Bump version

Bumps [Microsoft.NET.Test.Sdk](https://github.com/microsoft/vstest) from 17.8.0 to 17.9.0.
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Changelog](https://github.com/microsoft/vstest/blob/main/docs/releases.md)
- [Commits](https://github.com/microsoft/vstest/compare/v17.8.0...v17.9.0)

---
updated-dependencies:
- dependency-name: Microsoft.NET.Test.Sdk
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/dependabot.yml

@@ -0,0 +1,18 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://help.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  - package-ecosystem: "nuget" # See documentation for possible values
+    directory: "/" # Location of package manifests
+    schedule:
+      interval: "daily"
+
+  - package-ecosystem: "github-actions"
+    # Workflow files stored in the
+    # default location of `.github/workflows`
+    directory: "/"
+    schedule:
+      interval: "daily"

.github/workflows/dotnet.yml

@@ -0,0 +1,61 @@
+name: .NET
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  net7:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Setup .NET
+      uses: actions/[email protected]
+      with:
+        dotnet-version: 7.0.x
+    - name: Restore dependencies
+      run: dotnet restore
+    - name: Build
+      run: dotnet build --framework net7.0 --no-restore
+    - name: Test
+      run: dotnet test --framework net7.0 --no-build --verbosity normal
+
+  net6:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Setup .NET
+      uses: actions/[email protected]
+      with:
+        dotnet-version: 6.0.x
+    - name: Restore dependencies
+      run: dotnet restore
+    - name: Build
+      run: dotnet build --framework net6.0 --no-restore
+    - name: Test
+      run: dotnet test --framework net6.0 --no-build --verbosity normal
+
+  net5:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Setup .NET
+      uses: actions/[email protected]
+      with:
+        dotnet-version: | 
+            5.0.x
+            6.0.x
+    - name: Restore dependencies
+      run: dotnet restore
+    - name: Build
+      run: dotnet build --framework net5.0 --no-restore
+    - name: Test
+      run: dotnet test --framework net5.0 --no-build --verbosity normal

AssetRipper.Primitives.Benckmarks/AssetRipper.Primitives.Benckmarks.csproj

@@ -0,0 +1,15 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+	<PropertyGroup>
+		<OutputType>Exe</OutputType>
+		<LangVersion>Latest</LangVersion>
+		<TargetFrameworks>net5.0;net6.0;net7.0;net8.0</TargetFrameworks>
+		<ImplicitUsings>enable</ImplicitUsings>
+		<Nullable>enable</Nullable>
+	</PropertyGroup>
+
+	<ItemGroup>
+		<PackageReference Include="BenchmarkDotNet" Version="0.13.12" />
+	</ItemGroup>
+
+</Project>

AssetRipper.Primitives.Benckmarks/Program.cs

@@ -0,0 +1,11 @@
+using BenchmarkDotNet.Running;
+
+namespace AssetRipper.Primitives.Benckmarks;
+
+internal static class Program
+{
+	static void Main()
+	{
+		BenchmarkRunner.Run(typeof(Program).Assembly);
+	}
+}

AssetRipper.Primitives.Benckmarks/YearVersionCheck.cs

@@ -0,0 +1,46 @@
+using BenchmarkDotNet.Attributes;
+using BenchmarkDotNet.Jobs;
+using System.Runtime.CompilerServices;
+
+namespace AssetRipper.Primitives.Benckmarks;
+
+[SimpleJob(RuntimeMoniker.Net80)]
+[RPlotExporter]
+public class YearVersionCheck
+{
+	[Params(4, 5, 6, 7, 2016, 2017, 2018, 2022, 2023, 2024)]
+	public ushort Major;
+
+	[Benchmark]
+	public bool Simple() => Major is >= 2017 and <= 2023;
+
+	[Benchmark]
+	public bool BitsWith2016() => BitComparison(Major);
+
+	[Benchmark]
+	public bool BitsWithout2016() => BitComparison(Major) && Major is not 2016;
+
+	[MethodImpl(MethodImplOptions.AggressiveInlining | MethodImplOptions.AggressiveOptimization)]
+	private static bool BitComparison(uint value)
+	{
+		//This function determines if an unsigned integer
+		//is between 2016 and 2023, inclusive. It does this
+		//by comparing bits of the value with know constants.
+
+		const uint VariableBitMask = 0x7;
+		const uint FixedBitMask = ~VariableBitMask;
+		const uint ExpectedFixedBits = 0x7E0;//2016
+		return (value & FixedBitMask) == ExpectedFixedBits;
+	}
+
+	/* Results:
+	 * Due to the simplicity of the methods being profiled,
+	 * benchmarking was inconclusive. The costs of calling
+	 * these methods are almost neglible.
+	 * 
+	 * Decision:
+	 * For the time being, the library will continue to use
+	 * the simple bounds check. If another option is shown
+	 * to be significantly better, I am open to switching.
+	 */
+}

AssetRipper.Primitives.Tests/AssetRipper.Primitives.Tests.csproj

@@ -0,0 +1,26 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+	<PropertyGroup>
+		<TargetFrameworks>netframework3.5;netframework4.0;netframework4.8;net5.0;net6.0;net7.0</TargetFrameworks>
+		<LangVersion>Latest</LangVersion>
+		<Nullable>enable</Nullable>
+
+		<IsPackable>false</IsPackable>
+	</PropertyGroup>
+
+	<ItemGroup>
+		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
+		<PackageReference Include="NUnit" Version="3.14.0" />
+		<PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
+		<PackageReference Include="NUnit.Analyzers" Version="4.1.0">
+			<PrivateAssets>all</PrivateAssets>
+			<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+		</PackageReference>
+		<PackageReference Include="coverlet.collector" Version="6.0.2" />
+	</ItemGroup>
+
+	<ItemGroup>
+		<ProjectReference Include="..\AssetRipper.Primitives\AssetRipper.Primitives.csproj" />
+	</ItemGroup>
+
+</Project>

AssetRipper.Primitives.Tests/ComparisonTests.cs

@@ -0,0 +1,75 @@
+namespace AssetRipper.Primitives.Tests;
+
+public class ComparisonTests
+{
+	private static readonly UnityVersion lowValue = new UnityVersion(2017, 3, 0, UnityVersionType.Patch, 1);
+	private static readonly UnityVersion mediumValue = new UnityVersion(2019, 4, 3, UnityVersionType.Final, 1);
+	private static readonly UnityVersion highValue = new UnityVersion(2020, 2, 0, UnityVersionType.Final, 1);
+
+	[Test]
+	public void LessThanIsTransitive()
+	{
+		Assert.Multiple(() =>
+		{
+			Assert.That(lowValue, Is.LessThan(mediumValue));
+			Assert.That(mediumValue, Is.LessThan(highValue));
+			Assert.That(lowValue, Is.LessThan(highValue));
+		});
+	}
+
+	[Test]
+	public void GreaterThanIsTransitive()
+	{
+		Assert.Multiple(() =>
+		{
+			Assert.That(mediumValue, Is.GreaterThan(lowValue));
+			Assert.That(highValue, Is.GreaterThan(mediumValue));
+			Assert.That(highValue, Is.GreaterThan(lowValue));
+		});
+	}
+
+	[Test]
+	public void WeakInequalityHolds()
+	{
+		UnityVersion low = lowValue;
+		Assert.That(lowValue, Is.LessThanOrEqualTo(low));
+	}
+
+	[Test]
+	public void MinimumValueDefinition()
+	{
+		Assert.That(UnityVersion.MinVersion, Is.EqualTo(new UnityVersion(ushort.MinValue, ushort.MinValue, ushort.MinValue, UnityVersionType.Alpha, byte.MinValue)));
+	}
+
+	[Test]
+	public void MaximumValueDefinition()
+	{
+		Assert.That(UnityVersion.MaxVersion, Is.EqualTo(new UnityVersion(ushort.MaxValue, ushort.MaxValue, ushort.MaxValue, (UnityVersionType)byte.MaxValue, byte.MaxValue)));
+	}
+
+	[Test]
+	public void AnIncreaseOfTypeNumberMakesInequal()
+	{
+		Assert.Multiple(() =>
+		{
+			Assert.That(UnityVersion.MinVersion, Is.LessThan(new UnityVersion(ushort.MinValue, ushort.MinValue, ushort.MinValue, UnityVersionType.Alpha, 1)));
+			Assert.That(lowValue, Is.LessThan(new UnityVersion(lowValue.Major, lowValue.Minor, lowValue.Build, lowValue.Type, (byte)(lowValue.TypeNumber + 1))));
+		});
+	}
+
+	[Test]
+	public void AlphaZeroIsTheDefault()
+	{
+		Assert.That(new UnityVersion(2019, 1, 0), Is.LessThan(new UnityVersion(2019, 1, 0, UnityVersionType.Final, 1)));
+	}
+
+	[Test]
+	public void ComparisonMethodsIgnoreUnspecifiedValues()
+	{
+		Assert.Multiple(() =>
+		{
+			Assert.That(new UnityVersion(2019, 1, 0, UnityVersionType.Final, 1).GreaterThanOrEquals(2019, 1, 0));
+			Assert.That(new UnityVersion(2019, 1, 0, UnityVersionType.Final, 1).LessThanOrEquals(2019, 1, 0));
+		});
+	}
+}

AssetRipper.Primitives.Tests/DistanceTests.cs

@@ -0,0 +1,44 @@
+namespace AssetRipper.Primitives.Tests;
+
+public class DistanceTests
+{
+	private static readonly UnityVersion version3 = new UnityVersion(3, 0, 0, UnityVersionType.Final, 1);
+	private static readonly UnityVersion version4 = new UnityVersion(4, 4, 0, UnityVersionType.Alpha, 1);
+	private static readonly UnityVersion version5 = new UnityVersion(5, 6, 1, UnityVersionType.Final, 11);
+	private static readonly UnityVersion version6 = new UnityVersion(6, 0, 0, UnityVersionType.Final, 1);
+	private static readonly UnityVersion version7 = new UnityVersion(7, 0, 0, UnityVersionType.Final, 1);
+	private static readonly UnityVersion version8 = new UnityVersion(8, 0, 0, UnityVersionType.Final, 1);
+	private static readonly UnityVersion version9 = new UnityVersion(9, 0, 0, UnityVersionType.Final, 1);
+	private static readonly UnityVersion[] versionArray = new UnityVersion[] { version3, version4, version5, version6, version7, version8, version9 };
+
+	[Test]
+	public void DistanceFunctionIsSymmetric()
+	{
+		ulong distance1 = UnityVersion.Distance(version4, version5);
+		ulong distance2 = UnityVersion.Distance(version5, version4);
+		Assert.That(distance1, Is.EqualTo(distance2));
+	}
+
+	[Test]
+	public void DistanceIsZeroForEquivalentVersions()
+	{
+		ulong distance = UnityVersion.Distance(version4, version4);
+		Assert.That(distance, Is.EqualTo(0));
+	}
+
+	[Test]
+	public void CorrectlyReturnsVersion6()
+	{
+		UnityVersion version = new UnityVersion(6, 1);
+		UnityVersion closest = version.GetClosestVersion(versionArray);
+		Assert.That(closest, Is.EqualTo(version6));
+	}
+
+	[Test]
+	public void CorrectlyReturnsVersion5()
+	{
+		UnityVersion version = new UnityVersion(5, 4, 9);
+		UnityVersion closest = version.GetClosestVersion(versionArray);
+		Assert.That(closest, Is.EqualTo(version5));
+	}
+}

