using System.Runtime.CompilerServices; namespace System.Text.Encodings.Web { internal struct AsciiByteMap { private unsafe fixed byte Buffer[128]; internal unsafe void InsertAsciiChar(char key, byte value) { if (key < '€') *(sbyte*)(ref *Buffer + key) = (sbyte)value; } [MethodImpl(MethodImplOptions.AggressiveInlining)] [IsReadOnly] internal unsafe bool TryLookup(Rune key, out byte value) { if (key.IsAscii) { byte b = *(byte*)(ref *Buffer + (uint)key.Value); if (b != 0) { value = b; return true; } } value = 0; return false; } } }