68 lines
2.4 KiB
C#
68 lines
2.4 KiB
C#
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//
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// Copyright (c) 2022 Antmicro
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//
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// This file is licensed under the MIT License.
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// Full license text is available in 'licenses/MIT.txt'.
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//
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using System;
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using System.Collections;
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using System.IO;
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using System.Linq;
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using System.Reflection;
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using System.Runtime.InteropServices;
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using System.Xml.Linq;
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namespace TermSharp.Example
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{
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public static class DllMap
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{
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// Register a call-back for native library resolution.
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public static void Register(Assembly assembly)
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{
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NativeLibrary.SetDllImportResolver(assembly, MapAndLoad);
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}
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// The callback which loads the mapped libray in place of the original.
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private static IntPtr MapAndLoad(string libraryName, Assembly assembly, DllImportSearchPath? dllImportSearchPath)
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{
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var wasMapped = MapLibraryName(assembly.Location, libraryName, out var mappedName);
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if(!wasMapped)
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{
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mappedName = libraryName;
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}
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return NativeLibrary.Load(mappedName, assembly, dllImportSearchPath);
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}
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// Parse the dll.config file and map the old name to the new name of a library.
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private static bool MapLibraryName(string assemblyLocation, string originalLibName, out string mappedLibName)
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{
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string xmlPath = Path.Combine(Path.GetDirectoryName(assemblyLocation), Path.GetFileNameWithoutExtension(assemblyLocation) + ".dll.config");
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mappedLibName = null;
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if (!File.Exists(xmlPath))
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{
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return false;
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}
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var currOsAttr = RuntimeInformation.IsOSPlatform(OSPlatform.OSX) ? "osx" :
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RuntimeInformation.IsOSPlatform(OSPlatform.Windows) ? "windows" :
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RuntimeInformation.IsOSPlatform(OSPlatform.Linux) ? "linux" : null;
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XElement root = XElement.Load(xmlPath);
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var map = (
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from el in root.Elements("dllmap")
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where (string)el.Attribute("dll") == originalLibName
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let osAttr = (string)el.Attribute("os")
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where (osAttr == null || osAttr == currOsAttr || (osAttr.StartsWith("!") && !osAttr.Contains(currOsAttr)))
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select el
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).SingleOrDefault();
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if (map != null)
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{
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mappedLibName = map.Attribute("target").Value;
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}
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return (mappedLibName != null);
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}
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}
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}
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