static bool applyCustomMarshalling(ParameterInfo source, ParameterBuilder destination)
{
// [Marshaller]
var cm = source.customMarshaller();
if (null != cm)
{
cm.applyDelegateParams(source, destination);
return(true);
}
// [NativeString]
NativeStringAttribute nsa = source.GetCustomAttribute <NativeStringAttribute>();
if (null != nsa)
{
var cab = new CustomAttributeBuilder(ciMarshalAs, nativeStringType);
destination.SetCustomAttribute(cab);
// Copy In & Out attributes, if any
if (source.hasAttribute <InAttribute>())
{
destination.applyInAttribute();
}
if (source.hasAttribute <OutAttribute>())
{
destination.applyOutAttribute();
}
return(true);
}
return(false);
}
static void checkParameter(ParameterInfo source)
{
var cm = source.customMarshaller();
if (null != cm)
{
cm.getNativeType(source);
return;
}
NativeStringAttribute nsa = source.GetCustomAttribute <NativeStringAttribute>();
if (null != nsa)
{
if (source.ParameterType != typeof(string) && source.ParameterType != typeof(StringBuilder))
{
throw new ArgumentException($"[NativeString] must be applied to parameters of type string");
}
return;
}
if (source.isComInterface())
{
return;
}
if (source.ParameterType.IsByRef)
{
Type unwrapped = source.ParameterType.unwrapRef();
if (unwrapped.isDelegate())
{
throw new ArgumentException($"You can only pass delegates as input parameters");
}
if (source.IsIn && !unwrapped.IsValueType)
{
throw new ArgumentException($"in/out ref parameters only supported for value types");
}
}
if (source.ParameterType.isDelegate())
{
if (!source.ParameterType.hasCustomAttribute <UnmanagedFunctionPointerAttribute>())
{
throw new ArgumentException($"Parameter \"{ source.Name }\" of the method { source.Member.DeclaringType.FullName }.{ source.Member.Name } is a delegate without [UnmanagedFunctionPointer] attribute.");
}
}
}
