MemoryReader.cpp
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MemoryReader.cpp
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	#include "MemoryReader.h"

	MemoryReader::MemoryReader(char const *ptr, qint64 len)
	{
	setData(ptr, len);
	}

	void MemoryReader::setData(char const *ptr, qint64 len)
	{
	begin = ptr;
	end = begin + len;
	}

	bool MemoryReader::isSequential() const
	{
	return false;
	}

	bool MemoryReader::open(OpenMode mode)
	{
	mode \|= QIODevice::Unbuffered;
	return QIODevice::open(mode \| QIODevice::Unbuffered);
	}

	qint64 MemoryReader::pos() const
	{
	return QIODevice::pos();
	}

	qint64 MemoryReader::size() const
	{
	if (begin && begin < end) {
	return end - begin;
	}
	return 0;
	}

	bool MemoryReader::seek(qint64 pos)
	{
	return QIODevice::seek(pos);
	}

	bool MemoryReader::atEnd() const
	{
	return QIODevice::atEnd();
	}

	bool MemoryReader::reset()
	{
	return begin && begin < end;
	}

	qint64 MemoryReader::bytesToWrite() const
	{
	return 0;
	}

	bool MemoryReader::canReadLine() const
	{
	return bytesAvailable() > 0;
	}

	bool MemoryReader::waitForReadyRead(int /msecs/)
	{
	return bytesAvailable() > 0;
	}

	bool MemoryReader::waitForBytesWritten(int /msecs/)
	{
	return false;
	}

	qint64 MemoryReader::readData(char *data, qint64 maxlen)
	{
	qint64 n = bytesAvailable();
	if (n > 0) {
	if (n > maxlen) {
	n = maxlen;
	}
	memcpy(data, begin + pos(), n);
	}
	return n;
	}

	qint64 MemoryReader::writeData(char const * /data/, qint64 /len/)
	{
	return 0;
	}