C++ COutBuffer::Init方法代码示例

本文整理汇总了C++中COutBuffer::Init方法的典型用法代码示例。如果您正苦于以下问题：C++ COutBuffer::Init方法的具体用法？C++ COutBuffer::Init怎么用？C++ COutBuffer::Init使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类COutBuffer的用法示例。

在下文中一共展示了COutBuffer::Init方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: CodeReal

STDMETHODIMP CDecoder::CodeReal(ISequentialInStream *inStream,
    ISequentialOutStream *outStream, const UInt64 * /* inSize */, const UInt64 * /* outSize */,
    ICompressProgressInfo *progress)
{
  NStream::NLSBF::CBaseDecoder<CInBuffer> inBuffer;
  COutBuffer outBuffer;

  if (!inBuffer.Create(kBufferSize))
    return E_OUTOFMEMORY;
  inBuffer.SetStream(inStream);
  inBuffer.Init();

  if (!outBuffer.Create(kBufferSize))
    return E_OUTOFMEMORY;
  outBuffer.SetStream(outStream);
  outBuffer.Init();

  int maxbits = _properties & kNumBitsMask;
  if (maxbits < kNumMinBits || maxbits > kNumMaxBits)
    return S_FALSE;
  UInt32 numItems = 1 << maxbits;
  bool blockMode = ((_properties & kBlockModeMask) != 0);
  if (!blockMode)
    return E_NOTIMPL;

  if (maxbits != _numMaxBits || _parents == 0 || _suffixes == 0 || _stack == 0)
  {
    if (!Alloc(numItems))
      return E_OUTOFMEMORY;
    _numMaxBits = maxbits;
  }

  UInt64 prevPos = 0;
  int numBits = kNumMinBits;
  UInt32 head = blockMode ? 257 : 256;

  bool needPrev = false;

  int keepBits = 0;

  _parents[256] = 0; // virus protection
  _suffixes[256] = 0;

  for (;;)
  {
    if (keepBits < numBits)
      keepBits = numBits * 8;
    UInt32 symbol = inBuffer.ReadBits(numBits);
    if (inBuffer.ExtraBitsWereRead())
      break;
    keepBits -= numBits;
    if (symbol >= head)
      return S_FALSE;
    if (blockMode && symbol == 256)
    {
      for (;keepBits > 0; keepBits--)
        inBuffer.ReadBits(1);
      numBits = kNumMinBits;
      head = 257;
      needPrev = false;
      continue;
    }
    UInt32 cur = symbol;
    int i = 0;
    while (cur >= 256)
    {
      _stack[i++] = _suffixes[cur];
      cur = _parents[cur];
    }
    _stack[i++] = (Byte)cur;
    if (needPrev)
    {
      _suffixes[head - 1] = (Byte)cur;
      if (symbol == head - 1)
        _stack[0] = (Byte)cur;
    }
    while (i > 0)
      outBuffer.WriteByte((_stack[--i]));
    if (head < numItems)
    {
      needPrev = true;
      _parents[head++] = (UInt16)symbol;
      if (head > ((UInt32)1 << numBits))
      {
        if (numBits < maxbits)
        {
          numBits++;
          keepBits = numBits * 8;
        }
      }
    }
    else
      needPrev = false;

    UInt64 nowPos = outBuffer.GetProcessedSize();
    if (progress != NULL && nowPos - prevPos > (1 << 18))
    {
      prevPos = nowPos;
      UInt64 packSize = inBuffer.GetProcessedSize();
      RINOK(progress->SetRatioInfo(&packSize, &nowPos));
//.........这里部分代码省略.........

开发者ID:Ando02，项目名称:wubiuefi，代码行数:101，代码来源:ZDecoder.cpp

示例2: CodeReal

HRESULT CDecoder::CodeReal(ISequentialInStream *inStream, ISequentialOutStream *outStream,
    const UInt64 * /* inSize */, const UInt64 * /* outSize */, ICompressProgressInfo *progress)
{
  NBitl::CBaseDecoder<CInBuffer> inBuffer;
  COutBuffer outBuffer;

  if (!inBuffer.Create(kBufferSize))
    return E_OUTOFMEMORY;
  inBuffer.SetStream(inStream);
  inBuffer.Init();

  if (!outBuffer.Create(kBufferSize))
    return E_OUTOFMEMORY;
  outBuffer.SetStream(outStream);
  outBuffer.Init();

  {
    unsigned i;
    for (i = 0; i < 257; i++)
      _parents[i] = (UInt16)i;
    for (; i < kNumItems; i++)
      _parents[i] = kNumItems;
    for (i = 0; i < kNumItems; i++)
      _suffixes[i] = 0;
  }

