for \1, \2, \3, etc. There is are two  
 tests in the code for an escape greater than ESC_b and less than ESC_Z to  
 detect the types that may be repeated. These are the types that consume  
 characters. If any new escapes are put in between that don't consume a  
 character, that code will have to change. */  
575    
576  enum { ESC_A = 1, ESC_G, ESC_B, ESC_b, ESC_D, ESC_d, ESC_S, ESC_s, ESC_W,  #define PT_ANY        0    /* Any property - matches all chars */
577         ESC_w, ESC_dum1, ESC_C, ESC_P, ESC_p, ESC_X, ESC_Z, ESC_z, ESC_E,  #define PT_LAMP       1    /* L& - the union of Lu, Ll, Lt */
578         ESC_Q, ESC_REF };  #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  /* Flag bits and data types for the extended class (OP_XCLASS) for classes that
583  contain UTF-8 characters with values greater than 255. */  contain UTF-8 characters with values greater than 255. */
# Line 469  contain UTF-8 characters with values gre Line 588  contain UTF-8 characters with values gre
588  #define XCL_END       0    /* Marks end of individual items */  #define XCL_END       0    /* Marks end of individual items */
589  #define XCL_SINGLE    1    /* Single item (one multibyte char) follows */  #define XCL_SINGLE    1    /* Single item (one multibyte char) follows */
590  #define XCL_RANGE     2    /* A range (two multibyte chars) follows */  #define XCL_RANGE     2    /* A range (two multibyte chars) follows */
591  #define XCL_PROP      3    /* Unicode property (one property code) follows */  #define XCL_PROP      3    /* Unicode property (2-byte property code follows) */
592  #define XCL_NOTPROP   4    /* Unicode inverted property (ditto) */  #define XCL_NOTPROP   4    /* Unicode inverted property (ditto) */
593    
594    /* 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    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    character, that code will have to change. */
604    
605  /* Opcode table: OP_BRA must be last, as all values >= it are used for brackets  enum { ESC_A = 1, ESC_G, ESC_K, ESC_B, ESC_b, ESC_D, ESC_d, ESC_S, ESC_s,
606  that extract substrings. Starting from 1 (i.e. after OP_END), the values up to         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    
609    
610    /* Opcode table: Starting from 1 (i.e. after OP_END), the values up to
611  OP_EOD must correspond in order to the list of escapes immediately above.  OP_EOD must correspond in order to the list of escapes immediately above.
612  Note that whenever this list is updated, the two macro definitions that follow  
613  must also be updated to match. */  *** 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  enum {  enum {
618    OP_END,            /* 0 End of pattern */    OP_END,            /* 0 End of pattern */
# Line 486  enum { Line 621  enum {
621    
622    OP_SOD,            /* 1 Start of data: \A */    OP_SOD,            /* 1 Start of data: \A */
623    OP_SOM,            /* 2 Start of match (subject + offset): \G */    OP_SOM,            /* 2 Start of match (subject + offset): \G */
624    OP_NOT_WORD_BOUNDARY,  /*  3 \B */    OP_SET_SOM,        /* 3 Set start of match (\K) */
625    OP_WORD_BOUNDARY,      /*  4 \b */    OP_NOT_WORD_BOUNDARY,  /*  4 \B */
626    OP_NOT_DIGIT,          /*  5 \D */    OP_WORD_BOUNDARY,      /*  5 \b */
627    OP_DIGIT,              /*  6 \d */    OP_NOT_DIGIT,          /*  6 \D */
628    OP_NOT_WHITESPACE,     /*  7 \S */    OP_DIGIT,              /*  7 \d */
629    OP_WHITESPACE,         /*  8 \s */    OP_NOT_WHITESPACE,     /*  8 \S */
630    OP_NOT_WORDCHAR,       /*  9 \W */    OP_WHITESPACE,         /*  9 \s */
631    OP_WORDCHAR,           /* 10 \w */    OP_NOT_WORDCHAR,       /* 10 \W */
632    OP_ANY,            /* 11 Match any character */    OP_WORDCHAR,           /* 11 \w */
633    OP_ANYBYTE,        /* 12 Match any byte (\C); different to OP_ANY for UTF-8 */    OP_ANY,            /* 12 Match any character */
634    OP_NOTPROP,        /* 13 \P (not Unicode property) */    OP_ANYBYTE,        /* 13 Match any byte (\C); different to OP_ANY for UTF-8 */
635    OP_PROP,           /* 14 \p (Unicode property) */    OP_NOTPROP,        /* 14 \P (not Unicode property) */
636    OP_EXTUNI,         /* 15 \X (extended Unicode sequence */    OP_PROP,           /* 15 \p (Unicode property) */
637    OP_EODN,           /* 16 End of data or \n at end of data: \Z. */    OP_ANYNL,          /* 16 \R (any newline sequence) */
638    OP_EOD,            /* 17 End of data: \z */    OP_NOT_HSPACE,     /* 17 \H (not horizontal whitespace) */
639      OP_HSPACE,         /* 18 \h (horizontal whitespace) */
