| |
| /* Type object implementation */ |
| |
| #include "Python.h" |
| #include "structmember.h" |
| |
| static struct memberlist type_members[] = { |
| {"__basicsize__", T_INT, offsetof(PyTypeObject,tp_basicsize),READONLY}, |
| {"__itemsize__", T_INT, offsetof(PyTypeObject, tp_itemsize), READONLY}, |
| {"__flags__", T_LONG, offsetof(PyTypeObject, tp_flags), READONLY}, |
| {"__doc__", T_STRING, offsetof(PyTypeObject, tp_doc), READONLY}, |
| {"__weakrefoffset__", T_LONG, |
| offsetof(PyTypeObject, tp_weaklistoffset), READONLY}, |
| {"__base__", T_OBJECT, offsetof(PyTypeObject, tp_base), READONLY}, |
| {"__dictoffset__", T_LONG, |
| offsetof(PyTypeObject, tp_dictoffset), READONLY}, |
| {"__bases__", T_OBJECT, offsetof(PyTypeObject, tp_bases), READONLY}, |
| {"__mro__", T_OBJECT, offsetof(PyTypeObject, tp_mro), READONLY}, |
| {0} |
| }; |
| |
| static PyObject * |
| type_name(PyTypeObject *type, void *context) |
| { |
| char *s; |
| |
| s = strrchr(type->tp_name, '.'); |
| if (s == NULL) |
| s = type->tp_name; |
| else |
| s++; |
| return PyString_FromString(s); |
| } |
| |
| static PyObject * |
| type_module(PyTypeObject *type, void *context) |
| { |
| PyObject *mod; |
| char *s; |
| |
| s = strrchr(type->tp_name, '.'); |
| if (s != NULL) |
| return PyString_FromStringAndSize(type->tp_name, |
| (int)(s - type->tp_name)); |
| if (!(type->tp_flags & Py_TPFLAGS_HEAPTYPE)) |
| return PyString_FromString("__builtin__"); |
| mod = PyDict_GetItemString(type->tp_defined, "__module__"); |
| if (mod != NULL && PyString_Check(mod)) { |
| Py_INCREF(mod); |
| return mod; |
| } |
| PyErr_SetString(PyExc_AttributeError, "__module__"); |
| return NULL; |
| } |
| |
| static PyObject * |
| type_dict(PyTypeObject *type, void *context) |
| { |
| if (type->tp_dict == NULL) { |
| Py_INCREF(Py_None); |
| return Py_None; |
| } |
| if (type->tp_flags & Py_TPFLAGS_DYNAMICTYPE) { |
| Py_INCREF(type->tp_dict); |
| return type->tp_dict; |
| } |
| return PyDictProxy_New(type->tp_dict); |
| } |
| |
| static PyObject * |
| type_defined(PyTypeObject *type, void *context) |
| { |
| if (type->tp_defined == NULL) { |
| Py_INCREF(Py_None); |
| return Py_None; |
| } |
| if (type->tp_flags & Py_TPFLAGS_DYNAMICTYPE) { |
| Py_INCREF(type->tp_defined); |
| return type->tp_defined; |
| } |
| return PyDictProxy_New(type->tp_defined); |
| } |
| |
| static PyObject * |
| type_dynamic(PyTypeObject *type, void *context) |
| { |
| PyObject *res; |
| |
| res = (type->tp_flags & Py_TPFLAGS_DYNAMICTYPE) ? Py_True : Py_False; |
| Py_INCREF(res); |
| return res; |
| } |
| |
| struct getsetlist type_getsets[] = { |
| {"__name__", (getter)type_name, NULL, NULL}, |
| {"__module__", (getter)type_module, NULL, NULL}, |
| {"__dict__", (getter)type_dict, NULL, NULL}, |
| {"__defined__", (getter)type_defined, NULL, NULL}, |
| {"__dynamic__", (getter)type_dynamic, NULL, NULL}, |
| {0} |
| }; |
| |
| static int |
| type_compare(PyObject *v, PyObject *w) |
| { |
| /* This is called with type objects only. So we |
| can just compare the addresses. */ |
| Py_uintptr_t vv = (Py_uintptr_t)v; |
| Py_uintptr_t ww = (Py_uintptr_t)w; |
| return (vv < ww) ? -1 : (vv > ww) ? 1 : 0; |
| } |
| |
| static PyObject * |
| type_repr(PyTypeObject *type) |
| { |
| PyObject *mod, *name, *rtn; |
| |
| mod = type_module(type, NULL); |
| if (mod == NULL) |
| PyErr_Clear(); |
| else if (!PyString_Check(mod)) { |
| Py_DECREF(mod); |
| mod = NULL; |
| } |
| name = type_name(type, NULL); |
| if (name == NULL) |
| return NULL; |
| |
| if (mod != NULL && strcmp(PyString_AS_STRING(mod), "__builtin__")) { |
| rtn = PyString_FromFormat("<type '%s.%s'>", |
| PyString_AS_STRING(mod), |
| PyString_AS_STRING(name)); |
| } |
| else |
| rtn = PyString_FromFormat("<type '%s'>", type->tp_name); |
| |
| Py_XDECREF(mod); |
| Py_DECREF(name); |
| return rtn; |
| } |
| |
| static PyObject * |
| type_call(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| { |
| PyObject *obj; |
| |
| if (type->tp_new == NULL) { |
| PyErr_Format(PyExc_TypeError, |
| "cannot create '%.100s' instances", |
| type->tp_name); |
| return NULL; |
| } |
| |
| obj = type->tp_new(type, args, NULL); |
| if (obj != NULL) { |
| type = obj->ob_type; |
| if (type->tp_init != NULL && |
| type->tp_init(obj, args, kwds) < 0) { |
| Py_DECREF(obj); |
| obj = NULL; |
| } |
| } |
| return obj; |
| } |
| |
| PyObject * |
| PyType_GenericAlloc(PyTypeObject *type, int nitems) |
| { |
| #define PTRSIZE (sizeof(PyObject *)) |
| |
| int size; |
| PyObject *obj; |
| |
| /* Inline PyObject_New() so we can zero the memory */ |
| size = _PyObject_VAR_SIZE(type, nitems); |
| /* Round up size, if necessary, so we fully zero out __dict__ */ |
| if (type->tp_itemsize % PTRSIZE != 0) { |
| size += PTRSIZE - 1; |
| size /= PTRSIZE; |
| size *= PTRSIZE; |
| } |
| if (PyType_IS_GC(type)) { |
| obj = _PyObject_GC_Malloc(type, nitems); |
| } |
| else { |
| obj = PyObject_MALLOC(size); |
| } |
| if (obj == NULL) |
| return PyErr_NoMemory(); |
| memset(obj, '\0', size); |
| if (type->tp_flags & Py_TPFLAGS_HEAPTYPE) |
| Py_INCREF(type); |
| if (type->tp_itemsize == 0) |
| PyObject_INIT(obj, type); |
| else |
| (void) PyObject_INIT_VAR((PyVarObject *)obj, type, nitems); |
| if (PyType_IS_GC(type)) |
| _PyObject_GC_TRACK(obj); |
| return obj; |
| } |
| |
| PyObject * |
| PyType_GenericNew(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| { |
| return type->tp_alloc(type, 0); |
| } |
| |
| /* Helper for subtyping */ |
| |
| static void |
| subtype_dealloc(PyObject *self) |
| { |
| PyTypeObject *type, *base; |
| destructor f; |
| |
| /* This exists so we can DECREF self->ob_type */ |
| |
| /* Find the nearest base with a different tp_dealloc */ |
| type = self->ob_type; |
| base = type->tp_base; |
| while ((f = base->tp_dealloc) == subtype_dealloc) { |
| base = base->tp_base; |
| assert(base); |
| } |
| |
| /* If we added a dict, DECREF it */ |
| if (type->tp_dictoffset && !base->tp_dictoffset) { |
| PyObject **dictptr = _PyObject_GetDictPtr(self); |
| if (dictptr != NULL) { |
| PyObject *dict = *dictptr; |
| if (dict != NULL) { |
| Py_DECREF(dict); |
| *dictptr = NULL; |
| } |
| } |
| } |
| |
| /* If we added weaklist, we clear it */ |
| if (type->tp_weaklistoffset && !base->tp_weaklistoffset) |
| PyObject_ClearWeakRefs(self); |
| |
| /* Finalize GC if the base doesn't do GC and we do */ |
| if (PyType_IS_GC(type) && !PyType_IS_GC(base)) |
| PyObject_GC_Fini(self); |
| |
| /* Call the base tp_dealloc() */ |
| assert(f); |
| f(self); |
| |
| /* Can't reference self beyond this point */ |
| if (type->tp_flags & Py_TPFLAGS_HEAPTYPE) { |
| Py_DECREF(type); |
| } |
| } |
| |
| staticforward void override_slots(PyTypeObject *type, PyObject *dict); |
| staticforward PyTypeObject *solid_base(PyTypeObject *type); |
| |
| typedef struct { |
| PyTypeObject type; |
| PyNumberMethods as_number; |
| PySequenceMethods as_sequence; |
| PyMappingMethods as_mapping; |
| PyBufferProcs as_buffer; |
| PyObject *name, *slots; |
| struct memberlist members[1]; |
| } etype; |
| |
| /* type test with subclassing support */ |
| |
| int |
| PyType_IsSubtype(PyTypeObject *a, PyTypeObject *b) |
| { |
| PyObject *mro; |
| |
| if (!(a->tp_flags & Py_TPFLAGS_HAVE_CLASS)) |
| return b == a || b == &PyBaseObject_Type; |
| |
| mro = a->tp_mro; |
| if (mro != NULL) { |
| /* Deal with multiple inheritance without recursion |
| by walking the MRO tuple */ |
| int i, n; |
| assert(PyTuple_Check(mro)); |
| n = PyTuple_GET_SIZE(mro); |
| for (i = 0; i < n; i++) { |
| if (PyTuple_GET_ITEM(mro, i) == (PyObject *)b) |
| return 1; |
| } |
| return 0; |
| } |
| else { |
| /* a is not completely initilized yet; follow tp_base */ |
| do { |
| if (a == b) |
| return 1; |
| a = a->tp_base; |
| } while (a != NULL); |
| return b == &PyBaseObject_Type; |
| } |
| } |
| |
| /* Internal routine to do a method lookup in the type |
| without looking in the instance dictionary |
| (so we can't use PyObject_GetAttr) but still binding |
| it to the instance. The arguments are the object, |
| the method name as a C string, and the address of a |
| static variable used to cache the interned Python string. */ |
| |
| static PyObject * |
| lookup_method(PyObject *self, char *attrstr, PyObject **attrobj) |
| { |
| PyObject *res; |
| |
| if (*attrobj == NULL) { |
| *attrobj = PyString_InternFromString(attrstr); |
| if (*attrobj == NULL) |
| return NULL; |
| } |
| res = _PyType_Lookup(self->ob_type, *attrobj); |
| if (res == NULL) |
| PyErr_SetObject(PyExc_AttributeError, *attrobj); |
| else { |
| descrgetfunc f; |
| if ((f = res->ob_type->tp_descr_get) == NULL) |
| Py_INCREF(res); |
| else |
| res = f(res, self, (PyObject *)(self->ob_type)); |
| } |
| return res; |
| } |
| |
| /* A variation of PyObject_CallMethod that uses lookup_method() |
| instead of PyObject_GetAttrString(). This uses the same convention |
| as lookup_method to cache the interned name string object. */ |
| |
| PyObject * |
| call_method(PyObject *o, char *name, PyObject **nameobj, char *format, ...) |
| { |
| va_list va; |
| PyObject *args, *func = 0, *retval; |
| PyObject *dummy_str = NULL; |
| va_start(va, format); |
| |
| func = lookup_method(o, name, &dummy_str); |
| Py_XDECREF(dummy_str); |
| if (func == NULL) { |
| va_end(va); |
| PyErr_SetString(PyExc_AttributeError, name); |
| return 0; |
| } |
| |
| if (format && *format) |
| args = Py_VaBuildValue(format, va); |
| else |
| args = PyTuple_New(0); |
| |
| va_end(va); |
| |
| if (!args) |
| return NULL; |
| |
| if (!PyTuple_Check(args)) { |
| PyObject *a; |
| |
| a = PyTuple_New(1); |
| if (a == NULL) |
| return NULL; |
| if (PyTuple_SetItem(a, 0, args) < 0) |
| return NULL; |
| args = a; |
| } |
| |
| retval = PyObject_CallObject(func, args); |
| |
| Py_DECREF(args); |
| Py_DECREF(func); |
| |
| return retval; |
| } |
| |
| /* Method resolution order algorithm from "Putting Metaclasses to Work" |
| by Forman and Danforth (Addison-Wesley 1999). */ |
| |
| static int |
| conservative_merge(PyObject *left, PyObject *right) |
| { |
| int left_size; |
| int right_size; |
| int i, j, r, ok; |
| PyObject *temp, *rr; |
| |
| assert(PyList_Check(left)); |
| assert(PyList_Check(right)); |
| |
| again: |
| left_size = PyList_GET_SIZE(left); |
| right_size = PyList_GET_SIZE(right); |
| for (i = 0; i < left_size; i++) { |
| for (j = 0; j < right_size; j++) { |
| if (PyList_GET_ITEM(left, i) == |
| PyList_GET_ITEM(right, j)) { |
| /* found a merge point */ |
| temp = PyList_New(0); |
| if (temp == NULL) |
| return -1; |
| for (r = 0; r < j; r++) { |
| rr = PyList_GET_ITEM(right, r); |
| ok = PySequence_Contains(left, rr); |
| if (ok < 0) { |
| Py_DECREF(temp); |
| return -1; |
| } |
| if (!ok) { |
| ok = PyList_Append(temp, rr); |
| if (ok < 0) { |
| Py_DECREF(temp); |
| return -1; |
| } |
| } |
| } |
| ok = PyList_SetSlice(left, i, i, temp); |
| Py_DECREF(temp); |
| if (ok < 0) |
| return -1; |
| ok = PyList_SetSlice(right, 0, j+1, NULL); |
| if (ok < 0) |
| return -1; |
| goto again; |
| } |
| } |
| } |
| return PyList_SetSlice(left, left_size, left_size, right); |
| } |
| |
| static int |
| serious_order_disagreements(PyObject *left, PyObject *right) |
| { |
| return 0; /* XXX later -- for now, we cheat: "don't do that" */ |
| } |
| |
| static PyObject * |
| mro_implementation(PyTypeObject *type) |
| { |
| int i, n, ok; |
| PyObject *bases, *result; |
| |
| bases = type->tp_bases; |
| n = PyTuple_GET_SIZE(bases); |
| result = Py_BuildValue("[O]", (PyObject *)type); |
| if (result == NULL) |
| return NULL; |
| for (i = 0; i < n; i++) { |
| PyTypeObject *base = |
| (PyTypeObject *) PyTuple_GET_ITEM(bases, i); |
| PyObject *parentMRO = PySequence_List(base->tp_mro); |