AssetRipper.Primitives.Tests/ParsingTests.cs

@@ -0,0 +1,79 @@
+using NUnit.Framework.Internal;
+using System.Collections.Generic;
+
+namespace AssetRipper.Primitives.Tests;
+
+public class ParsingTests
+{
+	[TestCase("4.2.2f1", 4, 2, 2, UnityVersionType.Final, 1, null, "Normal Unity 4 Version")]
+	[TestCase("4.2.2f1\n1", 4, 2, 2, UnityVersionType.Final, 1, "\n1", "Custom Unity 4 Version")]
+	[TestCase("2343.4.5f7", 2343, 4, 5, UnityVersionType.Final, 7, null, "Fictitious Future Version")]
+	[TestCase("2019.2.2f1c2\n2", 2019, 2, 2, UnityVersionType.China, 2, "\n2", "Fake Custom Chinese Version")]
+	[TestCase("2019.4", 2019, 4, 0, UnityVersionType.Final, 1, null, "Major Minor Only")]
+	[TestCase("2019.4.3", 2019, 4, 3, UnityVersionType.Final, 1, null, "Major Minor Build Only")]
+	[TestCase("2019.2.2f1-letters", 2019, 2, 2, UnityVersionType.Final, 1, "-letters", "Issue #40 - Appended Custom Characters")]
+	public void UnityVersionParsesCorrectly(string versionString, int major, int minor, int build, UnityVersionType type, int typeNumber, string? customEngine, string name)
+	{
+		UnityVersion expected = new UnityVersion((ushort)major, (ushort)minor, (ushort)build, type, (byte)typeNumber);
+		UnityVersion parsedVersion = UnityVersion.Parse(versionString, out string? parsedCustomEngine);
+		Assert.Multiple(() =>
+		{
+			Assert.That(parsedCustomEngine, Is.EqualTo(customEngine), $"The custom engine boolean is incorrect for '{name}'");
+			Assert.That(parsedVersion, Is.EqualTo(expected), $"The parsed version is incorrect for '{name}'");
+			if (customEngine is not null || typeNumber is not 1)
+			{
+				Assert.That(parsedVersion.ToString(UnityVersionFormatFlags.Default, parsedCustomEngine ?? ""), Is.EqualTo(versionString));
+			}
+		});
+	}
+
+	[TestCaseSource(nameof(GenerateRandomVersions), new object[] { 20 })]
+	public void UnityVersionToStringParsesCorrectly(UnityVersion version)
+	{
+		string versionString = version.ToString();
+		UnityVersion parsedVersion = UnityVersion.Parse(versionString, out string? customEngine);
+		Assert.Multiple(() =>
+		{
+			Assert.That(customEngine, Is.Null);
+			Assert.That(parsedVersion, Is.EqualTo(version));
+		});
+	}
+
+	[Test]
+	public void LongChineseVersionFormat()
+	{
+		//This is an actual version from a game.
+		//Versions like 2019.3.0f2 and 2020.3.15f2 don't have corresponding Chinese versions.
+		//Source: https://unity.cn/releases
+		string version = "2021.3.11f1c2";
+		UnityVersion expected = new UnityVersion(2021, 3, 11, UnityVersionType.China, 2);
+		Assert.Multiple(() =>
+		{
+			Assert.That(UnityVersion.Parse(version), Is.EqualTo(expected));
+			Assert.That(expected.ToString(), Is.EqualTo(version));
+		});
+	}
+
+	[Test]
+	public void ShortChineseVersionFormat()
+	{
+		//This is an actual version from a game.
+		//Source: https://github.com/AssetRipper/AssetRipper/issues/841
+		string version = "2017.4.40c1";
+		UnityVersion expected = new UnityVersion(2017, 4, 40, UnityVersionType.China, 1);
+		Assert.Multiple(() =>
+		{
+			Assert.That(UnityVersion.Parse(version), Is.EqualTo(expected));
+			Assert.That(expected.ToString(UnityVersionFormatFlags.UseShortChineseFormat), Is.EqualTo(version));
+		});
+	}
+
+	private static IEnumerable<UnityVersion> GenerateRandomVersions(int count)
+	{
+		Randomizer random = TestContext.CurrentContext.Random;
+		for (int i = 0; i < count; i++)
+		{
+			yield return new UnityVersion(random.NextUShort(), random.NextUShort(), random.NextUShort(), random.NextEnum<UnityVersionType>(), random.NextByte());
+		}
+	}
+}

AssetRipper.Primitives.Tests/UnityGuidTests.cs

@@ -0,0 +1,90 @@
+#if NET5_0_OR_GREATER
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+namespace AssetRipper.Primitives.Tests;
+
+public class UnityGuidTests
+{
+	private const string randomGuidString = "352a5b3897136ed2702a283243520538";
+	private const string sequentialGuidString = "0123456789abcdef0fedcba987654321";
+
+	[Test]
+	public void MissingReferenceSerializedCorrectly()
+	{
+		Assert.That(UnityGuid.MissingReference.ToString(), Is.EqualTo("0000000deadbeef15deadf00d0000000"));
+	}
+
+	[Test]
+	public void ToByteArrayIsConsistentWithConstructorFromByteArray()
+	{
+		UnityGuid guid = UnityGuid.NewGuid();
+		byte[] bytes = guid.ToByteArray();
+		UnityGuid fromBytes = new UnityGuid(bytes);
+		Assert.That(fromBytes, Is.EqualTo(guid));
+		Assert.That(fromBytes.ToString(), Is.EqualTo(guid.ToString()));
+	}
+
+	[Test]
+	public void ConversionFromSystemGuidToUnityGuidProducesSameString()
+	{
+		Guid systemGuid = Guid.NewGuid();
+		UnityGuid unityGUID = new UnityGuid(systemGuid);
+		Assert.That(unityGUID.ToString(), Is.EqualTo(systemGuid.ToString().Replace("-", "")));
+	}
+
+	[Test]
+	public void IsZeroReturnsTrueForTheZeroGuid()
+	{
+		UnityGuid unityGUID = new UnityGuid(0, 0, 0, 0);
+		Assert.That(unityGUID.IsZero, Is.True);
+	}
+
+	[Test]
+	public void IsZeroReturnsFalseForRandomGuid()
+	{
+		UnityGuid unityGUID = UnityGuid.NewGuid();
+		Assert.That(unityGUID.IsZero, Is.False);
+	}
+
+	[Test]
+	public void ParsedGuidOutputsSameString()
+	{
+		UnityGuid parsedGUID = UnityGuid.Parse(randomGuidString);
+		string outputedString = parsedGUID.ToString();
+		Assert.That(outputedString, Is.EqualTo(randomGuidString));
+	}
+
+	[Test]
+	public void ConversionsAreInverses()
+	{
+		UnityGuid unityGuid = UnityGuid.NewGuid();
+		Guid systemGuid = (Guid)unityGuid;
+		Assert.That((UnityGuid)systemGuid, Is.EqualTo(unityGuid));
+	}
+
+	[Test]
+	public void ByteConversionIsItsOwnInverse()
+	{
+		UnityGuid originalGuid = UnityGuid.NewGuid();
+		UnityGuid inverseGuid = new UnityGuid(originalGuid.ToByteArray());
+		UnityGuid equivalentGuid = new UnityGuid(inverseGuid.ToByteArray());
+		Assert.That(equivalentGuid, Is.EqualTo(originalGuid));
+	}
+
+	[Test]
+	public void UnityGuidIsTheSameSizeAsSystemGuid()
+	{
+		Assert.That(Unsafe.SizeOf<UnityGuid>(), Is.EqualTo(Unsafe.SizeOf<Guid>()));
+	}
+
+	[Test]
+	public void ToBytesMethod()
+	{
+		Guid originalGuid = Guid.NewGuid();
+		UnityGuid tobyteArrayGuid = new UnityGuid(originalGuid.ToByteArray());
+		UnityGuid memoryMarshallGuid = Unsafe.As<Guid, UnityGuid>(ref originalGuid);
+		Assert.That(memoryMarshallGuid, Is.EqualTo(tobyteArrayGuid));
+	}
+}
+#endif

AssetRipper.Primitives.Tests/Usings.cs

@@ -0,0 +1,2 @@
+global using NUnit.Framework;
+global using System;

AssetRipper.Primitives.Tests/Utf8StringTests.cs

@@ -0,0 +1,87 @@
+#if NET5_0_OR_GREATER
+namespace AssetRipper.Primitives.Tests;
+
+public class Utf8StringTests
+{
+	[Test]
+	public void Utf8StringEqualityWorks()
+	{
+		Utf8String utf8Str = new Utf8String("AssetRipperTestString");
+		Utf8String utf8Str2 = new Utf8String(utf8Str.Data.ToArray());
+
+		Assert.That(utf8Str2, Is.EqualTo(utf8Str));
+	}
+
+	[Test]
+	public void StringEmptyIsEquivalentToUtf8StringEmpty()
+	{
+		Assert.Multiple(() =>
+		{
+			Assert.That(Utf8String.Empty.Data.Length, Is.EqualTo(0));
+			Assert.That(Utf8String.Empty.String, Is.Empty);
+#pragma warning disable NUnit2010 // Use EqualConstraint for better assertion messages in case of failure
+			Assert.That(Utf8String.Empty == "");
+			Assert.That("" == Utf8String.Empty);
+#pragma warning restore NUnit2010 // Use EqualConstraint for better assertion messages in case of failure
+			Assert.That(new Utf8String(""), Is.EqualTo(Utf8String.Empty));
+		});
+	}
+
+	/// <summary>
+	/// <see href="https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/proposals/csharp-11.0/utf8-string-literals"/>
+	/// </summary>
+	[Test]
+	public void Utf8StringMadeFromUtf8LiteralIsTheSameAsMadeFromConstantString()
+	{
+		Utf8String dataString = "AssetRipperTestString"u8;
+		Utf8String systemString = "AssetRipperTestString";
+		Assert.That(dataString, Is.EqualTo(systemString));
+	}
+
+	[Test]
+	public void ConcatenationBetweenTwoUtf8StringsWorks()
+	{
+		Utf8String dataString = "AssetRipperTestString"u8;
+		Utf8String systemString = "AssetRipperTestString";
+		Utf8String concatenated = dataString + systemString;
+		Assert.That(concatenated, Is.EqualTo((Utf8String)"AssetRipperTestStringAssetRipperTestString"u8));
+	}
+
+	[Test]
+	public void ConcatenationBetweenThreeUtf8StringsWorksTheSameAsAddition()
+	{
+		Utf8String added = "String1"u8 + new Utf8String("2") + "3"u8;
+		Utf8String concatenated = Utf8String.Concat("String1"u8, "2"u8, "3"u8);
+		Assert.That(added, Is.EqualTo(concatenated));
+	}
+
+	[Test]
+	public void ConcatenationBetweenFourUtf8StringsWorks()
+	{
+		Utf8String string1 = "hello"u8;
+		Utf8String string2 = " world"u8;
+		Utf8String string3 = "!"u8;
+		Utf8String string4 = ", how are you?"u8;
+		Utf8String concatenated = Utf8String.Concat(string1, string2, string3, string4);
+		Assert.That(concatenated, Is.EqualTo((Utf8String)"hello world!, how are you?"u8));
+	}
+
+	[Test]
+	public void IsNullOrEmptyReturnsTrueForEmptyString()
+	{
+		Assert.That(Utf8String.IsNullOrEmpty(Utf8String.Empty), Is.True);
+	}
+
+	[Test]
+	public void IsNullOrEmptyReturnsTrueForNullString()
+	{
+		Assert.That(Utf8String.IsNullOrEmpty(null), Is.True);
+	}
+
+	[Test]
+	public void IsNullOrEmptyReturnsFalseForNonEmptyString()
+	{
+		Assert.That(Utf8String.IsNullOrEmpty("AssetRipperTestString"u8), Is.False);
+	}
+}
+#endif

AssetRipper.Primitives.sln

@@ -0,0 +1,58 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.0.32112.339
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{36D291AB-E468-4CE7-8DB3-2C46639FE5AE}"
+	ProjectSection(SolutionItems) = preProject
+		.gitignore = .gitignore
+		License.md = License.md
+		README.md = README.md
+	EndProjectSection
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Licenses", "Licenses", "{4BE414B8-5B2D-40C1-BA3E-7DBBD6F7D854}"
+	ProjectSection(SolutionItems) = preProject
+		Licenses\uTinyRipper.md = Licenses\uTinyRipper.md
+	EndProjectSection
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Workflows", "Workflows", "{B63714DC-6258-4032-9930-DFF0667624BC}"
+	ProjectSection(SolutionItems) = preProject
+		.github\workflows\dotnet.yml = .github\workflows\dotnet.yml
+	EndProjectSection
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "AssetRipper.Primitives", "AssetRipper.Primitives\AssetRipper.Primitives.csproj", "{0B77D2BD-812E-4717-8D11-2F6C09167C41}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "AssetRipper.Primitives.Tests", "AssetRipper.Primitives.Tests\AssetRipper.Primitives.Tests.csproj", "{545E670D-141B-4F05-9AFD-2F184A59EADC}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AssetRipper.Primitives.Benckmarks", "AssetRipper.Primitives.Benckmarks\AssetRipper.Primitives.Benckmarks.csproj", "{E3DEB571-4EE4-4C89-9005-DB10D9FB561B}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{0B77D2BD-812E-4717-8D11-2F6C09167C41}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{0B77D2BD-812E-4717-8D11-2F6C09167C41}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{0B77D2BD-812E-4717-8D11-2F6C09167C41}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{0B77D2BD-812E-4717-8D11-2F6C09167C41}.Release|Any CPU.Build.0 = Release|Any CPU
+		{545E670D-141B-4F05-9AFD-2F184A59EADC}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{545E670D-141B-4F05-9AFD-2F184A59EADC}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{545E670D-141B-4F05-9AFD-2F184A59EADC}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{545E670D-141B-4F05-9AFD-2F184A59EADC}.Release|Any CPU.Build.0 = Release|Any CPU
+		{E3DEB571-4EE4-4C89-9005-DB10D9FB561B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{E3DEB571-4EE4-4C89-9005-DB10D9FB561B}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{E3DEB571-4EE4-4C89-9005-DB10D9FB561B}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{E3DEB571-4EE4-4C89-9005-DB10D9FB561B}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(NestedProjects) = preSolution
+		{4BE414B8-5B2D-40C1-BA3E-7DBBD6F7D854} = {36D291AB-E468-4CE7-8DB3-2C46639FE5AE}
+		{B63714DC-6258-4032-9930-DFF0667624BC} = {36D291AB-E468-4CE7-8DB3-2C46639FE5AE}
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {370218F4-B218-4C62-B7F7-D03B799F6349}
+	EndGlobalSection
+EndGlobal

