/// <summary>
/// Decodes the specified region of the buffer into an unadjusted frame length. The default implementation is
/// capable of decoding the specified region into an unsigned 8/16/24/32/64 bit integer. Override this method to
/// decode the length field encoded differently.
/// Note that this method must not modify the state of the specified buffer (e.g. <see cref="IByteBuf.ReaderIndex" />,
/// <see cref="IByteBuf.WriterIndex" />, and the content of the buffer.)
/// </summary>
/// <param name="buffer">The buffer we'll be extracting the frame length from.</param>
/// <param name="offset">The offset from the absolute <see cref="IByteBuf.ReaderIndex" />.</param>
/// <param name="length">The length of the framelenght field. Expected: 1, 2, 3, 4, or 8.</param>
/// <param name="order">The preferred <see cref="ByteOrder" /> of <see cref="buffer" />.</param>
/// <returns>A long integer that represents the unadjusted length of the next frame.</returns>
protected long GetUnadjustedFrameLength(IByteBuf buffer, int offset, int length, ByteOrder order)
{
buffer = buffer.WithOrder(order);
long frameLength;
switch (length)
{
case 1:
frameLength = buffer.GetByte(offset);
break;
case 2:
frameLength = buffer.GetShort(offset);
break;
case 4:
frameLength = buffer.GetInt(offset);
break;
case 8:
frameLength = buffer.GetLong(offset);
break;
default:
throw new DecoderException("unsupported lengthFieldLength: " + lengthFieldLength +
" (expected: 1, 2, 3, 4, or 8)");
}
return(frameLength);
}
protected long GetUnadjustedFrameLength(IByteBuf buf, int offset, int length)
{
long framelength;
switch (length)
{
case 1:
framelength = buf.GetByte(offset);
break;
case 2:
framelength = buf.GetShort(offset);
break;
case 4:
framelength = buf.GetInt(offset);
break;
case 8:
framelength = buf.GetLong(offset);
break;
default:
throw new DecoderException(string.Format("unsupported lengtFieldLength: {0} (expected: 1, 2, 4, or 8)", length));
}
return(framelength);
}
protected override short _GetShort(int index)
{
return(_buffer.GetShort(index));
}
public short GetShort(int index)
{
return(ByteBufferUtil.SwapShort(_buf.GetShort(index)));
}
protected override short _GetShort(int index)
{
return(_buffer.GetShort(index + _adjustment));
}
protected long GetUnadjustedFrameLength(IByteBuf buf, int offset, int length)
{
long framelength;
switch (length)
{
case 1:
framelength = buf.GetByte(offset);
break;
case 2:
framelength = buf.GetShort(offset);
break;
case 4:
framelength = buf.GetInt(offset);
break;
case 8:
framelength = buf.GetLong(offset);
break;
default:
throw new DecoderException(string.Format("unsupported lengtFieldLength: {0} (expected: 1, 2, 4, or 8)", length));
}
return framelength;
}
/// <summary>
/// Decodes the specified region of the buffer into an unadjusted frame length. The default implementation is
/// capable of decoding the specified region into an unsigned 8/16/24/32/64 bit integer. Override this method to
/// decode the length field encoded differently.
/// Note that this method must not modify the state of the specified buffer (e.g. <see cref="IByteBuf.ReaderIndex" />,
/// <see cref="IByteBuf.WriterIndex" />, and the content of the buffer.)
/// </summary>
/// <param name="buffer">The buffer we'll be extracting the frame length from.</param>
/// <param name="offset">The offset from the absolute <see cref="IByteBuf.ReaderIndex" />.</param>
/// <param name="length">The length of the framelenght field. Expected: 1, 2, 3, 4, or 8.</param>
/// <param name="order">The preferred <see cref="ByteOrder" /> of <see cref="buffer" />.</param>
/// <returns>A long integer that represents the unadjusted length of the next frame.</returns>
protected long GetUnadjustedFrameLength(IByteBuf buffer, int offset, int length, ByteOrder order)
{
buffer = buffer.WithOrder(order);
long frameLength;
switch (length)
{
case 1:
frameLength = buffer.GetByte(offset);
break;
case 2:
frameLength = buffer.GetShort(offset);
break;
case 4:
frameLength = buffer.GetInt(offset);
break;
case 8:
frameLength = buffer.GetLong(offset);
break;
default:
throw new DecoderException("unsupported lengthFieldLength: " + lengthFieldLength +
" (expected: 1, 2, 3, 4, or 8)");
}
return frameLength;
}