| if (parentMRO == NULL) { |
| Py_DECREF(result); |
| return NULL; |
| } |
| if (serious_order_disagreements(result, parentMRO)) { |
| Py_DECREF(result); |
| return NULL; |
| } |
| ok = conservative_merge(result, parentMRO); |
| Py_DECREF(parentMRO); |
| if (ok < 0) { |
| Py_DECREF(result); |
| return NULL; |
| } |
| } |
| return result; |
| } |
| |
| static PyObject * |
| mro_external(PyObject *self) |
| { |
| PyTypeObject *type = (PyTypeObject *)self; |
| |
| return mro_implementation(type); |
| } |
| |
| static int |
| mro_internal(PyTypeObject *type) |
| { |
| PyObject *mro, *result, *tuple; |
| |
| if (type->ob_type == &PyType_Type) { |
| result = mro_implementation(type); |
| } |
| else { |
| static PyObject *mro_str; |
| mro = lookup_method((PyObject *)type, "mro", &mro_str); |
| if (mro == NULL) |
| return -1; |
| result = PyObject_CallObject(mro, NULL); |
| Py_DECREF(mro); |
| } |
| if (result == NULL) |
| return -1; |
| tuple = PySequence_Tuple(result); |
| Py_DECREF(result); |
| type->tp_mro = tuple; |
| return 0; |
| } |
| |
| |
| /* Calculate the best base amongst multiple base classes. |
| This is the first one that's on the path to the "solid base". */ |
| |
| static PyTypeObject * |
| best_base(PyObject *bases) |
| { |
| int i, n; |
| PyTypeObject *base, *winner, *candidate, *base_i; |
| |
| assert(PyTuple_Check(bases)); |
| n = PyTuple_GET_SIZE(bases); |
| assert(n > 0); |
| base = (PyTypeObject *)PyTuple_GET_ITEM(bases, 0); |
| winner = &PyBaseObject_Type; |
| for (i = 0; i < n; i++) { |
| base_i = (PyTypeObject *)PyTuple_GET_ITEM(bases, i); |
| if (!PyType_Check((PyObject *)base_i)) { |
| PyErr_SetString( |
| PyExc_TypeError, |
| "bases must be types"); |
| return NULL; |
| } |
| if (base_i->tp_dict == NULL) { |
| if (PyType_Ready(base_i) < 0) |
| return NULL; |
| } |
| candidate = solid_base(base_i); |
| if (PyType_IsSubtype(winner, candidate)) |
| ; |
| else if (PyType_IsSubtype(candidate, winner)) { |
| winner = candidate; |
| base = base_i; |
| } |
| else { |
| PyErr_SetString( |
| PyExc_TypeError, |
| "multiple bases have " |
| "instance lay-out conflict"); |
| return NULL; |
| } |
| } |
| assert(base != NULL); |
| return base; |
| } |
| |
| static int |
| extra_ivars(PyTypeObject *type, PyTypeObject *base) |
| { |
| size_t t_size = type->tp_basicsize; |
| size_t b_size = base->tp_basicsize; |
| |
| assert(t_size >= b_size); /* Else type smaller than base! */ |
| if (type->tp_itemsize || base->tp_itemsize) { |
| /* If itemsize is involved, stricter rules */ |
| return t_size != b_size || |
| type->tp_itemsize != base->tp_itemsize; |
| } |
| if (type->tp_weaklistoffset && base->tp_weaklistoffset == 0 && |
| type->tp_weaklistoffset + sizeof(PyObject *) == t_size) |
| t_size -= sizeof(PyObject *); |
| if (type->tp_dictoffset && base->tp_dictoffset == 0 && |
| type->tp_dictoffset + sizeof(PyObject *) == t_size) |
| t_size -= sizeof(PyObject *); |
| |
| return t_size != b_size; |
| } |
| |
| static PyTypeObject * |
| solid_base(PyTypeObject *type) |
| { |
| PyTypeObject *base; |
| |
| if (type->tp_base) |
| base = solid_base(type->tp_base); |
| else |
| base = &PyBaseObject_Type; |
| if (extra_ivars(type, base)) |
| return type; |
| else |
| return base; |
| } |
| |
| staticforward void object_dealloc(PyObject *); |
| staticforward int object_init(PyObject *, PyObject *, PyObject *); |
| |
| static PyObject * |
| subtype_dict(PyObject *obj, void *context) |
| { |
| PyObject **dictptr = _PyObject_GetDictPtr(obj); |
| PyObject *dict; |
| |
| if (dictptr == NULL) { |
| PyErr_SetString(PyExc_AttributeError, |
| "This object has no __dict__"); |
| return NULL; |
| } |
| dict = *dictptr; |
| if (dict == NULL) { |
| Py_INCREF(Py_None); |
| return Py_None; |
| } |
| else { |
| Py_INCREF(dict); |
| return dict; |
| } |
| } |
| |
| struct getsetlist subtype_getsets[] = { |
| {"__dict__", subtype_dict, NULL, NULL}, |
| {0}, |
| }; |
| |
| static PyObject * |
| type_new(PyTypeObject *metatype, PyObject *args, PyObject *kwds) |
| { |
| PyObject *name, *bases, *dict; |
| static char *kwlist[] = {"name", "bases", "dict", 0}; |
| PyObject *slots, *tmp; |
| PyTypeObject *type, *base, *tmptype, *winner; |
| etype *et; |
| struct memberlist *mp; |
| int i, nbases, nslots, slotoffset, dynamic, add_dict, add_weak; |
| |
| /* Special case: type(x) should return x->ob_type */ |
| if (metatype == &PyType_Type && |
| PyTuple_Check(args) && PyTuple_GET_SIZE(args) == 1 && |
| (kwds == NULL || (PyDict_Check(kwds) && PyDict_Size(kwds) == 0))) { |
| PyObject *x = PyTuple_GET_ITEM(args, 0); |
| Py_INCREF(x->ob_type); |
| return (PyObject *) x->ob_type; |
| } |
| |
| /* Check arguments: (name, bases, dict) */ |
| if (!PyArg_ParseTupleAndKeywords(args, kwds, "SO!O!:type", kwlist, |
| &name, |
| &PyTuple_Type, &bases, |
| &PyDict_Type, &dict)) |
| return NULL; |
| |
| /* Determine the proper metatype to deal with this, |
| and check for metatype conflicts while we're at it. |
| Note that if some other metatype wins to contract, |
| it's possible that its instances are not types. */ |
| nbases = PyTuple_GET_SIZE(bases); |
| winner = metatype; |
| for (i = 0; i < nbases; i++) { |
| tmp = PyTuple_GET_ITEM(bases, i); |
| tmptype = tmp->ob_type; |
| if (PyType_IsSubtype(winner, tmptype)) |
| continue; |
| if (PyType_IsSubtype(tmptype, winner)) { |
| winner = tmptype; |
| continue; |
| } |
| PyErr_SetString(PyExc_TypeError, |
| "metatype conflict among bases"); |
| return NULL; |
| } |
| if (winner != metatype) { |
| if (winner->tp_new != type_new) /* Pass it to the winner */ |
| return winner->tp_new(winner, args, kwds); |
| metatype = winner; |
| } |
| |
| /* Adjust for empty tuple bases */ |
| if (nbases == 0) { |
| bases = Py_BuildValue("(O)", &PyBaseObject_Type); |
| if (bases == NULL) |
| return NULL; |
| nbases = 1; |
| } |
| else |
| Py_INCREF(bases); |
| |
| /* XXX From here until type is allocated, "return NULL" leaks bases! */ |
| |
| /* Calculate best base, and check that all bases are type objects */ |
| base = best_base(bases); |
| if (base == NULL) |
| return NULL; |
| if (!PyType_HasFeature(base, Py_TPFLAGS_BASETYPE)) { |
| PyErr_Format(PyExc_TypeError, |
| "type '%.100s' is not an acceptable base type", |
| base->tp_name); |
| return NULL; |
| } |
| |
| /* Should this be a dynamic class (i.e. modifiable __dict__)? |
| Look in two places for a variable named __dynamic__: |
| 1) in the class dict |
| 2) in the module dict (globals) |
| The first variable that is an int >= 0 is used. |
| Otherwise, a default is calculated from the base classes: |
| if any base class is dynamic, this class is dynamic; otherwise |
| it is static. */ |
| dynamic = -1; /* Not yet determined */ |
| /* Look in the class */ |
| tmp = PyDict_GetItemString(dict, "__dynamic__"); |
| if (tmp != NULL) { |
| dynamic = PyInt_AsLong(tmp); |
| if (dynamic < 0) |
| PyErr_Clear(); |
| } |
| if (dynamic < 0) { |
| /* Look in the module globals */ |
| tmp = PyEval_GetGlobals(); |
| if (tmp != NULL) { |
| tmp = PyDict_GetItemString(tmp, "__dynamic__"); |
| if (tmp != NULL) { |
| dynamic = PyInt_AsLong(tmp); |
| if (dynamic < 0) |
| PyErr_Clear(); |
| } |
| } |
| } |
| if (dynamic < 0) { |
| /* Make a new class dynamic if any of its bases is |
| dynamic. This is not always the same as inheriting |
| the __dynamic__ class attribute! */ |
| dynamic = 0; |
| for (i = 0; i < nbases; i++) { |
| tmptype = (PyTypeObject *) |
| PyTuple_GET_ITEM(bases, i); |
| if (tmptype->tp_flags & |
| Py_TPFLAGS_DYNAMICTYPE) { |
| dynamic = 1; |
| break; |
| } |
| } |
| } |
| |
| /* Check for a __slots__ sequence variable in dict, and count it */ |
| slots = PyDict_GetItemString(dict, "__slots__"); |
| nslots = 0; |
| add_dict = 0; |
| add_weak = 0; |
| if (slots != NULL) { |
| /* Make it into a tuple */ |
| if (PyString_Check(slots)) |
| slots = Py_BuildValue("(O)", slots); |
| else |
| slots = PySequence_Tuple(slots); |
| if (slots == NULL) |
| return NULL; |
| nslots = PyTuple_GET_SIZE(slots); |
| if (nslots > 0 && base->tp_itemsize != 0) { |
| PyErr_Format(PyExc_TypeError, |
| "nonempty __slots__ " |
| "not supported for subtype of '%s'", |
| base->tp_name); |
| return NULL; |
| } |
| for (i = 0; i < nslots; i++) { |
| if (!PyString_Check(PyTuple_GET_ITEM(slots, i))) { |
| PyErr_SetString(PyExc_TypeError, |
| "__slots__ must be a sequence of strings"); |
| Py_DECREF(slots); |
| return NULL; |
| } |
| /* XXX Check against null bytes in name */ |
| } |
| } |
| if (slots == NULL && base->tp_dictoffset == 0 && |
| (base->tp_setattro == PyObject_GenericSetAttr || |
| base->tp_setattro == NULL)) { |
| add_dict++; |
| } |
| if (slots == NULL && base->tp_weaklistoffset == 0 && |
| base->tp_itemsize == 0) { |
| nslots++; |
| add_weak++; |
| } |
| |
| /* XXX From here until type is safely allocated, |
| "return NULL" may leak slots! */ |
| |
| /* Allocate the type object */ |
| type = (PyTypeObject *)metatype->tp_alloc(metatype, nslots); |
| if (type == NULL) |
| return NULL; |
| |
| /* Keep name and slots alive in the extended type object */ |
| et = (etype *)type; |
| Py_INCREF(name); |
| et->name = name; |
| et->slots = slots; |
| |
| /* Initialize tp_flags */ |
| type->tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HEAPTYPE | |
| Py_TPFLAGS_BASETYPE; |
| if (dynamic) |
| type->tp_flags |= Py_TPFLAGS_DYNAMICTYPE; |
| |
| /* It's a new-style number unless it specifically inherits any |
| old-style numeric behavior */ |
| if ((base->tp_flags & Py_TPFLAGS_CHECKTYPES) || |
| (base->tp_as_number == NULL)) |
| type->tp_flags |= Py_TPFLAGS_CHECKTYPES; |
| |
| /* Initialize essential fields */ |
| type->tp_as_number = &et->as_number; |
| type->tp_as_sequence = &et->as_sequence; |
| type->tp_as_mapping = &et->as_mapping; |
| type->tp_as_buffer = &et->as_buffer; |
| type->tp_name = PyString_AS_STRING(name); |
| |
| /* Set tp_base and tp_bases */ |
| type->tp_bases = bases; |
| Py_INCREF(base); |
| type->tp_base = base; |
| |
| /* Initialize tp_defined from passed-in dict */ |
| type->tp_defined = dict = PyDict_Copy(dict); |
| if (dict == NULL) { |
| Py_DECREF(type); |
| return NULL; |
| } |
| |
| /* Set __module__ in the dict */ |
| if (PyDict_GetItemString(dict, "__module__") == NULL) { |
| tmp = PyEval_GetGlobals(); |
| if (tmp != NULL) { |
| tmp = PyDict_GetItemString(tmp, "__name__"); |
| if (tmp != NULL) { |
| if (PyDict_SetItemString(dict, "__module__", |
| tmp) < 0) |
| return NULL; |
| } |
| } |
| } |
| |
| /* Special-case __new__: if it's a plain function, |
| make it a static function */ |
| tmp = PyDict_GetItemString(dict, "__new__"); |
| if (tmp != NULL && PyFunction_Check(tmp)) { |
| tmp = PyStaticMethod_New(tmp); |
| if (tmp == NULL) { |
| Py_DECREF(type); |
| return NULL; |
| } |
| PyDict_SetItemString(dict, "__new__", tmp); |
| Py_DECREF(tmp); |
| } |
| |
| /* Add descriptors for custom slots from __slots__, or for __dict__ */ |
| mp = et->members; |
| slotoffset = base->tp_basicsize; |
| if (slots != NULL) { |
| for (i = 0; i < nslots; i++, mp++) { |
| mp->name = PyString_AS_STRING( |
| PyTuple_GET_ITEM(slots, i)); |
| mp->type = T_OBJECT; |
| mp->offset = slotoffset; |
| if (base->tp_weaklistoffset == 0 && |
| strcmp(mp->name, "__weakref__") == 0) |
| type->tp_weaklistoffset = slotoffset; |
| slotoffset += sizeof(PyObject *); |
| } |
| } |
| else { |
| if (add_dict) { |
| if (base->tp_itemsize) |
| type->tp_dictoffset = -(long)sizeof(PyObject *); |
| else |
| type->tp_dictoffset = slotoffset; |
| slotoffset += sizeof(PyObject *); |
| type->tp_getset = subtype_getsets; |
| } |
| if (add_weak) { |
| assert(!base->tp_itemsize); |
| type->tp_weaklistoffset = slotoffset; |
