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