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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
**
** 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 Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** 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, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
****************************************************************************/
#ifndef GLSLLEXER_H
#define GLSLLEXER_H
#include "glsl.h"
#include <qstring.h>
#include <qstringlist.h>
namespace GLSL {
class GLSL_EXPORT Token
{
public:
int kind;
int position;
int length;
int line; // ### remove
union {
int matchingBrace;
int i; // integer value
const QString *string; // string value
void *ptr;
};
Token()
: kind(0), position(0), length(0), line(0), ptr(0) {}
bool is(int k) const { return k == kind; }
bool isNot(int k) const { return k != kind; }
int begin() const { return position; }
int end() const { return position + length; }
};
class GLSL_EXPORT Lexer
{
public:
Lexer(Engine *engine, const char *source, unsigned size);
~Lexer();
enum
{
// Extra flag bits added to tokens by Lexer::classify() that
// indicate which variant of GLSL the keyword belongs to.
Variant_GLSL_120 = 0x00010000, // 1.20 and higher
Variant_GLSL_150 = 0x00020000, // 1.50 and higher
Variant_GLSL_400 = 0x00040000, // 4.00 and higher
Variant_GLSL_ES_100 = 0x00080000, // ES 1.00 and higher
Variant_VertexShader = 0x00200000,
Variant_FragmentShader = 0x00400000,
Variant_Reserved = 0x80000000,
Variant_Mask = 0xFFFF0000,
Variant_All = 0xFFFF0000
};
union Value {
int i;
const QString *string;
void *ptr;
};
Engine *engine() const { return _engine; }
int state() const { return _state; }
void setState(int state) { _state = state; }
int variant() const { return _variant; }
void setVariant(int flags) { _variant = flags; }
bool scanKeywords() const { return _scanKeywords; }
void setScanKeywords(bool scanKeywords) { _scanKeywords = scanKeywords; }
bool scanComments() const { return _scanComments; }
void setScanComments(bool scanComments) { _scanComments = scanComments; }
int yylex(Token *tk);
int findKeyword(const char *word, int length) const;
void *yyval() const { return _yyval.ptr; }
static QStringList keywords(int variant);
private:
static int classify(const char *s, int len);
void yyinp();
int yylex_helper(const char **position, int *line);
void warning(int line, const QString &message);
void error(int line, const QString &message);
private:
Engine *_engine;
const char *_source;
const char *_it;
int _size;
int _yychar;
int _lineno;
int _state;
int _variant;
unsigned _scanKeywords: 1;
unsigned _scanComments: 1;
Value _yyval;
};
} // namespace GLSL
#endif // GLSLLEXER_H
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