Installed PCRE release 7.0.

[exim.git] / src / src / pcre / pcre.h

/* $Cambridge: exim/src/src/pcre/pcre.h,v 1.5 2007/01/23 15:08:45 ph10 Exp $ */

/*************************************************
*       Perl-Compatible Regular Expressions      *
*************************************************/

/* This is the public header file for the PCRE library, to be #included by
applications that call the PCRE functions.

           Copyright (c) 1997-2006 University of Cambridge

-----------------------------------------------------------------------------
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice,
      this list of conditions and the following disclaimer.

    * Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.

    * Neither the name of the University of Cambridge nor the names of its
      contributors may be used to endorse or promote products derived from
      this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
-----------------------------------------------------------------------------
*/

#ifndef _PCRE_H
#define _PCRE_H

/* The current PCRE version information. */

/* NOTES FOR FUTURE MAINTAINERS: Do not use numbers with leading zeros, because
they may be treated as octal constants. The PCRE_PRERELEASE feature is for
identifying release candidates. It might be defined as -RC2, for example. In
real releases, it should be defined empty. Do not change the alignment of these
statments. The code in ./configure greps out the version numbers by using "cut"
to get values from column 29 onwards. These are substituted into pcre-config
and libpcre.pc. The values are not put into configure.ac and substituted here
(which would simplify this issue) because that makes life harder for those who
cannot run ./configure. As it now stands, this file need not be edited in that
circumstance. */

#define PCRE_MAJOR          7
#define PCRE_MINOR          0
#define PCRE_PRERELEASE
#define PCRE_DATE           18-Dec-2006

/* Win32 uses DLL by default; it needs special stuff for exported functions
when building PCRE. */

#ifdef _WIN32
#  ifdef PCRE_DEFINITION
#    ifdef DLL_EXPORT
#      define PCRE_DATA_SCOPE __declspec(dllexport)
#    endif
#  else
#    ifndef PCRE_STATIC
#      define PCRE_DATA_SCOPE extern __declspec(dllimport)
#    endif
#  endif
#endif

/* Otherwise, we use the standard "extern". */

#ifndef PCRE_DATA_SCOPE
#  ifdef __cplusplus
#    define PCRE_DATA_SCOPE     extern "C"
#  else
#    define PCRE_DATA_SCOPE     extern
#  endif
#endif

/* Have to include stdlib.h in order to ensure that size_t is defined;
it is needed here for malloc. */

#include <stdlib.h>

/* Allow for C++ users */

#ifdef __cplusplus
extern "C" {
#endif

/* Options */

#define PCRE_CASELESS           0x00000001
#define PCRE_MULTILINE          0x00000002
#define PCRE_DOTALL             0x00000004
#define PCRE_EXTENDED           0x00000008
#define PCRE_ANCHORED           0x00000010
#define PCRE_DOLLAR_ENDONLY     0x00000020
#define PCRE_EXTRA              0x00000040
#define PCRE_NOTBOL             0x00000080
#define PCRE_NOTEOL             0x00000100
#define PCRE_UNGREEDY           0x00000200
#define PCRE_NOTEMPTY           0x00000400
#define PCRE_UTF8               0x00000800
#define PCRE_NO_AUTO_CAPTURE    0x00001000
#define PCRE_NO_UTF8_CHECK      0x00002000
#define PCRE_AUTO_CALLOUT       0x00004000
#define PCRE_PARTIAL            0x00008000
#define PCRE_DFA_SHORTEST       0x00010000
#define PCRE_DFA_RESTART        0x00020000
#define PCRE_FIRSTLINE          0x00040000
#define PCRE_DUPNAMES           0x00080000
#define PCRE_NEWLINE_CR         0x00100000
#define PCRE_NEWLINE_LF         0x00200000
#define PCRE_NEWLINE_CRLF       0x00300000
#define PCRE_NEWLINE_ANY        0x00400000

