+++ /dev/null
-/* Type object implementation */\r
-\r
-#include "Python.h"\r
-#include "structmember.h"\r
-\r
-#include <ctype.h>\r
-\r
-\r
-/* Support type attribute cache */\r
-\r
-/* The cache can keep references to the names alive for longer than\r
- they normally would. This is why the maximum size is limited to\r
- MCACHE_MAX_ATTR_SIZE, since it might be a problem if very large\r
- strings are used as attribute names. */\r
-#define MCACHE_MAX_ATTR_SIZE 100\r
-#define MCACHE_SIZE_EXP 10\r
-#define MCACHE_HASH(version, name_hash) \\r
- (((unsigned int)(version) * (unsigned int)(name_hash)) \\r
- >> (8*sizeof(unsigned int) - MCACHE_SIZE_EXP))\r
-#define MCACHE_HASH_METHOD(type, name) \\r
- MCACHE_HASH((type)->tp_version_tag, \\r
- ((PyStringObject *)(name))->ob_shash)\r
-#define MCACHE_CACHEABLE_NAME(name) \\r
- PyString_CheckExact(name) && \\r
- PyString_GET_SIZE(name) <= MCACHE_MAX_ATTR_SIZE\r
-\r
-struct method_cache_entry {\r
- unsigned int version;\r
- PyObject *name; /* reference to exactly a str or None */\r
- PyObject *value; /* borrowed */\r
-};\r
-\r
-static struct method_cache_entry method_cache[1 << MCACHE_SIZE_EXP];\r
-static unsigned int next_version_tag = 0;\r
-\r
-unsigned int\r
-PyType_ClearCache(void)\r
-{\r
- Py_ssize_t i;\r
- unsigned int cur_version_tag = next_version_tag - 1;\r
-\r
- for (i = 0; i < (1 << MCACHE_SIZE_EXP); i++) {\r
- method_cache[i].version = 0;\r
- Py_CLEAR(method_cache[i].name);\r
- method_cache[i].value = NULL;\r
- }\r
- next_version_tag = 0;\r
- /* mark all version tags as invalid */\r
- PyType_Modified(&PyBaseObject_Type);\r
- return cur_version_tag;\r
-}\r
-\r
-void\r
-PyType_Modified(PyTypeObject *type)\r
-{\r
- /* Invalidate any cached data for the specified type and all\r
- subclasses. This function is called after the base\r
- classes, mro, or attributes of the type are altered.\r
-\r
- Invariants:\r
-\r
- - Py_TPFLAGS_VALID_VERSION_TAG is never set if\r
- Py_TPFLAGS_HAVE_VERSION_TAG is not set (e.g. on type\r
- objects coming from non-recompiled extension modules)\r
-\r
- - before Py_TPFLAGS_VALID_VERSION_TAG can be set on a type,\r
- it must first be set on all super types.\r
-\r
- This function clears the Py_TPFLAGS_VALID_VERSION_TAG of a\r
- type (so it must first clear it on all subclasses). The\r
- tp_version_tag value is meaningless unless this flag is set.\r
- We don't assign new version tags eagerly, but only as\r
- needed.\r
- */\r
- PyObject *raw, *ref;\r
- Py_ssize_t i, n;\r
-\r
- if (!PyType_HasFeature(type, Py_TPFLAGS_VALID_VERSION_TAG))\r
- return;\r
-\r
- raw = type->tp_subclasses;\r
- if (raw != NULL) {\r
- n = PyList_GET_SIZE(raw);\r
- for (i = 0; i < n; i++) {\r
- ref = PyList_GET_ITEM(raw, i);\r
- ref = PyWeakref_GET_OBJECT(ref);\r
- if (ref != Py_None) {\r
- PyType_Modified((PyTypeObject *)ref);\r
- }\r
- }\r
- }\r
- type->tp_flags &= ~Py_TPFLAGS_VALID_VERSION_TAG;\r
-}\r
-\r
-static void\r
-type_mro_modified(PyTypeObject *type, PyObject *bases) {\r
- /*\r
- Check that all base classes or elements of the mro of type are\r
- able to be cached. This function is called after the base\r
- classes or mro of the type are altered.\r
-\r
- Unset HAVE_VERSION_TAG and VALID_VERSION_TAG if the type\r
- inherits from an old-style class, either directly or if it\r
- appears in the MRO of a new-style class. No support either for\r
- custom MROs that include types that are not officially super\r
- types.\r
-\r
- Called from mro_internal, which will subsequently be called on\r
- each subclass when their mro is recursively updated.\r
- */\r
- Py_ssize_t i, n;\r
- int clear = 0;\r
-\r
- if (!PyType_HasFeature(type, Py_TPFLAGS_HAVE_VERSION_TAG))\r
- return;\r
-\r
- n = PyTuple_GET_SIZE(bases);\r
- for (i = 0; i < n; i++) {\r
- PyObject *b = PyTuple_GET_ITEM(bases, i);\r
- PyTypeObject *cls;\r
-\r
- if (!PyType_Check(b) ) {\r
- clear = 1;\r
- break;\r
- }\r
-\r
- cls = (PyTypeObject *)b;\r
-\r
- if (!PyType_HasFeature(cls, Py_TPFLAGS_HAVE_VERSION_TAG) ||\r
- !PyType_IsSubtype(type, cls)) {\r
- clear = 1;\r
- break;\r
- }\r
- }\r
-\r
- if (clear)\r
- type->tp_flags &= ~(Py_TPFLAGS_HAVE_VERSION_TAG|\r
- Py_TPFLAGS_VALID_VERSION_TAG);\r
-}\r
-\r
-static int\r
-assign_version_tag(PyTypeObject *type)\r
-{\r
- /* Ensure that the tp_version_tag is valid and set\r
- Py_TPFLAGS_VALID_VERSION_TAG. To respect the invariant, this\r
- must first be done on all super classes. Return 0 if this\r
- cannot be done, 1 if Py_TPFLAGS_VALID_VERSION_TAG.\r
- */\r
- Py_ssize_t i, n;\r
- PyObject *bases;\r
-\r
- if (PyType_HasFeature(type, Py_TPFLAGS_VALID_VERSION_TAG))\r
- return 1;\r
- if (!PyType_HasFeature(type, Py_TPFLAGS_HAVE_VERSION_TAG))\r
- return 0;\r
- if (!PyType_HasFeature(type, Py_TPFLAGS_READY))\r
- return 0;\r
-\r
- type->tp_version_tag = next_version_tag++;\r
- /* for stress-testing: next_version_tag &= 0xFF; */\r
-\r
- if (type->tp_version_tag == 0) {\r
- /* wrap-around or just starting Python - clear the whole\r
- cache by filling names with references to Py_None.\r
- Values are also set to NULL for added protection, as they\r
- are borrowed reference */\r
- for (i = 0; i < (1 << MCACHE_SIZE_EXP); i++) {\r
- method_cache[i].value = NULL;\r
- Py_XDECREF(method_cache[i].name);\r
- method_cache[i].name = Py_None;\r
- Py_INCREF(Py_None);\r
- }\r
- /* mark all version tags as invalid */\r
- PyType_Modified(&PyBaseObject_Type);\r
- return 1;\r
- }\r
- bases = type->tp_bases;\r
- n = PyTuple_GET_SIZE(bases);\r
- for (i = 0; i < n; i++) {\r
- PyObject *b = PyTuple_GET_ITEM(bases, i);\r
- assert(PyType_Check(b));\r
- if (!assign_version_tag((PyTypeObject *)b))\r
- return 0;\r
- }\r
- type->tp_flags |= Py_TPFLAGS_VALID_VERSION_TAG;\r
- return 1;\r
-}\r
-\r
-\r
-static PyMemberDef type_members[] = {\r
- {"__basicsize__", T_PYSSIZET, offsetof(PyTypeObject,tp_basicsize),READONLY},\r
- {"__itemsize__", T_PYSSIZET, offsetof(PyTypeObject, tp_itemsize), READONLY},\r
- {"__flags__", T_LONG, offsetof(PyTypeObject, tp_flags), READONLY},\r
- {"__weakrefoffset__", T_LONG,\r
- offsetof(PyTypeObject, tp_weaklistoffset), READONLY},\r
- {"__base__", T_OBJECT, offsetof(PyTypeObject, tp_base), READONLY},\r
- {"__dictoffset__", T_LONG,\r
- offsetof(PyTypeObject, tp_dictoffset), READONLY},\r
- {"__mro__", T_OBJECT, offsetof(PyTypeObject, tp_mro), READONLY},\r
- {0}\r
-};\r
-\r
-static PyObject *\r
-type_name(PyTypeObject *type, void *context)\r
-{\r
- const char *s;\r
-\r
- if (type->tp_flags & Py_TPFLAGS_HEAPTYPE) {\r
- PyHeapTypeObject* et = (PyHeapTypeObject*)type;\r
-\r
- Py_INCREF(et->ht_name);\r
- return et->ht_name;\r
- }\r
- else {\r
- s = strrchr(type->tp_name, '.');\r
- if (s == NULL)\r
- s = type->tp_name;\r
- else\r
- s++;\r
- return PyString_FromString(s);\r
- }\r
-}\r
-\r
-static int\r
-type_set_name(PyTypeObject *type, PyObject *value, void *context)\r
-{\r
- PyHeapTypeObject* et;\r
- PyObject *tmp;\r
-\r
- if (!(type->tp_flags & Py_TPFLAGS_HEAPTYPE)) {\r
- PyErr_Format(PyExc_TypeError,\r
- "can't set %s.__name__", type->tp_name);\r
- return -1;\r
- }\r
- if (!value) {\r
- PyErr_Format(PyExc_TypeError,\r
- "can't delete %s.__name__", type->tp_name);\r
- return -1;\r
- }\r
- if (!PyString_Check(value)) {\r
- PyErr_Format(PyExc_TypeError,\r
- "can only assign string to %s.__name__, not '%s'",\r
- type->tp_name, Py_TYPE(value)->tp_name);\r
- return -1;\r
- }\r
- if (strlen(PyString_AS_STRING(value))\r
- != (size_t)PyString_GET_SIZE(value)) {\r
- PyErr_Format(PyExc_ValueError,\r
- "__name__ must not contain null bytes");\r
- return -1;\r
- }\r
-\r
- et = (PyHeapTypeObject*)type;\r
-\r
- Py_INCREF(value);\r
-\r
- /* Wait until et is a sane state before Py_DECREF'ing the old et->ht_name\r
- value. (Bug #16447.) */\r
- tmp = et->ht_name;\r
- et->ht_name = value;\r
-\r
- type->tp_name = PyString_AS_STRING(value);\r
- Py_DECREF(tmp);\r
-\r
- return 0;\r
-}\r
-\r
-static PyObject *\r
-type_module(PyTypeObject *type, void *context)\r
-{\r
- PyObject *mod;\r
- char *s;\r
-\r
- if (type->tp_flags & Py_TPFLAGS_HEAPTYPE) {\r
- mod = PyDict_GetItemString(type->tp_dict, "__module__");\r
- if (!mod) {\r
- PyErr_Format(PyExc_AttributeError, "__module__");\r
- return 0;\r
- }\r
- Py_XINCREF(mod);\r
- return mod;\r
- }\r
- else {\r
- s = strrchr(type->tp_name, '.');\r
- if (s != NULL)\r
- return PyString_FromStringAndSize(\r
- type->tp_name, (Py_ssize_t)(s - type->tp_name));\r
- return PyString_FromString("__builtin__");\r
- }\r
-}\r
-\r
-static int\r
-type_set_module(PyTypeObject *type, PyObject *value, void *context)\r
-{\r
- if (!(type->tp_flags & Py_TPFLAGS_HEAPTYPE)) {\r
- PyErr_Format(PyExc_TypeError,\r
- "can't set %s.__module__", type->tp_name);\r
- return -1;\r
- }\r
- if (!value) {\r
- PyErr_Format(PyExc_TypeError,\r
- "can't delete %s.__module__", type->tp_name);\r
- return -1;\r
- }\r
-\r
- PyType_Modified(type);\r
-\r
- return PyDict_SetItemString(type->tp_dict, "__module__", value);\r
-}\r
-\r
-static PyObject *\r
-type_abstractmethods(PyTypeObject *type, void *context)\r
-{\r
- PyObject *mod = NULL;\r
- /* type itself has an __abstractmethods__ descriptor (this). Don't return\r
- that. */\r
- if (type != &PyType_Type)\r
- mod = PyDict_GetItemString(type->tp_dict, "__abstractmethods__");\r
- if (!mod) {\r
- PyErr_SetString(PyExc_AttributeError, "__abstractmethods__");\r
- return NULL;\r
- }\r
- Py_XINCREF(mod);\r
- return mod;\r
-}\r
-\r
-static int\r
-type_set_abstractmethods(PyTypeObject *type, PyObject *value, void *context)\r
-{\r
- /* __abstractmethods__ should only be set once on a type, in\r
- abc.ABCMeta.__new__, so this function doesn't do anything\r
- special to update subclasses.\r
- */\r
- int abstract, res;\r
- if (value != NULL) {\r
- abstract = PyObject_IsTrue(value);\r
- if (abstract < 0)\r
- return -1;\r
- res = PyDict_SetItemString(type->tp_dict, "__abstractmethods__", value);\r
- }\r
- else {\r
- abstract = 0;\r
- res = PyDict_DelItemString(type->tp_dict, "__abstractmethods__");\r
- if (res && PyErr_ExceptionMatches(PyExc_KeyError)) {\r
- PyErr_SetString(PyExc_AttributeError, "__abstractmethods__");\r
- return -1;\r
- }\r
- }\r
- if (res == 0) {\r
- PyType_Modified(type);\r
- if (abstract)\r
- type->tp_flags |= Py_TPFLAGS_IS_ABSTRACT;\r
- else\r
- type->tp_flags &= ~Py_TPFLAGS_IS_ABSTRACT;\r
- }\r
- return res;\r
-}\r
-\r
-static PyObject *\r
-type_get_bases(PyTypeObject *type, void *context)\r
-{\r
- Py_INCREF(type->tp_bases);\r
- return type->tp_bases;\r
-}\r
-\r
-static PyTypeObject *best_base(PyObject *);\r
-static int mro_internal(PyTypeObject *);\r
-static int compatible_for_assignment(PyTypeObject *, PyTypeObject *, char *);\r
-static int add_subclass(PyTypeObject*, PyTypeObject*);\r
-static void remove_subclass(PyTypeObject *, PyTypeObject *);\r
-static void update_all_slots(PyTypeObject *);\r
-\r
-typedef int (*update_callback)(PyTypeObject *, void *);\r
-static int update_subclasses(PyTypeObject *type, PyObject *name,\r
- update_callback callback, void *data);\r
-static int recurse_down_subclasses(PyTypeObject *type, PyObject *name,\r
- update_callback callback, void *data);\r
-\r
-static int\r
-mro_subclasses(PyTypeObject *type, PyObject* temp)\r
-{\r
- PyTypeObject *subclass;\r
- PyObject *ref, *subclasses, *old_mro;\r
- Py_ssize_t i, n;\r
-\r
- subclasses = type->tp_subclasses;\r
- if (subclasses == NULL)\r
- return 0;\r
- assert(PyList_Check(subclasses));\r
- n = PyList_GET_SIZE(subclasses);\r
- for (i = 0; i < n; i++) {\r
- ref = PyList_GET_ITEM(subclasses, i);\r
- assert(PyWeakref_CheckRef(ref));\r
- subclass = (PyTypeObject *)PyWeakref_GET_OBJECT(ref);\r
- assert(subclass != NULL);\r
- if ((PyObject *)subclass == Py_None)\r
- continue;\r
- assert(PyType_Check(subclass));\r
- old_mro = subclass->tp_mro;\r
- if (mro_internal(subclass) < 0) {\r
- subclass->tp_mro = old_mro;\r
- return -1;\r
- }\r
- else {\r
- PyObject* tuple;\r
- tuple = PyTuple_Pack(2, subclass, old_mro);\r
- Py_DECREF(old_mro);\r
- if (!tuple)\r
- return -1;\r
- if (PyList_Append(temp, tuple) < 0)\r
- return -1;\r
- Py_DECREF(tuple);\r
- }\r
- if (mro_subclasses(subclass, temp) < 0)\r
- return -1;\r
- }\r
- return 0;\r
-}\r
-\r
-static int\r
-type_set_bases(PyTypeObject *type, PyObject *value, void *context)\r
-{\r
- Py_ssize_t i;\r
- int r = 0;\r
- PyObject *ob, *temp;\r
- PyTypeObject *new_base, *old_base;\r
- PyObject *old_bases, *old_mro;\r
-\r
- if (!(type->tp_flags & Py_TPFLAGS_HEAPTYPE)) {\r
- PyErr_Format(PyExc_TypeError,\r
- "can't set %s.__bases__", type->tp_name);\r
- return -1;\r
- }\r
- if (!value) {\r
- PyErr_Format(PyExc_TypeError,\r
- "can't delete %s.__bases__", type->tp_name);\r
- return -1;\r
- }\r
- if (!PyTuple_Check(value)) {\r
- PyErr_Format(PyExc_TypeError,\r
- "can only assign tuple to %s.__bases__, not %s",\r
- type->tp_name, Py_TYPE(value)->tp_name);\r
- return -1;\r
- }\r
- if (PyTuple_GET_SIZE(value) == 0) {\r
- PyErr_Format(PyExc_TypeError,\r
- "can only assign non-empty tuple to %s.__bases__, not ()",\r
- type->tp_name);\r
- return -1;\r
- }\r
- for (i = 0; i < PyTuple_GET_SIZE(value); i++) {\r
- ob = PyTuple_GET_ITEM(value, i);\r
- if (!PyClass_Check(ob) && !PyType_Check(ob)) {\r
- PyErr_Format(\r
- PyExc_TypeError,\r
- "%s.__bases__ must be tuple of old- or new-style classes, not '%s'",\r
- type->tp_name, Py_TYPE(ob)->tp_name);\r
- return -1;\r
- }\r
- if (PyType_Check(ob)) {\r
- if (PyType_IsSubtype((PyTypeObject*)ob, type)) {\r
- PyErr_SetString(PyExc_TypeError,\r
- "a __bases__ item causes an inheritance cycle");\r
- return -1;\r
- }\r
- }\r
- }\r
-\r
- new_base = best_base(value);\r
-\r
- if (!new_base) {\r
- return -1;\r
- }\r
-\r
- if (!compatible_for_assignment(type->tp_base, new_base, "__bases__"))\r
- return -1;\r
-\r
- Py_INCREF(new_base);\r
- Py_INCREF(value);\r
-\r
- old_bases = type->tp_bases;\r
- old_base = type->tp_base;\r
- old_mro = type->tp_mro;\r
-\r
- type->tp_bases = value;\r
- type->tp_base = new_base;\r
-\r
- if (mro_internal(type) < 0) {\r
- goto bail;\r
- }\r
-\r
- temp = PyList_New(0);\r
- if (!temp)\r
- goto bail;\r
-\r
- r = mro_subclasses(type, temp);\r
-\r
- if (r < 0) {\r
- for (i = 0; i < PyList_Size(temp); i++) {\r
- PyTypeObject* cls;\r
- PyObject* mro;\r
- PyArg_UnpackTuple(PyList_GET_ITEM(temp, i),\r
- "", 2, 2, &cls, &mro);\r
- Py_INCREF(mro);\r
- ob = cls->tp_mro;\r
- cls->tp_mro = mro;\r
- Py_DECREF(ob);\r
- }\r
- Py_DECREF(temp);\r
- goto bail;\r
- }\r
-\r
- Py_DECREF(temp);\r
-\r
- /* any base that was in __bases__ but now isn't, we\r
- need to remove |type| from its tp_subclasses.\r
- conversely, any class now in __bases__ that wasn't\r
- needs to have |type| added to its subclasses. */\r
-\r
- /* for now, sod that: just remove from all old_bases,\r
- add to all new_bases */\r
-\r
- for (i = PyTuple_GET_SIZE(old_bases) - 1; i >= 0; i--) {\r
- ob = PyTuple_GET_ITEM(old_bases, i);\r
- if (PyType_Check(ob)) {\r
- remove_subclass(\r
- (PyTypeObject*)ob, type);\r
- }\r
- }\r
-\r
- for (i = PyTuple_GET_SIZE(value) - 1; i >= 0; i--) {\r
- ob = PyTuple_GET_ITEM(value, i);\r
- if (PyType_Check(ob)) {\r
- if (add_subclass((PyTypeObject*)ob, type) < 0)\r
- r = -1;\r
- }\r
- }\r
-\r
- update_all_slots(type);\r
-\r
- Py_DECREF(old_bases);\r
- Py_DECREF(old_base);\r
- Py_DECREF(old_mro);\r
-\r
- return r;\r
-\r
- bail:\r
- Py_DECREF(type->tp_bases);\r
- Py_DECREF(type->tp_base);\r
- if (type->tp_mro != old_mro) {\r
- Py_DECREF(type->tp_mro);\r
- }\r
-\r
- type->tp_bases = old_bases;\r
- type->tp_base = old_base;\r
- type->tp_mro = old_mro;\r
-\r
- return -1;\r
-}\r
-\r
-static PyObject *\r
-type_dict(PyTypeObject *type, void *context)\r
-{\r
- if (type->tp_dict == NULL) {\r
- Py_INCREF(Py_None);\r
- return Py_None;\r
- }\r
- return PyDictProxy_New(type->tp_dict);\r
-}\r
-\r
-static PyObject *\r
-type_get_doc(PyTypeObject *type, void *context)\r
-{\r
- PyObject *result;\r
- if (!(type->tp_flags & Py_TPFLAGS_HEAPTYPE) && type->tp_doc != NULL)\r
- return PyString_FromString(type->tp_doc);\r
- result = PyDict_GetItemString(type->tp_dict, "__doc__");\r
- if (result == NULL) {\r
- result = Py_None;\r
- Py_INCREF(result);\r
- }\r
- else if (Py_TYPE(result)->tp_descr_get) {\r
- result = Py_TYPE(result)->tp_descr_get(result, NULL,\r
- (PyObject *)type);\r
- }\r
- else {\r
- Py_INCREF(result);\r
- }\r
- return result;\r
-}\r
-\r
-static PyObject *\r
-type___instancecheck__(PyObject *type, PyObject *inst)\r
-{\r
- switch (_PyObject_RealIsInstance(inst, type)) {\r
- case -1:\r
- return NULL;\r
- case 0:\r
- Py_RETURN_FALSE;\r
- default:\r
- Py_RETURN_TRUE;\r
- }\r
-}\r
-\r
-\r
-static PyObject *\r
-type___subclasscheck__(PyObject *type, PyObject *inst)\r
-{\r
- switch (_PyObject_RealIsSubclass(inst, type)) {\r
- case -1:\r
- return NULL;\r
- case 0:\r
- Py_RETURN_FALSE;\r
- default:\r
- Py_RETURN_TRUE;\r
- }\r
-}\r
-\r
-\r
-static PyGetSetDef type_getsets[] = {\r
- {"__name__", (getter)type_name, (setter)type_set_name, NULL},\r
- {"__bases__", (getter)type_get_bases, (setter)type_set_bases, NULL},\r
- {"__module__", (getter)type_module, (setter)type_set_module, NULL},\r
- {"__abstractmethods__", (getter)type_abstractmethods,\r
- (setter)type_set_abstractmethods, NULL},\r
- {"__dict__", (getter)type_dict, NULL, NULL},\r
- {"__doc__", (getter)type_get_doc, NULL, NULL},\r
- {0}\r
-};\r
-\r
-\r
-static PyObject*\r
-type_richcompare(PyObject *v, PyObject *w, int op)\r
-{\r
- PyObject *result;\r
- Py_uintptr_t vv, ww;\r
- int c;\r
-\r
- /* Make sure both arguments are types. */\r
- if (!PyType_Check(v) || !PyType_Check(w) ||\r
- /* If there is a __cmp__ method defined, let it be called instead\r
- of our dumb function designed merely to warn. See bug\r
- #7491. */\r
- Py_TYPE(v)->tp_compare || Py_TYPE(w)->tp_compare) {\r
- result = Py_NotImplemented;\r
- goto out;\r
- }\r
-\r
- /* Py3K warning if comparison isn't == or != */\r
- if (Py_Py3kWarningFlag && op != Py_EQ && op != Py_NE &&\r
- PyErr_WarnEx(PyExc_DeprecationWarning,\r
- "type inequality comparisons not supported "\r
- "in 3.x", 1) < 0) {\r
- return NULL;\r
- }\r
-\r
- /* Compare addresses */\r
- vv = (Py_uintptr_t)v;\r
- ww = (Py_uintptr_t)w;\r
- switch (op) {\r
- case Py_LT: c = vv < ww; break;\r
- case Py_LE: c = vv <= ww; break;\r
- case Py_EQ: c = vv == ww; break;\r
- case Py_NE: c = vv != ww; break;\r
- case Py_GT: c = vv > ww; break;\r
- case Py_GE: c = vv >= ww; break;\r
- default:\r
- result = Py_NotImplemented;\r
- goto out;\r
- }\r
- result = c ? Py_True : Py_False;\r
-\r
- /* incref and return */\r
- out:\r
- Py_INCREF(result);\r
- return result;\r
-}\r
-\r
-static PyObject *\r
-type_repr(PyTypeObject *type)\r
-{\r
- PyObject *mod, *name, *rtn;\r
- char *kind;\r
-\r
- mod = type_module(type, NULL);\r
- if (mod == NULL)\r
- PyErr_Clear();\r
- else if (!PyString_Check(mod)) {\r
- Py_DECREF(mod);\r
- mod = NULL;\r
- }\r
- name = type_name(type, NULL);\r
- if (name == NULL) {\r
- Py_XDECREF(mod);\r
- return NULL;\r
- }\r
-\r
- if (type->tp_flags & Py_TPFLAGS_HEAPTYPE)\r
- kind = "class";\r
- else\r
- kind = "type";\r
-\r
- if (mod != NULL && strcmp(PyString_AS_STRING(mod), "__builtin__")) {\r
- rtn = PyString_FromFormat("<%s '%s.%s'>",\r
- kind,\r
- PyString_AS_STRING(mod),\r
- PyString_AS_STRING(name));\r
- }\r
- else\r
- rtn = PyString_FromFormat("<%s '%s'>", kind, type->tp_name);\r
-\r
- Py_XDECREF(mod);\r
- Py_DECREF(name);\r
- return rtn;\r
-}\r
-\r
-static PyObject *\r
-type_call(PyTypeObject *type, PyObject *args, PyObject *kwds)\r
-{\r
- PyObject *obj;\r
-\r
- if (type->tp_new == NULL) {\r
- PyErr_Format(PyExc_TypeError,\r
- "cannot create '%.100s' instances",\r
- type->tp_name);\r
- return NULL;\r
- }\r
-\r
- obj = type->tp_new(type, args, kwds);\r
- if (obj != NULL) {\r
- /* Ugly exception: when the call was type(something),\r
- don't call tp_init on the result. */\r
- if (type == &PyType_Type &&\r
- PyTuple_Check(args) && PyTuple_GET_SIZE(args) == 1 &&\r
- (kwds == NULL ||\r
- (PyDict_Check(kwds) && PyDict_Size(kwds) == 0)))\r
- return obj;\r
- /* If the returned object is not an instance of type,\r
- it won't be initialized. */\r
- if (!PyType_IsSubtype(obj->ob_type, type))\r
- return obj;\r
- type = obj->ob_type;\r
- if (PyType_HasFeature(type, Py_TPFLAGS_HAVE_CLASS) &&\r
- type->tp_init != NULL &&\r
- type->tp_init(obj, args, kwds) < 0) {\r
- Py_DECREF(obj);\r
- obj = NULL;\r
- }\r
- }\r
- return obj;\r
-}\r
-\r
-PyObject *\r
-PyType_GenericAlloc(PyTypeObject *type, Py_ssize_t nitems)\r
-{\r
- PyObject *obj;\r
- const size_t size = _PyObject_VAR_SIZE(type, nitems+1);\r
- /* note that we need to add one, for the sentinel */\r
-\r
- if (PyType_IS_GC(type))\r
- obj = _PyObject_GC_Malloc(size);\r
- else\r
- obj = (PyObject *)PyObject_MALLOC(size);\r
-\r
- if (obj == NULL)\r
- return PyErr_NoMemory();\r
-\r
- memset(obj, '\0', size);\r
-\r
- if (type->tp_flags & Py_TPFLAGS_HEAPTYPE)\r
- Py_INCREF(type);\r
-\r
- if (type->tp_itemsize == 0)\r
- PyObject_INIT(obj, type);\r
- else\r
- (void) PyObject_INIT_VAR((PyVarObject *)obj, type, nitems);\r
-\r
- if (PyType_IS_GC(type))\r
- _PyObject_GC_TRACK(obj);\r
- return obj;\r
-}\r
-\r
-PyObject *\r
-PyType_GenericNew(PyTypeObject *type, PyObject *args, PyObject *kwds)\r
-{\r
- return type->tp_alloc(type, 0);\r
-}\r
-\r
-/* Helpers for subtyping */\r
-\r
-static int\r
-traverse_slots(PyTypeObject *type, PyObject *self, visitproc visit, void *arg)\r
-{\r
- Py_ssize_t i, n;\r
- PyMemberDef *mp;\r
-\r
- n = Py_SIZE(type);\r
- mp = PyHeapType_GET_MEMBERS((PyHeapTypeObject *)type);\r
- for (i = 0; i < n; i++, mp++) {\r
- if (mp->type == T_OBJECT_EX) {\r
- char *addr = (char *)self + mp->offset;\r
- PyObject *obj = *(PyObject **)addr;\r
- if (obj != NULL) {\r
- int err = visit(obj, arg);\r
- if (err)\r
- return err;\r
- }\r
- }\r
- }\r
- return 0;\r
-}\r
-\r
-static int\r
-subtype_traverse(PyObject *self, visitproc visit, void *arg)\r
-{\r
- PyTypeObject *type, *base;\r
- traverseproc basetraverse;\r
-\r
- /* Find the nearest base with a different tp_traverse,\r
- and traverse slots while we're at it */\r
- type = Py_TYPE(self);\r
- base = type;\r
- while ((basetraverse = base->tp_traverse) == subtype_traverse) {\r
- if (Py_SIZE(base)) {\r
- int err = traverse_slots(base, self, visit, arg);\r
- if (err)\r
- return err;\r
- }\r
- base = base->tp_base;\r
- assert(base);\r
- }\r
-\r
- if (type->tp_dictoffset != base->tp_dictoffset) {\r
- PyObject **dictptr = _PyObject_GetDictPtr(self);\r
- if (dictptr && *dictptr)\r
- Py_VISIT(*dictptr);\r
- }\r
-\r
- if (type->tp_flags & Py_TPFLAGS_HEAPTYPE)\r
- /* For a heaptype, the instances count as references\r
- to the type. Traverse the type so the collector\r
- can find cycles involving this link. */\r
- Py_VISIT(type);\r
-\r
- if (basetraverse)\r
- return basetraverse(self, visit, arg);\r
- return 0;\r
-}\r
-\r
-static void\r
-clear_slots(PyTypeObject *type, PyObject *self)\r
-{\r
- Py_ssize_t i, n;\r
- PyMemberDef *mp;\r
-\r
- n = Py_SIZE(type);\r
- mp = PyHeapType_GET_MEMBERS((PyHeapTypeObject *)type);\r
- for (i = 0; i < n; i++, mp++) {\r
- if (mp->type == T_OBJECT_EX && !(mp->flags & READONLY)) {\r
- char *addr = (char *)self + mp->offset;\r
- PyObject *obj = *(PyObject **)addr;\r
- if (obj != NULL) {\r
- *(PyObject **)addr = NULL;\r
- Py_DECREF(obj);\r
- }\r
- }\r
- }\r
-}\r
-\r
-static int\r
-subtype_clear(PyObject *self)\r
-{\r
- PyTypeObject *type, *base;\r
- inquiry baseclear;\r
-\r
- /* Find the nearest base with a different tp_clear\r
- and clear slots while we're at it */\r
- type = Py_TYPE(self);\r
- base = type;\r
- while ((baseclear = base->tp_clear) == subtype_clear) {\r
- if (Py_SIZE(base))\r
- clear_slots(base, self);\r
- base = base->tp_base;\r
- assert(base);\r
- }\r
-\r
- /* Clear the instance dict (if any), to break cycles involving only\r
- __dict__ slots (as in the case 'self.__dict__ is self'). */\r
- if (type->tp_dictoffset != base->tp_dictoffset) {\r
- PyObject **dictptr = _PyObject_GetDictPtr(self);\r
- if (dictptr && *dictptr)\r
- Py_CLEAR(*dictptr);\r
- }\r
-\r
- if (baseclear)\r
- return baseclear(self);\r
- return 0;\r
-}\r
-\r
-static void\r
-subtype_dealloc(PyObject *self)\r
-{\r
- PyTypeObject *type, *base;\r
- destructor basedealloc;\r
