ILSpy/ILSpy/Fusion.cs

// Copyright (c) 2011 AlphaSierraPapa for the SharpDevelop Team
// 
// 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.

using System;
using System.Runtime.InteropServices;
using System.Text;

namespace ICSharpCode.ILSpy
{
	// .NET Fusion COM interfaces
	[ComImport(), Guid("CD193BC0-B4BC-11D2-9833-00C04FC31D2E"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
	internal interface IAssemblyName
	{
		[PreserveSig()]
		int SetProperty(uint PropertyId, IntPtr pvProperty, uint cbProperty);
		
		[PreserveSig()]
		int GetProperty(uint PropertyId, IntPtr pvProperty, ref uint pcbProperty);
		
		[PreserveSig()]
		int Finalize();
		
		[PreserveSig()]
		int GetDisplayName([Out(), MarshalAs(UnmanagedType.LPWStr)] StringBuilder szDisplayName,
		                   ref uint pccDisplayName,
		                   uint dwDisplayFlags);
		
		[PreserveSig()]
		int BindToObject(object refIID,
		                 object pAsmBindSink,
		                 IApplicationContext pApplicationContext,
		                 [MarshalAs(UnmanagedType.LPWStr)] string szCodeBase,
		                 long llFlags,
		                 int pvReserved,
		                 uint cbReserved,
		                 out int ppv);
		
		[PreserveSig()]
		int GetName(ref uint lpcwBuffer,
		            [Out(), MarshalAs(UnmanagedType.LPWStr)] StringBuilder pwzName);
		
		[PreserveSig()]
		int GetVersion(out uint pdwVersionHi, out uint pdwVersionLow);
		
		[PreserveSig()]
		int IsEqual(IAssemblyName pName,
		            uint dwCmpFlags);
		
		[PreserveSig()]
		int Clone(out IAssemblyName pName);
	}
	
	[ComImport(), Guid("7C23FF90-33AF-11D3-95DA-00A024A85B51"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
	internal interface IApplicationContext
	{
		void SetContextNameObject(IAssemblyName pName);
		
		void GetContextNameObject(out IAssemblyName ppName);
		
		void Set([MarshalAs(UnmanagedType.LPWStr)] string szName,
		         int pvValue,
		         uint cbValue,
		         uint dwFlags);
		
		void Get([MarshalAs(UnmanagedType.LPWStr)] string szName,
		         out int pvValue,
		         ref uint pcbValue,
		         uint dwFlags);
		
		void GetDynamicDirectory(out int wzDynamicDir,
		                         ref uint pdwSize);
	}
	
	[ComImport(), Guid("21B8916C-F28E-11D2-A473-00C04F8EF448"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
	internal interface IAssemblyEnum
	{
		[PreserveSig()]
		int GetNextAssembly(out IApplicationContext ppAppCtx,
		                    out IAssemblyName ppName,
		                    uint dwFlags);
		
		[PreserveSig()]
		int Reset();
		
		[PreserveSig()]
		int Clone(out IAssemblyEnum ppEnum);
	}
	
	internal static class Fusion
	{
		// dwFlags: 1 = Enumerate native image (NGEN) assemblies
		//          2 = Enumerate GAC assemblies
		//          4 = Enumerate Downloaded assemblies
		//
		[DllImport("fusion.dll", CharSet=CharSet.Auto)]
		internal static extern int CreateAssemblyEnum(out IAssemblyEnum ppEnum,
		                                              IApplicationContext pAppCtx,
		                                              IAssemblyName pName,
		                                              uint dwFlags,
		                                              int pvReserved);
		
		[DllImport("fusion.dll")]
		internal static extern int GetCachePath(uint flags,
		                                        [MarshalAs(UnmanagedType.LPWStr)] StringBuilder wzDir,
		                                        ref uint pdwSize);
		
		public static string GetGacPath(bool isCLRv4 = false)
		{
			const uint ASM_CACHE_ROOT    = 0x08; // CLR V2.0
			const uint ASM_CACHE_ROOT_EX = 0x80; // CLR V4.0
			uint flags = isCLRv4 ? ASM_CACHE_ROOT_EX : ASM_CACHE_ROOT;
			
			const int size = 260; // MAX_PATH
			StringBuilder b = new StringBuilder(size);
			uint tmp = size;
			GetCachePath(flags, b, ref tmp);
			return b.ToString();
		}
	}
}