expose native codec version

Author: aloneguid

docs/release-notes.md

@@ -3,6 +3,7 @@
 - Add ` /guard:cf` by @johnthcall in #26.
 - Where possible, increase "buffer size" variable resolution to `int64_t` (#28).
 - Native and managed dependencies upgraded to the latest versions.
+- Added method to get native library version from C#.
 
 ## 1.6.3
 

managed/IronCompress.Test/IronTest.cs

@@ -73,6 +73,11 @@ public void CheckNoNativeGzip() {
 
     [Fact]
     public void CheckVersion() {
-        Assert.NotEmpty(Iron.GetNativeVersion());
+        Assert.NotNull(Iron.GetNativeVersion());
+    }
+
+    [Fact]
+    public void CheckCodecVersion() {
+        Assert.Equal("1.2.2", Iron.GetNativeCodecVersion(Codec.Snappy));
     }
 }

managed/IronCompress/Iron.cs

@@ -50,12 +50,28 @@ public static bool SupportsNative(Codec c) {
             return Native.iron_is_supported((int)c);
         }
 
+        /// <summary>
+        /// Returns native library version string, or null if native library is not available
+        /// </summary>
+        /// <returns></returns>
         public static string? GetNativeVersion() {
             IntPtr ptr = Native.iron_version();
             string? version = Marshal.PtrToStringAnsi(ptr);
             return version;
         }
 
+        /// <summary>
+        /// Retrieves the version string of the native library associated with the specified codec.
+        /// </summary>
+        /// <param name="codec">The codec for which to obtain the native library version.</param>
+        /// <returns>A string containing the version of the native library for the specified codec, or null if the version cannot
+        /// be determined.</returns>
+        public static string? GetNativeCodecVersion(Codec codec) {
+            IntPtr ptr = Native.get_native_library_version((int)codec);
+            string? version = Marshal.PtrToStringAnsi(ptr);
+            return version;
+        }
+
         /// <summary>
         /// Set to force specific platform. Used mostly in benchmarking tests, prefer not to set.
         /// </summary>

managed/IronCompress/Native.cs

@@ -58,6 +58,6 @@ internal static extern unsafe bool iron_compress(bool compress,
         internal static extern IntPtr iron_version();
 
         [DllImport(LibName)]
-        internal static extern string get_native_library_version(int codec);
+        internal static extern IntPtr get_native_library_version(int codec);
     }
 }

native/CMakeLists.txt

@@ -72,6 +72,11 @@ if(${CMAKE_CXX_COMPILER_ID} STREQUAL "MSVC")
     set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /MTd")
 endif()
 
+if(NOT DEFINED ENV{DOTNET_RID})
+    # Default to win-x64 if not defined, for local testing
+    set(ENV{DOTNET_RID} "win-x64")
+endif()
+
 # https://cmake.org/cmake/help/latest/manual/cmake-generator-expressions.7.html#generator-expression-reference
 add_custom_command(
     TARGET ${PROJECT_NAME}