Begin csharp port

.github/workflows/on_push.yml

@@ -109,7 +109,6 @@ jobs:
 
   c:
     strategy:
-      fail-fast: false
       matrix:
 #         compiler: ["llvm", "gcc"]
 #         # compiler targets (ideally): clang, gcc, MSVCC, pcc, tcc, icc, 
@@ -144,3 +143,32 @@ jobs:
 
     - name: Run tests
       run: make ctest
+
+  csharp:
+    strategy:
+      fail-fast: false
+      matrix:
+        net_version: [5, 6, 7, 8]
+        os: [ubuntu-latest, windows-latest]
+        include:
+        - net_version: 8
+          os: macos-latest
+        - net_version: 8
+          os: macos-13
+    runs-on: ${{ matrix.os }}
+
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Setup .NET ${{ matrix.net_version }}
+      uses: actions/setup-dotnet@v3
+      with:
+        dotnet-version: ${{ matrix.net_version }}
+        cache: true
+        cache-dependency-path: 'csharp/packages.lock.json'
+
+    - name: Dependencies
+      run: make csdependencies
+
+    - name: Run Tests
+      run: make cstest

Makefile

@@ -7,8 +7,11 @@ py%:
 c%:
 	cd c && $(MAKE) $* $(MFLAGS)
 
+cs%:
+	cd csharp && $(MAKE) $* $(MFLAGS)
+
 js%:
 	cd javascript && $(MAKE) $* $(MFLAGS)
 
 %:
-	$(MAKE) c$* js$* py$* $(MFLAGS)
+	$(MAKE) c$* cs$* js$* py$* $(MFLAGS)

csharp/Makefile

@@ -0,0 +1,10 @@
+test: dependencies
+	dotnet test
+
+test_%: dependencies
+	echo "WARNING: multithreaded tests not supported on javascript"
+	$(MAKE) test
+
+dependencies:
+	dotnet restore
+

csharp/README.md

@@ -0,0 +1,41 @@
+# C# Section
+
+All problems are solved in .NET 6, though an effort is made to support other versions.
+
+## Organization
+
+All C# files share a common prefix with their problem number. All shared functions are defined in the include folder.
+
+## Makefile
+
+There are two main recipes in this Makefile
+
+### dependencies
+
+This recipe installs all the required and test dependencies. See the Dependencies section for more info
+
+### test
+
+This recipe runs tests in multiple threads
+
+## Tests
+
+### Prime Infrastructure Test
+
+This test checks five things:
+
+1. It checks `is_prime()` for numbers up to `MAX_PRIME`, where that is defined in the test
+2. It checks that `is_composite()` returns truthy values on composites in that range, and falsey values on primes
+3. It checks that `is_composite()` returns the smallest prime factor on composite numbers
+4. It checks that the prime numbers are generated in the correct order
+5. It checks that all these operations are completed in less than 200ns * `MAX_PRIME`
+
+### Generic Problems
+
+For each problem it will check the answer against a known dictionary. If the problem is not in the "known slow" category (meaning that I generate the correct answer with a poor solution), it will run it as many times as the benchmark plugin wants. Otherwise it is run exactly once.
+
+A test fails if it gets the wrong answer or if it takes more than 1 minute.
+
+## Dependencies
+
+I try to keep the dependencies of this project as small as possible, except for test plugins. At the moment there are no non-test dependencies for this section.

csharp/csharp.csproj

@@ -0,0 +1,27 @@
+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <DockerDefaultTargetOS>Linux</DockerDefaultTargetOS>
+    <DockerfileContext>.</DockerfileContext>
+    <RestorePackagesWithLockFile>true</RestorePackagesWithLockFile>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
+    <PackageReference Include="Moq" Version="4.20.70" />
+    <PackageReference Include="xunit" Version="2.8.0" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="6.0.21" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="6.0.21">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="6.0.21">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
+  </ItemGroup>
+
+</Project>