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author | Lars Knoll <lars.knoll@nokia.com> | 2009-03-23 09:34:13 (GMT) |
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committer | Simon Hausmann <simon.hausmann@nokia.com> | 2009-03-23 09:34:13 (GMT) |
commit | 67ad0519fd165acee4a4d2a94fa502e9e4847bd0 (patch) | |
tree | 1dbf50b3dff8d5ca7e9344733968c72704eb15ff /util/lexgen/re2nfa.h | |
download | Qt-67ad0519fd165acee4a4d2a94fa502e9e4847bd0.zip Qt-67ad0519fd165acee4a4d2a94fa502e9e4847bd0.tar.gz Qt-67ad0519fd165acee4a4d2a94fa502e9e4847bd0.tar.bz2 |
Long live Qt!
Diffstat (limited to 'util/lexgen/re2nfa.h')
-rw-r--r-- | util/lexgen/re2nfa.h | 116 |
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> ¯os, 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 + |