/// Initializes a new instance of the <see cref="CustomBufferedStream"/> class.
/// </summary>
/// <param name="baseStream">The base stream.</param>
/// <param name="bufferPool">Bufferpool.</param>
/// <param name="bufferSize">Size of the buffer.</param>
/// <param name="leaveOpen"><see langword="true" /> to leave the stream open after disposing the <see cref="T:CustomBufferedStream" /> object; otherwise, <see langword="false" />.</param>
/// When overridden in a derived class, sets the length of the current stream.
/// </summary>
/// <param name="value">The desired length of the current stream in bytes.</param>
publicoverridevoidSetLength(longvalue)
{
baseStream.SetLength(value);
}
/// <summary>
/// When overridden in a derived class, reads a sequence of bytes from the current stream and advances the position within the stream by the number of bytes read.
/// </summary>
/// <param name="buffer">An array of bytes. When this method returns, the buffer contains the specified byte array with the values between <paramref name="offset" /> and (<paramref name="offset" /> + <paramref name="count" /> - 1) replaced by the bytes read from the current source.</param>
/// <param name="offset">The zero-based byte offset in <paramref name="buffer" /> at which to begin storing the data read from the current stream.</param>
/// <param name="count">The maximum number of bytes to be read from the current stream.</param>
/// <returns>
/// The total number of bytes read into the buffer. This can be less than the number of bytes requested if that many bytes are not currently available, or zero (0) if the end of the stream has been reached.
/// When overridden in a derived class, writes a sequence of bytes to the current stream and advances the current position within this stream by the number of bytes written.
/// </summary>
/// <param name="buffer">An array of bytes. This method copies <paramref name="count" /> bytes from <paramref name="buffer" /> to the current stream.</param>
/// <param name="offset">The zero-based byte offset in <paramref name="buffer" /> at which to begin copying bytes to the current stream.</param>
/// <param name="count">The number of bytes to be written to the current stream.</param>
/// Asynchronously reads the bytes from the current stream and writes them to another stream, using a specified buffer size and cancellation token.
/// </summary>
/// <param name="destination">The stream to which the contents of the current stream will be copied.</param>
/// <param name="bufferSize">The size, in bytes, of the buffer. This value must be greater than zero. The default size is 81920.</param>
/// <param name="cancellationToken">The token to monitor for cancellation requests. The default value is <see cref="P:System.Threading.CancellationToken.None" />.</param>
/// <returns>
/// A task that represents the asynchronous copy operation.
/// Asynchronously clears all buffers for this stream, causes any buffered data to be written to the underlying device, and monitors cancellation requests.
/// </summary>
/// <param name="cancellationToken">The token to monitor for cancellation requests. The default value is <see cref="P:System.Threading.CancellationToken.None" />.</param>
/// <returns>
/// A task that represents the asynchronous flush operation.
thrownewException("Requested Peek index and size exceeds the buffer size. Consider increasing the buffer size.");
}
if(Available<=(index+size))
{
returnnull;
}
varvRet=newbyte[size];
Array.Copy(streamBuffer,index,vRet,0,size);
returnvRet;
}
/// <summary>
/// Peeks a byte from buffer.
/// </summary>
/// <param name="index">The index.</param>
/// <returns></returns>
/// <exception cref="Exception">Index is out of buffer size</exception>
publicbytePeekByteFromBuffer(intindex)
{
if(bufferLength<=index)
{
thrownewException("Index is out of buffer size");
}
returnstreamBuffer[bufferPos+index];
}
/// <summary>
/// Reads a byte from buffer.
/// </summary>
/// <returns></returns>
/// <exception cref="Exception">Buffer is empty</exception>
publicbyteReadByteFromBuffer()
{
if(bufferLength==0)
{
thrownewException("Buffer is empty");
}
bufferLength--;
returnstreamBuffer[bufferPos++];
}
/// <summary>
/// Asynchronously writes a sequence of bytes to the current stream, advances the current position within this stream by the number of bytes written, and monitors cancellation requests.
/// </summary>
/// <param name="buffer">The buffer to write data from.</param>
/// <param name="offset">The zero-based byte offset in <paramref name="buffer" /> from which to begin copying bytes to the stream.</param>
/// <param name="count">The maximum number of bytes to write.</param>
/// <param name="cancellationToken">The token to monitor for cancellation requests. The default value is <see cref="P:System.Threading.CancellationToken.None" />.</param>
/// <returns>
/// A task that represents the asynchronous write operation.
/// When overridden in a derived class, reads a sequence of bytes from the current stream and advances the position within the stream by the number of bytes read.
/// </summary>
/// <param name="buffer">An array of bytes. When this method returns, the buffer contains the specified byte array with the values between <paramref name="offset" /> and (<paramref name="offset" /> + <paramref name="count" /> - 1) replaced by the bytes read from the current source.</param>
/// <param name="offset">The zero-based byte offset in <paramref name="buffer" /> at which to begin storing the data read from the current stream.</param>
/// <param name="count">The maximum number of bytes to be read from the current stream.</param>
/// <returns>
/// The total number of bytes read into the buffer. This can be less than the number of bytes requested if that many bytes are not currently available, or zero (0) if the end of the stream has been reached.
/// </returns>
intRead(byte[]buffer,intoffset,intcount);
/// <summary>
/// Read the specified number (or less) of raw bytes from the base stream to the given buffer to the specified offset