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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
namespace Scintilla::Internal {
class CharacterIndexer {
public:
virtual char CharAt(Sci::Position index) const=0;
virtual ~CharacterIndexer() {
}
};
class RESearch {
public:
explicit RESearch(CharClassify *charClassTable);
// No dynamic allocation so default copy constructor and assignment operator are OK.
~RESearch();
void Clear() noexcept;
void GrabMatches(const CharacterIndexer &ci);
const char *Compile(const char *pattern, Sci::Position length, bool caseSensitive, bool posix) noexcept;
int Execute(const CharacterIndexer &ci, Sci::Position lp, Sci::Position endp);
static constexpr int MAXTAG = 10;
static constexpr int NOTFOUND = -1;
Sci::Position bopat[MAXTAG];
Sci::Position eopat[MAXTAG];
std::string pat[MAXTAG];
private:
static constexpr int MAXNFA = 4096;
// The following constants are not meant to be changeable.
// They are for readability only.
static constexpr int MAXCHR = 256;
static constexpr int CHRBIT = 8;
static constexpr int BITBLK = MAXCHR / CHRBIT;
void ChSet(unsigned char c) noexcept;
void ChSetWithCase(unsigned char c, bool caseSensitive) noexcept;
int GetBackslashExpression(const char *pattern, int &incr) noexcept;
Sci::Position PMatch(const CharacterIndexer &ci, Sci::Position lp, Sci::Position endp, char *ap);
Sci::Position bol;
Sci::Position 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 noexcept {
return charClass->IsWord(x);
}
};
}
#endif
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