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/****************************************************************************
**
** Copyright (C) Filippo Cucchetto <filippocucchetto@gmail.com>
** Contact: http://www.qt.io/licensing
**
** 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 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.
**
****************************************************************************/
#pragma once
#include <QChar>
#include <QString>
namespace Nim {
class SourceCodeStream
{
public:
SourceCodeStream(const QChar *text, int length)
: m_text(text)
, m_textLength(length)
, m_position(0)
, m_markedPosition(0)
{}
inline void setAnchor()
{
m_markedPosition = m_position;
}
inline void move(int amount = 1)
{
m_position += amount;
}
inline void moveToEnd()
{
m_position = m_textLength;
}
inline int pos()
{
return m_position;
}
inline int length() const
{
return m_position - m_markedPosition;
}
inline int anchor() const
{
return m_markedPosition;
}
inline bool isEnd() const
{
return m_position >= m_textLength;
}
inline QChar peek(int offset = 0) const
{
int pos = m_position + offset;
if (pos >= m_textLength)
return QLatin1Char('\0');
return m_text[pos];
}
inline QString value() const
{
const QChar *start = m_text + m_markedPosition;
return QString(start, length());
}
inline QString value(int begin, int length) const
{
return QString(m_text + begin, length);
}
private:
const QChar *m_text;
const int m_textLength;
int m_position;
int m_markedPosition;
};
}
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