public Lz4FrameInfo(byte flags)
{
int version = flags >> 6;
if (version != 1)
{
throw Lz4Compressor.InvalidData();
}
IndependentBlocks = 0 != (flags & 0x20);
HasBlockChecksum = 0 != (flags & 0x10);
HasContentLength = 0 != (flags & 8);
HasContentChecksum = 0 != (flags & 4);
HasDictionary = 0 != (flags & 1);
}
void ReadNextBlock()
{
if (4 != BaseStream.Read(m_block_header, 0, 4))
{
throw new EndOfStreamException();
}
int block_size = LittleEndian.ToInt32(m_block_header, 0);
if (0 == block_size)
{
m_eof = true;
m_data_size = 0;
if (m_info.HasContentChecksum)
{
ReadChecksum();
}
}
else if (block_size < 0)
{
m_data_size = block_size & 0x7FFFFFFF;
if (m_data_size > m_data.Length)
{
m_data = new byte[m_data_size];
}
m_data_size = BaseStream.Read(m_data, 0, m_data_size);
if (m_info.HasBlockChecksum)
{
ReadChecksum();
}
}
else
{
m_block_size = block_size;
if (null == m_block || m_block_size > m_block.Length)
{
m_block = new byte[m_block_size];
}
if (m_block_size != BaseStream.Read(m_block, 0, m_block_size))
{
throw new EndOfStreamException();
}
m_data_size = Lz4Compressor.DecompressBlock(m_block, m_block_size, m_data, m_data.Length);
if (m_info.HasBlockChecksum)
{
ReadChecksum();
}
}
m_data_pos = 0;
}
public void SetBlockSize(int code)
{
switch ((code >> 4) & 7)
{
case 4: BlockSize = 0x10000; break;
case 5: BlockSize = 0x40000; break;
case 6: BlockSize = 0x100000; break;
case 7: BlockSize = 0x400000; break;
default: throw Lz4Compressor.InvalidData();
}
}