  UInt64 prevPos = 0;
  unsigned numBits = kNumMinBits;
  unsigned head = 257;
  int lastSym = -1;
  Byte lastChar2 = 0;

  for (;;)
  {
    UInt32 sym = inBuffer.ReadBits(numBits);
    
    if (inBuffer.ExtraBitsWereRead())
      break;
    
    if (sym == 256)
    {
      sym = inBuffer.ReadBits(numBits);
      if (sym == 1)
      {
        if (numBits >= kNumMaxBits)
          return S_FALSE;
        numBits++;
        continue;
      }
      if (sym != 2)
        return S_FALSE;
      {
        unsigned i;
        for (i = 257; i < kNumItems; i++)
          _stack[i] = 0;
        for (i = 257; i < kNumItems; i++)
        {
          unsigned par = _parents[i];
          if (par != kNumItems)
            _stack[par] = 1;
        }
        for (i = 257; i < kNumItems; i++)
          if (_stack[i] == 0)
            _parents[i] = kNumItems;
       
        head = 257;
       
        continue;
      }
    }

    bool needPrev = false;
    if (head < kNumItems && lastSym >= 0)
    {
      while (head < kNumItems && _parents[head] != kNumItems)
        head++;
      if (head < kNumItems)
      {
        if (head == (unsigned)lastSym)
        {
          // we need to fix the code for that case
          // _parents[head] is not allowed to link to itself
          return E_NOTIMPL;
        }
        needPrev = true;
        _parents[head] = (UInt16)lastSym;
        _suffixes[head] = (Byte)lastChar2;
        head++;
      }
    }

    if (_parents[sym] == kNumItems)
      return S_FALSE;

    lastSym = sym;
    unsigned cur = sym;
    unsigned i = 0;
    
    while (cur >= 256)
    {
//.........这里部分代码省略.........

开发者ID:ming-hai，项目名称:soui，代码行数:101，代码来源:ShrinkDecoder.cpp

示例3: CodeReal

HRESULT CDecoder::CodeReal(ISequentialInStream *inStream, ISequentialOutStream *outStream,
    const UInt64 * /* inSize */, const UInt64 * /* outSize */, ICompressProgressInfo *progress)
{
  NBitl::CBaseDecoder<CInBuffer> inBuffer;
  COutBuffer outBuffer;

  if (!inBuffer.Create(kBufferSize))
    return E_OUTOFMEMORY;
  inBuffer.SetStream(inStream);
  inBuffer.Init();

  if (!outBuffer.Create(kBufferSize))
    return E_OUTOFMEMORY;
  outBuffer.SetStream(outStream);
  outBuffer.Init();

  UInt64 prevPos = 0;
  int numBits = kNumMinBits;
  UInt32 head = 257;
  bool needPrev = false;
  UInt32 lastSymbol = 0;

  int i;
  for (i = 0; i < kNumItems; i++)
    _parents[i] = 0;
  for (i = 0; i < kNumItems; i++)
    _suffixes[i] = 0;
  for (i = 0; i < 257; i++)
    _isFree[i] = false;
  for (; i < kNumItems; i++)
    _isFree[i] = true;

  for (;;)
  {
    UInt32 symbol = inBuffer.ReadBits(numBits);
    if (inBuffer.ExtraBitsWereRead())
      break;
    if (_isFree[symbol])
      return S_FALSE;
    if (symbol == 256)
    {
      UInt32 symbol = inBuffer.ReadBits(numBits);
      if (symbol == 1)
      {
        if (numBits < kNumMaxBits)
          numBits++;
      }
      else if (symbol == 2)
      {
        if (needPrev)
          _isFree[head - 1] = true;
        for (i = 257; i < kNumItems; i++)
          _isParent[i] = false;
        for (i = 257; i < kNumItems; i++)
          if (!_isFree[i])
            _isParent[_parents[i]] = true;
        for (i = 257; i < kNumItems; i++)
          if (!_isParent[i])
            _isFree[i] = true;
        head = 257;
        while (head < kNumItems && !_isFree[head])
          head++;
        if (head < kNumItems)
        {
          needPrev = true;
          _isFree[head] = false;
          _parents[head] = (UInt16)lastSymbol;
          head++;
        }
      }
      else
        return S_FALSE;
      continue;
    }
    UInt32 cur = symbol;
    i = 0;
    int corectionIndex = -1;
    while (cur >= 256)
    {
      if (cur == head - 1)
        corectionIndex = i;
      _stack[i++] = _suffixes[cur];
      cur = _parents[cur];
    }
    _stack[i++] = (Byte)cur;
    if (needPrev)
    {
      _suffixes[head - 1] = (Byte)cur;
      if (corectionIndex >= 0)
        _stack[corectionIndex] = (Byte)cur;
    }
    while (i > 0)
      outBuffer.WriteByte((_stack[--i]));
    while (head < kNumItems && !_isFree[head])
      head++;
    if (head < kNumItems)
    {
      needPrev = true;
      _isFree[head] = false;
      _parents[head] = (UInt16)symbol;
//.........这里部分代码省略.........

开发者ID:Bernieboy，项目名称:nds4ios，代码行数:101，代码来源:ShrinkDecoder.cpp

注：本文中的COutBuffer::Init方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。