Add project files.

Author: JunaMeinhold

Generator/Generator.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="HexaGen" Version="1.1.15-rc30" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <None Update="generator.json">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
+    <None Update="include\zconf.h">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
+    <None Update="include\zlib.h">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
+
+</Project>

Generator/Program.cs

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+// See https://aka.ms/new-console-template for more information
+using HexaGen;
+using HexaGen.Patching;
+
+List<string> headers = ["include/zconf.h", "include/zlib.h"];
+
+BatchGenerator batch = new();
+batch
+    .Setup<CsCodeGenerator>("generator.json")
+    .AddPrePatch(new NamingPatch(["Gz", "Zlib"], NamingPatchOptions.None))
+    .Generate(headers, "../../../../Hexa.NET.ZLib/Generated");

Generator/generator.json

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+{
+  "Namespace": "Hexa.NET.ZLib",
+  "ApiName": "ZLib",
+  "LibName": "ZLib",
+  "Usings": [ "System.Numerics" ],
+  "ImportType": "FunctionTable",
+  "EnableExperimentalOptions": true,
+  "GenerateConstructorsForStructs": true,
+  "GenerateSizeOfStructs": false,
+  "GenerateDelegates": true,
+  "GenerateMetadata": false,
+  "GenerateExtensions": true,
+  "DelegatesAsVoidPointer": true,
+  "BoolType": 0,
+  "IgnoredConstants": [ "PNG_HEADER_VERSION_STRING" ],
+  "IgnoredFunctions": [ "gzvprintf" ],
+  "IgnoredTypedefs": [
+    "gz_headerp",
+    "gzFilep",
+
+    "voidp",
+    "voidpc",
+    "voidpf",
+
+    "z_streamp"
+  ],
+  "TypeMappings": {
+    "va_list": "nuint",
+    "time_t": "long",
+    "FILE": "FILE",
+    "png_FILE_p": "FILE*",
+
+    "gz_header_s": "GZHeader",
+    "gz_headerp": "GZHeader*",
+    "gzFile_s": "GZFile",
+    "gzFilep": "GZFile*",
+
+    "voidp": "void*",
+    "voidpc": "void*",
+    "voidpf": "void*",
+
+    "z_stream_s": "ZStream",
+    "z_streamp": "ZStream*",
+    "z_size_t": "nint",
+    "uLongf": "uint",
+
+    "Bytef": "byte"
+  }
+}