AssetRipper.Primitives/AssetRipper.Primitives.csproj

@@ -0,0 +1,69 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+	<PropertyGroup>
+		<TargetFrameworks>netframework3.5;netframework4.0;netstandard2.0;net5.0;net6.0;net7.0</TargetFrameworks>
+		<LangVersion>Latest</LangVersion>
+		<Nullable>enable</Nullable>
+		<Authors>ds5678</Authors>
+		<Company>AssetRipper</Company>
+		<Version>3.0.0</Version>
+		<AssemblyVersion>$(Version)</AssemblyVersion>
+		<PackageId>AssetRipper.Primitives</PackageId>
+		<PackageTags>C# assetripper unity unity3d</PackageTags>
+		<RepositoryUrl>https://github.com/AssetRipper/AssetRipper.Primitives</RepositoryUrl>
+		<PackageLicenseExpression>MIT</PackageLicenseExpression>
+		<RepositoryType>git</RepositoryType>
+		<PackageProjectUrl>https://github.com/AssetRipper/AssetRipper.Primitives</PackageProjectUrl>
+		<Copyright>Copyright (c) 2022-2023 ds5678</Copyright>
+		<Description>Managed library for primitive types used in AssetRipper.</Description>
+		<GeneratePackageOnBuild>true</GeneratePackageOnBuild>
+		<GenerateDocumentationFile>true</GenerateDocumentationFile>
+		<NoWarn>1591</NoWarn>
+	</PropertyGroup>
+	
+	<PropertyGroup Condition=" '$(TargetFramework)' != 'netframework3.5' and '$(TargetFramework)' != 'netframework4.0' ">
+		<IsTrimmable>true</IsTrimmable>
+	</PropertyGroup>
+
+	<ItemGroup>
+		<PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0">
+			<PrivateAssets>all</PrivateAssets>
+			<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+		</PackageReference>
+		<PackageReference Include="PolySharp" Version="1.14.1">
+			<PrivateAssets>all</PrivateAssets>
+			<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+		</PackageReference>
+	</ItemGroup>
+
+	<ItemGroup Condition="'$(TargetFramework)' == 'netstandard2.0'">
+		<PackageReference Include="Microsoft.Bcl.HashCode">
+			<Version>1.1.1</Version>
+		</PackageReference>
+		<PackageReference Include="System.Memory">
+			<Version>4.5.5</Version>
+		</PackageReference>
+		<PackageReference Include="System.Text.Json">
+			<Version>8.0.1</Version>
+		</PackageReference>
+	</ItemGroup>
+
+	<ItemGroup Condition="'$(TargetFramework)' == 'net5.0'">
+		<PackageReference Include="System.Text.Json">
+			<Version>8.0.1</Version>
+		</PackageReference>
+	</ItemGroup>
+
+	<ItemGroup Condition="'$(TargetFramework)' == 'net6.0'">
+		<PackageReference Include="System.Text.Json">
+			<Version>8.0.1</Version>
+		</PackageReference>
+	</ItemGroup>
+
+	<ItemGroup Condition="'$(TargetFramework)' == 'net7.0'">
+		<PackageReference Include="System.Text.Json">
+			<Version>8.0.1</Version>
+		</PackageReference>
+	</ItemGroup>
+
+</Project>

AssetRipper.Primitives/Extensions/CharacterExtensions.cs

@@ -0,0 +1,27 @@
+namespace AssetRipper.Primitives.Extensions;
+
+/// <summary>
+/// Extensions for <see cref="char"/>
+/// </summary>
+public static class CharacterExtensions
+{
+	/// <summary>
+	/// Parse a character into a Unity Version Type
+	/// </summary>
+	/// <param name="c">The character</param>
+	/// <returns></returns>
+	/// <exception cref="ArgumentException">No version type for character</exception>
+	public static UnityVersionType ToUnityVersionType(this char c)
+	{
+		return c switch
+		{
+			'a' => UnityVersionType.Alpha,
+			'b' => UnityVersionType.Beta,
+			'c' => UnityVersionType.China,
+			'f' => UnityVersionType.Final,
+			'p' => UnityVersionType.Patch,
+			'x' => UnityVersionType.Experimental,
+			_ => throw new ArgumentException($"There is no version type {c}", nameof(c)),
+		};
+	}
+}

AssetRipper.Primitives/Extensions/RegexExtensions.cs

@@ -0,0 +1,21 @@
+using System.Diagnostics.CodeAnalysis;
+using System.Text.RegularExpressions;
+
+namespace AssetRipper.Primitives.Extensions;
+
+internal static class RegexExtensions
+{
+	public static bool TryMatch(this Regex regex, string input, [NotNullWhen(true)] out Match? match)
+	{
+		match = regex.Match(input);
+		if (match.Success)
+		{
+			return true;
+		}
+		else
+		{
+			match = null;
+			return false;
+		}
+	}
+}

AssetRipper.Primitives/Properties/AssemblyInfo.cs

@@ -0,0 +1,3 @@
+using System.Runtime.CompilerServices;
+
+[assembly: InternalsVisibleTo("VersionUtilities.Tests")]

AssetRipper.Primitives/UnityGuid.cs

@@ -0,0 +1,274 @@
+#if NET5_0_OR_GREATER || NETSTANDARD2_0_OR_GREATER
+using System.Buffers.Binary;
+using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using System.Security.Cryptography;
+using System.Text;
+using System.Text.Json.Serialization;
+
+namespace AssetRipper.Primitives;
+
+[JsonConverter(typeof(UnityGuidJsonConverter))]
+public readonly record struct UnityGuid
+{
+	public UnityGuid(Guid guid)
+	{
+#if NET5_0_OR_GREATER
+		Span<byte> guidData = stackalloc byte[16];
+		bool success = guid.TryWriteBytes(guidData);
+		Debug.Assert(success);
+#else
+		Span<byte> guidData = guid.ToByteArray();
+#endif
+		ConvertSystemOrUnityBytes(guidData, guidData);
+		Data0 = ReadUInt32LittleEndian(guidData, 0);
+		Data1 = ReadUInt32LittleEndian(guidData, 1);
+		Data2 = ReadUInt32LittleEndian(guidData, 2);
+		Data3 = ReadUInt32LittleEndian(guidData, 3);
+	}
+
+	public UnityGuid(ReadOnlySpan<byte> guidData)
+	{
+		Data0 = ReadUInt32LittleEndian(guidData, 0);
+		Data1 = ReadUInt32LittleEndian(guidData, 1);
+		Data2 = ReadUInt32LittleEndian(guidData, 2);
+		Data3 = ReadUInt32LittleEndian(guidData, 3);
+	}
+
+	public UnityGuid(uint data0, uint data1, uint data2, uint data3)
+	{
+		Data0 = data0;
+		Data1 = data1;
+		Data2 = data2;
+		Data3 = data3;
+	}
+
+	public static UnityGuid NewGuid()
+	{
+		//This is not an acceptable way to convert between Unity and System Guids.
+		//We only do it this way to efficiently get 16 random bytes.
+		//We don't care about official Guid validity because Unity does not care either.
+		if (Unsafe.SizeOf<Guid>() == Unsafe.SizeOf<UnityGuid>())
+		{
+			Guid guid = Guid.NewGuid();
+			return Unsafe.As<Guid, UnityGuid>(ref guid);
+		}
+		else
+		{
+			return ThrowOrReturnDefault();
+		}
+
+		static UnityGuid ThrowOrReturnDefault()
+		{
+#if DEBUG
+			throw new InvalidCastException($"{nameof(UnityGuid)} struct size does not match {nameof(Guid)}.");
+#else
+			return default;
+#endif
+		}
+	}
+
+	public static explicit operator UnityGuid(Guid systemGuid) => new UnityGuid(systemGuid);
+
+	public static explicit operator Guid(UnityGuid unityGuid)
+	{
+		Span<byte> span = stackalloc byte[16];
+		unityGuid.Write(span);
+		ConvertSystemOrUnityBytes(span, span);
+#if NET5_0_OR_GREATER
+		return new Guid(span);
+#else
+		return new Guid(span.ToArray());
+#endif
+	}
+
+	private void Write(Span<byte> span)
+	{
+		BinaryPrimitives.WriteUInt32LittleEndian(span.Slice(0 * sizeof(uint), sizeof(uint)), Data0);
+		BinaryPrimitives.WriteUInt32LittleEndian(span.Slice(1 * sizeof(uint), sizeof(uint)), Data1);
+		BinaryPrimitives.WriteUInt32LittleEndian(span.Slice(2 * sizeof(uint), sizeof(uint)), Data2);
+		BinaryPrimitives.WriteUInt32LittleEndian(span.Slice(3 * sizeof(uint), sizeof(uint)), Data3);
+	}
+
+	public byte[] ToByteArray()
+	{
+		byte[] result = new byte[16];
+		Write(result);
+		return result;
+	}
+
+	public override string ToString()
+	{
+		Span<char> span = stackalloc char[32];
+		ToString(span);
+		return CreateString(span);
+
+		static string CreateString(Span<char> span)
+		{
+#if NET5_0_OR_GREATER
+			return new string(span);
+#else
+			return new string(span.ToArray());
+#endif
+		}
+	}
+
+	public void ToString(Span<char> buffer)
+	{
+		ReadOnlySpan<char> span = stackalloc char[32]
+		{
+			GetHexChar(Data0, 0),
+			GetHexChar(Data0, 4),
+			GetHexChar(Data0, 8),
+			GetHexChar(Data0, 12),
+			GetHexChar(Data0, 16),
+			GetHexChar(Data0, 20),
+			GetHexChar(Data0, 24),
+			GetHexChar(Data0, 28),
+			GetHexChar(Data1, 0),
+			GetHexChar(Data1, 4),
+			GetHexChar(Data1, 8),
+			GetHexChar(Data1, 12),
+			GetHexChar(Data1, 16),
+			GetHexChar(Data1, 20),
+			GetHexChar(Data1, 24),
+			GetHexChar(Data1, 28),
+			GetHexChar(Data2, 0),
+			GetHexChar(Data2, 4),
+			GetHexChar(Data2, 8),
+			GetHexChar(Data2, 12),
+			GetHexChar(Data2, 16),
+			GetHexChar(Data2, 20),
+			GetHexChar(Data2, 24),
+			GetHexChar(Data2, 28),
+			GetHexChar(Data3, 0),
+			GetHexChar(Data3, 4),
+			GetHexChar(Data3, 8),
+			GetHexChar(Data3, 12),
+			GetHexChar(Data3, 16),
+			GetHexChar(Data3, 20),
+			GetHexChar(Data3, 24),
+			GetHexChar(Data3, 28),
+		};
+
+		span.CopyTo(buffer);
+
+		static char GetHexChar(uint value, int offset)
+		{
+			int index = unchecked((int)((value >> offset) & 0xF));
+			return "0123456789abcdef"[index];
+		}
+	}
+
+	/// <summary>
+	/// Read little-endian <see cref="uint"/> from <see cref="ReadOnlySpan{T}"/>
+	/// </summary>
+	/// <param name="byteSpan">A span of bytes.</param>
+	/// <param name="index">The ith <see cref="uint"/> in <paramref name="byteSpan"/>.</param>
+	/// <returns></returns>
+	private static uint ReadUInt32LittleEndian(ReadOnlySpan<byte> byteSpan, int index)
+	{
+		return BinaryPrimitives.ReadUInt32LittleEndian(byteSpan.Slice(index * sizeof(uint), sizeof(uint)));
+	}
+
+	/// <summary>
+	/// Converts system bytes to unity bytes, or the reverse
+	/// </summary>
+	/// <param name="input">A 16 byte input span</param>
+	/// <param name="output">A 16 byte output span</param>
+	/// <returns>The same span: <paramref name="input"/></returns>
+	/// <exception cref="ArgumentException">Span doesn't have 16 elements</exception>
+	private static void ConvertSystemOrUnityBytes(scoped ReadOnlySpan<byte> input, scoped Span<byte> output)
+	{
+		if (input.Length != 16)
+		{
+			throw new ArgumentException($"Invalid length: {input.Length}", nameof(input));
+		}
+		if (output.Length != 16)
+		{
+			throw new ArgumentException($"Invalid length: {output.Length}", nameof(output));
+		}
+
+		//Unity Guid's are in big endian, so the bytes have to be flipped for multibyte fields
+		(output[0], output[1], output[2], output[3]) = (input[3], input[2], input[1], input[0]);
+		(output[4], output[5]) = (input[5], input[4]);
+		(output[6], output[7]) = (input[7], input[6]);
+		input.Slice(8).CopyTo(output.Slice(8));
+		for (int i = 0; i < 16; i++)
+		{
+			//AB becomes BA
+			uint value = output[i];
+			output[i] = (byte)(unchecked(value << 4 & 0xF0) | unchecked(value >> 4 & 0xF));
+		}
+	}
+
+	public static UnityGuid Parse(string guidString) => new UnityGuid(Guid.Parse(guidString));
+
+	/// <summary>
+	/// Make a guid by MD5 hashing a string
+	/// </summary>
+	/// <remarks>
+	/// The returned guid is most likely not "valid" by official standards. However, Unity doesn't seem to care.
+	/// </remarks>
+	/// <param name="str">Input string. Can be any length</param>
+	/// <returns>A stable guid corresponding to the input string</returns>
+	public static UnityGuid Md5Hash(string str) => Md5Hash(Encoding.UTF8.GetBytes(str));
+
+	/// <summary>
+	/// Make a guid by MD5 hashing some input data
+	/// </summary>
+	/// <remarks>
+	/// The returned guid is most likely not "valid" by official standards. However, Unity doesn't seem to care.
+	/// </remarks>
+	/// <param name="input">Input data. Can be any length</param>
+	/// <returns>A stable guid corresponding to the <paramref name="input"/>.</returns>
+	public static UnityGuid Md5Hash(scoped ReadOnlySpan<byte> input)
+	{
+		Span<byte> buffer = stackalloc byte[16];
+		HashData(input, buffer);
+		ConvertSystemOrUnityBytes(buffer, buffer);
+		return new UnityGuid(buffer);
+	}
+
+	private static void HashData(ReadOnlySpan<byte> data, Span<byte> buffer)
+	{
+#if NET5_0_OR_GREATER
+		MD5.HashData(data, buffer);
+#else
+		MD5.Create().ComputeHash(data.ToArray()).AsSpan().CopyTo(buffer);
+#endif
+	}
+
+	public static UnityGuid Md5Hash(scoped ReadOnlySpan<byte> assemblyName, scoped ReadOnlySpan<byte> @namespace, scoped ReadOnlySpan<byte> className)
+	{
+		int length = assemblyName.Length + @namespace.Length + className.Length;
+		Span<byte> input = length < 1024
+			? stackalloc byte[length]
+#if NET5_0_OR_GREATER
+			: GC.AllocateUninitializedArray<byte>(length);
+#else
+			: new byte[length];
+#endif
+		assemblyName.CopyTo(input);
+		@namespace.CopyTo(input.Slice(assemblyName.Length));
+		className.CopyTo(input.Slice(assemblyName.Length + @namespace.Length));
+		return Md5Hash(input);
+	}
+
+	public bool IsZero => Data0 == 0 && Data1 == 0 && Data2 == 0 && Data3 == 0;
+
+	public uint Data0 { get; }
+	public uint Data1 { get; }
+	public uint Data2 { get; }
+	public uint Data3 { get; }
+
+	/// <summary>
+	/// 0x0000000DEADBEEF15DEADF00D0000000
+	/// </summary>
+	public static UnityGuid MissingReference { get; } = new UnityGuid(0xD0000000, 0x1FEEBDAE, 0x00FDAED5, 0x0000000D);
+
+	public static UnityGuid Zero => default;
+}
+#endif