| mp->name = "__weakref__"; |
| mp->type = T_OBJECT; |
| mp->offset = slotoffset; |
| mp->readonly = 1; |
| mp++; |
| slotoffset += sizeof(PyObject *); |
| } |
| } |
| type->tp_basicsize = slotoffset; |
| type->tp_itemsize = base->tp_itemsize; |
| type->tp_members = et->members; |
| |
| /* Special case some slots */ |
| if (type->tp_dictoffset != 0 || nslots > 0) { |
| if (base->tp_getattr == NULL && base->tp_getattro == NULL) |
| type->tp_getattro = PyObject_GenericGetAttr; |
| if (base->tp_setattr == NULL && base->tp_setattro == NULL) |
| type->tp_setattro = PyObject_GenericSetAttr; |
| } |
| type->tp_dealloc = subtype_dealloc; |
| |
| /* Always override allocation strategy to use regular heap */ |
| type->tp_alloc = PyType_GenericAlloc; |
| type->tp_free = _PyObject_Del; |
| |
| /* Initialize the rest */ |
| if (PyType_Ready(type) < 0) { |
| Py_DECREF(type); |
| return NULL; |
| } |
| |
| /* Override slots that deserve it */ |
| if (!PyType_HasFeature(type, Py_TPFLAGS_DYNAMICTYPE)) |
| override_slots(type, type->tp_defined); |
| |
| return (PyObject *)type; |
| } |
| |
| /* Internal API to look for a name through the MRO. |
| This returns a borrowed reference, and doesn't set an exception! */ |
| PyObject * |
| _PyType_Lookup(PyTypeObject *type, PyObject *name) |
| { |
| int i, n; |
| PyObject *mro, *res, *dict; |
| |
| /* For static types, look in tp_dict */ |
| if (!(type->tp_flags & Py_TPFLAGS_DYNAMICTYPE)) { |
| dict = type->tp_dict; |
| assert(dict && PyDict_Check(dict)); |
| return PyDict_GetItem(dict, name); |
| } |
| |
| /* For dynamic types, look in tp_defined of types in MRO */ |
| mro = type->tp_mro; |
| assert(PyTuple_Check(mro)); |
| n = PyTuple_GET_SIZE(mro); |
| for (i = 0; i < n; i++) { |
| type = (PyTypeObject *) PyTuple_GET_ITEM(mro, i); |
| assert(PyType_Check(type)); |
| dict = type->tp_defined; |
| assert(dict && PyDict_Check(dict)); |
| res = PyDict_GetItem(dict, name); |
| if (res != NULL) |
| return res; |
| } |
| return NULL; |
| } |
| |
| /* This is similar to PyObject_GenericGetAttr(), |
| but uses _PyType_Lookup() instead of just looking in type->tp_dict. */ |
| static PyObject * |
| type_getattro(PyTypeObject *type, PyObject *name) |
| { |
| PyTypeObject *metatype = type->ob_type; |
| PyObject *descr, *res; |
| descrgetfunc f; |
| |
| /* Initialize this type (we'll assume the metatype is initialized) */ |
| if (type->tp_dict == NULL) { |
| if (PyType_Ready(type) < 0) |
| return NULL; |
| } |
| |
| /* Get a descriptor from the metatype */ |
| descr = _PyType_Lookup(metatype, name); |
| f = NULL; |
| if (descr != NULL) { |
| f = descr->ob_type->tp_descr_get; |
| if (f != NULL && PyDescr_IsData(descr)) |
| return f(descr, |
| (PyObject *)type, (PyObject *)metatype); |
| } |
| |
| /* Look in tp_defined of this type and its bases */ |
| res = _PyType_Lookup(type, name); |
| if (res != NULL) { |
| f = res->ob_type->tp_descr_get; |
| if (f != NULL) |
| return f(res, (PyObject *)NULL, (PyObject *)type); |
| Py_INCREF(res); |
| return res; |
| } |
| |
| /* Use the descriptor from the metatype */ |
| if (f != NULL) { |
| res = f(descr, (PyObject *)type, (PyObject *)metatype); |
| return res; |
| } |
| if (descr != NULL) { |
| Py_INCREF(descr); |
| return descr; |
| } |
| |
| /* Give up */ |
| PyErr_Format(PyExc_AttributeError, |
| "type object '%.50s' has no attribute '%.400s'", |
| type->tp_name, PyString_AS_STRING(name)); |
| return NULL; |
| } |
| |
| static int |
| type_setattro(PyTypeObject *type, PyObject *name, PyObject *value) |
| { |
| if (type->tp_flags & Py_TPFLAGS_DYNAMICTYPE) |
| return PyObject_GenericSetAttr((PyObject *)type, name, value); |
| PyErr_SetString(PyExc_TypeError, "can't set type attributes"); |
| return -1; |
| } |
| |
| static void |
| type_dealloc(PyTypeObject *type) |
| { |
| etype *et; |
| |
| /* Assert this is a heap-allocated type object */ |
| assert(type->tp_flags & Py_TPFLAGS_HEAPTYPE); |
| et = (etype *)type; |
| Py_XDECREF(type->tp_base); |
| Py_XDECREF(type->tp_dict); |
| Py_XDECREF(type->tp_bases); |
| Py_XDECREF(type->tp_mro); |
| Py_XDECREF(type->tp_defined); |
| /* XXX more? */ |
| Py_XDECREF(et->name); |
| Py_XDECREF(et->slots); |
| type->ob_type->tp_free((PyObject *)type); |
| } |
| |
| static PyMethodDef type_methods[] = { |
| {"mro", (PyCFunction)mro_external, METH_NOARGS, |
| "mro() -> list\nreturn a type's method resolution order"}, |
| {0} |
| }; |
| |
| static char type_doc[] = |
| "type(object) -> the object's type\n" |
| "type(name, bases, dict) -> a new type"; |
| |
| PyTypeObject PyType_Type = { |
| PyObject_HEAD_INIT(&PyType_Type) |
| 0, /* ob_size */ |
| "type", /* tp_name */ |
| sizeof(etype), /* tp_basicsize */ |
| sizeof(struct memberlist), /* tp_itemsize */ |
| (destructor)type_dealloc, /* tp_dealloc */ |
| 0, /* tp_print */ |
| 0, /* tp_getattr */ |
| 0, /* tp_setattr */ |
| type_compare, /* tp_compare */ |
| (reprfunc)type_repr, /* tp_repr */ |
| 0, /* tp_as_number */ |
| 0, /* tp_as_sequence */ |
| 0, /* tp_as_mapping */ |
| (hashfunc)_Py_HashPointer, /* tp_hash */ |
| (ternaryfunc)type_call, /* tp_call */ |
| 0, /* tp_str */ |
| (getattrofunc)type_getattro, /* tp_getattro */ |
| (setattrofunc)type_setattro, /* tp_setattro */ |
| 0, /* tp_as_buffer */ |
| Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
| type_doc, /* tp_doc */ |
| 0, /* tp_traverse */ |
| 0, /* tp_clear */ |
| 0, /* tp_richcompare */ |
| 0, /* tp_weaklistoffset */ |
| 0, /* tp_iter */ |
| 0, /* tp_iternext */ |
| type_methods, /* tp_methods */ |
| type_members, /* tp_members */ |
| type_getsets, /* tp_getset */ |
| 0, /* tp_base */ |
| 0, /* tp_dict */ |
| 0, /* tp_descr_get */ |
| 0, /* tp_descr_set */ |
| offsetof(PyTypeObject, tp_dict), /* tp_dictoffset */ |
| 0, /* tp_init */ |
| 0, /* tp_alloc */ |
| type_new, /* tp_new */ |
| }; |
| |
| |
| /* The base type of all types (eventually)... except itself. */ |
| |
| static int |
| object_init(PyObject *self, PyObject *args, PyObject *kwds) |
| { |
| return 0; |
| } |
| |
| static void |
| object_dealloc(PyObject *self) |
| { |
| self->ob_type->tp_free(self); |
| } |
| |
| static PyObject * |
| object_repr(PyObject *self) |
| { |
| PyTypeObject *type; |
| PyObject *mod, *name, *rtn; |
| |
| type = self->ob_type; |
| mod = type_module(type, NULL); |
| if (mod == NULL) |
| PyErr_Clear(); |
| else if (!PyString_Check(mod)) { |
| Py_DECREF(mod); |
| mod = NULL; |
| } |
| name = type_name(type, NULL); |
| if (name == NULL) |
| return NULL; |
| if (mod != NULL && strcmp(PyString_AS_STRING(mod), "__builtin__")) |
| rtn = PyString_FromFormat("<%s.%s instance at %p>", |
| PyString_AS_STRING(mod), |
| PyString_AS_STRING(name), |
| self); |
| else |
| rtn = PyString_FromFormat("<%s instance at %p>", |
| type->tp_name, self); |
| Py_XDECREF(mod); |
| Py_DECREF(name); |
| return rtn; |
| } |
| |
| static PyObject * |
| object_str(PyObject *self) |
| { |
| unaryfunc f; |
| |
| f = self->ob_type->tp_repr; |
| if (f == NULL) |
| f = object_repr; |
| return f(self); |
| } |
| |
| static long |
| object_hash(PyObject *self) |
| { |
| return _Py_HashPointer(self); |
| } |
| |
| static void |
| object_free(PyObject *self) |
| { |
| PyObject_Del(self); |
| } |
| |
| static struct memberlist object_members[] = { |
| {"__class__", T_OBJECT, offsetof(PyObject, ob_type), READONLY}, |
| {0} |
| }; |
| |
| PyTypeObject PyBaseObject_Type = { |
| PyObject_HEAD_INIT(&PyType_Type) |
| 0, /* ob_size */ |
| "object", /* tp_name */ |
| sizeof(PyObject), /* tp_basicsize */ |
| 0, /* tp_itemsize */ |
| (destructor)object_dealloc, /* tp_dealloc */ |
| 0, /* tp_print */ |
| 0, /* tp_getattr */ |
| 0, /* tp_setattr */ |
| 0, /* tp_compare */ |
| object_repr, /* tp_repr */ |
| 0, /* tp_as_number */ |
| 0, /* tp_as_sequence */ |
| 0, /* tp_as_mapping */ |
| object_hash, /* tp_hash */ |
| 0, /* tp_call */ |
| object_str, /* tp_str */ |
| PyObject_GenericGetAttr, /* tp_getattro */ |
| PyObject_GenericSetAttr, /* tp_setattro */ |
| 0, /* tp_as_buffer */ |
| Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
| "The most base type", /* tp_doc */ |
| 0, /* tp_traverse */ |
| 0, /* tp_clear */ |
| 0, /* tp_richcompare */ |
| 0, /* tp_weaklistoffset */ |
| 0, /* tp_iter */ |
| 0, /* tp_iternext */ |
| 0, /* tp_methods */ |
| object_members, /* tp_members */ |
| 0, /* tp_getset */ |
| 0, /* tp_base */ |
| 0, /* tp_dict */ |
| 0, /* tp_descr_get */ |
| 0, /* tp_descr_set */ |
| 0, /* tp_dictoffset */ |
| object_init, /* tp_init */ |
| PyType_GenericAlloc, /* tp_alloc */ |
| PyType_GenericNew, /* tp_new */ |
| object_free, /* tp_free */ |
| }; |
| |
| |
| /* Initialize the __dict__ in a type object */ |
| |
| static int |
| add_methods(PyTypeObject *type, PyMethodDef *meth) |
| { |
| PyObject *dict = type->tp_defined; |
| |
| for (; meth->ml_name != NULL; meth++) { |
| PyObject *descr; |
| if (PyDict_GetItemString(dict, meth->ml_name)) |
| continue; |
| descr = PyDescr_NewMethod(type, meth); |
| if (descr == NULL) |
| return -1; |
| if (PyDict_SetItemString(dict,meth->ml_name,descr) < 0) |
| return -1; |
| Py_DECREF(descr); |
| } |
| return 0; |
| } |
| |
| static int |
| add_members(PyTypeObject *type, struct memberlist *memb) |
| { |
| PyObject *dict = type->tp_defined; |
| |
| for (; memb->name != NULL; memb++) { |
| PyObject *descr; |
| if (PyDict_GetItemString(dict, memb->name)) |
| continue; |
| descr = PyDescr_NewMember(type, memb); |
| if (descr == NULL) |
| return -1; |
| if (PyDict_SetItemString(dict, memb->name, descr) < 0) |
| return -1; |
| Py_DECREF(descr); |
| } |
| return 0; |
| } |
| |
| static int |
| add_getset(PyTypeObject *type, struct getsetlist *gsp) |
| { |
| PyObject *dict = type->tp_defined; |
| |
| for (; gsp->name != NULL; gsp++) { |
| PyObject *descr; |
| if (PyDict_GetItemString(dict, gsp->name)) |
| continue; |
| descr = PyDescr_NewGetSet(type, gsp); |
| |
| if (descr == NULL) |
| return -1; |
| if (PyDict_SetItemString(dict, gsp->name, descr) < 0) |
| return -1; |
| Py_DECREF(descr); |
| } |
| return 0; |
| } |
| |
| static void |
| inherit_special(PyTypeObject *type, PyTypeObject *base) |
| { |
| int oldsize, newsize; |
| |
| /* Special flag magic */ |
| if (!type->tp_as_buffer && base->tp_as_buffer) { |
| type->tp_flags &= ~Py_TPFLAGS_HAVE_GETCHARBUFFER; |
| type->tp_flags |= |
| base->tp_flags & Py_TPFLAGS_HAVE_GETCHARBUFFER; |
| } |
| if (!type->tp_as_sequence && base->tp_as_sequence) { |
| type->tp_flags &= ~Py_TPFLAGS_HAVE_SEQUENCE_IN; |
| type->tp_flags |= base->tp_flags & Py_TPFLAGS_HAVE_SEQUENCE_IN; |
| } |
| if ((type->tp_flags & Py_TPFLAGS_HAVE_INPLACEOPS) != |
| (base->tp_flags & Py_TPFLAGS_HAVE_INPLACEOPS)) { |
| if ((!type->tp_as_number && base->tp_as_number) || |
| (!type->tp_as_sequence && base->tp_as_sequence)) { |
| type->tp_flags &= ~Py_TPFLAGS_HAVE_INPLACEOPS; |
| if (!type->tp_as_number && !type->tp_as_sequence) { |
| type->tp_flags |= base->tp_flags & |
| Py_TPFLAGS_HAVE_INPLACEOPS; |
| } |
| } |
| /* Wow */ |
| } |
| if (!type->tp_as_number && base->tp_as_number) { |
| type->tp_flags &= ~Py_TPFLAGS_CHECKTYPES; |
| type->tp_flags |= base->tp_flags & Py_TPFLAGS_CHECKTYPES; |
| } |
| |
| /* Copying basicsize is connected to the GC flags */ |
| oldsize = base->tp_basicsize; |
| newsize = type->tp_basicsize ? type->tp_basicsize : oldsize; |
| if (!(type->tp_flags & Py_TPFLAGS_HAVE_GC) && |
| (base->tp_flags & Py_TPFLAGS_HAVE_GC) && |
| (type->tp_flags & Py_TPFLAGS_HAVE_RICHCOMPARE/*GC slots exist*/) && |
| (!type->tp_traverse && !type->tp_clear)) { |
| type->tp_flags |= Py_TPFLAGS_HAVE_GC; |
| if (type->tp_traverse == NULL) |
| type->tp_traverse = base->tp_traverse; |
| if (type->tp_clear == NULL) |
| type->tp_clear = base->tp_clear; |
| } |
