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Diffstat (limited to '7zip/Archive/Cab/MSZipDecoder.cpp')
| -rwxr-xr-x | 7zip/Archive/Cab/MSZipDecoder.cpp | 268 |
1 files changed, 0 insertions, 268 deletions
diff --git a/7zip/Archive/Cab/MSZipDecoder.cpp b/7zip/Archive/Cab/MSZipDecoder.cpp deleted file mode 100755 index 9e004bf9..00000000 --- a/7zip/Archive/Cab/MSZipDecoder.cpp +++ /dev/null @@ -1,268 +0,0 @@ -// Archive/Cab/MSZipDecoder.cpp - -#include "StdAfx.h" - -#include "MSZipDecoder.h" - -#include "Windows/Defs.h" - -namespace NArchive { -namespace NCab { -namespace NMSZip { - -CDecoder::CDecoder(){} - -HRESULT CDecoder::Flush() -{ - return m_OutWindowStream.Flush(); -} - -void CDecoder::ReleaseStreams() -{ - m_OutWindowStream.ReleaseStream(); - m_InBitStream.ReleaseStream(); -} - -void CDecoder::DeCodeLevelTable(Byte *newLevels, int numLevels) -{ - int i = 0; - while (i < numLevels) - { - UInt32 number = m_LevelDecoder.DecodeSymbol(&m_InBitStream); - if (number < kTableDirectLevels) - newLevels[i++] = Byte(number); - else - { - if (number == kTableLevelRepNumber) - { - int t = m_InBitStream.ReadBits(2) + 3; - for (int reps = t; reps > 0 && i < numLevels ; reps--, i++) - newLevels[i] = newLevels[i - 1]; - } - else - { - int num; - if (number == kTableLevel0Number) - num = m_InBitStream.ReadBits(3) + 3; - else - num = m_InBitStream.ReadBits(7) + 11; - for (;num > 0 && i < numLevels; num--) - newLevels[i++] = 0; - } - } - } -} - -void CDecoder::ReadTables(void) -{ - if(m_FinalBlock) // test it - throw CDecoderException(CDecoderException::kData); - - m_FinalBlock = (m_InBitStream.ReadBits(kFinalBlockFieldSize) == NFinalBlockField::kFinalBlock); - - int blockType = m_InBitStream.ReadBits(kBlockTypeFieldSize); - - switch(blockType) - { - case NBlockType::kStored: - { - m_StoredMode = true; - UInt32 currentBitPosition = m_InBitStream.GetBitPosition(); - UInt32 numBitsForAlign = currentBitPosition > 0 ? (8 - currentBitPosition): 0; - if (numBitsForAlign > 0) - m_InBitStream.ReadBits(numBitsForAlign); - m_StoredBlockSize = m_InBitStream.ReadBits(kDeflateStoredBlockLengthFieldSizeSize); - WORD onesComplementReverse = ~WORD(m_InBitStream.ReadBits(kDeflateStoredBlockLengthFieldSizeSize)); - if (m_StoredBlockSize != onesComplementReverse) - throw CDecoderException(CDecoderException::kData); - break; - } - case NBlockType::kFixedHuffman: - case NBlockType::kDynamicHuffman: - { - m_StoredMode = false; - Byte litLenLevels[kStaticMainTableSize]; - Byte distLevels[kStaticDistTableSize]; - if (blockType == NBlockType::kFixedHuffman) - { - int i; - - // Leteral / length levels - for (i = 0; i < 144; i++) - litLenLevels[i] = 8; - for (; i < 256; i++) - litLenLevels[i] = 9; - for (; i < 280; i++) - litLenLevels[i] = 7; - for (; i < 288; i++) /* make a complete, but wrong code set */ - litLenLevels[i] = 8; - - // Distance levels - for (i = 0; i < kStaticDistTableSize; i++) // test it: infozip only use kDistTableSize - distLevels[i] = 5; - } - else // in case when (blockType == kDeflateBlockTypeFixedHuffman) - { - int numLitLenLevels = m_InBitStream.ReadBits(kDeflateNumberOfLengthCodesFieldSize) + - kDeflateNumberOfLitLenCodesMin; - int numDistLevels = m_InBitStream.ReadBits(kDeflateNumberOfDistanceCodesFieldSize) + - kDeflateNumberOfDistanceCodesMin; - int numLevelCodes = m_InBitStream.ReadBits(kDeflateNumberOfLevelCodesFieldSize) + - kDeflateNumberOfLevelCodesMin; - - int numLevels; - numLevels = kHeapTablesSizesSum; - - Byte levelLevels[kLevelTableSize]; - int i; - for (i = 0; i < kLevelTableSize; i++) - { - int position = kCodeLengthAlphabetOrder[i]; - if(i < numLevelCodes) - levelLevels[position] = Byte(m_InBitStream.ReadBits(kDeflateLevelCodeFieldSize)); - else - levelLevels[position] = 0; - } - - try - { - m_LevelDecoder.SetCodeLengths(levelLevels); - } - catch(...) - { - throw CDecoderException(CDecoderException::kData); - } - - Byte tmpLevels[kStaticMaxTableSize]; - DeCodeLevelTable(tmpLevels, numLitLenLevels + numDistLevels); - - memmove(litLenLevels, tmpLevels, numLitLenLevels); - memset(litLenLevels + numLitLenLevels, 0, - kStaticMainTableSize - numLitLenLevels); - - memmove(distLevels, tmpLevels + numLitLenLevels, numDistLevels); - memset(distLevels + numDistLevels, 0, kStaticDistTableSize - numDistLevels); - } - try - { - m_MainDecoder.SetCodeLengths(litLenLevels); - m_DistDecoder.SetCodeLengths(distLevels); - } - catch(...) - { - throw CDecoderException(CDecoderException::kData); - } - break; - } - default: - throw CDecoderException(CDecoderException::kData); - } -} - -class CCoderReleaser -{ - CDecoder *m_Coder; -public: - CCoderReleaser(CDecoder *aCoder): m_Coder(aCoder) {} - ~CCoderReleaser() - { - m_Coder->Flush(); - m_Coder->ReleaseStreams(); - } -}; - -STDMETHODIMP CDecoder::Code(ISequentialInStream *inStream, - ISequentialOutStream *outStream, const UInt64 *inSize, const UInt64 *outSize, - ICompressProgressInfo *progress) -{ - if (outSize == NULL) - return E_INVALIDARG; - UInt64 size = *outSize; - - if (!m_OutWindowStream.Create(kHistorySize)) - return E_OUTOFMEMORY; - if (!m_InBitStream.Create(1 << 20)) - return E_OUTOFMEMORY; - - m_OutWindowStream.SetStream(outStream); - m_OutWindowStream.Init(false); - - m_InBitStream.SetStream(inStream); - m_InBitStream.InitMain(m_ReservedSize, m_NumInDataBlocks); - CCoderReleaser coderReleaser(this); - - UInt64 nowPos = 0; - while(nowPos < size) - { - if (progress != NULL) - { - UInt64 packSize = m_InBitStream.GetProcessedSize(); - RINOK(progress->SetRatioInfo(&packSize, &nowPos)); - } - UInt32 uncompressedCFDataBlockSize; - bool dataAreCorrect; - RINOK(m_InBitStream.ReadBlock(uncompressedCFDataBlockSize, dataAreCorrect)); - if (!dataAreCorrect) - { - throw "Data Error"; - } - m_InBitStream.Init(); - if (m_InBitStream.ReadBits(8) != 0x43) - throw CDecoderException(CDecoderException::kData); - if (m_InBitStream.ReadBits(8) != 0x4B) - throw CDecoderException(CDecoderException::kData); - UInt32 uncompressedCFDataCurrentValue = 0; - m_FinalBlock = false; - while (uncompressedCFDataCurrentValue < uncompressedCFDataBlockSize) - { - ReadTables(); - if(m_StoredMode) - { - for (UInt32 i = 0; i < m_StoredBlockSize; i++) - m_OutWindowStream.PutByte(Byte(m_InBitStream.ReadBits(8))); - nowPos += m_StoredBlockSize; - uncompressedCFDataCurrentValue += m_StoredBlockSize; - continue; - } - while(true) - { - UInt32 number = m_MainDecoder.DecodeSymbol(&m_InBitStream); - - if (number < 256) - { - m_OutWindowStream.PutByte(Byte(number)); - nowPos++; - uncompressedCFDataCurrentValue++; - continue; - } - else if (number >= kMatchNumber) - { - number -= kMatchNumber; - UInt32 length = UInt32(kLenStart[number]) + kMatchMinLen; - UInt32 numBits; - if ((numBits = kLenDirectBits[number]) > 0) - length += m_InBitStream.ReadBits(numBits); - - number = m_DistDecoder.DecodeSymbol(&m_InBitStream); - UInt32 distance = kDistStart[number] + m_InBitStream.ReadBits(kDistDirectBits[number]); - /* - if (distance >= nowPos) - throw "data error"; - */ - m_OutWindowStream.CopyBlock(distance, length); - nowPos += length; - uncompressedCFDataCurrentValue += length; - } - else if (number == kReadTableNumber) - { - break; - } - else - throw CDecoderException(CDecoderException::kData); - } - } - } - return S_OK; -} - -}}} |