mirror of https://github.com/python/cpython
5149 lines
129 KiB
C
5149 lines
129 KiB
C
/* Type object implementation */
|
|
|
|
#include "Python.h"
|
|
#include "structmember.h"
|
|
|
|
#include <ctype.h>
|
|
|
|
/* The *real* layout of a type object when allocated on the heap */
|
|
/* XXX Should we publish this in a header file? */
|
|
typedef struct {
|
|
/* Note: there's a dependency on the order of these members
|
|
in slotptr() below. */
|
|
PyTypeObject type;
|
|
PyNumberMethods as_number;
|
|
PyMappingMethods as_mapping;
|
|
PySequenceMethods as_sequence; /* as_sequence comes after as_mapping,
|
|
so that the mapping wins when both
|
|
the mapping and the sequence define
|
|
a given operator (e.g. __getitem__).
|
|
see add_operators() below. */
|
|
PyBufferProcs as_buffer;
|
|
PyObject *name, *slots;
|
|
PyMemberDef members[1];
|
|
} etype;
|
|
|
|
static PyMemberDef type_members[] = {
|
|
{"__basicsize__", T_INT, offsetof(PyTypeObject,tp_basicsize),READONLY},
|
|
{"__itemsize__", T_INT, offsetof(PyTypeObject, tp_itemsize), READONLY},
|
|
{"__flags__", T_LONG, offsetof(PyTypeObject, tp_flags), READONLY},
|
|
{"__weakrefoffset__", T_LONG,
|
|
offsetof(PyTypeObject, tp_weaklistoffset), READONLY},
|
|
{"__base__", T_OBJECT, offsetof(PyTypeObject, tp_base), READONLY},
|
|
{"__dictoffset__", T_LONG,
|
|
offsetof(PyTypeObject, tp_dictoffset), READONLY},
|
|
{"__mro__", T_OBJECT, offsetof(PyTypeObject, tp_mro), READONLY},
|
|
{0}
|
|
};
|
|
|
|
static PyObject *
|
|
type_name(PyTypeObject *type, void *context)
|
|
{
|
|
char *s;
|
|
|
|
if (type->tp_flags & Py_TPFLAGS_HEAPTYPE) {
|
|
etype* et = (etype*)type;
|
|
|
|
Py_INCREF(et->name);
|
|
return et->name;
|
|
}
|
|
else {
|
|
s = strrchr(type->tp_name, '.');
|
|
if (s == NULL)
|
|
s = type->tp_name;
|
|
else
|
|
s++;
|
|
return PyString_FromString(s);
|
|
}
|
|
}
|
|
|
|
static int
|
|
type_set_name(PyTypeObject *type, PyObject *value, void *context)
|
|
{
|
|
etype* et;
|
|
|
|
if (!(type->tp_flags & Py_TPFLAGS_HEAPTYPE)) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"can't set %s.__name__", type->tp_name);
|
|
return -1;
|
|
}
|
|
if (!value) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"can't delete %s.__name__", type->tp_name);
|
|
return -1;
|
|
}
|
|
if (!PyString_Check(value)) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"can only assign string to %s.__name__, not '%s'",
|
|
type->tp_name, value->ob_type->tp_name);
|
|
return -1;
|
|
}
|
|
if (strlen(PyString_AS_STRING(value))
|
|
!= (size_t)PyString_GET_SIZE(value)) {
|
|
PyErr_Format(PyExc_ValueError,
|
|
"__name__ must not contain null bytes");
|
|
return -1;
|
|
}
|
|
|
|
et = (etype*)type;
|
|
|
|
Py_INCREF(value);
|
|
|
|
Py_DECREF(et->name);
|
|
et->name = value;
|
|
|
|
type->tp_name = PyString_AS_STRING(value);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static PyObject *
|
|
type_module(PyTypeObject *type, void *context)
|
|
{
|
|
PyObject *mod;
|
|
char *s;
|
|
|
|
if (type->tp_flags & Py_TPFLAGS_HEAPTYPE) {
|
|
mod = PyDict_GetItemString(type->tp_dict, "__module__");
|
|
Py_XINCREF(mod);
|
|
return mod;
|
|
}
|
|
else {
|
|
s = strrchr(type->tp_name, '.');
|
|
if (s != NULL)
|
|
return PyString_FromStringAndSize(
|
|
type->tp_name, (int)(s - type->tp_name));
|
|
return PyString_FromString("__builtin__");
|
|
}
|
|
}
|
|
|
|
static int
|
|
type_set_module(PyTypeObject *type, PyObject *value, void *context)
|
|
{
|
|
if (!(type->tp_flags & Py_TPFLAGS_HEAPTYPE)) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"can't set %s.__module__", type->tp_name);
|
|
return -1;
|
|
}
|
|
if (!value) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"can't delete %s.__module__", type->tp_name);
|
|
return -1;
|
|
}
|
|
|
|