| if (type->tp_flags & base->tp_flags & Py_TPFLAGS_HAVE_CLASS) { |
| if (base != &PyBaseObject_Type || |
| (type->tp_flags & Py_TPFLAGS_HEAPTYPE)) { |
| if (type->tp_new == NULL) |
| type->tp_new = base->tp_new; |
| } |
| } |
| type->tp_basicsize = newsize; |
| |
| /* Copy other non-function slots */ |
| |
| #undef COPYVAL |
| #define COPYVAL(SLOT) \ |
| if (type->SLOT == 0) type->SLOT = base->SLOT |
| |
| COPYVAL(tp_itemsize); |
| if (type->tp_flags & base->tp_flags & Py_TPFLAGS_HAVE_WEAKREFS) { |
| COPYVAL(tp_weaklistoffset); |
| } |
| if (type->tp_flags & base->tp_flags & Py_TPFLAGS_HAVE_CLASS) { |
| COPYVAL(tp_dictoffset); |
| } |
| } |
| |
| static void |
| inherit_slots(PyTypeObject *type, PyTypeObject *base) |
| { |
| PyTypeObject *basebase; |
| |
| #undef SLOTDEFINED |
| #undef COPYSLOT |
| #undef COPYNUM |
| #undef COPYSEQ |
| #undef COPYMAP |
| |
| #define SLOTDEFINED(SLOT) \ |
| (base->SLOT != 0 && \ |
| (basebase == NULL || base->SLOT != basebase->SLOT)) |
| |
| #define COPYSLOT(SLOT) \ |
| if (!type->SLOT && SLOTDEFINED(SLOT)) type->SLOT = base->SLOT |
| |
| #define COPYNUM(SLOT) COPYSLOT(tp_as_number->SLOT) |
| #define COPYSEQ(SLOT) COPYSLOT(tp_as_sequence->SLOT) |
| #define COPYMAP(SLOT) COPYSLOT(tp_as_mapping->SLOT) |
| |
| /* This won't inherit indirect slots (from tp_as_number etc.) |
| if type doesn't provide the space. */ |
| |
| if (type->tp_as_number != NULL && base->tp_as_number != NULL) { |
| basebase = base->tp_base; |
| if (basebase->tp_as_number == NULL) |
| basebase = NULL; |
| COPYNUM(nb_add); |
| COPYNUM(nb_subtract); |
| COPYNUM(nb_multiply); |
| COPYNUM(nb_divide); |
| COPYNUM(nb_remainder); |
| COPYNUM(nb_divmod); |
| COPYNUM(nb_power); |
| COPYNUM(nb_negative); |
| COPYNUM(nb_positive); |
| COPYNUM(nb_absolute); |
| COPYNUM(nb_nonzero); |
| COPYNUM(nb_invert); |
| COPYNUM(nb_lshift); |
| COPYNUM(nb_rshift); |
| COPYNUM(nb_and); |
| COPYNUM(nb_xor); |
| COPYNUM(nb_or); |
| COPYNUM(nb_coerce); |
| COPYNUM(nb_int); |
| COPYNUM(nb_long); |
| COPYNUM(nb_float); |
| COPYNUM(nb_oct); |
| COPYNUM(nb_hex); |
| COPYNUM(nb_inplace_add); |
| COPYNUM(nb_inplace_subtract); |
| COPYNUM(nb_inplace_multiply); |
| COPYNUM(nb_inplace_divide); |
| COPYNUM(nb_inplace_remainder); |
| COPYNUM(nb_inplace_power); |
| COPYNUM(nb_inplace_lshift); |
| COPYNUM(nb_inplace_rshift); |
| COPYNUM(nb_inplace_and); |
| COPYNUM(nb_inplace_xor); |
| COPYNUM(nb_inplace_or); |
| if (base->tp_flags & Py_TPFLAGS_CHECKTYPES) { |
| COPYNUM(nb_true_divide); |
| COPYNUM(nb_floor_divide); |
| COPYNUM(nb_inplace_true_divide); |
| COPYNUM(nb_inplace_floor_divide); |
| } |
| } |
| |
| if (type->tp_as_sequence != NULL && base->tp_as_sequence != NULL) { |
| basebase = base->tp_base; |
| if (basebase->tp_as_sequence == NULL) |
| basebase = NULL; |
| COPYSEQ(sq_length); |
| COPYSEQ(sq_concat); |
| COPYSEQ(sq_repeat); |
| COPYSEQ(sq_item); |
| COPYSEQ(sq_slice); |
| COPYSEQ(sq_ass_item); |
| COPYSEQ(sq_ass_slice); |
| COPYSEQ(sq_contains); |
| COPYSEQ(sq_inplace_concat); |
| COPYSEQ(sq_inplace_repeat); |
| } |
| |
| if (type->tp_as_mapping != NULL && base->tp_as_mapping != NULL) { |
| basebase = base->tp_base; |
| if (basebase->tp_as_mapping == NULL) |
| basebase = NULL; |
| COPYMAP(mp_length); |
| COPYMAP(mp_subscript); |
| COPYMAP(mp_ass_subscript); |
| } |
| |
| basebase = base->tp_base; |
| |
| COPYSLOT(tp_dealloc); |
| COPYSLOT(tp_print); |
| if (type->tp_getattr == NULL && type->tp_getattro == NULL) { |
| type->tp_getattr = base->tp_getattr; |
| type->tp_getattro = base->tp_getattro; |
| } |
| if (type->tp_setattr == NULL && type->tp_setattro == NULL) { |
| type->tp_setattr = base->tp_setattr; |
| type->tp_setattro = base->tp_setattro; |
| } |
| /* tp_compare see tp_richcompare */ |
| COPYSLOT(tp_repr); |
| /* tp_hash see tp_richcompare */ |
| COPYSLOT(tp_call); |
| COPYSLOT(tp_str); |
| COPYSLOT(tp_as_buffer); |
| if (type->tp_flags & base->tp_flags & Py_TPFLAGS_HAVE_RICHCOMPARE) { |
| if (type->tp_compare == NULL && |
| type->tp_richcompare == NULL && |
| type->tp_hash == NULL) |
| { |
| type->tp_compare = base->tp_compare; |
| type->tp_richcompare = base->tp_richcompare; |
| type->tp_hash = base->tp_hash; |
| } |
| } |
| else { |
| COPYSLOT(tp_compare); |
| } |
| if (type->tp_flags & base->tp_flags & Py_TPFLAGS_HAVE_ITER) { |
| COPYSLOT(tp_iter); |
| COPYSLOT(tp_iternext); |
| } |
| if (type->tp_flags & base->tp_flags & Py_TPFLAGS_HAVE_CLASS) { |
| COPYSLOT(tp_descr_get); |
| COPYSLOT(tp_descr_set); |
| COPYSLOT(tp_dictoffset); |
| COPYSLOT(tp_init); |
| COPYSLOT(tp_alloc); |
| COPYSLOT(tp_free); |
| } |
| } |
| |
| staticforward int add_operators(PyTypeObject *); |
| |
| int |
| PyType_Ready(PyTypeObject *type) |
| { |
| PyObject *dict, *bases, *x; |
| PyTypeObject *base; |
| int i, n; |
| |
| if (type->tp_flags & Py_TPFLAGS_READY) { |
| assert(type->tp_dict != NULL); |
| return 0; |
| } |
| assert((type->tp_flags & Py_TPFLAGS_READYING) == 0); |
| assert(type->tp_dict == NULL); |
| |
| type->tp_flags |= Py_TPFLAGS_READYING; |
| |
| /* Initialize tp_base (defaults to BaseObject unless that's us) */ |
| base = type->tp_base; |
| if (base == NULL && type != &PyBaseObject_Type) |
| base = type->tp_base = &PyBaseObject_Type; |
| |
| /* Initialize tp_bases */ |
| bases = type->tp_bases; |
| if (bases == NULL) { |
| if (base == NULL) |
| bases = PyTuple_New(0); |
| else |
| bases = Py_BuildValue("(O)", base); |
| if (bases == NULL) |
| goto error; |
| type->tp_bases = bases; |
| } |
| |
| /* Initialize the base class */ |
| if (base && base->tp_dict == NULL) { |
| if (PyType_Ready(base) < 0) |
| goto error; |
| } |
| |
| /* Initialize tp_defined */ |
| dict = type->tp_defined; |
| if (dict == NULL) { |
| dict = PyDict_New(); |
| if (dict == NULL) |
| goto error; |
| type->tp_defined = dict; |
| } |
| |
| /* Add type-specific descriptors to tp_defined */ |
| if (add_operators(type) < 0) |
| goto error; |
| if (type->tp_methods != NULL) { |
| if (add_methods(type, type->tp_methods) < 0) |
| goto error; |
| } |
| if (type->tp_members != NULL) { |
| if (add_members(type, type->tp_members) < 0) |
| goto error; |
| } |
| if (type->tp_getset != NULL) { |
| if (add_getset(type, type->tp_getset) < 0) |
| goto error; |
| } |
| |
| /* Temporarily make tp_dict the same object as tp_defined. |
| (This is needed to call mro(), and can stay this way for |
| dynamic types). */ |
| Py_INCREF(type->tp_defined); |
| type->tp_dict = type->tp_defined; |
| |
| /* Calculate method resolution order */ |
| if (mro_internal(type) < 0) { |
| goto error; |
| } |
| |
| /* Inherit special flags from dominant base */ |
| if (type->tp_base != NULL) |
| inherit_special(type, type->tp_base); |
| |
| /* Initialize tp_dict properly */ |
| if (PyType_HasFeature(type, Py_TPFLAGS_DYNAMICTYPE)) { |
| /* For a dynamic type, all slots are overridden */ |
| override_slots(type, NULL); |
| } |
| else { |
| /* For a static type, tp_dict is the consolidation |
| of the tp_defined of its bases in MRO. */ |
| Py_DECREF(type->tp_dict); |
| type->tp_dict = PyDict_Copy(type->tp_defined); |
| if (type->tp_dict == NULL) |
| goto error; |
| bases = type->tp_mro; |
| assert(bases != NULL); |
| assert(PyTuple_Check(bases)); |
| n = PyTuple_GET_SIZE(bases); |
| for (i = 1; i < n; i++) { |
| base = (PyTypeObject *)PyTuple_GET_ITEM(bases, i); |
| assert(PyType_Check(base)); |
| x = base->tp_defined; |
| if (x != NULL && PyDict_Merge(type->tp_dict, x, 0) < 0) |
| goto error; |
| inherit_slots(type, base); |
| } |
| } |
| |
| /* Some more special stuff */ |
| base = type->tp_base; |
| if (base != NULL) { |
| if (type->tp_as_number == NULL) |
| type->tp_as_number = base->tp_as_number; |
| if (type->tp_as_sequence == NULL) |
| type->tp_as_sequence = base->tp_as_sequence; |
| if (type->tp_as_mapping == NULL) |
| type->tp_as_mapping = base->tp_as_mapping; |
| } |
| |
| /* All done -- set the ready flag */ |
| assert(type->tp_dict != NULL); |
| type->tp_flags = |
| (type->tp_flags & ~Py_TPFLAGS_READYING) | Py_TPFLAGS_READY; |
| return 0; |
| |
| error: |
| type->tp_flags &= ~Py_TPFLAGS_READYING; |
| return -1; |
| } |
| |
| |
| /* Generic wrappers for overloadable 'operators' such as __getitem__ */ |
| |
| /* There's a wrapper *function* for each distinct function typedef used |
| for type object slots (e.g. binaryfunc, ternaryfunc, etc.). There's a |
| wrapper *table* for each distinct operation (e.g. __len__, __add__). |
| Most tables have only one entry; the tables for binary operators have two |
| entries, one regular and one with reversed arguments. */ |
| |
| static PyObject * |
| wrap_inquiry(PyObject *self, PyObject *args, void *wrapped) |
| { |
| inquiry func = (inquiry)wrapped; |
| int res; |
| |
| if (!PyArg_ParseTuple(args, "")) |
| return NULL; |
| res = (*func)(self); |
| if (res == -1 && PyErr_Occurred()) |
| return NULL; |
| return PyInt_FromLong((long)res); |
| } |
| |
| static struct wrapperbase tab_len[] = { |
| {"__len__", (wrapperfunc)wrap_inquiry, "x.__len__() <==> len(x)"}, |
| {0} |
| }; |
| |
| static PyObject * |
| wrap_binaryfunc(PyObject *self, PyObject *args, void *wrapped) |
| { |
| binaryfunc func = (binaryfunc)wrapped; |
| PyObject *other; |
| |
| if (!PyArg_ParseTuple(args, "O", &other)) |
| return NULL; |
| return (*func)(self, other); |
| } |
| |
| static PyObject * |
| wrap_binaryfunc_r(PyObject *self, PyObject *args, void *wrapped) |
| { |
| binaryfunc func = (binaryfunc)wrapped; |
| PyObject *other; |
| |
| if (!PyArg_ParseTuple(args, "O", &other)) |
| return NULL; |
| return (*func)(other, self); |
| } |
| |
| #undef BINARY |
| #define BINARY(NAME, OP) \ |
| static struct wrapperbase tab_##NAME[] = { \ |
| {"__" #NAME "__", \ |
| (wrapperfunc)wrap_binaryfunc, \ |
| "x.__" #NAME "__(y) <==> " #OP}, \ |
| {"__r" #NAME "__", \ |
| (wrapperfunc)wrap_binaryfunc_r, \ |
| "y.__r" #NAME "__(x) <==> " #OP}, \ |
| {0} \ |
| } |
| |
| BINARY(add, "x+y"); |
| BINARY(sub, "x-y"); |
| BINARY(mul, "x*y"); |
| BINARY(div, "x/y"); |
| BINARY(mod, "x%y"); |
| BINARY(divmod, "divmod(x,y)"); |
| BINARY(lshift, "x<<y"); |
| BINARY(rshift, "x>>y"); |
| BINARY(and, "x&y"); |
| BINARY(xor, "x^y"); |
| BINARY(or, "x|y"); |
| |
| static PyObject * |
| wrap_ternaryfunc(PyObject *self, PyObject *args, void *wrapped) |
| { |
| ternaryfunc func = (ternaryfunc)wrapped; |
| PyObject *other; |
| PyObject *third = Py_None; |
| |
| /* Note: This wrapper only works for __pow__() */ |
| |
| if (!PyArg_ParseTuple(args, "O|O", &other, &third)) |
| return NULL; |
| return (*func)(self, other, third); |
| } |
| |
| #undef TERNARY |
| #define TERNARY(NAME, OP) \ |
| static struct wrapperbase tab_##NAME[] = { \ |
| {"__" #NAME "__", \ |
| (wrapperfunc)wrap_ternaryfunc, \ |
| "x.__" #NAME "__(y, z) <==> " #OP}, \ |
| {"__r" #NAME "__", \ |
| (wrapperfunc)wrap_ternaryfunc, \ |
| "y.__r" #NAME "__(x, z) <==> " #OP}, \ |
| {0} \ |
| } |
| |
| TERNARY(pow, "(x**y) % z"); |
| |
| #undef UNARY |
| #define UNARY(NAME, OP) \ |
| static struct wrapperbase tab_##NAME[] = { \ |
| {"__" #NAME "__", \ |
| (wrapperfunc)wrap_unaryfunc, \ |
| "x.__" #NAME "__() <==> " #OP}, \ |
| {0} \ |
| } |
| |
| static PyObject * |
| wrap_unaryfunc(PyObject *self, PyObject *args, void *wrapped) |
| { |
| unaryfunc func = (unaryfunc)wrapped; |
| |
| if (!PyArg_ParseTuple(args, "")) |
| return NULL; |
| return (*func)(self); |
| } |
| |
| UNARY(neg, "-x"); |
| UNARY(pos, "+x"); |
| UNARY(abs, "abs(x)"); |
| UNARY(nonzero, "x != 0"); |
| UNARY(invert, "~x"); |
| UNARY(int, "int(x)"); |
| UNARY(long, "long(x)"); |
| UNARY(float, "float(x)"); |
| UNARY(oct, "oct(x)"); |
| UNARY(hex, "hex(x)"); |
| |
| #undef IBINARY |
| #define IBINARY(NAME, OP) \ |
