Method Read

Libraries/unrar/rawread.cpp:26–63

size_t RawRead::Read(size_t Size)
{
  size_t ReadSize=0;
#if !defined(RAR_NOCRYPT)
  if (Crypt!=NULL)
  {
    // Full size of buffer with already read data including data read 
    // for encryption block alignment.
    size_t FullSize=Data.Size();

    // Data read for alignment and not processed yet.
    size_t DataLeft=FullSize-DataSize;

    if (Size>DataLeft) // Need to read more than we already have.
    {
      size_t SizeToRead=Size-DataLeft;
      size_t AlignedReadSize=SizeToRead+((~SizeToRead+1) & CRYPT_BLOCK_MASK);
      Data.Add(AlignedReadSize);
      ReadSize=SrcFile->Read(&Data[FullSize],AlignedReadSize);
      Crypt->DecryptBlock(&Data[FullSize],AlignedReadSize);
      DataSize+=ReadSize==0 ? 0:Size;
    }
    else // Use buffered data, no real read.
    {
      ReadSize=Size;
      DataSize+=Size;
    }
  }
  else
#endif
    if (Size!=0)
    {
      Data.Add(Size);
      ReadSize=SrcFile->Read(&Data[DataSize],Size);
      DataSize+=ReadSize;
    }
  return ReadSize;
}


void RawRead::Read(byte *SrcData,size_t Size)