static unsafe UIntPtr CompressCallback(IntPtr context, Native.ENetBuffer *inBuffers, UIntPtr inBufferCount, UIntPtr inLimit, IntPtr outData, UIntPtr outLimit)
{
if (context == IntPtr.Zero || inBufferCount == UIntPtr.Zero || inLimit == UIntPtr.Zero)
{
return(UIntPtr.Zero);
}
var handle = GCHandle.FromIntPtr(context);
var compressor = handle.Target as ENetCompressor;
byte[] input = null;
compressor.BeginCompress();
for (int i = 0; i < inBufferCount.ToUInt32(); i++)
{
var inBuffer = inBuffers[i];
var count = (int)inBuffer.DataLength.ToUInt32();
if (input == null)
{
input = ByteArrayPool.Shared.Rent(count);
}
else if (input.Length < count)
{
ByteArrayPool.Shared.Return(input);
input = ByteArrayPool.Shared.Rent(count);
}
fixed(byte *dest = input)
{
Platform.Current.MemoryCopy((IntPtr)dest, inBuffer.Data, inBuffer.DataLength);
}
compressor.Compress(input, count);
}
if (input != null)
{
ByteArrayPool.Shared.Return(input);
}
var result = compressor.EndCompress();
if (result.Length > outLimit.ToUInt32())
{
return(UIntPtr.Zero);
}
var resultLen = (UIntPtr)result.Length;
fixed(byte *src = result)
{
Platform.Current.MemoryCopy(outData, (IntPtr)src, resultLen);
}
return(resultLen);
}
private uint ChecksumCallback(Native.ENetBuffer *buffers, UIntPtr buffersCount)
{
Checksum.Begin();
byte[] input = null;
for (int i = 0; i < buffersCount.ToUInt32(); i++)
{
var buffer = buffers[i];
if (Checksum.Method == ENetChecksum.ChecksumMethod.Pointer)
{
Checksum.Sum((byte *)buffer.Data, (int)buffer.DataLength);
continue;
}
if (Checksum.Method == ENetChecksum.ChecksumMethod.Array)
{
var count = (int)buffer.DataLength.ToUInt32();
if (input == null)
{
input = ByteArrayPool.Shared.Rent(count);
}
else if (input.Length < count)
{
ByteArrayPool.Shared.Return(input);
input = ByteArrayPool.Shared.Rent(count);
}
fixed(byte *dest = input)
{
Platform.Current.MemoryCopy((IntPtr)dest, buffer.Data, buffer.DataLength);
}
Checksum.Sum(input, count);
continue;
}
throw new NotImplementedException(Checksum.Method.ToString());
}
if (input != null)
{
ByteArrayPool.Shared.Return(input);
}
return(Checksum.End());
}
