diff options
Diffstat (limited to 'src/libs/3rdparty/7zip/win/CPP/7zip/Compress/Lzma2Decoder.cpp')
| -rw-r--r-- | src/libs/3rdparty/7zip/win/CPP/7zip/Compress/Lzma2Decoder.cpp | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/src/libs/3rdparty/7zip/win/CPP/7zip/Compress/Lzma2Decoder.cpp b/src/libs/3rdparty/7zip/win/CPP/7zip/Compress/Lzma2Decoder.cpp new file mode 100644 index 000000000..b20ae5f5e --- /dev/null +++ b/src/libs/3rdparty/7zip/win/CPP/7zip/Compress/Lzma2Decoder.cpp @@ -0,0 +1,189 @@ +// Lzma2Decoder.cpp + +#include "StdAfx.h" + +#include "../../../C/Alloc.h" + +#include "../Common/StreamUtils.h" + +#include "Lzma2Decoder.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_PROGRESS: return E_ABORT; + case SZ_ERROR_DATA: return S_FALSE; + } + return E_FAIL; +} + +namespace NCompress { +namespace NLzma2 { + +static const UInt32 kInBufSize = 1 << 20; + +CDecoder::CDecoder(): _inBuf(0), _outSizeDefined(false) +{ + Lzma2Dec_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() +{ + Lzma2Dec_Free(&_state, &g_Alloc); + MyFree(_inBuf); +} + +STDMETHODIMP CDecoder::SetDecoderProperties2(const Byte *prop, UInt32 size) +{ + if (size != 1) return SZ_ERROR_UNSUPPORTED; + RINOK(SResToHRESULT(Lzma2Dec_Allocate(&_state, prop[0], &g_Alloc))); + if (_inBuf == 0) + { + _inBuf = (Byte *)MyAlloc(kInBufSize); + if (_inBuf == 0) + return E_OUTOFMEMORY; + } + + return S_OK; +} + +STDMETHODIMP CDecoder::GetInStreamProcessedSize(UInt64 *value) { *value = _inSizeProcessed; return S_OK; } +STDMETHODIMP CDecoder::SetInStream(ISequentialInStream *inStream) { _inStream = inStream; return S_OK; } +STDMETHODIMP CDecoder::ReleaseInStream() { _inStream.Release(); return S_OK; } + +STDMETHODIMP CDecoder::SetOutStreamSize(const UInt64 *outSize) +{ + _outSizeDefined = (outSize != NULL); + if (_outSizeDefined) + _outSize = *outSize; + + Lzma2Dec_Init(&_state); + + _inPos = _inSize = 0; + _inSizeProcessed = _outSizeProcessed = 0; + return S_OK; +} + +STDMETHODIMP CDecoder::Code(ISequentialInStream *inStream, + ISequentialOutStream *outStream, const UInt64 * /* inSize */, + const UInt64 *outSize, ICompressProgressInfo *progress) +{ + if (_inBuf == 0) + return S_FALSE; + SetOutStreamSize(outSize); + + for (;;) + { + if (_inPos == _inSize) + { + _inPos = _inSize = 0; + RINOK(inStream->Read(_inBuf, kInBufSize, &_inSize)); + } + + SizeT dicPos = _state.decoder.dicPos; + SizeT curSize = _state.decoder.dicBufSize - dicPos; + const UInt32 kStepSize = ((UInt32)1 << 22); + if (curSize > kStepSize) + curSize = (SizeT)kStepSize; + + ELzmaFinishMode finishMode = LZMA_FINISH_ANY; + if (_outSizeDefined) + { + const UInt64 rem = _outSize - _outSizeProcessed; + if (rem < curSize) + { + curSize = (SizeT)rem; + /* + // finishMode = LZMA_FINISH_END; + we can't use LZMA_FINISH_END here to allow partial decoding + */ + } + } + + SizeT inSizeProcessed = _inSize - _inPos; + ELzmaStatus status; + SRes res = Lzma2Dec_DecodeToDic(&_state, dicPos + curSize, _inBuf + _inPos, &inSizeProcessed, finishMode, &status); + + _inPos += (UInt32)inSizeProcessed; + _inSizeProcessed += inSizeProcessed; + SizeT outSizeProcessed = _state.decoder.dicPos - dicPos; + _outSizeProcessed += outSizeProcessed; + + bool finished = (inSizeProcessed == 0 && outSizeProcessed == 0); + bool stopDecoding = (_outSizeDefined && _outSizeProcessed >= _outSize); + + if (res != 0 || _state.decoder.dicPos == _state.decoder.dicBufSize || finished || stopDecoding) + { + HRESULT res2 = WriteStream(outStream, _state.decoder.dic, _state.decoder.dicPos); + if (res != 0) + return S_FALSE; + RINOK(res2); + if (stopDecoding) + return S_OK; + if (finished) + return (status == LZMA_STATUS_FINISHED_WITH_MARK ? S_OK : S_FALSE); + } + if (_state.decoder.dicPos == _state.decoder.dicBufSize) + _state.decoder.dicPos = 0; + + if (progress != NULL) + { + RINOK(progress->SetRatioInfo(&_inSizeProcessed, &_outSizeProcessed)); + } + } +} + +#ifndef NO_READ_FROM_CODER + +STDMETHODIMP CDecoder::Read(void *data, UInt32 size, UInt32 *processedSize) +{ + if (processedSize) + *processedSize = 0; + do + { + if (_inPos == _inSize) + { + _inPos = _inSize = 0; + RINOK(_inStream->Read(_inBuf, kInBufSize, &_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 = Lzma2Dec_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; +} + +#endif + +}} |