- PyThreadState *tstate = PyThreadState_GET();\r
-\r
- /* Extract the type; we expect it to be a heap type */\r
- type = Py_TYPE(self);\r
- assert(type->tp_flags & Py_TPFLAGS_HEAPTYPE);\r
-\r
- /* Test whether the type has GC exactly once */\r
-\r
- if (!PyType_IS_GC(type)) {\r
- /* It's really rare to find a dynamic type that doesn't have\r
- GC; it can only happen when deriving from 'object' and not\r
- adding any slots or instance variables. This allows\r
- certain simplifications: there's no need to call\r
- clear_slots(), or DECREF the dict, or clear weakrefs. */\r
-\r
- /* Maybe call finalizer; exit early if resurrected */\r
- if (type->tp_del) {\r
- type->tp_del(self);\r
- if (self->ob_refcnt > 0)\r
- return;\r
- }\r
-\r
- /* Find the nearest base with a different tp_dealloc */\r
- base = type;\r
- while ((basedealloc = base->tp_dealloc) == subtype_dealloc) {\r
- assert(Py_SIZE(base) == 0);\r
- base = base->tp_base;\r
- assert(base);\r
- }\r
-\r
- /* Extract the type again; tp_del may have changed it */\r
- type = Py_TYPE(self);\r
-\r
- /* Call the base tp_dealloc() */\r
- assert(basedealloc);\r
- basedealloc(self);\r
-\r
- /* Can't reference self beyond this point */\r
- Py_DECREF(type);\r
-\r
- /* Done */\r
- return;\r
- }\r
-\r
- /* We get here only if the type has GC */\r
-\r
- /* UnTrack and re-Track around the trashcan macro, alas */\r
- /* See explanation at end of function for full disclosure */\r
- PyObject_GC_UnTrack(self);\r
- ++_PyTrash_delete_nesting;\r
- ++ tstate->trash_delete_nesting;\r
- Py_TRASHCAN_SAFE_BEGIN(self);\r
- --_PyTrash_delete_nesting;\r
- -- tstate->trash_delete_nesting;\r
- /* DO NOT restore GC tracking at this point. weakref callbacks\r
- * (if any, and whether directly here or indirectly in something we\r
- * call) may trigger GC, and if self is tracked at that point, it\r
- * will look like trash to GC and GC will try to delete self again.\r
- */\r
-\r
- /* Find the nearest base with a different tp_dealloc */\r
- base = type;\r
- while ((basedealloc = base->tp_dealloc) == subtype_dealloc) {\r
- base = base->tp_base;\r
- assert(base);\r
- }\r
-\r
- /* If we added a weaklist, we clear it. Do this *before* calling\r
- the finalizer (__del__), clearing slots, or clearing the instance\r
- dict. */\r
-\r
- if (type->tp_weaklistoffset && !base->tp_weaklistoffset)\r
- PyObject_ClearWeakRefs(self);\r
-\r
- /* Maybe call finalizer; exit early if resurrected */\r
- if (type->tp_del) {\r
- _PyObject_GC_TRACK(self);\r
- type->tp_del(self);\r
- if (self->ob_refcnt > 0)\r
- goto endlabel; /* resurrected */\r
- else\r
- _PyObject_GC_UNTRACK(self);\r
- /* New weakrefs could be created during the finalizer call.\r
- If this occurs, clear them out without calling their\r
- finalizers since they might rely on part of the object\r
- being finalized that has already been destroyed. */\r
- if (type->tp_weaklistoffset && !base->tp_weaklistoffset) {\r
- /* Modeled after GET_WEAKREFS_LISTPTR() */\r
- PyWeakReference **list = (PyWeakReference **) \\r
- PyObject_GET_WEAKREFS_LISTPTR(self);\r
- while (*list)\r
- _PyWeakref_ClearRef(*list);\r
- }\r
- }\r
-\r
- /* Clear slots up to the nearest base with a different tp_dealloc */\r
- base = type;\r
- while (base->tp_dealloc == subtype_dealloc) {\r
- if (Py_SIZE(base))\r
- clear_slots(base, self);\r
- base = base->tp_base;\r
- assert(base);\r
- }\r
-\r
- /* If we added a dict, DECREF it */\r
- if (type->tp_dictoffset && !base->tp_dictoffset) {\r
- PyObject **dictptr = _PyObject_GetDictPtr(self);\r
- if (dictptr != NULL) {\r
- PyObject *dict = *dictptr;\r
- if (dict != NULL) {\r
- Py_DECREF(dict);\r
- *dictptr = NULL;\r
- }\r
- }\r
- }\r
-\r
- /* Extract the type again; tp_del may have changed it */\r
- type = Py_TYPE(self);\r
-\r
- /* Call the base tp_dealloc(); first retrack self if\r
- * basedealloc knows about gc.\r
- */\r
- if (PyType_IS_GC(base))\r
- _PyObject_GC_TRACK(self);\r
- assert(basedealloc);\r
- basedealloc(self);\r
-\r
- /* Can't reference self beyond this point */\r
- Py_DECREF(type);\r
-\r
- endlabel:\r
- ++_PyTrash_delete_nesting;\r
- ++ tstate->trash_delete_nesting;\r
- Py_TRASHCAN_SAFE_END(self);\r
- --_PyTrash_delete_nesting;\r
- -- tstate->trash_delete_nesting;\r
-\r
- /* Explanation of the weirdness around the trashcan macros:\r
-\r
- Q. What do the trashcan macros do?\r
-\r
- A. Read the comment titled "Trashcan mechanism" in object.h.\r
- For one, this explains why there must be a call to GC-untrack\r
- before the trashcan begin macro. Without understanding the\r
- trashcan code, the answers to the following questions don't make\r
- sense.\r
-\r
- Q. Why do we GC-untrack before the trashcan and then immediately\r
- GC-track again afterward?\r
-\r
- A. In the case that the base class is GC-aware, the base class\r
- probably GC-untracks the object. If it does that using the\r
- UNTRACK macro, this will crash when the object is already\r
- untracked. Because we don't know what the base class does, the\r
- only safe thing is to make sure the object is tracked when we\r
- call the base class dealloc. But... The trashcan begin macro\r
- requires that the object is *untracked* before it is called. So\r
- the dance becomes:\r
-\r
- GC untrack\r
- trashcan begin\r
- GC track\r
-\r
- Q. Why did the last question say "immediately GC-track again"?\r
- It's nowhere near immediately.\r
-\r
- A. Because the code *used* to re-track immediately. Bad Idea.\r
- self has a refcount of 0, and if gc ever gets its hands on it\r
- (which can happen if any weakref callback gets invoked), it\r
- looks like trash to gc too, and gc also tries to delete self\r
- then. But we're already deleting self. Double deallocation is\r
- a subtle disaster.\r
-\r
- Q. Why the bizarre (net-zero) manipulation of\r
- _PyTrash_delete_nesting around the trashcan macros?\r
-\r
- A. Some base classes (e.g. list) also use the trashcan mechanism.\r
- The following scenario used to be possible:\r
-\r
- - suppose the trashcan level is one below the trashcan limit\r
-\r
- - subtype_dealloc() is called\r
-\r
- - the trashcan limit is not yet reached, so the trashcan level\r
- is incremented and the code between trashcan begin and end is\r
- executed\r
-\r
- - this destroys much of the object's contents, including its\r
- slots and __dict__\r
-\r
- - basedealloc() is called; this is really list_dealloc(), or\r
- some other type which also uses the trashcan macros\r
-\r
- - the trashcan limit is now reached, so the object is put on the\r
- trashcan's to-be-deleted-later list\r
-\r
- - basedealloc() returns\r
-\r
- - subtype_dealloc() decrefs the object's type\r
-\r
- - subtype_dealloc() returns\r
-\r
- - later, the trashcan code starts deleting the objects from its\r
- to-be-deleted-later list\r
-\r
- - subtype_dealloc() is called *AGAIN* for the same object\r
-\r
- - at the very least (if the destroyed slots and __dict__ don't\r
- cause problems) the object's type gets decref'ed a second\r
- time, which is *BAD*!!!\r
-\r
- The remedy is to make sure that if the code between trashcan\r
- begin and end in subtype_dealloc() is called, the code between\r
- trashcan begin and end in basedealloc() will also be called.\r
- This is done by decrementing the level after passing into the\r
- trashcan block, and incrementing it just before leaving the\r
- block.\r
-\r
- But now it's possible that a chain of objects consisting solely\r
- of objects whose deallocator is subtype_dealloc() will defeat\r
- the trashcan mechanism completely: the decremented level means\r
- that the effective level never reaches the limit. Therefore, we\r
- *increment* the level *before* entering the trashcan block, and\r
- matchingly decrement it after leaving. This means the trashcan\r
- code will trigger a little early, but that's no big deal.\r
-\r
- Q. Are there any live examples of code in need of all this\r
- complexity?\r
-\r
- A. Yes. See SF bug 668433 for code that crashed (when Python was\r
- compiled in debug mode) before the trashcan level manipulations\r
- were added. For more discussion, see SF patches 581742, 575073\r
- and bug 574207.\r
- */\r
-}\r
-\r
-static PyTypeObject *solid_base(PyTypeObject *type);\r
-\r
-/* type test with subclassing support */\r
-\r
-int\r
-PyType_IsSubtype(PyTypeObject *a, PyTypeObject *b)\r
-{\r
- PyObject *mro;\r
-\r
- if (!(a->tp_flags & Py_TPFLAGS_HAVE_CLASS))\r
- return b == a || b == &PyBaseObject_Type;\r
-\r
- mro = a->tp_mro;\r
- if (mro != NULL) {\r
- /* Deal with multiple inheritance without recursion\r
- by walking the MRO tuple */\r
- Py_ssize_t i, n;\r
- assert(PyTuple_Check(mro));\r
- n = PyTuple_GET_SIZE(mro);\r
- for (i = 0; i < n; i++) {\r
- if (PyTuple_GET_ITEM(mro, i) == (PyObject *)b)\r
- return 1;\r
- }\r
- return 0;\r
- }\r
- else {\r
- /* a is not completely initilized yet; follow tp_base */\r
- do {\r
- if (a == b)\r
- return 1;\r
- a = a->tp_base;\r
- } while (a != NULL);\r
- return b == &PyBaseObject_Type;\r
- }\r
-}\r
-\r
-/* Internal routines to do a method lookup in the type\r
- without looking in the instance dictionary\r
- (so we can't use PyObject_GetAttr) but still binding\r
- it to the instance. The arguments are the object,\r
- the method name as a C string, and the address of a\r
- static variable used to cache the interned Python string.\r
-\r
- Two variants:\r
-\r
- - lookup_maybe() returns NULL without raising an exception\r
- when the _PyType_Lookup() call fails;\r
-\r
- - lookup_method() always raises an exception upon errors.\r
-\r
- - _PyObject_LookupSpecial() exported for the benefit of other places.\r
-*/\r
-\r
-static PyObject *\r
-lookup_maybe(PyObject *self, char *attrstr, PyObject **attrobj)\r
-{\r
- PyObject *res;\r
-\r
- if (*attrobj == NULL) {\r
- *attrobj = PyString_InternFromString(attrstr);\r
- if (*attrobj == NULL)\r
- return NULL;\r
- }\r
- res = _PyType_Lookup(Py_TYPE(self), *attrobj);\r
- if (res != NULL) {\r
- descrgetfunc f;\r
- if ((f = Py_TYPE(res)->tp_descr_get) == NULL)\r
- Py_INCREF(res);\r
- else\r
- res = f(res, self, (PyObject *)(Py_TYPE(self)));\r
- }\r
- return res;\r
-}\r
-\r
-static PyObject *\r
-lookup_method(PyObject *self, char *attrstr, PyObject **attrobj)\r
-{\r
- PyObject *res = lookup_maybe(self, attrstr, attrobj);\r
- if (res == NULL && !PyErr_Occurred())\r
- PyErr_SetObject(PyExc_AttributeError, *attrobj);\r
- return res;\r
-}\r
-\r
-PyObject *\r
-_PyObject_LookupSpecial(PyObject *self, char *attrstr, PyObject **attrobj)\r
-{\r
- assert(!PyInstance_Check(self));\r
- return lookup_maybe(self, attrstr, attrobj);\r
-}\r
-\r
-/* A variation of PyObject_CallMethod that uses lookup_method()\r
- instead of PyObject_GetAttrString(). This uses the same convention\r
- as lookup_method to cache the interned name string object. */\r
-\r
-static PyObject *\r
-call_method(PyObject *o, char *name, PyObject **nameobj, char *format, ...)\r
-{\r
- va_list va;\r
- PyObject *args, *func = 0, *retval;\r
- va_start(va, format);\r
-\r
- func = lookup_maybe(o, name, nameobj);\r
- if (func == NULL) {\r
- va_end(va);\r
- if (!PyErr_Occurred())\r
- PyErr_SetObject(PyExc_AttributeError, *nameobj);\r
- return NULL;\r
- }\r
-\r
- if (format && *format)\r
- args = Py_VaBuildValue(format, va);\r
- else\r
- args = PyTuple_New(0);\r
-\r
- va_end(va);\r
-\r
- if (args == NULL)\r
- return NULL;\r
-\r
- assert(PyTuple_Check(args));\r
- retval = PyObject_Call(func, args, NULL);\r
-\r
- Py_DECREF(args);\r
- Py_DECREF(func);\r
-\r
- return retval;\r
-}\r
-\r
-/* Clone of call_method() that returns NotImplemented when the lookup fails. */\r
-\r
-static PyObject *\r
-call_maybe(PyObject *o, char *name, PyObject **nameobj, char *format, ...)\r
-{\r
- va_list va;\r
- PyObject *args, *func = 0, *retval;\r
- va_start(va, format);\r
-\r
- func = lookup_maybe(o, name, nameobj);\r
- if (func == NULL) {\r
- va_end(va);\r
- if (!PyErr_Occurred()) {\r
- Py_INCREF(Py_NotImplemented);\r
- return Py_NotImplemented;\r
- }\r
- return NULL;\r
- }\r
-\r
- if (format && *format)\r
- args = Py_VaBuildValue(format, va);\r
- else\r
- args = PyTuple_New(0);\r
-\r
- va_end(va);\r
-\r
- if (args == NULL)\r
- return NULL;\r
-\r
- assert(PyTuple_Check(args));\r
- retval = PyObject_Call(func, args, NULL);\r
-\r
- Py_DECREF(args);\r
- Py_DECREF(func);\r
-\r
- return retval;\r
-}\r
-\r
-static int\r
-fill_classic_mro(PyObject *mro, PyObject *cls)\r
-{\r
- PyObject *bases, *base;\r
- Py_ssize_t i, n;\r
-\r
- assert(PyList_Check(mro));\r
- assert(PyClass_Check(cls));\r
- i = PySequence_Contains(mro, cls);\r
- if (i < 0)\r
- return -1;\r
- if (!i) {\r
- if (PyList_Append(mro, cls) < 0)\r
- return -1;\r
- }\r
- bases = ((PyClassObject *)cls)->cl_bases;\r
- assert(bases && PyTuple_Check(bases));\r
- n = PyTuple_GET_SIZE(bases);\r
- for (i = 0; i < n; i++) {\r
- base = PyTuple_GET_ITEM(bases, i);\r
- if (fill_classic_mro(mro, base) < 0)\r
- return -1;\r
- }\r
- return 0;\r
-}\r
-\r
-static PyObject *\r
-classic_mro(PyObject *cls)\r
-{\r
- PyObject *mro;\r
-\r
- assert(PyClass_Check(cls));\r
- mro = PyList_New(0);\r
- if (mro != NULL) {\r
- if (fill_classic_mro(mro, cls) == 0)\r
- return mro;\r
- Py_DECREF(mro);\r
- }\r
- return NULL;\r
-}\r
-\r
-/*\r
- Method resolution order algorithm C3 described in\r
- "A Monotonic Superclass Linearization for Dylan",\r
- by Kim Barrett, Bob Cassel, Paul Haahr,\r
- David A. Moon, Keith Playford, and P. Tucker Withington.\r
- (OOPSLA 1996)\r
-\r
- Some notes about the rules implied by C3:\r
-\r
- No duplicate bases.\r
- It isn't legal to repeat a class in a list of base classes.\r
-\r
- The next three properties are the 3 constraints in "C3".\r
-\r
- Local precendece order.\r
- If A precedes B in C's MRO, then A will precede B in the MRO of all\r
- subclasses of C.\r
-\r
- Monotonicity.\r
- The MRO of a class must be an extension without reordering of the\r
- MRO of each of its superclasses.\r
-\r
- Extended Precedence Graph (EPG).\r
- Linearization is consistent if there is a path in the EPG from\r
- each class to all its successors in the linearization. See\r
- the paper for definition of EPG.\r
- */\r
-\r
-static int\r
-tail_contains(PyObject *list, int whence, PyObject *o) {\r
- Py_ssize_t j, size;\r
- size = PyList_GET_SIZE(list);\r
-\r
- for (j = whence+1; j < size; j++) {\r
- if (PyList_GET_ITEM(list, j) == o)\r
- return 1;\r
- }\r
- return 0;\r
-}\r
-\r
-static PyObject *\r
-class_name(PyObject *cls)\r
-{\r
- PyObject *name = PyObject_GetAttrString(cls, "__name__");\r
- if (name == NULL) {\r
- PyErr_Clear();\r
- Py_XDECREF(name);\r
- name = PyObject_Repr(cls);\r
- }\r
- if (name == NULL)\r
- return NULL;\r
- if (!PyString_Check(name)) {\r
- Py_DECREF(name);\r
- return NULL;\r
- }\r
- return name;\r
-}\r
-\r
-static int\r
-check_duplicates(PyObject *list)\r
-{\r
- Py_ssize_t i, j, n;\r
- /* Let's use a quadratic time algorithm,\r
- assuming that the bases lists is short.\r
- */\r
- n = PyList_GET_SIZE(list);\r
- for (i = 0; i < n; i++) {\r
- PyObject *o = PyList_GET_ITEM(list, i);\r
- for (j = i + 1; j < n; j++) {\r
- if (PyList_GET_ITEM(list, j) == o) {\r
- o = class_name(o);\r
- PyErr_Format(PyExc_TypeError,\r
- "duplicate base class %s",\r
- o ? PyString_AS_STRING(o) : "?");\r
- Py_XDECREF(o);\r
- return -1;\r
- }\r
- }\r
- }\r
- return 0;\r
-}\r
-\r
-/* Raise a TypeError for an MRO order disagreement.\r
-\r
- It's hard to produce a good error message. In the absence of better\r
- insight into error reporting, report the classes that were candidates\r
- to be put next into the MRO. There is some conflict between the\r
- order in which they should be put in the MRO, but it's hard to\r
- diagnose what constraint can't be satisfied.\r
-*/\r
-\r
-static void\r
-set_mro_error(PyObject *to_merge, int *remain)\r
-{\r
- Py_ssize_t i, n, off, to_merge_size;\r
- char buf[1000];\r
- PyObject *k, *v;\r
- PyObject *set = PyDict_New();\r
- if (!set) return;\r
-\r
- to_merge_size = PyList_GET_SIZE(to_merge);\r
- for (i = 0; i < to_merge_size; i++) {\r
- PyObject *L = PyList_GET_ITEM(to_merge, i);\r
- if (remain[i] < PyList_GET_SIZE(L)) {\r
- PyObject *c = PyList_GET_ITEM(L, remain[i]);\r
- if (PyDict_SetItem(set, c, Py_None) < 0) {\r
- Py_DECREF(set);\r
- return;\r
- }\r
- }\r
- }\r
- n = PyDict_Size(set);\r
-\r
- off = PyOS_snprintf(buf, sizeof(buf), "Cannot create a \\r
-consistent method resolution\norder (MRO) for bases");\r
- i = 0;\r
- while (PyDict_Next(set, &i, &k, &v) && (size_t)off < sizeof(buf)) {\r
- PyObject *name = class_name(k);\r
- off += PyOS_snprintf(buf + off, sizeof(buf) - off, " %s",\r
- name ? PyString_AS_STRING(name) : "?");\r
- Py_XDECREF(name);\r
- if (--n && (size_t)(off+1) < sizeof(buf)) {\r
- buf[off++] = ',';\r
- buf[off] = '\0';\r
- }\r
- }\r
- PyErr_SetString(PyExc_TypeError, buf);\r
- Py_DECREF(set);\r
-}\r
-\r
-static int\r
-pmerge(PyObject *acc, PyObject* to_merge) {\r
- Py_ssize_t i, j, to_merge_size, empty_cnt;\r
- int *remain;\r
- int ok;\r
-\r
- to_merge_size = PyList_GET_SIZE(to_merge);\r
-\r
- /* remain stores an index into each sublist of to_merge.\r
- remain[i] is the index of the next base in to_merge[i]\r
- that is not included in acc.\r
- */\r
- remain = (int *)PyMem_MALLOC(SIZEOF_INT*to_merge_size);\r
- if (remain == NULL)\r
- return -1;\r
- for (i = 0; i < to_merge_size; i++)\r
- remain[i] = 0;\r
-\r
- again:\r
- empty_cnt = 0;\r
- for (i = 0; i < to_merge_size; i++) {\r
- PyObject *candidate;\r
-\r
- PyObject *cur_list = PyList_GET_ITEM(to_merge, i);\r
-\r
- if (remain[i] >= PyList_GET_SIZE(cur_list)) {\r
- empty_cnt++;\r
- continue;\r
- }\r
-\r
- /* Choose next candidate for MRO.\r
-\r
- The input sequences alone can determine the choice.\r
- If not, choose the class which appears in the MRO\r
- of the earliest direct superclass of the new class.\r
- */\r
-\r
- candidate = PyList_GET_ITEM(cur_list, remain[i]);\r
- for (j = 0; j < to_merge_size; j++) {\r
- PyObject *j_lst = PyList_GET_ITEM(to_merge, j);\r
- if (tail_contains(j_lst, remain[j], candidate)) {\r
- goto skip; /* continue outer loop */\r
- }\r
- }\r
- ok = PyList_Append(acc, candidate);\r
- if (ok < 0) {\r
- PyMem_Free(remain);\r
- return -1;\r
- }\r
- for (j = 0; j < to_merge_size; j++) {\r
- PyObject *j_lst = PyList_GET_ITEM(to_merge, j);\r
- if (remain[j] < PyList_GET_SIZE(j_lst) &&\r
- PyList_GET_ITEM(j_lst, remain[j]) == candidate) {\r
- remain[j]++;\r
- }\r
- }\r
- goto again;\r
- skip: ;\r
- }\r
-\r
- if (empty_cnt == to_merge_size) {\r
- PyMem_FREE(remain);\r
- return 0;\r
- }\r
- set_mro_error(to_merge, remain);\r
- PyMem_FREE(remain);\r
- return -1;\r
-}\r
-\r
-static PyObject *\r
-mro_implementation(PyTypeObject *type)\r
-{\r
- Py_ssize_t i, n;\r
- int ok;\r
- PyObject *bases, *result;\r
- PyObject *to_merge, *bases_aslist;\r
-\r
- if (type->tp_dict == NULL) {\r
- if (PyType_Ready(type) < 0)\r
- return NULL;\r
- }\r
-\r
- /* Find a superclass linearization that honors the constraints\r
- of the explicit lists of bases and the constraints implied by\r
- each base class.\r
-\r
- to_merge is a list of lists, where each list is a superclass\r
- linearization implied by a base class. The last element of\r
- to_merge is the declared list of bases.\r
- */\r
-\r
- bases = type->tp_bases;\r
- n = PyTuple_GET_SIZE(bases);\r
-\r
- to_merge = PyList_New(n+1);\r
- if (to_merge == NULL)\r
- return NULL;\r
-\r
- for (i = 0; i < n; i++) {\r
- PyObject *base = PyTuple_GET_ITEM(bases, i);\r
- PyObject *parentMRO;\r
- if (PyType_Check(base))\r
- parentMRO = PySequence_List(\r
- ((PyTypeObject*)base)->tp_mro);\r
- else\r
- parentMRO = classic_mro(base);\r
- if (parentMRO == NULL) {\r
- Py_DECREF(to_merge);\r
- return NULL;\r
- }\r
-\r
- PyList_SET_ITEM(to_merge, i, parentMRO);\r
- }\r
-\r
- bases_aslist = PySequence_List(bases);\r
- if (bases_aslist == NULL) {\r
- Py_DECREF(to_merge);\r
- return NULL;\r
- }\r
- /* This is just a basic sanity check. */\r
- if (check_duplicates(bases_aslist) < 0) {\r
- Py_DECREF(to_merge);\r
- Py_DECREF(bases_aslist);\r
- return NULL;\r
- }\r
- PyList_SET_ITEM(to_merge, n, bases_aslist);\r
-\r
- result = Py_BuildValue("[O]", (PyObject *)type);\r
- if (result == NULL) {\r
- Py_DECREF(to_merge);\r
- return NULL;\r
- }\r
-\r
- ok = pmerge(result, to_merge);\r
- Py_DECREF(to_merge);\r
- if (ok < 0) {\r
- Py_DECREF(result);\r
- return NULL;\r
- }\r
-\r
- return result;\r
-}\r
-\r
-static PyObject *\r
-mro_external(PyObject *self)\r
-{\r
- PyTypeObject *type = (PyTypeObject *)self;\r
-\r
- return mro_implementation(type);\r
-}\r
-\r
-static int\r
-mro_internal(PyTypeObject *type)\r
-{\r
- PyObject *mro, *result, *tuple;\r
- int checkit = 0;\r
-\r
- if (Py_TYPE(type) == &PyType_Type) {\r
- result = mro_implementation(type);\r
- }\r
- else {\r
- static PyObject *mro_str;\r
- checkit = 1;\r
- mro = lookup_method((PyObject *)type, "mro", &mro_str);\r
- if (mro == NULL)\r
- return -1;\r
- result = PyObject_CallObject(mro, NULL);\r
- Py_DECREF(mro);\r
- }\r
- if (result == NULL)\r
- return -1;\r
- tuple = PySequence_Tuple(result);\r
- Py_DECREF(result);\r
- if (tuple == NULL)\r
- return -1;\r
- if (checkit) {\r
- Py_ssize_t i, len;\r
- PyObject *cls;\r
- PyTypeObject *solid;\r
-\r
- solid = solid_base(type);\r
-\r
- len = PyTuple_GET_SIZE(tuple);\r
-\r
- for (i = 0; i < len; i++) {\r
- PyTypeObject *t;\r
- cls = PyTuple_GET_ITEM(tuple, i);\r
- if (PyClass_Check(cls))\r
- continue;\r
- else if (!PyType_Check(cls)) {\r
- PyErr_Format(PyExc_TypeError,\r
- "mro() returned a non-class ('%.500s')",\r
- Py_TYPE(cls)->tp_name);\r
- Py_DECREF(tuple);\r
- return -1;\r
- }\r
- t = (PyTypeObject*)cls;\r
- if (!PyType_IsSubtype(solid, solid_base(t))) {\r
- PyErr_Format(PyExc_TypeError,\r
- "mro() returned base with unsuitable layout ('%.500s')",\r
- t->tp_name);\r
- Py_DECREF(tuple);\r
- return -1;\r
- }\r
- }\r
- }\r
- type->tp_mro = tuple;\r
-\r
- type_mro_modified(type, type->tp_mro);\r
- /* corner case: the old-style super class might have been hidden\r
- from the custom MRO */\r
- type_mro_modified(type, type->tp_bases);\r
-\r
- PyType_Modified(type);\r
-\r
- return 0;\r
-}\r
-\r
-\r
-/* Calculate the best base amongst multiple base classes.\r
- This is the first one that's on the path to the "solid base". */\r
-\r
-static PyTypeObject *\r
-best_base(PyObject *bases)\r
-{\r
- Py_ssize_t i, n;\r
- PyTypeObject *base, *winner, *candidate, *base_i;\r
- PyObject *base_proto;\r
-\r
- assert(PyTuple_Check(bases));\r
- n = PyTuple_GET_SIZE(bases);\r
- assert(n > 0);\r
- base = NULL;\r
- winner = NULL;\r
- for (i = 0; i < n; i++) {\r
- base_proto = PyTuple_GET_ITEM(bases, i);\r
- if (PyClass_Check(base_proto))\r
- continue;\r
- if (!PyType_Check(base_proto)) {\r
- PyErr_SetString(\r
- PyExc_TypeError,\r
- "bases must be types");\r
- return NULL;\r
- }\r
- base_i = (PyTypeObject *)base_proto;\r
- if (base_i->tp_dict == NULL) {\r
- if (PyType_Ready(base_i) < 0)\r
- return NULL;\r
- }\r
- candidate = solid_base(base_i);\r
- if (winner == NULL) {\r
- winner = candidate;\r
- base = base_i;\r
- }\r
- else if (PyType_IsSubtype(winner, candidate))\r
- ;\r
- else if (PyType_IsSubtype(candidate, winner)) {\r
- winner = candidate;\r
- base = base_i;\r
- }\r
- else {\r
- PyErr_SetString(\r
- PyExc_TypeError,\r
- "multiple bases have "\r
- "instance lay-out conflict");\r
- return NULL;\r
- }\r
- }\r
- if (base == NULL)\r
- PyErr_SetString(PyExc_TypeError,\r
- "a new-style class can't have only classic bases");\r
- return base;\r
-}\r
-\r
-static int\r
-extra_ivars(PyTypeObject *type, PyTypeObject *base)\r
-{\r
- size_t t_size = type->tp_basicsize;\r
- size_t b_size = base->tp_basicsize;\r
-\r
- assert(t_size >= b_size); /* Else type smaller than base! */\r
- if (type->tp_itemsize || base->tp_itemsize) {\r
- /* If itemsize is involved, stricter rules */\r
- return t_size != b_size ||\r
- type->tp_itemsize != base->tp_itemsize;\r
- }\r
- if (type->tp_weaklistoffset && base->tp_weaklistoffset == 0 &&\r
- type->tp_weaklistoffset + sizeof(PyObject *) == t_size &&\r
- type->tp_flags & Py_TPFLAGS_HEAPTYPE)\r
- t_size -= sizeof(PyObject *);\r
- if (type->tp_dictoffset && base->tp_dictoffset == 0 &&\r
