Add back support for config mapped names

src/cs/production/c2cs.Tool/GenerateCSharpCode/InputSanitized.cs

@@ -1,6 +1,7 @@
 // Copyright (c) Bottlenose Labs Inc. (https://github.com/bottlenoselabs). All rights reserved.
 // Licensed under the MIT license. See LICENSE file in the Git repository root directory for full license information.
 
+using System.Collections.Immutable;
 using NuGet.Frameworks;
 
 namespace C2CS.GenerateCSharpCode;
@@ -23,6 +24,8 @@ public class InputSanitized
 
     public string CodeRegionFooter { get; init; } = string.Empty;
 
+    public ImmutableDictionary<string, string> MappedNames { get; init; } = ImmutableDictionary<string, string>.Empty;
+
     public bool IsEnabledGenerateCSharpRuntimeCode { get; init; }
 
     public bool IsEnabledFunctionPointers { get; init; }

src/cs/production/c2cs.Tool/GenerateCSharpCode/InputSanitizer.cs

@@ -2,6 +2,8 @@
 // Licensed under the MIT license. See LICENSE file in the Git repository root directory for full license information.
 
 using System;
+using System.Collections.Generic;
+using System.Collections.Immutable;
 using System.IO;
 using System.IO.Abstractions;
 using bottlenoselabs.Common.Tools;
@@ -15,7 +17,6 @@ public override InputSanitized Sanitize(InputUnsanitized unsanitizedInput)
     {
         var inputFilePath = InputFilePath(unsanitizedInput.InputCrossPlatformFfiFilePath);
         var outputFileDirectory = OutputFileDirectory(unsanitizedInput.OutputCSharpCodeFileDirectory);
-
         var className = ClassName(unsanitizedInput.ClassName);
         var libraryName = LibraryName(unsanitizedInput.LibraryName, className);
         var targetFramework = TargetFramework(unsanitizedInput.TargetFrameworkMoniker);
@@ -30,6 +31,7 @@ public override InputSanitized Sanitize(InputUnsanitized unsanitizedInput)
             NamespaceName = NamespaceName(unsanitizedInput.NamespaceName),
             CodeRegionHeader = HeaderCodeRegion(unsanitizedInput.HeaderCodeRegionFilePath),
             CodeRegionFooter = FooterCodeRegion(unsanitizedInput.FooterCodeRegionFilePath),
+            MappedNames = MappedNames(unsanitizedInput.MappedNames),
             IsEnabledGenerateCSharpRuntimeCode = unsanitizedInput.IsEnabledGeneratingRuntimeCode ?? true,
             IsEnabledFunctionPointers = IsEnabledFunctionPointers(unsanitizedInput, targetFramework),
             IsEnabledRuntimeMarshalling = IsEnabledRuntimeMarshalling(unsanitizedInput, targetFramework),
@@ -164,6 +166,28 @@ private NuGetFramework TargetFramework(string? targetFrameworkMoniker)
         return nuGetFramework;
     }
 
+    private ImmutableDictionary<string, string> MappedNames(ImmutableArray<InputUnsanitizedMappedName>? mappedNames)
+    {
+        if (mappedNames == null)
+        {
+            return ImmutableDictionary<string, string>.Empty;
+        }
+
+        var dictionary = new Dictionary<string, string>();
+
+        foreach (var mappedName in mappedNames)
+        {
+            if (string.IsNullOrEmpty(mappedName.Source) || string.IsNullOrEmpty(mappedName.Target))
+            {
+                continue;
+            }
+
+            dictionary.Add(mappedName.Source, mappedName.Target);
+        }
+
+        return dictionary.ToImmutableDictionary();
+    }
+
     private static bool IsEnabledFunctionPointers(InputUnsanitized unsanitizedInput, NuGetFramework nuGetFramework)
     {
         // Function pointers are supported only in C# 9+ and .NET 5+

src/cs/production/c2cs.Tool/GenerateCSharpCode/NameMapper.cs

@@ -45,6 +45,12 @@ public NameMapper(CodeGeneratorContext context)
         _cSharpNamesByCNames.Add("FILE*", "IntPtr");
         _cSharpNamesByCNames.Add("DIR*", "IntPtr");
         _cSharpNamesByCNames.Add("va_list", "IntPtr");
+
+        // config specified
+        foreach (var (source, target) in context.Input.MappedNames)
+        {
+            _cSharpNamesByCNames.Add(source, target);
+        }
     }
 
     public string GetIdentifierCSharp(string nameC)