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// LzmaDecoder.cpp
#include "StdAfx.h"
#include "../../../C/Alloc.h"
#include "../Common/StreamUtils.h"
#include "LzmaDecoder.h"
static HRESULT SResToHRESULT(SRes res)
{
switch(res)
{
case SZ_OK: return S_OK;
case SZ_ERROR_MEM: return E_OUTOFMEMORY;
case SZ_ERROR_PARAM: return E_INVALIDARG;
case SZ_ERROR_UNSUPPORTED: return E_NOTIMPL;
case SZ_ERROR_DATA: return S_FALSE;
}
return E_FAIL;
}
namespace NCompress {
namespace NLzma {
CDecoder::CDecoder(): _inBuf(0), _propsWereSet(false), _outSizeDefined(false),
_inBufSize(1 << 20),
_outBufSize(1 << 22),
FinishStream(false),
NeedMoreInput(false)
{
_inSizeProcessed = 0;
_inPos = _inSize = 0;
LzmaDec_Construct(&_state);
}
static void *SzAlloc(void *p, size_t size) { p = p; return MyAlloc(size); }
static void SzFree(void *p, void *address) { p = p; MyFree(address); }
static ISzAlloc g_Alloc = { SzAlloc, SzFree };
CDecoder::~CDecoder()
{
LzmaDec_Free(&_state, &g_Alloc);
MyFree(_inBuf);
}
STDMETHODIMP CDecoder::SetInBufSize(UInt32 , UInt32 size) { _inBufSize = size; return S_OK; }
STDMETHODIMP CDecoder::SetOutBufSize(UInt32 , UInt32 size) { _outBufSize = size; return S_OK; }
HRESULT CDecoder::CreateInputBuffer()
{
if (_inBuf == 0 || _inBufSize != _inBufSizeAllocated)
{
MyFree(_inBuf);
_inBuf = (Byte *)MyAlloc(_inBufSize);
if (_inBuf == 0)
return E_OUTOFMEMORY;
_inBufSizeAllocated = _inBufSize;
}
return S_OK;
}
STDMETHODIMP CDecoder::SetDecoderProperties2(const Byte *prop, UInt32 size)
{
RINOK(SResToHRESULT(LzmaDec_Allocate(&_state, prop, size, &g_Alloc)));
_propsWereSet = true;
return CreateInputBuffer();
}
void CDecoder::SetOutStreamSizeResume(const UInt64 *outSize)
{
_outSizeDefined = (outSize != NULL);
if (_outSizeDefined)
_outSize = *outSize;
_outSizeProcessed = 0;
_wrPos = 0;
LzmaDec_Init(&_state);
}
STDMETHODIMP CDecoder::SetOutStreamSize(const UInt64 *outSize)
{
_inSizeProcessed = 0;
_inPos = _inSize = 0;
NeedMoreInput = false;
SetOutStreamSizeResume(outSize);
return S_OK;
}
HRESULT CDecoder::CodeSpec(ISequentialInStream *inStream, ISequentialOutStream *outStream, ICompressProgressInfo *progress)
{
if (_inBuf == 0 || !_propsWereSet)
return S_FALSE;
UInt64 startInProgress = _inSizeProcessed;
SizeT next = (_state.dicBufSize - _state.dicPos < _outBufSize) ? _state.dicBufSize : (_state.dicPos + _outBufSize);
for (;;)
{
if (_inPos == _inSize)
{
_inPos = _inSize = 0;
RINOK(inStream->Read(_inBuf, _inBufSizeAllocated, &_inSize));
}
SizeT dicPos = _state.dicPos;
SizeT curSize = next - dicPos;
ELzmaFinishMode finishMode = LZMA_FINISH_ANY;
if (_outSizeDefined)
{
const UInt64 rem = _outSize - _outSizeProcessed;
if (rem <= curSize)
{
curSize = (SizeT)rem;
if (FinishStream)
finishMode = LZMA_FINISH_END;
}
}
SizeT inSizeProcessed = _inSize - _inPos;
ELzmaStatus status;
SRes res = LzmaDec_DecodeToDic(&_state, dicPos + curSize, _inBuf + _inPos, &inSizeProcessed, finishMode, &status);
_inPos += (UInt32)inSizeProcessed;
_inSizeProcessed += inSizeProcessed;
SizeT outSizeProcessed = _state.dicPos - dicPos;
_outSizeProcessed += outSizeProcessed;
bool finished = (inSizeProcessed == 0 && outSizeProcessed == 0);
bool stopDecoding = (_outSizeDefined && _outSizeProcessed >= _outSize);