/* Exec-time and get/set-time error codes */

#define PCRE_ERROR_NOMATCH         (-1)
#define PCRE_ERROR_NULL            (-2)
#define PCRE_ERROR_BADOPTION       (-3)
#define PCRE_ERROR_BADMAGIC        (-4)
#define PCRE_ERROR_UNKNOWN_OPCODE  (-5)
#define PCRE_ERROR_UNKNOWN_NODE    (-5)  /* For backward compatibility */
#define PCRE_ERROR_NOMEMORY        (-6)
#define PCRE_ERROR_NOSUBSTRING     (-7)
#define PCRE_ERROR_MATCHLIMIT      (-8)
#define PCRE_ERROR_CALLOUT         (-9)  /* Never used by PCRE itself */
#define PCRE_ERROR_BADUTF8        (-10)
#define PCRE_ERROR_BADUTF8_OFFSET (-11)
#define PCRE_ERROR_PARTIAL        (-12)
#define PCRE_ERROR_BADPARTIAL     (-13)
#define PCRE_ERROR_INTERNAL       (-14)
#define PCRE_ERROR_BADCOUNT       (-15)
#define PCRE_ERROR_DFA_UITEM      (-16)
#define PCRE_ERROR_DFA_UCOND      (-17)
#define PCRE_ERROR_DFA_UMLIMIT    (-18)
#define PCRE_ERROR_DFA_WSSIZE     (-19)
#define PCRE_ERROR_DFA_RECURSE    (-20)
#define PCRE_ERROR_RECURSIONLIMIT (-21)
#define PCRE_ERROR_NULLWSLIMIT    (-22)
#define PCRE_ERROR_BADNEWLINE     (-23)

/* Request types for pcre_fullinfo() */

#define PCRE_INFO_OPTIONS            0
#define PCRE_INFO_SIZE               1
#define PCRE_INFO_CAPTURECOUNT       2
#define PCRE_INFO_BACKREFMAX         3
#define PCRE_INFO_FIRSTBYTE          4
#define PCRE_INFO_FIRSTCHAR          4  /* For backwards compatibility */
#define PCRE_INFO_FIRSTTABLE         5
#define PCRE_INFO_LASTLITERAL        6
#define PCRE_INFO_NAMEENTRYSIZE      7
#define PCRE_INFO_NAMECOUNT          8
#define PCRE_INFO_NAMETABLE          9
#define PCRE_INFO_STUDYSIZE         10
#define PCRE_INFO_DEFAULT_TABLES    11

/* Request types for pcre_config(). Do not re-arrange, in order to remain
compatible. */

#define PCRE_CONFIG_UTF8                    0
#define PCRE_CONFIG_NEWLINE                 1
#define PCRE_CONFIG_LINK_SIZE               2
#define PCRE_CONFIG_POSIX_MALLOC_THRESHOLD  3
#define PCRE_CONFIG_MATCH_LIMIT             4
#define PCRE_CONFIG_STACKRECURSE            5
#define PCRE_CONFIG_UNICODE_PROPERTIES      6
#define PCRE_CONFIG_MATCH_LIMIT_RECURSION   7

/* Bit flags for the pcre_extra structure. Do not re-arrange or redefine
these bits, just add new ones on the end, in order to remain compatible. */

#define PCRE_EXTRA_STUDY_DATA             0x0001
#define PCRE_EXTRA_MATCH_LIMIT            0x0002
#define PCRE_EXTRA_CALLOUT_DATA           0x0004
#define PCRE_EXTRA_TABLES                 0x0008
#define PCRE_EXTRA_MATCH_LIMIT_RECURSION  0x0010

/* Types */

struct real_pcre;                 /* declaration; the definition is private  */
typedef struct real_pcre pcre;

/* When PCRE is compiled as a C++ library, the subject pointer type can be
replaced with a custom type. For conventional use, the public interface is a
const char *. */

#ifndef PCRE_SPTR
#define PCRE_SPTR const char *
#endif

/* The structure for passing additional data to pcre_exec(). This is defined in
such as way as to be extensible. Always add new fields at the end, in order to
remain compatible. */

typedef struct pcre_extra {
  unsigned long int flags;        /* Bits for which fields are set */
  void *study_data;               /* Opaque data from pcre_study() */
  unsigned long int match_limit;  /* Maximum number of calls to match() */
  void *callout_data;             /* Data passed back in callouts */
  const unsigned char *tables;    /* Pointer to character tables */
  unsigned long int match_limit_recursion; /* Max recursive calls to match() */
} pcre_extra;

