Amazon.Runtime.Internal.Util.ChunkedUploadWrapperStream.FillInputBuffer C# (CSharp) Метод

        private int FillInputBuffer()
        {
            if (_wrappedStreamConsumed)
                return 0;

            var inputBufferPos = 0;

            if (_readStrategy == ReadStrategy.ReadDirect)
            {
                while (inputBufferPos < _inputBuffer.Length && !_wrappedStreamConsumed)
                {
                    // chunk buffer size may not align exactly with underlying buffer size
                    var chunkBufferRemaining = _inputBuffer.Length - inputBufferPos;
                    if (chunkBufferRemaining > _wrappedStreamBufferSize)
                        chunkBufferRemaining = _wrappedStreamBufferSize;

                    var bytesRead = BaseStream.Read(_inputBuffer, inputBufferPos, chunkBufferRemaining);
                    if (bytesRead == 0)
                        _wrappedStreamConsumed = true;
                    else
                        inputBufferPos += bytesRead;
                }
            }
            else
            {
                var readBuffer = new byte[_wrappedStreamBufferSize];
                while (inputBufferPos < _inputBuffer.Length && !_wrappedStreamConsumed)
                {
                    var bytesRead = BaseStream.Read(readBuffer, 0, _wrappedStreamBufferSize);
                    if (bytesRead == 0)
                        _wrappedStreamConsumed = true;
                    else
                    {
                        Buffer.BlockCopy(readBuffer, 0, _inputBuffer, inputBufferPos, bytesRead);
                        inputBufferPos += bytesRead;
                    }
                }
            }

            return inputBufferPos;
        }
    }