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54 lines
1.0 KiB
C++
54 lines
1.0 KiB
C++
/*
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* CMemoryStream.cpp, 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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#include "StdInc.h"
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#include "CMemoryStream.h"
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VCMI_LIB_NAMESPACE_BEGIN
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CMemoryStream::CMemoryStream(const ui8 * data, si64 size) :
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data(data), size(size), position(0)
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{
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}
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si64 CMemoryStream::read(ui8 * data, si64 size)
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{
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si64 toRead = std::min(this->size - tell(), size);
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std::copy(this->data + position, this->data + position + toRead, data);
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position += size;
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return toRead;
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}
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si64 CMemoryStream::seek(si64 position)
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{
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si64 origin = tell();
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this->position = std::min(position, size);
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return tell() - origin;
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}
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si64 CMemoryStream::tell()
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{
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return this->position;
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}
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si64 CMemoryStream::skip(si64 delta)
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{
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si64 origin = tell();
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this->position += std::min(size - origin, delta);
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return tell() - origin;
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}
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si64 CMemoryStream::getSize()
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{
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return size;
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}
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VCMI_LIB_NAMESPACE_END
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