- type->tp_dictoffset + sizeof(PyObject *) == t_size &&\r
- type->tp_flags & Py_TPFLAGS_HEAPTYPE)\r
- t_size -= sizeof(PyObject *);\r
-\r
- return t_size != b_size;\r
-}\r
-\r
-static PyTypeObject *\r
-solid_base(PyTypeObject *type)\r
-{\r
- PyTypeObject *base;\r
-\r
- if (type->tp_base)\r
- base = solid_base(type->tp_base);\r
- else\r
- base = &PyBaseObject_Type;\r
- if (extra_ivars(type, base))\r
- return type;\r
- else\r
- return base;\r
-}\r
-\r
-static void object_dealloc(PyObject *);\r
-static int object_init(PyObject *, PyObject *, PyObject *);\r
-static int update_slot(PyTypeObject *, PyObject *);\r
-static void fixup_slot_dispatchers(PyTypeObject *);\r
-\r
-/*\r
- * Helpers for __dict__ descriptor. We don't want to expose the dicts\r
- * inherited from various builtin types. The builtin base usually provides\r
- * its own __dict__ descriptor, so we use that when we can.\r
- */\r
-static PyTypeObject *\r
-get_builtin_base_with_dict(PyTypeObject *type)\r
-{\r
- while (type->tp_base != NULL) {\r
- if (type->tp_dictoffset != 0 &&\r
- !(type->tp_flags & Py_TPFLAGS_HEAPTYPE))\r
- return type;\r
- type = type->tp_base;\r
- }\r
- return NULL;\r
-}\r
-\r
-static PyObject *\r
-get_dict_descriptor(PyTypeObject *type)\r
-{\r
- static PyObject *dict_str;\r
- PyObject *descr;\r
-\r
- if (dict_str == NULL) {\r
- dict_str = PyString_InternFromString("__dict__");\r
- if (dict_str == NULL)\r
- return NULL;\r
- }\r
- descr = _PyType_Lookup(type, dict_str);\r
- if (descr == NULL || !PyDescr_IsData(descr))\r
- return NULL;\r
-\r
- return descr;\r
-}\r
-\r
-static void\r
-raise_dict_descr_error(PyObject *obj)\r
-{\r
- PyErr_Format(PyExc_TypeError,\r
- "this __dict__ descriptor does not support "\r
- "'%.200s' objects", obj->ob_type->tp_name);\r
-}\r
-\r
-static PyObject *\r
-subtype_dict(PyObject *obj, void *context)\r
-{\r
- PyObject **dictptr;\r
- PyObject *dict;\r
- PyTypeObject *base;\r
-\r
- base = get_builtin_base_with_dict(obj->ob_type);\r
- if (base != NULL) {\r
- descrgetfunc func;\r
- PyObject *descr = get_dict_descriptor(base);\r
- if (descr == NULL) {\r
- raise_dict_descr_error(obj);\r
- return NULL;\r
- }\r
- func = descr->ob_type->tp_descr_get;\r
- if (func == NULL) {\r
- raise_dict_descr_error(obj);\r
- return NULL;\r
- }\r
- return func(descr, obj, (PyObject *)(obj->ob_type));\r
- }\r
-\r
- dictptr = _PyObject_GetDictPtr(obj);\r
- if (dictptr == NULL) {\r
- PyErr_SetString(PyExc_AttributeError,\r
- "This object has no __dict__");\r
- return NULL;\r
- }\r
- dict = *dictptr;\r
- if (dict == NULL)\r
- *dictptr = dict = PyDict_New();\r
- Py_XINCREF(dict);\r
- return dict;\r
-}\r
-\r
-static int\r
-subtype_setdict(PyObject *obj, PyObject *value, void *context)\r
-{\r
- PyObject **dictptr;\r
- PyObject *dict;\r
- PyTypeObject *base;\r
-\r
- base = get_builtin_base_with_dict(obj->ob_type);\r
- if (base != NULL) {\r
- descrsetfunc func;\r
- PyObject *descr = get_dict_descriptor(base);\r
- if (descr == NULL) {\r
- raise_dict_descr_error(obj);\r
- return -1;\r
- }\r
- func = descr->ob_type->tp_descr_set;\r
- if (func == NULL) {\r
- raise_dict_descr_error(obj);\r
- return -1;\r
- }\r
- return func(descr, obj, value);\r
- }\r
-\r
- dictptr = _PyObject_GetDictPtr(obj);\r
- if (dictptr == NULL) {\r
- PyErr_SetString(PyExc_AttributeError,\r
- "This object has no __dict__");\r
- return -1;\r
- }\r
- if (value != NULL && !PyDict_Check(value)) {\r
- PyErr_Format(PyExc_TypeError,\r
- "__dict__ must be set to a dictionary, "\r
- "not a '%.200s'", Py_TYPE(value)->tp_name);\r
- return -1;\r
- }\r
- dict = *dictptr;\r
- Py_XINCREF(value);\r
- *dictptr = value;\r
- Py_XDECREF(dict);\r
- return 0;\r
-}\r
-\r
-static PyObject *\r
-subtype_getweakref(PyObject *obj, void *context)\r
-{\r
- PyObject **weaklistptr;\r
- PyObject *result;\r
-\r
- if (Py_TYPE(obj)->tp_weaklistoffset == 0) {\r
- PyErr_SetString(PyExc_AttributeError,\r
- "This object has no __weakref__");\r
- return NULL;\r
- }\r
- assert(Py_TYPE(obj)->tp_weaklistoffset > 0);\r
- assert(Py_TYPE(obj)->tp_weaklistoffset + sizeof(PyObject *) <=\r
- (size_t)(Py_TYPE(obj)->tp_basicsize));\r
- weaklistptr = (PyObject **)\r
- ((char *)obj + Py_TYPE(obj)->tp_weaklistoffset);\r
- if (*weaklistptr == NULL)\r
- result = Py_None;\r
- else\r
- result = *weaklistptr;\r
- Py_INCREF(result);\r
- return result;\r
-}\r
-\r
-/* Three variants on the subtype_getsets list. */\r
-\r
-static PyGetSetDef subtype_getsets_full[] = {\r
- {"__dict__", subtype_dict, subtype_setdict,\r
- PyDoc_STR("dictionary for instance variables (if defined)")},\r
- {"__weakref__", subtype_getweakref, NULL,\r
- PyDoc_STR("list of weak references to the object (if defined)")},\r
- {0}\r
-};\r
-\r
-static PyGetSetDef subtype_getsets_dict_only[] = {\r
- {"__dict__", subtype_dict, subtype_setdict,\r
- PyDoc_STR("dictionary for instance variables (if defined)")},\r
- {0}\r
-};\r
-\r
-static PyGetSetDef subtype_getsets_weakref_only[] = {\r
- {"__weakref__", subtype_getweakref, NULL,\r
- PyDoc_STR("list of weak references to the object (if defined)")},\r
- {0}\r
-};\r
-\r
-static int\r
-valid_identifier(PyObject *s)\r
-{\r
- unsigned char *p;\r
- Py_ssize_t i, n;\r
-\r
- if (!PyString_Check(s)) {\r
- PyErr_Format(PyExc_TypeError,\r
- "__slots__ items must be strings, not '%.200s'",\r
- Py_TYPE(s)->tp_name);\r
- return 0;\r
- }\r
- p = (unsigned char *) PyString_AS_STRING(s);\r
- n = PyString_GET_SIZE(s);\r
- /* We must reject an empty name. As a hack, we bump the\r
- length to 1 so that the loop will balk on the trailing \0. */\r
- if (n == 0)\r
- n = 1;\r
- for (i = 0; i < n; i++, p++) {\r
- if (!(i == 0 ? isalpha(*p) : isalnum(*p)) && *p != '_') {\r
- PyErr_SetString(PyExc_TypeError,\r
- "__slots__ must be identifiers");\r
- return 0;\r
- }\r
- }\r
- return 1;\r
-}\r
-\r
-#ifdef Py_USING_UNICODE\r
-/* Replace Unicode objects in slots. */\r
-\r
-static PyObject *\r
-_unicode_to_string(PyObject *slots, Py_ssize_t nslots)\r
-{\r
- PyObject *tmp = NULL;\r
- PyObject *slot_name, *new_name;\r
- Py_ssize_t i;\r
-\r
- for (i = 0; i < nslots; i++) {\r
- if (PyUnicode_Check(slot_name = PyTuple_GET_ITEM(slots, i))) {\r
- if (tmp == NULL) {\r
- tmp = PySequence_List(slots);\r
- if (tmp == NULL)\r
- return NULL;\r
- }\r
- new_name = _PyUnicode_AsDefaultEncodedString(slot_name,\r
- NULL);\r
- if (new_name == NULL) {\r
- Py_DECREF(tmp);\r
- return NULL;\r
- }\r
- Py_INCREF(new_name);\r
- PyList_SET_ITEM(tmp, i, new_name);\r
- Py_DECREF(slot_name);\r
- }\r
- }\r
- if (tmp != NULL) {\r
- slots = PyList_AsTuple(tmp);\r
- Py_DECREF(tmp);\r
- }\r
- return slots;\r
-}\r
-#endif\r
-\r
-/* Forward */\r
-static int\r
-object_init(PyObject *self, PyObject *args, PyObject *kwds);\r
-\r
-static int\r
-type_init(PyObject *cls, PyObject *args, PyObject *kwds)\r
-{\r
- int res;\r
-\r
- assert(args != NULL && PyTuple_Check(args));\r
- assert(kwds == NULL || PyDict_Check(kwds));\r
-\r
- if (kwds != NULL && PyDict_Check(kwds) && PyDict_Size(kwds) != 0) {\r
- PyErr_SetString(PyExc_TypeError,\r
- "type.__init__() takes no keyword arguments");\r
- return -1;\r
- }\r
-\r
- if (args != NULL && PyTuple_Check(args) &&\r
- (PyTuple_GET_SIZE(args) != 1 && PyTuple_GET_SIZE(args) != 3)) {\r
- PyErr_SetString(PyExc_TypeError,\r
- "type.__init__() takes 1 or 3 arguments");\r
- return -1;\r
- }\r
-\r
- /* Call object.__init__(self) now. */\r
- /* XXX Could call super(type, cls).__init__() but what's the point? */\r
- args = PyTuple_GetSlice(args, 0, 0);\r
- res = object_init(cls, args, NULL);\r
- Py_DECREF(args);\r
- return res;\r
-}\r
-\r
-static PyObject *\r
-type_new(PyTypeObject *metatype, PyObject *args, PyObject *kwds)\r
-{\r
- PyObject *name, *bases, *dict;\r
- static char *kwlist[] = {"name", "bases", "dict", 0};\r
- PyObject *slots, *tmp, *newslots;\r
- PyTypeObject *type, *base, *tmptype, *winner;\r
- PyHeapTypeObject *et;\r
- PyMemberDef *mp;\r
- Py_ssize_t i, nbases, nslots, slotoffset, add_dict, add_weak;\r
- int j, may_add_dict, may_add_weak;\r
-\r
- assert(args != NULL && PyTuple_Check(args));\r
- assert(kwds == NULL || PyDict_Check(kwds));\r
-\r
- /* Special case: type(x) should return x->ob_type */\r
- {\r
- const Py_ssize_t nargs = PyTuple_GET_SIZE(args);\r
- const Py_ssize_t nkwds = kwds == NULL ? 0 : PyDict_Size(kwds);\r
-\r
- if (PyType_CheckExact(metatype) && nargs == 1 && nkwds == 0) {\r
- PyObject *x = PyTuple_GET_ITEM(args, 0);\r
- Py_INCREF(Py_TYPE(x));\r
- return (PyObject *) Py_TYPE(x);\r
- }\r
-\r
- /* SF bug 475327 -- if that didn't trigger, we need 3\r
- arguments. but PyArg_ParseTupleAndKeywords below may give\r
- a msg saying type() needs exactly 3. */\r
- if (nargs + nkwds != 3) {\r
- PyErr_SetString(PyExc_TypeError,\r
- "type() takes 1 or 3 arguments");\r
- return NULL;\r
- }\r
- }\r
-\r
- /* Check arguments: (name, bases, dict) */\r
- if (!PyArg_ParseTupleAndKeywords(args, kwds, "SO!O!:type", kwlist,\r
- &name,\r
- &PyTuple_Type, &bases,\r
- &PyDict_Type, &dict))\r
- return NULL;\r
-\r
- /* Determine the proper metatype to deal with this,\r
- and check for metatype conflicts while we're at it.\r
- Note that if some other metatype wins to contract,\r
- it's possible that its instances are not types. */\r
- nbases = PyTuple_GET_SIZE(bases);\r
- winner = metatype;\r
- for (i = 0; i < nbases; i++) {\r
- tmp = PyTuple_GET_ITEM(bases, i);\r
- tmptype = tmp->ob_type;\r
- if (tmptype == &PyClass_Type)\r
- continue; /* Special case classic classes */\r
- if (PyType_IsSubtype(winner, tmptype))\r
- continue;\r
- if (PyType_IsSubtype(tmptype, winner)) {\r
- winner = tmptype;\r
- continue;\r
- }\r
- PyErr_SetString(PyExc_TypeError,\r
- "metaclass conflict: "\r
- "the metaclass of a derived class "\r
- "must be a (non-strict) subclass "\r
- "of the metaclasses of all its bases");\r
- return NULL;\r
- }\r
- if (winner != metatype) {\r
- if (winner->tp_new != type_new) /* Pass it to the winner */\r
- return winner->tp_new(winner, args, kwds);\r
- metatype = winner;\r
- }\r
-\r
- /* Adjust for empty tuple bases */\r
- if (nbases == 0) {\r
- bases = PyTuple_Pack(1, &PyBaseObject_Type);\r
- if (bases == NULL)\r
- return NULL;\r
- nbases = 1;\r
- }\r
- else\r
- Py_INCREF(bases);\r
-\r
- /* XXX From here until type is allocated, "return NULL" leaks bases! */\r
-\r
- /* Calculate best base, and check that all bases are type objects */\r
- base = best_base(bases);\r
- if (base == NULL) {\r
- Py_DECREF(bases);\r
- return NULL;\r
- }\r
- if (!PyType_HasFeature(base, Py_TPFLAGS_BASETYPE)) {\r
- PyErr_Format(PyExc_TypeError,\r
- "type '%.100s' is not an acceptable base type",\r
- base->tp_name);\r
- Py_DECREF(bases);\r
- return NULL;\r
- }\r
-\r
- /* Check for a __slots__ sequence variable in dict, and count it */\r
- slots = PyDict_GetItemString(dict, "__slots__");\r
- nslots = 0;\r
- add_dict = 0;\r
- add_weak = 0;\r
- may_add_dict = base->tp_dictoffset == 0;\r
- may_add_weak = base->tp_weaklistoffset == 0 && base->tp_itemsize == 0;\r
- if (slots == NULL) {\r
- if (may_add_dict) {\r
- add_dict++;\r
- }\r
- if (may_add_weak) {\r
- add_weak++;\r
- }\r
- }\r
- else {\r
- /* Have slots */\r
-\r
- /* Make it into a tuple */\r
- if (PyString_Check(slots) || PyUnicode_Check(slots))\r
- slots = PyTuple_Pack(1, slots);\r
- else\r
- slots = PySequence_Tuple(slots);\r
- if (slots == NULL) {\r
- Py_DECREF(bases);\r
- return NULL;\r
- }\r
- assert(PyTuple_Check(slots));\r
-\r
- /* Are slots allowed? */\r
- nslots = PyTuple_GET_SIZE(slots);\r
- if (nslots > 0 && base->tp_itemsize != 0) {\r
- PyErr_Format(PyExc_TypeError,\r
- "nonempty __slots__ "\r
- "not supported for subtype of '%s'",\r
- base->tp_name);\r
- bad_slots:\r
- Py_DECREF(bases);\r
- Py_DECREF(slots);\r
- return NULL;\r
- }\r
-\r
-#ifdef Py_USING_UNICODE\r
- tmp = _unicode_to_string(slots, nslots);\r
- if (tmp == NULL)\r
- goto bad_slots;\r
- if (tmp != slots) {\r
- Py_DECREF(slots);\r
- slots = tmp;\r
- }\r
-#endif\r
- /* Check for valid slot names and two special cases */\r
- for (i = 0; i < nslots; i++) {\r
- PyObject *tmp = PyTuple_GET_ITEM(slots, i);\r
- char *s;\r
- if (!valid_identifier(tmp))\r
- goto bad_slots;\r
- assert(PyString_Check(tmp));\r
- s = PyString_AS_STRING(tmp);\r
- if (strcmp(s, "__dict__") == 0) {\r
- if (!may_add_dict || add_dict) {\r
- PyErr_SetString(PyExc_TypeError,\r
- "__dict__ slot disallowed: "\r
- "we already got one");\r
- goto bad_slots;\r
- }\r
- add_dict++;\r
- }\r
- if (strcmp(s, "__weakref__") == 0) {\r
- if (!may_add_weak || add_weak) {\r
- PyErr_SetString(PyExc_TypeError,\r
- "__weakref__ slot disallowed: "\r
- "either we already got one, "\r
- "or __itemsize__ != 0");\r
- goto bad_slots;\r
- }\r
- add_weak++;\r
- }\r
- }\r
-\r
- /* Copy slots into a list, mangle names and sort them.\r
- Sorted names are needed for __class__ assignment.\r
- Convert them back to tuple at the end.\r
- */\r
- newslots = PyList_New(nslots - add_dict - add_weak);\r
- if (newslots == NULL)\r
- goto bad_slots;\r
- for (i = j = 0; i < nslots; i++) {\r
- char *s;\r
- tmp = PyTuple_GET_ITEM(slots, i);\r
- s = PyString_AS_STRING(tmp);\r
- if ((add_dict && strcmp(s, "__dict__") == 0) ||\r
- (add_weak && strcmp(s, "__weakref__") == 0))\r
- continue;\r
- tmp =_Py_Mangle(name, tmp);\r
- if (!tmp) {\r
- Py_DECREF(newslots);\r
- goto bad_slots;\r
- }\r
- PyList_SET_ITEM(newslots, j, tmp);\r
- j++;\r
- }\r
- assert(j == nslots - add_dict - add_weak);\r
- nslots = j;\r
- Py_DECREF(slots);\r
- if (PyList_Sort(newslots) == -1) {\r
- Py_DECREF(bases);\r
- Py_DECREF(newslots);\r
- return NULL;\r
- }\r
- slots = PyList_AsTuple(newslots);\r
- Py_DECREF(newslots);\r
- if (slots == NULL) {\r
- Py_DECREF(bases);\r
- return NULL;\r
- }\r
-\r
- /* Secondary bases may provide weakrefs or dict */\r
- if (nbases > 1 &&\r
- ((may_add_dict && !add_dict) ||\r
- (may_add_weak && !add_weak))) {\r
- for (i = 0; i < nbases; i++) {\r
- tmp = PyTuple_GET_ITEM(bases, i);\r
- if (tmp == (PyObject *)base)\r
- continue; /* Skip primary base */\r
- if (PyClass_Check(tmp)) {\r
- /* Classic base class provides both */\r
- if (may_add_dict && !add_dict)\r
- add_dict++;\r
- if (may_add_weak && !add_weak)\r
- add_weak++;\r
- break;\r
- }\r
- assert(PyType_Check(tmp));\r
- tmptype = (PyTypeObject *)tmp;\r
- if (may_add_dict && !add_dict &&\r
- tmptype->tp_dictoffset != 0)\r
- add_dict++;\r
- if (may_add_weak && !add_weak &&\r
- tmptype->tp_weaklistoffset != 0)\r
- add_weak++;\r
- if (may_add_dict && !add_dict)\r
- continue;\r
- if (may_add_weak && !add_weak)\r
- continue;\r
- /* Nothing more to check */\r
- break;\r
- }\r
- }\r
- }\r
-\r
- /* XXX From here until type is safely allocated,\r
- "return NULL" may leak slots! */\r
-\r
- /* Allocate the type object */\r
- type = (PyTypeObject *)metatype->tp_alloc(metatype, nslots);\r
- if (type == NULL) {\r
- Py_XDECREF(slots);\r
- Py_DECREF(bases);\r
- return NULL;\r
- }\r
-\r
- /* Keep name and slots alive in the extended type object */\r
- et = (PyHeapTypeObject *)type;\r
- Py_INCREF(name);\r
- et->ht_name = name;\r
- et->ht_slots = slots;\r
-\r
- /* Initialize tp_flags */\r
- type->tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HEAPTYPE |\r
- Py_TPFLAGS_BASETYPE;\r
- if (base->tp_flags & Py_TPFLAGS_HAVE_GC)\r
- type->tp_flags |= Py_TPFLAGS_HAVE_GC;\r
- if (base->tp_flags & Py_TPFLAGS_HAVE_NEWBUFFER)\r
- type->tp_flags |= Py_TPFLAGS_HAVE_NEWBUFFER;\r
-\r
- /* It's a new-style number unless it specifically inherits any\r
- old-style numeric behavior */\r
- if ((base->tp_flags & Py_TPFLAGS_CHECKTYPES) ||\r
- (base->tp_as_number == NULL))\r
- type->tp_flags |= Py_TPFLAGS_CHECKTYPES;\r
-\r
- /* Initialize essential fields */\r
- type->tp_as_number = &et->as_number;\r
- type->tp_as_sequence = &et->as_sequence;\r
- type->tp_as_mapping = &et->as_mapping;\r
- type->tp_as_buffer = &et->as_buffer;\r
- type->tp_name = PyString_AS_STRING(name);\r
-\r
- /* Set tp_base and tp_bases */\r
- type->tp_bases = bases;\r
- Py_INCREF(base);\r
- type->tp_base = base;\r
-\r
- /* Initialize tp_dict from passed-in dict */\r
- type->tp_dict = dict = PyDict_Copy(dict);\r
- if (dict == NULL) {\r
- Py_DECREF(type);\r
- return NULL;\r
- }\r
-\r
- /* Set __module__ in the dict */\r
- if (PyDict_GetItemString(dict, "__module__") == NULL) {\r
- tmp = PyEval_GetGlobals();\r
- if (tmp != NULL) {\r
- tmp = PyDict_GetItemString(tmp, "__name__");\r
- if (tmp != NULL) {\r
- if (PyDict_SetItemString(dict, "__module__",\r
- tmp) < 0)\r
- return NULL;\r
- }\r
- }\r
- }\r
-\r
- /* Set tp_doc to a copy of dict['__doc__'], if the latter is there\r
- and is a string. The __doc__ accessor will first look for tp_doc;\r
- if that fails, it will still look into __dict__.\r
- */\r
- {\r
- PyObject *doc = PyDict_GetItemString(dict, "__doc__");\r
- if (doc != NULL && PyString_Check(doc)) {\r
- const size_t n = (size_t)PyString_GET_SIZE(doc);\r
- char *tp_doc = (char *)PyObject_MALLOC(n+1);\r
- if (tp_doc == NULL) {\r
- Py_DECREF(type);\r
- return NULL;\r
- }\r
- memcpy(tp_doc, PyString_AS_STRING(doc), n+1);\r
- type->tp_doc = tp_doc;\r
- }\r
- }\r
-\r
- /* Special-case __new__: if it's a plain function,\r
- make it a static function */\r
- tmp = PyDict_GetItemString(dict, "__new__");\r
- if (tmp != NULL && PyFunction_Check(tmp)) {\r
- tmp = PyStaticMethod_New(tmp);\r
- if (tmp == NULL) {\r
- Py_DECREF(type);\r
- return NULL;\r
- }\r
- PyDict_SetItemString(dict, "__new__", tmp);\r
- Py_DECREF(tmp);\r
- }\r
-\r
- /* Add descriptors for custom slots from __slots__, or for __dict__ */\r
- mp = PyHeapType_GET_MEMBERS(et);\r
- slotoffset = base->tp_basicsize;\r
- if (slots != NULL) {\r
- for (i = 0; i < nslots; i++, mp++) {\r
- mp->name = PyString_AS_STRING(\r
- PyTuple_GET_ITEM(slots, i));\r
- mp->type = T_OBJECT_EX;\r
- mp->offset = slotoffset;\r
-\r
- /* __dict__ and __weakref__ are already filtered out */\r
- assert(strcmp(mp->name, "__dict__") != 0);\r
- assert(strcmp(mp->name, "__weakref__") != 0);\r
-\r
- slotoffset += sizeof(PyObject *);\r
- }\r
- }\r
- if (add_dict) {\r
- if (base->tp_itemsize)\r
- type->tp_dictoffset = -(long)sizeof(PyObject *);\r
- else\r
- type->tp_dictoffset = slotoffset;\r
- slotoffset += sizeof(PyObject *);\r
- }\r
- if (add_weak) {\r
- assert(!base->tp_itemsize);\r
- type->tp_weaklistoffset = slotoffset;\r
- slotoffset += sizeof(PyObject *);\r
- }\r
- type->tp_basicsize = slotoffset;\r
- type->tp_itemsize = base->tp_itemsize;\r
- type->tp_members = PyHeapType_GET_MEMBERS(et);\r
-\r
- if (type->tp_weaklistoffset && type->tp_dictoffset)\r
- type->tp_getset = subtype_getsets_full;\r
- else if (type->tp_weaklistoffset && !type->tp_dictoffset)\r
- type->tp_getset = subtype_getsets_weakref_only;\r
- else if (!type->tp_weaklistoffset && type->tp_dictoffset)\r
- type->tp_getset = subtype_getsets_dict_only;\r
- else\r
- type->tp_getset = NULL;\r
-\r
- /* Special case some slots */\r
- if (type->tp_dictoffset != 0 || nslots > 0) {\r
- if (base->tp_getattr == NULL && base->tp_getattro == NULL)\r
- type->tp_getattro = PyObject_GenericGetAttr;\r
- if (base->tp_setattr == NULL && base->tp_setattro == NULL)\r
- type->tp_setattro = PyObject_GenericSetAttr;\r
- }\r
- type->tp_dealloc = subtype_dealloc;\r
-\r
- /* Enable GC unless there are really no instance variables possible */\r
- if (!(type->tp_basicsize == sizeof(PyObject) &&\r
- type->tp_itemsize == 0))\r
- type->tp_flags |= Py_TPFLAGS_HAVE_GC;\r
-\r
- /* Always override allocation strategy to use regular heap */\r
- type->tp_alloc = PyType_GenericAlloc;\r
- if (type->tp_flags & Py_TPFLAGS_HAVE_GC) {\r
- type->tp_free = PyObject_GC_Del;\r
- type->tp_traverse = subtype_traverse;\r
- type->tp_clear = subtype_clear;\r
- }\r
- else\r
- type->tp_free = PyObject_Del;\r
-\r
- /* Initialize the rest */\r
- if (PyType_Ready(type) < 0) {\r
- Py_DECREF(type);\r
- return NULL;\r
- }\r
-\r
- /* Put the proper slots in place */\r
- fixup_slot_dispatchers(type);\r
-\r
- return (PyObject *)type;\r
-}\r
-\r
-/* Internal API to look for a name through the MRO.\r
- This returns a borrowed reference, and doesn't set an exception! */\r
-PyObject *\r
-_PyType_Lookup(PyTypeObject *type, PyObject *name)\r
-{\r
- Py_ssize_t i, n;\r
- PyObject *mro, *res, *base, *dict;\r
- unsigned int h;\r
-\r
- if (MCACHE_CACHEABLE_NAME(name) &&\r
- PyType_HasFeature(type, Py_TPFLAGS_VALID_VERSION_TAG)) {\r
- /* fast path */\r
- h = MCACHE_HASH_METHOD(type, name);\r
- if (method_cache[h].version == type->tp_version_tag &&\r
- method_cache[h].name == name)\r
- return method_cache[h].value;\r
- }\r
-\r
- /* Look in tp_dict of types in MRO */\r
- mro = type->tp_mro;\r
-\r
- /* If mro is NULL, the type is either not yet initialized\r
- by PyType_Ready(), or already cleared by type_clear().\r
- Either way the safest thing to do is to return NULL. */\r
- if (mro == NULL)\r
- return NULL;\r
-\r
- res = NULL;\r
- assert(PyTuple_Check(mro));\r
- n = PyTuple_GET_SIZE(mro);\r
- for (i = 0; i < n; i++) {\r
- base = PyTuple_GET_ITEM(mro, i);\r
- if (PyClass_Check(base))\r
- dict = ((PyClassObject *)base)->cl_dict;\r
- else {\r
- assert(PyType_Check(base));\r
- dict = ((PyTypeObject *)base)->tp_dict;\r
- }\r
- assert(dict && PyDict_Check(dict));\r
- res = PyDict_GetItem(dict, name);\r
- if (res != NULL)\r
- break;\r
- }\r
-\r
- if (MCACHE_CACHEABLE_NAME(name) && assign_version_tag(type)) {\r
- h = MCACHE_HASH_METHOD(type, name);\r
- method_cache[h].version = type->tp_version_tag;\r
- method_cache[h].value = res; /* borrowed */\r
- Py_INCREF(name);\r
- Py_DECREF(method_cache[h].name);\r
- method_cache[h].name = name;\r
- }\r
- return res;\r
-}\r
-\r
-/* This is similar to PyObject_GenericGetAttr(),\r
- but uses _PyType_Lookup() instead of just looking in type->tp_dict. */\r
-static PyObject *\r
-type_getattro(PyTypeObject *type, PyObject *name)\r
-{\r
- PyTypeObject *metatype = Py_TYPE(type);\r
- PyObject *meta_attribute, *attribute;\r
- descrgetfunc meta_get;\r
-\r
- if (!PyString_Check(name)) {\r
- PyErr_Format(PyExc_TypeError,\r
- "attribute name must be string, not '%.200s'",\r
- name->ob_type->tp_name);\r
- return NULL;\r
- }\r
-\r
- /* Initialize this type (we'll assume the metatype is initialized) */\r
- if (type->tp_dict == NULL) {\r
- if (PyType_Ready(type) < 0)\r
- return NULL;\r
- }\r
-\r
- /* No readable descriptor found yet */\r
- meta_get = NULL;\r
-\r
- /* Look for the attribute in the metatype */\r
- meta_attribute = _PyType_Lookup(metatype, name);\r
-\r
- if (meta_attribute != NULL) {\r
- meta_get = Py_TYPE(meta_attribute)->tp_descr_get;\r
-\r
- if (meta_get != NULL && PyDescr_IsData(meta_attribute)) {\r
- /* Data descriptors implement tp_descr_set to intercept\r
- * writes. Assume the attribute is not overridden in\r
- * type's tp_dict (and bases): call the descriptor now.\r
- */\r
- return meta_get(meta_attribute, (PyObject *)type,\r
- (PyObject *)metatype);\r
- }\r
- Py_INCREF(meta_attribute);\r
- }\r
-\r
- /* No data descriptor found on metatype. Look in tp_dict of this\r
- * type and its bases */\r
- attribute = _PyType_Lookup(type, name);\r
- if (attribute != NULL) {\r
- /* Implement descriptor functionality, if any */\r
- descrgetfunc local_get = Py_TYPE(attribute)->tp_descr_get;\r
-\r
- Py_XDECREF(meta_attribute);\r
-\r
- if (local_get != NULL) {\r
- /* NULL 2nd argument indicates the descriptor was\r
- * found on the target object itself (or a base) */\r
- return local_get(attribute, (PyObject *)NULL,\r
- (PyObject *)type);\r
- }\r
-\r
- Py_INCREF(attribute);\r
- return attribute;\r
- }\r
-\r
- /* No attribute found in local __dict__ (or bases): use the\r
- * descriptor from the metatype, if any */\r
- if (meta_get != NULL) {\r
- PyObject *res;\r
- res = meta_get(meta_attribute, (PyObject *)type,\r
- (PyObject *)metatype);\r
- Py_DECREF(meta_attribute);\r
- return res;\r
- }\r
-\r
- /* If an ordinary attribute was found on the metatype, return it now */\r
- if (meta_attribute != NULL) {\r
- return meta_attribute;\r
- }\r
-\r
- /* Give up */\r
- PyErr_Format(PyExc_AttributeError,\r
- "type object '%.50s' has no attribute '%.400s'",\r
- type->tp_name, PyString_AS_STRING(name));\r
- return NULL;\r
-}\r
-\r
-static int\r
-type_setattro(PyTypeObject *type, PyObject *name, PyObject *value)\r
