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// 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
#ifdef SCI_NAMESPACE
namespace Scintilla {
#endif
/*
* The following defines are not meant to be changeable.
* They are for readability only.
*/
#define MAXCHR 256
#define CHRBIT 8
#define BITBLK MAXCHR/CHRBIT
class CharacterIndexer {
public:
virtual char CharAt(int index)=0;
virtual ~CharacterIndexer() {
}
};
class RESearch {
public:
explicit RESearch(CharClassify *charClassTable);
~RESearch();
void Clear();
void GrabMatches(CharacterIndexer &ci);
const char *Compile(const char *pattern, int length, bool caseSensitive, bool posix);
int Execute(CharacterIndexer &ci, int lp, int endp);
enum { MAXTAG=10 };
enum { MAXNFA=4096 };
enum { NOTFOUND=-1 };
int bopat[MAXTAG];
int eopat[MAXTAG];
std::string pat[MAXTAG];
private:
void ChSet(unsigned char c);
void ChSetWithCase(unsigned char c, bool caseSensitive);
int GetBackslashExpression(const char *pattern, int &incr);
int PMatch(CharacterIndexer &ci, int lp, int endp, char *ap);
int bol;
int tagstk[MAXTAG]; /* subpat tag stack */
char nfa[MAXNFA]; /* automaton */
int sta;
unsigned char bittab[BITBLK]; /* bit table for CCL pre-set bits */
int failure;
CharClassify *charClass;
bool iswordc(unsigned char x) const {
return charClass->IsWord(x);
}
};
#ifdef SCI_NAMESPACE
}
#endif
#endif
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