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// OutBuffer.cpp
#include "StdAfx.h"
#include "../../../C/Alloc.h"
#include "OutBuffer.h"
bool COutBuffer::Create(UInt32 bufSize) throw()
{
const UInt32 kMinBlockSize = 1;
if (bufSize < kMinBlockSize)
bufSize = kMinBlockSize;
if (_buf != 0 && _bufSize == bufSize)
return true;
Free();
_bufSize = bufSize;
_buf = (Byte *)::MidAlloc(bufSize);
return (_buf != 0);
}
void COutBuffer::Free() throw()
{
::MidFree(_buf);
_buf = 0;
}
void COutBuffer::Init() throw()
{
_streamPos = 0;
_limitPos = _bufSize;
_pos = 0;
_processedSize = 0;
_overDict = false;
#ifdef _NO_EXCEPTIONS
ErrorCode = S_OK;
#endif
}
UInt64 COutBuffer::GetProcessedSize() const throw()
{
UInt64 res = _processedSize + _pos - _streamPos;
if (_streamPos > _pos)
res += _bufSize;
return res;
}
HRESULT COutBuffer::FlushPart() throw()
{
// _streamPos < _bufSize
UInt32 size = (_streamPos >= _pos) ? (_bufSize - _streamPos) : (_pos - _streamPos);
HRESULT result = S_OK;
#ifdef _NO_EXCEPTIONS
result = ErrorCode;
#endif
if (_buf2 != 0)
{
memcpy(_buf2, _buf + _streamPos, size);
_buf2 += size;
}
if (_stream != 0
#ifdef _NO_EXCEPTIONS
&& (ErrorCode == S_OK)
#endif
)
{
UInt32 processedSize = 0;
result = _stream->Write(_buf + _streamPos, size, &processedSize);
size = processedSize;
}
_streamPos += size;
if (_streamPos == _bufSize)
_streamPos = 0;
if (_pos == _bufSize)
{
_overDict = true;
_pos = 0;
}
_limitPos = (_streamPos > _pos) ? _streamPos : _bufSize;
_processedSize += size;
return result;
}
HRESULT COutBuffer::Flush() throw()
{
#ifdef _NO_EXCEPTIONS
if (ErrorCode != S_OK)
return ErrorCode;
#endif
while (_streamPos != _pos)
{
HRESULT result = FlushPart();
if (result != S_OK)
return result;
}
return S_OK;
}
void COutBuffer::FlushWithCheck()
{
HRESULT result = Flush();
#ifdef _NO_EXCEPTIONS
ErrorCode = result;
#else
if (result != S_OK)
throw COutBufferException(result);
#endif
}
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