640    OP_OPT,            /* 18 Set runtime options */    OP_NOT_VSPACE,     /* 19 \V (not vertical whitespace) */
641    OP_CIRC,           /* 19 Start of line - varies with multiline switch */    OP_VSPACE,         /* 20 \v (vertical whitespace) */
642    OP_DOLL,           /* 20 End of line - varies with multiline switch */    OP_EXTUNI,         /* 21 \X (extended Unicode sequence */
643    OP_CHAR,           /* 21 Match one character, casefully */    OP_EODN,           /* 22 End of data or \n at end of data: \Z. */
644    OP_CHARNC,         /* 22 Match one character, caselessly */    OP_EOD,            /* 23 End of data: \z */
645    OP_NOT,            /* 23 Match anything but the following char */  
646      OP_OPT,            /* 24 Set runtime options */
647    OP_STAR,           /* 24 The maximizing and minimizing versions of */    OP_CIRC,           /* 25 Start of line - varies with multiline switch */
648    OP_MINSTAR,        /* 25 all these opcodes must come in pairs, with */    OP_DOLL,           /* 26 End of line - varies with multiline switch */
649    OP_PLUS,           /* 26 the minimizing one second. */    OP_CHAR,           /* 27 Match one character, casefully */
650    OP_MINPLUS,        /* 27 This first set applies to single characters */    OP_CHARNC,         /* 28 Match one character, caselessly */
651    OP_QUERY,          /* 28 */    OP_NOT,            /* 29 Match one character, not the following one */
652    OP_MINQUERY,       /* 29 */  
653    OP_UPTO,           /* 30 From 0 to n matches */    OP_STAR,           /* 30 The maximizing and minimizing versions of */
654    OP_MINUPTO,        /* 31 */    OP_MINSTAR,        /* 31 these six opcodes must come in pairs, with */
655    OP_EXACT,          /* 32 Exactly n matches */    OP_PLUS,           /* 32 the minimizing one second. */
656      OP_MINPLUS,        /* 33 This first set applies to single characters.*/
657    OP_NOTSTAR,        /* 33 The maximizing and minimizing versions of */    OP_QUERY,          /* 34 */
658    OP_NOTMINSTAR,     /* 34 all these opcodes must come in pairs, with */    OP_MINQUERY,       /* 35 */
659    OP_NOTPLUS,        /* 35 the minimizing one second. */  
660    OP_NOTMINPLUS,     /* 36 This set applies to "not" single characters */    OP_UPTO,           /* 36 From 0 to n matches */
661    OP_NOTQUERY,       /* 37 */    OP_MINUPTO,        /* 37 */
662    OP_NOTMINQUERY,    /* 38 */    OP_EXACT,          /* 38 Exactly n matches */
663    OP_NOTUPTO,        /* 39 From 0 to n matches */  
664    OP_NOTMINUPTO,     /* 40 */    OP_POSSTAR,        /* 39 Possessified star */
665    OP_NOTEXACT,       /* 41 Exactly n matches */    OP_POSPLUS,        /* 40 Possessified plus */
666      OP_POSQUERY,       /* 41 Posesssified query */
667    OP_TYPESTAR,       /* 42 The maximizing and minimizing versions of */    OP_POSUPTO,        /* 42 Possessified upto */
668    OP_TYPEMINSTAR,    /* 43 all these opcodes must come in pairs, with */  
669    OP_TYPEPLUS,       /* 44 the minimizing one second. These codes must */    OP_NOTSTAR,        /* 43 The maximizing and minimizing versions of */
670    OP_TYPEMINPLUS,    /* 45 be in exactly the same order as those above. */    OP_NOTMINSTAR,     /* 44 these six opcodes must come in pairs, with */
671    OP_TYPEQUERY,      /* 46 This set applies to character types such as \d */    OP_NOTPLUS,        /* 45 the minimizing one second. They must be in */
672    OP_TYPEMINQUERY,   /* 47 */    OP_NOTMINPLUS,     /* 46 exactly the same order as those above. */
673    OP_TYPEUPTO,       /* 48 From 0 to n matches */    OP_NOTQUERY,       /* 47 This set applies to "not" single characters. */
674    OP_TYPEMINUPTO,    /* 49 */    OP_NOTMINQUERY,    /* 48 */
675    OP_TYPEEXACT,      /* 50 Exactly n matches */  
676      OP_NOTUPTO,        /* 49 From 0 to n matches */
677    OP_CRSTAR,         /* 51 The maximizing and minimizing versions of */    OP_NOTMINUPTO,     /* 50 */
678    OP_CRMINSTAR,      /* 52 all these opcodes must come in pairs, with */    OP_NOTEXACT,       /* 51 Exactly n matches */
679    OP_CRPLUS,         /* 53 the minimizing one second. These codes must */  
680    OP_CRMINPLUS,      /* 54 be in exactly the same order as those above. */    OP_NOTPOSSTAR,     /* 52 Possessified versions */
681    OP_CRQUERY,        /* 55 These are for character classes and back refs */    OP_NOTPOSPLUS,     /* 53 */
682    OP_CRMINQUERY,     /* 56 */    OP_NOTPOSQUERY,    /* 54 */
683    OP_CRRANGE,        /* 57 These are different to the three sets above. */    OP_NOTPOSUPTO,     /* 55 */
684    OP_CRMINRANGE,     /* 58 */  
685      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    
