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/*
* Secret Labs' Regular Expression Engine
*
* regular expression matching engine
*
* Copyright (c) 1997-2000 by Secret Labs AB. All rights reserved.
*
* See the _sre.c file for information on usage and redistribution.
*/
#ifndef SRE_INCLUDED
#define SRE_INCLUDED
#include "sre_constants.h"
/* size of a code word (must be unsigned short or larger) */
#define SRE_CODE unsigned short
typedef struct {
PyObject_HEAD
PyObject* code; /* link to the code string object */
int groups;
PyObject* groupindex;
/* compatibility */
PyObject* pattern; /* pattern source (or None) */
int flags; /* flags used when compiling pattern source */
} PatternObject;
#define PatternObject_GetCode(o)\
((void*) PyString_AS_STRING(((PatternObject*)(o))->code))
typedef struct {
PyObject_HEAD
PyObject* string; /* link to the target string */
PatternObject* pattern; /* link to the regex (pattern) object */
int index; /* last index marker seen by the engine (-1 if none) */
int groups; /* number of groups (start/end marks) */
int mark[2];
} MatchObject;
typedef unsigned int (*SRE_TOLOWER_HOOK)(unsigned int ch);
typedef struct {
/* stack elements */
SRE_CODE* pattern;
void* ptr;
} SRE_STACK;
/* FIXME: <fl> shouldn't be a constant, really... */
#define SRE_MARK_SIZE 200
typedef struct {
/* string pointers */
void* ptr; /* current position (also end of current slice) */
void* beginning; /* start of original string */
void* start; /* start of current slice */
void* end; /* end of original string */
/* character size */
int charsize;
/* registers */
int index;
int lastmark;
void* mark[SRE_MARK_SIZE];
/* backtracking stack */
SRE_STACK* stack;
int stacksize;
int stackbase;
/* hooks */
SRE_TOLOWER_HOOK lower;
} SRE_STATE;
typedef struct {
/* scanner (internal helper object) */
PyObject_HEAD
PyObject* pattern;
PyObject* string;
SRE_STATE state;
} ScannerObject;
#endif
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