7zencode.cpp

来自「由7-zip提供的压缩、解压缩程序」· C++ 代码 · 共 613 行 · 第 1/2 页

      }
      RINOK(cryptoSetPassword->CryptoSetPassword((const Byte *)buffer, sizeInBytes));
    }

    if (methodFull.IsSimpleCoder())
      _mixerCoderSpec->AddCoder(encoder);
    else
      _mixerCoderSpec->AddCoder2(encoder2);
  }
  return S_OK;
}

HRESULT CEncoder::Encode(ISequentialInStream *inStream,
    const UInt64 *inStreamSize, const UInt64 *inSizeForReduce,
    CFolder &folderItem,
    ISequentialOutStream *outStream,
    CRecordVector<UInt64> &packSizes,
    ICompressProgressInfo *compressProgress)
{
  if (_mixerCoderSpec == NULL)
  {
    RINOK(CreateMixerCoder(inSizeForReduce));
  }
  _mixerCoderSpec->ReInit();
  // _mixerCoderSpec->SetCoderInfo(0, NULL, NULL, progress);

  CObjectVector<CInOutTempBuffer> inOutTempBuffers;
  CObjectVector<CSequentialOutTempBufferImp *> tempBufferSpecs;
  CObjectVector<CMyComPtr<ISequentialOutStream> > tempBuffers;
  int numMethods = _bindInfo.Coders.Size();
  int i;
  for (i = 1; i < _bindInfo.OutStreams.Size(); i++)
  {
    inOutTempBuffers.Add(CInOutTempBuffer());
    inOutTempBuffers.Back().Create();
    inOutTempBuffers.Back().InitWriting();
  }
  for (i = 1; i < _bindInfo.OutStreams.Size(); i++)
  {
    CSequentialOutTempBufferImp *tempBufferSpec = 
        new CSequentialOutTempBufferImp;
    CMyComPtr<ISequentialOutStream> tempBuffer = tempBufferSpec;
    tempBufferSpec->Init(&inOutTempBuffers[i - 1]);
    tempBuffers.Add(tempBuffer);
    tempBufferSpecs.Add(tempBufferSpec);
  }

  for (i = 0; i < numMethods; i++)
    _mixerCoderSpec->SetCoderInfo(i, NULL, NULL);

  if (_bindInfo.InStreams.IsEmpty())
    return E_FAIL;
  UInt32 mainCoderIndex, mainStreamIndex;
  _bindInfo.FindInStream(_bindInfo.InStreams[0], mainCoderIndex, mainStreamIndex);
  _mixerCoderSpec->SetProgressCoderIndex(mainCoderIndex);
  if (inStreamSize != NULL)
  {
    CRecordVector<const UInt64 *> sizePointers;
    for (UInt32 i = 0; i < _bindInfo.Coders[mainCoderIndex].NumInStreams; i++)
      if (i == mainStreamIndex)
        sizePointers.Add(inStreamSize);
      else
        sizePointers.Add(NULL);
    _mixerCoderSpec->SetCoderInfo(mainCoderIndex, &sizePointers.Front(), NULL);
  }

  
  // UInt64 outStreamStartPos;
  // RINOK(stream->Seek(0, STREAM_SEEK_CUR, &outStreamStartPos));
  
  CSequentialInStreamSizeCount2 *inStreamSizeCountSpec = 
      new CSequentialInStreamSizeCount2;
  CMyComPtr<ISequentialInStream> inStreamSizeCount = inStreamSizeCountSpec;
  CSequentialOutStreamSizeCount *outStreamSizeCountSpec = 
      new CSequentialOutStreamSizeCount;
  CMyComPtr<ISequentialOutStream> outStreamSizeCount = outStreamSizeCountSpec;

  inStreamSizeCountSpec->Init(inStream);
  outStreamSizeCountSpec->Init(outStream);

  CRecordVector<ISequentialInStream *> inStreamPointers;
  CRecordVector<ISequentialOutStream *> outStreamPointers;
  inStreamPointers.Add(inStreamSizeCount);
  outStreamPointers.Add(outStreamSizeCount);
  for (i = 1; i < _bindInfo.OutStreams.Size(); i++)
    outStreamPointers.Add(tempBuffers[i - 1]);
  
