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tor-android/external/privoxy/pcrs.h

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adding in privoxy directly to Orbot repo
2012-05-03 18:32:18 +00:00
#ifndef PCRS_H_INCLUDED
#define PCRS_H_INCLUDED
/*********************************************************************
*
* File : $Source: /cvsroot/ijbswa/current/pcrs.h,v $
*
* Purpose : Header file for pcrs.c
*
* Copyright : see pcrs.c
*
* Revisions :
* $Log: pcrs.h,v $
* Revision 1.16 2007/04/30 15:02:19 fabiankeil
* Introduce dynamic pcrs jobs that can resolve variables.
*
* Revision 1.15 2007/01/05 15:46:12 fabiankeil
* Don't use strlen() to calculate the length of
* the pcrs substitutes. They don't have to be valid C
* strings and getting their length wrong can result in
* user-controlled memory corruption.
*
* Thanks to Felix Gr<EFBFBD>bert for reporting the problem
* and providing the fix [#1627140].
*
* Revision 1.14 2006/12/24 17:27:37 fabiankeil
* Increase pcrs error code offset to prevent overlaps
* with pcre versions newer than our own.
*
* Revision 1.13 2006/07/18 14:48:47 david__schmidt
* Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
* with what was really the latest development (the v_3_0_branch branch)
*
* Revision 1.11 2002/03/08 14:18:23 oes
* Fixing -Wconversion warnings
*
* Revision 1.10 2002/03/08 13:44:48 oes
* Hiding internal functions, preventing double inclusion of pcre.h
*
* Revision 1.9 2001/08/18 11:35:29 oes
* - Introduced pcrs_strerror()
* - added pcrs_execute_list()
*
* Revision 1.8 2001/08/15 15:32:50 oes
* Replaced the hard limit for the maximum number of matches
* by dynamic reallocation
*
* Revision 1.7 2001/08/05 13:13:11 jongfoster
* Making parameters "const" where possible.
*
* Revision 1.6 2001/07/29 18:52:06 jongfoster
* Renaming _PCRS_H, and adding "extern C {}"
*
* Revision 1.5 2001/07/18 17:27:00 oes
* Changed interface; Cosmetics
*
* Revision 1.4 2001/06/29 13:33:19 oes
* - Cleaned up, commented and adapted to reflect the
* changes in pcrs.c
* - Introduced the PCRS_* flags
*
* Revision 1.3 2001/06/09 10:58:57 jongfoster
* Removing a single unused #define which referenced BUFSIZ
*
* Revision 1.2 2001/05/25 11:03:55 oes
* Added sanity check for NULL jobs to pcrs_exec_substitution
*
* Revision 1.1.1.1 2001/05/15 13:59:02 oes
* Initial import of version 2.9.3 source tree
*
* Revision 1.4 2001/05/11 01:57:02 rodney
* Added new file header standard w/RCS control tags.
*
* revision 1.3 2001/05/08 02:38:13 rodney
* Changed C++ "//" style comment to C style comments.
*
* revision 1.2 2001/04/30 02:39:24 rodney
* Made this pcrs.h file conditionally included.
*
* revision 1.1 2001/04/16 21:10:38 rodney
* Initial checkin
*
*********************************************************************/
#define PCRS_H_VERSION "$Id: pcrs.h,v 1.16 2007/04/30 15:02:19 fabiankeil Exp $"
#ifndef _PCRE_H
#include <pcre.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
/*
* Constants:
*/
#define FALSE 0
#define TRUE 1
/* Capacity */
#define PCRS_MAX_SUBMATCHES 33 /* Maximum number of capturing subpatterns allowed. MUST be <= 99! FIXME: Should be dynamic */
#define PCRS_MAX_MATCH_INIT 40 /* Initial amount of matches that can be stored in global searches */
#define PCRS_MAX_MATCH_GROW 1.6 /* Factor by which storage for matches is extended if exhausted */
/*
* PCRS error codes
*
* They are supposed to be handled together with PCRE error
* codes and have to start with an offset to prevent overlaps.
*
* PCRE 6.7 uses error codes from -1 to -21, PCRS error codes
* below -100 should be safe for a while.
