From dbde9e7104b907bbbaea17e21247d8cafc8b3a4c Mon Sep 17 00:00:00 2001
From: Rob Mensching <rob@firegiant.com>
Date: Sat, 14 Oct 2017 16:12:07 -0700
Subject: Massive refactoring to introduce the concept of IBackend

---
 .../CLR/Interop/CLRInterop.cs                      | 147 +++++++++++++++++++++
 1 file changed, 147 insertions(+)
 create mode 100644 src/WixToolset.Core.WindowsInstaller/CLR/Interop/CLRInterop.cs

(limited to 'src/WixToolset.Core.WindowsInstaller/CLR/Interop/CLRInterop.cs')

diff --git a/src/WixToolset.Core.WindowsInstaller/CLR/Interop/CLRInterop.cs b/src/WixToolset.Core.WindowsInstaller/CLR/Interop/CLRInterop.cs
new file mode 100644
index 00000000..4157f23a
--- /dev/null
+++ b/src/WixToolset.Core.WindowsInstaller/CLR/Interop/CLRInterop.cs
@@ -0,0 +1,147 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Clr.Interop
+{
+    using System;
+    using System.Runtime.InteropServices;
+
+    /// <summary>
+    /// Interop class for mscorwks.dll assembly name APIs.
+    /// </summary>
+    internal sealed class ClrInterop
+    {
+        private static readonly Guid referenceIdentityGuid = new Guid("6eaf5ace-7917-4f3c-b129-e046a9704766");
+
+        /// <summary>
+        /// Protect the constructor.
+        /// </summary>
+        private ClrInterop()
+        {
+        }
+
+        /// <summary>
+        /// Represents a reference to the unique signature of a code object.
+        /// </summary>
+        [ComImport]
+        [Guid("6eaf5ace-7917-4f3c-b129-e046a9704766")]
+        [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
+        internal interface IReferenceIdentity
+        {
+            /// <summary>
+            /// Get an assembly attribute.
+            /// </summary>
+            /// <param name="attributeNamespace">Attribute namespace.</param>
+            /// <param name="attributeName">Attribute name.</param>
+            /// <returns>The assembly attribute.</returns>
+            [return: MarshalAs(UnmanagedType.LPWStr)]
+            string GetAttribute(
+                [In, MarshalAs(UnmanagedType.LPWStr)] string attributeNamespace,
+                [In, MarshalAs(UnmanagedType.LPWStr)] string attributeName);
+
+            /// <summary>
+            /// Set an assembly attribute.
+            /// </summary>
+            /// <param name="attributeNamespace">Attribute namespace.</param>
+            /// <param name="attributeName">Attribute name.</param>
+            /// <param name="attributeValue">Attribute value.</param>
+            void SetAttribute(
+                [In, MarshalAs(UnmanagedType.LPWStr)] string attributeNamespace,
+                [In, MarshalAs(UnmanagedType.LPWStr)] string attributeName,
+                [In, MarshalAs(UnmanagedType.LPWStr)] string attributeValue);
+
+            /// <summary>
+            /// Get an iterator for the assembly's attributes.
+            /// </summary>
+            /// <returns>Assembly attribute enumerator.</returns>
+            IEnumIDENTITY_ATTRIBUTE EnumAttributes();
+
+            /// <summary>
+            /// Clone an IReferenceIdentity.
+            /// </summary>
+            /// <param name="countOfDeltas">Count of deltas.</param>
+            /// <param name="deltas">The deltas.</param>
+            /// <returns>Cloned IReferenceIdentity.</returns>
+            IReferenceIdentity Clone(
+                [In] IntPtr /*SIZE_T*/ countOfDeltas,
+                [In, MarshalAs(UnmanagedType.LPArray)] IDENTITY_ATTRIBUTE[] deltas);
+        }
+
+        /// <summary>
+        /// IEnumIDENTITY_ATTRIBUTE interface.
+        /// </summary>
+        [ComImport]
+        [Guid("9cdaae75-246e-4b00-a26d-b9aec137a3eb")]
+        [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
+        internal interface IEnumIDENTITY_ATTRIBUTE
+        {
+            /// <summary>
+            /// Gets the next attributes.
+            /// </summary>
+            /// <param name="celt">Count of elements.</param>
+            /// <param name="attributes">Array of attributes being returned.</param>
+            /// <returns>The next attribute.</returns>
+            uint Next(
+                [In] uint celt,
+                [Out, MarshalAs(UnmanagedType.LPArray)] IDENTITY_ATTRIBUTE[] attributes);
+
+            /// <summary>
+            /// Copy the current attribute into a buffer.
+            /// </summary>
+            /// <param name="available">Number of available bytes.</param>
+            /// <param name="data">Buffer into which attribute should be written.</param>
+            /// <returns>Pointer to buffer containing the attribute.</returns>
+            IntPtr CurrentIntoBuffer(
+                [In] IntPtr /*SIZE_T*/ available,
+                [Out, MarshalAs(UnmanagedType.LPArray)] byte[] data);
+
+            /// <summary>
+            /// Skip past a number of elements.
+            /// </summary>
+            /// <param name="celt">Count of elements to skip.</param>
+            void Skip([In] uint celt);
+
+            /// <summary>
+            /// Reset the enumeration to the beginning.
+            /// </summary>
+            void Reset();
+
+            /// <summary>
+            /// Clone this attribute enumeration.
+            /// </summary>
+            /// <returns>Clone of a IEnumIDENTITY_ATTRIBUTE.</returns>
+            IEnumIDENTITY_ATTRIBUTE Clone();
+        }
+
+        /// <summary>
+        /// Gets the guid.
+        /// </summary>
+        public static Guid ReferenceIdentityGuid
+        {
+            get { return referenceIdentityGuid; }
+        }
+
+        /// <summary>
+        /// Gets an interface pointer to an object with the specified IID, in the assembly at the specified file path.
+        /// </summary>
+        /// <param name="wszAssemblyPath">A valid path to the requested assembly.</param>
+        /// <param name="riid">The IID of the interface to return.</param>
+        /// <param name="i">The returned interface pointer.</param>
+        /// <returns>The error code.</returns>
+        [DllImport("mscorwks.dll", CharSet = CharSet.Unicode, EntryPoint = "GetAssemblyIdentityFromFile")]
+        internal static extern uint GetAssemblyIdentityFromFile(System.String wszAssemblyPath, ref Guid riid, out IReferenceIdentity i);
+
+        /// <summary>
+        /// Assembly attributes. Contains data about an IReferenceIdentity.
+        /// </summary>
+        [StructLayout(LayoutKind.Sequential)]
+        internal struct IDENTITY_ATTRIBUTE
+        {
+            [MarshalAs(UnmanagedType.LPWStr)]
+            public string AttributeNamespace;
+            [MarshalAs(UnmanagedType.LPWStr)]
+            public string AttributeName;
+            [MarshalAs(UnmanagedType.LPWStr)]
+            public string AttributeValue;
+        }
+    }
+}
-- 
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