  RINOK(_mixerCoder->Code(&inStreamPointers.Front(), NULL, 1,
    &outStreamPointers.Front(), NULL, outStreamPointers.Size(), compressProgress));
  
  ConvertBindInfoToFolderItemInfo(_decompressBindInfo, _decompressionMethods,
      folderItem);
  
  packSizes.Add(outStreamSizeCountSpec->GetSize());
  
  for (i = 1; i < _bindInfo.OutStreams.Size(); i++)
  {
    CInOutTempBuffer &inOutTempBuffer = inOutTempBuffers[i - 1];
    inOutTempBuffer.FlushWrite();
    inOutTempBuffer.InitReading();
    inOutTempBuffer.WriteToStream(outStream);
    packSizes.Add(inOutTempBuffer.GetDataSize());
  }
  
  for (i = 0; i < (int)_bindReverseConverter->NumSrcInStreams; i++)
  {
    int binder = _bindInfo.FindBinderForInStream(
        _bindReverseConverter->DestOutToSrcInMap[i]);
    UInt64 streamSize;
    if (binder < 0)
      streamSize = inStreamSizeCountSpec->GetSize();
    else
      streamSize = _mixerCoderSpec->GetWriteProcessedSize(binder);
    folderItem.UnPackSizes.Add(streamSize);
  }
  for (i = numMethods - 1; i >= 0; i--)
  {
    // folderItem.Coders[numMethods - 1 - i].Properties = _codersInfo[i].Properties;
    for (int j = 0; j < _codersInfo[i].AltCoders.Size(); j++)
      folderItem.Coders[numMethods - 1 - i].AltCoders[j].Properties 
          = _codersInfo[i].AltCoders[j].Properties;
  }
  return S_OK;
}


CEncoder::CEncoder(const CCompressionMethodMode &options):
  _bindReverseConverter(0)
{
  if (options.IsEmpty())
    throw 1;

  _options = options;
  _mixerCoderSpec = NULL;

  if (options.Methods.IsEmpty())
  {
    // it has only password method;
    if (!options.PasswordIsDefined)
      throw 1;
    if (!options.Binds.IsEmpty())
      throw 1;
    NCoderMixer2::CCoderStreamsInfo coderStreamsInfo;
    CMethodFull method;
    
    method.NumInStreams = 1;
    method.NumOutStreams = 1;
    coderStreamsInfo.NumInStreams = method.NumOutStreams;
    coderStreamsInfo.NumOutStreams = method.NumInStreams;
    method.MethodID = k_AES;

    
    #ifndef EXCLUDE_COM
    CMethodInfo2 methodInfo;
    if (!GetMethodInfo(kCryproMethod, methodInfo)) 
      throw 2;
    method.FilePath = methodInfo.FilePath;
    method.EncoderClassID = methodInfo.Encoder;
    // method.EncoderClassID = CLSID_CCrypto7zAESEncoder;
    #endif
    
    _options.Methods.Add(method);
    _bindInfo.Coders.Add(coderStreamsInfo);
  
    _bindInfo.InStreams.Add(0);
    _bindInfo.OutStreams.Add(0);
  }
  else
  {

  UInt32 numInStreams = 0, numOutStreams = 0;
  int i;
  for (i = 0; i < options.Methods.Size(); i++)
  {
    const CMethodFull &methodFull = options.Methods[i];
    NCoderMixer2::CCoderStreamsInfo coderStreamsInfo;
    coderStreamsInfo.NumInStreams = methodFull.NumOutStreams;
    coderStreamsInfo.NumOutStreams = methodFull.NumInStreams;
    if (options.Binds.IsEmpty())
    {
      if (i < options.Methods.Size() - 1)
      {
        NCoderMixer2::CBindPair bindPair;
        bindPair.InIndex = numInStreams + coderStreamsInfo.NumInStreams;
        bindPair.OutIndex = numOutStreams;
        _bindInfo.BindPairs.Add(bindPair);
      }
      else
        _bindInfo.OutStreams.Insert(0, numOutStreams);
      for (UInt32 j = 1; j < coderStreamsInfo.NumOutStreams; j++)
        _bindInfo.OutStreams.Add(numOutStreams + j);
    }
    
    numInStreams += coderStreamsInfo.NumInStreams;
    numOutStreams += coderStreamsInfo.NumOutStreams;

