77 lines
2.0 KiB
C++
77 lines
2.0 KiB
C++
/*
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Copyright (C) 2002 Andrea Mazzoleni ( http://advancemame.sf.net )
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Copyright (C) 2001-4 Igor Pavlov ( http://www.7-zip.org )
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License version 2.1 as published by the Free Software Foundation.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __STREAM_INBYTE_H
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#define __STREAM_INBYTE_H
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#include "iiostrm.h"
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namespace NStream {
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class CInByte
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{
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UINT64 m_ProcessedSize;
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BYTE *m_BufferBase;
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UINT32 m_BufferSize;
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BYTE *m_Buffer;
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BYTE *m_BufferLimit;
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ISequentialInStream* m_Stream;
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bool m_StreamWasExhausted;
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bool ReadBlock();
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public:
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CInByte(UINT32 aBufferSize = 0x100000);
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~CInByte();
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void Init(ISequentialInStream *aStream);
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bool ReadByte(BYTE &aByte)
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{
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if(m_Buffer >= m_BufferLimit)
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if(!ReadBlock())
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return false;
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aByte = *m_Buffer++;
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return true;
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}
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BYTE ReadByte()
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{
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if(m_Buffer >= m_BufferLimit)
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if(!ReadBlock())
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return 0x0;
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return *m_Buffer++;
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}
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void ReadBytes(void *aData, UINT32 aSize, UINT32 &aProcessedSize)
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{
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for(aProcessedSize = 0; aProcessedSize < aSize; aProcessedSize++)
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if (!ReadByte(((BYTE *)aData)[aProcessedSize]))
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return;
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}
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bool ReadBytes(void *aData, UINT32 aSize)
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{
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UINT32 aProcessedSize;
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ReadBytes(aData, aSize, aProcessedSize);
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return (aProcessedSize == aSize);
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}
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UINT64 GetProcessedSize() const { return m_ProcessedSize + (m_Buffer - m_BufferBase); }
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};
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}
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#endif
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