if (res != 0 || _state.dicPos == next || finished || stopDecoding)
{
HRESULT res2 = WriteStream(outStream, _state.dic + _wrPos, _state.dicPos - _wrPos);
_wrPos = _state.dicPos;
if (_state.dicPos == _state.dicBufSize)
{
_state.dicPos = 0;
_wrPos = 0;
}
next = (_state.dicBufSize - _state.dicPos < _outBufSize) ? _state.dicBufSize : (_state.dicPos + _outBufSize);
if (res != 0)
return S_FALSE;
RINOK(res2);
if (stopDecoding)
{
if (status == LZMA_STATUS_NEEDS_MORE_INPUT)
NeedMoreInput = true;
if (FinishStream &&
status != LZMA_STATUS_FINISHED_WITH_MARK &&
status != LZMA_STATUS_MAYBE_FINISHED_WITHOUT_MARK)
return S_FALSE;
return S_OK;
}
if (finished)
{
if (status == LZMA_STATUS_NEEDS_MORE_INPUT)
NeedMoreInput = true;
return (status == LZMA_STATUS_FINISHED_WITH_MARK ? S_OK : S_FALSE);
}
}
if (progress)
{
UInt64 inSize = _inSizeProcessed - startInProgress;
RINOK(progress->SetRatioInfo(&inSize, &_outSizeProcessed));
}
}
}
STDMETHODIMP CDecoder::Code(ISequentialInStream *inStream, ISequentialOutStream *outStream,
const UInt64 * /* inSize */, const UInt64 *outSize, ICompressProgressInfo *progress)
{
if (_inBuf == 0)
return E_INVALIDARG;
SetOutStreamSize(outSize);
return CodeSpec(inStream, outStream, progress);
}
#ifndef NO_READ_FROM_CODER
STDMETHODIMP CDecoder::SetInStream(ISequentialInStream *inStream) { _inStream = inStream; return S_OK; }
STDMETHODIMP CDecoder::ReleaseInStream() { _inStream.Release(); return S_OK; }
STDMETHODIMP CDecoder::Read(void *data, UInt32 size, UInt32 *processedSize)
{
if (processedSize)
*processedSize = 0;
do
{
if (_inPos == _inSize)
{
_inPos = _inSize = 0;
RINOK(_inStream->Read(_inBuf, _inBufSizeAllocated, &_inSize));
}
{
SizeT inProcessed = _inSize - _inPos;
if (_outSizeDefined)
{
const UInt64 rem = _outSize - _outSizeProcessed;
if (rem < size)
size = (UInt32)rem;
}
SizeT outProcessed = size;
ELzmaStatus status;
SRes res = LzmaDec_DecodeToBuf(&_state, (Byte *)data, &outProcessed,
_inBuf + _inPos, &inProcessed, LZMA_FINISH_ANY, &status);
_inPos += (UInt32)inProcessed;
_inSizeProcessed += inProcessed;
_outSizeProcessed += outProcessed;
size -= (UInt32)outProcessed;
data = (Byte *)data + outProcessed;
if (processedSize)
*processedSize += (UInt32)outProcessed;
RINOK(SResToHRESULT(res));
if (inProcessed == 0 && outProcessed == 0)
return S_OK;
}
}
while (size != 0);
return S_OK;
}
HRESULT CDecoder::CodeResume(ISequentialOutStream *outStream, const UInt64 *outSize, ICompressProgressInfo *progress)
{
SetOutStreamSizeResume(outSize);
return CodeSpec(_inStream, outStream, progress);
}
HRESULT CDecoder::ReadFromInputStream(void *data, UInt32 size, UInt32 *processedSize)
{
RINOK(CreateInputBuffer());
if (processedSize)
*processedSize = 0;
while (size > 0)
{
if (_inPos == _inSize)
{
_inPos = _inSize = 0;
RINOK(_inStream->Read(_inBuf, _inBufSizeAllocated, &_inSize));
if (_inSize == 0)
break;
}
{
UInt32 curSize = _inSize - _inPos;
if (curSize > size)
curSize = size;
memcpy(data, _inBuf + _inPos, curSize);
_inPos += curSize;
_inSizeProcessed += curSize;
size -= curSize;
data = (Byte *)data + curSize;
if (processedSize)
*processedSize += curSize;
}
}
return S_OK;
}
#endif
}}
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