.net Standard 2.0 (#652)

* create snk for signing * use source of hashcode to allow .net standard 2.0 * use .net standard 2.0
AngusJohnson · Oct 1, 2023 · 99eaaf1 · 99eaaf1
1 parent 8a3484f
commit 99eaaf1
Show file tree

Hide file tree

Showing 4 changed files with 156 additions and 30 deletions.
diff --git a/CSharp/Clipper2Lib/Clipper2Lib.csproj b/CSharp/Clipper2Lib/Clipper2Lib.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>netstandard2.1</TargetFramework>
+    <TargetFramework>netstandard2.0</TargetFramework>
     <Nullable>enable</Nullable>
     <LangVersion>8</LangVersion>
     <GeneratePackageOnBuild>True</GeneratePackageOnBuild>

diff --git a/CSharp/Clipper2Lib/HashCode.cs b/CSharp/Clipper2Lib/HashCode.cs
@@ -0,0 +1,126 @@
+using System;
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+using System.Security.Cryptography;
+
+namespace Clipper2Lib
+{
+  /*
+
+  Licensed to the .NET Foundation under one or more agreements.
+  // The .NET Foundation licenses this file to you under the MIT license.
+
+  The xxHash32 implementation is based on the code published by Yann Collet:
+  https://raw.githubusercontent.com/Cyan4973/xxHash/5c174cfa4e45a42f94082dc0d4539b39696afea1/xxhash.c
+
+    xxHash - Fast Hash algorithm
+    Copyright (C) 2012-2016, Yann Collet
+
+    BSD 2-Clause License (http://www.opensource.org/licenses/bsd-license.php)
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions are
+    met:
+
+    * Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above
+    copyright notice, this list of conditions and the following disclaimer
+    in the documentation and/or other materials provided with the
+    distribution.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+    A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+    OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+    SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+    LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+    DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+    OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+    You can contact the author at :
+    - xxHash homepage: http://www.xxhash.com
+    - xxHash source repository : https://github.com/Cyan4973/xxHash
+  */
+
+  public struct HashCode
+  {
+    private static readonly uint s_seed = GenerateGlobalSeed();
+
+    private const uint Prime1 = 2654435761U;
+    private const uint Prime2 = 2246822519U;
+    private const uint Prime3 = 3266489917U;
+    private const uint Prime4 = 668265263U;
+    private const uint Prime5 = 374761393U;
+
+    private static uint GenerateGlobalSeed()
+    {
+      using RandomNumberGenerator randomNumberGenerator = RandomNumberGenerator.Create();
+      byte[] data = new byte[sizeof(uint)];
+      randomNumberGenerator.GetBytes(data);
+      return BitConverter.ToUInt32(data, 0);
+    }
+
+    public static int Combine<T1, T2>(T1 value1, T2 value2)
+    {
+      uint hc1 = (uint) (value1?.GetHashCode() ?? 0);
+      uint hc2 = (uint) (value2?.GetHashCode() ?? 0);
+
+      uint hash = MixEmptyState();
+      hash += 8;
+
+      hash = QueueRound(hash, hc1);
+      hash = QueueRound(hash, hc2);
+
+      hash = MixFinal(hash);
+      return (int) hash;
+    }
+
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    private static uint QueueRound(uint hash, uint queuedValue)
+    {
+      return RotateLeft(hash + (queuedValue * Prime3), 17) * Prime4;
+    }
+
+    private static uint MixEmptyState()
+    {
+      return s_seed + Prime5;
+    }
+
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    private static uint MixFinal(uint hash)
+    {
+      hash ^= hash >> 15;
+      hash *= Prime2;
+      hash ^= hash >> 13;
+      hash *= Prime3;
+      hash ^= hash >> 16;
+      return hash;
+    }
+
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public static uint RotateLeft(uint value, int offset)
+    {
+      return (value << offset) | (value >> (32 - offset));
+    }
+
+#pragma warning disable CS0809 // Obsolete member overrides non-obsolete member
+    [Obsolete("HashCode is a mutable struct and should not be compared with other HashCodes. Use ToHashCode to retrieve the computed hash code.", error: true)]
+    [EditorBrowsable(EditorBrowsableState.Never)]
+    public override int GetHashCode()
+    {
+      throw new NotSupportedException($"{nameof(HashCode)}.{nameof(GetHashCode)}() is not supported");
+    }
+
+    [Obsolete("HashCode is a mutable struct and should not be compared with other HashCodes.", error: true)]
+    [EditorBrowsable(EditorBrowsableState.Never)]
+    public override bool Equals(object? obj)
+    {
+      throw new NotSupportedException($"{nameof(HashCode)}.{nameof(Equals)}() is not supported");
+    }
+#pragma warning restore CS0809 // Obsolete member overrides non-obsolete member
+  }
+}
diff --git a/CSharp/Utils/ClipFileIO/Clipper.FileIO.csproj b/CSharp/Utils/ClipFileIO/Clipper.FileIO.csproj
@@ -1,15 +1,15 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <TargetFramework>netstandard2.1</TargetFramework>
-    <Nullable>enable</Nullable>
-    <LangVersion>8</LangVersion>
-    <Platforms>AnyCPU;x86</Platforms>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <ProjectReference Include="..\..\Clipper2Lib\Clipper2Lib.csproj" />
-    <ProjectReference Include="..\SVG\Clipper2.SVG.csproj" />
-  </ItemGroup>
-
-</Project>
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netstandard2.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <LangVersion>8</LangVersion>
+    <Platforms>AnyCPU;x86</Platforms>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\Clipper2Lib\Clipper2Lib.csproj" />
+    <ProjectReference Include="..\SVG\Clipper2.SVG.csproj" />
+  </ItemGroup>
+
+</Project>
diff --git a/CSharp/Utils/SVG/Clipper2.SVG.csproj b/CSharp/Utils/SVG/Clipper2.SVG.csproj
@@ -1,14 +1,14 @@
-<Project Sdk="Microsoft.NET.Sdk">
-
-  <PropertyGroup>
-    <TargetFramework>netstandard2.1</TargetFramework>
-    <Nullable>enable</Nullable>
-    <LangVersion>8</LangVersion>
-    <Platforms>AnyCPU;x86</Platforms>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <ProjectReference Include="..\..\Clipper2Lib\Clipper2Lib.csproj" />
-  </ItemGroup>
-
-</Project>
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netstandard2.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <LangVersion>8</LangVersion>
+    <Platforms>AnyCPU;x86</Platforms>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\Clipper2Lib\Clipper2Lib.csproj" />
+  </ItemGroup>
+
+</Project>