public override int Read(byte[] buffer, int offset, int count)
{
if (m_mode == Compress)
{
int r = 0;
while (m_queue.Count < count && (r = m_io.Read(m_bytesReadFromStream, 0, m_BufferSize)) != 0)
{
byte[] data = new byte[r];
for (int i = 0; i < r; data[i] = m_bytesReadFromStream[i], i++)
{
;
}
byte[] compressed = m_naiveCompressor.compress(data);
foreach (byte b in compressed)
{
m_queue.Enqueue(b);
}
}
int bytesCount = Math.Min(m_queue.Count, count);
for (int i = 0; i < bytesCount; i++)
{
buffer[i + offset] = m_queue.Dequeue();
}
return(-1);
}
else if (m_mode == MyCompressorStream.Decompress)
{
// we should read X < Count compressed bytes form the source stream
// and allow the reader to read COUNT decomprssed bytes from buffer
// starting from OFFSET index
int r = 0;
while (m_queue.Count < count && (r = m_io.Read(m_bytesReadFromStream, 0, m_BufferSize)) != 0)
{
// our source actually contain R bytes and if R<bufferSize then the rest of bytes are leftovers...
// let's cut them
byte[] data = new byte[r];
for (int i = 0; i < r; data[i] = m_bytesReadFromStream[i], i++)
{
;
}
byte[] decompressed = m_naiveCompressor.decompress(data);
// now, we'll put the decomprssed data in the queue; it is used as a buffer
foreach (byte b in decompressed)
{
m_queue.Enqueue(b);
}
}
int bytesCount = Math.Min(m_queue.Count, count);
for (int i = 0; i < bytesCount; i++)
{
buffer[i + offset] = m_queue.Dequeue();
}
return(bytesCount);
}
return(0);
}
/// <summary>
/// Read compressed data from a file, decompress it and writes it into the buffer
/// </summary>
/// <param name="buffer">buffer for decompressed data</param>
/// <param name="offset">start to insert data into the 'buffer' from this position</param>
/// <param name="count">number of bytes to read</param>
/// <returns>number of bytes that actually readed </returns>
public override int Read(byte[] buffer, int offset, int count)
{
int r = 0;
while (m_queue.Count < count && (r = m_io.Read(m_bytesReadFromStream, 0, m_BufferSize)) != 0)
{
// our source actually contain R bytes and if R<bufferSize then the rest of bytes are leftovers...
// let's cut them
byte[] data = new byte[r];
for (int i = 0; i < r; data[i] = m_bytesReadFromStream[i], i++)
{
;
}
byte[] decompressed = m_naiveCompressor.decompress(data);
// now, we'll put the decomprssed data in the queue; it is used as a buffer
foreach (byte b in decompressed)
{
m_queue.Enqueue(b);
}
}
int bytesCount = Math.Min(m_queue.Count, count);
for (int i = 0; i < bytesCount; i++)
{
buffer[i + offset] = m_queue.Dequeue();
}
return(bytesCount);
}
/// <summary>
/// read an array of bytes and
/// </summary>
/// <param name="buffer"></param>
/// <param name="offset"></param>
/// <param name="count"></param>
/// <returns>bytesCountreturns>
public override int Read(byte[] buffer, int offset, int count)
{
if (m_mode != m_compress && m_mode != m_decompress)
{
return(0);
}
int r = 0;
while (m_queue.Count < count && (r = m_io.Read(m_bytesReadFromStream, 0, m_BufferSize)) != 0)
{
byte[] data = new byte[r];
for (int i = 0; i < r; data[i] = m_bytesReadFromStream[i], i++)
{
;
}
if (m_mode == MyCompressorStream.m_decompress)
{
byte[] decompressed = mazeCompressor.decompress(data);
foreach (byte b in decompressed)
{
m_queue.Enqueue(b);
}
}
else if (m_mode == MyCompressorStream.m_compress)
{
byte[] compressed = mazeCompressor.compress(data);
foreach (byte b in compressed)
{
m_queue.Enqueue(b);
}
}
}
int bytesCount = Math.Min(m_queue.Count, count);
for (int i = 0; i < bytesCount; i++)
{
buffer[i + offset] = m_queue.Dequeue();
}
return(bytesCount);
}
