mirror of https://github.com/python/cpython.git
94 lines
2.5 KiB
C
94 lines
2.5 KiB
C
/*
|
|
* 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 Py_UNICODE character) */
|
|
#ifdef Py_UNICODE_WIDE
|
|
#define SRE_CODE unsigned long
|
|
#else
|
|
#define SRE_CODE unsigned short
|
|
#endif
|
|
|
|
#define SRE_CODE unsigned short
|
|
|
|
typedef struct {
|
|
PyObject_VAR_HEAD
|
|
int groups; /* must be first! */
|
|
PyObject* groupindex;
|
|
PyObject* indexgroup;
|
|
/* compatibility */
|
|
PyObject* pattern; /* pattern source (or None) */
|
|
int flags; /* flags used when compiling pattern source */
|
|
/* pattern code */
|
|
int 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 */
|
|
int pos, endpos; /* current target slice */
|
|
int lastindex; /* last index marker seen by the engine (-1 if none) */
|
|
int groups; /* number of groups (start/end marks) */
|
|
int mark[1];
|
|
} MatchObject;
|
|
|
|
typedef unsigned int (*SRE_TOLOWER_HOOK)(unsigned int ch);
|
|
|
|
/* FIXME: <fl> shouldn't be a constant, really... */
|
|
#define SRE_MARK_SIZE 200
|
|
|
|
typedef struct SRE_REPEAT_T {
|
|
int count;
|
|
SRE_CODE* pattern; /* points to REPEAT operator arguments */
|
|
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;
|
|
int pos, endpos;
|
|
/* character size */
|
|
int charsize;
|
|
/* registers */
|
|
int lastindex;
|
|
int lastmark;
|
|
void* mark[SRE_MARK_SIZE];
|
|
/* dynamically allocated stuff */
|
|
void** mark_stack;
|
|
int mark_stack_size;
|
|
int mark_stack_base;
|
|
SRE_REPEAT *repeat; /* current repeat context */
|
|
/* hooks */
|
|
SRE_TOLOWER_HOOK lower;
|
|
} SRE_STATE;
|
|
|
|
typedef struct {
|
|
PyObject_HEAD
|
|
PyObject* pattern;
|
|
SRE_STATE state;
|
|
} ScannerObject;
|
|
|
|
#endif
|