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// Copyright (C) 2002-2012 Nikolaus Gebhardt
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in irrlicht.h
#ifndef __C_LIMIT_READ_FILE_H_INCLUDED__
#define __C_LIMIT_READ_FILE_H_INCLUDED__
#include "IReadFile.h"
#include "irrString.h"
namespace irr
{
class CUnicodeConverter;
namespace io
{
/*! this is a read file, which is limited to some boundaries,
so that it may only start from a certain file position
and may only read until a certain file position.
This can be useful, for example for reading uncompressed files
in an archive (zip, tar).
!*/
class CLimitReadFile : public IReadFile
{
public:
CLimitReadFile(IReadFile* alreadyOpenedFile, long pos, long areaSize, const io::path& name);
virtual ~CLimitReadFile();
//! returns how much was read
virtual s32 read(void* buffer, u32 sizeToRead);
//! changes position in file, returns true if successful
//! if relativeMovement==true, the pos is changed relative to current pos,
//! otherwise from begin of file
virtual bool seek(long finalPos, bool relativeMovement = false);
//! returns size of file
virtual long getSize() const;
//! returns where in the file we are.
virtual long getPos() const;
//! returns name of file
virtual const io::path& getFileName() const;
private:
io::path Filename;
long AreaStart;
long AreaEnd;
long Pos;
IReadFile* File;
};
} // end namespace io
} // end namespace irr
#endif
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