| static struct wrapperbase tab_##NAME[] = { \ |
| {"__" #NAME "__", \ |
| (wrapperfunc)wrap_binaryfunc, \ |
| "x.__" #NAME "__(y) <==> " #OP}, \ |
| {0} \ |
| } |
| |
| IBINARY(iadd, "x+=y"); |
| IBINARY(isub, "x-=y"); |
| IBINARY(imul, "x*=y"); |
| IBINARY(idiv, "x/=y"); |
| IBINARY(imod, "x%=y"); |
| IBINARY(ilshift, "x<<=y"); |
| IBINARY(irshift, "x>>=y"); |
| IBINARY(iand, "x&=y"); |
| IBINARY(ixor, "x^=y"); |
| IBINARY(ior, "x|=y"); |
| |
| #undef ITERNARY |
| #define ITERNARY(NAME, OP) \ |
| static struct wrapperbase tab_##NAME[] = { \ |
| {"__" #NAME "__", \ |
| (wrapperfunc)wrap_ternaryfunc, \ |
| "x.__" #NAME "__(y) <==> " #OP}, \ |
| {0} \ |
| } |
| |
| ITERNARY(ipow, "x = (x**y) % z"); |
| |
| static struct wrapperbase tab_getitem[] = { |
| {"__getitem__", (wrapperfunc)wrap_binaryfunc, |
| "x.__getitem__(y) <==> x[y]"}, |
| {0} |
| }; |
| |
| static PyObject * |
| wrap_intargfunc(PyObject *self, PyObject *args, void *wrapped) |
| { |
| intargfunc func = (intargfunc)wrapped; |
| int i; |
| |
| if (!PyArg_ParseTuple(args, "i", &i)) |
| return NULL; |
| return (*func)(self, i); |
| } |
| |
| static struct wrapperbase tab_mul_int[] = { |
| {"__mul__", (wrapperfunc)wrap_intargfunc, "x.__mul__(n) <==> x*n"}, |
| {"__rmul__", (wrapperfunc)wrap_intargfunc, "x.__rmul__(n) <==> n*x"}, |
| {0} |
| }; |
| |
| static struct wrapperbase tab_concat[] = { |
| {"__add__", (wrapperfunc)wrap_binaryfunc, "x.__add__(y) <==> x+y"}, |
| {0} |
| }; |
| |
| static struct wrapperbase tab_imul_int[] = { |
| {"__imul__", (wrapperfunc)wrap_intargfunc, "x.__imul__(n) <==> x*=n"}, |
| {0} |
| }; |
| |
| static int |
| getindex(PyObject *self, PyObject *arg) |
| { |
| int i; |
| |
| i = PyInt_AsLong(arg); |
| if (i == -1 && PyErr_Occurred()) |
| return -1; |
| if (i < 0) { |
| PySequenceMethods *sq = self->ob_type->tp_as_sequence; |
| if (sq && sq->sq_length) { |
| int n = (*sq->sq_length)(self); |
| if (n < 0) |
| return -1; |
| i += n; |
| } |
| } |
| return i; |
| } |
| |
| static PyObject * |
| wrap_sq_item(PyObject *self, PyObject *args, void *wrapped) |
| { |
| intargfunc func = (intargfunc)wrapped; |
| PyObject *arg; |
| int i; |
| |
| if (!PyArg_ParseTuple(args, "O", &arg)) |
| return NULL; |
| i = getindex(self, arg); |
| if (i == -1 && PyErr_Occurred()) |
| return NULL; |
| return (*func)(self, i); |
| } |
| |
| static struct wrapperbase tab_getitem_int[] = { |
| {"__getitem__", (wrapperfunc)wrap_sq_item, |
| "x.__getitem__(i) <==> x[i]"}, |
| {0} |
| }; |
| |
| static PyObject * |
| wrap_intintargfunc(PyObject *self, PyObject *args, void *wrapped) |
| { |
| intintargfunc func = (intintargfunc)wrapped; |
| int i, j; |
| |
| if (!PyArg_ParseTuple(args, "ii", &i, &j)) |
| return NULL; |
| return (*func)(self, i, j); |
| } |
| |
| static struct wrapperbase tab_getslice[] = { |
| {"__getslice__", (wrapperfunc)wrap_intintargfunc, |
| "x.__getslice__(i, j) <==> x[i:j]"}, |
| {0} |
| }; |
| |
| static PyObject * |
| wrap_sq_setitem(PyObject *self, PyObject *args, void *wrapped) |
| { |
| intobjargproc func = (intobjargproc)wrapped; |
| int i, res; |
| PyObject *arg, *value; |
| |
| if (!PyArg_ParseTuple(args, "OO", &arg, &value)) |
| return NULL; |
| i = getindex(self, arg); |
| if (i == -1 && PyErr_Occurred()) |
| return NULL; |
| res = (*func)(self, i, value); |
| if (res == -1 && PyErr_Occurred()) |
| return NULL; |
| Py_INCREF(Py_None); |
| return Py_None; |
| } |
| |
| static PyObject * |
| wrap_sq_delitem(PyObject *self, PyObject *args, void *wrapped) |
| { |
| intobjargproc func = (intobjargproc)wrapped; |
| int i, res; |
| PyObject *arg; |
| |
| if (!PyArg_ParseTuple(args, "O", &arg)) |
| return NULL; |
| i = getindex(self, arg); |
| if (i == -1 && PyErr_Occurred()) |
| return NULL; |
| res = (*func)(self, i, NULL); |
| if (res == -1 && PyErr_Occurred()) |
| return NULL; |
| Py_INCREF(Py_None); |
| return Py_None; |
| } |
| |
| static struct wrapperbase tab_setitem_int[] = { |
| {"__setitem__", (wrapperfunc)wrap_sq_setitem, |
| "x.__setitem__(i, y) <==> x[i]=y"}, |
| {"__delitem__", (wrapperfunc)wrap_sq_delitem, |
| "x.__delitem__(y) <==> del x[y]"}, |
| {0} |
| }; |
| |
| static PyObject * |
| wrap_intintobjargproc(PyObject *self, PyObject *args, void *wrapped) |
| { |
| intintobjargproc func = (intintobjargproc)wrapped; |
| int i, j, res; |
| PyObject *value; |
| |
| if (!PyArg_ParseTuple(args, "iiO", &i, &j, &value)) |
| return NULL; |
| res = (*func)(self, i, j, value); |
| if (res == -1 && PyErr_Occurred()) |
| return NULL; |
| Py_INCREF(Py_None); |
| return Py_None; |
| } |
| |
| static struct wrapperbase tab_setslice[] = { |
| {"__setslice__", (wrapperfunc)wrap_intintobjargproc, |
| "x.__setslice__(i, j, y) <==> x[i:j]=y"}, |
| {0} |
| }; |
| |
| /* XXX objobjproc is a misnomer; should be objargpred */ |
| static PyObject * |
| wrap_objobjproc(PyObject *self, PyObject *args, void *wrapped) |
| { |
| objobjproc func = (objobjproc)wrapped; |
| int res; |
| PyObject *value; |
| |
| if (!PyArg_ParseTuple(args, "O", &value)) |
| return NULL; |
| res = (*func)(self, value); |
| if (res == -1 && PyErr_Occurred()) |
| return NULL; |
| return PyInt_FromLong((long)res); |
| } |
| |
| static struct wrapperbase tab_contains[] = { |
| {"__contains__", (wrapperfunc)wrap_objobjproc, |
| "x.__contains__(y) <==> y in x"}, |
| {0} |
| }; |
| |
| static PyObject * |
| wrap_objobjargproc(PyObject *self, PyObject *args, void *wrapped) |
| { |
| objobjargproc func = (objobjargproc)wrapped; |
| int res; |
| PyObject *key, *value; |
| |
| if (!PyArg_ParseTuple(args, "OO", &key, &value)) |
| return NULL; |
| res = (*func)(self, key, value); |
| if (res == -1 && PyErr_Occurred()) |
| return NULL; |
| Py_INCREF(Py_None); |
| return Py_None; |
| } |
| |
| static PyObject * |
| wrap_delitem(PyObject *self, PyObject *args, void *wrapped) |
| { |
| objobjargproc func = (objobjargproc)wrapped; |
| int res; |
| PyObject *key; |
| |
| if (!PyArg_ParseTuple(args, "O", &key)) |
| return NULL; |
| res = (*func)(self, key, NULL); |
| if (res == -1 && PyErr_Occurred()) |
| return NULL; |
| Py_INCREF(Py_None); |
| return Py_None; |
| } |
| |
| static struct wrapperbase tab_setitem[] = { |
| {"__setitem__", (wrapperfunc)wrap_objobjargproc, |
| "x.__setitem__(y, z) <==> x[y]=z"}, |
| {"__delitem__", (wrapperfunc)wrap_delitem, |
| "x.__delitem__(y) <==> del x[y]"}, |
| {0} |
| }; |
| |
| static PyObject * |
| wrap_cmpfunc(PyObject *self, PyObject *args, void *wrapped) |
| { |
| cmpfunc func = (cmpfunc)wrapped; |
| int res; |
| PyObject *other; |
| |
| if (!PyArg_ParseTuple(args, "O", &other)) |
| return NULL; |
| res = (*func)(self, other); |
| if (PyErr_Occurred()) |
| return NULL; |
| return PyInt_FromLong((long)res); |
| } |
| |
| static struct wrapperbase tab_cmp[] = { |
| {"__cmp__", (wrapperfunc)wrap_cmpfunc, |
| "x.__cmp__(y) <==> cmp(x,y)"}, |
| {0} |
| }; |
| |
| static struct wrapperbase tab_repr[] = { |
| {"__repr__", (wrapperfunc)wrap_unaryfunc, |
| "x.__repr__() <==> repr(x)"}, |
| {0} |
| }; |
| |
| static struct wrapperbase tab_getattr[] = { |
| {"__getattr__", (wrapperfunc)wrap_binaryfunc, |
| "x.__getattr__('name') <==> x.name"}, |
| {0} |
| }; |
| |
| static PyObject * |
| wrap_setattr(PyObject *self, PyObject *args, void *wrapped) |
| { |
| setattrofunc func = (setattrofunc)wrapped; |
| int res; |
| PyObject *name, *value; |
| |
| if (!PyArg_ParseTuple(args, "OO", &name, &value)) |
| return NULL; |
| res = (*func)(self, name, value); |
| if (res < 0) |
| return NULL; |
| Py_INCREF(Py_None); |
| return Py_None; |
| } |
| |
| static PyObject * |
| wrap_delattr(PyObject *self, PyObject *args, void *wrapped) |
| { |
| setattrofunc func = (setattrofunc)wrapped; |
| int res; |
| PyObject *name; |
| |
| if (!PyArg_ParseTuple(args, "O", &name)) |
| return NULL; |
| res = (*func)(self, name, NULL); |
| if (res < 0) |
| return NULL; |
| Py_INCREF(Py_None); |
| return Py_None; |
| } |
| |
| static struct wrapperbase tab_setattr[] = { |
| {"__setattr__", (wrapperfunc)wrap_setattr, |
| "x.__setattr__('name', value) <==> x.name = value"}, |
| {"__delattr__", (wrapperfunc)wrap_delattr, |
| "x.__delattr__('name') <==> del x.name"}, |
| {0} |
| }; |
| |
| static PyObject * |
| wrap_hashfunc(PyObject *self, PyObject *args, void *wrapped) |
| { |
| hashfunc func = (hashfunc)wrapped; |
| long res; |
| |
| if (!PyArg_ParseTuple(args, "")) |
| return NULL; |
| res = (*func)(self); |
| if (res == -1 && PyErr_Occurred()) |
| return NULL; |
| return PyInt_FromLong(res); |
| } |
| |
| static struct wrapperbase tab_hash[] = { |
| {"__hash__", (wrapperfunc)wrap_hashfunc, |
| "x.__hash__() <==> hash(x)"}, |
| {0} |
| }; |
| |
| static PyObject * |
| wrap_call(PyObject *self, PyObject *args, void *wrapped) |
| { |
| ternaryfunc func = (ternaryfunc)wrapped; |
| |
| /* XXX What about keyword arguments? */ |
| return (*func)(self, args, NULL); |
| } |
| |
| static struct wrapperbase tab_call[] = { |
| {"__call__", (wrapperfunc)wrap_call, |
| "x.__call__(...) <==> x(...)"}, |
| {0} |
| }; |
| |
| static struct wrapperbase tab_str[] = { |
| {"__str__", (wrapperfunc)wrap_unaryfunc, |
| "x.__str__() <==> str(x)"}, |
| {0} |
| }; |
| |
| static PyObject * |
| wrap_richcmpfunc(PyObject *self, PyObject *args, void *wrapped, int op) |
| { |
| richcmpfunc func = (richcmpfunc)wrapped; |
| PyObject *other; |
| |
| if (!PyArg_ParseTuple(args, "O", &other)) |
| return NULL; |
| return (*func)(self, other, op); |
| } |
| |
| #undef RICHCMP_WRAPPER |
| #define RICHCMP_WRAPPER(NAME, OP) \ |
| static PyObject * \ |
| richcmp_##NAME(PyObject *self, PyObject *args, void *wrapped) \ |
| { \ |
| return wrap_richcmpfunc(self, args, wrapped, OP); \ |
| } |
| |
| RICHCMP_WRAPPER(lt, Py_LT) |
| RICHCMP_WRAPPER(le, Py_LE) |
| RICHCMP_WRAPPER(eq, Py_EQ) |
| RICHCMP_WRAPPER(ne, Py_NE) |
| RICHCMP_WRAPPER(gt, Py_GT) |
| RICHCMP_WRAPPER(ge, Py_GE) |
| |
| #undef RICHCMP_ENTRY |
| #define RICHCMP_ENTRY(NAME, EXPR) \ |
| {"__" #NAME "__", (wrapperfunc)richcmp_##NAME, \ |
| "x.__" #NAME "__(y) <==> " EXPR} |
| |
| static struct wrapperbase tab_richcmp[] = { |
| RICHCMP_ENTRY(lt, "x<y"), |
| RICHCMP_ENTRY(le, "x<=y"), |
| RICHCMP_ENTRY(eq, "x==y"), |
| RICHCMP_ENTRY(ne, "x!=y"), |
| RICHCMP_ENTRY(gt, "x>y"), |
| RICHCMP_ENTRY(ge, "x>=y"), |
| {0} |
| }; |
| |
| static struct wrapperbase tab_iter[] = { |
| {"__iter__", (wrapperfunc)wrap_unaryfunc, "x.__iter__() <==> iter(x)"}, |
| {0} |
| }; |
| |
| static PyObject * |
| wrap_next(PyObject *self, PyObject *args, void *wrapped) |
| { |
| unaryfunc func = (unaryfunc)wrapped; |
| PyObject *res; |
| |
| if (!PyArg_ParseTuple(args, "")) |
| return NULL; |
| res = (*func)(self); |
| if (res == NULL && !PyErr_Occurred()) |
| PyErr_SetNone(PyExc_StopIteration); |
| return res; |
| } |
| |
| static struct wrapperbase tab_next[] = { |
| {"next", (wrapperfunc)wrap_next, |
| "x.next() -> the next value, or raise StopIteration"}, |
| {0} |
| }; |
| |
| static PyObject * |
| wrap_descr_get(PyObject *self, PyObject *args, void *wrapped) |
| { |
| descrgetfunc func = (descrgetfunc)wrapped; |
| PyObject *obj; |
| PyObject *type = NULL; |
| |
| if (!PyArg_ParseTuple(args, "O|O", &obj, &type)) |
| return NULL; |
| return (*func)(self, obj, type); |
| } |
| |
| static struct wrapperbase tab_descr_get[] = { |
| {"__get__", (wrapperfunc)wrap_descr_get, |
| "descr.__get__(obj, type) -> value"}, |
| {0} |
| }; |
| |
| static PyObject * |
| wrap_descrsetfunc(PyObject *self, PyObject *args, void *wrapped) |
| { |
| descrsetfunc func = (descrsetfunc)wrapped; |
| PyObject *obj, *value; |
| int ret; |
| |
| if (!PyArg_ParseTuple(args, "OO", &obj, &value)) |
| return NULL; |
| ret = (*func)(self, obj, value); |