692      OP_TYPEUPTO,       /* 62 From 0 to n matches */
693      OP_TYPEMINUPTO,    /* 63 */
694      OP_TYPEEXACT,      /* 64 Exactly n matches */
695    
696      OP_TYPEPOSSTAR,    /* 65 Possessified versions */
697      OP_TYPEPOSPLUS,    /* 66 */
698      OP_TYPEPOSQUERY,   /* 67 */
699      OP_TYPEPOSUPTO,    /* 68 */
700    
701      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    
710    OP_CLASS,          /* 59 Match a character class, chars < 256 only */    OP_CLASS,          /* 77 Match a character class, chars < 256 only */
711    OP_NCLASS,         /* 60 Same, but the bitmap was created from a negative    OP_NCLASS,         /* 78 Same, but the bitmap was created from a negative
712                             class - the difference is relevant only when a UTF-8                             class - the difference is relevant only when a UTF-8
713                             character > 255 is encountered. */                             character > 255 is encountered. */
714    
715    OP_XCLASS,         /* 61 Extended class for handling UTF-8 chars within the    OP_XCLASS,         /* 79 Extended class for handling UTF-8 chars within the
716                             class. This does both positive and negative. */                             class. This does both positive and negative. */
717    
718    OP_REF,            /* 62 Match a back reference */    OP_REF,            /* 80 Match a back reference */
719    OP_RECURSE,        /* 63 Match a numbered subpattern (possibly recursive) */    OP_RECURSE,        /* 81 Match a numbered subpattern (possibly recursive) */
720    OP_CALLOUT,        /* 64 Call out to external function if provided */    OP_CALLOUT,        /* 82 Call out to external function if provided */
721    
722    OP_ALT,            /* 65 Start of alternation */    OP_ALT,            /* 83 Start of alternation */
723    OP_KET,            /* 66 End of group that doesn't have an unbounded repeat */    OP_KET,            /* 84 End of group that doesn't have an unbounded repeat */
724    OP_KETRMAX,        /* 67 These two must remain together and in this */    OP_KETRMAX,        /* 85 These two must remain together and in this */
725    OP_KETRMIN,        /* 68 order. They are for groups the repeat for ever. */    OP_KETRMIN,        /* 86 order. They are for groups the repeat for ever. */
726    
727    /* The assertions must come before ONCE and COND */    /* The assertions must come before BRA, CBRA, ONCE, and COND.*/
728    
729    OP_ASSERT,         /* 69 Positive lookahead */    OP_ASSERT,         /* 87 Positive lookahead */
730    OP_ASSERT_NOT,     /* 70 Negative lookahead */    OP_ASSERT_NOT,     /* 88 Negative lookahead */
731    OP_ASSERTBACK,     /* 71 Positive lookbehind */    OP_ASSERTBACK,     /* 89 Positive lookbehind */
732    OP_ASSERTBACK_NOT, /* 72 Negative lookbehind */    OP_ASSERTBACK_NOT, /* 90 Negative lookbehind */
733    OP_REVERSE,        /* 73 Move pointer back - used in lookbehind assertions */    OP_REVERSE,        /* 91 Move pointer back - used in lookbehind assertions */
734    
735    /* ONCE and COND must come after the assertions, with ONCE first, as there's    /* ONCE, BRA, CBRA, and COND must come after the assertions, with ONCE first,
736    a test for >= ONCE for a subpattern that isn't an assertion. */    as there's a test for >= ONCE for a subpattern that isn't an assertion. */
737    
738    OP_ONCE,           /* 74 Once matched, don't back up into the subpattern */    OP_ONCE,           /* 92 Atomic group */
739    OP_COND,           /* 75 Conditional group */    OP_BRA,            /* 93 Start of non-capturing bracket */
740    OP_CREF,           /* 76 Used to hold an extraction string number (cond ref) */    OP_CBRA,           /* 94 Start of capturing bracket */
741      OP_COND,           /* 95 Conditional group */
742    OP_BRAZERO,        /* 77 These two must remain together and in this */  
743    OP_BRAMINZERO,     /* 78 order. */    /* These three must follow the previous three, in the same order. There's a
744      check for >= SBRA to distinguish the two sets. */
745    OP_BRANUMBER,      /* 79 Used for extracting brackets whose number is greater  
746                             than can fit into an opcode. */    OP_SBRA,           /* 96 Start of non-capturing bracket, check empty  */
747      OP_SCBRA,          /* 97 Start of capturing bracket, check empty */
748    OP_BRA             /* 80 This and greater values are used for brackets that    OP_SCOND,          /* 98 Conditional group, check empty */
                            extract substrings up to EXTRACT_BASIC_MAX. After  
                            that, use is made of OP_BRANUMBER. */  
