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#include "LZMADecoder.h"
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#include "../../../Common/Defs.h"
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#include "../../Common/StreamUtils.h"
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#include "../../../../C/Alloc.h"
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static HRESULT SResToHRESULT(SRes res)
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case SZ_OK: return S_OK;
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case SZ_ERROR_MEM: return E_OUTOFMEMORY;
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case SZ_ERROR_PARAM: return E_INVALIDARG;
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// case SZ_ERROR_PROGRESS: return E_ABORT;
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case SZ_ERROR_DATA: return S_FALSE;
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static const UInt32 kInBufSize = 1 << 20;
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CDecoder::CDecoder(): _inBuf(0), _outSizeDefined(false)
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LzmaDec_Construct(&_state);
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static void *SzAlloc(void *p, size_t size) { p = p; return MyAlloc(size); }
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static void SzFree(void *p, void *address) { p = p; MyFree(address); }
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static ISzAlloc g_Alloc = { SzAlloc, SzFree };
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LzmaDec_Free(&_state, &g_Alloc);
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STDMETHODIMP CDecoder::SetDecoderProperties2(const Byte *prop, UInt32 size)
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RINOK(SResToHRESULT(LzmaDec_Allocate(&_state, prop, size, &g_Alloc)));
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_inBuf = (Byte *)MyAlloc(kInBufSize);
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STDMETHODIMP CDecoder::GetInStreamProcessedSize(UInt64 *value) { *value = _inSizeProcessed; return S_OK; }
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STDMETHODIMP CDecoder::SetInStream(ISequentialInStream *inStream) { _inStream = inStream; return S_OK; }
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STDMETHODIMP CDecoder::ReleaseInStream() { _inStream.Release(); return S_OK; }
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STDMETHODIMP CDecoder::SetOutStreamSize(const UInt64 *outSize)
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_outSizeDefined = (outSize != NULL);
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LzmaDec_Init(&_state);
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_inSizeProcessed = _outSizeProcessed = 0;
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STDMETHODIMP CDecoder::Code(ISequentialInStream *inStream,
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ISequentialOutStream *outStream, const UInt64 * /* inSize */,
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const UInt64 *outSize, ICompressProgressInfo *progress)
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SetOutStreamSize(outSize);
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if (_inPos == _inSize)
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RINOK(inStream->Read(_inBuf, kInBufSize, &_inSize));
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SizeT dicPos = _state.dicPos;
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SizeT curSize = _state.dicBufSize - dicPos;
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const UInt32 kStepSize = ((UInt32)1 << 22);
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if (curSize > kStepSize)
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curSize = (SizeT)kStepSize;
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ELzmaFinishMode finishMode = LZMA_FINISH_ANY;
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const UInt64 rem = _outSize - _outSizeProcessed;
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curSize = (SizeT)rem;
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// finishMode = LZMA_FINISH_END;
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we can't use LZMA_FINISH_END here to allow partial decoding
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SizeT inSizeProcessed = _inSize - _inPos;
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SRes res = LzmaDec_DecodeToDic(&_state, dicPos + curSize, _inBuf + _inPos, &inSizeProcessed, finishMode, &status);
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_inPos += (UInt32)inSizeProcessed;
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_inSizeProcessed += inSizeProcessed;
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SizeT outSizeProcessed = _state.dicPos - dicPos;
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_outSizeProcessed += outSizeProcessed;
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bool finished = (inSizeProcessed == 0 && outSizeProcessed == 0);
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bool stopDecoding = (_outSizeDefined && _outSizeProcessed >= _outSize);
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if (res != 0 || _state.dicPos == _state.dicBufSize || finished || stopDecoding)
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HRESULT res2 = WriteStream(outStream, _state.dic, _state.dicPos);
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return (status == LZMA_STATUS_FINISHED_WITH_MARK ? S_OK : S_FALSE);
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if (_state.dicPos == _state.dicBufSize)
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if (progress != NULL)
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RINOK(progress->SetRatioInfo(&_inSizeProcessed, &_outSizeProcessed));
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#ifndef NO_READ_FROM_CODER
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STDMETHODIMP CDecoder::Read(void *data, UInt32 size, UInt32 *processedSize)
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if (_inPos == _inSize)
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_inPos = _inSize = 0;
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RINOK(_inStream->Read(_inBuf, kInBufSize, &_inSize));
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SizeT inProcessed = _inSize - _inPos;
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const UInt64 rem = _outSize - _outSizeProcessed;
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SizeT outProcessed = size;
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SRes res = LzmaDec_DecodeToBuf(&_state, (Byte *)data, &outProcessed,
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_inBuf + _inPos, &inProcessed, LZMA_FINISH_ANY, &status);
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_inPos += (UInt32)inProcessed;
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_inSizeProcessed += inProcessed;
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_outSizeProcessed += outProcessed;
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size -= (UInt32)outProcessed;
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data = (Byte *)data + outProcessed;
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*processedSize += (UInt32)outProcessed;
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RINOK(SResToHRESULT(res));
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if (inProcessed == 0 && outProcessed == 0)