internal static IntPtr GetInstHandle(object ob, Type type)
{
ClassBase cc = ClassManager.GetClass(type);
CLRObject co = GetInstance(ob, cc.tpHandle);
return(co.pyHandle);
}
/// <summary>
/// Descriptor __get__ implementation. Accessing a CLR method returns
/// a "bound" method similar to a Python bound method.
/// </summary>
public static IntPtr tp_descr_get(IntPtr ds, IntPtr ob, IntPtr tp)
{
var self = (MethodObject)GetManagedObject(ds);
MethodBinding binding;
// If the method is accessed through its type (rather than via
// an instance) we return an 'unbound' MethodBinding that will
// cached for future accesses through the type.
if (ob == IntPtr.Zero)
{
if (self.unbound == null)
{
self.unbound = new MethodBinding(self, IntPtr.Zero, tp);
}
binding = self.unbound;
Runtime.XIncref(binding.pyHandle);
;
return(binding.pyHandle);
}
if (Runtime.PyObject_IsInstance(ob, tp) < 1)
{
return(Exceptions.RaiseTypeError("invalid argument"));
}
// If the object this descriptor is being called with is a subclass of the type
// this descriptor was defined on then it will be because the base class method
// is being called via super(Derived, self).method(...).
// In which case create a MethodBinding bound to the base class.
var obj = GetManagedObject(ob) as CLRObject;
if (obj != null &&
obj.inst.GetType() != self.type &&
obj.inst is IPythonDerivedType &&
self.type.IsInstanceOfType(obj.inst))
{
ClassBase basecls = ClassManager.GetClass(self.type);
binding = new MethodBinding(self, ob, basecls.pyHandle);
return(binding.pyHandle);
}
binding = new MethodBinding(self, ob, tp);
return(binding.pyHandle);
}
/// <summary>
/// Implementation of [] semantics for reflected types. This exists
/// both to implement the Array[int] syntax for creating arrays and
/// to support generic name overload resolution using [].
/// </summary>
public override IntPtr type_subscript(IntPtr idx)
{
// If this type is the Array type, the [<type>] means we need to
// construct and return an array type of the given element type.
if (type == typeof(Array))
{
if (Runtime.PyTuple_Check(idx))
{
return(Exceptions.RaiseTypeError("type expected"));
}
var c = GetManagedObject(idx) as ClassBase;
Type t = c != null ? c.type : Converter.GetTypeByAlias(idx);
if (t == null)
{
return(Exceptions.RaiseTypeError("type expected"));
}
Type a = t.MakeArrayType();
ClassBase o = ClassManager.GetClass(a);
Runtime.XIncref(o.pyHandle);
return(o.pyHandle);
}
// If there are generics in our namespace with the same base name
// as the current type, then [<type>] means the caller wants to
// bind the generic type matching the given type parameters.
Type[] types = Runtime.PythonArgsToTypeArray(idx);
if (types == null)
{
return(Exceptions.RaiseTypeError("type(s) expected"));
}
Type gtype = AssemblyManager.LookupType($"{type.FullName}`{types.Length}");
if (gtype != null)
{
var g = ClassManager.GetClass(gtype) as GenericType;
return(g.type_subscript(idx));
//Runtime.XIncref(g.pyHandle);
//return g.pyHandle;
}
return(Exceptions.RaiseTypeError("unsubscriptable object"));
}
/// <summary>
/// Default implementation of [] semantics for reflected types.
/// </summary>
public virtual IntPtr type_subscript(IntPtr idx)
{
Type[] types = Runtime.PythonArgsToTypeArray(idx);
if (types == null)
{
return(Exceptions.RaiseTypeError("type(s) expected"));
}
Type target = GenericUtil.GenericForType(type, types.Length);
if (target != null)
{
Type t = target.MakeGenericType(types);
ManagedType c = ClassManager.GetClass(t);
Runtime.XIncref(c.pyHandle);
return(c.pyHandle);
}
return(Exceptions.RaiseTypeError("no type matches params"));
}
/// <summary>
/// Returns a ClassBase object representing a type that appears in
/// this module's namespace or a ModuleObject representing a child
/// namespace (or null if the name is not found). This method does
/// not increment the Python refcount of the returned object.