 };  
749    
750  /* WARNING WARNING WARNING: There is an implicit assumption in pcre.c and    OP_CREF,           /* 99 Used to hold a capture number as condition */
751  study.c that all opcodes are less than 128 in value. This makes handling UTF-8    OP_RREF,           /* 100 Used to hold a recursion number as condition */
752  character sequences easier. */    OP_DEF,            /* 101 The DEFINE condition */
   
 /* The highest extraction number before we have to start using additional  
 bytes. (Originally PCRE didn't have support for extraction counts highter than  
 this number.) The value is limited by the number of opcodes left after OP_BRA,  
 i.e. 255 - OP_BRA. We actually set it a bit lower to leave room for additional  
 opcodes. */  
753    
754  #define EXTRACT_BASIC_MAX  100    OP_BRAZERO,        /* 102 These two must remain together and in this */
755      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    };
769    
770    
771  /* This macro defines textual names for all the opcodes. These are used only  /* 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. */  for debugging. The macro is referenced only in pcre_printint.c. */
773    
774  #define OP_NAME_LIST \  #define OP_NAME_LIST \
775    "End", "\\A", "\\G", "\\B", "\\b", "\\D", "\\d",                \    "End", "\\A", "\\G", "\\K", "\\B", "\\b", "\\D", "\\d",         \
776    "\\S", "\\s", "\\W", "\\w", "Any", "Anybyte",                   \    "\\S", "\\s", "\\W", "\\w", "Any", "Anybyte",                   \
777    "notprop", "prop", "extuni",                                    \    "notprop", "prop", "\\R", "\\H", "\\h", "\\V", "\\v",           \
778    "\\Z", "\\z",                                                   \    "extuni",  "\\Z", "\\z",                                        \
779    "Opt", "^", "$", "char", "charnc", "not",                       \    "Opt", "^", "$", "char", "charnc", "not",                       \
780    "*", "*?", "+", "+?", "?", "??", "{", "{", "{",                 \    "*", "*?", "+", "+?", "?", "??", "{", "{", "{",                 \
781      "*+","++", "?+", "{",                                           \
782    "*", "*?", "+", "+?", "?", "??", "{", "{", "{",                 \    "*", "*?", "+", "+?", "?", "??", "{", "{", "{",                 \
783      "*+","++", "?+", "{",                                           \
784    "*", "*?", "+", "+?", "?", "??", "{", "{", "{",                 \    "*", "*?", "+", "+?", "?", "??", "{", "{", "{",                 \
785      "*+","++", "?+", "{",                                           \
786    "*", "*?", "+", "+?", "?", "??", "{", "{",                      \    "*", "*?", "+", "+?", "?", "??", "{", "{",                      \
787    "class", "nclass", "xclass", "Ref", "Recurse", "Callout",       \    "class", "nclass", "xclass", "Ref", "Recurse", "Callout",       \
788    "Alt", "Ket", "KetRmax", "KetRmin", "Assert", "Assert not",     \    "Alt", "Ket", "KetRmax", "KetRmin", "Assert", "Assert not",     \
789    "AssertB", "AssertB not", "Reverse", "Once", "Cond", "Cond ref",\    "AssertB", "AssertB not", "Reverse",                            \
790    "Brazero", "Braminzero", "Branumber", "Bra"    "Once", "Bra", "CBra", "Cond", "SBra", "SCBra", "SCond",        \
791      "Cond ref", "Cond rec", "Cond def", "Brazero", "Braminzero",    \
792      "*PRUNE", "*SKIP", "*THEN", "*COMMIT", "*FAIL", "*ACCEPT"
793    
794    
795  /* This macro defines the length of fixed length operations in the compiled  /* This macro defines the length of fixed length operations in the compiled
# Line 634  in UTF-8 mode. The code that uses this t Line 803  in UTF-8 mode. The code that uses this t
803    
804  #define OP_LENGTHS \  #define OP_LENGTHS \
805    1,                             /* End                                    */ \    1,                             /* End                                    */ \
806    1, 1, 1, 1, 1, 1, 1, 1, 1, 1,  /* \A, \G, \B, \B, \D, \d, \S, \s, \W, \w */ \    1, 1, 1, 1, 1,                 /* \A, \G, \K, \B, \b                     */ \
807      1, 1, 1, 1, 1, 1,              /* \D, \d, \S, \s, \W, \w                 */ \
808    1, 1,                          /* Any, Anybyte                           */ \    1, 1,                          /* Any, Anybyte                           */ \
809    2, 2, 1,                       /* NOTPROP, PROP, EXTUNI                  */ \    3, 3, 1,                       /* NOTPROP, PROP, EXTUNI                  */ \
810      1, 1, 1, 1, 1,                 /* \R, \H, \h, \V, \v                     */ \
