Imported Upstream version 4.8.0.309

Former-commit-id: 5f9c6ae75f295e057a7d2971f3a6df4656fa8850

mcs/class/System/Mono.Btls/MonoBtlsError.cs

@@ -0,0 +1,83 @@
+//
+// MonoBtlsError.cs
+//
+// Author:
+//       Martin Baulig <martin.baulig@xamarin.com>
+//
+// Copyright (c) 2015 Xamarin Inc. (http://www.xamarin.com)
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+#if SECURITY_DEP && MONO_FEATURE_BTLS
+using System;
+using System.IO;
+using System.Text;
+using System.Runtime.InteropServices;
+using System.Runtime.CompilerServices;
+
+#if MONOTOUCH
+using MonoTouch;
+#endif
+
+namespace Mono.Btls
+{
+	static class MonoBtlsError
+	{
+		[DllImport (MonoBtlsObject.BTLS_DYLIB)]
+		extern static int mono_btls_error_peek_error ();
+
+		[DllImport (MonoBtlsObject.BTLS_DYLIB)]
+		extern static int mono_btls_error_get_error ();
+
+		[DllImport (MonoBtlsObject.BTLS_DYLIB)]
+		extern static void mono_btls_error_clear_error ();
+
+		[DllImport (MonoBtlsObject.BTLS_DYLIB)]
+		extern static void mono_btls_error_get_error_string_n (int error, IntPtr buf, int len);
+
+		public static int PeekError ()
+		{
+			return mono_btls_error_peek_error ();
+		}
+
+		public static int GetError ()
+		{
+			return mono_btls_error_get_error ();
+		}
+
+		public static void ClearError ()
+		{
+			mono_btls_error_clear_error ();
+		}
+
+		public static string GetErrorString (int error)
+		{
+			var size = 1024;
+			var buffer = Marshal.AllocHGlobal (size);
+			if (buffer == IntPtr.Zero)
+				throw new OutOfMemoryException ();
+			try {
+				mono_btls_error_get_error_string_n (error, buffer, size);
+				return Marshal.PtrToStringAnsi (buffer);
+			} finally {
+				Marshal.FreeHGlobal (buffer);
+			}
+		}
+	}
+}
+#endif