105 lines
2.0 KiB
C#
105 lines
2.0 KiB
C#
using System;
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using System.Runtime.InteropServices;
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using System.Runtime.Serialization;
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namespace ProtoBuf;
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[Serializable]
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[StructLayout(LayoutKind.Explicit)]
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public readonly struct DiscriminatedUnion32 : ISerializable
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{
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[FieldOffset(0)]
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private readonly int _discriminator;
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[FieldOffset(4)]
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public readonly int Int32;
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[FieldOffset(4)]
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public readonly uint UInt32;
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[FieldOffset(4)]
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public readonly bool Boolean;
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[FieldOffset(4)]
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public readonly float Single;
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public int Discriminator => _discriminator;
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private DiscriminatedUnion32(int discriminator)
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{
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this = default(DiscriminatedUnion32);
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_discriminator = discriminator;
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}
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public bool Is(int discriminator)
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{
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return _discriminator == discriminator;
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}
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public DiscriminatedUnion32(int discriminator, int value)
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: this(discriminator)
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{
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Int32 = value;
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}
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public DiscriminatedUnion32(int discriminator, uint value)
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: this(discriminator)
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{
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UInt32 = value;
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}
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public DiscriminatedUnion32(int discriminator, float value)
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: this(discriminator)
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{
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Single = value;
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}
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public DiscriminatedUnion32(int discriminator, bool value)
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: this(discriminator)
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{
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Boolean = value;
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}
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public static void Reset(ref DiscriminatedUnion32 value, int discriminator)
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{
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if (value.Discriminator == discriminator)
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{
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value = default(DiscriminatedUnion32);
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}
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}
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void ISerializable.GetObjectData(SerializationInfo info, StreamingContext context)
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{
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if (_discriminator != 0)
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{
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info.AddValue("d", _discriminator);
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}
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if (Int32 != 0)
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{
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info.AddValue("i", Int32);
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}
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}
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private DiscriminatedUnion32(SerializationInfo info, StreamingContext context)
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{
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this = default(DiscriminatedUnion32);
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SerializationInfoEnumerator enumerator = info.GetEnumerator();
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while (enumerator.MoveNext())
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{
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SerializationEntry current = enumerator.Current;
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string name = current.Name;
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if (!(name == "d"))
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{
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if (name == "i")
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{
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Int32 = (int)current.Value;
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}
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}
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else
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{
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_discriminator = (int)current.Value;
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}
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}
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}
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}
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