-{\r
- if (!(type->tp_flags & Py_TPFLAGS_HEAPTYPE)) {\r
- PyErr_Format(\r
- PyExc_TypeError,\r
- "can't set attributes of built-in/extension type '%s'",\r
- type->tp_name);\r
- return -1;\r
- }\r
- if (PyObject_GenericSetAttr((PyObject *)type, name, value) < 0)\r
- return -1;\r
- return update_slot(type, name);\r
-}\r
-\r
-static void\r
-type_dealloc(PyTypeObject *type)\r
-{\r
- PyHeapTypeObject *et;\r
-\r
- /* Assert this is a heap-allocated type object */\r
- assert(type->tp_flags & Py_TPFLAGS_HEAPTYPE);\r
- _PyObject_GC_UNTRACK(type);\r
- PyObject_ClearWeakRefs((PyObject *)type);\r
- et = (PyHeapTypeObject *)type;\r
- Py_XDECREF(type->tp_base);\r
- Py_XDECREF(type->tp_dict);\r
- Py_XDECREF(type->tp_bases);\r
- Py_XDECREF(type->tp_mro);\r
- Py_XDECREF(type->tp_cache);\r
- Py_XDECREF(type->tp_subclasses);\r
- /* A type's tp_doc is heap allocated, unlike the tp_doc slots\r
- * of most other objects. It's okay to cast it to char *.\r
- */\r
- PyObject_Free((char *)type->tp_doc);\r
- Py_XDECREF(et->ht_name);\r
- Py_XDECREF(et->ht_slots);\r
- Py_TYPE(type)->tp_free((PyObject *)type);\r
-}\r
-\r
-static PyObject *\r
-type_subclasses(PyTypeObject *type, PyObject *args_ignored)\r
-{\r
- PyObject *list, *raw, *ref;\r
- Py_ssize_t i, n;\r
-\r
- list = PyList_New(0);\r
- if (list == NULL)\r
- return NULL;\r
- raw = type->tp_subclasses;\r
- if (raw == NULL)\r
- return list;\r
- assert(PyList_Check(raw));\r
- n = PyList_GET_SIZE(raw);\r
- for (i = 0; i < n; i++) {\r
- ref = PyList_GET_ITEM(raw, i);\r
- assert(PyWeakref_CheckRef(ref));\r
- ref = PyWeakref_GET_OBJECT(ref);\r
- if (ref != Py_None) {\r
- if (PyList_Append(list, ref) < 0) {\r
- Py_DECREF(list);\r
- return NULL;\r
- }\r
- }\r
- }\r
- return list;\r
-}\r
-\r
-static PyMethodDef type_methods[] = {\r
- {"mro", (PyCFunction)mro_external, METH_NOARGS,\r
- PyDoc_STR("mro() -> list\nreturn a type's method resolution order")},\r
- {"__subclasses__", (PyCFunction)type_subclasses, METH_NOARGS,\r
- PyDoc_STR("__subclasses__() -> list of immediate subclasses")},\r
- {"__instancecheck__", type___instancecheck__, METH_O,\r
- PyDoc_STR("__instancecheck__() -> bool\ncheck if an object is an instance")},\r
- {"__subclasscheck__", type___subclasscheck__, METH_O,\r
- PyDoc_STR("__subclasscheck__() -> bool\ncheck if a class is a subclass")},\r
- {0}\r
-};\r
-\r
-PyDoc_STRVAR(type_doc,\r
-"type(object) -> the object's type\n"\r
-"type(name, bases, dict) -> a new type");\r
-\r
-static int\r
-type_traverse(PyTypeObject *type, visitproc visit, void *arg)\r
-{\r
- /* Because of type_is_gc(), the collector only calls this\r
- for heaptypes. */\r
- assert(type->tp_flags & Py_TPFLAGS_HEAPTYPE);\r
-\r
- Py_VISIT(type->tp_dict);\r
- Py_VISIT(type->tp_cache);\r
- Py_VISIT(type->tp_mro);\r
- Py_VISIT(type->tp_bases);\r
- Py_VISIT(type->tp_base);\r
-\r
- /* There's no need to visit type->tp_subclasses or\r
- ((PyHeapTypeObject *)type)->ht_slots, because they can't be involved\r
- in cycles; tp_subclasses is a list of weak references,\r
- and slots is a tuple of strings. */\r
-\r
- return 0;\r
-}\r
-\r
-static int\r
-type_clear(PyTypeObject *type)\r
-{\r
- /* Because of type_is_gc(), the collector only calls this\r
- for heaptypes. */\r
- assert(type->tp_flags & Py_TPFLAGS_HEAPTYPE);\r
-\r
- /* We need to invalidate the method cache carefully before clearing\r
- the dict, so that other objects caught in a reference cycle\r
- don't start calling destroyed methods.\r
-\r
- Otherwise, the only field we need to clear is tp_mro, which is\r
- part of a hard cycle (its first element is the class itself) that\r
- won't be broken otherwise (it's a tuple and tuples don't have a\r
- tp_clear handler). None of the other fields need to be\r
- cleared, and here's why:\r
-\r
- tp_cache:\r
- Not used; if it were, it would be a dict.\r
-\r
- tp_bases, tp_base:\r
- If these are involved in a cycle, there must be at least\r
- one other, mutable object in the cycle, e.g. a base\r
- class's dict; the cycle will be broken that way.\r
-\r
- tp_subclasses:\r
- A list of weak references can't be part of a cycle; and\r
- lists have their own tp_clear.\r
-\r
- slots (in PyHeapTypeObject):\r
- A tuple of strings can't be part of a cycle.\r
- */\r
-\r
- PyType_Modified(type);\r
- if (type->tp_dict)\r
- PyDict_Clear(type->tp_dict);\r
- Py_CLEAR(type->tp_mro);\r
-\r
- return 0;\r
-}\r
-\r
-static int\r
-type_is_gc(PyTypeObject *type)\r
-{\r
- return type->tp_flags & Py_TPFLAGS_HEAPTYPE;\r
-}\r
-\r
-PyTypeObject PyType_Type = {\r
- PyVarObject_HEAD_INIT(&PyType_Type, 0)\r
- "type", /* tp_name */\r
- sizeof(PyHeapTypeObject), /* tp_basicsize */\r
- sizeof(PyMemberDef), /* tp_itemsize */\r
- (destructor)type_dealloc, /* tp_dealloc */\r
- 0, /* tp_print */\r
- 0, /* tp_getattr */\r
- 0, /* tp_setattr */\r
- 0, /* tp_compare */\r
- (reprfunc)type_repr, /* tp_repr */\r
- 0, /* tp_as_number */\r
- 0, /* tp_as_sequence */\r
- 0, /* tp_as_mapping */\r
- (hashfunc)_Py_HashPointer, /* tp_hash */\r
- (ternaryfunc)type_call, /* tp_call */\r
- 0, /* tp_str */\r
- (getattrofunc)type_getattro, /* tp_getattro */\r
- (setattrofunc)type_setattro, /* tp_setattro */\r
- 0, /* tp_as_buffer */\r
- Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |\r
- Py_TPFLAGS_BASETYPE | Py_TPFLAGS_TYPE_SUBCLASS, /* tp_flags */\r
- type_doc, /* tp_doc */\r
- (traverseproc)type_traverse, /* tp_traverse */\r
- (inquiry)type_clear, /* tp_clear */\r
- type_richcompare, /* tp_richcompare */\r
- offsetof(PyTypeObject, tp_weaklist), /* tp_weaklistoffset */\r
- 0, /* tp_iter */\r
- 0, /* tp_iternext */\r
- type_methods, /* tp_methods */\r
- type_members, /* tp_members */\r
- type_getsets, /* tp_getset */\r
- 0, /* tp_base */\r
- 0, /* tp_dict */\r
- 0, /* tp_descr_get */\r
- 0, /* tp_descr_set */\r
- offsetof(PyTypeObject, tp_dict), /* tp_dictoffset */\r
- type_init, /* tp_init */\r
- 0, /* tp_alloc */\r
- type_new, /* tp_new */\r
- PyObject_GC_Del, /* tp_free */\r
- (inquiry)type_is_gc, /* tp_is_gc */\r
-};\r
-\r
-\r
-/* The base type of all types (eventually)... except itself. */\r
-\r
-/* You may wonder why object.__new__() only complains about arguments\r
- when object.__init__() is not overridden, and vice versa.\r
-\r
- Consider the use cases:\r
-\r
- 1. When neither is overridden, we want to hear complaints about\r
- excess (i.e., any) arguments, since their presence could\r
- indicate there's a bug.\r
-\r
- 2. When defining an Immutable type, we are likely to override only\r
- __new__(), since __init__() is called too late to initialize an\r
- Immutable object. Since __new__() defines the signature for the\r
- type, it would be a pain to have to override __init__() just to\r
- stop it from complaining about excess arguments.\r
-\r
- 3. When defining a Mutable type, we are likely to override only\r
- __init__(). So here the converse reasoning applies: we don't\r
- want to have to override __new__() just to stop it from\r
- complaining.\r
-\r
- 4. When __init__() is overridden, and the subclass __init__() calls\r
- object.__init__(), the latter should complain about excess\r
- arguments; ditto for __new__().\r
-\r
- Use cases 2 and 3 make it unattractive to unconditionally check for\r
- excess arguments. The best solution that addresses all four use\r
- cases is as follows: __init__() complains about excess arguments\r
- unless __new__() is overridden and __init__() is not overridden\r
- (IOW, if __init__() is overridden or __new__() is not overridden);\r
- symmetrically, __new__() complains about excess arguments unless\r
- __init__() is overridden and __new__() is not overridden\r
- (IOW, if __new__() is overridden or __init__() is not overridden).\r
-\r
- However, for backwards compatibility, this breaks too much code.\r
- Therefore, in 2.6, we'll *warn* about excess arguments when both\r
- methods are overridden; for all other cases we'll use the above\r
- rules.\r
-\r
-*/\r
-\r
-/* Forward */\r
-static PyObject *\r
-object_new(PyTypeObject *type, PyObject *args, PyObject *kwds);\r
-\r
-static int\r
-excess_args(PyObject *args, PyObject *kwds)\r
-{\r
- return PyTuple_GET_SIZE(args) ||\r
- (kwds && PyDict_Check(kwds) && PyDict_Size(kwds));\r
-}\r
-\r
-static int\r
-object_init(PyObject *self, PyObject *args, PyObject *kwds)\r
-{\r
- int err = 0;\r
- if (excess_args(args, kwds)) {\r
- PyTypeObject *type = Py_TYPE(self);\r
- if (type->tp_init != object_init &&\r
- type->tp_new != object_new)\r
- {\r
- err = PyErr_WarnEx(PyExc_DeprecationWarning,\r
- "object.__init__() takes no parameters",\r
- 1);\r
- }\r
- else if (type->tp_init != object_init ||\r
- type->tp_new == object_new)\r
- {\r
- PyErr_SetString(PyExc_TypeError,\r
- "object.__init__() takes no parameters");\r
- err = -1;\r
- }\r
- }\r
- return err;\r
-}\r
-\r
-static PyObject *\r
-object_new(PyTypeObject *type, PyObject *args, PyObject *kwds)\r
-{\r
- int err = 0;\r
- if (excess_args(args, kwds)) {\r
- if (type->tp_new != object_new &&\r
- type->tp_init != object_init)\r
- {\r
- err = PyErr_WarnEx(PyExc_DeprecationWarning,\r
- "object() takes no parameters",\r
- 1);\r
- }\r
- else if (type->tp_new != object_new ||\r
- type->tp_init == object_init)\r
- {\r
- PyErr_SetString(PyExc_TypeError,\r
- "object() takes no parameters");\r
- err = -1;\r
- }\r
- }\r
- if (err < 0)\r
- return NULL;\r
-\r
- if (type->tp_flags & Py_TPFLAGS_IS_ABSTRACT) {\r
- static PyObject *comma = NULL;\r
- PyObject *abstract_methods = NULL;\r
- PyObject *builtins;\r
- PyObject *sorted;\r
- PyObject *sorted_methods = NULL;\r
- PyObject *joined = NULL;\r
- const char *joined_str;\r
-\r
- /* Compute ", ".join(sorted(type.__abstractmethods__))\r
- into joined. */\r
- abstract_methods = type_abstractmethods(type, NULL);\r
- if (abstract_methods == NULL)\r
- goto error;\r
- builtins = PyEval_GetBuiltins();\r
- if (builtins == NULL)\r
- goto error;\r
- sorted = PyDict_GetItemString(builtins, "sorted");\r
- if (sorted == NULL)\r
- goto error;\r
- sorted_methods = PyObject_CallFunctionObjArgs(sorted,\r
- abstract_methods,\r
- NULL);\r
- if (sorted_methods == NULL)\r
- goto error;\r
- if (comma == NULL) {\r
- comma = PyString_InternFromString(", ");\r
- if (comma == NULL)\r
- goto error;\r
- }\r
- joined = PyObject_CallMethod(comma, "join",\r
- "O", sorted_methods);\r
- if (joined == NULL)\r
- goto error;\r
- joined_str = PyString_AsString(joined);\r
- if (joined_str == NULL)\r
- goto error;\r
-\r
- PyErr_Format(PyExc_TypeError,\r
- "Can't instantiate abstract class %s "\r
- "with abstract methods %s",\r
- type->tp_name,\r
- joined_str);\r
- error:\r
- Py_XDECREF(joined);\r
- Py_XDECREF(sorted_methods);\r
- Py_XDECREF(abstract_methods);\r
- return NULL;\r
- }\r
- return type->tp_alloc(type, 0);\r
-}\r
-\r
-static void\r
-object_dealloc(PyObject *self)\r
-{\r
- Py_TYPE(self)->tp_free(self);\r
-}\r
-\r
-static PyObject *\r
-object_repr(PyObject *self)\r
-{\r
- PyTypeObject *type;\r
- PyObject *mod, *name, *rtn;\r
-\r
- type = Py_TYPE(self);\r
- mod = type_module(type, NULL);\r
- if (mod == NULL)\r
- PyErr_Clear();\r
- else if (!PyString_Check(mod)) {\r
- Py_DECREF(mod);\r
- mod = NULL;\r
- }\r
- name = type_name(type, NULL);\r
- if (name == NULL) {\r
- Py_XDECREF(mod);\r
- return NULL;\r
- }\r
- if (mod != NULL && strcmp(PyString_AS_STRING(mod), "__builtin__"))\r
- rtn = PyString_FromFormat("<%s.%s object at %p>",\r
- PyString_AS_STRING(mod),\r
- PyString_AS_STRING(name),\r
- self);\r
- else\r
- rtn = PyString_FromFormat("<%s object at %p>",\r
- type->tp_name, self);\r
- Py_XDECREF(mod);\r
- Py_DECREF(name);\r
- return rtn;\r
-}\r
-\r
-static PyObject *\r
-object_str(PyObject *self)\r
-{\r
- unaryfunc f;\r
-\r
- f = Py_TYPE(self)->tp_repr;\r
- if (f == NULL)\r
- f = object_repr;\r
- return f(self);\r
-}\r
-\r
-static PyObject *\r
-object_get_class(PyObject *self, void *closure)\r
-{\r
- Py_INCREF(Py_TYPE(self));\r
- return (PyObject *)(Py_TYPE(self));\r
-}\r
-\r
-static int\r
-equiv_structs(PyTypeObject *a, PyTypeObject *b)\r
-{\r
- return a == b ||\r
- (a != NULL &&\r
- b != NULL &&\r
- a->tp_basicsize == b->tp_basicsize &&\r
- a->tp_itemsize == b->tp_itemsize &&\r
- a->tp_dictoffset == b->tp_dictoffset &&\r
- a->tp_weaklistoffset == b->tp_weaklistoffset &&\r
- ((a->tp_flags & Py_TPFLAGS_HAVE_GC) ==\r
- (b->tp_flags & Py_TPFLAGS_HAVE_GC)));\r
-}\r
-\r
-static int\r
-same_slots_added(PyTypeObject *a, PyTypeObject *b)\r
-{\r
- PyTypeObject *base = a->tp_base;\r
- Py_ssize_t size;\r
- PyObject *slots_a, *slots_b;\r
-\r
- assert(base == b->tp_base);\r
- size = base->tp_basicsize;\r
- if (a->tp_dictoffset == size && b->tp_dictoffset == size)\r
- size += sizeof(PyObject *);\r
- if (a->tp_weaklistoffset == size && b->tp_weaklistoffset == size)\r
- size += sizeof(PyObject *);\r
-\r
- /* Check slots compliance */\r
- slots_a = ((PyHeapTypeObject *)a)->ht_slots;\r
- slots_b = ((PyHeapTypeObject *)b)->ht_slots;\r
- if (slots_a && slots_b) {\r
- if (PyObject_Compare(slots_a, slots_b) != 0)\r
- return 0;\r
- size += sizeof(PyObject *) * PyTuple_GET_SIZE(slots_a);\r
- }\r
- return size == a->tp_basicsize && size == b->tp_basicsize;\r
-}\r
-\r
-static int\r
-compatible_for_assignment(PyTypeObject* oldto, PyTypeObject* newto, char* attr)\r
-{\r
- PyTypeObject *newbase, *oldbase;\r
-\r
- if (newto->tp_dealloc != oldto->tp_dealloc ||\r
- newto->tp_free != oldto->tp_free)\r
- {\r
- PyErr_Format(PyExc_TypeError,\r
- "%s assignment: "\r
- "'%s' deallocator differs from '%s'",\r
- attr,\r
- newto->tp_name,\r
- oldto->tp_name);\r
- return 0;\r
- }\r
- newbase = newto;\r
- oldbase = oldto;\r
- while (equiv_structs(newbase, newbase->tp_base))\r
- newbase = newbase->tp_base;\r
- while (equiv_structs(oldbase, oldbase->tp_base))\r
- oldbase = oldbase->tp_base;\r
- if (newbase != oldbase &&\r
- (newbase->tp_base != oldbase->tp_base ||\r
- !same_slots_added(newbase, oldbase))) {\r
- PyErr_Format(PyExc_TypeError,\r
- "%s assignment: "\r
- "'%s' object layout differs from '%s'",\r
- attr,\r
- newto->tp_name,\r
- oldto->tp_name);\r
- return 0;\r
- }\r
-\r
- return 1;\r
-}\r
-\r
-static int\r
-object_set_class(PyObject *self, PyObject *value, void *closure)\r
-{\r
- PyTypeObject *oldto = Py_TYPE(self);\r
- PyTypeObject *newto;\r
-\r
- if (value == NULL) {\r
- PyErr_SetString(PyExc_TypeError,\r
- "can't delete __class__ attribute");\r
- return -1;\r
- }\r
- if (!PyType_Check(value)) {\r
- PyErr_Format(PyExc_TypeError,\r
- "__class__ must be set to new-style class, not '%s' object",\r
- Py_TYPE(value)->tp_name);\r
- return -1;\r
- }\r
- newto = (PyTypeObject *)value;\r
- if (!(newto->tp_flags & Py_TPFLAGS_HEAPTYPE) ||\r
- !(oldto->tp_flags & Py_TPFLAGS_HEAPTYPE))\r
- {\r
- PyErr_Format(PyExc_TypeError,\r
- "__class__ assignment: only for heap types");\r
- return -1;\r
- }\r
- if (compatible_for_assignment(newto, oldto, "__class__")) {\r
- Py_INCREF(newto);\r
- Py_TYPE(self) = newto;\r
- Py_DECREF(oldto);\r
- return 0;\r
- }\r
- else {\r
- return -1;\r
- }\r
-}\r
-\r
-static PyGetSetDef object_getsets[] = {\r
- {"__class__", object_get_class, object_set_class,\r
- PyDoc_STR("the object's class")},\r
- {0}\r
-};\r
-\r
-\r
-/* Stuff to implement __reduce_ex__ for pickle protocols >= 2.\r
- We fall back to helpers in copy_reg for:\r
- - pickle protocols < 2\r
- - calculating the list of slot names (done only once per class)\r
- - the __newobj__ function (which is used as a token but never called)\r
-*/\r
-\r
-static PyObject *\r
-import_copyreg(void)\r
-{\r
- static PyObject *copyreg_str;\r
-\r
- if (!copyreg_str) {\r
- copyreg_str = PyString_InternFromString("copy_reg");\r
- if (copyreg_str == NULL)\r
- return NULL;\r
- }\r
-\r
- return PyImport_Import(copyreg_str);\r
-}\r
-\r
-static PyObject *\r
-slotnames(PyObject *cls)\r
-{\r
- PyObject *clsdict;\r
- PyObject *copyreg;\r
- PyObject *slotnames;\r
-\r
- if (!PyType_Check(cls)) {\r
- Py_INCREF(Py_None);\r
- return Py_None;\r
- }\r
-\r
- clsdict = ((PyTypeObject *)cls)->tp_dict;\r
- slotnames = PyDict_GetItemString(clsdict, "__slotnames__");\r
- if (slotnames != NULL && PyList_Check(slotnames)) {\r
- Py_INCREF(slotnames);\r
- return slotnames;\r
- }\r
-\r
- copyreg = import_copyreg();\r
- if (copyreg == NULL)\r
- return NULL;\r
-\r
- slotnames = PyObject_CallMethod(copyreg, "_slotnames", "O", cls);\r
- Py_DECREF(copyreg);\r
- if (slotnames != NULL &&\r
- slotnames != Py_None &&\r
- !PyList_Check(slotnames))\r
- {\r
- PyErr_SetString(PyExc_TypeError,\r
- "copy_reg._slotnames didn't return a list or None");\r
- Py_DECREF(slotnames);\r
- slotnames = NULL;\r
- }\r
-\r
- return slotnames;\r
-}\r
-\r
-static PyObject *\r
-reduce_2(PyObject *obj)\r
-{\r
- PyObject *cls, *getnewargs;\r
- PyObject *args = NULL, *args2 = NULL;\r
- PyObject *getstate = NULL, *state = NULL, *names = NULL;\r
- PyObject *slots = NULL, *listitems = NULL, *dictitems = NULL;\r
- PyObject *copyreg = NULL, *newobj = NULL, *res = NULL;\r
- Py_ssize_t i, n;\r
-\r
- cls = PyObject_GetAttrString(obj, "__class__");\r
- if (cls == NULL)\r
- return NULL;\r
-\r
- getnewargs = PyObject_GetAttrString(obj, "__getnewargs__");\r
- if (getnewargs != NULL) {\r
- args = PyObject_CallObject(getnewargs, NULL);\r
- Py_DECREF(getnewargs);\r
- if (args != NULL && !PyTuple_Check(args)) {\r
- PyErr_Format(PyExc_TypeError,\r
- "__getnewargs__ should return a tuple, "\r
- "not '%.200s'", Py_TYPE(args)->tp_name);\r
- goto end;\r
- }\r
- }\r
- else {\r
- PyErr_Clear();\r
- args = PyTuple_New(0);\r
- }\r
- if (args == NULL)\r
- goto end;\r
-\r
- getstate = PyObject_GetAttrString(obj, "__getstate__");\r
- if (getstate != NULL) {\r
- state = PyObject_CallObject(getstate, NULL);\r
- Py_DECREF(getstate);\r
- if (state == NULL)\r
- goto end;\r
- }\r
- else {\r
- PyErr_Clear();\r
- state = PyObject_GetAttrString(obj, "__dict__");\r
- if (state == NULL) {\r
- PyErr_Clear();\r
- state = Py_None;\r
- Py_INCREF(state);\r
- }\r
- names = slotnames(cls);\r
- if (names == NULL)\r
- goto end;\r
- if (names != Py_None) {\r
- assert(PyList_Check(names));\r
- slots = PyDict_New();\r
- if (slots == NULL)\r
- goto end;\r
- n = 0;\r
- /* Can't pre-compute the list size; the list\r
- is stored on the class so accessible to other\r
- threads, which may be run by DECREF */\r
- for (i = 0; i < PyList_GET_SIZE(names); i++) {\r
- PyObject *name, *value;\r
- name = PyList_GET_ITEM(names, i);\r
- value = PyObject_GetAttr(obj, name);\r
- if (value == NULL)\r
- PyErr_Clear();\r
- else {\r
- int err = PyDict_SetItem(slots, name,\r
- value);\r
- Py_DECREF(value);\r
- if (err)\r
- goto end;\r
- n++;\r
- }\r
- }\r
- if (n) {\r
- state = Py_BuildValue("(NO)", state, slots);\r
- if (state == NULL)\r
- goto end;\r
- }\r
- }\r
- }\r
-\r
- if (!PyList_Check(obj)) {\r
- listitems = Py_None;\r
- Py_INCREF(listitems);\r
- }\r
- else {\r
- listitems = PyObject_GetIter(obj);\r
- if (listitems == NULL)\r
- goto end;\r
- }\r
-\r
- if (!PyDict_Check(obj)) {\r
- dictitems = Py_None;\r
- Py_INCREF(dictitems);\r
- }\r
- else {\r
- dictitems = PyObject_CallMethod(obj, "iteritems", "");\r
- if (dictitems == NULL)\r
- goto end;\r
- }\r
-\r
- copyreg = import_copyreg();\r
- if (copyreg == NULL)\r
- goto end;\r
- newobj = PyObject_GetAttrString(copyreg, "__newobj__");\r
- if (newobj == NULL)\r
- goto end;\r
-\r
- n = PyTuple_GET_SIZE(args);\r
- args2 = PyTuple_New(n+1);\r
- if (args2 == NULL)\r
- goto end;\r
- PyTuple_SET_ITEM(args2, 0, cls);\r
- cls = NULL;\r
- for (i = 0; i < n; i++) {\r
- PyObject *v = PyTuple_GET_ITEM(args, i);\r
- Py_INCREF(v);\r
- PyTuple_SET_ITEM(args2, i+1, v);\r
- }\r
-\r
- res = PyTuple_Pack(5, newobj, args2, state, listitems, dictitems);\r
-\r
- end:\r
- Py_XDECREF(cls);\r
- Py_XDECREF(args);\r
- Py_XDECREF(args2);\r
- Py_XDECREF(slots);\r
- Py_XDECREF(state);\r
- Py_XDECREF(names);\r
- Py_XDECREF(listitems);\r
- Py_XDECREF(dictitems);\r
- Py_XDECREF(copyreg);\r
- Py_XDECREF(newobj);\r
- return res;\r
-}\r
-\r
-/*\r
- * There were two problems when object.__reduce__ and object.__reduce_ex__\r
- * were implemented in the same function:\r
- * - trying to pickle an object with a custom __reduce__ method that\r
- * fell back to object.__reduce__ in certain circumstances led to\r
- * infinite recursion at Python level and eventual RuntimeError.\r
- * - Pickling objects that lied about their type by overwriting the\r
- * __class__ descriptor could lead to infinite recursion at C level\r
- * and eventual segfault.\r
- *\r
- * Because of backwards compatibility, the two methods still have to\r
- * behave in the same way, even if this is not required by the pickle\r
- * protocol. This common functionality was moved to the _common_reduce\r
- * function.\r
- */\r
-static PyObject *\r
-_common_reduce(PyObject *self, int proto)\r
-{\r
- PyObject *copyreg, *res;\r
-\r
- if (proto >= 2)\r
- return reduce_2(self);\r
-\r
- copyreg = import_copyreg();\r
- if (!copyreg)\r
- return NULL;\r
-\r
- res = PyEval_CallMethod(copyreg, "_reduce_ex", "(Oi)", self, proto);\r
- Py_DECREF(copyreg);\r
-\r
- return res;\r
-}\r
-\r
-static PyObject *\r
-object_reduce(PyObject *self, PyObject *args)\r
-{\r
- int proto = 0;\r
-\r
- if (!PyArg_ParseTuple(args, "|i:__reduce__", &proto))\r
- return NULL;\r
-\r
- return _common_reduce(self, proto);\r
-}\r
-\r
-static PyObject *\r
-object_reduce_ex(PyObject *self, PyObject *args)\r
-{\r
- PyObject *reduce, *res;\r
- int proto = 0;\r
-\r
- if (!PyArg_ParseTuple(args, "|i:__reduce_ex__", &proto))\r
- return NULL;\r
-\r
- reduce = PyObject_GetAttrString(self, "__reduce__");\r
- if (reduce == NULL)\r
- PyErr_Clear();\r
- else {\r
- PyObject *cls, *clsreduce, *objreduce;\r
- int override;\r
- cls = PyObject_GetAttrString(self, "__class__");\r
- if (cls == NULL) {\r
- Py_DECREF(reduce);\r
- return NULL;\r
- }\r
- clsreduce = PyObject_GetAttrString(cls, "__reduce__");\r
- Py_DECREF(cls);\r
- if (clsreduce == NULL) {\r
- Py_DECREF(reduce);\r
- return NULL;\r
- }\r
- objreduce = PyDict_GetItemString(PyBaseObject_Type.tp_dict,\r
- "__reduce__");\r
- override = (clsreduce != objreduce);\r
- Py_DECREF(clsreduce);\r
- if (override) {\r
- res = PyObject_CallObject(reduce, NULL);\r
- Py_DECREF(reduce);\r
- return res;\r
- }\r
- else\r
- Py_DECREF(reduce);\r
- }\r
-\r
- return _common_reduce(self, proto);\r
-}\r
-\r
-static PyObject *\r
-object_subclasshook(PyObject *cls, PyObject *args)\r
-{\r
- Py_INCREF(Py_NotImplemented);\r
- return Py_NotImplemented;\r
-}\r
-\r
-PyDoc_STRVAR(object_subclasshook_doc,\r
-"Abstract classes can override this to customize issubclass().\n"\r
-"\n"\r
-"This is invoked early on by abc.ABCMeta.__subclasscheck__().\n"\r
-"It should return True, False or NotImplemented. If it returns\n"\r
-"NotImplemented, the normal algorithm is used. Otherwise, it\n"\r
-"overrides the normal algorithm (and the outcome is cached).\n");\r
-\r
-/*\r
- from PEP 3101, this code implements:\r
-\r
- class object:\r
- def __format__(self, format_spec):\r
- if isinstance(format_spec, str):\r
- return format(str(self), format_spec)\r
- elif isinstance(format_spec, unicode):\r
- return format(unicode(self), format_spec)\r
-*/\r
-static PyObject *\r
-object_format(PyObject *self, PyObject *args)\r
-{\r
- PyObject *format_spec;\r
- PyObject *self_as_str = NULL;\r
- PyObject *result = NULL;\r
- Py_ssize_t format_len;\r
-\r
- if (!PyArg_ParseTuple(args, "O:__format__", &format_spec))\r
- return NULL;\r
-#ifdef Py_USING_UNICODE\r
- if (PyUnicode_Check(format_spec)) {\r
- format_len = PyUnicode_GET_SIZE(format_spec);\r
- self_as_str = PyObject_Unicode(self);\r
- } else if (PyString_Check(format_spec)) {\r
-#else\r
- if (PyString_Check(format_spec)) {\r
-#endif\r
- format_len = PyString_GET_SIZE(format_spec);\r
- self_as_str = PyObject_Str(self);\r
- } else {\r
- PyErr_SetString(PyExc_TypeError,\r
- "argument to __format__ must be unicode or str");\r
- return NULL;\r
- }\r
-\r
- if (self_as_str != NULL) {\r
- /* Issue 7994: If we're converting to a string, we\r
- should reject format specifications */\r
- if (format_len > 0) {\r
- if (PyErr_WarnEx(PyExc_PendingDeprecationWarning,\r
- "object.__format__ with a non-empty format "\r
- "string is deprecated", 1) < 0) {\r
- goto done;\r
- }\r