| if (ret < 0) |
| return NULL; |
| Py_INCREF(Py_None); |
| return Py_None; |
| } |
| |
| static struct wrapperbase tab_descr_set[] = { |
| {"__set__", (wrapperfunc)wrap_descrsetfunc, |
| "descr.__set__(obj, value)"}, |
| {0} |
| }; |
| |
| static PyObject * |
| wrap_init(PyObject *self, PyObject *args, void *wrapped) |
| { |
| initproc func = (initproc)wrapped; |
| |
| /* XXX What about keyword arguments? */ |
| if (func(self, args, NULL) < 0) |
| return NULL; |
| Py_INCREF(Py_None); |
| return Py_None; |
| } |
| |
| static struct wrapperbase tab_init[] = { |
| {"__init__", (wrapperfunc)wrap_init, |
| "x.__init__(...) initializes x; " |
| "see x.__type__.__doc__ for signature"}, |
| {0} |
| }; |
| |
| static PyObject * |
| tp_new_wrapper(PyObject *self, PyObject *args, PyObject *kwds) |
| { |
| PyTypeObject *type, *subtype, *staticbase; |
| PyObject *arg0, *res; |
| |
| if (self == NULL || !PyType_Check(self)) |
| Py_FatalError("__new__() called with non-type 'self'"); |
| type = (PyTypeObject *)self; |
| if (!PyTuple_Check(args) || PyTuple_GET_SIZE(args) < 1) { |
| PyErr_Format(PyExc_TypeError, |
| "%s.__new__(): not enough arguments", |
| type->tp_name); |
| return NULL; |
| } |
| arg0 = PyTuple_GET_ITEM(args, 0); |
| if (!PyType_Check(arg0)) { |
| PyErr_Format(PyExc_TypeError, |
| "%s.__new__(X): X is not a type object (%s)", |
| type->tp_name, |
| arg0->ob_type->tp_name); |
| return NULL; |
| } |
| subtype = (PyTypeObject *)arg0; |
| if (!PyType_IsSubtype(subtype, type)) { |
| PyErr_Format(PyExc_TypeError, |
| "%s.__new__(%s): %s is not a subtype of %s", |
| type->tp_name, |
| subtype->tp_name, |
| subtype->tp_name, |
| type->tp_name); |
| return NULL; |
| } |
| |
| /* Check that the use doesn't do something silly and unsafe like |
| object.__new__(dictionary). To do this, we check that the |
| most derived base that's not a heap type is this type. */ |
| staticbase = subtype; |
| while (staticbase && (staticbase->tp_flags & Py_TPFLAGS_HEAPTYPE)) |
| staticbase = staticbase->tp_base; |
| if (staticbase != type) { |
| PyErr_Format(PyExc_TypeError, |
| "%s.__new__(%s) is not safe, use %s.__new__()", |
| type->tp_name, |
| subtype->tp_name, |
| staticbase == NULL ? "?" : staticbase->tp_name); |
| return NULL; |
| } |
| |
| args = PyTuple_GetSlice(args, 1, PyTuple_GET_SIZE(args)); |
| if (args == NULL) |
| return NULL; |
| res = type->tp_new(subtype, args, kwds); |
| Py_DECREF(args); |
| return res; |
| } |
| |
| static struct PyMethodDef tp_new_methoddef[] = { |
| {"__new__", (PyCFunction)tp_new_wrapper, METH_KEYWORDS, |
| "T.__new__(S, ...) -> a new object with type S, a subtype of T"}, |
| {0} |
| }; |
| |
| static int |
| add_tp_new_wrapper(PyTypeObject *type) |
| { |
| PyObject *func; |
| |
| if (PyDict_GetItemString(type->tp_defined, "__new__") != NULL) |
| return 0; |
| func = PyCFunction_New(tp_new_methoddef, (PyObject *)type); |
| if (func == NULL) |
| return -1; |
| return PyDict_SetItemString(type->tp_defined, "__new__", func); |
| } |
| |
| static int |
| add_wrappers(PyTypeObject *type, struct wrapperbase *wraps, void *wrapped) |
| { |
| PyObject *dict = type->tp_defined; |
| |
| for (; wraps->name != NULL; wraps++) { |
| PyObject *descr; |
| if (PyDict_GetItemString(dict, wraps->name)) |
| continue; |
| descr = PyDescr_NewWrapper(type, wraps, wrapped); |
| if (descr == NULL) |
| return -1; |
| if (PyDict_SetItemString(dict, wraps->name, descr) < 0) |
| return -1; |
| Py_DECREF(descr); |
| } |
| return 0; |
| } |
| |
| /* This function is called by PyType_Ready() to populate the type's |
| dictionary with method descriptors for function slots. For each |
| function slot (like tp_repr) that's defined in the type, one or |
| more corresponding descriptors are added in the type's tp_defined |
| dictionary under the appropriate name (like __repr__). Some |
| function slots cause more than one descriptor to be added (for |
| example, the nb_add slot adds both __add__ and __radd__ |
| descriptors) and some function slots compete for the same |
| descriptor (for example both sq_item and mp_subscript generate a |
| __getitem__ descriptor). This only adds new descriptors and |
| doesn't overwrite entries in tp_defined that were previously |
| defined. The descriptors contain a reference to the C function |
| they must call, so that it's safe if they are copied into a |
| subtype's __dict__ and the subtype has a different C function in |
| its slot -- calling the method defined by the descriptor will call |
| the C function that was used to create it, rather than the C |
| function present in the slot when it is called. (This is important |
| because a subtype may have a C function in the slot that calls the |
| method from the dictionary, and we want to avoid infinite recursion |
| here.) */ |
| |
| static int |
| add_operators(PyTypeObject *type) |
| { |
| PySequenceMethods *sq; |
| PyMappingMethods *mp; |
| PyNumberMethods *nb; |
| |
| #undef ADD |
| #define ADD(SLOT, TABLE) \ |
| if (SLOT) { \ |
| if (add_wrappers(type, TABLE, (void *)(SLOT)) < 0) \ |
| return -1; \ |
| } |
| |
| if ((sq = type->tp_as_sequence) != NULL) { |
| ADD(sq->sq_length, tab_len); |
| ADD(sq->sq_concat, tab_concat); |
| ADD(sq->sq_repeat, tab_mul_int); |
| ADD(sq->sq_item, tab_getitem_int); |
| ADD(sq->sq_slice, tab_getslice); |
| ADD(sq->sq_ass_item, tab_setitem_int); |
| ADD(sq->sq_ass_slice, tab_setslice); |
| ADD(sq->sq_contains, tab_contains); |
| ADD(sq->sq_inplace_concat, tab_iadd); |
| ADD(sq->sq_inplace_repeat, tab_imul_int); |
| } |
| |
| if ((mp = type->tp_as_mapping) != NULL) { |
| if (sq->sq_length == NULL) |
| ADD(mp->mp_length, tab_len); |
| ADD(mp->mp_subscript, tab_getitem); |
| ADD(mp->mp_ass_subscript, tab_setitem); |
| } |
| |
| /* We don't support "old-style numbers" because their binary |
| operators require that both arguments have the same type; |
| the wrappers here only work for new-style numbers. */ |
| if ((type->tp_flags & Py_TPFLAGS_CHECKTYPES) && |
| (nb = type->tp_as_number) != NULL) { |
| ADD(nb->nb_add, tab_add); |
| ADD(nb->nb_subtract, tab_sub); |
| ADD(nb->nb_multiply, tab_mul); |
| ADD(nb->nb_divide, tab_div); |
| ADD(nb->nb_remainder, tab_mod); |
| ADD(nb->nb_divmod, tab_divmod); |
| ADD(nb->nb_power, tab_pow); |
| ADD(nb->nb_negative, tab_neg); |
| ADD(nb->nb_positive, tab_pos); |
| ADD(nb->nb_absolute, tab_abs); |
| ADD(nb->nb_nonzero, tab_nonzero); |
| ADD(nb->nb_invert, tab_invert); |
| ADD(nb->nb_lshift, tab_lshift); |
| ADD(nb->nb_rshift, tab_rshift); |
| ADD(nb->nb_and, tab_and); |
| ADD(nb->nb_xor, tab_xor); |
| ADD(nb->nb_or, tab_or); |
| /* We don't support coerce() -- see above comment */ |
| ADD(nb->nb_int, tab_int); |
| ADD(nb->nb_long, tab_long); |
| ADD(nb->nb_float, tab_float); |
| ADD(nb->nb_oct, tab_oct); |
| ADD(nb->nb_hex, tab_hex); |
| ADD(nb->nb_inplace_add, tab_iadd); |
| ADD(nb->nb_inplace_subtract, tab_isub); |
| ADD(nb->nb_inplace_multiply, tab_imul); |
| ADD(nb->nb_inplace_divide, tab_idiv); |
| ADD(nb->nb_inplace_remainder, tab_imod); |
| ADD(nb->nb_inplace_power, tab_ipow); |
| ADD(nb->nb_inplace_lshift, tab_ilshift); |
| ADD(nb->nb_inplace_rshift, tab_irshift); |
| ADD(nb->nb_inplace_and, tab_iand); |
| ADD(nb->nb_inplace_xor, tab_ixor); |
| ADD(nb->nb_inplace_or, tab_ior); |
| } |
| |
| ADD(type->tp_getattro, tab_getattr); |
| ADD(type->tp_setattro, tab_setattr); |
| ADD(type->tp_compare, tab_cmp); |
| ADD(type->tp_repr, tab_repr); |
| ADD(type->tp_hash, tab_hash); |
| ADD(type->tp_call, tab_call); |
| ADD(type->tp_str, tab_str); |
| ADD(type->tp_richcompare, tab_richcmp); |
| ADD(type->tp_iter, tab_iter); |
| ADD(type->tp_iternext, tab_next); |
| ADD(type->tp_descr_get, tab_descr_get); |
| ADD(type->tp_descr_set, tab_descr_set); |
| ADD(type->tp_init, tab_init); |
| |
| if (type->tp_new != NULL) { |
| if (add_tp_new_wrapper(type) < 0) |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| /* Slot wrappers that call the corresponding __foo__ slot. See comments |
| below at override_slots() for more explanation. */ |
| |
| #define SLOT0(FUNCNAME, OPSTR) \ |
| static PyObject * \ |
| FUNCNAME(PyObject *self) \ |
| { \ |
| static PyObject *cache_str; \ |
| return call_method(self, OPSTR, &cache_str, ""); \ |
| } |
| |
| #define SLOT1(FUNCNAME, OPSTR, ARG1TYPE, ARGCODES) \ |
| static PyObject * \ |
| FUNCNAME(PyObject *self, ARG1TYPE arg1) \ |
| { \ |
| static PyObject *cache_str; \ |
| return call_method(self, OPSTR, &cache_str, ARGCODES, arg1); \ |
| } |
| |
| |
| #define SLOT1BINFULL(FUNCNAME, TESTFUNC, SLOTNAME, OPSTR, ROPSTR) \ |
| static PyObject * \ |
| FUNCNAME(PyObject *self, PyObject *other) \ |
| { \ |
| static PyObject *cache_str, *rcache_str; \ |
| if (self->ob_type->tp_as_number != NULL && \ |
| self->ob_type->tp_as_number->SLOTNAME == TESTFUNC) { \ |
| PyObject *r; \ |
| r = call_method( \ |
| self, OPSTR, &cache_str, "O", other); \ |
| if (r != Py_NotImplemented || \ |
| other->ob_type == self->ob_type) \ |
| return r; \ |
| Py_DECREF(r); \ |
| } \ |
| if (other->ob_type->tp_as_number != NULL && \ |
| other->ob_type->tp_as_number->SLOTNAME == TESTFUNC) { \ |
| return call_method( \ |
| other, ROPSTR, &rcache_str, "O", self); \ |
| } \ |
| Py_INCREF(Py_NotImplemented); \ |
| return Py_NotImplemented; \ |
| } |
| |
| #define SLOT1BIN(FUNCNAME, SLOTNAME, OPSTR, ROPSTR) \ |
| SLOT1BINFULL(FUNCNAME, FUNCNAME, SLOTNAME, OPSTR, ROPSTR) |
| |
| #define SLOT2(FUNCNAME, OPSTR, ARG1TYPE, ARG2TYPE, ARGCODES) \ |
| static PyObject * \ |
| FUNCNAME(PyObject *self, ARG1TYPE arg1, ARG2TYPE arg2) \ |
| { \ |
| static PyObject *cache_str; \ |
| return call_method(self, OPSTR, &cache_str, ARGCODES, arg1, arg2); \ |
| } |
| |
| static int |
| slot_sq_length(PyObject *self) |
| { |
| static PyObject *len_str; |
| PyObject *res = call_method(self, "__len__", &len_str, ""); |
| |
| if (res == NULL) |
| return -1; |
| return (int)PyInt_AsLong(res); |
| } |
| |
| SLOT1(slot_sq_concat, "__add__", PyObject *, "O") |
| SLOT1(slot_sq_repeat, "__mul__", int, "i") |
| SLOT1(slot_sq_item, "__getitem__", int, "i") |
| SLOT2(slot_sq_slice, "__getslice__", int, int, "ii") |
| |
| static int |
| slot_sq_ass_item(PyObject *self, int index, PyObject *value) |
| { |
| PyObject *res; |
| static PyObject *delitem_str, *setitem_str; |
| |
| if (value == NULL) |
| res = call_method(self, "__delitem__", &delitem_str, |
| "i", index); |
| else |
| res = call_method(self, "__setitem__", &setitem_str, |
| "iO", index, value); |
| if (res == NULL) |
| return -1; |
| Py_DECREF(res); |
| return 0; |
| } |
| |
| static int |
| slot_sq_ass_slice(PyObject *self, int i, int j, PyObject *value) |
| { |
| PyObject *res; |
| static PyObject *delslice_str, *setslice_str; |
| |
| if (value == NULL) |
| res = call_method(self, "__delslice__", &delslice_str, |
| "ii", i, j); |
| else |
| res = call_method(self, "__setslice__", &setslice_str, |
| "iiO", i, j, value); |
| if (res == NULL) |
| return -1; |
| Py_DECREF(res); |
| return 0; |
| } |
| |
| static int |
| slot_sq_contains(PyObject *self, PyObject *value) |
| { |
| PyObject *func, *res, *args; |
| static PyObject *contains_str; |
| |
| func = lookup_method(self, "__contains__", &contains_str); |
| |
| if (func != NULL) { |
| args = Py_BuildValue("(O)", value); |
| if (args == NULL) |
| res = NULL; |
| else { |
| res = PyEval_CallObject(func, args); |
| Py_DECREF(args); |
| } |
| Py_DECREF(func); |
| if (res == NULL) |
| return -1; |
| return PyObject_IsTrue(res); |
| } |
| else { |
| PyErr_Clear(); |
| return _PySequence_IterSearch(self, value, |
| PY_ITERSEARCH_CONTAINS); |
| } |
| } |
| |
| SLOT1(slot_sq_inplace_concat, "__iadd__", PyObject *, "O") |
| SLOT1(slot_sq_inplace_repeat, "__imul__", int, "i") |