AssetRipper.Primitives/UnityGuidJsonConverter.cs

@@ -0,0 +1,19 @@
+#if NET5_0_OR_GREATER || NETSTANDARD2_0_OR_GREATER
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace AssetRipper.Primitives;
+
+public sealed class UnityGuidJsonConverter : JsonConverter<UnityGuid>
+{
+	public override UnityGuid Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+	{
+		return UnityGuid.Parse(reader.GetString() ?? throw new JsonException("String was read as null"));
+	}
+
+	public override void Write(Utf8JsonWriter writer, UnityGuid value, JsonSerializerOptions options)
+	{
+		writer.WriteStringValue(value.ToString());
+	}
+}
+#endif

AssetRipper.Primitives/UnityVersion.ComparisonMethods.cs

@@ -0,0 +1,67 @@
+namespace AssetRipper.Primitives;
+
+public readonly partial struct UnityVersion
+{
+	private const ulong subMajorMask = 0x0000FFFFFFFFFFFFUL;
+	private const ulong subMinorMask = 0x00000000FFFFFFFFUL;
+	private const ulong subBuildMask = 0x000000000000FFFFUL;
+	private const ulong subTypeMask = 0x00000000000000FFUL;
+
+	public bool Equals(ushort major) => this == From(major);
+	public bool Equals(ushort major, ushort minor) => this == From(major, minor);
+	public bool Equals(ushort major, ushort minor, ushort build) => this == From(major, minor, build);
+	public bool Equals(ushort major, ushort minor, ushort build, UnityVersionType type) => this == From(major, minor, build, type);
+	public bool Equals(ushort major, ushort minor, ushort build, UnityVersionType type, byte typeNumber) => this == new UnityVersion(major, minor, build, type, typeNumber);
+	public bool Equals(string version) => this == Parse(version);
+
+	public bool LessThan(ushort major) => this < From(major);
+	public bool LessThan(ushort major, ushort minor) => this < From(major, minor);
+	public bool LessThan(ushort major, ushort minor, ushort build) => this < From(major, minor, build);
+	public bool LessThan(ushort major, ushort minor, ushort build, UnityVersionType type) => this < From(major, minor, build, type);
+	public bool LessThan(ushort major, ushort minor, ushort build, UnityVersionType type, byte typeNumber) => this < new UnityVersion(major, minor, build, type, typeNumber);
+	public bool LessThan(string version) => this < Parse(version);
+
+	public bool LessThanOrEquals(ushort major) => this <= From(major);
+	public bool LessThanOrEquals(ushort major, ushort minor) => this <= From(major, minor);
+	public bool LessThanOrEquals(ushort major, ushort minor, ushort build) => this <= From(major, minor, build);
+	public bool LessThanOrEquals(ushort major, ushort minor, ushort build, UnityVersionType type) => this <= From(major, minor, build, type);
+	public bool LessThanOrEquals(ushort major, ushort minor, ushort build, UnityVersionType type, byte typeNumber) => this <= new UnityVersion(major, minor, build, type, typeNumber);
+	public bool LessThanOrEquals(string version) => this <= Parse(version);
+
+	public bool GreaterThan(ushort major) => this > From(major);
+	public bool GreaterThan(ushort major, ushort minor) => this > From(major, minor);
+	public bool GreaterThan(ushort major, ushort minor, ushort build) => this > From(major, minor, build);
+	public bool GreaterThan(ushort major, ushort minor, ushort build, UnityVersionType type) => this > From(major, minor, build, type);
+	public bool GreaterThan(ushort major, ushort minor, ushort build, UnityVersionType type, byte typeNumber) => this > new UnityVersion(major, minor, build, type, typeNumber);
+	public bool GreaterThan(string version) => this > Parse(version);
+
+	public bool GreaterThanOrEquals(ushort major) => this >= From(major);
+	public bool GreaterThanOrEquals(ushort major, ushort minor) => this >= From(major, minor);
+	public bool GreaterThanOrEquals(ushort major, ushort minor, ushort build) => this >= From(major, minor, build);
+	public bool GreaterThanOrEquals(ushort major, ushort minor, ushort build, UnityVersionType type) => this >= From(major, minor, build, type);
+	public bool GreaterThanOrEquals(ushort major, ushort minor, ushort build, UnityVersionType type, byte typeNumber) => this >= new UnityVersion(major, minor, build, type, typeNumber);
+	public bool GreaterThanOrEquals(string version) => this >= Parse(version);
+	
+	private UnityVersion From(ushort major)
+	{
+		ulong data = ((ulong)major << majorOffset) | subMajorMask & m_data;
+		return new UnityVersion(data);
+	}
+	private UnityVersion From(ushort major, ushort minor)
+	{
+		ulong data = ((ulong)major << majorOffset) | ((ulong)minor << minorOffset) | subMinorMask & m_data;
+		return new UnityVersion(data);
+	}
+	private UnityVersion From(ushort major, ushort minor, ushort build)
+	{
+		ulong data = ((ulong)major << majorOffset) | ((ulong)minor << minorOffset) | ((ulong)build << buildOffset) |
+			subBuildMask & m_data;
+		return new UnityVersion(data);
+	}
+	private UnityVersion From(ushort major, ushort minor, ushort build, UnityVersionType type)
+	{
+		ulong data = ((ulong)major << majorOffset) | ((ulong)minor << minorOffset) | ((ulong)build << buildOffset) |
+			((ulong)(ushort)type << typeOffset) | subTypeMask & m_data;
+		return new UnityVersion(data);
+	}
+}

AssetRipper.Primitives/UnityVersion.DotNet7.cs

@@ -0,0 +1,11 @@
+#if NET7_0_OR_GREATER
+using System.Numerics;
+
+namespace AssetRipper.Primitives;
+partial struct UnityVersion : IComparisonOperators<UnityVersion, UnityVersion, bool>, IEqualityOperators<UnityVersion, UnityVersion, bool>, IMinMaxValue<UnityVersion>
+{
+	static UnityVersion IMinMaxValue<UnityVersion>.MaxValue => MaxVersion;
+
+	static UnityVersion IMinMaxValue<UnityVersion>.MinValue => MinVersion;
+}
+#endif

AssetRipper.Primitives/UnityVersion.Interfaces.cs

@@ -0,0 +1,55 @@
+namespace AssetRipper.Primitives;
+
+public readonly partial struct UnityVersion : IEquatable<UnityVersion>, IComparable, IComparable<UnityVersion>
+{
+	/// <summary>
+	/// Compare to another object
+	/// </summary>
+	/// <param name="obj">Another object</param>
+	/// <returns>
+	/// 1 if this is larger or the other is not a Unity version<br/>
+	/// -1 if this is smaller<br/>
+	/// 0 if equal
+	/// </returns>
+	public int CompareTo(object? obj)
+	{
+		return obj is UnityVersion version ? CompareTo(version) : 1;
+	}
+
+	/// <summary>
+	/// Compare two Unity versions
+	/// </summary>
+	/// <param name="other">Another Unity version</param>
+	/// <returns>
+	/// 1 if this is larger<br/>
+	/// -1 if this is smaller<br/>
+	/// 0 if equal
+	/// </returns>
+	public int CompareTo(UnityVersion other)
+	{
+		return m_data.CompareTo(other.m_data);
+	}
+
+	/// <summary>
+	/// Check equality with another object
+	/// </summary>
+	/// <param name="obj">Another object</param>
+	/// <returns>True if they're equal; false otherwise</returns>
+	public override bool Equals(object? obj)
+	{
+		return obj is UnityVersion version && this == version;
+	}
+
+	/// <summary>
+	/// Check equality with another Unity version
+	/// </summary>
+	/// <param name="other">Another Unity version</param>
+	/// <returns>True if they're equal; false otherwise</returns>
+	public bool Equals(UnityVersion other) => this == other;
+
+	/// <inheritdoc/>
+	public override int GetHashCode()
+	{
+		return m_data.GetHashCode();
+	}
+}

AssetRipper.Primitives/UnityVersion.MathMethods.cs

@@ -0,0 +1,80 @@
+namespace AssetRipper.Primitives;
+
+public readonly partial struct UnityVersion
+{
+	/// <summary>
+	/// A maximizing function for Unity versions
+	/// </summary>
+	/// <param name="left">A Unity version</param>
+	/// <param name="right">A Unity version</param>
+	/// <returns>The larger Unity version</returns>
+	public static UnityVersion Max(UnityVersion left, UnityVersion right)
+	{
+		return left > right ? left : right;
+	}
+
+	/// <summary>
+	/// A minimizing function for Unity versions
+	/// </summary>
+	/// <param name="left">A Unity version</param>
+	/// <param name="right">A Unity version</param>
+	/// <returns>The smaller Unity version</returns>
+	public static UnityVersion Min(UnityVersion left, UnityVersion right)
+	{
+		return left < right ? left : right;
+	}
+
+	/// <summary>
+	/// A distance function for measuring version proximity
+	/// </summary>
+	/// <remarks>
+	/// The returned value is ordinal and should not be saved anywhere.
+	/// It's only for runtime comparisons, such as finding the closest version in a list.
+	/// </remarks>
+	/// <param name="left">A Unity version</param>
+	/// <param name="right">A Unity version</param>
+	/// <returns>
+	/// An ordinal number representing the distance between 2 versions. 
+	/// A value of zero means they're equal.
+	/// </returns>
+	public static ulong Distance(UnityVersion left, UnityVersion right)
+	{
+		return left.m_data < right.m_data 
+			? right.m_data - left.m_data 
+			: left.m_data - right.m_data;
+	}
+
+	/// <summary>
+	/// Get the closest Unity version in an array of versions using <see cref="Distance(UnityVersion, UnityVersion)"/>
+	/// </summary>
+	/// <param name="versions">The Unity version array</param>
+	/// <returns>The closest Unity version</returns>
+	/// <exception cref="ArgumentNullException">The array is null</exception>
+	/// <exception cref="ArgumentException">The array is empty</exception>
+	public UnityVersion GetClosestVersion(UnityVersion[] versions)
+	{
+		if (versions is null)
+		{
+			throw new ArgumentNullException(nameof(versions));
+		}
+
+		if (versions.Length == 0)
+		{
+			throw new ArgumentException("Length cannot be zero", nameof(versions));
+		}
+
+		UnityVersion result = versions[0];
+		ulong currentDistance = Distance(this, result);
+		for(int i = 1; i < versions.Length; i++)
+		{
+			ulong newDistance = Distance(this, versions[i]);
+			if (newDistance < currentDistance)
+			{
+				currentDistance = newDistance;
+				result = versions[i];
+			}
+		}
+
+		return result;
+	}
+}

AssetRipper.Primitives/UnityVersion.Modification.cs

@@ -0,0 +1,38 @@
+namespace AssetRipper.Primitives;
+partial struct UnityVersion
+{
+	/// <summary>
+	/// Change <see cref="Major"/>.
+	/// </summary>
+	/// <param name="value">The new value</param>
+	/// <returns>A new <see cref="UnityVersion"/> with the changed value.</returns>
+	public UnityVersion ChangeMajor(ushort value) => new UnityVersion(value, Minor, Build, Type, TypeNumber);
+
+	/// <summary>
+	/// Change <see cref="Minor"/>.
+	/// </summary>
+	/// <param name="value">The new value</param>
+	/// <returns>A new <see cref="UnityVersion"/> with the changed value.</returns>
+	public UnityVersion ChangeMinor(ushort value) => new UnityVersion(Major, value, Build, Type, TypeNumber);
+
+	/// <summary>
+	/// Change <see cref="Build"/>.
+	/// </summary>
+	/// <param name="value">The new value</param>
+	/// <returns>A new <see cref="UnityVersion"/> with the changed value.</returns>
+	public UnityVersion ChangeBuild(ushort value) => new UnityVersion(Major, Minor, value, Type, TypeNumber);
+
+	/// <summary>
+	/// Change <see cref="Type"/>.
+	/// </summary>
+	/// <param name="value">The new value</param>
+	/// <returns>A new <see cref="UnityVersion"/> with the changed value.</returns>
+	public UnityVersion ChangeType(UnityVersionType value) => new UnityVersion(Major, Minor, Build, value, TypeNumber);
+
+	/// <summary>
+	/// Change <see cref="TypeNumber"/>.
+	/// </summary>
+	/// <param name="value">The new value</param>
+	/// <returns>A new <see cref="UnityVersion"/> with the changed value.</returns>
+	public UnityVersion ChangeTypeNumber(byte value) => new UnityVersion(Major, Minor, Build, Type, value);
+}

