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91 lines
1.8 KiB
C++
91 lines
1.8 KiB
C++
/*
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* CMemoryBuffer.h, part of VCMI engine
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*
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* Authors: listed in file AUTHORS in main folder
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*
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* License: GNU General Public License v2.0 or later
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* Full text of license available in license.txt file, in main folder
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*
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*/
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#pragma once
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#include "CInputOutputStream.h"
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VCMI_LIB_NAMESPACE_BEGIN
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/**
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* A class which provides IO memory buffer.
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*/
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class DLL_LINKAGE CMemoryBuffer : public CInputOutputStream
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{
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public:
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using TBuffer = std::vector<ui8>;
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/**
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* C-tor.
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*
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*/
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CMemoryBuffer();
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/**
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* Write n bytes from the stream into the data buffer.
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*
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* @param data A pointer to the destination data array.
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* @param size The number of bytes to write.
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* @return the number of bytes written actually.
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*/
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si64 write(const ui8 * data, si64 size) override;
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/**
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* Reads n bytes from the stream into the data buffer.
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*
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* @param data A pointer to the destination data array.
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* @param size The number of bytes to read.
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* @return the number of bytes read actually.
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*/
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si64 read(ui8 * data, si64 size) override;
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/**
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* Seeks the internal read pointer to the specified position.
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*
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* @param position The read position from the beginning.
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* @return the position actually moved to, -1 on error.
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*/
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si64 seek(si64 position) override;
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/**
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* Gets the current read position in the stream.
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*
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* @return the read position.
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*/
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si64 tell() override;
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/**
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* Skips delta numbers of bytes.
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*
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* @param delta The count of bytes to skip.
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* @return the count of bytes skipped actually.
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*/
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si64 skip(si64 delta) override;
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/**
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* Gets the length in bytes of the stream.
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*
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* @return the length in bytes of the stream.
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*/
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si64 getSize() override;
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const TBuffer & getBuffer(){return buffer;}
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private:
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/** Actual data. */
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TBuffer buffer;
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/** Current reading position of the stream. */
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si64 position;
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};
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VCMI_LIB_NAMESPACE_END
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