811    1, 1, 2, 1, 1,                 /* \Z, \z, Opt, ^, $                      */ \    1, 1, 2, 1, 1,                 /* \Z, \z, Opt, ^, $                      */ \
812    2,                             /* Char  - the minimum length             */ \    2,                             /* Char  - the minimum length             */ \
813    2,                             /* Charnc  - the minimum length           */ \    2,                             /* Charnc  - the minimum length           */ \
# Line 644  in UTF-8 mode. The code that uses this t Line 815  in UTF-8 mode. The code that uses this t
815    /* Positive single-char repeats                            ** These are  */ \    /* Positive single-char repeats                            ** These are  */ \
816    2, 2, 2, 2, 2, 2,              /* *, *?, +, +?, ?, ??      ** minima in  */ \    2, 2, 2, 2, 2, 2,              /* *, *?, +, +?, ?, ??      ** minima in  */ \
817    4, 4, 4,                       /* upto, minupto, exact     ** UTF-8 mode */ \    4, 4, 4,                       /* upto, minupto, exact     ** UTF-8 mode */ \
818      2, 2, 2, 4,                    /* *+, ++, ?+, upto+                      */ \
819    /* Negative single-char repeats - only for chars < 256                   */ \    /* Negative single-char repeats - only for chars < 256                   */ \
820    2, 2, 2, 2, 2, 2,              /* NOT *, *?, +, +?, ?, ??                */ \    2, 2, 2, 2, 2, 2,              /* NOT *, *?, +, +?, ?, ??                */ \
821    4, 4, 4,                       /* NOT upto, minupto, exact               */ \    4, 4, 4,                       /* NOT upto, minupto, exact               */ \
822      2, 2, 2, 4,                    /* Possessive *, +, ?, upto               */ \
823    /* Positive type repeats                                                 */ \    /* Positive type repeats                                                 */ \
824    2, 2, 2, 2, 2, 2,              /* Type *, *?, +, +?, ?, ??               */ \    2, 2, 2, 2, 2, 2,              /* Type *, *?, +, +?, ?, ??               */ \
825    4, 4, 4,                       /* Type upto, minupto, exact              */ \    4, 4, 4,                       /* Type upto, minupto, exact              */ \
826      2, 2, 2, 4,                    /* Possessive *+, ++, ?+, upto+           */ \
827    /* Character class & ref repeats                                         */ \    /* Character class & ref repeats                                         */ \
828    1, 1, 1, 1, 1, 1,              /* *, *?, +, +?, ?, ??                    */ \    1, 1, 1, 1, 1, 1,              /* *, *?, +, +?, ?, ??                    */ \
829    5, 5,                          /* CRRANGE, CRMINRANGE                    */ \    5, 5,                          /* CRRANGE, CRMINRANGE                    */ \
# Line 668  in UTF-8 mode. The code that uses this t Line 842  in UTF-8 mode. The code that uses this t
842    1+LINK_SIZE,                   /* Assert behind                          */ \    1+LINK_SIZE,                   /* Assert behind                          */ \
843    1+LINK_SIZE,                   /* Assert behind not                      */ \    1+LINK_SIZE,                   /* Assert behind not                      */ \
844    1+LINK_SIZE,                   /* Reverse                                */ \    1+LINK_SIZE,                   /* Reverse                                */ \
845    1+LINK_SIZE,                   /* Once                                   */ \    1+LINK_SIZE,                   /* ONCE                                   */ \
846      1+LINK_SIZE,                   /* BRA                                    */ \
847      3+LINK_SIZE,                   /* CBRA                                   */ \
848    1+LINK_SIZE,                   /* COND                                   */ \    1+LINK_SIZE,                   /* COND                                   */ \
849      1+LINK_SIZE,                   /* SBRA                                   */ \
850      3+LINK_SIZE,                   /* SCBRA                                  */ \
851      1+LINK_SIZE,                   /* SCOND                                  */ \
852    3,                             /* CREF                                   */ \    3,                             /* CREF                                   */ \
853      3,                             /* RREF                                   */ \
854      1,                             /* DEF                                    */ \
855    1, 1,                          /* BRAZERO, BRAMINZERO                    */ \    1, 1,                          /* BRAZERO, BRAMINZERO                    */ \
