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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the utils of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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
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