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// Copyright (C) Filippo Cucchetto <filippocucchetto@gmail.com>
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0+ OR GPL-3.0 WITH Qt-GPL-exception-1.0
#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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