AdvUtils.Security.Cryptography.MD5.HashCore C# (CSharp) Method

        private void HashCore(byte[] rgb, int start, int size)
        {
            int i;
            if (_ProcessingBufferCount != 0)
            {
                if (size < (BLOCK_SIZE_BYTES - _ProcessingBufferCount))
                {
                    System.Buffer.BlockCopy(rgb, start, _ProcessingBuffer, _ProcessingBufferCount, size);
                    _ProcessingBufferCount += size;
                    return;
                }
                else
                {
                    i = (BLOCK_SIZE_BYTES - _ProcessingBufferCount);
                    System.Buffer.BlockCopy(rgb, start, _ProcessingBuffer, _ProcessingBufferCount, i);
                    ProcessBlock(_ProcessingBuffer, 0);
                    _ProcessingBufferCount = 0;
                    start += i;
                    size -= i;
                }
            }

            for (i = 0; i < size - size % BLOCK_SIZE_BYTES; i += BLOCK_SIZE_BYTES)
            {
                ProcessBlock(rgb, start + i);
            }

            if (size % BLOCK_SIZE_BYTES != 0)
            {
                System.Buffer.BlockCopy(rgb, size - size % BLOCK_SIZE_BYTES + start, _ProcessingBuffer, 0, size % BLOCK_SIZE_BYTES);
                _ProcessingBufferCount = size % BLOCK_SIZE_BYTES;
            }
        }