private static T LoadComponents <T>(T value,
Type type,
IImportProvider ip,
LoadMethodFunction methodFn,
LoadFieldFunction <T> fieldFn = null)
{
(MemberInfo[] members, ImportAttribute[] attributes) = type.GetAnnotated <ImportAttribute>();
int lim = attributes.Length;
if (lim == default)
{
return(value);
}
for (int i = 0; i < lim; i++)
{
var attr = attributes[i];
var mem = members[i];
// Resolve the symbol
string id = ResolveIdentifier(attr, mem);
Pointer <byte> addr = ip.GetAddress(id);
switch (mem.MemberType)
{
case MemberTypes.Property:
var propInfo = (PropertyInfo)mem;
var get = propInfo.GetMethod;
methodFn(attr, get, addr);
break;
case MemberTypes.Method:
// The import is a function or (ctor)
methodFn(attr, (MethodInfo)mem, addr);
break;
case MemberTypes.Field:
fieldFn?.Invoke(ref value, ip, id, (MetaField)mem, attr);
break;
default:
throw Guard.NotSupportedMemberFail(mem);
}
Global.Value.WriteVerbose(null, "Loaded member {Id} @ {Addr}", id, addr);
}
return(value);
}
private void LoadField <T>(ref T value,
IImportProvider ip,
string identifier,
MetaField field,
ImportAttribute attr)
{
var ifld = (ImportFieldAttribute)attr;
Pointer <byte> ptr = ip.GetAddress(identifier);
var options = ifld.FieldOptions;
Pointer <byte> fieldAddr = field.GetValueAddress(ref value);
object fieldValue;
Global.Value.WriteDebug(Id, "Loading field {Id} with {Option}",
field.Name, options);
switch (options)
{
case ImportFieldOptions.CopyIn:
fieldValue = CopyInField(ifld, field, ptr);
break;
case ImportFieldOptions.Proxy:
fieldValue = ProxyLoadField(ifld, field, ptr);
break;
case ImportFieldOptions.Fast:
FastLoadField(field, ptr, fieldAddr);
return;
default:
throw new ArgumentOutOfRangeException();
}
if (field.FieldType.IsAnyPointer)
{
ptr.WritePointer((Pointer <byte>)fieldValue);
}
else
{
ptr.WriteAny(field.FieldType.RuntimeType, fieldValue);
}
}