return PyDict_SetItemString(type->tp_dict, "__module__", value);
|
|
}
|
|
|
|
static PyObject *
|
|
type_get_bases(PyTypeObject *type, void *context)
|
|
{
|
|
Py_INCREF(type->tp_bases);
|
|
return type->tp_bases;
|
|
}
|
|
|
|
static PyTypeObject *best_base(PyObject *);
|
|
static int mro_internal(PyTypeObject *);
|
|
static int compatible_for_assignment(PyTypeObject *, PyTypeObject *, char *);
|
|
static int add_subclass(PyTypeObject*, PyTypeObject*);
|
|
static void remove_subclass(PyTypeObject *, PyTypeObject *);
|
|
static void update_all_slots(PyTypeObject *);
|
|
|
|
static int
|
|
mro_subclasses(PyTypeObject *type, PyObject* temp)
|
|
{
|
|
PyTypeObject *subclass;
|
|
PyObject *ref, *subclasses, *old_mro;
|
|
int i, n;
|
|
|
|
subclasses = type->tp_subclasses;
|
|
if (subclasses == NULL)
|
|
return 0;
|
|
assert(PyList_Check(subclasses));
|
|
n = PyList_GET_SIZE(subclasses);
|
|
for (i = 0; i < n; i++) {
|
|
ref = PyList_GET_ITEM(subclasses, i);
|
|
assert(PyWeakref_CheckRef(ref));
|
|
subclass = (PyTypeObject *)PyWeakref_GET_OBJECT(ref);
|
|
assert(subclass != NULL);
|
|
if ((PyObject *)subclass == Py_None)
|
|
continue;
|
|
assert(PyType_Check(subclass));
|
|
old_mro = subclass->tp_mro;
|
|
if (mro_internal(subclass) < 0) {
|
|
subclass->tp_mro = old_mro;
|
|
return -1;
|
|
}
|
|
else {
|
|
PyObject* tuple;
|
|
tuple = Py_BuildValue("OO", subclass, old_mro);
|
|
if (!tuple)
|
|
return -1;
|
|
if (PyList_Append(temp, tuple) < 0)
|
|
return -1;
|
|
}
|
|
if (mro_subclasses(subclass, temp) < 0)
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
type_set_bases(PyTypeObject *type, PyObject *value, void *context)
|
|
{
|
|
int i, r = 0;
|
|
PyObject *ob, *temp;
|
|
PyTypeObject *new_base, *old_base;
|
|
PyObject *old_bases, *old_mro;
|
|
|
|
if (!(type->tp_flags & Py_TPFLAGS_HEAPTYPE)) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"can't set %s.__bases__", type->tp_name);
|
|
return -1;
|
|
}
|
|
if (!value) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"can't delete %s.__bases__", type->tp_name);
|
|
return -1;
|
|
}
|
|
if (!PyTuple_Check(value)) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"can only assign tuple to %s.__bases__, not %s",
|
|
type->tp_name, value->ob_type->tp_name);
|
|
return -1;
|
|
}
|
|
for (i = 0; i < PyTuple_GET_SIZE(value); i++) {
|
|
ob = PyTuple_GET_ITEM(value, i);
|
|
if (!PyClass_Check(ob) && !PyType_Check(ob)) {
|
|
PyErr_Format(
|
|
PyExc_TypeError,
|
|
"%s.__bases__ must be tuple of old- or new-style classes, not '%s'",
|
|
type->tp_name, ob->ob_type->tp_name);
|
|
return -1;
|
|
}
|
|
if (PyType_Check(ob)) {
|
|
if (PyType_IsSubtype((PyTypeObject*)ob, type)) {
|
|
PyErr_SetString(PyExc_TypeError,
|
|
"a __bases__ item causes an inheritance cycle");
|
|
return -1;
|
|
}
|
|
}
|
|
}
|
|
|
|
new_base = best_base(value);
|
|
|
|
if (!new_base) {
|
|
return -1;
|
|
}
|
|
|
|
if (!compatible_for_assignment(type->tp_base, new_base, "__bases__"))
|
|
return -1;
|
|
|
|
Py_INCREF(new_base);
|
|
Py_INCREF(value);
|
|
|
|
old_bases = type->tp_bases;
|
|
old_base = type->tp_base;
|
|
old_mro = type->tp_mro;
|
|
|
|
type->tp_bases = value;
|
|
type->tp_base = new_base;
|
|
|
|
if (mro_internal(type) < 0) {
|
|
goto bail;
|
|
}
|
|
|
|
temp = PyList_New(0);
|
|
if (!temp)
|
|
goto bail;
|
|
|
|
r = mro_subclasses(type, temp);
|
|
|
|
if (r < 0) {
|
|
for (i = 0; i < PyList_Size(temp); i++) {
|
|
PyTypeObject* cls;
|
|
PyObject* mro;
|
|
PyArg_ParseTuple(PyList_GetItem(temp, i),
|
|
"OO", &cls, &mro);
|
|
Py_DECREF(cls->tp_mro);
|
|
cls->tp_mro = mro;
|
|
Py_INCREF(cls->tp_mro);
|
|
}
|
|
Py_DECREF(temp);
|
|
goto bail;
|
|
}
|
|
|
|
Py_DECREF(temp);
|
|
|
|
/* any base that was in __bases__ but now isn't, we
|
|
need to remove |type| from it's tp_subclasses.
