protected MethodInfo GrabPInvokeImpl(MethodInfo Original, TypeBuilder On)
{
if (On == null)
{
On = GrabType(Original.DeclaringType) as TypeBuilder;
}
DllImportAttribute Attr = FindCustomAttribute <DllImportAttribute>(Original);
if (Attr == null)
{
throw new InvalidOperationException("P/Invoke method without a DllImportAttribute");
}
Type ReturnType = GrabType(Original.ReturnType);
Type[] Parameters = ParameterTypes(Original);
if (MethodsDone.ContainsKey(Original))
{
return(MethodsDone[Original]);
}
MethodBuilder PInvoke = On.DefinePInvokeMethod(Original.Name, Attr.Value, Original.Attributes, Original.CallingConvention,
ReturnType, Parameters, Attr.CallingConvention, Attr.CharSet);
PInvoke.SetImplementationFlags(Original.GetMethodImplementationFlags());
MethodsDone.Add(Original, PInvoke);
return(PInvoke);
}
protected MethodInfo GrabMethod(MethodInfo Original, TypeBuilder On)
{
if(Original == null) return null;
if(MethodsDone.ContainsKey(Original))
return MethodsDone[Original];
if(!Sources.Contains(Original.Module))
return MethodReplaceGenerics(Original);
if(On == null)
On = GrabType(Original.DeclaringType) as TypeBuilder;
if((Original.Attributes & MethodAttributes.PinvokeImpl) == MethodAttributes.PinvokeImpl)
return GrabPInvokeImpl(Original, On);
Type ReturnType = GrabType(Original.ReturnType);
Type[] Parameters = ParameterTypes(Original);
if(MethodsDone.ContainsKey(Original))
return MethodsDone[Original];
MethodBuilder Builder = On.DefineMethod(Original.Name, Original.Attributes, ReturnType, Parameters);
MethodsDone.Add(Original, Builder);
// Explicit interface implementations require specifying which method is being overridden.
if(Original.IsFinal)
{
if(Original.Name.Contains("."))
{
MethodInfo Overriding = FindBaseMethod(Original, Original.DeclaringType);
if(Overriding != null)
On.DefineMethodOverride(Builder, Overriding);
}
else
{
// Crawl among the interfaces attempting to guess the method that is being overridden.
foreach(Type T in Original.DeclaringType.GetInterfaces())
{
foreach(MethodInfo M in T.GetMethods())
{
if(M.IsAbstract && M.Name == Original.Name)
{
On.DefineMethodOverride(Builder, M);
goto foundoverride; // For lack of "break 2" statement.
}
}
}
}
}
foundoverride:
Builder.SetImplementationFlags(Original.GetMethodImplementationFlags());
CopyMethodBody(Original, Builder);
return Builder;
}