    _bindInfo.Coders.Add(coderStreamsInfo);
  }

  if (!options.Binds.IsEmpty())
  {
    for (i = 0; i < options.Binds.Size(); i++)
    {
      NCoderMixer2::CBindPair bindPair;
      const CBind &bind = options.Binds[i];
      bindPair.InIndex = _bindInfo.GetCoderInStreamIndex(bind.InCoder) + bind.InStream;
      bindPair.OutIndex = _bindInfo.GetCoderOutStreamIndex(bind.OutCoder) + bind.OutStream;
      _bindInfo.BindPairs.Add(bindPair);
    }
    for (i = 0; i < (int)numOutStreams; i++)
      if (_bindInfo.FindBinderForOutStream(i) == -1)
        _bindInfo.OutStreams.Add(i);
  }

  for (i = 0; i < (int)numInStreams; i++)
    if (_bindInfo.FindBinderForInStream(i) == -1)
      _bindInfo.InStreams.Add(i);

  if (_bindInfo.InStreams.IsEmpty())
    throw 1; // this is error

  // Make main stream first in list
  int inIndex = _bindInfo.InStreams[0];
  while (true)
  {
    UInt32 coderIndex, coderStreamIndex;
    _bindInfo.FindInStream(inIndex, coderIndex, coderStreamIndex);
    UInt32 outIndex = _bindInfo.GetCoderOutStreamIndex(coderIndex);
    int binder = _bindInfo.FindBinderForOutStream(outIndex);
    if (binder >= 0)
    {
      inIndex = _bindInfo.BindPairs[binder].InIndex;
      continue;
    }
    for (i = 0; i < _bindInfo.OutStreams.Size(); i++)
      if (_bindInfo.OutStreams[i] == outIndex)
      {
        _bindInfo.OutStreams.Delete(i);
        _bindInfo.OutStreams.Insert(0, outIndex);
        break;
      }
    break;
  }

  if (_options.PasswordIsDefined)
  {
    int numCryptoStreams = _bindInfo.OutStreams.Size();

    for (i = 0; i < numCryptoStreams; i++)
    {
      NCoderMixer2::CBindPair bindPair;
      bindPair.InIndex = numInStreams + i;
      bindPair.OutIndex = _bindInfo.OutStreams[i];
      _bindInfo.BindPairs.Add(bindPair);
    }
    _bindInfo.OutStreams.Clear();

    /*
    if (numCryptoStreams == 0)
      numCryptoStreams = 1;
    */

    for (i = 0; i < numCryptoStreams; i++)
    {
      NCoderMixer2::CCoderStreamsInfo coderStreamsInfo;
      CMethodFull method;
      method.NumInStreams = 1;
      method.NumOutStreams = 1;
      coderStreamsInfo.NumInStreams = method.NumOutStreams;
      coderStreamsInfo.NumOutStreams = method.NumInStreams;
      method.MethodID = k_AES;

      #ifndef EXCLUDE_COM
      CMethodInfo2 methodInfo;
      if (!GetMethodInfo(kCryproMethod, methodInfo)) 
        throw 2;
      method.FilePath = methodInfo.FilePath;
      method.EncoderClassID = methodInfo.Encoder;
      // method.EncoderClassID = CLSID_CCrypto7zAESEncoder;
      #endif

      _options.Methods.Add(method);
      _bindInfo.Coders.Add(coderStreamsInfo);
      _bindInfo.OutStreams.Add(numOutStreams + i);
    }
  }

  }

  for (int i = _options.Methods.Size() - 1; i >= 0; i--)
  {
    const CMethodFull &methodFull = _options.Methods[i];
    _decompressionMethods.Add(methodFull.MethodID);
  }

  _bindReverseConverter = new NCoderMixer2::CBindReverseConverter(_bindInfo);
  _bindReverseConverter->CreateReverseBindInfo(_decompressBindInfo);
}

CEncoder::~CEncoder()
{
  delete _bindReverseConverter;
}

}}