| |
| #define slot_mp_length slot_sq_length |
| |
| SLOT1(slot_mp_subscript, "__getitem__", PyObject *, "O") |
| |
| static int |
| slot_mp_ass_subscript(PyObject *self, PyObject *key, PyObject *value) |
| { |
| PyObject *res; |
| static PyObject *delitem_str, *setitem_str; |
| |
| if (value == NULL) |
| res = call_method(self, "__delitem__", &delitem_str, |
| "O", key); |
| else |
| res = call_method(self, "__setitem__", &setitem_str, |
| "OO", key, value); |
| if (res == NULL) |
| return -1; |
| Py_DECREF(res); |
| return 0; |
| } |
| |
| SLOT1BIN(slot_nb_add, nb_add, "__add__", "__radd__") |
| SLOT1BIN(slot_nb_subtract, nb_subtract, "__sub__", "__rsub__") |
| SLOT1BIN(slot_nb_multiply, nb_multiply, "__mul__", "__rmul__") |
| SLOT1BIN(slot_nb_divide, nb_divide, "__div__", "__rdiv__") |
| SLOT1BIN(slot_nb_remainder, nb_remainder, "__mod__", "__rmod__") |
| SLOT1BIN(slot_nb_divmod, nb_divmod, "__divmod__", "__rdivmod__") |
| |
| staticforward PyObject *slot_nb_power(PyObject *, PyObject *, PyObject *); |
| |
| SLOT1BINFULL(slot_nb_power_binary, slot_nb_power, |
| nb_power, "__pow__", "__rpow__") |
| |
| static PyObject * |
| slot_nb_power(PyObject *self, PyObject *other, PyObject *modulus) |
| { |
| static PyObject *pow_str; |
| |
| if (modulus == Py_None) |
| return slot_nb_power_binary(self, other); |
| /* Three-arg power doesn't use __rpow__ */ |
| return call_method(self, "__pow__", &pow_str, |
| "OO", other, modulus); |
| } |
| |
| SLOT0(slot_nb_negative, "__neg__") |
| SLOT0(slot_nb_positive, "__pos__") |
| SLOT0(slot_nb_absolute, "__abs__") |
| |
| static int |
| slot_nb_nonzero(PyObject *self) |
| { |
| PyObject *func, *res; |
| static PyObject *nonzero_str, *len_str; |
| |
| func = lookup_method(self, "__nonzero__", &nonzero_str); |
| if (func == NULL) { |
| PyErr_Clear(); |
| func = lookup_method(self, "__len__", &len_str); |
| } |
| |
| if (func != NULL) { |
| res = PyEval_CallObject(func, NULL); |
| Py_DECREF(func); |
| if (res == NULL) |
| return -1; |
| return PyObject_IsTrue(res); |
| } |
| else { |
| PyErr_Clear(); |
| return 1; |
| } |
| } |
| |
| SLOT0(slot_nb_invert, "__invert__") |
| SLOT1BIN(slot_nb_lshift, nb_lshift, "__lshift__", "__rlshift__") |
| SLOT1BIN(slot_nb_rshift, nb_rshift, "__rshift__", "__rrshift__") |
| SLOT1BIN(slot_nb_and, nb_and, "__and__", "__rand__") |
| SLOT1BIN(slot_nb_xor, nb_xor, "__xor__", "__rxor__") |
| SLOT1BIN(slot_nb_or, nb_or, "__or__", "__ror__") |
| /* Not coerce() */ |
| SLOT0(slot_nb_int, "__int__") |
| SLOT0(slot_nb_long, "__long__") |
| SLOT0(slot_nb_float, "__float__") |
| SLOT0(slot_nb_oct, "__oct__") |
| SLOT0(slot_nb_hex, "__hex__") |
| SLOT1(slot_nb_inplace_add, "__iadd__", PyObject *, "O") |
| SLOT1(slot_nb_inplace_subtract, "__isub__", PyObject *, "O") |
| SLOT1(slot_nb_inplace_multiply, "__imul__", PyObject *, "O") |
| SLOT1(slot_nb_inplace_divide, "__idiv__", PyObject *, "O") |
| SLOT1(slot_nb_inplace_remainder, "__imod__", PyObject *, "O") |
| SLOT2(slot_nb_inplace_power, "__ipow__", PyObject *, PyObject *, "OO") |
| SLOT1(slot_nb_inplace_lshift, "__ilshift__", PyObject *, "O") |
| SLOT1(slot_nb_inplace_rshift, "__irshift__", PyObject *, "O") |
| SLOT1(slot_nb_inplace_and, "__iand__", PyObject *, "O") |
| SLOT1(slot_nb_inplace_xor, "__ixor__", PyObject *, "O") |
| SLOT1(slot_nb_inplace_or, "__ior__", PyObject *, "O") |
| SLOT1BIN(slot_nb_floor_divide, nb_floor_divide, |
| "__floordiv__", "__rfloordiv__") |
| SLOT1BIN(slot_nb_true_divide, nb_true_divide, "__truediv__", "__rtruediv__") |
| SLOT1(slot_nb_inplace_floor_divide, "__ifloordiv__", PyObject *, "O") |
| SLOT1(slot_nb_inplace_true_divide, "__itruediv__", PyObject *, "O") |
| |
| static int |
| half_compare(PyObject *self, PyObject *other) |
| { |
| PyObject *func, *args, *res; |
| static PyObject *cmp_str; |
| int c; |
| |
| func = lookup_method(self, "__cmp__", &cmp_str); |
| if (func == NULL) { |
| PyErr_Clear(); |
| } |
| else { |
| args = Py_BuildValue("(O)", other); |
| if (args == NULL) |
| res = NULL; |
| else { |
| res = PyObject_CallObject(func, args); |
| Py_DECREF(args); |
| } |
| if (res != Py_NotImplemented) { |
| if (res == NULL) |
| return -2; |
| c = PyInt_AsLong(res); |
| Py_DECREF(res); |
| if (c == -1 && PyErr_Occurred()) |
| return -2; |
| return (c < 0) ? -1 : (c > 0) ? 1 : 0; |
| } |
| Py_DECREF(res); |
| } |
| return 2; |
| } |
| |
| static int |
| slot_tp_compare(PyObject *self, PyObject *other) |
| { |
| int c; |
| |
| if (self->ob_type->tp_compare == slot_tp_compare) { |
| c = half_compare(self, other); |
| if (c <= 1) |
| return c; |
| } |
| if (other->ob_type->tp_compare == slot_tp_compare) { |
| c = half_compare(other, self); |
| if (c < -1) |
| return -2; |
| if (c <= 1) |
| return -c; |
| } |
| return (void *)self < (void *)other ? -1 : |
| (void *)self > (void *)other ? 1 : 0; |
| } |
| |
| static PyObject * |
| slot_tp_repr(PyObject *self) |
| { |
| PyObject *func, *res; |
| static PyObject *repr_str; |
| |
| func = lookup_method(self, "__repr__", &repr_str); |
| if (func != NULL) { |
| res = PyEval_CallObject(func, NULL); |
| Py_DECREF(func); |
| return res; |
| } |
| PyErr_Clear(); |
| return PyString_FromFormat("<%s object at %p>", |
| self->ob_type->tp_name, self); |
| } |
| |
| static PyObject * |
| slot_tp_str(PyObject *self) |
| { |
| PyObject *func, *res; |
| static PyObject *str_str; |
| |
| func = lookup_method(self, "__str__", &str_str); |
| if (func != NULL) { |
| res = PyEval_CallObject(func, NULL); |
| Py_DECREF(func); |
| return res; |
| } |
| else { |
| PyErr_Clear(); |
| return slot_tp_repr(self); |
| } |
| } |
| |
| static long |
| slot_tp_hash(PyObject *self) |
| { |
| PyObject *func, *res; |
| static PyObject *hash_str, *eq_str, *cmp_str; |
| |
| long h; |
| |
| func = lookup_method(self, "__hash__", &hash_str); |
| |
| if (func != NULL) { |
| res = PyEval_CallObject(func, NULL); |
| Py_DECREF(func); |
| if (res == NULL) |
| return -1; |
| h = PyInt_AsLong(res); |
| } |
| else { |
| PyErr_Clear(); |
| func = lookup_method(self, "__eq__", &eq_str); |
| if (func == NULL) { |
| PyErr_Clear(); |
| func = lookup_method(self, "__cmp__", &cmp_str); |
| } |
| if (func != NULL) { |
| Py_DECREF(func); |
| PyErr_SetString(PyExc_TypeError, "unhashable type"); |
| return -1; |
| } |
| PyErr_Clear(); |
| h = _Py_HashPointer((void *)self); |
| } |
| if (h == -1 && !PyErr_Occurred()) |
| h = -2; |
| return h; |
| } |
| |
| static PyObject * |
| slot_tp_call(PyObject *self, PyObject *args, PyObject *kwds) |
| { |
| static PyObject *call_str; |
| PyObject *meth = lookup_method(self, "__call__", &call_str); |
| PyObject *res; |
| |
| if (meth == NULL) |
| return NULL; |
| res = PyObject_Call(meth, args, kwds); |
| Py_DECREF(meth); |
| return res; |
| } |
| |
| static PyObject * |
| slot_tp_getattro(PyObject *self, PyObject *name) |
| { |
| PyTypeObject *tp = self->ob_type; |
| PyObject *getattr; |
| static PyObject *getattr_str = NULL; |
| |
| if (getattr_str == NULL) { |
| getattr_str = PyString_InternFromString("__getattr__"); |
| if (getattr_str == NULL) |
| return NULL; |
| } |
| getattr = _PyType_Lookup(tp, getattr_str); |
| if (getattr == NULL) { |
| /* Avoid further slowdowns */ |
| if (tp->tp_getattro == slot_tp_getattro) |
| tp->tp_getattro = PyObject_GenericGetAttr; |
| return PyObject_GenericGetAttr(self, name); |
| } |
| return PyObject_CallFunction(getattr, "OO", self, name); |
| } |
| |
| static int |
| slot_tp_setattro(PyObject *self, PyObject *name, PyObject *value) |
| { |
| PyObject *res; |
| static PyObject *delattr_str, *setattr_str; |
| |
| if (value == NULL) |
| res = call_method(self, "__delattr__", &delattr_str, |
| "O", name); |
| else |
| res = call_method(self, "__setattr__", &setattr_str, |
| "OO", name, value); |
| if (res == NULL) |
| return -1; |
| Py_DECREF(res); |
| return 0; |
| } |
| |
| /* Map rich comparison operators to their __xx__ namesakes */ |
| static char *name_op[] = { |
| "__lt__", |
| "__le__", |
| "__eq__", |
| "__ne__", |
| "__gt__", |
| "__ge__", |
| }; |
| |
| static PyObject * |
| half_richcompare(PyObject *self, PyObject *other, int op) |
| { |
| PyObject *func, *args, *res; |
| static PyObject *op_str[6]; |
| |
| func = lookup_method(self, name_op[op], &op_str[op]); |
| if (func == NULL) { |
| PyErr_Clear(); |
| Py_INCREF(Py_NotImplemented); |
| return Py_NotImplemented; |
| } |
| args = Py_BuildValue("(O)", other); |
| if (args == NULL) |
| res = NULL; |
| else { |
| res = PyObject_CallObject(func, args); |
| Py_DECREF(args); |
| } |
| Py_DECREF(func); |
| return res; |
| } |
| |
| /* Map rich comparison operators to their swapped version, e.g. LT --> GT */ |
| static int swapped_op[] = {Py_GT, Py_GE, Py_EQ, Py_NE, Py_LT, Py_LE}; |
| |
| static PyObject * |
| slot_tp_richcompare(PyObject *self, PyObject *other, int op) |
| { |
| PyObject *res; |
| |
| if (self->ob_type->tp_richcompare == slot_tp_richcompare) { |
| res = half_richcompare(self, other, op); |
| if (res != Py_NotImplemented) |
| return res; |
| Py_DECREF(res); |
| } |
| if (other->ob_type->tp_richcompare == slot_tp_richcompare) { |
| res = half_richcompare(other, self, swapped_op[op]); |
| if (res != Py_NotImplemented) { |
| return res; |
| } |
| Py_DECREF(res); |
| } |
| Py_INCREF(Py_NotImplemented); |
| return Py_NotImplemented; |
| } |
| |
| static PyObject * |
| slot_tp_iter(PyObject *self) |
| { |
| PyObject *func, *res; |
| static PyObject *iter_str, *getitem_str; |
| |
| func = lookup_method(self, "__iter__", &iter_str); |
| if (func != NULL) { |
| res = PyObject_CallObject(func, NULL); |
| Py_DECREF(func); |
| return res; |
| } |
| PyErr_Clear(); |
| func = lookup_method(self, "__getitem__", &getitem_str); |
| if (func == NULL) { |
| PyErr_SetString(PyExc_TypeError, "iter() of non-sequence"); |
| return NULL; |
| } |
| Py_DECREF(func); |
| return PySeqIter_New(self); |
| } |
| |
| static PyObject * |
| slot_tp_iternext(PyObject *self) |
| { |
| static PyObject *next_str; |
| return call_method(self, "next", &next_str, ""); |
| } |
| |
| static PyObject * |
| slot_tp_descr_get(PyObject *self, PyObject *obj, PyObject *type) |
| { |
| PyTypeObject *tp = self->ob_type; |
| PyObject *get; |
| static PyObject *get_str = NULL; |
| |
| if (get_str == NULL) { |
| get_str = PyString_InternFromString("__get__"); |
| if (get_str == NULL) |
| return NULL; |
| } |
| get = _PyType_Lookup(tp, get_str); |
| if (get == NULL) { |
| /* Avoid further slowdowns */ |
| if (tp->tp_descr_get == slot_tp_descr_get) |
| tp->tp_descr_get = NULL; |
| Py_INCREF(self); |
| return self; |
| } |
| if (obj == NULL) |
| obj = Py_None; |
| if (type == NULL) |
| type = Py_None; |
| return PyObject_CallFunction(get, "OOO", self, obj, type); |
| } |
| |
| static int |
| slot_tp_descr_set(PyObject *self, PyObject *target, PyObject *value) |
| { |
| PyObject *res; |
| static PyObject *del_str, *set_str; |
| |
| if (value == NULL) |
| res = call_method(self, "__del__", &del_str, |
| "O", target); |
| else |
| res = call_method(self, "__set__", &set_str, |
| "OO", target, value); |
| if (res == NULL) |
| return -1; |
| Py_DECREF(res); |
| return 0; |
| } |
| |
| static int |
| slot_tp_init(PyObject *self, PyObject *args, PyObject *kwds) |
| { |
| static PyObject *init_str; |
| PyObject *meth = lookup_method(self, "__init__", &init_str); |
| PyObject *res; |
| |
| if (meth == NULL) |
| return -1; |
| res = PyObject_Call(meth, args, kwds); |
| Py_DECREF(meth); |
| if (res == NULL) |
| return -1; |
| Py_DECREF(res); |
| return 0; |
| } |
| |
| static PyObject * |
| slot_tp_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| { |
| PyObject *func = PyObject_GetAttrString((PyObject *)type, "__new__"); |