AssetRipper.Primitives/UnityVersion.Operators.cs

@@ -0,0 +1,70 @@
+namespace AssetRipper.Primitives;
+
+public readonly partial struct UnityVersion
+{
+	/// <summary>
+	/// Equality operator
+	/// </summary>
+	/// <param name="left">The left Unity version</param>
+	/// <param name="right">The right Unity version</param>
+	/// <returns></returns>
+	public static bool operator ==(UnityVersion left, UnityVersion right)
+	{
+		return left.m_data == right.m_data;
+	}
+
+	/// <summary>
+	/// Inequality operator
+	/// </summary>
+	/// <param name="left">The left Unity version</param>
+	/// <param name="right">The right Unity version</param>
+	/// <returns></returns>
+	public static bool operator !=(UnityVersion left, UnityVersion right)
+	{
+		return left.m_data != right.m_data;
+	}
+
+	/// <summary>
+	/// Greater than
+	/// </summary>
+	/// <param name="left">The left Unity version</param>
+	/// <param name="right">The right Unity version</param>
+	/// <returns></returns>
+	public static bool operator >(UnityVersion left, UnityVersion right)
+	{
+		return left.m_data > right.m_data;
+	}
+
+	/// <summary>
+	/// Greater than or equal to
+	/// </summary>
+	/// <param name="left">The left Unity version</param>
+	/// <param name="right">The right Unity version</param>
+	/// <returns></returns>
+	public static bool operator >=(UnityVersion left, UnityVersion right)
+	{
+		return left.m_data >= right.m_data;
+	}
+
+	/// <summary>
+	/// Less than
+	/// </summary>
+	/// <param name="left">The left Unity version</param>
+	/// <param name="right">The right Unity version</param>
+	/// <returns></returns>
+	public static bool operator <(UnityVersion left, UnityVersion right)
+	{
+		return left.m_data < right.m_data;
+	}
+
+	/// <summary>
+	/// Less than or equal to
+	/// </summary>
+	/// <param name="left">The left Unity version</param>
+	/// <param name="right">The right Unity version</param>
+	/// <returns></returns>
+	public static bool operator <=(UnityVersion left, UnityVersion right)
+	{
+		return left.m_data <= right.m_data;
+	}
+}

AssetRipper.Primitives/UnityVersion.Parsing.cs

@@ -0,0 +1,148 @@
+using AssetRipper.Primitives.Extensions;
+using System.Text.RegularExpressions;
+
+namespace AssetRipper.Primitives;
+
+public readonly partial struct UnityVersion
+{
+	private static readonly Regex majorMinorRegex = new Regex(@"^([0-9]+)\.([0-9]+)$", RegexOptions.Compiled);
+	private static readonly Regex majorMinorBuildRegex = new Regex(@"^([0-9]+)\.([0-9]+)\.([0-9]+)$", RegexOptions.Compiled);
+	private static readonly Regex normalRegex = new Regex(@"^([0-9]+)\.([0-9]+)\.([0-9]+)\.?([abcfpx])([0-9]+)((?:.|[\r\n])+)?$", RegexOptions.Compiled);
+	private static readonly Regex chinaRegex = new Regex(@"^([0-9]+)\.([0-9]+)\.([0-9]+)\.?f1c([0-9]+)((?:.|[\r\n])+)?$", RegexOptions.Compiled);
+	
+	/// <summary>
+	/// Serialize the version as a string using <see cref="UnityVersionFormatFlags.Default"/>.
+	/// </summary>
+	/// <returns>A new string like 2019.4.3f1</returns>
+	public override string ToString() => ToString(UnityVersionFormatFlags.Default);
+
+	/// <summary>
+	/// Serialize the version as a string
+	/// </summary>
+	/// <param name="flags">The flags to control how the version is formatted</param>
+	/// <returns>A new string containing the formatted version.</returns>
+	public string ToString(UnityVersionFormatFlags flags)
+	{
+		return (flags & UnityVersionFormatFlags.ExcludeType) != 0
+			? ToStringWithoutType()
+			: Type is not UnityVersionType.China || (flags & UnityVersionFormatFlags.UseShortChineseFormat) != 0
+				? $"{Major}.{Minor}.{Build}{Type.ToCharacter()}{TypeNumber}"
+				: $"{Major}.{Minor}.{Build}f1c{TypeNumber}";
+	}
+
+	/// <summary>
+	/// Serialize the version as a string
+	/// </summary>
+	/// <param name="flags">The flags to control how the version is formatted</param>
+	/// <param name="customEngineString">The custom engine string to be appended</param>
+	/// <returns>A new string containing the formatted version.</returns>
+	public string ToString(UnityVersionFormatFlags flags,
+#if !NET6_0_OR_GREATER
+		string customEngineString = "")
+#else
+		ReadOnlySpan<char> customEngineString = default)
+#endif
+	{
+		return customEngineString.Length == 0
+			? ToString(flags)
+			: (flags & UnityVersionFormatFlags.ExcludeType) != 0
+				? ToStringWithoutType()
+				: Type is not UnityVersionType.China || (flags & UnityVersionFormatFlags.UseShortChineseFormat) != 0
+					? $"{Major}.{Minor}.{Build}{Type.ToCharacter()}{TypeNumber}{customEngineString}"
+					: $"{Major}.{Minor}.{Build}f1c{TypeNumber}{customEngineString}";
+	}
+
+	/// <summary>
+	/// Serialize the version as a string using only <see cref="Major"/>, <see cref="Minor"/>, and <see cref="Build"/>.
+	/// </summary>
+	/// <returns>A new string like 2019.4.3</returns>
+	public string ToStringWithoutType()
+	{
+		return $"{Major}.{Minor}.{Build}";
+	}
+
+	/// <summary>
+	/// Parse a normal Unity version string
+	/// </summary>
+	/// <param name="s">A string to parse</param>
+	/// <returns>The parsed Unity version</returns>
+	/// <exception cref="ArgumentException">If the string is in an invalid format</exception>
+	public static UnityVersion Parse(string s) => Parse(s, out _);
+
+	/// <summary>
+	/// Parse a normal Unity version string
+	/// </summary>
+	/// <param name="s">A string to parse</param>
+	/// <param name="customEngine">Not null if this version was generated by a custom Unity Engine.</param>
+	/// <returns>The parsed Unity version</returns>
+	/// <exception cref="ArgumentException">If the string is in an invalid format</exception>
+	public static UnityVersion Parse(string s, out string? customEngine)
+	{
+		return TryParse(s, out UnityVersion version, out customEngine)
+			? version
+			: throw new ArgumentException($"Invalid version format: {s}", nameof(s));
+	}
+
+	/// <summary>
+	/// Try to parse a normal Unity version string
+	/// </summary>
+	/// <param name="s">A string to parse</param>
+	/// <param name="version">The parsed Unity version</param>
+	/// <param name="customEngine">Not null if this version was generated by a custom Unity Engine.</param>
+	/// <returns>True if parsing was successful</returns>
+	public static bool TryParse(string s, out UnityVersion version, out string? customEngine)
+	{
+		if (string.IsNullOrEmpty(s))
+		{
+			customEngine = null;
+			version = default;
+			return false;
+		}
+		else if (chinaRegex.TryMatch(s, out Match? match))
+		{
+			int major = int.Parse(match.Groups[1].Value);
+			int minor = int.Parse(match.Groups[2].Value);
+			int build = int.Parse(match.Groups[3].Value);
+			int typeNumber = int.Parse(match.Groups[4].Value);
+			customEngine = GetNullableString(match.Groups[5]);
+			version = new UnityVersion((ushort)major, (ushort)minor, (ushort)build, UnityVersionType.China, (byte)typeNumber);
+			return true;
+		}
+		else if(normalRegex.TryMatch(s, out match))
+		{
+			int major = int.Parse(match.Groups[1].Value);
+			int minor = int.Parse(match.Groups[2].Value);
+			int build = int.Parse(match.Groups[3].Value);
+			char type = match.Groups[4].Value[0];
+			int typeNumber = int.Parse(match.Groups[5].Value);
+			customEngine = GetNullableString(match.Groups[6]);
+			version = new UnityVersion((ushort)major, (ushort)minor, (ushort)build, type.ToUnityVersionType(), (byte)typeNumber);
+			return true;
+		}
+		else if (majorMinorBuildRegex.TryMatch(s, out match))
+		{
+			int major = int.Parse(match.Groups[1].Value);
+			int minor = int.Parse(match.Groups[2].Value);
+			int build = int.Parse(match.Groups[3].Value);
+			customEngine = null;
+			version = new UnityVersion((ushort)major, (ushort)minor, (ushort)build, UnityVersionType.Final, 1);
+			return true;
+		}
+		else if (majorMinorRegex.TryMatch(s, out match))
+		{
+			int major = int.Parse(match.Groups[1].Value);
+			int minor = int.Parse(match.Groups[2].Value);
+			customEngine = null;
+			version = new UnityVersion((ushort)major, (ushort)minor, 0, UnityVersionType.Final, 1);
+			return true;
+		}
+		else
+		{
+			customEngine = null;
+			version = default;
+			return false;
+		}
+
+		static string? GetNullableString(Capture capture) => capture.Length == 0 ? null : capture.Value;
+	}
+}

AssetRipper.Primitives/UnityVersion.cs

@@ -0,0 +1,112 @@
+namespace AssetRipper.Primitives;
+
+/// <summary>
+/// A value type for holding Unity versions
+/// </summary>
+public readonly partial struct UnityVersion
+{
+	private const int majorOffset = 48;
+	private const int minorOffset = 32;
+	private const int buildOffset = 16;
+	private const int typeOffset = 8;
+
+	private const ulong byteMask = 0xFFUL;
+	private const ulong ushortMask = 0xFFFFUL;
+
+	private readonly ulong m_data;
+
+	/// <summary>
+	/// The first number in a Unity version string
+	/// </summary>
+	public ushort Major => unchecked((ushort)((m_data >> majorOffset) & ushortMask));
+
+	/// <summary>
+	/// The second number in a Unity version string
+	/// </summary>
+	public ushort Minor => unchecked((ushort)((m_data >> minorOffset) & ushortMask));
+
+	/// <summary>
+	/// The third number in a Unity version string
+	/// </summary>
+	public ushort Build => unchecked((ushort)((m_data >> buildOffset) & ushortMask));
+
+	/// <summary>
+	/// The letter in a Unity version string
+	/// </summary>
+	public UnityVersionType Type => (UnityVersionType)unchecked((byte)((m_data >> typeOffset) & byteMask));
+
+	/// <summary>
+	/// The last number in a Unity version string
+	/// </summary>
+	public byte TypeNumber => unchecked((byte)(m_data & byteMask));
+
+	/// <summary>
+	/// The minimum value this type can have
+	/// </summary>
+	public static UnityVersion MinVersion { get; } = new UnityVersion(0UL);
+
+	/// <summary>
+	/// The maximum value this type can have
+	/// </summary>
+	public static UnityVersion MaxVersion { get; } = new UnityVersion(ulong.MaxValue);
+
+	/// <summary>
+	/// Construct a new Unity version
+	/// </summary>
+	public UnityVersion(ushort major)
+	{
+		m_data = (ulong)major << majorOffset;
+	}
+
+	/// <summary>
+	/// Construct a new Unity version
+	/// </summary>
+	public UnityVersion(ushort major, ushort minor)
+	{
+		m_data = ((ulong)major << majorOffset) | ((ulong)minor << minorOffset);
+	}
+
+	/// <summary>
+	/// Construct a new Unity version
+	/// </summary>
+	public UnityVersion(ushort major, ushort minor, ushort build)
+	{
+		m_data = ((ulong)major << majorOffset) | ((ulong)minor << minorOffset) | ((ulong)build << buildOffset);
+	}
+
+	/// <summary>
+	/// Construct a new Unity version
+	/// </summary>
+	public UnityVersion(ushort major, ushort minor, ushort build, UnityVersionType type)
+	{
+		m_data = ((ulong)major << majorOffset) | ((ulong)minor << minorOffset) | ((ulong)build << buildOffset)
+			| ((ulong)type << typeOffset);
+	}
+
+	/// <summary>
+	/// Construct a new Unity version
+	/// </summary>
+	public UnityVersion(ushort major, ushort minor, ushort build, UnityVersionType type, byte typeNumber)
+	{
+		m_data = ((ulong)major << majorOffset) | ((ulong)minor << minorOffset) | ((ulong)build << buildOffset)
+			| ((ulong)type << typeOffset) | typeNumber;
+	}
+
+	private UnityVersion(ulong data)
+	{
+		m_data = data;
+	}
+
+	/// <summary>
+	/// Converts this to its binary representation
+	/// </summary>
+	/// <returns>An unsigned long integer having the same bits as this</returns>
+	public ulong GetBits() => m_data;
+
+	/// <summary>
+	/// Converts a binary representation into its respective version
+	/// </summary>
+	/// <param name="bits">An unsigned long integer having the relevant bits</param>
+	/// <returns>A new Unity version with the cooresponding bits</returns>
+	public static UnityVersion FromBits(ulong bits) => new UnityVersion(bits);
+}