/* The structure for passing out data via the pcre_callout_function. We use a
structure so that new fields can be added on the end in future versions,
without changing the API of the function, thereby allowing old clients to work
without modification. */

typedef struct pcre_callout_block {
  int          version;           /* Identifies version of block */
  /* ------------------------ Version 0 ------------------------------- */
  int          callout_number;    /* Number compiled into pattern */
  int         *offset_vector;     /* The offset vector */
  PCRE_SPTR    subject;           /* The subject being matched */
  int          subject_length;    /* The length of the subject */
  int          start_match;       /* Offset to start of this match attempt */
  int          current_position;  /* Where we currently are in the subject */
  int          capture_top;       /* Max current capture */
  int          capture_last;      /* Most recently closed capture */
  void        *callout_data;      /* Data passed in with the call */
  /* ------------------- Added for Version 1 -------------------------- */
  int          pattern_position;  /* Offset to next item in the pattern */
  int          next_item_length;  /* Length of next item in the pattern */
  /* ------------------------------------------------------------------ */
} pcre_callout_block;

/* Indirection for store get and free functions. These can be set to
alternative malloc/free functions if required. Special ones are used in the
non-recursive case for "frames". There is also an optional callout function
that is triggered by the (?) regex item. For Virtual Pascal, these definitions
have to take another form. */

#ifndef VPCOMPAT
PCRE_DATA_SCOPE void *(*pcre_malloc)(size_t);
PCRE_DATA_SCOPE void  (*pcre_free)(void *);
PCRE_DATA_SCOPE void *(*pcre_stack_malloc)(size_t);
PCRE_DATA_SCOPE void  (*pcre_stack_free)(void *);
PCRE_DATA_SCOPE int   (*pcre_callout)(pcre_callout_block *);
#else   /* VPCOMPAT */
PCRE_DATA_SCOPE void *pcre_malloc(size_t);
PCRE_DATA_SCOPE void  pcre_free(void *);
PCRE_DATA_SCOPE void *pcre_stack_malloc(size_t);
PCRE_DATA_SCOPE void  pcre_stack_free(void *);
PCRE_DATA_SCOPE int   pcre_callout(pcre_callout_block *);
#endif  /* VPCOMPAT */

/* Exported PCRE functions */

PCRE_DATA_SCOPE pcre *pcre_compile(const char *, int, const char **, int *,
                  const unsigned char *);
PCRE_DATA_SCOPE pcre *pcre_compile2(const char *, int, int *, const char **,
                  int *, const unsigned char *);
PCRE_DATA_SCOPE int  pcre_config(int, void *);
PCRE_DATA_SCOPE int  pcre_copy_named_substring(const pcre *, const char *,
                  int *, int, const char *, char *, int);
PCRE_DATA_SCOPE int  pcre_copy_substring(const char *, int *, int, int, char *,
                  int);
PCRE_DATA_SCOPE int  pcre_dfa_exec(const pcre *, const pcre_extra *,
                  const char *, int, int, int, int *, int , int *, int);
PCRE_DATA_SCOPE int  pcre_exec(const pcre *, const pcre_extra *, PCRE_SPTR,
                   int, int, int, int *, int);
PCRE_DATA_SCOPE void pcre_free_substring(const char *);
PCRE_DATA_SCOPE void pcre_free_substring_list(const char **);
PCRE_DATA_SCOPE int  pcre_fullinfo(const pcre *, const pcre_extra *, int,
                  void *);
PCRE_DATA_SCOPE int  pcre_get_named_substring(const pcre *, const char *,
                  int *, int, const char *, const char **);
PCRE_DATA_SCOPE int  pcre_get_stringnumber(const pcre *, const char *);
PCRE_DATA_SCOPE int  pcre_get_stringtable_entries(const pcre *, const char *,
                  char **, char **);
PCRE_DATA_SCOPE int  pcre_get_substring(const char *, int *, int, int,
                  const char **);
PCRE_DATA_SCOPE int  pcre_get_substring_list(const char *, int *, int,
                  const char ***);
PCRE_DATA_SCOPE int  pcre_info(const pcre *, int *, int *);
PCRE_DATA_SCOPE const unsigned char *pcre_maketables(void);
PCRE_DATA_SCOPE int  pcre_refcount(pcre *, int);
PCRE_DATA_SCOPE pcre_extra *pcre_study(const pcre *, int, const char **);
PCRE_DATA_SCOPE const char *pcre_version(void);

#ifdef __cplusplus
}  /* extern "C" */
#endif

#endif /* End of pcre.h */