Decode()

static int System.Net.Http.HPack.Huffman.Decode ( ReadOnlySpan< byte > src, ref byte[] dstArray )

inlinestatic

Definition at line 118 of file Huffman.cs.

    {
        Span<byte> span = dstArray;
        ushort[] array = s_decodingTree;
        int num = 0;
        uint num2 = 0u;
        int num3 = 0;
        int num4 = 0;
        int num5 = 0;
        while (num4 < src.Length)
        {
            num2 <<= 8;
            num2 |= src[num4++];
            num3 += 8;
            do
            {
                int num6 = (byte)(num2 >> num3 - 8);
                int num7 = array[(num << 8) + num6];
                if (num7 < 32768)
                {
                    if (num5 == span.Length)
                    {
                        Array.Resize(ref dstArray, span.Length * 2);
                        span = dstArray;
                    }
                    span[num5++] = (byte)num7;
                    num = 0;
                    num3 -= num7 >> 8;
                }
                else
                {
                    num = (num7 & 0x7F00) >> 8;
                    if (num == 0)
                    {
                        throw new HuffmanDecodingException(System.SR.net_http_hpack_huffman_decode_failed);
                    }
                    num3 -= 8;
                }
            }
            while (num3 >= 8);
        }
        while (num3 > 0)
        {
            if (num == 0)
            {
                uint num8 = uint.MaxValue >> 32 - num3;
                if ((num2 & num8) == num8)
                {
                    break;
                }
            }
            int num6 = (byte)(num2 << 8 - num3);
            int num9 = array[(num << 8) + num6];
            if (num9 < 32768)
            {
                num3 -= num9 >> 8;
                if (num3 < 0)
                {
                    throw new HuffmanDecodingException(System.SR.net_http_hpack_huffman_decode_failed);
                }
                if (num5 == span.Length)
                {
                    Array.Resize(ref dstArray, span.Length * 2);
                    span = dstArray;
                }
                span[num5++] = (byte)num9;
                num = 0;
                continue;
            }
            throw new HuffmanDecodingException(System.SR.net_http_hpack_huffman_decode_failed);
        }
        if (num != 0)
        {
            throw new HuffmanDecodingException(System.SR.net_http_hpack_huffman_decode_failed);
        }
        return num5;
    }

References System.array, System.ReadOnlySpan< T >.Length, System.Span< T >.Length, System.SR.net_http_hpack_huffman_decode_failed, and System.Net.Http.HPack.Huffman.s_decodingTree.

Referenced by System.Net.Http.HPack.HPackDecoder.OnString(), and System.Net.Http.QPack.QPackDecoder.OnString().