Add a static to ignore missing library

+ This will be used for ignoring dll check while static library on AOT build is preferred

Author: neon-nyan

ZstdNet/ExternMethods.cs

@@ -55,7 +55,17 @@ public static void SetWinDllDirectory()
         [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
         private static extern bool SetDllDirectory(string path);
 #else
-        public static bool IsLibraryExist(string libraryName) => File.Exists(string.Format(_libFullPath, libraryName));
+        public static bool IsIgnoreMissingLibrary = false;
+
+        public static bool IsLibraryExist(string libraryName) => IsIgnoreMissingLibrary || File.Exists(string.Format(_libFullPath, libraryName));
+
+#if NET6_0_OR_GREATER
+        public static void ThrowIfDllNotExist()
+        {
+            if (!IsLibraryExist(DllName))
+                throw new DllNotFoundException("libzstd.dll is not found!");
+        }
+#endif
 
         internal static IntPtr DllImportResolver(string libraryName, Assembly assembly, DllImportSearchPath? searchPath)
         {

ZstdNet/ThrowHelper.cs

@@ -7,11 +7,7 @@ namespace ZstdNet
     internal static class ReturnValueExtensions
     {
 #if NET6_0_OR_GREATER
-        public static void ThrowIfDllNotExist()
-        {
-            if (!DllUtils.IsLibraryExist(DllUtils.DllName))
-                throw new DllNotFoundException("libzstd.dll is not found!");
-        }
+        public static void ThrowIfDllNotExist() => DllUtils.ThrowIfDllNotExist();
 #endif
 
         public static size_t EnsureZdictSuccess(this size_t returnValue)

ZstdNet/ZstdNet.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
 	<PropertyGroup>
-		<Version>1.6.3</Version>
+		<Version>1.6.4</Version>
 		<TargetFrameworks>netstandard2.0;net6.0;net7.0;net8.0;net9.0</TargetFrameworks>
 		<Title>ZstdNet</Title>
 		<PackageId>Hi3Helper.ZstdNet</PackageId>