/// </summary>
public ManagedType GetAttribute(string name, bool guess)
{
ManagedType cached = null;
cache.TryGetValue(name, out cached);
if (cached != null)
{
return(cached);
}
ModuleObject m;
ClassBase c;
Type type;
//if (AssemblyManager.IsValidNamespace(name))
//{
// IntPtr py_mod_name = Runtime.PyString_FromString(name);
// IntPtr modules = Runtime.PyImport_GetModuleDict();
// IntPtr module = Runtime.PyDict_GetItem(modules, py_mod_name);
// if (module != IntPtr.Zero)
// return (ManagedType)this;
// return null;
//}
string qname = _namespace == string.Empty
? name
: _namespace + "." + name;
// If the fully-qualified name of the requested attribute is
// a namespace exported by a currently loaded assembly, return
// a new ModuleObject representing that namespace.
if (AssemblyManager.IsValidNamespace(qname))
{
m = new ModuleObject(qname);
StoreAttribute(name, m);
return(m);
}
// Look for a type in the current namespace. Note that this
// includes types, delegates, enums, interfaces and structs.
// Only public namespace members are exposed to Python.
type = AssemblyManager.LookupType(qname);
if (type != null)
{
if (!type.IsPublic)
{
return(null);
}
c = ClassManager.GetClass(type);
StoreAttribute(name, c);
return(c);
}
// This is a little repetitive, but it ensures that the right
// thing happens with implicit assembly loading at a reasonable
// cost. Ask the AssemblyManager to do implicit loading for each
// of the steps in the qualified name, then try it again.
bool ignore = name.StartsWith("__");
if (AssemblyManager.LoadImplicit(qname, !ignore))
{
if (AssemblyManager.IsValidNamespace(qname))
{
m = new ModuleObject(qname);
StoreAttribute(name, m);
return(m);
}
type = AssemblyManager.LookupType(qname);
if (type != null)
{
if (!type.IsPublic)
{
return(null);
}
c = ClassManager.GetClass(type);
StoreAttribute(name, c);
return(c);
}
}
// We didn't find the name, so we may need to see if there is a
// generic type with this base name. If so, we'll go ahead and
// return it. Note that we store the mapping of the unmangled
// name to generic type - it is technically possible that some
// future assembly load could contribute a non-generic type to
// the current namespace with the given basename, but unlikely
// enough to complicate the implementation for now.
if (guess)
{
string gname = GenericUtil.GenericNameForBaseName(_namespace, name);
if (gname != null)
{
ManagedType o = GetAttribute(gname, false);
if (o != null)
{
StoreAttribute(name, o);
return(o);
}
}
}
return(null);
}
internal static IntPtr CreateSubType(IntPtr py_name, IntPtr py_base_type, IntPtr py_dict)
{
// Utility to create a subtype of a managed type with the ability for the
// a python subtype able to override the managed implementation
string name = Runtime.GetManagedString(py_name);
// the derived class can have class attributes __assembly__ and __module__ which
// control the name of the assembly and module the new type is created in.
object assembly = null;
object namespaceStr = null;
var disposeList = new List <PyObject>();
try {
var assemblyKey = new PyObject(Converter.ToPython("__assembly__", typeof(string)));
disposeList.Add(assemblyKey);
if (0 != Runtime.PyMapping_HasKey(py_dict, assemblyKey.Handle))
{
var pyAssembly = new PyObject(Runtime.PyDict_GetItem(py_dict, assemblyKey.Handle));
Runtime.XIncref(pyAssembly.Handle);
disposeList.Add(pyAssembly);
if (!Converter.ToManagedValue(pyAssembly.Handle, typeof(string), out assembly, false))
{
throw new InvalidCastException("Couldn't convert __assembly__ value to string");
}
}
var namespaceKey = new PyObject(Converter.ToPythonImplicit("__namespace__"));
disposeList.Add(namespaceKey);
if (0 != Runtime.PyMapping_HasKey(py_dict, namespaceKey.Handle))
{
var pyNamespace = new PyObject(Runtime.PyDict_GetItem(py_dict, namespaceKey.Handle));
Runtime.XIncref(pyNamespace.Handle);
disposeList.Add(pyNamespace);
if (!Converter.ToManagedValue(pyNamespace.Handle, typeof(string), out namespaceStr, false))
{
throw new InvalidCastException("Couldn't convert __namespace__ value to string");
}
}
}
finally {
foreach (PyObject o in disposeList)
{
o.Dispose();
}
}
// create the new managed type subclassing the base managed type
var baseClass = ManagedType.GetManagedObject(py_base_type) as ClassBase;
if (null == baseClass)
{
return(Exceptions.RaiseTypeError("invalid base class, expected CLR class type"));
}
try {
Type subType = ClassDerivedObject.CreateDerivedType(name,
baseClass.type,
py_dict,
(string)namespaceStr,
(string)assembly);
// create the new ManagedType and python type
ClassBase subClass = ClassManager.GetClass(subType);
IntPtr py_type = GetTypeHandle(subClass, subType);
// by default the class dict will have all the C# methods in it, but as this is a
// derived class we want the python overrides in there instead if they exist.
