Android changes

src/LibKenjinx/Android/Jni/Values/JValue.cs

@@ -0,0 +1,46 @@
+using System;
+using System.Runtime.CompilerServices;
+
+using LibKenjinx.Jni.References;
+
+using Rxmxnx.PInvoke;
+
+namespace LibKenjinx.Jni.Values;
+
+internal readonly struct JValue
+{
+	private delegate Boolean IsDefaultDelegate(in JValue value);
+
+	private static readonly Int32 size = NativeUtilities.SizeOf<JValue>();
+
+	private static readonly IsDefaultDelegate isDefault = JValue.GetIsDefault();
+
+#pragma warning disable 0649
+#pragma warning disable 0169
+	private readonly Byte _value1;
+	private readonly Byte _value2;
+	private readonly Int16 _value3;
+	private readonly Int32 _value4;
+#pragma warning restore 0169
+#pragma warning restore 0649
+
+	public Boolean IsDefault => JValue.isDefault(this);
+
+	public static JValue Create(in ReadOnlySpan<Byte> source)
+	{
+		Byte[] result = new Byte[JValue.size];
+		for (Int32 i = 0; i < source.Length; i++)
+			result[i] = source[i];
+		return result.ToValue<JValue>();
+	}
+
+	private static IsDefaultDelegate GetIsDefault() => Environment.Is64BitProcess ? JValue.DefaultLong : JValue.Default;
+
+	private static Boolean Default(in JValue jValue)
+		=> jValue._value1 + jValue._value2 + jValue._value3 == default && jValue._value4 == default;
+
+	private static Boolean DefaultLong(in JValue jValue)
+		=> Unsafe.AsRef(in jValue).Transform<JValue, Int64>() == default;
+
+	public static explicit operator JValue(JObjectLocalRef a) => JValue.Create(NativeUtilities.AsBytes(in a));
+}