- /* Eventually this will become an error:\r
- PyErr_Format(PyExc_TypeError,\r
- "non-empty format string passed to object.__format__");\r
- goto done;\r
- */\r
- }\r
- result = PyObject_Format(self_as_str, format_spec);\r
- }\r
-\r
-done:\r
- Py_XDECREF(self_as_str);\r
-\r
- return result;\r
-}\r
-\r
-static PyObject *\r
-object_sizeof(PyObject *self, PyObject *args)\r
-{\r
- Py_ssize_t res, isize;\r
-\r
- res = 0;\r
- isize = self->ob_type->tp_itemsize;\r
- if (isize > 0)\r
- res = Py_SIZE(self) * isize;\r
- res += self->ob_type->tp_basicsize;\r
-\r
- return PyInt_FromSsize_t(res);\r
-}\r
-\r
-static PyMethodDef object_methods[] = {\r
- {"__reduce_ex__", object_reduce_ex, METH_VARARGS,\r
- PyDoc_STR("helper for pickle")},\r
- {"__reduce__", object_reduce, METH_VARARGS,\r
- PyDoc_STR("helper for pickle")},\r
- {"__subclasshook__", object_subclasshook, METH_CLASS | METH_VARARGS,\r
- object_subclasshook_doc},\r
- {"__format__", object_format, METH_VARARGS,\r
- PyDoc_STR("default object formatter")},\r
- {"__sizeof__", object_sizeof, METH_NOARGS,\r
- PyDoc_STR("__sizeof__() -> int\nsize of object in memory, in bytes")},\r
- {0}\r
-};\r
-\r
-\r
-PyTypeObject PyBaseObject_Type = {\r
- PyVarObject_HEAD_INIT(&PyType_Type, 0)\r
- "object", /* tp_name */\r
- sizeof(PyObject), /* tp_basicsize */\r
- 0, /* tp_itemsize */\r
- object_dealloc, /* tp_dealloc */\r
- 0, /* tp_print */\r
- 0, /* tp_getattr */\r
- 0, /* tp_setattr */\r
- 0, /* tp_compare */\r
- object_repr, /* tp_repr */\r
- 0, /* tp_as_number */\r
- 0, /* tp_as_sequence */\r
- 0, /* tp_as_mapping */\r
- (hashfunc)_Py_HashPointer, /* tp_hash */\r
- 0, /* tp_call */\r
- object_str, /* tp_str */\r
- PyObject_GenericGetAttr, /* tp_getattro */\r
- PyObject_GenericSetAttr, /* tp_setattro */\r
- 0, /* tp_as_buffer */\r
- Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */\r
- PyDoc_STR("The most base type"), /* tp_doc */\r
- 0, /* tp_traverse */\r
- 0, /* tp_clear */\r
- 0, /* tp_richcompare */\r
- 0, /* tp_weaklistoffset */\r
- 0, /* tp_iter */\r
- 0, /* tp_iternext */\r
- object_methods, /* tp_methods */\r
- 0, /* tp_members */\r
- object_getsets, /* tp_getset */\r
- 0, /* tp_base */\r
- 0, /* tp_dict */\r
- 0, /* tp_descr_get */\r
- 0, /* tp_descr_set */\r
- 0, /* tp_dictoffset */\r
- object_init, /* tp_init */\r
- PyType_GenericAlloc, /* tp_alloc */\r
- object_new, /* tp_new */\r
- PyObject_Del, /* tp_free */\r
-};\r
-\r
-\r
-/* Initialize the __dict__ in a type object */\r
-\r
-static int\r
-add_methods(PyTypeObject *type, PyMethodDef *meth)\r
-{\r
- PyObject *dict = type->tp_dict;\r
-\r
- for (; meth->ml_name != NULL; meth++) {\r
- PyObject *descr;\r
- int err;\r
- if (PyDict_GetItemString(dict, meth->ml_name) &&\r
- !(meth->ml_flags & METH_COEXIST))\r
- continue;\r
- if (meth->ml_flags & METH_CLASS) {\r
- if (meth->ml_flags & METH_STATIC) {\r
- PyErr_SetString(PyExc_ValueError,\r
- "method cannot be both class and static");\r
- return -1;\r
- }\r
- descr = PyDescr_NewClassMethod(type, meth);\r
- }\r
- else if (meth->ml_flags & METH_STATIC) {\r
- PyObject *cfunc = PyCFunction_New(meth, NULL);\r
- if (cfunc == NULL)\r
- return -1;\r
- descr = PyStaticMethod_New(cfunc);\r
- Py_DECREF(cfunc);\r
- }\r
- else {\r
- descr = PyDescr_NewMethod(type, meth);\r
- }\r
- if (descr == NULL)\r
- return -1;\r
- err = PyDict_SetItemString(dict, meth->ml_name, descr);\r
- Py_DECREF(descr);\r
- if (err < 0)\r
- return -1;\r
- }\r
- return 0;\r
-}\r
-\r
-static int\r
-add_members(PyTypeObject *type, PyMemberDef *memb)\r
-{\r
- PyObject *dict = type->tp_dict;\r
-\r
- for (; memb->name != NULL; memb++) {\r
- PyObject *descr;\r
- if (PyDict_GetItemString(dict, memb->name))\r
- continue;\r
- descr = PyDescr_NewMember(type, memb);\r
- if (descr == NULL)\r
- return -1;\r
- if (PyDict_SetItemString(dict, memb->name, descr) < 0)\r
- return -1;\r
- Py_DECREF(descr);\r
- }\r
- return 0;\r
-}\r
-\r
-static int\r
-add_getset(PyTypeObject *type, PyGetSetDef *gsp)\r
-{\r
- PyObject *dict = type->tp_dict;\r
-\r
- for (; gsp->name != NULL; gsp++) {\r
- PyObject *descr;\r
- if (PyDict_GetItemString(dict, gsp->name))\r
- continue;\r
- descr = PyDescr_NewGetSet(type, gsp);\r
-\r
- if (descr == NULL)\r
- return -1;\r
- if (PyDict_SetItemString(dict, gsp->name, descr) < 0)\r
- return -1;\r
- Py_DECREF(descr);\r
- }\r
- return 0;\r
-}\r
-\r
-#define BUFFER_FLAGS (Py_TPFLAGS_HAVE_GETCHARBUFFER | Py_TPFLAGS_HAVE_NEWBUFFER)\r
-\r
-static void\r
-inherit_special(PyTypeObject *type, PyTypeObject *base)\r
-{\r
- Py_ssize_t oldsize, newsize;\r
-\r
- /* Special flag magic */\r
- if (!type->tp_as_buffer && base->tp_as_buffer) {\r
- type->tp_flags &= ~BUFFER_FLAGS;\r
- type->tp_flags |=\r
- base->tp_flags & BUFFER_FLAGS;\r
- }\r
- if (!type->tp_as_sequence && base->tp_as_sequence) {\r
- type->tp_flags &= ~Py_TPFLAGS_HAVE_SEQUENCE_IN;\r
- type->tp_flags |= base->tp_flags & Py_TPFLAGS_HAVE_SEQUENCE_IN;\r
- }\r
- if ((type->tp_flags & Py_TPFLAGS_HAVE_INPLACEOPS) !=\r
- (base->tp_flags & Py_TPFLAGS_HAVE_INPLACEOPS)) {\r
- if ((!type->tp_as_number && base->tp_as_number) ||\r
- (!type->tp_as_sequence && base->tp_as_sequence)) {\r
- type->tp_flags &= ~Py_TPFLAGS_HAVE_INPLACEOPS;\r
- if (!type->tp_as_number && !type->tp_as_sequence) {\r
- type->tp_flags |= base->tp_flags &\r
- Py_TPFLAGS_HAVE_INPLACEOPS;\r
- }\r
- }\r
- /* Wow */\r
- }\r
- if (!type->tp_as_number && base->tp_as_number) {\r
- type->tp_flags &= ~Py_TPFLAGS_CHECKTYPES;\r
- type->tp_flags |= base->tp_flags & Py_TPFLAGS_CHECKTYPES;\r
- }\r
-\r
- /* Copying basicsize is connected to the GC flags */\r
- oldsize = base->tp_basicsize;\r
- newsize = type->tp_basicsize ? type->tp_basicsize : oldsize;\r
- if (!(type->tp_flags & Py_TPFLAGS_HAVE_GC) &&\r
- (base->tp_flags & Py_TPFLAGS_HAVE_GC) &&\r
- (type->tp_flags & Py_TPFLAGS_HAVE_RICHCOMPARE/*GC slots exist*/) &&\r
- (!type->tp_traverse && !type->tp_clear)) {\r
- type->tp_flags |= Py_TPFLAGS_HAVE_GC;\r
- if (type->tp_traverse == NULL)\r
- type->tp_traverse = base->tp_traverse;\r
- if (type->tp_clear == NULL)\r
- type->tp_clear = base->tp_clear;\r
- }\r
- if (type->tp_flags & base->tp_flags & Py_TPFLAGS_HAVE_CLASS) {\r
- /* The condition below could use some explanation.\r
- It appears that tp_new is not inherited for static types\r
- whose base class is 'object'; this seems to be a precaution\r
- so that old extension types don't suddenly become\r
- callable (object.__new__ wouldn't insure the invariants\r
- that the extension type's own factory function ensures).\r
- Heap types, of course, are under our control, so they do\r
- inherit tp_new; static extension types that specify some\r
- other built-in type as the default are considered\r
- new-style-aware so they also inherit object.__new__. */\r
- if (base != &PyBaseObject_Type ||\r
- (type->tp_flags & Py_TPFLAGS_HEAPTYPE)) {\r
- if (type->tp_new == NULL)\r
- type->tp_new = base->tp_new;\r
- }\r
- }\r
- type->tp_basicsize = newsize;\r
-\r
- /* Copy other non-function slots */\r
-\r
-#undef COPYVAL\r
-#define COPYVAL(SLOT) \\r
- if (type->SLOT == 0) type->SLOT = base->SLOT\r
-\r
- COPYVAL(tp_itemsize);\r
- if (type->tp_flags & base->tp_flags & Py_TPFLAGS_HAVE_WEAKREFS) {\r
- COPYVAL(tp_weaklistoffset);\r
- }\r
- if (type->tp_flags & base->tp_flags & Py_TPFLAGS_HAVE_CLASS) {\r
- COPYVAL(tp_dictoffset);\r
- }\r
-\r
- /* Setup fast subclass flags */\r
- if (PyType_IsSubtype(base, (PyTypeObject*)PyExc_BaseException))\r
- type->tp_flags |= Py_TPFLAGS_BASE_EXC_SUBCLASS;\r
- else if (PyType_IsSubtype(base, &PyType_Type))\r
- type->tp_flags |= Py_TPFLAGS_TYPE_SUBCLASS;\r
- else if (PyType_IsSubtype(base, &PyInt_Type))\r
- type->tp_flags |= Py_TPFLAGS_INT_SUBCLASS;\r
- else if (PyType_IsSubtype(base, &PyLong_Type))\r
- type->tp_flags |= Py_TPFLAGS_LONG_SUBCLASS;\r
- else if (PyType_IsSubtype(base, &PyString_Type))\r
- type->tp_flags |= Py_TPFLAGS_STRING_SUBCLASS;\r
-#ifdef Py_USING_UNICODE\r
- else if (PyType_IsSubtype(base, &PyUnicode_Type))\r
- type->tp_flags |= Py_TPFLAGS_UNICODE_SUBCLASS;\r
-#endif\r
- else if (PyType_IsSubtype(base, &PyTuple_Type))\r
- type->tp_flags |= Py_TPFLAGS_TUPLE_SUBCLASS;\r
- else if (PyType_IsSubtype(base, &PyList_Type))\r
- type->tp_flags |= Py_TPFLAGS_LIST_SUBCLASS;\r
- else if (PyType_IsSubtype(base, &PyDict_Type))\r
- type->tp_flags |= Py_TPFLAGS_DICT_SUBCLASS;\r
-}\r
-\r
-static int\r
-overrides_name(PyTypeObject *type, char *name)\r
-{\r
- PyObject *dict = type->tp_dict;\r
-\r
- assert(dict != NULL);\r
- if (PyDict_GetItemString(dict, name) != NULL) {\r
- return 1;\r
- }\r
- return 0;\r
-}\r
-\r
-#define OVERRIDES_HASH(x) overrides_name(x, "__hash__")\r
-#define OVERRIDES_EQ(x) overrides_name(x, "__eq__")\r
-\r
-static void\r
-inherit_slots(PyTypeObject *type, PyTypeObject *base)\r
-{\r
- PyTypeObject *basebase;\r
-\r
-#undef SLOTDEFINED\r
-#undef COPYSLOT\r
-#undef COPYNUM\r
-#undef COPYSEQ\r
-#undef COPYMAP\r
-#undef COPYBUF\r
-\r
-#define SLOTDEFINED(SLOT) \\r
- (base->SLOT != 0 && \\r
- (basebase == NULL || base->SLOT != basebase->SLOT))\r
-\r
-#define COPYSLOT(SLOT) \\r
- if (!type->SLOT && SLOTDEFINED(SLOT)) type->SLOT = base->SLOT\r
-\r
-#define COPYNUM(SLOT) COPYSLOT(tp_as_number->SLOT)\r
-#define COPYSEQ(SLOT) COPYSLOT(tp_as_sequence->SLOT)\r
-#define COPYMAP(SLOT) COPYSLOT(tp_as_mapping->SLOT)\r
-#define COPYBUF(SLOT) COPYSLOT(tp_as_buffer->SLOT)\r
-\r
- /* This won't inherit indirect slots (from tp_as_number etc.)\r
- if type doesn't provide the space. */\r
-\r
- if (type->tp_as_number != NULL && base->tp_as_number != NULL) {\r
- basebase = base->tp_base;\r
- if (basebase->tp_as_number == NULL)\r
- basebase = NULL;\r
- COPYNUM(nb_add);\r
- COPYNUM(nb_subtract);\r
- COPYNUM(nb_multiply);\r
- COPYNUM(nb_divide);\r
- COPYNUM(nb_remainder);\r
- COPYNUM(nb_divmod);\r
- COPYNUM(nb_power);\r
- COPYNUM(nb_negative);\r
- COPYNUM(nb_positive);\r
- COPYNUM(nb_absolute);\r
- COPYNUM(nb_nonzero);\r
- COPYNUM(nb_invert);\r
- COPYNUM(nb_lshift);\r
- COPYNUM(nb_rshift);\r
- COPYNUM(nb_and);\r
- COPYNUM(nb_xor);\r
- COPYNUM(nb_or);\r
- COPYNUM(nb_coerce);\r
- COPYNUM(nb_int);\r
- COPYNUM(nb_long);\r
- COPYNUM(nb_float);\r
- COPYNUM(nb_oct);\r
- COPYNUM(nb_hex);\r
- COPYNUM(nb_inplace_add);\r
- COPYNUM(nb_inplace_subtract);\r
- COPYNUM(nb_inplace_multiply);\r
- COPYNUM(nb_inplace_divide);\r
- COPYNUM(nb_inplace_remainder);\r
- COPYNUM(nb_inplace_power);\r
- COPYNUM(nb_inplace_lshift);\r
- COPYNUM(nb_inplace_rshift);\r
- COPYNUM(nb_inplace_and);\r
- COPYNUM(nb_inplace_xor);\r
- COPYNUM(nb_inplace_or);\r
- if (base->tp_flags & Py_TPFLAGS_CHECKTYPES) {\r
- COPYNUM(nb_true_divide);\r
- COPYNUM(nb_floor_divide);\r
- COPYNUM(nb_inplace_true_divide);\r
- COPYNUM(nb_inplace_floor_divide);\r
- }\r
- if (base->tp_flags & Py_TPFLAGS_HAVE_INDEX) {\r
- COPYNUM(nb_index);\r
- }\r
- }\r
-\r
- if (type->tp_as_sequence != NULL && base->tp_as_sequence != NULL) {\r
- basebase = base->tp_base;\r
- if (basebase->tp_as_sequence == NULL)\r
- basebase = NULL;\r
- COPYSEQ(sq_length);\r
- COPYSEQ(sq_concat);\r
- COPYSEQ(sq_repeat);\r
- COPYSEQ(sq_item);\r
- COPYSEQ(sq_slice);\r
- COPYSEQ(sq_ass_item);\r
- COPYSEQ(sq_ass_slice);\r
- COPYSEQ(sq_contains);\r
- COPYSEQ(sq_inplace_concat);\r
- COPYSEQ(sq_inplace_repeat);\r
- }\r
-\r
- if (type->tp_as_mapping != NULL && base->tp_as_mapping != NULL) {\r
- basebase = base->tp_base;\r
- if (basebase->tp_as_mapping == NULL)\r
- basebase = NULL;\r
- COPYMAP(mp_length);\r
- COPYMAP(mp_subscript);\r
- COPYMAP(mp_ass_subscript);\r
- }\r
-\r
- if (type->tp_as_buffer != NULL && base->tp_as_buffer != NULL) {\r
- basebase = base->tp_base;\r
- if (basebase->tp_as_buffer == NULL)\r
- basebase = NULL;\r
- COPYBUF(bf_getreadbuffer);\r
- COPYBUF(bf_getwritebuffer);\r
- COPYBUF(bf_getsegcount);\r
- COPYBUF(bf_getcharbuffer);\r
- COPYBUF(bf_getbuffer);\r
- COPYBUF(bf_releasebuffer);\r
- }\r
-\r
- basebase = base->tp_base;\r
-\r
- COPYSLOT(tp_dealloc);\r
- COPYSLOT(tp_print);\r
- if (type->tp_getattr == NULL && type->tp_getattro == NULL) {\r
- type->tp_getattr = base->tp_getattr;\r
- type->tp_getattro = base->tp_getattro;\r
- }\r
- if (type->tp_setattr == NULL && type->tp_setattro == NULL) {\r
- type->tp_setattr = base->tp_setattr;\r
- type->tp_setattro = base->tp_setattro;\r
- }\r
- /* tp_compare see tp_richcompare */\r
- COPYSLOT(tp_repr);\r
- /* tp_hash see tp_richcompare */\r
- COPYSLOT(tp_call);\r
- COPYSLOT(tp_str);\r
- if (type->tp_flags & base->tp_flags & Py_TPFLAGS_HAVE_RICHCOMPARE) {\r
- if (type->tp_compare == NULL &&\r
- type->tp_richcompare == NULL &&\r
- type->tp_hash == NULL)\r
- {\r
- type->tp_compare = base->tp_compare;\r
- type->tp_richcompare = base->tp_richcompare;\r
- type->tp_hash = base->tp_hash;\r
- /* Check for changes to inherited methods in Py3k*/\r
- if (Py_Py3kWarningFlag) {\r
- if (base->tp_hash &&\r
- (base->tp_hash != PyObject_HashNotImplemented) &&\r
- !OVERRIDES_HASH(type)) {\r
- if (OVERRIDES_EQ(type)) {\r
- if (PyErr_WarnPy3k("Overriding "\r
- "__eq__ blocks inheritance "\r
- "of __hash__ in 3.x",\r
- 1) < 0)\r
- /* XXX This isn't right. If the warning is turned\r
- into an exception, we should be communicating\r
- the error back to the caller, but figuring out\r
- how to clean up in that case is tricky. See\r
- issue 8627 for more. */\r
- PyErr_Clear();\r
- }\r
- }\r
- }\r
- }\r
- }\r
- else {\r
- COPYSLOT(tp_compare);\r
- }\r
- if (type->tp_flags & base->tp_flags & Py_TPFLAGS_HAVE_ITER) {\r
- COPYSLOT(tp_iter);\r
- COPYSLOT(tp_iternext);\r
- }\r
- if (type->tp_flags & base->tp_flags & Py_TPFLAGS_HAVE_CLASS) {\r
- COPYSLOT(tp_descr_get);\r
- COPYSLOT(tp_descr_set);\r
- COPYSLOT(tp_dictoffset);\r
- COPYSLOT(tp_init);\r
- COPYSLOT(tp_alloc);\r
- COPYSLOT(tp_is_gc);\r
- if ((type->tp_flags & Py_TPFLAGS_HAVE_GC) ==\r
- (base->tp_flags & Py_TPFLAGS_HAVE_GC)) {\r
- /* They agree about gc. */\r
- COPYSLOT(tp_free);\r
- }\r
- else if ((type->tp_flags & Py_TPFLAGS_HAVE_GC) &&\r
- type->tp_free == NULL &&\r
- base->tp_free == _PyObject_Del) {\r
- /* A bit of magic to plug in the correct default\r
- * tp_free function when a derived class adds gc,\r
- * didn't define tp_free, and the base uses the\r
- * default non-gc tp_free.\r
- */\r
- type->tp_free = PyObject_GC_Del;\r
- }\r
- /* else they didn't agree about gc, and there isn't something\r
- * obvious to be done -- the type is on its own.\r
- */\r
- }\r
-}\r
-\r
-static int add_operators(PyTypeObject *);\r
-\r
-int\r
-PyType_Ready(PyTypeObject *type)\r
-{\r
- PyObject *dict, *bases;\r
- PyTypeObject *base;\r
- Py_ssize_t i, n;\r
-\r
- if (type->tp_flags & Py_TPFLAGS_READY) {\r
- assert(type->tp_dict != NULL);\r
- return 0;\r
- }\r
- assert((type->tp_flags & Py_TPFLAGS_READYING) == 0);\r
-\r
- type->tp_flags |= Py_TPFLAGS_READYING;\r
-\r
-#ifdef Py_TRACE_REFS\r
- /* PyType_Ready is the closest thing we have to a choke point\r
- * for type objects, so is the best place I can think of to try\r
- * to get type objects into the doubly-linked list of all objects.\r
- * Still, not all type objects go thru PyType_Ready.\r
- */\r
- _Py_AddToAllObjects((PyObject *)type, 0);\r
-#endif\r
-\r
- /* Initialize tp_base (defaults to BaseObject unless that's us) */\r
- base = type->tp_base;\r
- if (base == NULL && type != &PyBaseObject_Type) {\r
- base = type->tp_base = &PyBaseObject_Type;\r
- Py_INCREF(base);\r
- }\r
-\r
- /* Now the only way base can still be NULL is if type is\r
- * &PyBaseObject_Type.\r
- */\r
-\r
- /* Initialize the base class */\r
- if (base && base->tp_dict == NULL) {\r
- if (PyType_Ready(base) < 0)\r
- goto error;\r
- }\r
-\r
- /* Initialize ob_type if NULL. This means extensions that want to be\r
- compilable separately on Windows can call PyType_Ready() instead of\r
- initializing the ob_type field of their type objects. */\r
- /* The test for base != NULL is really unnecessary, since base is only\r
- NULL when type is &PyBaseObject_Type, and we know its ob_type is\r
- not NULL (it's initialized to &PyType_Type). But coverity doesn't\r
- know that. */\r
- if (Py_TYPE(type) == NULL && base != NULL)\r
- Py_TYPE(type) = Py_TYPE(base);\r
-\r
- /* Initialize tp_bases */\r
- bases = type->tp_bases;\r
- if (bases == NULL) {\r
- if (base == NULL)\r
- bases = PyTuple_New(0);\r
- else\r
- bases = PyTuple_Pack(1, base);\r
- if (bases == NULL)\r
- goto error;\r
- type->tp_bases = bases;\r
- }\r
-\r
- /* Initialize tp_dict */\r
- dict = type->tp_dict;\r
- if (dict == NULL) {\r
- dict = PyDict_New();\r
- if (dict == NULL)\r
- goto error;\r
- type->tp_dict = dict;\r
- }\r
-\r
- /* Add type-specific descriptors to tp_dict */\r
- if (add_operators(type) < 0)\r
- goto error;\r
- if (type->tp_methods != NULL) {\r
- if (add_methods(type, type->tp_methods) < 0)\r
- goto error;\r
- }\r
- if (type->tp_members != NULL) {\r
- if (add_members(type, type->tp_members) < 0)\r
- goto error;\r
- }\r
- if (type->tp_getset != NULL) {\r
- if (add_getset(type, type->tp_getset) < 0)\r
- goto error;\r
- }\r
-\r
- /* Calculate method resolution order */\r
- if (mro_internal(type) < 0) {\r
- goto error;\r
- }\r
-\r
- /* Inherit special flags from dominant base */\r
- if (type->tp_base != NULL)\r
- inherit_special(type, type->tp_base);\r
-\r
- /* Initialize tp_dict properly */\r
- bases = type->tp_mro;\r
- assert(bases != NULL);\r
- assert(PyTuple_Check(bases));\r
- n = PyTuple_GET_SIZE(bases);\r
- for (i = 1; i < n; i++) {\r
- PyObject *b = PyTuple_GET_ITEM(bases, i);\r
- if (PyType_Check(b))\r
- inherit_slots(type, (PyTypeObject *)b);\r
- }\r
-\r
- /* All bases of statically allocated type should be statically allocated */\r
- if (Py_Py3kWarningFlag && !(type->tp_flags & Py_TPFLAGS_HEAPTYPE))\r
- for (i = 0; i < n; i++) {\r
- PyObject *b = PyTuple_GET_ITEM(bases, i);\r
- if (PyType_Check(b) &&\r
- (((PyTypeObject *)b)->tp_flags & Py_TPFLAGS_HEAPTYPE)) {\r
- char buf[300];\r
- PyOS_snprintf(buf, sizeof(buf),\r
- "type '%.100s' is not dynamically allocated but "\r
- "its base type '%.100s' is dynamically allocated",\r
- type->tp_name, ((PyTypeObject *)b)->tp_name);\r
- if (PyErr_WarnPy3k(buf, 1) < 0)\r
- goto error;\r
- break;\r
- }\r
- }\r
-\r
- /* Sanity check for tp_free. */\r
- if (PyType_IS_GC(type) && (type->tp_flags & Py_TPFLAGS_BASETYPE) &&\r
- (type->tp_free == NULL || type->tp_free == PyObject_Del)) {\r
- /* This base class needs to call tp_free, but doesn't have\r
- * one, or its tp_free is for non-gc'ed objects.\r
- */\r
- PyErr_Format(PyExc_TypeError, "type '%.100s' participates in "\r
- "gc and is a base type but has inappropriate "\r
- "tp_free slot",\r
- type->tp_name);\r
- goto error;\r
- }\r
-\r
- /* if the type dictionary doesn't contain a __doc__, set it from\r
- the tp_doc slot.\r
- */\r
- if (PyDict_GetItemString(type->tp_dict, "__doc__") == NULL) {\r
- if (type->tp_doc != NULL) {\r
- PyObject *doc = PyString_FromString(type->tp_doc);\r
- if (doc == NULL)\r
- goto error;\r
- PyDict_SetItemString(type->tp_dict, "__doc__", doc);\r
- Py_DECREF(doc);\r
- } else {\r
- PyDict_SetItemString(type->tp_dict,\r
- "__doc__", Py_None);\r
- }\r
- }\r
-\r
- /* Some more special stuff */\r
- base = type->tp_base;\r
- if (base != NULL) {\r
- if (type->tp_as_number == NULL)\r
- type->tp_as_number = base->tp_as_number;\r
- if (type->tp_as_sequence == NULL)\r
- type->tp_as_sequence = base->tp_as_sequence;\r
- if (type->tp_as_mapping == NULL)\r
- type->tp_as_mapping = base->tp_as_mapping;\r
- if (type->tp_as_buffer == NULL)\r
- type->tp_as_buffer = base->tp_as_buffer;\r
- }\r
-\r
- /* Link into each base class's list of subclasses */\r
- bases = type->tp_bases;\r
- n = PyTuple_GET_SIZE(bases);\r
- for (i = 0; i < n; i++) {\r
- PyObject *b = PyTuple_GET_ITEM(bases, i);\r
- if (PyType_Check(b) &&\r
- add_subclass((PyTypeObject *)b, type) < 0)\r
- goto error;\r
- }\r
-\r
- /* All done -- set the ready flag */\r
- assert(type->tp_dict != NULL);\r
- type->tp_flags =\r
- (type->tp_flags & ~Py_TPFLAGS_READYING) | Py_TPFLAGS_READY;\r
- return 0;\r
-\r
- error:\r
- type->tp_flags &= ~Py_TPFLAGS_READYING;\r
- return -1;\r
-}\r
-\r
-static int\r
-add_subclass(PyTypeObject *base, PyTypeObject *type)\r
-{\r
- Py_ssize_t i;\r
- int result;\r
- PyObject *list, *ref, *newobj;\r
-\r
- list = base->tp_subclasses;\r
- if (list == NULL) {\r
- base->tp_subclasses = list = PyList_New(0);\r
- if (list == NULL)\r
- return -1;\r
- }\r
- assert(PyList_Check(list));\r
- newobj = PyWeakref_NewRef((PyObject *)type, NULL);\r
- i = PyList_GET_SIZE(list);\r
- while (--i >= 0) {\r
- ref = PyList_GET_ITEM(list, i);\r
- assert(PyWeakref_CheckRef(ref));\r
- if (PyWeakref_GET_OBJECT(ref) == Py_None)\r
- return PyList_SetItem(list, i, newobj);\r
- }\r
- result = PyList_Append(list, newobj);\r
- Py_DECREF(newobj);\r
- return result;\r
-}\r
-\r
-static void\r
-remove_subclass(PyTypeObject *base, PyTypeObject *type)\r
-{\r
- Py_ssize_t i;\r
- PyObject *list, *ref;\r
-\r
- list = base->tp_subclasses;\r
- if (list == NULL) {\r
- return;\r
- }\r
- assert(PyList_Check(list));\r
- i = PyList_GET_SIZE(list);\r
- while (--i >= 0) {\r
- ref = PyList_GET_ITEM(list, i);\r
- assert(PyWeakref_CheckRef(ref));\r
- if (PyWeakref_GET_OBJECT(ref) == (PyObject*)type) {\r
- /* this can't fail, right? */\r
- PySequence_DelItem(list, i);\r
- return;\r
- }\r
- }\r
-}\r
-\r
-static int\r
-check_num_args(PyObject *ob, int n)\r
-{\r
- if (!PyTuple_CheckExact(ob)) {\r
- PyErr_SetString(PyExc_SystemError,\r
- "PyArg_UnpackTuple() argument list is not a tuple");\r
- return 0;\r
- }\r
- if (n == PyTuple_GET_SIZE(ob))\r
- return 1;\r
- PyErr_Format(\r
- PyExc_TypeError,\r
- "expected %d arguments, got %zd", n, PyTuple_GET_SIZE(ob));\r
- return 0;\r
-}\r
-\r
-/* Generic wrappers for overloadable 'operators' such as __getitem__ */\r
-\r
-/* There's a wrapper *function* for each distinct function typedef used\r
- for type object slots (e.g. binaryfunc, ternaryfunc, etc.). There's a\r
- wrapper *table* for each distinct operation (e.g. __len__, __add__).\r
- Most tables have only one entry; the tables for binary operators have two\r
- entries, one regular and one with reversed arguments. */\r
-\r
-static PyObject *\r
-wrap_lenfunc(PyObject *self, PyObject *args, void *wrapped)\r
-{\r
- lenfunc func = (lenfunc)wrapped;\r
- Py_ssize_t res;\r
-\r
- if (!check_num_args(args, 0))\r
- return NULL;\r
- res = (*func)(self);\r
- if (res == -1 && PyErr_Occurred())\r
- return NULL;\r
- return PyInt_FromLong((long)res);\r
-}\r
-\r
-static PyObject *\r
-wrap_inquirypred(PyObject *self, PyObject *args, void *wrapped)\r
-{\r
- inquiry func = (inquiry)wrapped;\r
- int res;\r
-\r
- if (!check_num_args(args, 0))\r
- return NULL;\r
- res = (*func)(self);\r
- if (res == -1 && PyErr_Occurred())\r
- return NULL;\r
- return PyBool_FromLong((long)res);\r
-}\r
-\r
-static PyObject *\r
-wrap_binaryfunc(PyObject *self, PyObject *args, void *wrapped)\r
-{\r
- binaryfunc func = (binaryfunc)wrapped;\r
- PyObject *other;\r
-\r
- if (!check_num_args(args, 1))\r
- return NULL;\r
- other = PyTuple_GET_ITEM(args, 0);\r
- return (*func)(self, other);\r
-}\r
-\r
-static PyObject *\r
-wrap_binaryfunc_l(PyObject *self, PyObject *args, void *wrapped)\r
-{\r
- binaryfunc func = (binaryfunc)wrapped;\r
- PyObject *other;\r
-\r
- if (!check_num_args(args, 1))\r
- return NULL;\r
- other = PyTuple_GET_ITEM(args, 0);\r
- if (!(self->ob_type->tp_flags & Py_TPFLAGS_CHECKTYPES) &&\r
- !PyType_IsSubtype(other->ob_type, self->ob_type)) {\r
- Py_INCREF(Py_NotImplemented);\r
- return Py_NotImplemented;\r
- }\r
- return (*func)(self, other);\r
-}\r
-\r
-static PyObject *\r
-wrap_binaryfunc_r(PyObject *self, PyObject *args, void *wrapped)\r
-{\r
- binaryfunc func = (binaryfunc)wrapped;\r
- PyObject *other;\r
-\r
- if (!check_num_args(args, 1))\r
- return NULL;\r
- other = PyTuple_GET_ITEM(args, 0);\r
- if (!(self->ob_type->tp_flags & Py_TPFLAGS_CHECKTYPES) &&\r
- !PyType_IsSubtype(other->ob_type, self->ob_type)) {\r
- Py_INCREF(Py_NotImplemented);\r
- return Py_NotImplemented;\r
- }\r
- return (*func)(other, self);\r
-}\r
-\r
-static PyObject *\r
-wrap_coercefunc(PyObject *self, PyObject *args, void *wrapped)\r
-{\r
- coercion func = (coercion)wrapped;\r
- PyObject *other, *res;\r
- int ok;\r
-\r
