force utf8 encoding to InitWithArgs args

Author: wave-hm

Libraries/Generating/Sources/Internal/GsApi.cs

@@ -76,13 +76,25 @@ public static void Invoke(string[] args, string tmp) => SetTemp(tmp, () =>
         _ = NativeMethods.NewInstance(out var core, IntPtr.Zero);
         if (core == IntPtr.Zero) throw new GsApiException(GsApiStatus.UnknownError, "gsapi_new_instance");
 
+        IntPtr[] utf8argv = new IntPtr[args.Length];
+        for (int i = 0; i < utf8argv.Length; i++)
+        {
+            utf8argv[i] = NativeUtf8FromString(args[i]);
+        }
+
         try
         {
-            var code = NativeMethods.InitWithArgs(core, args.Length, args);
+            NativeMethods.SetArgEncoding(core, 1 /*GS_ARG_ENCODING_UTF8*/ );
+            var code = NativeMethods.InitWithArgs(core, utf8argv.Length, utf8argv);
             if (code < 0 && code != (int)GsApiStatus.Quit && code != (int)GsApiStatus.Info) throw new GsApiException(code);
         }
         finally
         {
+            for (int i = 0; i < utf8argv.Length; i++)
+            {
+                Marshal.FreeHGlobal(utf8argv[i]);
+            }
+
             _ = NativeMethods.Exit(core);
             NativeMethods.DeleteInstance(core);
         }
@@ -91,7 +103,24 @@ public static void Invoke(string[] args, string tmp) => SetTemp(tmp, () =>
     #endregion
 
     #region Implementations
-
+    /* --------------------------------------------------------------------- */
+    ///
+    /// NativeUtf8FromString
+    ///
+    /// <summary>
+    /// Convert string to nativeUTF8 ptr. *remember to clean up with a call to Marshal.FreeHGlobal.*
+    /// </summary>
+    ///
+    /* --------------------------------------------------------------------- */
+    public static IntPtr NativeUtf8FromString(string managedString)
+    {
+        int len = System.Text.Encoding.UTF8.GetByteCount(managedString);
+        byte[] buffer = new byte[len + 1]; // null-terminator allocated
+        System.Text.Encoding.UTF8.GetBytes(managedString, 0, managedString.Length, buffer, 0);
+        IntPtr nativeUtf8 = Marshal.AllocHGlobal(buffer.Length);
+        Marshal.Copy(buffer, 0, nativeUtf8, buffer.Length);
+        return nativeUtf8;
+    }
     /* --------------------------------------------------------------------- */
     ///
     /// SetTemp

Libraries/Generating/Sources/Internal/GsApiNative.cs

@@ -58,6 +58,18 @@ internal static class NativeMethods
     [DllImport(LibName, EntryPoint = "gsapi_new_instance")]
     public static extern int NewInstance(out IntPtr instance, IntPtr handle);
 
+    /* --------------------------------------------------------------------- */
+    ///
+    /// SetArgEncoding
+    ///
+    /// <summary>
+    /// Sets encoding of arguments supplied via the gsapi interface
+    /// </summary>
+    ///
+    /* --------------------------------------------------------------------- */
+    [DllImport(LibName, EntryPoint = "gsapi_set_arg_encoding")]
+    public static extern int SetArgEncoding(IntPtr instance, int encoding);
+
     /* --------------------------------------------------------------------- */
     ///
     /// InitWithArgs
@@ -68,7 +80,7 @@ internal static class NativeMethods
     ///
     /* --------------------------------------------------------------------- */
     [DllImport(LibName, EntryPoint = "gsapi_init_with_args")]
-    public static extern int InitWithArgs(IntPtr instance, int argc, string[] argv);
+    public static extern int InitWithArgs(IntPtr instance, int argc, IntPtr[] argv);
 
     /* --------------------------------------------------------------------- */
     ///