856    3,                             /* BRANUMBER                              */ \    1, 1, 1, 1,                    /* PRUNE, SKIP, THEN, COMMIT,             */ \
857    1+LINK_SIZE                    /* BRA                                    */ \    1, 1                           /* FAIL, ACCEPT                           */
858    
859    
860  /* A magic value for OP_CREF to indicate the "in recursion" condition. */  /* A magic value for OP_RREF to indicate the "any recursion" condition. */
861    
862  #define CREF_RECURSE  0xffff  #define RREF_ANY  0xffff
863    
864  /* Error code numbers. They are given names so that they can more easily be  /* Error code numbers. They are given names so that they can more easily be
865  tracked. */  tracked. */
# Line 687  enum { ERR0,  ERR1,  ERR2,  ERR3,  ERR4, Line 868  enum { ERR0,  ERR1,  ERR2,  ERR3,  ERR4,
868         ERR10, ERR11, ERR12, ERR13, ERR14, ERR15, ERR16, ERR17, ERR18, ERR19,         ERR10, ERR11, ERR12, ERR13, ERR14, ERR15, ERR16, ERR17, ERR18, ERR19,
869         ERR20, ERR21, ERR22, ERR23, ERR24, ERR25, ERR26, ERR27, ERR28, ERR29,         ERR20, ERR21, ERR22, ERR23, ERR24, ERR25, ERR26, ERR27, ERR28, ERR29,
870         ERR30, ERR31, ERR32, ERR33, ERR34, ERR35, ERR36, ERR37, ERR38, ERR39,         ERR30, ERR31, ERR32, ERR33, ERR34, ERR35, ERR36, ERR37, ERR38, ERR39,
871         ERR40, ERR41, ERR42, ERR43, ERR44, ERR45, ERR46, ERR47 };         ERR40, ERR41, ERR42, ERR43, ERR44, ERR45, ERR46, ERR47, ERR48, ERR49,
872           ERR50, ERR51, ERR52, ERR53, ERR54, ERR55, ERR56, ERR57, ERR58, ERR59,
873           ERR60, ERR61 };
874    
875  /* The real format of the start of the pcre block; the index of names and the  /* 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  code vector run on as long as necessary after the end. We store an explicit
# Line 709  NOTE NOTE NOTE: Line 892  NOTE NOTE NOTE:
892  typedef struct real_pcre {  typedef struct real_pcre {
893    pcre_uint32 magic_number;    pcre_uint32 magic_number;
894    pcre_uint32 size;               /* Total that was malloced */    pcre_uint32 size;               /* Total that was malloced */
895    pcre_uint32 options;    pcre_uint32 options;            /* Public options */
896    pcre_uint32 dummy1;             /* For future use, maybe */    pcre_uint16 flags;              /* Private flags */
897      pcre_uint16 dummy1;             /* For future use */
898    pcre_uint16 top_bracket;    pcre_uint16 top_bracket;
899    pcre_uint16 top_backref;    pcre_uint16 top_backref;
900    pcre_uint16 first_byte;    pcre_uint16 first_byte;
# Line 742  typedef struct compile_data { Line 925  typedef struct compile_data {
925    const uschar *fcc;            /* Points to case-flipping table */    const uschar *fcc;            /* Points to case-flipping table */
926    const uschar *cbits;          /* Points to character type table */    const uschar *cbits;          /* Points to character type table */
927    const uschar *ctypes;         /* Points to table of type maps */    const uschar *ctypes;         /* Points to table of type maps */
928      const uschar *start_workspace;/* The start of working space */
929    const uschar *start_code;     /* The start of the compiled code */    const uschar *start_code;     /* The start of the compiled code */
930    const uschar *start_pattern;  /* The start of the pattern */    const uschar *start_pattern;  /* The start of the pattern */
931      const uschar *end_pattern;    /* The end of the pattern */
932      uschar *hwm;                  /* High watermark of workspace */
933    uschar *name_table;           /* The name/number table */    uschar *name_table;           /* The name/number table */
934    int  names_found;             /* Number of entries so far */    int  names_found;             /* Number of entries so far */
935    int  name_entry_size;         /* Size of each entry */    int  name_entry_size;         /* Size of each entry */
936      int  bracount;                /* Count of capturing parens */
937    int  top_backref;             /* Maximum back reference */    int  top_backref;             /* Maximum back reference */
938    unsigned int backref_map;     /* Bitmap of low back refs */    unsigned int backref_map;     /* Bitmap of low back refs */
939      int  external_options;        /* External (initial) options */
940      int  external_flags;          /* External flag bits to be set */
941    int  req_varyopt;             /* "After variable item" flag for reqbyte */    int  req_varyopt;             /* "After variable item" flag for reqbyte */