- if (!check_num_args(args, 1))\r
- return NULL;\r
- other = PyTuple_GET_ITEM(args, 0);\r
- ok = func(&self, &other);\r
- if (ok < 0)\r
- return NULL;\r
- if (ok > 0) {\r
- Py_INCREF(Py_NotImplemented);\r
- return Py_NotImplemented;\r
- }\r
- res = PyTuple_New(2);\r
- if (res == NULL) {\r
- Py_DECREF(self);\r
- Py_DECREF(other);\r
- return NULL;\r
- }\r
- PyTuple_SET_ITEM(res, 0, self);\r
- PyTuple_SET_ITEM(res, 1, other);\r
- return res;\r
-}\r
-\r
-static PyObject *\r
-wrap_ternaryfunc(PyObject *self, PyObject *args, void *wrapped)\r
-{\r
- ternaryfunc func = (ternaryfunc)wrapped;\r
- PyObject *other;\r
- PyObject *third = Py_None;\r
-\r
- /* Note: This wrapper only works for __pow__() */\r
-\r
- if (!PyArg_UnpackTuple(args, "", 1, 2, &other, &third))\r
- return NULL;\r
- return (*func)(self, other, third);\r
-}\r
-\r
-static PyObject *\r
-wrap_ternaryfunc_r(PyObject *self, PyObject *args, void *wrapped)\r
-{\r
- ternaryfunc func = (ternaryfunc)wrapped;\r
- PyObject *other;\r
- PyObject *third = Py_None;\r
-\r
- /* Note: This wrapper only works for __pow__() */\r
-\r
- if (!PyArg_UnpackTuple(args, "", 1, 2, &other, &third))\r
- return NULL;\r
- return (*func)(other, self, third);\r
-}\r
-\r
-static PyObject *\r
-wrap_unaryfunc(PyObject *self, PyObject *args, void *wrapped)\r
-{\r
- unaryfunc func = (unaryfunc)wrapped;\r
-\r
- if (!check_num_args(args, 0))\r
- return NULL;\r
- return (*func)(self);\r
-}\r
-\r
-static PyObject *\r
-wrap_indexargfunc(PyObject *self, PyObject *args, void *wrapped)\r
-{\r
- ssizeargfunc func = (ssizeargfunc)wrapped;\r
- PyObject* o;\r
- Py_ssize_t i;\r
-\r
- if (!PyArg_UnpackTuple(args, "", 1, 1, &o))\r
- return NULL;\r
- i = PyNumber_AsSsize_t(o, PyExc_OverflowError);\r
- if (i == -1 && PyErr_Occurred())\r
- return NULL;\r
- return (*func)(self, i);\r
-}\r
-\r
-static Py_ssize_t\r
-getindex(PyObject *self, PyObject *arg)\r
-{\r
- Py_ssize_t i;\r
-\r
- i = PyNumber_AsSsize_t(arg, PyExc_OverflowError);\r
- if (i == -1 && PyErr_Occurred())\r
- return -1;\r
- if (i < 0) {\r
- PySequenceMethods *sq = Py_TYPE(self)->tp_as_sequence;\r
- if (sq && sq->sq_length) {\r
- Py_ssize_t n = (*sq->sq_length)(self);\r
- if (n < 0)\r
- return -1;\r
- i += n;\r
- }\r
- }\r
- return i;\r
-}\r
-\r
-static PyObject *\r
-wrap_sq_item(PyObject *self, PyObject *args, void *wrapped)\r
-{\r
- ssizeargfunc func = (ssizeargfunc)wrapped;\r
- PyObject *arg;\r
- Py_ssize_t i;\r
-\r
- if (PyTuple_GET_SIZE(args) == 1) {\r
- arg = PyTuple_GET_ITEM(args, 0);\r
- i = getindex(self, arg);\r
- if (i == -1 && PyErr_Occurred())\r
- return NULL;\r
- return (*func)(self, i);\r
- }\r
- check_num_args(args, 1);\r
- assert(PyErr_Occurred());\r
- return NULL;\r
-}\r
-\r
-static PyObject *\r
-wrap_ssizessizeargfunc(PyObject *self, PyObject *args, void *wrapped)\r
-{\r
- ssizessizeargfunc func = (ssizessizeargfunc)wrapped;\r
- Py_ssize_t i, j;\r
-\r
- if (!PyArg_ParseTuple(args, "nn", &i, &j))\r
- return NULL;\r
- return (*func)(self, i, j);\r
-}\r
-\r
-static PyObject *\r
-wrap_sq_setitem(PyObject *self, PyObject *args, void *wrapped)\r
-{\r
- ssizeobjargproc func = (ssizeobjargproc)wrapped;\r
- Py_ssize_t i;\r
- int res;\r
- PyObject *arg, *value;\r
-\r
- if (!PyArg_UnpackTuple(args, "", 2, 2, &arg, &value))\r
- return NULL;\r
- i = getindex(self, arg);\r
- if (i == -1 && PyErr_Occurred())\r
- return NULL;\r
- res = (*func)(self, i, value);\r
- if (res == -1 && PyErr_Occurred())\r
- return NULL;\r
- Py_INCREF(Py_None);\r
- return Py_None;\r
-}\r
-\r
-static PyObject *\r
-wrap_sq_delitem(PyObject *self, PyObject *args, void *wrapped)\r
-{\r
- ssizeobjargproc func = (ssizeobjargproc)wrapped;\r
- Py_ssize_t i;\r
- int res;\r
- PyObject *arg;\r
-\r
- if (!check_num_args(args, 1))\r
- return NULL;\r
- arg = PyTuple_GET_ITEM(args, 0);\r
- i = getindex(self, arg);\r
- if (i == -1 && PyErr_Occurred())\r
- return NULL;\r
- res = (*func)(self, i, NULL);\r
- if (res == -1 && PyErr_Occurred())\r
- return NULL;\r
- Py_INCREF(Py_None);\r
- return Py_None;\r
-}\r
-\r
-static PyObject *\r
-wrap_ssizessizeobjargproc(PyObject *self, PyObject *args, void *wrapped)\r
-{\r
- ssizessizeobjargproc func = (ssizessizeobjargproc)wrapped;\r
- Py_ssize_t i, j;\r
- int res;\r
- PyObject *value;\r
-\r
- if (!PyArg_ParseTuple(args, "nnO", &i, &j, &value))\r
- return NULL;\r
- res = (*func)(self, i, j, value);\r
- if (res == -1 && PyErr_Occurred())\r
- return NULL;\r
- Py_INCREF(Py_None);\r
- return Py_None;\r
-}\r
-\r
-static PyObject *\r
-wrap_delslice(PyObject *self, PyObject *args, void *wrapped)\r
-{\r
- ssizessizeobjargproc func = (ssizessizeobjargproc)wrapped;\r
- Py_ssize_t i, j;\r
- int res;\r
-\r
- if (!PyArg_ParseTuple(args, "nn", &i, &j))\r
- return NULL;\r
- res = (*func)(self, i, j, NULL);\r
- if (res == -1 && PyErr_Occurred())\r
- return NULL;\r
- Py_INCREF(Py_None);\r
- return Py_None;\r
-}\r
-\r
-/* XXX objobjproc is a misnomer; should be objargpred */\r
-static PyObject *\r
-wrap_objobjproc(PyObject *self, PyObject *args, void *wrapped)\r
-{\r
- objobjproc func = (objobjproc)wrapped;\r
- int res;\r
- PyObject *value;\r
-\r
- if (!check_num_args(args, 1))\r
- return NULL;\r
- value = PyTuple_GET_ITEM(args, 0);\r
- res = (*func)(self, value);\r
- if (res == -1 && PyErr_Occurred())\r
- return NULL;\r
- else\r
- return PyBool_FromLong(res);\r
-}\r
-\r
-static PyObject *\r
-wrap_objobjargproc(PyObject *self, PyObject *args, void *wrapped)\r
-{\r
- objobjargproc func = (objobjargproc)wrapped;\r
- int res;\r
- PyObject *key, *value;\r
-\r
- if (!PyArg_UnpackTuple(args, "", 2, 2, &key, &value))\r
- return NULL;\r
- res = (*func)(self, key, value);\r
- if (res == -1 && PyErr_Occurred())\r
- return NULL;\r
- Py_INCREF(Py_None);\r
- return Py_None;\r
-}\r
-\r
-static PyObject *\r
-wrap_delitem(PyObject *self, PyObject *args, void *wrapped)\r
-{\r
- objobjargproc func = (objobjargproc)wrapped;\r
- int res;\r
- PyObject *key;\r
-\r
- if (!check_num_args(args, 1))\r
- return NULL;\r
- key = PyTuple_GET_ITEM(args, 0);\r
- res = (*func)(self, key, NULL);\r
- if (res == -1 && PyErr_Occurred())\r
- return NULL;\r
- Py_INCREF(Py_None);\r
- return Py_None;\r
-}\r
-\r
-static PyObject *\r
-wrap_cmpfunc(PyObject *self, PyObject *args, void *wrapped)\r
-{\r
- cmpfunc func = (cmpfunc)wrapped;\r
- int res;\r
- PyObject *other;\r
-\r
- if (!check_num_args(args, 1))\r
- return NULL;\r
- other = PyTuple_GET_ITEM(args, 0);\r
- if (Py_TYPE(other)->tp_compare != func &&\r
- !PyType_IsSubtype(Py_TYPE(other), Py_TYPE(self))) {\r
- PyErr_Format(\r
- PyExc_TypeError,\r
- "%s.__cmp__(x,y) requires y to be a '%s', not a '%s'",\r
- Py_TYPE(self)->tp_name,\r
- Py_TYPE(self)->tp_name,\r
- Py_TYPE(other)->tp_name);\r
- return NULL;\r
- }\r
- res = (*func)(self, other);\r
- if (PyErr_Occurred())\r
- return NULL;\r
- return PyInt_FromLong((long)res);\r
-}\r
-\r
-/* Helper to check for object.__setattr__ or __delattr__ applied to a type.\r
- This is called the Carlo Verre hack after its discoverer. */\r
-static int\r
-hackcheck(PyObject *self, setattrofunc func, char *what)\r
-{\r
- PyTypeObject *type = Py_TYPE(self);\r
- while (type && type->tp_flags & Py_TPFLAGS_HEAPTYPE)\r
- type = type->tp_base;\r
- /* If type is NULL now, this is a really weird type.\r
- In the spirit of backwards compatibility (?), just shut up. */\r
- if (type && type->tp_setattro != func) {\r
- PyErr_Format(PyExc_TypeError,\r
- "can't apply this %s to %s object",\r
- what,\r
- type->tp_name);\r
- return 0;\r
- }\r
- return 1;\r
-}\r
-\r
-static PyObject *\r
-wrap_setattr(PyObject *self, PyObject *args, void *wrapped)\r
-{\r
- setattrofunc func = (setattrofunc)wrapped;\r
- int res;\r
- PyObject *name, *value;\r
-\r
- if (!PyArg_UnpackTuple(args, "", 2, 2, &name, &value))\r
- return NULL;\r
- if (!hackcheck(self, func, "__setattr__"))\r
- return NULL;\r
- res = (*func)(self, name, value);\r
- if (res < 0)\r
- return NULL;\r
- Py_INCREF(Py_None);\r
- return Py_None;\r
-}\r
-\r
-static PyObject *\r
-wrap_delattr(PyObject *self, PyObject *args, void *wrapped)\r
-{\r
- setattrofunc func = (setattrofunc)wrapped;\r
- int res;\r
- PyObject *name;\r
-\r
- if (!check_num_args(args, 1))\r
- return NULL;\r
- name = PyTuple_GET_ITEM(args, 0);\r
- if (!hackcheck(self, func, "__delattr__"))\r
- return NULL;\r
- res = (*func)(self, name, NULL);\r
- if (res < 0)\r
- return NULL;\r
- Py_INCREF(Py_None);\r
- return Py_None;\r
-}\r
-\r
-static PyObject *\r
-wrap_hashfunc(PyObject *self, PyObject *args, void *wrapped)\r
-{\r
- hashfunc func = (hashfunc)wrapped;\r
- long res;\r
-\r
- if (!check_num_args(args, 0))\r
- return NULL;\r
- res = (*func)(self);\r
- if (res == -1 && PyErr_Occurred())\r
- return NULL;\r
- return PyInt_FromLong(res);\r
-}\r
-\r
-static PyObject *\r
-wrap_call(PyObject *self, PyObject *args, void *wrapped, PyObject *kwds)\r
-{\r
- ternaryfunc func = (ternaryfunc)wrapped;\r
-\r
- return (*func)(self, args, kwds);\r
-}\r
-\r
-static PyObject *\r
-wrap_richcmpfunc(PyObject *self, PyObject *args, void *wrapped, int op)\r
-{\r
- richcmpfunc func = (richcmpfunc)wrapped;\r
- PyObject *other;\r
-\r
- if (!check_num_args(args, 1))\r
- return NULL;\r
- other = PyTuple_GET_ITEM(args, 0);\r
- return (*func)(self, other, op);\r
-}\r
-\r
-#undef RICHCMP_WRAPPER\r
-#define RICHCMP_WRAPPER(NAME, OP) \\r
-static PyObject * \\r
-richcmp_##NAME(PyObject *self, PyObject *args, void *wrapped) \\r
-{ \\r
- return wrap_richcmpfunc(self, args, wrapped, OP); \\r
-}\r
-\r
-RICHCMP_WRAPPER(lt, Py_LT)\r
-RICHCMP_WRAPPER(le, Py_LE)\r
-RICHCMP_WRAPPER(eq, Py_EQ)\r
-RICHCMP_WRAPPER(ne, Py_NE)\r
-RICHCMP_WRAPPER(gt, Py_GT)\r
-RICHCMP_WRAPPER(ge, Py_GE)\r
-\r
-static PyObject *\r
-wrap_next(PyObject *self, PyObject *args, void *wrapped)\r
-{\r
- unaryfunc func = (unaryfunc)wrapped;\r
- PyObject *res;\r
-\r
- if (!check_num_args(args, 0))\r
- return NULL;\r
- res = (*func)(self);\r
- if (res == NULL && !PyErr_Occurred())\r
- PyErr_SetNone(PyExc_StopIteration);\r
- return res;\r
-}\r
-\r
-static PyObject *\r
-wrap_descr_get(PyObject *self, PyObject *args, void *wrapped)\r
-{\r
- descrgetfunc func = (descrgetfunc)wrapped;\r
- PyObject *obj;\r
- PyObject *type = NULL;\r
-\r
- if (!PyArg_UnpackTuple(args, "", 1, 2, &obj, &type))\r
- return NULL;\r
- if (obj == Py_None)\r
- obj = NULL;\r
- if (type == Py_None)\r
- type = NULL;\r
- if (type == NULL &&obj == NULL) {\r
- PyErr_SetString(PyExc_TypeError,\r
- "__get__(None, None) is invalid");\r
- return NULL;\r
- }\r
- return (*func)(self, obj, type);\r
-}\r
-\r
-static PyObject *\r
-wrap_descr_set(PyObject *self, PyObject *args, void *wrapped)\r
-{\r
- descrsetfunc func = (descrsetfunc)wrapped;\r
- PyObject *obj, *value;\r
- int ret;\r
-\r
- if (!PyArg_UnpackTuple(args, "", 2, 2, &obj, &value))\r
- return NULL;\r
- ret = (*func)(self, obj, value);\r
- if (ret < 0)\r
- return NULL;\r
- Py_INCREF(Py_None);\r
- return Py_None;\r
-}\r
-\r
-static PyObject *\r
-wrap_descr_delete(PyObject *self, PyObject *args, void *wrapped)\r
-{\r
- descrsetfunc func = (descrsetfunc)wrapped;\r
- PyObject *obj;\r
- int ret;\r
-\r
- if (!check_num_args(args, 1))\r
- return NULL;\r
- obj = PyTuple_GET_ITEM(args, 0);\r
- ret = (*func)(self, obj, NULL);\r
- if (ret < 0)\r
- return NULL;\r
- Py_INCREF(Py_None);\r
- return Py_None;\r
-}\r
-\r
-static PyObject *\r
-wrap_init(PyObject *self, PyObject *args, void *wrapped, PyObject *kwds)\r
-{\r
- initproc func = (initproc)wrapped;\r
-\r
- if (func(self, args, kwds) < 0)\r
- return NULL;\r
- Py_INCREF(Py_None);\r
- return Py_None;\r
-}\r
-\r
-static PyObject *\r
-tp_new_wrapper(PyObject *self, PyObject *args, PyObject *kwds)\r
-{\r
- PyTypeObject *type, *subtype, *staticbase;\r
- PyObject *arg0, *res;\r
-\r
- if (self == NULL || !PyType_Check(self))\r
- Py_FatalError("__new__() called with non-type 'self'");\r
- type = (PyTypeObject *)self;\r
- if (!PyTuple_Check(args) || PyTuple_GET_SIZE(args) < 1) {\r
- PyErr_Format(PyExc_TypeError,\r
- "%s.__new__(): not enough arguments",\r
- type->tp_name);\r
- return NULL;\r
- }\r
- arg0 = PyTuple_GET_ITEM(args, 0);\r
- if (!PyType_Check(arg0)) {\r
- PyErr_Format(PyExc_TypeError,\r
- "%s.__new__(X): X is not a type object (%s)",\r
- type->tp_name,\r
- Py_TYPE(arg0)->tp_name);\r
- return NULL;\r
- }\r
- subtype = (PyTypeObject *)arg0;\r
- if (!PyType_IsSubtype(subtype, type)) {\r
- PyErr_Format(PyExc_TypeError,\r
- "%s.__new__(%s): %s is not a subtype of %s",\r
- type->tp_name,\r
- subtype->tp_name,\r
- subtype->tp_name,\r
- type->tp_name);\r
- return NULL;\r
- }\r
-\r
- /* Check that the use doesn't do something silly and unsafe like\r
- object.__new__(dict). To do this, we check that the\r
- most derived base that's not a heap type is this type. */\r
- staticbase = subtype;\r
- while (staticbase && (staticbase->tp_flags & Py_TPFLAGS_HEAPTYPE))\r
- staticbase = staticbase->tp_base;\r
- /* If staticbase is NULL now, it is a really weird type.\r
- In the spirit of backwards compatibility (?), just shut up. */\r
- if (staticbase && staticbase->tp_new != type->tp_new) {\r
- PyErr_Format(PyExc_TypeError,\r
- "%s.__new__(%s) is not safe, use %s.__new__()",\r
- type->tp_name,\r
- subtype->tp_name,\r
- staticbase->tp_name);\r
- return NULL;\r
- }\r
-\r
- args = PyTuple_GetSlice(args, 1, PyTuple_GET_SIZE(args));\r
- if (args == NULL)\r
- return NULL;\r
- res = type->tp_new(subtype, args, kwds);\r
- Py_DECREF(args);\r
- return res;\r
-}\r
-\r
-static struct PyMethodDef tp_new_methoddef[] = {\r
- {"__new__", (PyCFunction)tp_new_wrapper, METH_VARARGS|METH_KEYWORDS,\r
- PyDoc_STR("T.__new__(S, ...) -> "\r
- "a new object with type S, a subtype of T")},\r
- {0}\r
-};\r
-\r
-static int\r
-add_tp_new_wrapper(PyTypeObject *type)\r
-{\r
- PyObject *func;\r
-\r
- if (PyDict_GetItemString(type->tp_dict, "__new__") != NULL)\r
- return 0;\r
- func = PyCFunction_New(tp_new_methoddef, (PyObject *)type);\r
- if (func == NULL)\r
- return -1;\r
- if (PyDict_SetItemString(type->tp_dict, "__new__", func)) {\r
- Py_DECREF(func);\r
- return -1;\r
- }\r
- Py_DECREF(func);\r
- return 0;\r
-}\r
-\r
-/* Slot wrappers that call the corresponding __foo__ slot. See comments\r
- below at override_slots() for more explanation. */\r
-\r
-#define SLOT0(FUNCNAME, OPSTR) \\r
-static PyObject * \\r
-FUNCNAME(PyObject *self) \\r
-{ \\r
- static PyObject *cache_str; \\r
- return call_method(self, OPSTR, &cache_str, "()"); \\r
-}\r
-\r
-#define SLOT1(FUNCNAME, OPSTR, ARG1TYPE, ARGCODES) \\r
-static PyObject * \\r
-FUNCNAME(PyObject *self, ARG1TYPE arg1) \\r
-{ \\r
- static PyObject *cache_str; \\r
- return call_method(self, OPSTR, &cache_str, "(" ARGCODES ")", arg1); \\r
-}\r
-\r
-/* Boolean helper for SLOT1BINFULL().\r
- right.__class__ is a nontrivial subclass of left.__class__. */\r
-static int\r
-method_is_overloaded(PyObject *left, PyObject *right, char *name)\r
-{\r
- PyObject *a, *b;\r
- int ok;\r
-\r
- b = PyObject_GetAttrString((PyObject *)(Py_TYPE(right)), name);\r
- if (b == NULL) {\r
- PyErr_Clear();\r
- /* If right doesn't have it, it's not overloaded */\r
- return 0;\r
- }\r
-\r
- a = PyObject_GetAttrString((PyObject *)(Py_TYPE(left)), name);\r
- if (a == NULL) {\r
- PyErr_Clear();\r
- Py_DECREF(b);\r
- /* If right has it but left doesn't, it's overloaded */\r
- return 1;\r
- }\r
-\r
- ok = PyObject_RichCompareBool(a, b, Py_NE);\r
- Py_DECREF(a);\r
- Py_DECREF(b);\r
- if (ok < 0) {\r
- PyErr_Clear();\r
- return 0;\r
- }\r
-\r
- return ok;\r
-}\r
-\r
-\r
-#define SLOT1BINFULL(FUNCNAME, TESTFUNC, SLOTNAME, OPSTR, ROPSTR) \\r
-static PyObject * \\r
-FUNCNAME(PyObject *self, PyObject *other) \\r
-{ \\r
- static PyObject *cache_str, *rcache_str; \\r
- int do_other = Py_TYPE(self) != Py_TYPE(other) && \\r
- Py_TYPE(other)->tp_as_number != NULL && \\r
- Py_TYPE(other)->tp_as_number->SLOTNAME == TESTFUNC; \\r
- if (Py_TYPE(self)->tp_as_number != NULL && \\r
- Py_TYPE(self)->tp_as_number->SLOTNAME == TESTFUNC) { \\r
- PyObject *r; \\r
- if (do_other && \\r
- PyType_IsSubtype(Py_TYPE(other), Py_TYPE(self)) && \\r
- method_is_overloaded(self, other, ROPSTR)) { \\r
- r = call_maybe( \\r
- other, ROPSTR, &rcache_str, "(O)", self); \\r
- if (r != Py_NotImplemented) \\r
- return r; \\r
- Py_DECREF(r); \\r
- do_other = 0; \\r
- } \\r
- r = call_maybe( \\r
- self, OPSTR, &cache_str, "(O)", other); \\r
- if (r != Py_NotImplemented || \\r
- Py_TYPE(other) == Py_TYPE(self)) \\r
- return r; \\r
- Py_DECREF(r); \\r
- } \\r
- if (do_other) { \\r
- return call_maybe( \\r
- other, ROPSTR, &rcache_str, "(O)", self); \\r
- } \\r
- Py_INCREF(Py_NotImplemented); \\r
- return Py_NotImplemented; \\r
-}\r
-\r
-#define SLOT1BIN(FUNCNAME, SLOTNAME, OPSTR, ROPSTR) \\r
- SLOT1BINFULL(FUNCNAME, FUNCNAME, SLOTNAME, OPSTR, ROPSTR)\r
-\r
-#define SLOT2(FUNCNAME, OPSTR, ARG1TYPE, ARG2TYPE, ARGCODES) \\r
-static PyObject * \\r
-FUNCNAME(PyObject *self, ARG1TYPE arg1, ARG2TYPE arg2) \\r
-{ \\r
- static PyObject *cache_str; \\r
- return call_method(self, OPSTR, &cache_str, \\r
- "(" ARGCODES ")", arg1, arg2); \\r
-}\r
-\r
-static Py_ssize_t\r
-slot_sq_length(PyObject *self)\r
-{\r
- static PyObject *len_str;\r
- PyObject *res = call_method(self, "__len__", &len_str, "()");\r
- Py_ssize_t len;\r
-\r
- if (res == NULL)\r
- return -1;\r
- len = PyInt_AsSsize_t(res);\r
- Py_DECREF(res);\r
- if (len < 0) {\r
- if (!PyErr_Occurred())\r
- PyErr_SetString(PyExc_ValueError,\r
- "__len__() should return >= 0");\r
- return -1;\r
- }\r
- return len;\r
-}\r
-\r
-/* Super-optimized version of slot_sq_item.\r
- Other slots could do the same... */\r
-static PyObject *\r
-slot_sq_item(PyObject *self, Py_ssize_t i)\r
-{\r
- static PyObject *getitem_str;\r
- PyObject *func, *args = NULL, *ival = NULL, *retval = NULL;\r
- descrgetfunc f;\r
-\r
- if (getitem_str == NULL) {\r
- getitem_str = PyString_InternFromString("__getitem__");\r
- if (getitem_str == NULL)\r
- return NULL;\r
- }\r
- func = _PyType_Lookup(Py_TYPE(self), getitem_str);\r
- if (func != NULL) {\r
- if ((f = Py_TYPE(func)->tp_descr_get) == NULL)\r
- Py_INCREF(func);\r
- else {\r
- func = f(func, self, (PyObject *)(Py_TYPE(self)));\r
- if (func == NULL) {\r
- return NULL;\r
- }\r
- }\r
- ival = PyInt_FromSsize_t(i);\r
- if (ival != NULL) {\r
- args = PyTuple_New(1);\r
- if (args != NULL) {\r
- PyTuple_SET_ITEM(args, 0, ival);\r
- retval = PyObject_Call(func, args, NULL);\r
- Py_XDECREF(args);\r
- Py_XDECREF(func);\r
- return retval;\r
- }\r
- }\r
- }\r
- else {\r
- PyErr_SetObject(PyExc_AttributeError, getitem_str);\r
- }\r
- Py_XDECREF(args);\r
- Py_XDECREF(ival);\r
- Py_XDECREF(func);\r
- return NULL;\r
-}\r
-\r
-static PyObject*\r
-slot_sq_slice(PyObject *self, Py_ssize_t i, Py_ssize_t j)\r
-{\r
- static PyObject *getslice_str;\r
-\r
- if (PyErr_WarnPy3k("in 3.x, __getslice__ has been removed; "\r
- "use __getitem__", 1) < 0)\r
- return NULL;\r
- return call_method(self, "__getslice__", &getslice_str,\r
- "nn", i, j);\r
-}\r
-\r
-static int\r
-slot_sq_ass_item(PyObject *self, Py_ssize_t index, PyObject *value)\r
-{\r
- PyObject *res;\r
- static PyObject *delitem_str, *setitem_str;\r
-\r
- if (value == NULL)\r
- res = call_method(self, "__delitem__", &delitem_str,\r
- "(n)", index);\r
- else\r
- res = call_method(self, "__setitem__", &setitem_str,\r
- "(nO)", index, value);\r
- if (res == NULL)\r
- return -1;\r
- Py_DECREF(res);\r
- return 0;\r
-}\r
-\r
-static int\r
-slot_sq_ass_slice(PyObject *self, Py_ssize_t i, Py_ssize_t j, PyObject *value)\r
-{\r
- PyObject *res;\r
- static PyObject *delslice_str, *setslice_str;\r
-\r
- if (value == NULL) {\r
- if (PyErr_WarnPy3k("in 3.x, __delslice__ has been removed; "\r
- "use __delitem__", 1) < 0)\r
- return -1;\r
- res = call_method(self, "__delslice__", &delslice_str,\r
- "(nn)", i, j);\r
- }\r
- else {\r
- if (PyErr_WarnPy3k("in 3.x, __setslice__ has been removed; "\r
- "use __setitem__", 1) < 0)\r
- return -1;\r
- res = call_method(self, "__setslice__", &setslice_str,\r
- "(nnO)", i, j, value);\r
- }\r
- if (res == NULL)\r
- return -1;\r
- Py_DECREF(res);\r
- return 0;\r
-}\r
-\r
-static int\r
-slot_sq_contains(PyObject *self, PyObject *value)\r
-{\r
- PyObject *func, *res, *args;\r
- int result = -1;\r
-\r
- static PyObject *contains_str;\r
-\r
- func = lookup_maybe(self, "__contains__", &contains_str);\r
- if (func != NULL) {\r
- args = PyTuple_Pack(1, value);\r
- if (args == NULL)\r
- res = NULL;\r
- else {\r
- res = PyObject_Call(func, args, NULL);\r
- Py_DECREF(args);\r
- }\r
- Py_DECREF(func);\r
- if (res != NULL) {\r
- result = PyObject_IsTrue(res);\r
- Py_DECREF(res);\r
- }\r
- }\r
- else if (! PyErr_Occurred()) {\r
- /* Possible results: -1 and 1 */\r
- result = (int)_PySequence_IterSearch(self, value,\r
- PY_ITERSEARCH_CONTAINS);\r
- }\r
- return result;\r
-}\r
-\r
-#define slot_mp_length slot_sq_length\r
-\r
-SLOT1(slot_mp_subscript, "__getitem__", PyObject *, "O")\r
-\r
-static int\r
-slot_mp_ass_subscript(PyObject *self, PyObject *key, PyObject *value)\r
-{\r
- PyObject *res;\r
- static PyObject *delitem_str, *setitem_str;\r
-\r
- if (value == NULL)\r
- res = call_method(self, "__delitem__", &delitem_str,\r
- "(O)", key);\r
- else\r
- res = call_method(self, "__setitem__", &setitem_str,\r
- "(OO)", key, value);\r
- if (res == NULL)\r
- return -1;\r
- Py_DECREF(res);\r
- return 0;\r
-}\r
-\r
-SLOT1BIN(slot_nb_add, nb_add, "__add__", "__radd__")\r
-SLOT1BIN(slot_nb_subtract, nb_subtract, "__sub__", "__rsub__")\r
-SLOT1BIN(slot_nb_multiply, nb_multiply, "__mul__", "__rmul__")\r
-SLOT1BIN(slot_nb_divide, nb_divide, "__div__", "__rdiv__")\r
-SLOT1BIN(slot_nb_remainder, nb_remainder, "__mod__", "__rmod__")\r
-SLOT1BIN(slot_nb_divmod, nb_divmod, "__divmod__", "__rdivmod__")\r
-\r
-static PyObject *slot_nb_power(PyObject *, PyObject *, PyObject *);\r
-\r
-SLOT1BINFULL(slot_nb_power_binary, slot_nb_power,\r
- nb_power, "__pow__", "__rpow__")\r
-\r
-static PyObject *\r
-slot_nb_power(PyObject *self, PyObject *other, PyObject *modulus)\r
-{\r
- static PyObject *pow_str;\r
-\r
- if (modulus == Py_None)\r
- return slot_nb_power_binary(self, other);\r
- /* Three-arg power doesn't use __rpow__. But ternary_op\r
- can call this when the second argument's type uses\r
- slot_nb_power, so check before calling self.__pow__. */\r
- if (Py_TYPE(self)->tp_as_number != NULL &&\r
- Py_TYPE(self)->tp_as_number->nb_power == slot_nb_power) {\r
- return call_method(self, "__pow__", &pow_str,\r
- "(OO)", other, modulus);\r
- }\r
- Py_INCREF(Py_NotImplemented);\r
- return Py_NotImplemented;\r
-}\r
-\r
-SLOT0(slot_nb_negative, "__neg__")\r
-SLOT0(slot_nb_positive, "__pos__")\r
-SLOT0(slot_nb_absolute, "__abs__")\r
-\r
-static int\r
-slot_nb_nonzero(PyObject *self)\r
-{\r
- PyObject *func, *args;\r
- static PyObject *nonzero_str, *len_str;\r
- int result = -1;\r
- int using_len = 0;\r
-\r
- func = lookup_maybe(self, "__nonzero__", &nonzero_str);\r
- if (func == NULL) {\r
- if (PyErr_Occurred())\r
- return -1;\r
- func = lookup_maybe(self, "__len__", &len_str);\r
- if (func == NULL)\r
- return PyErr_Occurred() ? -1 : 1;\r
- using_len = 1;\r
- }\r
- args = PyTuple_New(0);\r
- if (args != NULL) {\r
- PyObject *temp = PyObject_Call(func, args, NULL);\r
- Py_DECREF(args);\r
- if (temp != NULL) {\r
- if (PyInt_CheckExact(temp) || PyBool_Check(temp))\r
- result = PyObject_IsTrue(temp);\r
- else {\r
- PyErr_Format(PyExc_TypeError,\r
- "%s should return "\r
- "bool or int, returned %s",\r
- (using_len ? "__len__"\r
- : "__nonzero__"),\r
- temp->ob_type->tp_name);\r
- result = -1;\r
- }\r
- Py_DECREF(temp);\r
- }\r
- }\r
- Py_DECREF(func);\r
- return result;\r
-}\r
-\r
-\r
-static PyObject *\r
-slot_nb_index(PyObject *self)\r
-{\r
- static PyObject *index_str;\r
- return call_method(self, "__index__", &index_str, "()");\r
-}\r
-\r
-\r
-SLOT0(slot_nb_invert, "__invert__")\r
-SLOT1BIN(slot_nb_lshift, nb_lshift, "__lshift__", "__rlshift__")\r
-SLOT1BIN(slot_nb_rshift, nb_rshift, "__rshift__", "__rrshift__")\r
-SLOT1BIN(slot_nb_and, nb_and, "__and__", "__rand__")\r
-SLOT1BIN(slot_nb_xor, nb_xor, "__xor__", "__rxor__")\r
-SLOT1BIN(slot_nb_or, nb_or, "__or__", "__ror__")\r
-\r
-static int\r
-slot_nb_coerce(PyObject **a, PyObject **b)\r
