/*
* This private function provides implementation for the two public versions.
* searchPath is a simicolon-delimited list of paths on which to search for pathModule.
* If searchPath is null, pathModule must be a full path to the assembly.
*/
private static ISymbolReader GetReaderForFile(SymbolBinder binder, string pathModule, string searchPath)
{
// First create the Metadata dispenser.
object objDispenser;
NativeMethods.CoCreateInstance(ref dispenserClassID, null, 1, ref dispenserIID, out objDispenser);
// Now open an Importer on the given filename. We'll end up passing this importer straight
// through to the Binder.
object objImporter;
IMetaDataDispenserPrivate dispenser = (IMetaDataDispenserPrivate)objDispenser;
dispenser.OpenScope(pathModule, OPEN_READ, ref importerIID, out objImporter);
IntPtr importerPtr = IntPtr.Zero;
ISymbolReader reader;
try
{
// This will manually AddRef the underlying object, so we need to be very careful to Release it.
importerPtr = Marshal.GetComInterfaceForObject(objImporter, typeof(IMetadataImportPrivateComVisible));
reader = binder.GetReader(importerPtr, pathModule, searchPath);
}
finally
{
if (importerPtr != IntPtr.Zero)
{
Marshal.Release(importerPtr);
}
}
return(reader);
}
// Initialization routine that allows a customized writer object to be supplied
private static ISymbolWriter2 InitializeWriterForFile(SymbolWriter writer, string pathModule, ref object emitter)
{
// If no emitter is provided, make one and return it.
if (emitter == null)
{
// First get a dispenser
object objDispenser;
NativeMethods.CoCreateInstance(ref dispenserClassID, null, 1, ref dispenserIID, out objDispenser);
Debug.Assert(objDispenser != null, "Dispenser is null.");
// Now get an emitter
IMetaDataDispenserPrivate dispenser = (IMetaDataDispenserPrivate)objDispenser;
dispenser.OpenScope(pathModule, OPEN_WRITE, ref emitterIID, out emitter);
}
Debug.Assert(emitter != null, "Emitter is null.");
// An emitter was provided, just use that one.
writer.Initialize(emitter, pathModule, false);
return(writer);
}