942    BOOL nopartial;               /* Set TRUE if partial won't work */    BOOL had_accept;              /* (*ACCEPT) encountered */
943      int  nltype;                  /* Newline type */
944      int  nllen;                   /* Newline string length */
945      uschar nl[4];                 /* Newline string when fixed length */
946  } compile_data;  } compile_data;
947    
948  /* Structure for maintaining a chain of pointers to the currently incomplete  /* Structure for maintaining a chain of pointers to the currently incomplete
# Line 768  typedef struct recursion_info { Line 960  typedef struct recursion_info {
960    struct recursion_info *prevrec; /* Previous recursion record (or NULL) */    struct recursion_info *prevrec; /* Previous recursion record (or NULL) */
961    int group_num;                /* Number of group that was called */    int group_num;                /* Number of group that was called */
962    const uschar *after_call;     /* "Return value": points after the call in the expr */    const uschar *after_call;     /* "Return value": points after the call in the expr */
963    const uschar *save_start;     /* Old value of md->start_match */    USPTR save_start;             /* Old value of mstart */
964    int *offset_save;             /* Pointer to start of saved offsets */    int *offset_save;             /* Pointer to start of saved offsets */
965    int saved_max;                /* Number of saved offsets */    int saved_max;                /* Number of saved offsets */
966  } recursion_info;  } recursion_info;
967    
968  /* When compiling in a mode that doesn't use recursive calls to match(),  /* Structure for building a chain of data for holding the values of the subject
969  a structure is used to remember local variables on the heap. It is defined in  pointer at the start of each subpattern, so as to detect when an empty string
970  pcre.c, close to the match() function, so that it is easy to keep it in step  has been matched by a subpattern - to break infinite loops. */
971  with any changes of local variable. However, the pointer to the current frame  
972  must be saved in some "static" place over a longjmp(). We declare the  typedef struct eptrblock {
973  structure here so that we can put a pointer in the match_data structure.    struct eptrblock *epb_prev;
974  NOTE: This isn't used for a "normal" compilation of pcre. */    USPTR epb_saved_eptr;
975    } eptrblock;
976    
 struct heapframe;  
977    
978  /* Structure for passing "static" information around between the functions  /* Structure for passing "static" information around between the functions
979  doing traditional NFA matching, so that they are thread-safe. */  doing traditional NFA matching, so that they are thread-safe. */
980    
981  typedef struct match_data {  typedef struct match_data {
982    unsigned long int match_call_count; /* As it says */    unsigned long int match_call_count;      /* As it says */
983    unsigned long int match_limit;/* As it says */    unsigned long int match_limit;           /* As it says */
984      unsigned long int match_limit_recursion; /* As it says */
985    int   *offset_vector;         /* Offset vector */    int   *offset_vector;         /* Offset vector */
986    int    offset_end;            /* One past the end */    int    offset_end;            /* One past the end */
987    int    offset_max;            /* The maximum usable for return data */    int    offset_max;            /* The maximum usable for return data */
988      int    nltype;                /* Newline type */
989      int    nllen;                 /* Newline string length */
990      uschar nl[4];                 /* Newline string when fixed */
991    const uschar *lcc;            /* Points to lower casing table */    const uschar *lcc;            /* Points to lower casing table */
992    const uschar *ctypes;         /* Points to table of type maps */    const uschar *ctypes;         /* Points to table of type maps */
993    BOOL   offset_overflow;       /* Set if too many extractions */    BOOL   offset_overflow;       /* Set if too many extractions */
# Line 803  typedef struct match_data { Line 999  typedef struct match_data {
999    BOOL   partial;               /* PARTIAL flag */    BOOL   partial;               /* PARTIAL flag */
1000    BOOL   hitend;                /* Hit the end of the subject at some point */    BOOL   hitend;                /* Hit the end of the subject at some point */
1001    const uschar *start_code;     /* For use when recursing */    const uschar *start_code;     /* For use when recursing */
1002    const uschar *start_subject;  /* Start of the subject string */    USPTR  start_subject;         /* Start of the subject string */