-{\r
- static PyObject *coerce_str;\r
- PyObject *self = *a, *other = *b;\r
-\r
- if (self->ob_type->tp_as_number != NULL &&\r
- self->ob_type->tp_as_number->nb_coerce == slot_nb_coerce) {\r
- PyObject *r;\r
- r = call_maybe(\r
- self, "__coerce__", &coerce_str, "(O)", other);\r
- if (r == NULL)\r
- return -1;\r
- if (r == Py_NotImplemented) {\r
- Py_DECREF(r);\r
- }\r
- else {\r
- if (!PyTuple_Check(r) || PyTuple_GET_SIZE(r) != 2) {\r
- PyErr_SetString(PyExc_TypeError,\r
- "__coerce__ didn't return a 2-tuple");\r
- Py_DECREF(r);\r
- return -1;\r
- }\r
- *a = PyTuple_GET_ITEM(r, 0);\r
- Py_INCREF(*a);\r
- *b = PyTuple_GET_ITEM(r, 1);\r
- Py_INCREF(*b);\r
- Py_DECREF(r);\r
- return 0;\r
- }\r
- }\r
- if (other->ob_type->tp_as_number != NULL &&\r
- other->ob_type->tp_as_number->nb_coerce == slot_nb_coerce) {\r
- PyObject *r;\r
- r = call_maybe(\r
- other, "__coerce__", &coerce_str, "(O)", self);\r
- if (r == NULL)\r
- return -1;\r
- if (r == Py_NotImplemented) {\r
- Py_DECREF(r);\r
- return 1;\r
- }\r
- if (!PyTuple_Check(r) || PyTuple_GET_SIZE(r) != 2) {\r
- PyErr_SetString(PyExc_TypeError,\r
- "__coerce__ didn't return a 2-tuple");\r
- Py_DECREF(r);\r
- return -1;\r
- }\r
- *a = PyTuple_GET_ITEM(r, 1);\r
- Py_INCREF(*a);\r
- *b = PyTuple_GET_ITEM(r, 0);\r
- Py_INCREF(*b);\r
- Py_DECREF(r);\r
- return 0;\r
- }\r
- return 1;\r
-}\r
-\r
-SLOT0(slot_nb_int, "__int__")\r
-SLOT0(slot_nb_long, "__long__")\r
-SLOT0(slot_nb_float, "__float__")\r
-SLOT0(slot_nb_oct, "__oct__")\r
-SLOT0(slot_nb_hex, "__hex__")\r
-SLOT1(slot_nb_inplace_add, "__iadd__", PyObject *, "O")\r
-SLOT1(slot_nb_inplace_subtract, "__isub__", PyObject *, "O")\r
-SLOT1(slot_nb_inplace_multiply, "__imul__", PyObject *, "O")\r
-SLOT1(slot_nb_inplace_divide, "__idiv__", PyObject *, "O")\r
-SLOT1(slot_nb_inplace_remainder, "__imod__", PyObject *, "O")\r
-/* Can't use SLOT1 here, because nb_inplace_power is ternary */\r
-static PyObject *\r
-slot_nb_inplace_power(PyObject *self, PyObject * arg1, PyObject *arg2)\r
-{\r
- static PyObject *cache_str;\r
- return call_method(self, "__ipow__", &cache_str, "(" "O" ")", arg1);\r
-}\r
-SLOT1(slot_nb_inplace_lshift, "__ilshift__", PyObject *, "O")\r
-SLOT1(slot_nb_inplace_rshift, "__irshift__", PyObject *, "O")\r
-SLOT1(slot_nb_inplace_and, "__iand__", PyObject *, "O")\r
-SLOT1(slot_nb_inplace_xor, "__ixor__", PyObject *, "O")\r
-SLOT1(slot_nb_inplace_or, "__ior__", PyObject *, "O")\r
-SLOT1BIN(slot_nb_floor_divide, nb_floor_divide,\r
- "__floordiv__", "__rfloordiv__")\r
-SLOT1BIN(slot_nb_true_divide, nb_true_divide, "__truediv__", "__rtruediv__")\r
-SLOT1(slot_nb_inplace_floor_divide, "__ifloordiv__", PyObject *, "O")\r
-SLOT1(slot_nb_inplace_true_divide, "__itruediv__", PyObject *, "O")\r
-\r
-static int\r
-half_compare(PyObject *self, PyObject *other)\r
-{\r
- PyObject *func, *args, *res;\r
- static PyObject *cmp_str;\r
- Py_ssize_t c;\r
-\r
- func = lookup_method(self, "__cmp__", &cmp_str);\r
- if (func == NULL) {\r
- PyErr_Clear();\r
- }\r
- else {\r
- args = PyTuple_Pack(1, other);\r
- if (args == NULL)\r
- res = NULL;\r
- else {\r
- res = PyObject_Call(func, args, NULL);\r
- Py_DECREF(args);\r
- }\r
- Py_DECREF(func);\r
- if (res != Py_NotImplemented) {\r
- if (res == NULL)\r
- return -2;\r
- c = PyInt_AsLong(res);\r
- Py_DECREF(res);\r
- if (c == -1 && PyErr_Occurred())\r
- return -2;\r
- return (c < 0) ? -1 : (c > 0) ? 1 : 0;\r
- }\r
- Py_DECREF(res);\r
- }\r
- return 2;\r
-}\r
-\r
-/* This slot is published for the benefit of try_3way_compare in object.c */\r
-int\r
-_PyObject_SlotCompare(PyObject *self, PyObject *other)\r
-{\r
- int c;\r
-\r
- if (Py_TYPE(self)->tp_compare == _PyObject_SlotCompare) {\r
- c = half_compare(self, other);\r
- if (c <= 1)\r
- return c;\r
- }\r
- if (Py_TYPE(other)->tp_compare == _PyObject_SlotCompare) {\r
- c = half_compare(other, self);\r
- if (c < -1)\r
- return -2;\r
- if (c <= 1)\r
- return -c;\r
- }\r
- return (void *)self < (void *)other ? -1 :\r
- (void *)self > (void *)other ? 1 : 0;\r
-}\r
-\r
-static PyObject *\r
-slot_tp_repr(PyObject *self)\r
-{\r
- PyObject *func, *res;\r
- static PyObject *repr_str;\r
-\r
- func = lookup_method(self, "__repr__", &repr_str);\r
- if (func != NULL) {\r
- res = PyEval_CallObject(func, NULL);\r
- Py_DECREF(func);\r
- return res;\r
- }\r
- PyErr_Clear();\r
- return PyString_FromFormat("<%s object at %p>",\r
- Py_TYPE(self)->tp_name, self);\r
-}\r
-\r
-static PyObject *\r
-slot_tp_str(PyObject *self)\r
-{\r
- PyObject *func, *res;\r
- static PyObject *str_str;\r
-\r
- func = lookup_method(self, "__str__", &str_str);\r
- if (func != NULL) {\r
- res = PyEval_CallObject(func, NULL);\r
- Py_DECREF(func);\r
- return res;\r
- }\r
- else {\r
- PyErr_Clear();\r
- return slot_tp_repr(self);\r
- }\r
-}\r
-\r
-static long\r
-slot_tp_hash(PyObject *self)\r
-{\r
- PyObject *func;\r
- static PyObject *hash_str, *eq_str, *cmp_str;\r
- long h;\r
-\r
- func = lookup_method(self, "__hash__", &hash_str);\r
-\r
- if (func != NULL && func != Py_None) {\r
- PyObject *res = PyEval_CallObject(func, NULL);\r
- Py_DECREF(func);\r
- if (res == NULL)\r
- return -1;\r
- if (PyLong_Check(res))\r
- h = PyLong_Type.tp_hash(res);\r
- else\r
- h = PyInt_AsLong(res);\r
- Py_DECREF(res);\r
- }\r
- else {\r
- Py_XDECREF(func); /* may be None */\r
- PyErr_Clear();\r
- func = lookup_method(self, "__eq__", &eq_str);\r
- if (func == NULL) {\r
- PyErr_Clear();\r
- func = lookup_method(self, "__cmp__", &cmp_str);\r
- }\r
- if (func != NULL) {\r
- Py_DECREF(func);\r
- return PyObject_HashNotImplemented(self);\r
- }\r
- PyErr_Clear();\r
- h = _Py_HashPointer((void *)self);\r
- }\r
- if (h == -1 && !PyErr_Occurred())\r
- h = -2;\r
- return h;\r
-}\r
-\r
-static PyObject *\r
-slot_tp_call(PyObject *self, PyObject *args, PyObject *kwds)\r
-{\r
- static PyObject *call_str;\r
- PyObject *meth = lookup_method(self, "__call__", &call_str);\r
- PyObject *res;\r
-\r
- if (meth == NULL)\r
- return NULL;\r
-\r
- res = PyObject_Call(meth, args, kwds);\r
-\r
- Py_DECREF(meth);\r
- return res;\r
-}\r
-\r
-/* There are two slot dispatch functions for tp_getattro.\r
-\r
- - slot_tp_getattro() is used when __getattribute__ is overridden\r
- but no __getattr__ hook is present;\r
-\r
- - slot_tp_getattr_hook() is used when a __getattr__ hook is present.\r
-\r
- The code in update_one_slot() always installs slot_tp_getattr_hook(); this\r
- detects the absence of __getattr__ and then installs the simpler slot if\r
- necessary. */\r
-\r
-static PyObject *\r
-slot_tp_getattro(PyObject *self, PyObject *name)\r
-{\r
- static PyObject *getattribute_str = NULL;\r
- return call_method(self, "__getattribute__", &getattribute_str,\r
- "(O)", name);\r
-}\r
-\r
-static PyObject *\r
-call_attribute(PyObject *self, PyObject *attr, PyObject *name)\r
-{\r
- PyObject *res, *descr = NULL;\r
- descrgetfunc f = Py_TYPE(attr)->tp_descr_get;\r
-\r
- if (f != NULL) {\r
- descr = f(attr, self, (PyObject *)(Py_TYPE(self)));\r
- if (descr == NULL)\r
- return NULL;\r
- else\r
- attr = descr;\r
- }\r
- res = PyObject_CallFunctionObjArgs(attr, name, NULL);\r
- Py_XDECREF(descr);\r
- return res;\r
-}\r
-\r
-static PyObject *\r
-slot_tp_getattr_hook(PyObject *self, PyObject *name)\r
-{\r
- PyTypeObject *tp = Py_TYPE(self);\r
- PyObject *getattr, *getattribute, *res;\r
- static PyObject *getattribute_str = NULL;\r
- static PyObject *getattr_str = NULL;\r
-\r
- if (getattr_str == NULL) {\r
- getattr_str = PyString_InternFromString("__getattr__");\r
- if (getattr_str == NULL)\r
- return NULL;\r
- }\r
- if (getattribute_str == NULL) {\r
- getattribute_str =\r
- PyString_InternFromString("__getattribute__");\r
- if (getattribute_str == NULL)\r
- return NULL;\r
- }\r
- /* speed hack: we could use lookup_maybe, but that would resolve the\r
- method fully for each attribute lookup for classes with\r
- __getattr__, even when the attribute is present. So we use\r
- _PyType_Lookup and create the method only when needed, with\r
- call_attribute. */\r
- getattr = _PyType_Lookup(tp, getattr_str);\r
- if (getattr == NULL) {\r
- /* No __getattr__ hook: use a simpler dispatcher */\r
- tp->tp_getattro = slot_tp_getattro;\r
- return slot_tp_getattro(self, name);\r
- }\r
- Py_INCREF(getattr);\r
- /* speed hack: we could use lookup_maybe, but that would resolve the\r
- method fully for each attribute lookup for classes with\r
- __getattr__, even when self has the default __getattribute__\r
- method. So we use _PyType_Lookup and create the method only when\r
- needed, with call_attribute. */\r
- getattribute = _PyType_Lookup(tp, getattribute_str);\r
- if (getattribute == NULL ||\r
- (Py_TYPE(getattribute) == &PyWrapperDescr_Type &&\r
- ((PyWrapperDescrObject *)getattribute)->d_wrapped ==\r
- (void *)PyObject_GenericGetAttr))\r
- res = PyObject_GenericGetAttr(self, name);\r
- else {\r
- Py_INCREF(getattribute);\r
- res = call_attribute(self, getattribute, name);\r
- Py_DECREF(getattribute);\r
- }\r
- if (res == NULL && PyErr_ExceptionMatches(PyExc_AttributeError)) {\r
- PyErr_Clear();\r
- res = call_attribute(self, getattr, name);\r
- }\r
- Py_DECREF(getattr);\r
- return res;\r
-}\r
-\r
-static int\r
-slot_tp_setattro(PyObject *self, PyObject *name, PyObject *value)\r
-{\r
- PyObject *res;\r
- static PyObject *delattr_str, *setattr_str;\r
-\r
- if (value == NULL)\r
- res = call_method(self, "__delattr__", &delattr_str,\r
- "(O)", name);\r
- else\r
- res = call_method(self, "__setattr__", &setattr_str,\r
- "(OO)", name, value);\r
- if (res == NULL)\r
- return -1;\r
- Py_DECREF(res);\r
- return 0;\r
-}\r
-\r
-static char *name_op[] = {\r
- "__lt__",\r
- "__le__",\r
- "__eq__",\r
- "__ne__",\r
- "__gt__",\r
- "__ge__",\r
-};\r
-\r
-static PyObject *\r
-half_richcompare(PyObject *self, PyObject *other, int op)\r
-{\r
- PyObject *func, *args, *res;\r
- static PyObject *op_str[6];\r
-\r
- func = lookup_method(self, name_op[op], &op_str[op]);\r
- if (func == NULL) {\r
- PyErr_Clear();\r
- Py_INCREF(Py_NotImplemented);\r
- return Py_NotImplemented;\r
- }\r
- args = PyTuple_Pack(1, other);\r
- if (args == NULL)\r
- res = NULL;\r
- else {\r
- res = PyObject_Call(func, args, NULL);\r
- Py_DECREF(args);\r
- }\r
- Py_DECREF(func);\r
- return res;\r
-}\r
-\r
-static PyObject *\r
-slot_tp_richcompare(PyObject *self, PyObject *other, int op)\r
-{\r
- PyObject *res;\r
-\r
- if (Py_TYPE(self)->tp_richcompare == slot_tp_richcompare) {\r
- res = half_richcompare(self, other, op);\r
- if (res != Py_NotImplemented)\r
- return res;\r
- Py_DECREF(res);\r
- }\r
- if (Py_TYPE(other)->tp_richcompare == slot_tp_richcompare) {\r
- res = half_richcompare(other, self, _Py_SwappedOp[op]);\r
- if (res != Py_NotImplemented) {\r
- return res;\r
- }\r
- Py_DECREF(res);\r
- }\r
- Py_INCREF(Py_NotImplemented);\r
- return Py_NotImplemented;\r
-}\r
-\r
-static PyObject *\r
-slot_tp_iter(PyObject *self)\r
-{\r
- PyObject *func, *res;\r
- static PyObject *iter_str, *getitem_str;\r
-\r
- func = lookup_method(self, "__iter__", &iter_str);\r
- if (func != NULL) {\r
- PyObject *args;\r
- args = res = PyTuple_New(0);\r
- if (args != NULL) {\r
- res = PyObject_Call(func, args, NULL);\r
- Py_DECREF(args);\r
- }\r
- Py_DECREF(func);\r
- return res;\r
- }\r
- PyErr_Clear();\r
- func = lookup_method(self, "__getitem__", &getitem_str);\r
- if (func == NULL) {\r
- PyErr_Format(PyExc_TypeError,\r
- "'%.200s' object is not iterable",\r
- Py_TYPE(self)->tp_name);\r
- return NULL;\r
- }\r
- Py_DECREF(func);\r
- return PySeqIter_New(self);\r
-}\r
-\r
-static PyObject *\r
-slot_tp_iternext(PyObject *self)\r
-{\r
- static PyObject *next_str;\r
- return call_method(self, "next", &next_str, "()");\r
-}\r
-\r
-static PyObject *\r
-slot_tp_descr_get(PyObject *self, PyObject *obj, PyObject *type)\r
-{\r
- PyTypeObject *tp = Py_TYPE(self);\r
- PyObject *get;\r
- static PyObject *get_str = NULL;\r
-\r
- if (get_str == NULL) {\r
- get_str = PyString_InternFromString("__get__");\r
- if (get_str == NULL)\r
- return NULL;\r
- }\r
- get = _PyType_Lookup(tp, get_str);\r
- if (get == NULL) {\r
- /* Avoid further slowdowns */\r
- if (tp->tp_descr_get == slot_tp_descr_get)\r
- tp->tp_descr_get = NULL;\r
- Py_INCREF(self);\r
- return self;\r
- }\r
- if (obj == NULL)\r
- obj = Py_None;\r
- if (type == NULL)\r
- type = Py_None;\r
- return PyObject_CallFunctionObjArgs(get, self, obj, type, NULL);\r
-}\r
-\r
-static int\r
-slot_tp_descr_set(PyObject *self, PyObject *target, PyObject *value)\r
-{\r
- PyObject *res;\r
- static PyObject *del_str, *set_str;\r
-\r
- if (value == NULL)\r
- res = call_method(self, "__delete__", &del_str,\r
- "(O)", target);\r
- else\r
- res = call_method(self, "__set__", &set_str,\r
- "(OO)", target, value);\r
- if (res == NULL)\r
- return -1;\r
- Py_DECREF(res);\r
- return 0;\r
-}\r
-\r
-static int\r
-slot_tp_init(PyObject *self, PyObject *args, PyObject *kwds)\r
-{\r
- static PyObject *init_str;\r
- PyObject *meth = lookup_method(self, "__init__", &init_str);\r
- PyObject *res;\r
-\r
- if (meth == NULL)\r
- return -1;\r
- res = PyObject_Call(meth, args, kwds);\r
- Py_DECREF(meth);\r
- if (res == NULL)\r
- return -1;\r
- if (res != Py_None) {\r
- PyErr_Format(PyExc_TypeError,\r
- "__init__() should return None, not '%.200s'",\r
- Py_TYPE(res)->tp_name);\r
- Py_DECREF(res);\r
- return -1;\r
- }\r
- Py_DECREF(res);\r
- return 0;\r
-}\r
-\r
-static PyObject *\r
-slot_tp_new(PyTypeObject *type, PyObject *args, PyObject *kwds)\r
-{\r
- static PyObject *new_str;\r
- PyObject *func;\r
- PyObject *newargs, *x;\r
- Py_ssize_t i, n;\r
-\r
- if (new_str == NULL) {\r
- new_str = PyString_InternFromString("__new__");\r
- if (new_str == NULL)\r
- return NULL;\r
- }\r
- func = PyObject_GetAttr((PyObject *)type, new_str);\r
- if (func == NULL)\r
- return NULL;\r
- assert(PyTuple_Check(args));\r
- n = PyTuple_GET_SIZE(args);\r
- newargs = PyTuple_New(n+1);\r
- if (newargs == NULL)\r
- return NULL;\r
- Py_INCREF(type);\r
- PyTuple_SET_ITEM(newargs, 0, (PyObject *)type);\r
- for (i = 0; i < n; i++) {\r
- x = PyTuple_GET_ITEM(args, i);\r
- Py_INCREF(x);\r
- PyTuple_SET_ITEM(newargs, i+1, x);\r
- }\r
- x = PyObject_Call(func, newargs, kwds);\r
- Py_DECREF(newargs);\r
- Py_DECREF(func);\r
- return x;\r
-}\r
-\r
-static void\r
-slot_tp_del(PyObject *self)\r
-{\r
- static PyObject *del_str = NULL;\r
- PyObject *del, *res;\r
- PyObject *error_type, *error_value, *error_traceback;\r
-\r
- /* Temporarily resurrect the object. */\r
- assert(self->ob_refcnt == 0);\r
- self->ob_refcnt = 1;\r
-\r
- /* Save the current exception, if any. */\r
- PyErr_Fetch(&error_type, &error_value, &error_traceback);\r
-\r
- /* Execute __del__ method, if any. */\r
- del = lookup_maybe(self, "__del__", &del_str);\r
- if (del != NULL) {\r
- res = PyEval_CallObject(del, NULL);\r
- if (res == NULL)\r
- PyErr_WriteUnraisable(del);\r
- else\r
- Py_DECREF(res);\r
- Py_DECREF(del);\r
- }\r
-\r
- /* Restore the saved exception. */\r
- PyErr_Restore(error_type, error_value, error_traceback);\r
-\r
- /* Undo the temporary resurrection; can't use DECREF here, it would\r
- * cause a recursive call.\r
- */\r
- assert(self->ob_refcnt > 0);\r
- if (--self->ob_refcnt == 0)\r
- return; /* this is the normal path out */\r
-\r
- /* __del__ resurrected it! Make it look like the original Py_DECREF\r
- * never happened.\r
- */\r
- {\r
- Py_ssize_t refcnt = self->ob_refcnt;\r
- _Py_NewReference(self);\r
- self->ob_refcnt = refcnt;\r
- }\r
- assert(!PyType_IS_GC(Py_TYPE(self)) ||\r
- _Py_AS_GC(self)->gc.gc_refs != _PyGC_REFS_UNTRACKED);\r
- /* If Py_REF_DEBUG, _Py_NewReference bumped _Py_RefTotal, so\r
- * we need to undo that. */\r
- _Py_DEC_REFTOTAL;\r
- /* If Py_TRACE_REFS, _Py_NewReference re-added self to the object\r
- * chain, so no more to do there.\r
- * If COUNT_ALLOCS, the original decref bumped tp_frees, and\r
- * _Py_NewReference bumped tp_allocs: both of those need to be\r
- * undone.\r
- */\r
-#ifdef COUNT_ALLOCS\r
- --Py_TYPE(self)->tp_frees;\r
- --Py_TYPE(self)->tp_allocs;\r
-#endif\r
-}\r
-\r
-\r
-/*\r
-Table mapping __foo__ names to tp_foo offsets and slot_tp_foo wrapper functions.\r
-\r
-The table is ordered by offsets relative to the 'PyHeapTypeObject' structure,\r
-which incorporates the additional structures used for numbers, sequences and\r
-mappings. Note that multiple names may map to the same slot (e.g. __eq__,\r
-__ne__ etc. all map to tp_richcompare) and one name may map to multiple slots\r
-(e.g. __str__ affects tp_str as well as tp_repr). The table is terminated with\r
-an all-zero entry. (This table is further initialized in init_slotdefs().)\r
-*/\r
-\r
-typedef struct wrapperbase slotdef;\r
-\r
-#undef TPSLOT\r
-#undef FLSLOT\r
-#undef ETSLOT\r
-#undef SQSLOT\r
-#undef MPSLOT\r
-#undef NBSLOT\r
-#undef UNSLOT\r
-#undef IBSLOT\r
-#undef BINSLOT\r
-#undef RBINSLOT\r
-\r
-#define TPSLOT(NAME, SLOT, FUNCTION, WRAPPER, DOC) \\r
- {NAME, offsetof(PyTypeObject, SLOT), (void *)(FUNCTION), WRAPPER, \\r
- PyDoc_STR(DOC)}\r
-#define FLSLOT(NAME, SLOT, FUNCTION, WRAPPER, DOC, FLAGS) \\r
- {NAME, offsetof(PyTypeObject, SLOT), (void *)(FUNCTION), WRAPPER, \\r
- PyDoc_STR(DOC), FLAGS}\r
-#define ETSLOT(NAME, SLOT, FUNCTION, WRAPPER, DOC) \\r
- {NAME, offsetof(PyHeapTypeObject, SLOT), (void *)(FUNCTION), WRAPPER, \\r
- PyDoc_STR(DOC)}\r
-#define SQSLOT(NAME, SLOT, FUNCTION, WRAPPER, DOC) \\r
- ETSLOT(NAME, as_sequence.SLOT, FUNCTION, WRAPPER, DOC)\r
-#define MPSLOT(NAME, SLOT, FUNCTION, WRAPPER, DOC) \\r
- ETSLOT(NAME, as_mapping.SLOT, FUNCTION, WRAPPER, DOC)\r
-#define NBSLOT(NAME, SLOT, FUNCTION, WRAPPER, DOC) \\r
- ETSLOT(NAME, as_number.SLOT, FUNCTION, WRAPPER, DOC)\r
-#define UNSLOT(NAME, SLOT, FUNCTION, WRAPPER, DOC) \\r
- ETSLOT(NAME, as_number.SLOT, FUNCTION, WRAPPER, \\r
- "x." NAME "() <==> " DOC)\r
-#define IBSLOT(NAME, SLOT, FUNCTION, WRAPPER, DOC) \\r
- ETSLOT(NAME, as_number.SLOT, FUNCTION, WRAPPER, \\r
- "x." NAME "(y) <==> x" DOC "y")\r
-#define BINSLOT(NAME, SLOT, FUNCTION, DOC) \\r
- ETSLOT(NAME, as_number.SLOT, FUNCTION, wrap_binaryfunc_l, \\r
- "x." NAME "(y) <==> x" DOC "y")\r
-#define RBINSLOT(NAME, SLOT, FUNCTION, DOC) \\r
- ETSLOT(NAME, as_number.SLOT, FUNCTION, wrap_binaryfunc_r, \\r
- "x." NAME "(y) <==> y" DOC "x")\r
-#define BINSLOTNOTINFIX(NAME, SLOT, FUNCTION, DOC) \\r
- ETSLOT(NAME, as_number.SLOT, FUNCTION, wrap_binaryfunc_l, \\r
- "x." NAME "(y) <==> " DOC)\r
-#define RBINSLOTNOTINFIX(NAME, SLOT, FUNCTION, DOC) \\r
- ETSLOT(NAME, as_number.SLOT, FUNCTION, wrap_binaryfunc_r, \\r
- "x." NAME "(y) <==> " DOC)\r
-\r
-static slotdef slotdefs[] = {\r
- TPSLOT("__str__", tp_print, NULL, NULL, ""),\r
- TPSLOT("__repr__", tp_print, NULL, NULL, ""),\r
- TPSLOT("__getattribute__", tp_getattr, NULL, NULL, ""),\r
- TPSLOT("__getattr__", tp_getattr, NULL, NULL, ""),\r
- TPSLOT("__setattr__", tp_setattr, NULL, NULL, ""),\r
- TPSLOT("__delattr__", tp_setattr, NULL, NULL, ""),\r
- TPSLOT("__cmp__", tp_compare, _PyObject_SlotCompare, wrap_cmpfunc,\r
- "x.__cmp__(y) <==> cmp(x,y)"),\r
- TPSLOT("__repr__", tp_repr, slot_tp_repr, wrap_unaryfunc,\r
- "x.__repr__() <==> repr(x)"),\r
- TPSLOT("__hash__", tp_hash, slot_tp_hash, wrap_hashfunc,\r
- "x.__hash__() <==> hash(x)"),\r
- FLSLOT("__call__", tp_call, slot_tp_call, (wrapperfunc)wrap_call,\r
- "x.__call__(...) <==> x(...)", PyWrapperFlag_KEYWORDS),\r
- TPSLOT("__str__", tp_str, slot_tp_str, wrap_unaryfunc,\r
- "x.__str__() <==> str(x)"),\r
- TPSLOT("__getattribute__", tp_getattro, slot_tp_getattr_hook,\r
- wrap_binaryfunc, "x.__getattribute__('name') <==> x.name"),\r
- TPSLOT("__getattr__", tp_getattro, slot_tp_getattr_hook, NULL, ""),\r
- TPSLOT("__setattr__", tp_setattro, slot_tp_setattro, wrap_setattr,\r
- "x.__setattr__('name', value) <==> x.name = value"),\r
- TPSLOT("__delattr__", tp_setattro, slot_tp_setattro, wrap_delattr,\r
- "x.__delattr__('name') <==> del x.name"),\r
- TPSLOT("__lt__", tp_richcompare, slot_tp_richcompare, richcmp_lt,\r
- "x.__lt__(y) <==> x<y"),\r
- TPSLOT("__le__", tp_richcompare, slot_tp_richcompare, richcmp_le,\r
- "x.__le__(y) <==> x<=y"),\r
- TPSLOT("__eq__", tp_richcompare, slot_tp_richcompare, richcmp_eq,\r
- "x.__eq__(y) <==> x==y"),\r
- TPSLOT("__ne__", tp_richcompare, slot_tp_richcompare, richcmp_ne,\r
- "x.__ne__(y) <==> x!=y"),\r
- TPSLOT("__gt__", tp_richcompare, slot_tp_richcompare, richcmp_gt,\r
- "x.__gt__(y) <==> x>y"),\r
- TPSLOT("__ge__", tp_richcompare, slot_tp_richcompare, richcmp_ge,\r
- "x.__ge__(y) <==> x>=y"),\r
- TPSLOT("__iter__", tp_iter, slot_tp_iter, wrap_unaryfunc,\r
- "x.__iter__() <==> iter(x)"),\r
- TPSLOT("next", tp_iternext, slot_tp_iternext, wrap_next,\r
- "x.next() -> the next value, or raise StopIteration"),\r
- TPSLOT("__get__", tp_descr_get, slot_tp_descr_get, wrap_descr_get,\r
- "descr.__get__(obj[, type]) -> value"),\r
- TPSLOT("__set__", tp_descr_set, slot_tp_descr_set, wrap_descr_set,\r
- "descr.__set__(obj, value)"),\r
- TPSLOT("__delete__", tp_descr_set, slot_tp_descr_set,\r
- wrap_descr_delete, "descr.__delete__(obj)"),\r
- FLSLOT("__init__", tp_init, slot_tp_init, (wrapperfunc)wrap_init,\r
- "x.__init__(...) initializes x; "\r
- "see help(type(x)) for signature",\r
- PyWrapperFlag_KEYWORDS),\r
- TPSLOT("__new__", tp_new, slot_tp_new, NULL, ""),\r
- TPSLOT("__del__", tp_del, slot_tp_del, NULL, ""),\r
- BINSLOT("__add__", nb_add, slot_nb_add,\r
- "+"),\r
- RBINSLOT("__radd__", nb_add, slot_nb_add,\r
- "+"),\r
- BINSLOT("__sub__", nb_subtract, slot_nb_subtract,\r
- "-"),\r
- RBINSLOT("__rsub__", nb_subtract, slot_nb_subtract,\r
- "-"),\r
- BINSLOT("__mul__", nb_multiply, slot_nb_multiply,\r
- "*"),\r
- RBINSLOT("__rmul__", nb_multiply, slot_nb_multiply,\r
- "*"),\r
- BINSLOT("__div__", nb_divide, slot_nb_divide,\r
- "/"),\r
- RBINSLOT("__rdiv__", nb_divide, slot_nb_divide,\r
- "/"),\r
- BINSLOT("__mod__", nb_remainder, slot_nb_remainder,\r
- "%"),\r
- RBINSLOT("__rmod__", nb_remainder, slot_nb_remainder,\r
- "%"),\r
- BINSLOTNOTINFIX("__divmod__", nb_divmod, slot_nb_divmod,\r
- "divmod(x, y)"),\r
- RBINSLOTNOTINFIX("__rdivmod__", nb_divmod, slot_nb_divmod,\r
- "divmod(y, x)"),\r
- NBSLOT("__pow__", nb_power, slot_nb_power, wrap_ternaryfunc,\r
- "x.__pow__(y[, z]) <==> pow(x, y[, z])"),\r
- NBSLOT("__rpow__", nb_power, slot_nb_power, wrap_ternaryfunc_r,\r
- "y.__rpow__(x[, z]) <==> pow(x, y[, z])"),\r
- UNSLOT("__neg__", nb_negative, slot_nb_negative, wrap_unaryfunc, "-x"),\r
- UNSLOT("__pos__", nb_positive, slot_nb_positive, wrap_unaryfunc, "+x"),\r
- UNSLOT("__abs__", nb_absolute, slot_nb_absolute, wrap_unaryfunc,\r
- "abs(x)"),\r
- UNSLOT("__nonzero__", nb_nonzero, slot_nb_nonzero, wrap_inquirypred,\r
- "x != 0"),\r
- UNSLOT("__invert__", nb_invert, slot_nb_invert, wrap_unaryfunc, "~x"),\r
- BINSLOT("__lshift__", nb_lshift, slot_nb_lshift, "<<"),\r
- RBINSLOT("__rlshift__", nb_lshift, slot_nb_lshift, "<<"),\r
- BINSLOT("__rshift__", nb_rshift, slot_nb_rshift, ">>"),\r
- RBINSLOT("__rrshift__", nb_rshift, slot_nb_rshift, ">>"),\r
- BINSLOT("__and__", nb_and, slot_nb_and, "&"),\r
- RBINSLOT("__rand__", nb_and, slot_nb_and, "&"),\r
- BINSLOT("__xor__", nb_xor, slot_nb_xor, "^"),\r
- RBINSLOT("__rxor__", nb_xor, slot_nb_xor, "^"),\r
- BINSLOT("__or__", nb_or, slot_nb_or, "|"),\r
- RBINSLOT("__ror__", nb_or, slot_nb_or, "|"),\r
- NBSLOT("__coerce__", nb_coerce, slot_nb_coerce, wrap_coercefunc,\r
- "x.__coerce__(y) <==> coerce(x, y)"),\r
- UNSLOT("__int__", nb_int, slot_nb_int, wrap_unaryfunc,\r
- "int(x)"),\r
- UNSLOT("__long__", nb_long, slot_nb_long, wrap_unaryfunc,\r
- "long(x)"),\r
- UNSLOT("__float__", nb_float, slot_nb_float, wrap_unaryfunc,\r
- "float(x)"),\r
- UNSLOT("__oct__", nb_oct, slot_nb_oct, wrap_unaryfunc,\r
- "oct(x)"),\r
- UNSLOT("__hex__", nb_hex, slot_nb_hex, wrap_unaryfunc,\r
- "hex(x)"),\r
- IBSLOT("__iadd__", nb_inplace_add, slot_nb_inplace_add,\r
- wrap_binaryfunc, "+="),\r
- IBSLOT("__isub__", nb_inplace_subtract, slot_nb_inplace_subtract,\r
- wrap_binaryfunc, "-="),\r
- IBSLOT("__imul__", nb_inplace_multiply, slot_nb_inplace_multiply,\r
- wrap_binaryfunc, "*="),\r
- IBSLOT("__idiv__", nb_inplace_divide, slot_nb_inplace_divide,\r
- wrap_binaryfunc, "/="),\r