AssetRipper.Primitives/UnityVersionFormatFlags.cs

@@ -0,0 +1,25 @@
+namespace AssetRipper.Primitives;
+
+/// <summary>
+/// Flags used when formatting a <see cref="UnityVersion"/>
+/// </summary>
+[Flags]
+public enum UnityVersionFormatFlags
+{
+	/// <summary>
+	/// The default flags when formatting.
+	/// </summary>
+	Default = 0,
+	/// <summary>
+	/// Exclude <see cref="UnityVersion.Type"/>, <see cref="UnityVersion.TypeNumber"/>, and the custom engine number when formatting.
+	/// </summary>
+	ExcludeType = 1 << 0,
+	/// <summary>
+	/// Format chinese versions as 2019.4.3c1 rather than 2019.4.3f1c1
+	/// </summary>
+	/// <remarks>
+	/// An example of the long version can be found in 'unity editor resources' and 'unity_builtin_extra' for the <see href="https://unity.cn/release-notes/full/2019/2019.4.40f1">2019.4.40f1c1</see> version.<br/>
+	/// An example of the short version can be found in <see href="https://github.com/AssetRipper/AssetRipper/issues/841"/>.
+	/// </remarks>
+	UseShortChineseFormat = 1 << 1,
+}

AssetRipper.Primitives/UnityVersionType.cs

@@ -0,0 +1,67 @@
+namespace AssetRipper.Primitives;
+
+/// <summary>
+/// An enumeration representing the letter in a Unity Version string
+/// </summary>
+public enum UnityVersionType : byte
+{
+	/// <summary>
+	/// a
+	/// </summary>
+	Alpha = 0,
+	/// <summary>
+	/// b
+	/// </summary>
+	Beta,
+	/// <summary>
+	/// c
+	/// </summary>
+	China,
+	/// <summary>
+	/// f
+	/// </summary>
+	Final,
+	/// <summary>
+	/// p
+	/// </summary>
+	Patch,
+	/// <summary>
+	/// x
+	/// </summary>
+	Experimental,
+
+	/// <summary>
+	/// The minimum valid value for this enumeration
+	/// </summary>
+	MinValue = Alpha,
+	/// <summary>
+	/// The maximum valid value for this enumeration
+	/// </summary>
+	MaxValue = Experimental,
+}
+
+/// <summary>
+/// Extension methods for <see cref="UnityVersionType"/>
+/// </summary>
+public static class UnityVersionTypeExtentions
+{
+	/// <summary>
+	/// Convert to the relevant character
+	/// </summary>
+	/// <param name="type">A Unity version type</param>
+	/// <returns>The character this value represents</returns>
+	/// <exception cref="ArgumentOutOfRangeException">The type is not a valid value</exception>
+	public static char ToCharacter(this UnityVersionType type)
+	{
+		return type switch
+		{
+			UnityVersionType.Alpha => 'a',
+			UnityVersionType.Beta => 'b',
+			UnityVersionType.China => 'c',
+			UnityVersionType.Final => 'f',
+			UnityVersionType.Patch => 'p',
+			UnityVersionType.Experimental => 'x',
+			_ => 'u',//unknown
+		};
+	}
+}

AssetRipper.Primitives/Usings.cs

@@ -0,0 +1 @@
+global using System;

AssetRipper.Primitives/Utf8String.cs

@@ -0,0 +1,311 @@
+#if NET5_0_OR_GREATER || NETSTANDARD2_0_OR_GREATER
+using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
+using System.Text;
+
+namespace AssetRipper.Primitives;
+
+/// <summary>
+/// An immutable, thread-safe, representation of UTF8 text data.
+/// </summary>
+/// <remarks>
+/// Conversions to and from <see cref="string"/> are handled by <see cref="Encoding.UTF8"/>.
+/// </remarks>
+public sealed class Utf8String : IEquatable<Utf8String>
+{
+	private readonly byte[] data;
+	private string? cachedString;
+
+	public static Utf8String Empty { get; } = new();
+
+	/// <summary>
+	/// The empty string. A shared instance is available in <see cref="Empty"/>.
+	/// </summary>
+	public Utf8String()
+	{
+		data = Array.Empty<byte>();
+		cachedString = "";
+	}
+
+	public Utf8String(ReadOnlySpan<byte> data) : this(data.ToArray())
+	{
+	}
+
+	private Utf8String(byte[] data)
+	{
+		this.data = data;
+	}
+
+	public Utf8String(string @string)
+	{
+		cachedString = @string;
+		data = Encoding.UTF8.GetBytes(@string);
+	}
+
+	public ReadOnlySpan<byte> Data => data;
+
+	public string String
+	{
+		get
+		{
+			cachedString ??= Encoding.UTF8.GetString(data);
+			return cachedString;
+		}
+	}
+
+	public bool IsEmpty => data.Length == 0;
+
+	public override string ToString() => String;
+
+	public override int GetHashCode()
+	{
+		HashCode hash = new();
+#if NET6_0_OR_GREATER
+		hash.AddBytes(data);
+#else
+		foreach (byte b in data)
+		{
+			hash.Add(b);
+		}
+#endif
+		return hash.ToHashCode();
+	}
+
+	public override bool Equals(object? obj) => Equals(obj as Utf8String);
+
+	public bool Equals(Utf8String? other) => other is not null && Data.SequenceEqual(other.Data);
+
+	public static bool operator ==(Utf8String? string1, Utf8String? string2)
+	{
+		return EqualityComparer<Utf8String>.Default.Equals(string1, string2);
+	}
+	public static bool operator !=(Utf8String? string1, Utf8String? string2) => !(string1 == string2);
+
+	public static bool operator ==(Utf8String? utf8String, string? @string) => utf8String?.String == @string;
+	public static bool operator !=(Utf8String? utf8String, string? @string) => utf8String?.String != @string;
+
+	public static bool operator ==(string? @string, Utf8String? utf8String) => utf8String?.String == @string;
+	public static bool operator !=(string? @string, Utf8String? utf8String) => utf8String?.String != @string;
+
+	[return: NotNullIfNotNull(nameof(@string))]
+	public static implicit operator Utf8String?(string? @string)
+	{
+		return @string is null
+			? null
+			: @string.Length == 0
+				? Empty
+				: new Utf8String(@string);
+	}
+
+	[return: NotNullIfNotNull(nameof(utf8String))]
+	public static implicit operator string?(Utf8String? utf8String)
+	{
+		return utf8String?.String;
+	}
+
+	public static implicit operator Utf8String(ReadOnlySpan<byte> data)
+	{
+		return data.Length == 0 ? Empty : new Utf8String(data);
+	}
+
+	public static implicit operator ReadOnlySpan<byte>(Utf8String? utf8String)
+	{
+		return utf8String is null ? default : utf8String.Data;
+	}
+
+	public static Utf8String operator +(Utf8String? string1, Utf8String? string2)
+	{
+		return Concat(string1, string2);
+	}
+
+	public static Utf8String operator +(Utf8String? string1, ReadOnlySpan<byte> string2)
+	{
+		return string1 is null
+			? string2.Length == 0 ? Empty : new Utf8String(string2)
+			: Concat(string1.Data, string2);
+	}
+
+	public static Utf8String operator +(ReadOnlySpan<byte> string1, Utf8String? string2)
+	{
+		return string2 is null
+			? string1.Length == 0 ? Empty : new Utf8String(string1)
+			: Concat(string1, string2.Data);
+	}
+
+	public static bool IsNullOrEmpty([NotNullWhen(false)] Utf8String? utf8String)
+	{
+		return utf8String is null || utf8String.IsEmpty;
+	}
+
+	public static Utf8String Concat(Utf8String? string1, Utf8String? string2)
+	{
+		if (IsNullOrEmpty(string1))
+		{
+			return string2 ?? Empty;
+		}
+		if (IsNullOrEmpty(string2))
+		{
+			return string1;
+		}
+
+		byte[] data = new byte[string1.data.Length + string2.data.Length];
+		string1.data.CopyTo(data.AsSpan());
+		string2.data.CopyTo(data.AsSpan(string1.data.Length));
+		return new Utf8String(data);
+	}
+
+	public static Utf8String Concat(Utf8String? string1, Utf8String? string2, Utf8String? string3)
+	{
+		if (IsNullOrEmpty(string1))
+		{
+			return Concat(string2, string3);
+		}
+		if (IsNullOrEmpty(string2))
+		{
+			return Concat(string1, string3);
+		}
+		if (IsNullOrEmpty(string3))
+		{
+			return Concat(string1, string2);
+		}
+
+		byte[] data = new byte[string1.data.Length + string2.data.Length + string3.data.Length];
+		string1.data.CopyTo(data.AsSpan());
+		string2.data.CopyTo(data.AsSpan(string1.data.Length));
+		string3.data.CopyTo(data.AsSpan(string1.data.Length + string2.data.Length));
+		return new Utf8String(data);
+	}
+
+	public static Utf8String Concat(Utf8String? string1, Utf8String? string2, Utf8String? string3, Utf8String? string4)
+	{
+		if (IsNullOrEmpty(string1))
+		{
+			return Concat(string2, string3, string4);
+		}
+		if (IsNullOrEmpty(string2))
+		{
+			return Concat(string1, string3, string4);
+		}
+		if (IsNullOrEmpty(string3))
+		{
+			return Concat(string1, string2, string4);
+		}
+		if (IsNullOrEmpty(string4))
+		{
+			return Concat(string1, string2, string3);
+		}
+
+		byte[] data = new byte[string1.data.Length + string2.data.Length + string3.data.Length + string4.data.Length];
+		string1.data.CopyTo(data.AsSpan());
+		string2.data.CopyTo(data.AsSpan(string1.data.Length));
+		string3.data.CopyTo(data.AsSpan(string1.data.Length + string2.data.Length));
+		string4.data.CopyTo(data.AsSpan(string1.data.Length + string2.data.Length + string3.data.Length));
+		return new Utf8String(data);
+	}
+
+	public static Utf8String Concat(params Utf8String?[] values)
+	{
+		if (values is null)
+		{
+			throw new ArgumentNullException(nameof(values));
+		}
+
+		int totalLength = 0;
+		foreach (Utf8String? value in values)
+		{
+			if (value is null)
+			{
+				continue;
+			}
+
+			totalLength += value.data.Length;
+		}
+
+		if (totalLength == 0)
+		{
+			return Empty;
+		}
+
+		byte[] data = new byte[totalLength];
+		int offset = 0;
+		foreach (Utf8String? value in values)
+		{
+			if (value is null)
+			{
+				continue;
+			}
+
+			value.data.CopyTo(data.AsSpan(offset));
+			offset += value.data.Length;
+		}
+
+		return new Utf8String(data);
+	}
+
+	public static Utf8String Concat(ReadOnlySpan<byte> string1, ReadOnlySpan<byte> string2)
+	{
+		if (string1.Length == 0)
+		{
+			return string2.Length == 0 ? Empty : new Utf8String(string2);
+		}
+		if (string2.Length == 0)
+		{
+			return new Utf8String(string1);
+		}
+
+		byte[] data = new byte[string1.Length + string2.Length];
+		string1.CopyTo(data);
+		string2.CopyTo(data.AsSpan(string1.Length));
+		return new Utf8String(data);
+	}
+
+	public static Utf8String Concat(ReadOnlySpan<byte> string1, ReadOnlySpan<byte> string2, ReadOnlySpan<byte> string3)
+	{
+		if (string1.Length == 0)
+		{
+			return Concat(string2, string3);
+		}
+		if (string2.Length == 0)
+		{
+			return Concat(string1, string3);
+		}
+		if (string3.Length == 0)
+		{
+			return Concat(string1, string2);
+		}
+
+		byte[] data = new byte[string1.Length + string2.Length + string3.Length];
+		string1.CopyTo(data);
+		string2.CopyTo(data.AsSpan(string1.Length));
+		string3.CopyTo(data.AsSpan(string1.Length + string2.Length));
+		return new Utf8String(data);
+	}
+
+	public static Utf8String Concat(ReadOnlySpan<byte> string1, ReadOnlySpan<byte> string2, ReadOnlySpan<byte> string3, ReadOnlySpan<byte> string4)
+	{
+		if (string1.Length == 0)
+		{
+			return Concat(string2, string3, string4);
+		}
+		if (string2.Length == 0)
+		{
+			return Concat(string1, string3, string4);
+		}
+		if (string3.Length == 0)
+		{
+			return Concat(string1, string2, string4);
+		}
+		if (string4.Length == 0)
+		{
+			return Concat(string1, string2, string3);
+		}
+
+		byte[] data = new byte[string1.Length + string2.Length + string3.Length + string4.Length];
+		string1.CopyTo(data);
+		string2.CopyTo(data.AsSpan(string1.Length));
+		string3.CopyTo(data.AsSpan(string1.Length + string2.Length));
+		string4.CopyTo(data.AsSpan(string1.Length + string2.Length + string3.Length));
+		return new Utf8String(data);
+	}
+}
+#endif

README.md

@@ -1,8 +1,8 @@
-# AssetRipper.VersionUtilities
+# AssetRipper.Primitives
 
-[![](https://img.shields.io/nuget/v/AssetRipper.VersionUtilities)](https://www.nuget.org/packages/AssetRipper.VersionUtilities)
+[![](https://img.shields.io/nuget/v/AssetRipper.Primitives)](https://www.nuget.org/packages/AssetRipper.Primitives)
 
-Managed library for handling Unity versions
+Managed library for primitive types used in AssetRipper projects.
 