| PyObject *newargs, *x; |
| int i, n; |
| |
| if (func == NULL) |
| return NULL; |
| assert(PyTuple_Check(args)); |
| n = PyTuple_GET_SIZE(args); |
| newargs = PyTuple_New(n+1); |
| if (newargs == NULL) |
| return NULL; |
| Py_INCREF(type); |
| PyTuple_SET_ITEM(newargs, 0, (PyObject *)type); |
| for (i = 0; i < n; i++) { |
| x = PyTuple_GET_ITEM(args, i); |
| Py_INCREF(x); |
| PyTuple_SET_ITEM(newargs, i+1, x); |
| } |
| x = PyObject_Call(func, newargs, kwds); |
| Py_DECREF(func); |
| return x; |
| } |
| |
| /* This is called at the very end of type_new() (even after |
| PyType_Ready()) to complete the initialization of dynamic types. |
| The dict argument is the dictionary argument passed to type_new(), |
| which is the local namespace of the class statement, in other |
| words, it contains the methods. For each special method (like |
| __repr__) defined in the dictionary, the corresponding function |
| slot in the type object (like tp_repr) is set to a special function |
| whose name is 'slot_' followed by the slot name and whose signature |
| is whatever is required for that slot. These slot functions look |
| up the corresponding method in the type's dictionary and call it. |
| The slot functions have to take care of the various peculiarities |
| of the mapping between slots and special methods, such as mapping |
| one slot to multiple methods (tp_richcompare <--> __le__, __lt__ |
| etc.) or mapping multiple slots to a single method (sq_item, |
| mp_subscript <--> __getitem__). */ |
| |
| static void |
| override_slots(PyTypeObject *type, PyObject *dict) |
| { |
| PySequenceMethods *sq = type->tp_as_sequence; |
| PyMappingMethods *mp = type->tp_as_mapping; |
| PyNumberMethods *nb = type->tp_as_number; |
| |
| #define SQSLOT(OPNAME, SLOTNAME, FUNCNAME) \ |
| if (dict == NULL || PyDict_GetItemString(dict, OPNAME)) { \ |
| sq->SLOTNAME = FUNCNAME; \ |
| } |
| |
| #define MPSLOT(OPNAME, SLOTNAME, FUNCNAME) \ |
| if (dict == NULL || PyDict_GetItemString(dict, OPNAME)) { \ |
| mp->SLOTNAME = FUNCNAME; \ |
| } |
| |
| #define NBSLOT(OPNAME, SLOTNAME, FUNCNAME) \ |
| if (dict == NULL || PyDict_GetItemString(dict, OPNAME)) { \ |
| nb->SLOTNAME = FUNCNAME; \ |
| } |
| |
| #define TPSLOT(OPNAME, SLOTNAME, FUNCNAME) \ |
| if (dict == NULL || PyDict_GetItemString(dict, OPNAME)) { \ |
| type->SLOTNAME = FUNCNAME; \ |
| } |
| |
| SQSLOT("__len__", sq_length, slot_sq_length); |
| SQSLOT("__add__", sq_concat, slot_sq_concat); |
| SQSLOT("__mul__", sq_repeat, slot_sq_repeat); |
| SQSLOT("__getitem__", sq_item, slot_sq_item); |
| SQSLOT("__getslice__", sq_slice, slot_sq_slice); |
| SQSLOT("__setitem__", sq_ass_item, slot_sq_ass_item); |
| SQSLOT("__delitem__", sq_ass_item, slot_sq_ass_item); |
| SQSLOT("__setslice__", sq_ass_slice, slot_sq_ass_slice); |
| SQSLOT("__delslice__", sq_ass_slice, slot_sq_ass_slice); |
| SQSLOT("__contains__", sq_contains, slot_sq_contains); |
| SQSLOT("__iadd__", sq_inplace_concat, slot_sq_inplace_concat); |
| SQSLOT("__imul__", sq_inplace_repeat, slot_sq_inplace_repeat); |
| |
| MPSLOT("__len__", mp_length, slot_mp_length); |
| MPSLOT("__getitem__", mp_subscript, slot_mp_subscript); |
| MPSLOT("__setitem__", mp_ass_subscript, slot_mp_ass_subscript); |
| MPSLOT("__delitem__", mp_ass_subscript, slot_mp_ass_subscript); |
| |
| NBSLOT("__add__", nb_add, slot_nb_add); |
| NBSLOT("__sub__", nb_subtract, slot_nb_subtract); |
| NBSLOT("__mul__", nb_multiply, slot_nb_multiply); |
| NBSLOT("__div__", nb_divide, slot_nb_divide); |
| NBSLOT("__mod__", nb_remainder, slot_nb_remainder); |
| NBSLOT("__divmod__", nb_divmod, slot_nb_divmod); |
| NBSLOT("__pow__", nb_power, slot_nb_power); |
| NBSLOT("__neg__", nb_negative, slot_nb_negative); |
| NBSLOT("__pos__", nb_positive, slot_nb_positive); |
| NBSLOT("__abs__", nb_absolute, slot_nb_absolute); |
| NBSLOT("__nonzero__", nb_nonzero, slot_nb_nonzero); |
| NBSLOT("__invert__", nb_invert, slot_nb_invert); |
| NBSLOT("__lshift__", nb_lshift, slot_nb_lshift); |
| NBSLOT("__rshift__", nb_rshift, slot_nb_rshift); |
| NBSLOT("__and__", nb_and, slot_nb_and); |
| NBSLOT("__xor__", nb_xor, slot_nb_xor); |
| NBSLOT("__or__", nb_or, slot_nb_or); |
| /* Not coerce() */ |
| NBSLOT("__int__", nb_int, slot_nb_int); |
| NBSLOT("__long__", nb_long, slot_nb_long); |
| NBSLOT("__float__", nb_float, slot_nb_float); |
| NBSLOT("__oct__", nb_oct, slot_nb_oct); |
| NBSLOT("__hex__", nb_hex, slot_nb_hex); |
| NBSLOT("__iadd__", nb_inplace_add, slot_nb_inplace_add); |
| NBSLOT("__isub__", nb_inplace_subtract, slot_nb_inplace_subtract); |
| NBSLOT("__imul__", nb_inplace_multiply, slot_nb_inplace_multiply); |
| NBSLOT("__idiv__", nb_inplace_divide, slot_nb_inplace_divide); |
| NBSLOT("__imod__", nb_inplace_remainder, slot_nb_inplace_remainder); |
| NBSLOT("__ipow__", nb_inplace_power, slot_nb_inplace_power); |
| NBSLOT("__ilshift__", nb_inplace_lshift, slot_nb_inplace_lshift); |
| NBSLOT("__irshift__", nb_inplace_rshift, slot_nb_inplace_rshift); |
| NBSLOT("__iand__", nb_inplace_and, slot_nb_inplace_and); |
| NBSLOT("__ixor__", nb_inplace_xor, slot_nb_inplace_xor); |
| NBSLOT("__ior__", nb_inplace_or, slot_nb_inplace_or); |
| NBSLOT("__floordiv__", nb_floor_divide, slot_nb_floor_divide); |
| NBSLOT("__truediv__", nb_true_divide, slot_nb_true_divide); |
| NBSLOT("__ifloordiv__", nb_inplace_floor_divide, |
| slot_nb_inplace_floor_divide); |
| NBSLOT("__itruediv__", nb_inplace_true_divide, |
| slot_nb_inplace_true_divide); |
| |
| if (dict == NULL || |
| PyDict_GetItemString(dict, "__str__") || |
| PyDict_GetItemString(dict, "__repr__")) |
| type->tp_print = NULL; |
| |
| TPSLOT("__cmp__", tp_compare, slot_tp_compare); |
| TPSLOT("__repr__", tp_repr, slot_tp_repr); |
| TPSLOT("__hash__", tp_hash, slot_tp_hash); |
| TPSLOT("__call__", tp_call, slot_tp_call); |
| TPSLOT("__str__", tp_str, slot_tp_str); |
| TPSLOT("__getattr__", tp_getattro, slot_tp_getattro); |
| TPSLOT("__setattr__", tp_setattro, slot_tp_setattro); |
| TPSLOT("__lt__", tp_richcompare, slot_tp_richcompare); |
| TPSLOT("__le__", tp_richcompare, slot_tp_richcompare); |
| TPSLOT("__eq__", tp_richcompare, slot_tp_richcompare); |
| TPSLOT("__ne__", tp_richcompare, slot_tp_richcompare); |
| TPSLOT("__gt__", tp_richcompare, slot_tp_richcompare); |
| TPSLOT("__ge__", tp_richcompare, slot_tp_richcompare); |
| TPSLOT("__iter__", tp_iter, slot_tp_iter); |
| TPSLOT("next", tp_iternext, slot_tp_iternext); |
| TPSLOT("__get__", tp_descr_get, slot_tp_descr_get); |
| TPSLOT("__set__", tp_descr_set, slot_tp_descr_set); |
| TPSLOT("__init__", tp_init, slot_tp_init); |
| TPSLOT("__new__", tp_new, slot_tp_new); |
| } |
| |
| |
| /* Cooperative 'super' */ |
| |
| typedef struct { |
| PyObject_HEAD |
| PyTypeObject *type; |
| PyObject *obj; |
| } superobject; |
| |
| static struct memberlist super_members[] = { |
| {"__type__", T_OBJECT, offsetof(superobject, type), READONLY}, |
| {"__obj__", T_OBJECT, offsetof(superobject, obj), READONLY}, |
| {0} |
| }; |
| |
| static void |
| super_dealloc(PyObject *self) |
| { |
| superobject *su = (superobject *)self; |
| |
| Py_XDECREF(su->obj); |
| Py_XDECREF(su->type); |
| self->ob_type->tp_free(self); |
| } |
| |
| static PyObject * |
| super_repr(PyObject *self) |
| { |
| superobject *su = (superobject *)self; |
| |
| if (su->obj) |
| return PyString_FromFormat( |
| "<super: <type '%s'>, <%s object>>", |
| su->type ? su->type->tp_name : "NULL", |
| su->obj->ob_type->tp_name); |
| else |
| return PyString_FromFormat( |
| "<super: <type '%s'>, NULL>", |
| su->type ? su->type->tp_name : "NULL"); |
| } |
| |
| static PyObject * |
| super_getattro(PyObject *self, PyObject *name) |
| { |
| superobject *su = (superobject *)self; |
| |
| if (su->obj != NULL) { |
| PyObject *mro, *res, *tmp; |
| descrgetfunc f; |
| int i, n; |
| |
| mro = su->obj->ob_type->tp_mro; |
| if (mro == NULL) |
| n = 0; |
| else { |
| assert(PyTuple_Check(mro)); |
| n = PyTuple_GET_SIZE(mro); |
| } |
| for (i = 0; i < n; i++) { |
| if ((PyObject *)(su->type) == PyTuple_GET_ITEM(mro, i)) |
| break; |
| } |
| if (i >= n && PyType_Check(su->obj)) { |
| mro = ((PyTypeObject *)(su->obj))->tp_mro; |
| if (mro == NULL) |
| n = 0; |
| else { |
| assert(PyTuple_Check(mro)); |
| n = PyTuple_GET_SIZE(mro); |
| } |
| for (i = 0; i < n; i++) { |
| if ((PyObject *)(su->type) == |
| PyTuple_GET_ITEM(mro, i)) |
| break; |
| } |
| } |
| i++; |
| res = NULL; |
| for (; i < n; i++) { |
| tmp = PyTuple_GET_ITEM(mro, i); |
| assert(PyType_Check(tmp)); |
| res = PyDict_GetItem( |
| ((PyTypeObject *)tmp)->tp_defined, name); |
| if (res != NULL) { |
| Py_INCREF(res); |
| f = res->ob_type->tp_descr_get; |
| if (f != NULL) { |
| tmp = f(res, su->obj, res); |
| Py_DECREF(res); |
| res = tmp; |
| } |
| return res; |
| } |
| } |
| } |
| return PyObject_GenericGetAttr(self, name); |
| } |
| |
| static PyObject * |
| super_descr_get(PyObject *self, PyObject *obj, PyObject *type) |
| { |
| superobject *su = (superobject *)self; |
| superobject *new; |
| |
| if (obj == NULL || obj == Py_None || su->obj != NULL) { |
| /* Not binding to an object, or already bound */ |
| Py_INCREF(self); |
| return self; |
| } |
| new = (superobject *)PySuper_Type.tp_new(&PySuper_Type, NULL, NULL); |
| if (new == NULL) |
| return NULL; |
| Py_INCREF(su->type); |
| Py_INCREF(obj); |
| new->type = su->type; |
| new->obj = obj; |
| return (PyObject *)new; |
| } |
| |
| static int |
| super_init(PyObject *self, PyObject *args, PyObject *kwds) |
| { |
| superobject *su = (superobject *)self; |
| PyTypeObject *type; |
| PyObject *obj = NULL; |
| |
| if (!PyArg_ParseTuple(args, "O!|O:super", &PyType_Type, &type, &obj)) |
| return -1; |
| if (obj == Py_None) |
| obj = NULL; |
| if (obj != NULL && |
| !PyType_IsSubtype(obj->ob_type, type) && |
| !(PyType_Check(obj) && |
| PyType_IsSubtype((PyTypeObject *)obj, type))) { |
| PyErr_SetString(PyExc_TypeError, |
| "super(type, obj): " |
| "obj must be an instance or subtype of type"); |
| return -1; |
| } |
| Py_INCREF(type); |
| Py_XINCREF(obj); |
| su->type = type; |
| su->obj = obj; |
| return 0; |
| } |
| |
| static char super_doc[] = |
| "super(type) -> unbound super object\n" |
| "super(type, obj) -> bound super object; requires isinstance(obj, type)\n" |
| "super(type, type2) -> bound super object; requires issubclass(type2, type)\n" |
| "Typical use to call a cooperative superclass method:\n" |
| "class C(B):\n" |
| " def meth(self, arg):\n" |
| " super(C, self).meth(arg)"; |
| |
| PyTypeObject PySuper_Type = { |
| PyObject_HEAD_INIT(&PyType_Type) |
| 0, /* ob_size */ |
| "super", /* tp_name */ |
| sizeof(superobject), /* tp_basicsize */ |
| 0, /* tp_itemsize */ |
| /* methods */ |
| super_dealloc, /* tp_dealloc */ |
| 0, /* tp_print */ |
| 0, /* tp_getattr */ |
| 0, /* tp_setattr */ |
| 0, /* tp_compare */ |
| super_repr, /* tp_repr */ |
| 0, /* tp_as_number */ |
| 0, /* tp_as_sequence */ |
| 0, /* tp_as_mapping */ |
| 0, /* tp_hash */ |
| 0, /* tp_call */ |
| 0, /* tp_str */ |
| super_getattro, /* tp_getattro */ |
| 0, /* tp_setattro */ |
| 0, /* tp_as_buffer */ |
| Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
| super_doc, /* tp_doc */ |
| 0, /* tp_traverse */ |
| 0, /* tp_clear */ |
| 0, /* tp_richcompare */ |
| 0, /* tp_weaklistoffset */ |
| 0, /* tp_iter */ |
| 0, /* tp_iternext */ |
| 0, /* tp_methods */ |
| super_members, /* tp_members */ |
| 0, /* tp_getset */ |
| 0, /* tp_base */ |
| 0, /* tp_dict */ |
| super_descr_get, /* tp_descr_get */ |
| 0, /* tp_descr_set */ |
| 0, /* tp_dictoffset */ |
| super_init, /* tp_init */ |
| PyType_GenericAlloc, /* tp_alloc */ |
| PyType_GenericNew, /* tp_new */ |
| _PyObject_Del, /* tp_free */ |
| }; |