1003    const uschar *end_subject;    /* End of the subject string */    USPTR  end_subject;           /* End of the subject string */
1004    const uschar *start_match;    /* Start of this match attempt */    USPTR  start_match_ptr;       /* Start of matched string */
1005    const uschar *end_match_ptr;  /* Subject position at end match */    USPTR  end_match_ptr;         /* Subject position at end match */
1006    int    end_offset_top;        /* Highwater mark at end of match */    int    end_offset_top;        /* Highwater mark at end of match */
1007    int    capture_last;          /* Most recent capture number */    int    capture_last;          /* Most recent capture number */
1008    int    start_offset;          /* The start offset value */    int    start_offset;          /* The start offset value */
1009      eptrblock *eptrchain;         /* Chain of eptrblocks for tail recursions */
1010      int    eptrn;                 /* Next free eptrblock */
1011    recursion_info *recursive;    /* Linked list of recursion data */    recursion_info *recursive;    /* Linked list of recursion data */
1012    void  *callout_data;          /* To pass back to callouts */    void  *callout_data;          /* To pass back to callouts */
   struct heapframe *thisframe;  /* Used only when compiling for no recursion */  
1013  } match_data;  } match_data;
1014    
1015  /* A similar structure is used for the same purpose by the DFA matching  /* A similar structure is used for the same purpose by the DFA matching
# Line 825  typedef struct dfa_match_data { Line 1022  typedef struct dfa_match_data {
1022    const uschar *tables;         /* Character tables */    const uschar *tables;         /* Character tables */
1023    int   moptions;               /* Match options */    int   moptions;               /* Match options */
1024    int   poptions;               /* Pattern options */    int   poptions;               /* Pattern options */
1025      int    nltype;                /* Newline type */
1026      int    nllen;                 /* Newline string length */
1027      uschar nl[4];                 /* Newline string when fixed */
1028    void  *callout_data;          /* To pass back to callouts */    void  *callout_data;          /* To pass back to callouts */
1029  } dfa_match_data;  } dfa_match_data;
1030    
# Line 861  total length. */ Line 1061  total length. */
1061  #define ctypes_offset (cbits_offset + cbit_length)  #define ctypes_offset (cbits_offset + cbit_length)
1062  #define tables_length (ctypes_offset + 256)  #define tables_length (ctypes_offset + 256)
1063    
1064  /* Layout of the UCP type table that translates property names into codes for  /* Layout of the UCP type table that translates property names into types and
1065  ucp_findchar(). */  codes. */
1066    
1067  typedef struct {  typedef struct {
1068    const char *name;    const char *name;
1069    int value;    pcre_uint16 type;
1070      pcre_uint16 value;
1071  } ucp_type_table;  } ucp_type_table;
1072    
1073    
# Line 894  extern const uschar _pcre_OP_lengths[]; Line 1095  extern const uschar _pcre_OP_lengths[];
1095  one of the exported public functions. They have to be "external" in the C  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. */  sense, but are not part of the PCRE public API. */
1097    
1098  extern int         _pcre_ord2utf8(int, uschar *);  extern BOOL         _pcre_is_newline(const uschar *, int, const uschar *,
1099  extern void        _pcre_printint(pcre *, FILE *);                        int *, BOOL);
1100  extern real_pcre * _pcre_try_flipped(const real_pcre *, real_pcre *,  extern int          _pcre_ord2utf8(int, uschar *);
1101                       const pcre_study_data *, pcre_study_data *);  extern real_pcre   *_pcre_try_flipped(const real_pcre *, real_pcre *,
1102  extern int         _pcre_ucp_findchar(const int, int *, int *);                        const pcre_study_data *, pcre_study_data *);
1103  extern int         _pcre_valid_utf8(const uschar *, int);  extern int          _pcre_ucp_findprop(const unsigned int, int *, int *);
1104  extern BOOL        _pcre_xclass(int, const uschar *);  extern unsigned int _pcre_ucp_othercase(const unsigned int);
1105    extern int          _pcre_valid_utf8(const uschar *, int);
1106    extern BOOL         _pcre_was_newline(const uschar *, int, const uschar *,
1107                          int *, BOOL);
1108    extern BOOL         _pcre_xclass(int, const uschar *);
1109    
1110    #endif
1111    
1112  /* End of pcre_internal.h */  /* End of pcre_internal.h */

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