 # Legal Disclaimers
 

VersionUtilities.Tests/UnityVersionTests.cs

@@ -1,39 +0,0 @@
-using NUnit.Framework;
-
-namespace AssetRipper.VersionUtilities.Tests
-{
-	public class ParsingTests
-	{
-		[Test]
-		public void UnityVersionParsesCorrectly()
-		{
-			string version = "2343.4.5f7";
-			UnityVersion expected = new UnityVersion(2343, 4, 5, UnityVersionType.Final, 7);
-			Assert.AreEqual(expected, UnityVersion.Parse(version));
-		}
-
-		[Test]
-		public void UnityVersionParsesDllCorrectly()
-		{
-			string dllName = "_2343_4_5f7.dll";
-			UnityVersion expected = new UnityVersion(2343, 4, 5, UnityVersionType.Final, 7);
-			Assert.AreEqual(expected, UnityVersion.ParseFromDllName(dllName));
-		}
-
-		[Test]
-		public void UnityVersionParsesDllCorrectlyWithoutExtension()
-		{
-			string dllName = "_2343_4_5f7";
-			UnityVersion expected = new UnityVersion(2343, 4, 5, UnityVersionType.Final, 7);
-			Assert.AreEqual(expected, UnityVersion.ParseFromDllName(dllName));
-		}
-
-		[Test]
-		public void UnityVersionParsesDllCorrectlyWithoutLeadingUnderscore()
-		{
-			string dllName = "2343_4_5f7.dll";
-			UnityVersion expected = new UnityVersion(2343, 4, 5, UnityVersionType.Final, 7);
-			Assert.AreEqual(expected, UnityVersion.ParseFromDllName(dllName));
-		}
-	}
-}

VersionUtilities.Tests/VersionUtilities.Tests.csproj

@@ -1,24 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-	<PropertyGroup>
-		<TargetFrameworks>netframework3.5;netframework4.0;netframework4.8;net5.0;net6.0</TargetFrameworks>
-		<LangVersion>Latest</LangVersion>
-		<Nullable>enable</Nullable>
-		<ImplicitUsings>disable</ImplicitUsings>
-		<RootNamespace>AssetRipper.VersionUtilities.Tests</RootNamespace>
-
-		<IsPackable>false</IsPackable>
-	</PropertyGroup>
-
-	<ItemGroup>
-		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.9.4" />
-		<PackageReference Include="NUnit" Version="3.13.1" />
-		<PackageReference Include="NUnit3TestAdapter" Version="3.17.0" />
-		<PackageReference Include="coverlet.collector" Version="3.0.2" />
-	</ItemGroup>
-
-	<ItemGroup>
-	  <ProjectReference Include="..\VersionUtilities\VersionUtilities.csproj" />
-	</ItemGroup>
-
-</Project>

VersionUtilities.sln

@@ -1,46 +0,0 @@
-
-Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio Version 17
-VisualStudioVersion = 17.0.32112.339
-MinimumVisualStudioVersion = 10.0.40219.1
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "VersionUtilities", "VersionUtilities\VersionUtilities.csproj", "{5628CFCF-F89B-4191-808C-5EE5FB327B63}"
-EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "VersionUtilities.Tests", "VersionUtilities.Tests\VersionUtilities.Tests.csproj", "{451F668C-6079-40FD-A79B-96A2CA0C5AAC}"
-EndProject
-Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution Items", "{36D291AB-E468-4CE7-8DB3-2C46639FE5AE}"
-	ProjectSection(SolutionItems) = preProject
-		.gitignore = .gitignore
-		License.md = License.md
-		README.md = README.md
-	EndProjectSection
-EndProject
-Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Licenses", "Licenses", "{4BE414B8-5B2D-40C1-BA3E-7DBBD6F7D854}"
-	ProjectSection(SolutionItems) = preProject
-		Licenses\uTinyRipper.md = Licenses\uTinyRipper.md
-	EndProjectSection
-EndProject
-Global
-	GlobalSection(SolutionConfigurationPlatforms) = preSolution
-		Debug|Any CPU = Debug|Any CPU
-		Release|Any CPU = Release|Any CPU
-	EndGlobalSection
-	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{5628CFCF-F89B-4191-808C-5EE5FB327B63}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{5628CFCF-F89B-4191-808C-5EE5FB327B63}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{5628CFCF-F89B-4191-808C-5EE5FB327B63}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{5628CFCF-F89B-4191-808C-5EE5FB327B63}.Release|Any CPU.Build.0 = Release|Any CPU
-		{451F668C-6079-40FD-A79B-96A2CA0C5AAC}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{451F668C-6079-40FD-A79B-96A2CA0C5AAC}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{451F668C-6079-40FD-A79B-96A2CA0C5AAC}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{451F668C-6079-40FD-A79B-96A2CA0C5AAC}.Release|Any CPU.Build.0 = Release|Any CPU
-	EndGlobalSection
-	GlobalSection(SolutionProperties) = preSolution
-		HideSolutionNode = FALSE
-	EndGlobalSection
-	GlobalSection(NestedProjects) = preSolution
-		{4BE414B8-5B2D-40C1-BA3E-7DBBD6F7D854} = {36D291AB-E468-4CE7-8DB3-2C46639FE5AE}
-	EndGlobalSection
-	GlobalSection(ExtensibilityGlobals) = postSolution
-		SolutionGuid = {370218F4-B218-4C62-B7F7-D03B799F6349}
-	EndGlobalSection
-EndGlobal

VersionUtilities/CharacterExtensions.cs

@@ -1,26 +0,0 @@
-using System;
-
-namespace AssetRipper.VersionUtilities
-{
-	internal static class CharacterExtensions
-	{
-		public static int ParseDigit(this char _this)
-		{
-			return _this - '0';
-		}
-
-		public static UnityVersionType ToUnityVersionType(this char _this)
-		{
-			return _this switch
-			{
-				'a' => UnityVersionType.Alpha,
-				'b' => UnityVersionType.Beta,
-				'c' => UnityVersionType.China,
-				'f' => UnityVersionType.Final,
-				'p' => UnityVersionType.Patch,
-				'x' => UnityVersionType.Experimental,
-				_ => throw new Exception($"Unsupported version type {_this}"),
-			};
-		}
-	}
-}

VersionUtilities/UnityVersion.ComparisonMethods.cs

@@ -1,71 +0,0 @@
-namespace AssetRipper.VersionUtilities
-{
-	public readonly partial struct UnityVersion
-	{
-#pragma warning disable CS1591 // Missing XML comment for publicly visible type or member
-		public bool IsEqual(int major) => this == From(major);
-		public bool IsEqual(int major, int minor) => this == From(major, minor);
-		public bool IsEqual(int major, int minor, int build) => this == From(major, minor, build);
-		public bool IsEqual(int major, int minor, int build, UnityVersionType type) => this == From(major, minor, build, type);
-		public bool IsEqual(int major, int minor, int build, UnityVersionType type, int typeNumber) => this == new UnityVersion(major, minor, build, type, typeNumber);
-		public bool IsEqual(string version) => this == Parse(version);
-
-		public bool IsLess(int major) => this < From(major);
-		public bool IsLess(int major, int minor) => this < From(major, minor);
-		public bool IsLess(int major, int minor, int build) => this < From(major, minor, build);
-		public bool IsLess(int major, int minor, int build, UnityVersionType type) => this < From(major, minor, build, type);
-		public bool IsLess(int major, int minor, int build, UnityVersionType type, int typeNumber) => this < new UnityVersion(major, minor, build, type, typeNumber);
-		public bool IsLess(string version) => this < Parse(version);
-
-		public bool IsLessEqual(int major) => this <= From(major);
-		public bool IsLessEqual(int major, int minor) => this <= From(major, minor);
-		public bool IsLessEqual(int major, int minor, int build) => this <= From(major, minor, build);
-		public bool IsLessEqual(int major, int minor, int build, UnityVersionType type) => this <= From(major, minor, build, type);
-		public bool IsLessEqual(int major, int minor, int build, UnityVersionType type, int typeNumber) => this <= new UnityVersion(major, minor, build, type, typeNumber);
-		public bool IsLessEqual(string version) => this <= Parse(version);
-
-		public bool IsGreater(int major) => this > From(major);
-		public bool IsGreater(int major, int minor) => this > From(major, minor);
-		public bool IsGreater(int major, int minor, int build) => this > From(major, minor, build);
-		public bool IsGreater(int major, int minor, int build, UnityVersionType type) => this > From(major, minor, build, type);
-		public bool IsGreater(int major, int minor, int build, UnityVersionType type, int typeNumber) => this > new UnityVersion(major, minor, build, type, typeNumber);
-		public bool IsGreater(string version) => this > Parse(version);
-
-		public bool IsGreaterEqual(int major) => this >= From(major);
-		public bool IsGreaterEqual(int major, int minor) => this >= From(major, minor);
-		public bool IsGreaterEqual(int major, int minor, int build) => this >= From(major, minor, build);
-		public bool IsGreaterEqual(int major, int minor, int build, UnityVersionType type) => this >= From(major, minor, build, type);
-		public bool IsGreaterEqual(int major, int minor, int build, UnityVersionType type, int typeNumber) => this >= new UnityVersion(major, minor, build, type, typeNumber);
-		public bool IsGreaterEqual(string version) => this >= Parse(version);
-		
-		private UnityVersion From(int major)
-		{
-			ulong data = ((ulong)(major & 0xFFFF) << 48) | (0x0000FFFFFFFFFFFFUL & m_data);
-			return new UnityVersion(data);
-		}
-		private UnityVersion From(int major, int minor)
-		{
-			ulong data = ((ulong)(major & 0xFFFF) << 48) | ((ulong)(minor & 0xFF) << 40) | (0x000000FFFFFFFFFFUL & m_data);
-			return new UnityVersion(data);
-		}
-		private UnityVersion From(int major, int minor, int build)
-		{
-			ulong data = ((ulong)(major & 0xFFFF) << 48) | ((ulong)(minor & 0xFF) << 40) | ((ulong)(build & 0xFF) << 32) |
-				(0x00000000FFFFFFFFUL & m_data);
-			return new UnityVersion(data);
-		}
-		private UnityVersion From(int major, int minor, int build, UnityVersionType type)
-		{
-			ulong data = ((ulong)(major & 0xFFFF) << 48) | ((ulong)(minor & 0xFF) << 40) | ((ulong)(build & 0xFF) << 32) |
-				((ulong)((int)type & 0xFF) << 24) | (0x0000000000FFFFFFUL & m_data);
-			return new UnityVersion(data);
-		}
-		private UnityVersion From(int major, int minor, int build, UnityVersionType type, int typeNumber)
-		{
-			ulong data = ((ulong)(major & 0xFFFF) << 48) | ((ulong)(minor & 0xFF) << 40) | ((ulong)(build & 0xFF) << 32)
-				| ((ulong)((int)type & 0xFF) << 24) | ((ulong)(typeNumber & 0xFF) << 16) | (0x000000000000FFFFUL & m_data);
-			return new UnityVersion(data);
-		}
-#pragma warning restore CS1591 // Missing XML comment for publicly visible type or member
-	}
-}

VersionUtilities/UnityVersion.Interfaces.cs

@@ -1,63 +0,0 @@
-using System;
-
-namespace AssetRipper.VersionUtilities
-{
-	public readonly partial struct UnityVersion : IEquatable<UnityVersion>, IComparable, IComparable<UnityVersion>
-	{
-		/// <summary>
-		/// Compare to another object
-		/// </summary>
-		/// <param name="obj">Another object</param>
-		/// <returns>
-		/// 1 if this is larger or the other is not a Unity version<br/>
-		/// -1 if this is smaller<br/>
-		/// 0 if equal
-		/// </returns>
-		public int CompareTo(object? obj)
-		{
-			return obj is UnityVersion version ? CompareTo(version) : 1;
-		}
-
-		/// <summary>
-		/// Compare two Unity versions
-		/// </summary>
-		/// <param name="other">Another Unity version</param>
-		/// <returns>
-		/// 1 if this is larger<br/>
-		/// -1 if this is smaller<br/>
-		/// 0 if equal
-		/// </returns>
-		public int CompareTo(UnityVersion other)
-		{
-			if (this > other)
-				return 1;
-			else if (this < other)
-				return -1;
-			else
-				return 0;
-		}
-
-		/// <summary>
-		/// Check equality with another object
-		/// </summary>
-		/// <param name="obj">Another object</param>
-		/// <returns>True if they're equal; false otherwise</returns>
-		public override bool Equals(object? obj)
-		{
-			return obj is UnityVersion version && this == version;
-		}
-
-		/// <summary>
-		/// Check equality with another Unity version
-		/// </summary>
-		/// <param name="other">Another Unity version</param>
-		/// <returns>True if they're equal; false otherwise</returns>
-		public bool Equals(UnityVersion other) => this == other;
-
-		/// <inheritdoc/>
-		public override int GetHashCode()
-		{
-			return unchecked(827 + 911 * m_data.GetHashCode());
-		}
-	}
-}

VersionUtilities/UnityVersion.MathMethods.cs

@@ -1,47 +0,0 @@
-namespace AssetRipper.VersionUtilities
-{
-	public readonly partial struct UnityVersion
-	{
-		/// <summary>
-		/// A maximizing function for Unity versions
-		/// </summary>
-		/// <param name="left">A Unity version</param>
-		/// <param name="right">A Unity version</param>
-		/// <returns>The larger Unity version</returns>
-		public static UnityVersion Max(UnityVersion left, UnityVersion right)
-		{
-			return left > right ? left : right;
-		}
-
-		/// <summary>
-		/// A minimizing function for Unity versions
-		/// </summary>
-		/// <param name="left">A Unity version</param>
-		/// <param name="right">A Unity version</param>
-		/// <returns>The smaller Unity version</returns>
-		public static UnityVersion Min(UnityVersion left, UnityVersion right)
-		{
-			return left < right ? left : right;
-		}
-
-		/// <summary>
-		/// A distance function for measuring version proximity
-		/// </summary>
-		/// <remarks>
-		/// The returned value is ordinal and should not be saved anywhere.
-		/// It's only for runtime comparisons, such as finding the closest version in a list.
-		/// </remarks>
-		/// <param name="left">A Unity version</param>
-		/// <param name="right">A Unity version</param>
-		/// <returns>
-		/// An ordinal number representing the distance between 2 versions. 
-		/// A value of zero means they're equal.
-		/// </returns>
-		public static ulong Distance(UnityVersion left, UnityVersion right)
-		{
-			return left.m_data < right.m_data 
-				? right.m_data - left.m_data 
-				: left.m_data - right.m_data;
-		}
-	}
-}