|
|
conversely, any class now in __bases__ that wasn't
|
|
needs to have |type| added to it's subclasses. */
|
|
|
|
/* for now, sod that: just remove from all old_bases,
|
|
add to all new_bases */
|
|
|
|
for (i = PyTuple_GET_SIZE(old_bases) - 1; i >= 0; i--) {
|
|
ob = PyTuple_GET_ITEM(old_bases, i);
|
|
if (PyType_Check(ob)) {
|
|
remove_subclass(
|
|
(PyTypeObject*)ob, type);
|
|
}
|
|
}
|
|
|
|
for (i = PyTuple_GET_SIZE(value) - 1; i >= 0; i--) {
|
|
ob = PyTuple_GET_ITEM(value, i);
|
|
if (PyType_Check(ob)) {
|
|
if (add_subclass((PyTypeObject*)ob, type) < 0)
|
|
r = -1;
|
|
}
|
|
}
|
|
|
|
update_all_slots(type);
|
|
|
|
Py_DECREF(old_bases);
|
|
Py_DECREF(old_base);
|
|
Py_DECREF(old_mro);
|
|
|
|
return r;
|
|
|
|
bail:
|
|
type->tp_bases = old_bases;
|
|
type->tp_base = old_base;
|
|
type->tp_mro = old_mro;
|
|
|
|
Py_DECREF(value);
|
|
Py_DECREF(new_base);
|
|
|
|
return -1;
|
|
}
|
|
|
|
static PyObject *
|
|
type_dict(PyTypeObject *type, void *context)
|
|
{
|
|
if (type->tp_dict == NULL) {
|
|
Py_INCREF(Py_None);
|
|
return Py_None;
|
|
}
|
|
return PyDictProxy_New(type->tp_dict);
|
|
}
|
|
|
|
static PyObject *
|
|
type_get_doc(PyTypeObject *type, void *context)
|
|
{
|
|
PyObject *result;
|
|
if (!(type->tp_flags & Py_TPFLAGS_HEAPTYPE) && type->tp_doc != NULL)
|
|
return PyString_FromString(type->tp_doc);
|
|
result = PyDict_GetItemString(type->tp_dict, "__doc__");
|
|
if (result == NULL) {
|
|
result = Py_None;
|
|
Py_INCREF(result);
|
|
}
|
|
else if (result->ob_type->tp_descr_get) {
|
|
result = result->ob_type->tp_descr_get(result, NULL,
|
|
(PyObject *)type);
|
|
}
|
|
else {
|
|
Py_INCREF(result);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static PyGetSetDef type_getsets[] = {
|
|
{"__name__", (getter)type_name, (setter)type_set_name, NULL},
|
|
{"__bases__", (getter)type_get_bases, (setter)type_set_bases, NULL},
|
|
{"__module__", (getter)type_module, (setter)type_set_module, NULL},
|
|
{"__dict__", (getter)type_dict, NULL, NULL},
|
|
{"__doc__", (getter)type_get_doc, NULL, NULL},
|
|
{0}
|
|
};
|
|
|
|
static int
|
|
type_compare(PyObject *v, PyObject *w)
|
|
{
|
|
/* This is called with type objects only. So we
|
|
can just compare the addresses. */
|
|
Py_uintptr_t vv = (Py_uintptr_t)v;
|
|
Py_uintptr_t ww = (Py_uintptr_t)w;
|
|
return (vv < ww) ? -1 : (vv > ww) ? 1 : 0;
|
|
}
|
|
|
|
static PyObject *
|
|
type_repr(PyTypeObject *type)
|
|
{
|
|
PyObject *mod, *name, *rtn;
|
|
char *kind;
|
|
|
|
mod = type_module(type, NULL);
|
|
if (mod == NULL)
|
|
PyErr_Clear();
|
|
else if (!PyString_Check(mod)) {
|
|
Py_DECREF(mod);
|
|
mod = NULL;
|
|
}
|
|
name = type_name(type, NULL);
|
|
if (name == NULL)
|
|
return NULL;
|
|
|
|
if (type->tp_flags & Py_TPFLAGS_HEAPTYPE)
|
|
kind = "class";
|
|
else
|
|
kind = "type";
|
|
|
|
if (mod != NULL && strcmp(PyString_AS_STRING(mod), "__builtin__")) {
|
|
rtn = PyString_FromFormat("<%s '%s.%s'>",
|
|
kind,
|
|
PyString_AS_STRING(mod),
|
|
PyString_AS_STRING(name));
|
|
}
|
|
else
|
|
