// Copyright (c) Microsoft Corporation. All rights reserved.

// Licensed under the MIT license.

using System;

using System.Collections.Generic;

using System.Linq;

using System.Reflection;

using System.Runtime.CompilerServices;

namespace Microsoft.ClearScript.Util

{

internal static class AssemblyHelpers

{

public static T GetAttribute<T>(this Assembly assembly, bool inherit) where T : Attribute

{

return Attribute.GetCustomAttributes(assembly, typeof(T), inherit).SingleOrDefault() as T;

}

public static IEnumerable<T> GetAttributes<T>(this Assembly assembly, bool inherit) where T : Attribute

{

return Attribute.GetCustomAttributes(assembly, typeof(T), inherit).OfType<T>();

}

public static bool IsFriendOf(this Assembly thisAssembly, Assembly thatAssembly)

{

if (thatAssembly == thisAssembly)

{

return true;

}

var thisName = thisAssembly.GetName();

foreach (var attribute in thatAssembly.GetAttributes<InternalsVisibleToAttribute>(false))

{

var thatName = new AssemblyName(attribute.AssemblyName);

if (AssemblyName.ReferenceMatchesDefinition(thatName, thisName))

{

return true;

}

}

return false;

}

}

}