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