rtn = PyString_FromFormat("<%s '%s'>", kind, type->tp_name);
|
|
|
|
Py_XDECREF(mod);
|
|
Py_DECREF(name);
|
|
return rtn;
|
|
}
|
|
|
|
static PyObject *
|
|
type_call(PyTypeObject *type, PyObject *args, PyObject *kwds)
|
|
{
|
|
PyObject *obj;
|
|
|
|
if (type->tp_new == NULL) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"cannot create '%.100s' instances",
|
|
type->tp_name);
|
|
return NULL;
|
|
}
|
|
|
|
obj = type->tp_new(type, args, kwds);
|
|
if (obj != NULL) {
|
|
/* Ugly exception: when the call was type(something),
|
|
don't call tp_init on the result. */
|
|
if (type == &PyType_Type &&
|
|
PyTuple_Check(args) && PyTuple_GET_SIZE(args) == 1 &&
|
|
(kwds == NULL ||
|
|
(PyDict_Check(kwds) && PyDict_Size(kwds) == 0)))
|
|
return obj;
|
|
/* If the returned object is not an instance of type,
|
|
it won't be initialized. */
|
|
if (!PyType_IsSubtype(obj->ob_type, type))
|
|
return obj;
|
|
type = obj->ob_type;
|
|
if (PyType_HasFeature(type, Py_TPFLAGS_HAVE_CLASS) &&
|
|
type->tp_init != NULL &&
|
|
type->tp_init(obj, args, kwds) < 0) {
|
|
Py_DECREF(obj);
|
|
obj = NULL;
|
|
}
|
|
}
|
|
return obj;
|
|
}
|
|
|
|
PyObject *
|
|
PyType_GenericAlloc(PyTypeObject *type, int nitems)
|
|
{
|
|
PyObject *obj;
|
|
const size_t size = _PyObject_VAR_SIZE(type, nitems);
|
|
|
|
if (PyType_IS_GC(type))
|
|
obj = _PyObject_GC_Malloc(size);
|
|
else
|
|
obj = PyObject_MALLOC(size);
|
|
|
|
if (obj == NULL)
|
|
return PyErr_NoMemory();
|
|
|
|
memset(obj, '\0', size);
|
|
|
|
if (type->tp_flags & Py_TPFLAGS_HEAPTYPE)
|
|
Py_INCREF(type);
|
|
|
|
if (type->tp_itemsize == 0)
|
|
PyObject_INIT(obj, type);
|
|
else
|
|
(void) PyObject_INIT_VAR((PyVarObject *)obj, type, nitems);
|
|
|
|
if (PyType_IS_GC(type))
|
|
_PyObject_GC_TRACK(obj);
|
|
return obj;
|
|
}
|
|
|
|
PyObject *
|
|
PyType_GenericNew(PyTypeObject *type, PyObject *args, PyObject *kwds)
|
|
{
|
|
return type->tp_alloc(type, 0);
|
|
}
|
|
|
|
/* Helpers for subtyping */
|
|
|
|
static int
|
|
traverse_slots(PyTypeObject *type, PyObject *self, visitproc visit, void *arg)
|
|
{
|
|
int i, n;
|
|
PyMemberDef *mp;
|
|
|
|
n = type->ob_size;
|
|
mp = ((etype *)type)->members;
|
|
for (i = 0; i < n; i++, mp++) {
|
|
if (mp->type == T_OBJECT_EX) {
|
|
char *addr = (char *)self + mp->offset;
|
|
PyObject *obj = *(PyObject **)addr;
|
|
if (obj != NULL) {
|
|
int err = visit(obj, arg);
|
|
if (err)
|
|
return err;
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
subtype_traverse(PyObject *self, visitproc visit, void *arg)
|
|
{
|
|
PyTypeObject *type, *base;
|
|
traverseproc basetraverse;
|
|
|
|
/* Find the nearest base with a different tp_traverse,
|
|
and traverse slots while we're at it */
|
|
type = self->ob_type;
|
|
base = type;
|
|
while ((basetraverse = base->tp_traverse) == subtype_traverse) {
|
|
if (base->ob_size) {
|
|
int err = traverse_slots(base, self, visit, arg);
|
|
if (err)
|
|
return err;
|
|
}
|
|
base = base->tp_base;
|
|
assert(base);
|
|
}
|
|
|
|
if (type->tp_dictoffset != base->tp_dictoffset) {
