// Scintilla source code edit control/** @file RESearch.h ** Interface to the regular expression search library. **/// Written by Neil Hodgson <neilh@scintilla.org>// Based on the work of Ozan S. Yigit.// This file is in the public domain.#ifndef RESEARCH_H#define RESEARCH_H/* * The following defines are not meant to be changeable. * They are for readability only. */#define MAXCHR	256#define CHRBIT	8#define BITBLK	MAXCHR/CHRBITclass CharacterIndexer {public:	virtual char CharAt(int index)=0;	virtual ~CharacterIndexer() {	}};class RESearch {public:	RESearch(CharClassify *charClassTable);	~RESearch();	bool GrabMatches(CharacterIndexer &ci);	const char *Compile(const char *pat, int length, bool caseSensitive, bool posix);	int Execute(CharacterIndexer &ci, int lp, int endp);	int Substitute(CharacterIndexer &ci, char *src, char *dst);	enum {MAXTAG=10};	enum {MAXNFA=2048};	enum {NOTFOUND=-1};	int bopat[MAXTAG];	int eopat[MAXTAG];	char *pat[MAXTAG];private:	void Init();	void Clear();	void ChSet(char c);	void ChSetWithCase(char c, bool caseSensitive);	int PMatch(CharacterIndexer &ci, int lp, int endp, char *ap);	int bol;	int  tagstk[MAXTAG]; /* subpat tag stack */	char nfa[MAXNFA];    /* automaton */	int sta;	char bittab[BITBLK]; /* bit table for CCL pre-set bits */	int failure;	CharClassify *charClass;	bool iswordc(unsigned char x) {		return charClass->IsWord(x);	}};#endif