VersionUtilities/UnityVersion.Operators.cs

@@ -1,71 +0,0 @@
-namespace AssetRipper.VersionUtilities
-{
-	public readonly partial struct UnityVersion
-	{
-		/// <summary>
-		/// Equality operator
-		/// </summary>
-		/// <param name="left">The left Unity version</param>
-		/// <param name="right">The right Unity version</param>
-		/// <returns></returns>
-		public static bool operator ==(UnityVersion left, UnityVersion right)
-		{
-			return left.m_data == right.m_data;
-		}
-
-		/// <summary>
-		/// Inequality operator
-		/// </summary>
-		/// <param name="left">The left Unity version</param>
-		/// <param name="right">The right Unity version</param>
-		/// <returns></returns>
-		public static bool operator !=(UnityVersion left, UnityVersion right)
-		{
-			return left.m_data != right.m_data;
-		}
-
-		/// <summary>
-		/// Greater than
-		/// </summary>
-		/// <param name="left">The left Unity version</param>
-		/// <param name="right">The right Unity version</param>
-		/// <returns></returns>
-		public static bool operator >(UnityVersion left, UnityVersion right)
-		{
-			return left.m_data > right.m_data;
-		}
-
-		/// <summary>
-		/// Greater than or equal to
-		/// </summary>
-		/// <param name="left">The left Unity version</param>
-		/// <param name="right">The right Unity version</param>
-		/// <returns></returns>
-		public static bool operator >=(UnityVersion left, UnityVersion right)
-		{
-			return left.m_data >= right.m_data;
-		}
-
-		/// <summary>
-		/// Less than
-		/// </summary>
-		/// <param name="left">The left Unity version</param>
-		/// <param name="right">The right Unity version</param>
-		/// <returns></returns>
-		public static bool operator <(UnityVersion left, UnityVersion right)
-		{
-			return left.m_data < right.m_data;
-		}
-
-		/// <summary>
-		/// Less than or equal to
-		/// </summary>
-		/// <param name="left">The left Unity version</param>
-		/// <param name="right">The right Unity version</param>
-		/// <returns></returns>
-		public static bool operator <=(UnityVersion left, UnityVersion right)
-		{
-			return left.m_data <= right.m_data;
-		}
-	}
-}

VersionUtilities/UnityVersion.Parsing.cs

@@ -1,158 +0,0 @@
-using System;
-using System.IO;
-using System.Text;
-
-namespace AssetRipper.VersionUtilities
-{
-	public readonly partial struct UnityVersion
-	{
-		/// <summary>
-		/// Serialize the version as a string
-		/// </summary>
-		/// <returns>A new string like 2019.4.3f1</returns>
-		public override string ToString()
-		{
-			return $"{Major}.{Minor}.{Build}{Type.ToLiteral()}{TypeNumber}";
-		}
-
-		/// <summary>
-		/// Serialize the version as a string
-		/// </summary>
-		/// <param name="hasUnderscorePrefix">Include the _ prefix</param>
-		/// <param name="useUnderscores">Use underscores as separators instead of periods</param>
-		/// <param name="hasExtension">Include the .dll extension</param>
-		/// <returns>A new string generated with those parameters</returns>
-		public string ToString(bool hasUnderscorePrefix, bool useUnderscores, bool hasExtension)
-		{
-			StringBuilder sb = new StringBuilder();
-
-			char separator = useUnderscores ? '_' : '.';
-
-			if(hasUnderscorePrefix)
-				sb.Append('_');
-
-			sb.Append(Major);
-			sb.Append(separator);
-			sb.Append(Minor);
-			sb.Append(separator);
-			sb.Append(Build);
-			sb.Append(separator);
-			sb.Append(Type.ToLiteral());
-			sb.Append(TypeNumber);
-			
-			if(hasExtension)
-				sb.Append(".dll");
-
-			return sb.ToString();
-		}
-
-		/// <summary>
-		/// Parse a dll name like _2019_4_3f1.dll
-		/// </summary>
-		/// <param name="dllName">The name of a dll file</param>
-		/// <returns>The parsed Unity version</returns>
-		/// <exception cref="ArgumentNullException">If the string is null or empty</exception>
-		public static UnityVersion ParseFromDllName(string dllName)
-		{
-			if (string.IsNullOrEmpty(dllName))
-			{
-				throw new ArgumentNullException(nameof(dllName));
-			}
-			if (dllName[0] == '_')
-			{
-				dllName = dllName.Substring(1);
-			}
-
-			return Parse(dllName.Replace('_', '.').Replace(".dll", ""));
-		}
-
-		/// <summary>
-		/// Parse a normal Unity version string
-		/// </summary>
-		/// <param name="version">A string to parse</param>
-		/// <returns>The parsed Unity version</returns>
-		/// <exception cref="ArgumentNullException">If the string is null or empty</exception>
-		/// <exception cref="ArgumentException">If the string is in an invalid format</exception>
-		public static UnityVersion Parse(string version)
-		{
-			if (string.IsNullOrEmpty(version))
-			{
-				throw new ArgumentNullException(nameof(version));
-			}
-
-			int major = 0;
-			int minor = 0;
-			int build = 0;
-			UnityVersionType versionType = UnityVersionType.Final;
-			int typeNumber = 0;
-
-			using StringReader reader = new StringReader(version);
-
-			while (true)
-			{
-				int symb = reader.Read();
-				if (symb == -1)
-				{
-					throw new ArgumentException($"Invalid version formatting: {version}", nameof(version));
-				}
-				char c = (char)symb;
-				if (c == '.')
-				{
-					break;
-				}
-
-				major = major * 10 + c.ParseDigit();
-			}
-
-			while (true)
-			{
-				int symb = reader.Read();
-				if (symb == -1)
-				{
-					break;
-				}
-				char c = (char)symb;
-				if (c == '.')
-				{
-					break;
-				}
-
-				minor = minor * 10 + c.ParseDigit();
-			}
-
-			while (true)
-			{
-				int symb = reader.Read();
-				if (symb == -1)
-				{
-					break;
-				}
-
-				char c = (char)symb;
-				if (char.IsDigit(c))
-				{
-					build = build * 10 + c.ParseDigit();
-				}
-				else
-				{
-					versionType = c.ToUnityVersionType();
-					break;
-				}
-			}
-
-			while (true)
-			{
-				int symb = reader.Read();
-				if (symb == -1)
-				{
-					break;
-				}
-
-				char c = (char)symb;
-				typeNumber = typeNumber * 10 + c.ParseDigit();
-			}
-
-			return new UnityVersion(major, minor, build, versionType, typeNumber);
-		}
-	}
-}

VersionUtilities/UnityVersion.cs

@@ -1,92 +0,0 @@
-namespace AssetRipper.VersionUtilities
-{
-	/// <summary>
-	/// A value type for holding Unity versions
-	/// </summary>
-	public readonly partial struct UnityVersion
-	{
-		private readonly ulong m_data;
-
-		/// <summary>
-		/// The first number in a Unity version string
-		/// </summary>
-		public int Major => unchecked((int)((m_data >> 48) & 0xFFFFUL));
-
-		/// <summary>
-		/// The second number in a Unity version string
-		/// </summary>
-		public int Minor => unchecked((int)((m_data >> 40) & 0xFFUL));
-
-		/// <summary>
-		/// The third number in a Unity version string
-		/// </summary>
-		public int Build => unchecked((int)((m_data >> 32) & 0xFFUL));
-
-		/// <summary>
-		/// The letter in a Unity version string
-		/// </summary>
-		public UnityVersionType Type => (UnityVersionType)unchecked((int)((m_data >> 24) & 0xFFUL));
-
-		/// <summary>
-		/// The last number in a Unity version string
-		/// </summary>
-		public int TypeNumber => unchecked((int)((m_data >> 16) & 0xFFUL));
-
-		/// <summary>
-		/// The minimum value this type can have
-		/// </summary>
-		public static UnityVersion MinVersion { get; } = new UnityVersion(0UL);
-
-		/// <summary>
-		/// The maximum value this type can have
-		/// </summary>
-		public static UnityVersion MaxVersion { get; } = new UnityVersion(ulong.MaxValue);
-
-		/// <summary>
-		/// Construct a new Unity version
-		/// </summary>
-		public UnityVersion(int major)
-		{
-			m_data = (ulong)(major & 0xFFFF) << 48;
-		}
-
-		/// <summary>
-		/// Construct a new Unity version
-		/// </summary>
-		public UnityVersion(int major, int minor)
-		{
-			m_data = ((ulong)(major & 0xFFFF) << 48) | ((ulong)(minor & 0xFF) << 40);
-		}
-
-		/// <summary>
-		/// Construct a new Unity version
-		/// </summary>
-		public UnityVersion(int major, int minor, int build)
-		{
-			m_data = ((ulong)(major & 0xFFFF) << 48) | ((ulong)(minor & 0xFF) << 40) | ((ulong)(build & 0xFF) << 32);
-		}
-
-		/// <summary>
-		/// Construct a new Unity version
-		/// </summary>
-		public UnityVersion(int major, int minor, int build, UnityVersionType type)
-		{
-			m_data = ((ulong)(major & 0xFFFF) << 48) | ((ulong)(minor & 0xFF) << 40) | ((ulong)(build & 0xFF) << 32)
-				| ((ulong)((int)type & 0xFF) << 24);
-		}
-
-		/// <summary>
-		/// Construct a new Unity version
-		/// </summary>
-		public UnityVersion(int major, int minor, int build, UnityVersionType type, int typeNumber)
-		{
-			m_data = ((ulong)(major & 0xFFFF) << 48) | ((ulong)(minor & 0xFF) << 40) | ((ulong)(build & 0xFF) << 32)
-				| ((ulong)((int)type & 0xFF) << 24) | ((ulong)(typeNumber & 0xFF) << 16);
-		}
-
-		private UnityVersion(ulong data)
-		{
-			m_data = data;
-		}
-	}
-}

VersionUtilities/UnityVersionType.cs

@@ -1,70 +0,0 @@
-using System;
-
-namespace AssetRipper.VersionUtilities
-{
-	/// <summary>
-	/// An enumeration representing the letter in a Unity Version string
-	/// </summary>
-	public enum UnityVersionType
-	{
-		/// <summary>
-		/// a
-		/// </summary>
-		Alpha = 0,
-		/// <summary>
-		/// b
-		/// </summary>
-		Beta,
-		/// <summary>
-		/// c
-		/// </summary>
-		China,
-		/// <summary>
-		/// f
-		/// </summary>
-		Final,
-		/// <summary>
-		/// p
-		/// </summary>
-		Patch,
-		/// <summary>
-		/// x
-		/// </summary>
-		Experimental,
-
-		/// <summary>
-		/// The minimum valid value for this enumeration
-		/// </summary>
-		MinValue = Alpha,
-		/// <summary>
-		/// The maximum valid value for this enumeration
-		/// </summary>
-		MaxValue = Experimental,
-	}
-
-	/// <summary>
-	/// Extension methods for <see cref="UnityVersionType"/>
-	/// </summary>
-	public static class UnityVersionTypeExtentions
-	{
-		/// <summary>
-		/// Convert to the relevant character
-		/// </summary>
-		/// <param name="_this">A Unity version type</param>
-		/// <returns>The character this value represents</returns>
-		/// <exception cref="ArgumentOutOfRangeException">The type is not a valid value</exception>
-		public static char ToLiteral(this UnityVersionType _this)
-		{
-			return _this switch
-			{
-				UnityVersionType.Alpha => 'a',
-				UnityVersionType.Beta => 'b',
-				UnityVersionType.China => 'c',
-				UnityVersionType.Final => 'f',
-				UnityVersionType.Patch => 'p',
-				UnityVersionType.Experimental => 'x',
-				_ => throw new ArgumentOutOfRangeException(nameof(_this), $"Unsupported version type {_this}"),
-			};
-		}
-	}
-}

VersionUtilities/VersionUtilities.csproj

@@ -1,26 +0,0 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-	<PropertyGroup>
-		<TargetFrameworks>netframework3.5;netframework4.0;netstandard2.0;net5.0;net6.0</TargetFrameworks>
-		<LangVersion>Latest</LangVersion>
-		<Nullable>enable</Nullable>
-		<ImplicitUsings>disable</ImplicitUsings>
-		<RootNamespace>AssetRipper.VersionUtilities</RootNamespace>
-		<Authors>ds5678</Authors>
-		<Company>AssetRipper</Company>
-		<Version>1.0.0.0</Version>
-		<AssemblyVersion>1.0.0.0</AssemblyVersion>
-		<PackageId>AssetRipper.VersionUtilities</PackageId>
-		<PackageTags>C# version unity unity3d</PackageTags>
-		<RepositoryUrl>https://github.com/AssetRipper/VersionUtilities</RepositoryUrl>
-		<PackageLicenseExpression>MIT</PackageLicenseExpression>
-		<RepositoryType>git</RepositoryType>
-		<PackageProjectUrl>https://github.com/AssetRipper/VersionUtilities</PackageProjectUrl>
-		<Copyright>Copyright (c) 2022 ds5678</Copyright>
-		<Description>Managed library for handling Unity versions</Description>
-		<GeneratePackageOnBuild>true</GeneratePackageOnBuild>
-		<GenerateDocumentationFile>true</GenerateDocumentationFile>
-		<DocumentationFile>bin\VersionUtilities.xml</DocumentationFile>
-	</PropertyGroup>
-
-</Project>