- IBSLOT("__imod__", nb_inplace_remainder, slot_nb_inplace_remainder,\r
- wrap_binaryfunc, "%="),\r
- IBSLOT("__ipow__", nb_inplace_power, slot_nb_inplace_power,\r
- wrap_binaryfunc, "**="),\r
- IBSLOT("__ilshift__", nb_inplace_lshift, slot_nb_inplace_lshift,\r
- wrap_binaryfunc, "<<="),\r
- IBSLOT("__irshift__", nb_inplace_rshift, slot_nb_inplace_rshift,\r
- wrap_binaryfunc, ">>="),\r
- IBSLOT("__iand__", nb_inplace_and, slot_nb_inplace_and,\r
- wrap_binaryfunc, "&="),\r
- IBSLOT("__ixor__", nb_inplace_xor, slot_nb_inplace_xor,\r
- wrap_binaryfunc, "^="),\r
- IBSLOT("__ior__", nb_inplace_or, slot_nb_inplace_or,\r
- wrap_binaryfunc, "|="),\r
- BINSLOT("__floordiv__", nb_floor_divide, slot_nb_floor_divide, "//"),\r
- RBINSLOT("__rfloordiv__", nb_floor_divide, slot_nb_floor_divide, "//"),\r
- BINSLOT("__truediv__", nb_true_divide, slot_nb_true_divide, "/"),\r
- RBINSLOT("__rtruediv__", nb_true_divide, slot_nb_true_divide, "/"),\r
- IBSLOT("__ifloordiv__", nb_inplace_floor_divide,\r
- slot_nb_inplace_floor_divide, wrap_binaryfunc, "//="),\r
- IBSLOT("__itruediv__", nb_inplace_true_divide,\r
- slot_nb_inplace_true_divide, wrap_binaryfunc, "/="),\r
- NBSLOT("__index__", nb_index, slot_nb_index, wrap_unaryfunc,\r
- "x[y:z] <==> x[y.__index__():z.__index__()]"),\r
- MPSLOT("__len__", mp_length, slot_mp_length, wrap_lenfunc,\r
- "x.__len__() <==> len(x)"),\r
- MPSLOT("__getitem__", mp_subscript, slot_mp_subscript,\r
- wrap_binaryfunc,\r
- "x.__getitem__(y) <==> x[y]"),\r
- MPSLOT("__setitem__", mp_ass_subscript, slot_mp_ass_subscript,\r
- wrap_objobjargproc,\r
- "x.__setitem__(i, y) <==> x[i]=y"),\r
- MPSLOT("__delitem__", mp_ass_subscript, slot_mp_ass_subscript,\r
- wrap_delitem,\r
- "x.__delitem__(y) <==> del x[y]"),\r
- SQSLOT("__len__", sq_length, slot_sq_length, wrap_lenfunc,\r
- "x.__len__() <==> len(x)"),\r
- /* Heap types defining __add__/__mul__ have sq_concat/sq_repeat == NULL.\r
- The logic in abstract.c always falls back to nb_add/nb_multiply in\r
- this case. Defining both the nb_* and the sq_* slots to call the\r
- user-defined methods has unexpected side-effects, as shown by\r
- test_descr.notimplemented() */\r
- SQSLOT("__add__", sq_concat, NULL, wrap_binaryfunc,\r
- "x.__add__(y) <==> x+y"),\r
- SQSLOT("__mul__", sq_repeat, NULL, wrap_indexargfunc,\r
- "x.__mul__(n) <==> x*n"),\r
- SQSLOT("__rmul__", sq_repeat, NULL, wrap_indexargfunc,\r
- "x.__rmul__(n) <==> n*x"),\r
- SQSLOT("__getitem__", sq_item, slot_sq_item, wrap_sq_item,\r
- "x.__getitem__(y) <==> x[y]"),\r
- SQSLOT("__getslice__", sq_slice, slot_sq_slice, wrap_ssizessizeargfunc,\r
- "x.__getslice__(i, j) <==> x[i:j]\n\\r
- \n\\r
- Use of negative indices is not supported."),\r
- SQSLOT("__setitem__", sq_ass_item, slot_sq_ass_item, wrap_sq_setitem,\r
- "x.__setitem__(i, y) <==> x[i]=y"),\r
- SQSLOT("__delitem__", sq_ass_item, slot_sq_ass_item, wrap_sq_delitem,\r
- "x.__delitem__(y) <==> del x[y]"),\r
- SQSLOT("__setslice__", sq_ass_slice, slot_sq_ass_slice,\r
- wrap_ssizessizeobjargproc,\r
- "x.__setslice__(i, j, y) <==> x[i:j]=y\n\\r
- \n\\r
- Use of negative indices is not supported."),\r
- SQSLOT("__delslice__", sq_ass_slice, slot_sq_ass_slice, wrap_delslice,\r
- "x.__delslice__(i, j) <==> del x[i:j]\n\\r
- \n\\r
- Use of negative indices is not supported."),\r
- SQSLOT("__contains__", sq_contains, slot_sq_contains, wrap_objobjproc,\r
- "x.__contains__(y) <==> y in x"),\r
- SQSLOT("__iadd__", sq_inplace_concat, NULL,\r
- wrap_binaryfunc, "x.__iadd__(y) <==> x+=y"),\r
- SQSLOT("__imul__", sq_inplace_repeat, NULL,\r
- wrap_indexargfunc, "x.__imul__(y) <==> x*=y"),\r
- {NULL}\r
-};\r
-\r
-/* Given a type pointer and an offset gotten from a slotdef entry, return a\r
- pointer to the actual slot. This is not quite the same as simply adding\r
- the offset to the type pointer, since it takes care to indirect through the\r
- proper indirection pointer (as_buffer, etc.); it returns NULL if the\r
- indirection pointer is NULL. */\r
-static void **\r
-slotptr(PyTypeObject *type, int ioffset)\r
-{\r
- char *ptr;\r
- long offset = ioffset;\r
-\r
- /* Note: this depends on the order of the members of PyHeapTypeObject! */\r
- assert(offset >= 0);\r
- assert((size_t)offset < offsetof(PyHeapTypeObject, as_buffer));\r
- if ((size_t)offset >= offsetof(PyHeapTypeObject, as_sequence)) {\r
- ptr = (char *)type->tp_as_sequence;\r
- offset -= offsetof(PyHeapTypeObject, as_sequence);\r
- }\r
- else if ((size_t)offset >= offsetof(PyHeapTypeObject, as_mapping)) {\r
- ptr = (char *)type->tp_as_mapping;\r
- offset -= offsetof(PyHeapTypeObject, as_mapping);\r
- }\r
- else if ((size_t)offset >= offsetof(PyHeapTypeObject, as_number)) {\r
- ptr = (char *)type->tp_as_number;\r
- offset -= offsetof(PyHeapTypeObject, as_number);\r
- }\r
- else {\r
- ptr = (char *)type;\r
- }\r
- if (ptr != NULL)\r
- ptr += offset;\r
- return (void **)ptr;\r
-}\r
-\r
-/* Length of array of slotdef pointers used to store slots with the\r
- same __name__. There should be at most MAX_EQUIV-1 slotdef entries with\r
- the same __name__, for any __name__. Since that's a static property, it is\r
- appropriate to declare fixed-size arrays for this. */\r
-#define MAX_EQUIV 10\r
-\r
-/* Return a slot pointer for a given name, but ONLY if the attribute has\r
- exactly one slot function. The name must be an interned string. */\r
-static void **\r
-resolve_slotdups(PyTypeObject *type, PyObject *name)\r
-{\r
- /* XXX Maybe this could be optimized more -- but is it worth it? */\r
-\r
- /* pname and ptrs act as a little cache */\r
- static PyObject *pname;\r
- static slotdef *ptrs[MAX_EQUIV];\r
- slotdef *p, **pp;\r
- void **res, **ptr;\r
-\r
- if (pname != name) {\r
- /* Collect all slotdefs that match name into ptrs. */\r
- pname = name;\r
- pp = ptrs;\r
- for (p = slotdefs; p->name_strobj; p++) {\r
- if (p->name_strobj == name)\r
- *pp++ = p;\r
- }\r
- *pp = NULL;\r
- }\r
-\r
- /* Look in all matching slots of the type; if exactly one of these has\r
- a filled-in slot, return its value. Otherwise return NULL. */\r
- res = NULL;\r
- for (pp = ptrs; *pp; pp++) {\r
- ptr = slotptr(type, (*pp)->offset);\r
- if (ptr == NULL || *ptr == NULL)\r
- continue;\r
- if (res != NULL)\r
- return NULL;\r
- res = ptr;\r
- }\r
- return res;\r
-}\r
-\r
-/* Common code for update_slots_callback() and fixup_slot_dispatchers(). This\r
- does some incredibly complex thinking and then sticks something into the\r
- slot. (It sees if the adjacent slotdefs for the same slot have conflicting\r
- interests, and then stores a generic wrapper or a specific function into\r
- the slot.) Return a pointer to the next slotdef with a different offset,\r
- because that's convenient for fixup_slot_dispatchers(). */\r
-static slotdef *\r
-update_one_slot(PyTypeObject *type, slotdef *p)\r
-{\r
- PyObject *descr;\r
- PyWrapperDescrObject *d;\r
- void *generic = NULL, *specific = NULL;\r
- int use_generic = 0;\r
- int offset = p->offset;\r
- void **ptr = slotptr(type, offset);\r
-\r
- if (ptr == NULL) {\r
- do {\r
- ++p;\r
- } while (p->offset == offset);\r
- return p;\r
- }\r
- do {\r
- descr = _PyType_Lookup(type, p->name_strobj);\r
- if (descr == NULL) {\r
- if (ptr == (void**)&type->tp_iternext) {\r
- specific = _PyObject_NextNotImplemented;\r
- }\r
- continue;\r
- }\r
- if (Py_TYPE(descr) == &PyWrapperDescr_Type &&\r
- ((PyWrapperDescrObject *)descr)->d_base->name_strobj == p->name_strobj) {\r
- void **tptr = resolve_slotdups(type, p->name_strobj);\r
- if (tptr == NULL || tptr == ptr)\r
- generic = p->function;\r
- d = (PyWrapperDescrObject *)descr;\r
- if (d->d_base->wrapper == p->wrapper &&\r
- PyType_IsSubtype(type, d->d_type))\r
- {\r
- if (specific == NULL ||\r
- specific == d->d_wrapped)\r
- specific = d->d_wrapped;\r
- else\r
- use_generic = 1;\r
- }\r
- }\r
- else if (Py_TYPE(descr) == &PyCFunction_Type &&\r
- PyCFunction_GET_FUNCTION(descr) ==\r
- (PyCFunction)tp_new_wrapper &&\r
- ptr == (void**)&type->tp_new)\r
- {\r
- /* The __new__ wrapper is not a wrapper descriptor,\r
- so must be special-cased differently.\r
- If we don't do this, creating an instance will\r
- always use slot_tp_new which will look up\r
- __new__ in the MRO which will call tp_new_wrapper\r
- which will look through the base classes looking\r
- for a static base and call its tp_new (usually\r
- PyType_GenericNew), after performing various\r
- sanity checks and constructing a new argument\r
- list. Cut all that nonsense short -- this speeds\r
- up instance creation tremendously. */\r
- specific = (void *)type->tp_new;\r
- /* XXX I'm not 100% sure that there isn't a hole\r
- in this reasoning that requires additional\r
- sanity checks. I'll buy the first person to\r
- point out a bug in this reasoning a beer. */\r
- }\r
- else if (descr == Py_None &&\r
- ptr == (void**)&type->tp_hash) {\r
- /* We specifically allow __hash__ to be set to None\r
- to prevent inheritance of the default\r
- implementation from object.__hash__ */\r
- specific = PyObject_HashNotImplemented;\r
- }\r
- else {\r
- use_generic = 1;\r
- generic = p->function;\r
- }\r
- } while ((++p)->offset == offset);\r
- if (specific && !use_generic)\r
- *ptr = specific;\r
- else\r
- *ptr = generic;\r
- return p;\r
-}\r
-\r
-/* In the type, update the slots whose slotdefs are gathered in the pp array.\r
- This is a callback for update_subclasses(). */\r
-static int\r
-update_slots_callback(PyTypeObject *type, void *data)\r
-{\r
- slotdef **pp = (slotdef **)data;\r
-\r
- for (; *pp; pp++)\r
- update_one_slot(type, *pp);\r
- return 0;\r
-}\r
-\r
-/* Initialize the slotdefs table by adding interned string objects for the\r
- names and sorting the entries. */\r
-static void\r
-init_slotdefs(void)\r
-{\r
- slotdef *p;\r
- static int initialized = 0;\r
-\r
- if (initialized)\r
- return;\r
- for (p = slotdefs; p->name; p++) {\r
- /* Slots must be ordered by their offset in the PyHeapTypeObject. */\r
- assert(!p[1].name || p->offset <= p[1].offset);\r
- p->name_strobj = PyString_InternFromString(p->name);\r
- if (!p->name_strobj)\r
- Py_FatalError("Out of memory interning slotdef names");\r
- }\r
- initialized = 1;\r
-}\r
-\r
-/* Update the slots after assignment to a class (type) attribute. */\r
-static int\r
-update_slot(PyTypeObject *type, PyObject *name)\r
-{\r
- slotdef *ptrs[MAX_EQUIV];\r
- slotdef *p;\r
- slotdef **pp;\r
- int offset;\r
-\r
- /* Clear the VALID_VERSION flag of 'type' and all its\r
- subclasses. This could possibly be unified with the\r
- update_subclasses() recursion below, but carefully:\r
- they each have their own conditions on which to stop\r
- recursing into subclasses. */\r
- PyType_Modified(type);\r
-\r
- init_slotdefs();\r
- pp = ptrs;\r
- for (p = slotdefs; p->name; p++) {\r
- /* XXX assume name is interned! */\r
- if (p->name_strobj == name)\r
- *pp++ = p;\r
- }\r
- *pp = NULL;\r
- for (pp = ptrs; *pp; pp++) {\r
- p = *pp;\r
- offset = p->offset;\r
- while (p > slotdefs && (p-1)->offset == offset)\r
- --p;\r
- *pp = p;\r
- }\r
- if (ptrs[0] == NULL)\r
- return 0; /* Not an attribute that affects any slots */\r
- return update_subclasses(type, name,\r
- update_slots_callback, (void *)ptrs);\r
-}\r
-\r
-/* Store the proper functions in the slot dispatches at class (type)\r
- definition time, based upon which operations the class overrides in its\r
- dict. */\r
-static void\r
-fixup_slot_dispatchers(PyTypeObject *type)\r
-{\r
- slotdef *p;\r
-\r
- init_slotdefs();\r
- for (p = slotdefs; p->name; )\r
- p = update_one_slot(type, p);\r
-}\r
-\r
-static void\r
-update_all_slots(PyTypeObject* type)\r
-{\r
- slotdef *p;\r
-\r
- init_slotdefs();\r
- for (p = slotdefs; p->name; p++) {\r
- /* update_slot returns int but can't actually fail */\r
- update_slot(type, p->name_strobj);\r
- }\r
-}\r
-\r
-/* recurse_down_subclasses() and update_subclasses() are mutually\r
- recursive functions to call a callback for all subclasses,\r
- but refraining from recursing into subclasses that define 'name'. */\r
-\r
-static int\r
-update_subclasses(PyTypeObject *type, PyObject *name,\r
- update_callback callback, void *data)\r
-{\r
- if (callback(type, data) < 0)\r
- return -1;\r
- return recurse_down_subclasses(type, name, callback, data);\r
-}\r
-\r
-static int\r
-recurse_down_subclasses(PyTypeObject *type, PyObject *name,\r
- update_callback callback, void *data)\r
-{\r
- PyTypeObject *subclass;\r
- PyObject *ref, *subclasses, *dict;\r
- Py_ssize_t i, n;\r
-\r
- subclasses = type->tp_subclasses;\r
- if (subclasses == NULL)\r
- return 0;\r
- assert(PyList_Check(subclasses));\r
- n = PyList_GET_SIZE(subclasses);\r
- for (i = 0; i < n; i++) {\r
- ref = PyList_GET_ITEM(subclasses, i);\r
- assert(PyWeakref_CheckRef(ref));\r
- subclass = (PyTypeObject *)PyWeakref_GET_OBJECT(ref);\r
- assert(subclass != NULL);\r
- if ((PyObject *)subclass == Py_None)\r
- continue;\r
- assert(PyType_Check(subclass));\r
- /* Avoid recursing down into unaffected classes */\r
- dict = subclass->tp_dict;\r
- if (dict != NULL && PyDict_Check(dict) &&\r
- PyDict_GetItem(dict, name) != NULL)\r
- continue;\r
- if (update_subclasses(subclass, name, callback, data) < 0)\r
- return -1;\r
- }\r
- return 0;\r
-}\r
-\r
-/* This function is called by PyType_Ready() to populate the type's\r
- dictionary with method descriptors for function slots. For each\r
- function slot (like tp_repr) that's defined in the type, one or more\r
- corresponding descriptors are added in the type's tp_dict dictionary\r
- under the appropriate name (like __repr__). Some function slots\r
- cause more than one descriptor to be added (for example, the nb_add\r
- slot adds both __add__ and __radd__ descriptors) and some function\r
- slots compete for the same descriptor (for example both sq_item and\r
- mp_subscript generate a __getitem__ descriptor).\r
-\r
- In the latter case, the first slotdef entry encountered wins. Since\r
- slotdef entries are sorted by the offset of the slot in the\r
- PyHeapTypeObject, this gives us some control over disambiguating\r
- between competing slots: the members of PyHeapTypeObject are listed\r
- from most general to least general, so the most general slot is\r
- preferred. In particular, because as_mapping comes before as_sequence,\r
- for a type that defines both mp_subscript and sq_item, mp_subscript\r
- wins.\r
-\r
- This only adds new descriptors and doesn't overwrite entries in\r
- tp_dict that were previously defined. The descriptors contain a\r
- reference to the C function they must call, so that it's safe if they\r
- are copied into a subtype's __dict__ and the subtype has a different\r
- C function in its slot -- calling the method defined by the\r
- descriptor will call the C function that was used to create it,\r
- rather than the C function present in the slot when it is called.\r
- (This is important because a subtype may have a C function in the\r
- slot that calls the method from the dictionary, and we want to avoid\r
- infinite recursion here.) */\r
-\r
-static int\r
-add_operators(PyTypeObject *type)\r
-{\r
- PyObject *dict = type->tp_dict;\r
- slotdef *p;\r
- PyObject *descr;\r
- void **ptr;\r
-\r
- init_slotdefs();\r
- for (p = slotdefs; p->name; p++) {\r
- if (p->wrapper == NULL)\r
- continue;\r
- ptr = slotptr(type, p->offset);\r
- if (!ptr || !*ptr)\r
- continue;\r
- if (PyDict_GetItem(dict, p->name_strobj))\r
- continue;\r
- if (*ptr == PyObject_HashNotImplemented) {\r
- /* Classes may prevent the inheritance of the tp_hash\r
- slot by storing PyObject_HashNotImplemented in it. Make it\r
- visible as a None value for the __hash__ attribute. */\r
- if (PyDict_SetItem(dict, p->name_strobj, Py_None) < 0)\r
- return -1;\r
- }\r
- else {\r
- descr = PyDescr_NewWrapper(type, p, *ptr);\r
- if (descr == NULL)\r
- return -1;\r
- if (PyDict_SetItem(dict, p->name_strobj, descr) < 0)\r
- return -1;\r
- Py_DECREF(descr);\r
- }\r
- }\r
- if (type->tp_new != NULL) {\r
- if (add_tp_new_wrapper(type) < 0)\r
- return -1;\r
- }\r
- return 0;\r
-}\r
-\r
-\r
-/* Cooperative 'super' */\r
-\r
-typedef struct {\r
- PyObject_HEAD\r
- PyTypeObject *type;\r
- PyObject *obj;\r
- PyTypeObject *obj_type;\r
-} superobject;\r
-\r
-static PyMemberDef super_members[] = {\r
- {"__thisclass__", T_OBJECT, offsetof(superobject, type), READONLY,\r
- "the class invoking super()"},\r
- {"__self__", T_OBJECT, offsetof(superobject, obj), READONLY,\r
- "the instance invoking super(); may be None"},\r
- {"__self_class__", T_OBJECT, offsetof(superobject, obj_type), READONLY,\r
- "the type of the instance invoking super(); may be None"},\r
- {0}\r
-};\r
-\r
-static void\r
-super_dealloc(PyObject *self)\r
-{\r
- superobject *su = (superobject *)self;\r
-\r
- _PyObject_GC_UNTRACK(self);\r
- Py_XDECREF(su->obj);\r
- Py_XDECREF(su->type);\r
- Py_XDECREF(su->obj_type);\r
- Py_TYPE(self)->tp_free(self);\r
-}\r
-\r
-static PyObject *\r
-super_repr(PyObject *self)\r
-{\r
- superobject *su = (superobject *)self;\r
-\r
- if (su->obj_type)\r
- return PyString_FromFormat(\r
- "<super: <class '%s'>, <%s object>>",\r
- su->type ? su->type->tp_name : "NULL",\r
- su->obj_type->tp_name);\r
- else\r
- return PyString_FromFormat(\r
- "<super: <class '%s'>, NULL>",\r
- su->type ? su->type->tp_name : "NULL");\r
-}\r
-\r
-static PyObject *\r
-super_getattro(PyObject *self, PyObject *name)\r
-{\r
- superobject *su = (superobject *)self;\r
- int skip = su->obj_type == NULL;\r
-\r
- if (!skip) {\r
- /* We want __class__ to return the class of the super object\r
- (i.e. super, or a subclass), not the class of su->obj. */\r
- skip = (PyString_Check(name) &&\r
- PyString_GET_SIZE(name) == 9 &&\r
- strcmp(PyString_AS_STRING(name), "__class__") == 0);\r
- }\r
-\r
- if (!skip) {\r
- PyObject *mro, *res, *tmp, *dict;\r
- PyTypeObject *starttype;\r
- descrgetfunc f;\r
- Py_ssize_t i, n;\r
-\r
- starttype = su->obj_type;\r
- mro = starttype->tp_mro;\r
-\r
- if (mro == NULL)\r
- n = 0;\r
- else {\r
- assert(PyTuple_Check(mro));\r
- n = PyTuple_GET_SIZE(mro);\r
- }\r
- for (i = 0; i < n; i++) {\r
- if ((PyObject *)(su->type) == PyTuple_GET_ITEM(mro, i))\r
- break;\r
- }\r
- i++;\r
- res = NULL;\r
- for (; i < n; i++) {\r
- tmp = PyTuple_GET_ITEM(mro, i);\r
- if (PyType_Check(tmp))\r
- dict = ((PyTypeObject *)tmp)->tp_dict;\r
- else if (PyClass_Check(tmp))\r
- dict = ((PyClassObject *)tmp)->cl_dict;\r
- else\r
- continue;\r
- res = PyDict_GetItem(dict, name);\r
- if (res != NULL) {\r
- Py_INCREF(res);\r
- f = Py_TYPE(res)->tp_descr_get;\r
- if (f != NULL) {\r
- tmp = f(res,\r
- /* Only pass 'obj' param if\r
- this is instance-mode super\r
- (See SF ID #743627)\r
- */\r
- (su->obj == (PyObject *)\r
- su->obj_type\r
- ? (PyObject *)NULL\r
- : su->obj),\r
- (PyObject *)starttype);\r
- Py_DECREF(res);\r
- res = tmp;\r
- }\r
- return res;\r
- }\r
- }\r
- }\r
- return PyObject_GenericGetAttr(self, name);\r
-}\r
-\r
-static PyTypeObject *\r
-supercheck(PyTypeObject *type, PyObject *obj)\r
-{\r
- /* Check that a super() call makes sense. Return a type object.\r
-\r
- obj can be a new-style class, or an instance of one:\r
-\r
- - If it is a class, it must be a subclass of 'type'. This case is\r
- used for class methods; the return value is obj.\r
-\r
- - If it is an instance, it must be an instance of 'type'. This is\r
- the normal case; the return value is obj.__class__.\r
-\r
- But... when obj is an instance, we want to allow for the case where\r
- Py_TYPE(obj) is not a subclass of type, but obj.__class__ is!\r
- This will allow using super() with a proxy for obj.\r
- */\r
-\r
- /* Check for first bullet above (special case) */\r
- if (PyType_Check(obj) && PyType_IsSubtype((PyTypeObject *)obj, type)) {\r
- Py_INCREF(obj);\r
- return (PyTypeObject *)obj;\r
- }\r
-\r
- /* Normal case */\r
- if (PyType_IsSubtype(Py_TYPE(obj), type)) {\r
- Py_INCREF(Py_TYPE(obj));\r
- return Py_TYPE(obj);\r
- }\r
- else {\r
- /* Try the slow way */\r
- static PyObject *class_str = NULL;\r
- PyObject *class_attr;\r
-\r
- if (class_str == NULL) {\r
- class_str = PyString_FromString("__class__");\r
- if (class_str == NULL)\r
- return NULL;\r
- }\r
-\r
- class_attr = PyObject_GetAttr(obj, class_str);\r
-\r
- if (class_attr != NULL &&\r
- PyType_Check(class_attr) &&\r
- (PyTypeObject *)class_attr != Py_TYPE(obj))\r
- {\r
- int ok = PyType_IsSubtype(\r
- (PyTypeObject *)class_attr, type);\r
- if (ok)\r
- return (PyTypeObject *)class_attr;\r
- }\r
-\r
- if (class_attr == NULL)\r
- PyErr_Clear();\r
- else\r
- Py_DECREF(class_attr);\r
- }\r
-\r
- PyErr_SetString(PyExc_TypeError,\r
- "super(type, obj): "\r
- "obj must be an instance or subtype of type");\r
- return NULL;\r
-}\r
-\r
-static PyObject *\r
-super_descr_get(PyObject *self, PyObject *obj, PyObject *type)\r
-{\r
- superobject *su = (superobject *)self;\r
- superobject *newobj;\r
-\r
- if (obj == NULL || obj == Py_None || su->obj != NULL) {\r
- /* Not binding to an object, or already bound */\r
- Py_INCREF(self);\r
- return self;\r
- }\r
- if (Py_TYPE(su) != &PySuper_Type)\r
- /* If su is an instance of a (strict) subclass of super,\r
- call its type */\r
- return PyObject_CallFunctionObjArgs((PyObject *)Py_TYPE(su),\r
- su->type, obj, NULL);\r
- else {\r
- /* Inline the common case */\r
- PyTypeObject *obj_type = supercheck(su->type, obj);\r
- if (obj_type == NULL)\r
- return NULL;\r
- newobj = (superobject *)PySuper_Type.tp_new(&PySuper_Type,\r
- NULL, NULL);\r
- if (newobj == NULL)\r
- return NULL;\r
- Py_INCREF(su->type);\r
- Py_INCREF(obj);\r
- newobj->type = su->type;\r
- newobj->obj = obj;\r
- newobj->obj_type = obj_type;\r
- return (PyObject *)newobj;\r
- }\r
-}\r
-\r
-static int\r
-super_init(PyObject *self, PyObject *args, PyObject *kwds)\r
-{\r
- superobject *su = (superobject *)self;\r
- PyTypeObject *type;\r
- PyObject *obj = NULL;\r
- PyTypeObject *obj_type = NULL;\r
-\r
- if (!_PyArg_NoKeywords("super", kwds))\r
- return -1;\r
- if (!PyArg_ParseTuple(args, "O!|O:super", &PyType_Type, &type, &obj))\r
- return -1;\r
- if (obj == Py_None)\r
- obj = NULL;\r
- if (obj != NULL) {\r
- obj_type = supercheck(type, obj);\r
- if (obj_type == NULL)\r
- return -1;\r
- Py_INCREF(obj);\r
- }\r
- Py_INCREF(type);\r
- su->type = type;\r
- su->obj = obj;\r
- su->obj_type = obj_type;\r
- return 0;\r
-}\r
-\r
-PyDoc_STRVAR(super_doc,\r
-"super(type, obj) -> bound super object; requires isinstance(obj, type)\n"\r
-"super(type) -> unbound super object\n"\r
-"super(type, type2) -> bound super object; requires issubclass(type2, type)\n"\r
-"Typical use to call a cooperative superclass method:\n"\r
-"class C(B):\n"\r
-" def meth(self, arg):\n"\r
-" super(C, self).meth(arg)");\r
-\r
-static int\r
-super_traverse(PyObject *self, visitproc visit, void *arg)\r
-{\r
- superobject *su = (superobject *)self;\r
-\r
- Py_VISIT(su->obj);\r
- Py_VISIT(su->type);\r
- Py_VISIT(su->obj_type);\r
-\r
- return 0;\r
-}\r
-\r
-PyTypeObject PySuper_Type = {\r
- PyVarObject_HEAD_INIT(&PyType_Type, 0)\r
- "super", /* tp_name */\r
- sizeof(superobject), /* tp_basicsize */\r
- 0, /* tp_itemsize */\r
- /* methods */\r
- super_dealloc, /* tp_dealloc */\r
- 0, /* tp_print */\r
- 0, /* tp_getattr */\r
- 0, /* tp_setattr */\r
- 0, /* tp_compare */\r
- super_repr, /* tp_repr */\r
- 0, /* tp_as_number */\r
- 0, /* tp_as_sequence */\r
- 0, /* tp_as_mapping */\r
- 0, /* tp_hash */\r
- 0, /* tp_call */\r
- 0, /* tp_str */\r
- super_getattro, /* tp_getattro */\r
- 0, /* tp_setattro */\r
- 0, /* tp_as_buffer */\r
- Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |\r
- Py_TPFLAGS_BASETYPE, /* tp_flags */\r
- super_doc, /* tp_doc */\r
- super_traverse, /* tp_traverse */\r
- 0, /* tp_clear */\r
- 0, /* tp_richcompare */\r
- 0, /* tp_weaklistoffset */\r
- 0, /* tp_iter */\r
- 0, /* tp_iternext */\r
- 0, /* tp_methods */\r
- super_members, /* tp_members */\r
- 0, /* tp_getset */\r
- 0, /* tp_base */\r
- 0, /* tp_dict */\r
- super_descr_get, /* tp_descr_get */\r
- 0, /* tp_descr_set */\r
- 0, /* tp_dictoffset */\r
- super_init, /* tp_init */\r
- PyType_GenericAlloc, /* tp_alloc */\r
- PyType_GenericNew, /* tp_new */\r
- PyObject_GC_Del, /* tp_free */\r
-};\r
projects / mirror_edk2.git / blobdiff