*/
#define PCRS_ERR_NOMEM -100 /* Failed to acquire memory. */
#define PCRS_ERR_CMDSYNTAX -101 /* Syntax of s///-command */
#define PCRS_ERR_STUDY -102 /* pcre error while studying the pattern */
#define PCRS_ERR_BADJOB -103 /* NULL job pointer, pattern or substitute */
#define PCRS_WARN_BADREF -104 /* Backreference out of range */
#define PCRS_WARN_TRUNCATION -105 /* At least one pcrs variable was too big,
* only the first part was used. */
/* Flags */
#define PCRS_GLOBAL 1 /* Job should be applied globally, as with perl's g option */
#define PCRS_TRIVIAL 2 /* Backreferences in the substitute are ignored */
#define PCRS_SUCCESS 4 /* Job did previously match */
/*
* Data types:
*/
/* A compiled substitute */
typedef struct {
char *text; /* The plaintext part of the substitute, with all backreferences stripped */
size_t length; /* The substitute may not be a valid C string so we can't rely on strlen(). */
int backrefs; /* The number of backreferences */
int block_offset[PCRS_MAX_SUBMATCHES]; /* Array with the offsets of all plaintext blocks in text */
size_t block_length[PCRS_MAX_SUBMATCHES]; /* Array with the lengths of all plaintext blocks in text */
int backref[PCRS_MAX_SUBMATCHES]; /* Array with the backref number for all plaintext block borders */
int backref_count[PCRS_MAX_SUBMATCHES + 2]; /* Array with the number of references to each backref index */
} pcrs_substitute;
/*
* A match, including all captured subpatterns (submatches)
* Note: The zeroth is the whole match, the PCRS_MAX_SUBMATCHES + 0th
* is the range before the match, the PCRS_MAX_SUBMATCHES + 1th is the
* range after the match.
*/
typedef struct {
int submatches; /* Number of captured subpatterns */
int submatch_offset[PCRS_MAX_SUBMATCHES + 2]; /* Offset for each submatch in the subject */
size_t submatch_length[PCRS_MAX_SUBMATCHES + 2]; /* Length of each submatch in the subject */
} pcrs_match;
/* A PCRS job */
typedef struct PCRS_JOB {
pcre *pattern; /* The compiled pcre pattern */
pcre_extra *hints; /* The pcre hints for the pattern */
int options; /* The pcre options (numeric) */
int flags; /* The pcrs and user flags (see "Flags" above) */
pcrs_substitute *substitute; /* The compiled pcrs substitute */
struct PCRS_JOB *next; /* Pointer for chaining jobs to joblists */
} pcrs_job;
/*
* Prototypes:
*/
/* Main usage */
extern pcrs_job *pcrs_compile_command(const char *command, int *errptr);
extern pcrs_job *pcrs_compile(const char *pattern, const char *substitute, const char *options, int *errptr);
extern int pcrs_execute(pcrs_job *job, const char *subject, size_t subject_length, char **result, size_t *result_length);
extern int pcrs_execute_list(pcrs_job *joblist, char *subject, size_t subject_length, char **result, size_t *result_length);
/* Freeing jobs */
extern pcrs_job *pcrs_free_job(pcrs_job *job);
extern void pcrs_free_joblist(pcrs_job *joblist);
/* Info on errors: */
extern const char *pcrs_strerror(const int error);
extern int pcrs_job_is_dynamic(char *job);
extern char pcrs_get_delimiter(const char *string);
extern char *pcrs_execute_single_command(const char *subject, const char *pcrs_command, int *hits);
/*
* Variable/value pair for dynamic pcrs commands.
*/
struct pcrs_variable
{
const char *name;
char *value;
int static_value;
};
extern pcrs_job *pcrs_compile_dynamic_command(char *pcrs_command, const struct pcrs_variable v[], int *error);
/* Only relevant for maximum pcrs variable size */
#ifndef PCRS_BUFFER_SIZE
#define PCRS_BUFFER_SIZE 4000
#endif /* ndef PCRS_BUFFER_SIZE */
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* ndef PCRS_H_INCLUDED */
/*
Local Variables:
tab-width: 3
end:
*/