--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/util/lexgen/generator.h Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,221 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#ifndef GENERATOR_H
+#define GENERATOR_H
+
+#include <QTextStream>
+#include <QStringList>
+
+#include "nfa.h"
+
+class LineStream
+{
+private:
+ struct SharedStream
+ {
+ int ref;
+ QTextStream *stream;
+ };
+
+public:
+ LineStream(QTextStream *textStream)
+ {
+ shared = new SharedStream;
+ shared->ref = 1;
+ shared->stream = textStream;
+ }
+ LineStream(const LineStream &other)
+ {
+ shared = other.shared;
+ shared->ref++;
+ }
+ LineStream &operator=(const LineStream &other)
+ {
+ if (this == &other)
+ return *this;
+ LineStream copy(other); // keep refcount up
+ qSwap(*shared, *other.shared);
+ return *this;
+ }
+ ~LineStream()
+ {
+ if (!--shared->ref) {
+ (*shared->stream) << endl;
+ delete shared;
+ }
+ }
+
+ template <typename T>
+ LineStream &operator<<(const T &value)
+ { (*shared->stream) << value; return *this; }
+
+ SharedStream *shared;
+};
+
+class CodeBlock
+{
+public:
+ inline CodeBlock() { stream.setString(&output, QIODevice::WriteOnly); }
+
+ inline void indent() { indentStr += QLatin1String(" "); }
+ inline void outdent() { indentStr.remove(0, 4); }
+
+ template <typename T>
+ LineStream operator<<(const T &value)
+ { stream << indentStr; stream << value; return LineStream(&stream); }
+
+ inline void addNewLine() { stream << endl; }
+
+ inline QString toString() const { stream.flush(); return output; }
+
+private:
+ QString output;
+ mutable QTextStream stream;
+ QString indentStr;
+};
+
+class Function
+{
+public:
+ inline Function(const QString &returnType, const QString &name)
+ : rtype(returnType), fname(name), iline(false), cnst(false) {}
+ inline Function() : iline(false), cnst(false) {}
+
+ inline void setName(const QString &name) { fname = name; }
+ inline QString name() const { return fname; }
+
+ inline void setInline(bool i) { iline = i; }
+ inline bool isInline() const { return iline; }
+
+ inline void setReturnType(const QString &type) { rtype = type; }
+ inline QString returnType() const { return rtype; }
+
+ inline void addBody(const QString &_body) { body += _body; }
+ inline void addBody(const CodeBlock &block) { body += block.toString(); }
+ inline bool hasBody() const { return !body.isEmpty(); }
+
+ inline void setConst(bool konst) { cnst = konst; }
+ inline bool isConst() const { return cnst; }
+
+ void printDeclaration(CodeBlock &block, const QString &funcNamePrefix = QString()) const;
+ QString definition() const;
+
+private:
+ QString signature(const QString &funcNamePrefix = QString()) const;
+
+ QString rtype;
+ QString fname;
+ QString body;
+ bool iline;
+ bool cnst;
+};
+
+class Class
+{
+public:
+ enum Access { PublicMember, ProtectedMember, PrivateMember };
+
+ inline Class(const QString &name) : cname(name) {}
+
+ inline void setName(const QString &name) { cname = name; }
+ inline QString name() const { return cname; }
+
+ inline void addMember(Access access, const QString &name)
+ { sections[access].variables.append(name); }
+ inline void addMember(Access access, const Function &func)
+ { sections[access].functions.append(func); }
+
+ void addConstructor(Access access, const QString &body, const QString &args = QString());
+ inline void addConstructor(Access access, const CodeBlock &body, const QString &args = QString())
+ { addConstructor(access, body.toString(), args); }
+
+ QString declaration() const;
+ QString definition() const;
+
+private:
+ QString cname;
+ struct Section
+ {
+ QVector<Function> functions;
+ QStringList variables;
+ QVector<Function> constructors;
+
+ inline bool isEmpty() const
+ { return functions.isEmpty() && variables.isEmpty() && constructors.isEmpty(); }
+
+ void printDeclaration(const Class *klass, CodeBlock &block) const;
+ QString definition(const Class *klass) const;
+ };
+
+ Section sections[3];
+};
+
+class Generator
+{
+public:
+ Generator(const DFA &dfa, const Config &config);
+
+ QString generate();
+
+private:
+ void generateTransitions(CodeBlock &body, const TransitionMap &transitions);
+ bool isSingleReferencedFinalState(int i) const;
+
+ DFA dfa;
+ Config cfg;
+ InputType minInput;
+ InputType maxInput;
+ QHash<int, int> backReferenceMap;
+ QString headerFileName;
+public:
+ struct TransitionSequence
+ {
+ inline TransitionSequence() : first(-1), last(-1), transition(-1) {}
+ InputType first;
+ InputType last;
+ int transition;
+ QString testFunction;
+ };
+private:
+ QVector<TransitionSequence> charFunctionRanges;
+};
+
+#endif