internal static unsafe object IsInst (InternalSystem.Object obj, TypeInfo type)
{
if (obj != null && IsBaseClassOf (obj.VTable.Type, type))
return obj;
else
return null;
}
internal static unsafe object CastClass (InternalSystem.Object obj, TypeInfo type)
{
if (obj != null && IsBaseClassOf (obj.VTable.Type, type))
return obj;
Throw (new InternalSystem.InvalidCastException (), 3);
// It doesn't come so far
return null;
}
public static bool IsValueType (TypeInfo type)
{
return IsBaseClassOf (type, "System", "ValueType");
}
public static TypeDefRow GetType (TypeInfo type)
{
TokenType tokType;
uint rid;
MetadataToken.Decode (type.MetadataToken, out tokType, out rid);
return GetType (type.Assembly, tokType, rid);
}
public static unsafe bool IsBaseClassOf (TypeInfo type, TypeInfo baseType)
{
byte *systemObject = Stubs.CString ("System.Object");
CString8 *str = null;
// Special case for System.Object
if (ByteString.Compare (systemObject, baseType.Name) == 0)
return true;
// If the type infos are the same, then the result is true
Debug.COM1.Write ("type: 0x");
Debug.COM1.Write ((int)type.MetadataToken, true);
Debug.COM1.Write (" '");
Debug.COM1.Write (type.Name);
Debug.COM1.WriteLine ("'");
Debug.COM1.Write ("basetype: 0x");
Debug.COM1.Write ((int)baseType.MetadataToken, true);
Debug.COM1.Write (" '");
Debug.COM1.Write (baseType.Name);
Debug.COM1.WriteLine ("'");
if (type == baseType)
return true;
return IsBaseClassOf (type.Assembly, type.MetadataToken, baseType.Assembly, baseType.MetadataToken);
}
public static unsafe bool IsBaseClassOf (TypeInfo type, CString8 *baseNS, CString8 *baseType)
{
AssemblyMetadata baseAsm;
uint token;
TypeRefRow row;
TypeDefRow def;
row = GetTypeRef (baseNS, baseType, out baseAsm, out token);
if (row != null) {
return IsBaseClassOf (type.Assembly, type.MetadataToken, baseAsm, token);
} else {
def = GetType (baseNS, baseType, out baseAsm, out token);
Diagnostics.Assert (def != null,
"Runtime.IsBaseClasOf(): couldn't find TypeRef/Def for named type");
return IsBaseClassOf (type.Assembly, type.MetadataToken, baseAsm, token);
}
}
public static unsafe bool IsBaseClassOf (TypeInfo type, string baseNS, string baseType)
{
CString8 *cBaseNS = CString8.Copy (baseNS);
CString8 *cBaseType = CString8.Copy (baseType);
return IsBaseClassOf (type, cBaseNS, cBaseType);
}