IntPtr cls_dict = Marshal.ReadIntPtr(py_type, TypeOffset.tp_dict);
Runtime.PyDict_Update(cls_dict, py_dict);
return(py_type);
}
catch (Exception e) {
return(Exceptions.RaiseTypeError(e.Message));
}
}
internal static IntPtr CreateType(ManagedType impl, Type clrType)
{
// Cleanup the type name to get rid of funny nested type names.
string name = "CLR." + clrType.FullName;
int i = name.LastIndexOf('+');
if (i > -1)
{
name = name.Substring(i + 1);
}
i = name.LastIndexOf('.');
if (i > -1)
{
name = name.Substring(i + 1);
}
IntPtr base_ = IntPtr.Zero;
int ob_size = ObjectOffset.Size(Runtime.PyTypeType);
int tp_dictoffset = ObjectOffset.DictOffset(Runtime.PyTypeType);
// XXX Hack, use a different base class for System.Exception
// Python 2.5+ allows new style class exceptions but they *must*
// subclass BaseException (or better Exception).
if (typeof(Exception).IsAssignableFrom(clrType))
{
ob_size = ObjectOffset.Size(Exceptions.Exception);
tp_dictoffset = ObjectOffset.DictOffset(Exceptions.Exception);
}
if (clrType == typeof(Exception))
{
base_ = Exceptions.Exception;
}
else if (clrType.BaseType != null)
{
ClassBase bc = ClassManager.GetClass(clrType.BaseType);
base_ = bc.pyHandle;
}
IntPtr type = AllocateTypeObject(name);
Marshal.WriteIntPtr(type, TypeOffset.ob_type, Runtime.PyCLRMetaType);
Runtime.XIncref(Runtime.PyCLRMetaType);
Marshal.WriteIntPtr(type, TypeOffset.tp_basicsize, (IntPtr)ob_size);
Marshal.WriteIntPtr(type, TypeOffset.tp_itemsize, IntPtr.Zero);
Marshal.WriteIntPtr(type, TypeOffset.tp_dictoffset, (IntPtr)tp_dictoffset);
InitializeSlots(type, impl.GetType());
if (base_ != IntPtr.Zero)
{
Marshal.WriteIntPtr(type, TypeOffset.tp_base, base_);
Runtime.XIncref(base_);
}
int flags = TypeFlags.Default;
flags |= TypeFlags.Managed;
flags |= TypeFlags.HeapType;
flags |= TypeFlags.BaseType;
flags |= TypeFlags.HaveGC;
Util.WriteCLong(type, TypeOffset.tp_flags, flags);
// Leverage followup initialization from the Python runtime. Note
// that the type of the new type must PyType_Type at the time we
// call this, else PyType_Ready will skip some slot initialization.
Runtime.PyType_Ready(type);
IntPtr dict = Marshal.ReadIntPtr(type, TypeOffset.tp_dict);
string mn = clrType.Namespace ?? "";
IntPtr mod = Runtime.PyString_FromString(mn);
Runtime.PyDict_SetItemString(dict, "__module__", mod);
// Hide the gchandle of the implementation in a magic type slot.
GCHandle gc = GCHandle.Alloc(impl);
Marshal.WriteIntPtr(type, TypeOffset.magic(), (IntPtr)gc);
// Set the handle attributes on the implementing instance.
impl.tpHandle = Runtime.PyCLRMetaType;
impl.gcHandle = gc;
impl.pyHandle = type;
//DebugUtil.DumpType(type);
return(type);
}
internal static CLRObject GetInstance(object ob)
{
ClassBase cc = ClassManager.GetClass(ob.GetType());
return(GetInstance(ob, cc.tpHandle));
}
