summaryrefslogtreecommitdiffstats
path: root/util/lexgen/re2nfa.h
diff options
context:
space:
mode:
Diffstat (limited to 'util/lexgen/re2nfa.h')
-rw-r--r--util/lexgen/re2nfa.h116
1 files changed, 116 insertions, 0 deletions
diff --git a/util/lexgen/re2nfa.h b/util/lexgen/re2nfa.h
new file mode 100644
index 0000000..fc10bea
--- /dev/null
+++ b/util/lexgen/re2nfa.h
@@ -0,0 +1,116 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the utils of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef RE2NFA_H
+#define RE2NFA_H
+
+#include "nfa.h"
+#include <QSet>
+
+class RE2NFA
+{
+public:
+ RE2NFA(const QMap<QString, NFA> &macros, const QSet<InputType> &maxInputSet, Qt::CaseSensitivity cs);
+
+ NFA parse(const QString &expression, int *errorColumn = 0);
+
+private:
+ NFA parseExpr();
+ NFA parseBranch();
+ NFA parsePiece();
+ NFA parseAtom();
+ NFA parseMaybeQuantifier(const NFA &nfa);
+ NFA parseSet();
+ NFA parseSet2();
+
+ NFA createCharNFA();
+
+private:
+ friend class RegExpTokenizer;
+
+ enum Token {
+ TOK_INVALID,
+ TOK_STRING,
+ TOK_LBRACE, // {
+ TOK_RBRACE, // }
+ TOK_LBRACKET, // [
+ TOK_RBRACKET, // ]
+ TOK_LPAREN, // (
+ TOK_RPAREN, // )
+ TOK_COMMA,
+ TOK_STAR,
+ TOK_OR,
+ TOK_QUESTION,
+ TOK_DOT,
+ TOK_PLUS,
+ TOK_SEQUENCE,
+ TOK_QUOTED_STRING
+ };
+
+ struct Symbol
+ {
+ inline Symbol() : token(TOK_INVALID), column(-1) {}
+ inline Symbol(Token t, const QString &l = QString()) : token(t), lexem(l), column(-1) {}
+ Token token;
+ QString lexem;
+ int column;
+ };
+
+ inline bool hasNext() const { return index < symbols.count(); }
+ inline Token next() { return symbols.at(index++).token; }
+ bool next(Token t);
+ bool test(Token t);
+ inline void prev() { index--; }
+ inline const Symbol &symbol() const { return symbols.at(index - 1); }
+ QString lexemUntil(Token t);
+
+ void tokenize(const QString &input);
+
+ QMap<QString, NFA> macros;
+ QVector<Symbol> symbols;
+ int index;
+ int errorColumn;
+ const QSet<InputType> maxInputSet;
+ Qt::CaseSensitivity caseSensitivity;
+};
+
+#endif // RE2NFA_H
+