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/*
* Secret Labs' Regular Expression Engine
*
* regular expression matching engine
*
* Copyright (c) 1997-2001 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, and
large enough to hold a UCS4 character) */
#define SRE_CODE Py_UCS4
#if SIZEOF_SIZE_T > 4
# define SRE_MAXREPEAT (~(SRE_CODE)0)
# define SRE_MAXGROUPS ((~(SRE_CODE)0) / 2)
#else
# define SRE_MAXREPEAT ((SRE_CODE)PY_SSIZE_T_MAX)
# define SRE_MAXGROUPS ((SRE_CODE)PY_SSIZE_T_MAX / SIZEOF_SIZE_T / 2)
#endif
typedef struct {
PyObject_VAR_HEAD
Py_ssize_t groups; /* must be first! */
PyObject* groupindex;
PyObject* indexgroup;
/* compatibility */
PyObject* pattern; /* pattern source (or None) */
int flags; /* flags used when compiling pattern source */
PyObject *weakreflist; /* List of weak references */
int isbytes; /* pattern type (1 - bytes, 0 - string, -1 - None) */
/* pattern code */
Py_ssize_t codesize;
SRE_CODE code[1];
} PatternObject;
#define PatternObject_GetCode(o) (((PatternObject*)(o))->code)
typedef struct {
PyObject_VAR_HEAD
PyObject* string; /* link to the target string (must be first) */
PyObject* regs; /* cached list of matching spans */
PatternObject* pattern; /* link to the regex (pattern) object */
Py_ssize_t pos, endpos; /* current target slice */
Py_ssize_t lastindex; /* last index marker seen by the engine (-1 if none) */
Py_ssize_t groups; /* number of groups (start/end marks) */
Py_ssize_t mark[1];
} MatchObject;
typedef unsigned int (*SRE_TOLOWER_HOOK)(unsigned int ch);
typedef struct SRE_REPEAT_T {
Py_ssize_t count;
SRE_CODE* pattern; /* points to REPEAT operator arguments */
void* last_ptr; /* helper to check for infinite loops */
struct SRE_REPEAT_T *prev; /* points to previous repeat context */
} SRE_REPEAT;
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 */
/* attributes for the match object */
PyObject* string;
Py_ssize_t pos, endpos;
int isbytes;
int charsize; /* character size */
/* registers */
Py_ssize_t lastindex;
Py_ssize_t lastmark;
void** mark;
/* dynamically allocated stuff */
char* data_stack;
size_t data_stack_size;
size_t data_stack_base;
Py_buffer buffer;
/* current repeat context */
SRE_REPEAT *repeat;
/* hooks */
SRE_TOLOWER_HOOK lower, upper;
} SRE_STATE;
typedef struct {
PyObject_HEAD
PyObject* pattern;
SRE_STATE state;
} ScannerObject;
#endif