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6f01398236
the pattern must have a fixed width. - got rid of array-module dependencies; the match pro- gram is now stored inside the pattern object, rather than in an extra string buffer. - cleaned up a various of potential leaks, api abuses, and other minors in the engine module. - use mal's new isalnum macro, rather than my own work- around. - untabified test_sre.py. seems like I removed a couple of trailing spaces in the process...
82 lines
2 KiB
C
82 lines
2 KiB
C
/*
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* Secret Labs' Regular Expression Engine
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*
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* regular expression matching engine
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*
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* Copyright (c) 1997-2000 by Secret Labs AB. All rights reserved.
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*
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* See the _sre.c file for information on usage and redistribution.
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*/
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#ifndef SRE_INCLUDED
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#define SRE_INCLUDED
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#include "sre_constants.h"
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/* size of a code word (must be unsigned short or larger) */
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#define SRE_CODE unsigned short
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typedef struct {
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PyObject_VAR_HEAD
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int groups;
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PyObject* groupindex;
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PyObject* indexgroup;
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/* compatibility */
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PyObject* pattern; /* pattern source (or None) */
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int flags; /* flags used when compiling pattern source */
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/* pattern code */
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SRE_CODE code[1];
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} PatternObject;
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#define PatternObject_GetCode(o) (((PatternObject*)(o))->code)
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typedef struct {
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PyObject_VAR_HEAD
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PyObject* string; /* link to the target string */
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PatternObject* pattern; /* link to the regex (pattern) object */
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int pos, endpos; /* current target slice */
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int lastindex; /* last index marker seen by the engine (-1 if none) */
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int groups; /* number of groups (start/end marks) */
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int mark[1];
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} MatchObject;
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typedef unsigned int (*SRE_TOLOWER_HOOK)(unsigned int ch);
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typedef struct {
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/* stack elements */
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SRE_CODE* pattern;
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void* ptr;
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} SRE_STACK;
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/* FIXME: <fl> shouldn't be a constant, really... */
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#define SRE_MARK_SIZE 200
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typedef struct {
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/* string pointers */
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void* ptr; /* current position (also end of current slice) */
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void* beginning; /* start of original string */
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void* start; /* start of current slice */
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void* end; /* end of original string */
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/* character size */
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int charsize;
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/* registers */
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int lastindex;
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int lastmark;
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void* mark[SRE_MARK_SIZE];
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/* backtracking stack */
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SRE_STACK* stack;
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int stacksize;
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int stackbase;
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/* hooks */
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SRE_TOLOWER_HOOK lower;
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} SRE_STATE;
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typedef struct {
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/* scanner (internal helper object) */
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PyObject_HEAD
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PyObject* pattern;
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PyObject* string;
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SRE_STATE state;
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} ScannerObject;
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#endif
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