Initial commit

third-party/scintilla/RESearch.h

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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 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=2048 };
+	enum { NOTFOUND=-1 };
+
+	int bopat[MAXTAG];
+	int eopat[MAXTAG];
+	std::string pat[MAXTAG];
+
+private:
+	void Init();
+	void Clear();
+	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
+