DecodeByte()

static byte System.Guid.DecodeByte ( nuint ch1, nuint ch2, ref int invalidIfNegative )

inlinestaticprivate

Definition at line 568 of file Guid.cs.

    {
        ReadOnlySpan<byte> charToHexLookup = HexConverter.CharToHexLookup;
        int num = -1;
        if (ch1 < (nuint)charToHexLookup.Length)
        {
            num = (sbyte)Unsafe.Add(ref MemoryMarshal.GetReference(charToHexLookup), (nint)ch1);
        }
        num <<= 4;
        int num2 = -1;
        if (ch2 < (nuint)charToHexLookup.Length)
        {
            num2 = (sbyte)Unsafe.Add(ref MemoryMarshal.GetReference(charToHexLookup), (nint)ch2);
        }
        int num3 = num | num2;
        invalidIfNegative |= num3;
        return (byte)num3;
    }

References System.HexConverter.CharToHexLookup, and System.ReadOnlySpan< T >.Length.

Referenced by System.Guid.TryParseExactD(), and System.Guid.TryParseExactN().