|
|
PyObject **dictptr = _PyObject_GetDictPtr(self);
|
|
if (dictptr && *dictptr) {
|
|
int err = visit(*dictptr, arg);
|
|
if (err)
|
|
return err;
|
|
}
|
|
}
|
|
|
|
if (type->tp_flags & Py_TPFLAGS_HEAPTYPE) {
|
|
/* For a heaptype, the instances count as references
|
|
to the type. Traverse the type so the collector
|
|
can find cycles involving this link. */
|
|
int err = visit((PyObject *)type, arg);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
if (basetraverse)
|
|
return basetraverse(self, visit, arg);
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
clear_slots(PyTypeObject *type, PyObject *self)
|
|
{
|
|
int i, n;
|
|
PyMemberDef *mp;
|
|
|
|
n = type->ob_size;
|
|
mp = ((etype *)type)->members;
|
|
for (i = 0; i < n; i++, mp++) {
|
|
if (mp->type == T_OBJECT_EX && !(mp->flags & READONLY)) {
|
|
char *addr = (char *)self + mp->offset;
|
|
PyObject *obj = *(PyObject **)addr;
|
|
if (obj != NULL) {
|
|
Py_DECREF(obj);
|
|
*(PyObject **)addr = NULL;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static int
|
|
subtype_clear(PyObject *self)
|
|
{
|
|
PyTypeObject *type, *base;
|
|
inquiry baseclear;
|
|
|
|
/* Find the nearest base with a different tp_clear
|
|
and clear slots while we're at it */
|
|
type = self->ob_type;
|
|
base = type;
|
|
while ((baseclear = base->tp_clear) == subtype_clear) {
|
|
if (base->ob_size)
|
|
clear_slots(base, self);
|
|
base = base->tp_base;
|
|
assert(base);
|
|
}
|
|
|
|
/* There's no need to clear the instance dict (if any);
|
|
the collector will call its tp_clear handler. */
|
|
|
|
if (baseclear)
|
|
return baseclear(self);
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
subtype_dealloc(PyObject *self)
|
|
{
|
|
PyTypeObject *type, *base;
|
|
destructor basedealloc;
|
|
|
|
/* Extract the type; we expect it to be a heap type */
|
|
type = self->ob_type;
|
|
assert(type->tp_flags & Py_TPFLAGS_HEAPTYPE);
|
|
|
|
/* Test whether the type has GC exactly once */
|
|
|
|
if (!PyType_IS_GC(type)) {
|
|
/* It's really rare to find a dynamic type that doesn't have
|
|
GC; it can only happen when deriving from 'object' and not
|
|
adding any slots or instance variables. This allows
|
|
certain simplifications: there's no need to call
|
|
clear_slots(), or DECREF the dict, or clear weakrefs. */
|
|
|
|
/* Maybe call finalizer; exit early if resurrected */
|
|
if (type->tp_del) {
|
|
type->tp_del(self);
|
|
if (self->ob_refcnt > 0)
|
|
return;
|
|
}
|
|
|
|
/* Find the nearest base with a different tp_dealloc */
|
|
base = type;
|
|
while ((basedealloc = base->tp_dealloc) == subtype_dealloc) {
|
|
assert(base->ob_size == 0);
|
|
base = base->tp_base;
|
|
assert(base);
|
|
}
|
|
|
|
/* Call the base tp_dealloc() */
|
|
assert(basedealloc);
|
|
basedealloc(self);
|
|
|
|
/* Can't reference self beyond this point */
|
|
Py_DECREF(type);
|
|
|
|
/* Done */
|
|
return;
|
|
}
|
|
|
|
/* We get here only if the type has GC */
|
|
|
|
/* UnTrack and re-Track around the trashcan macro, alas */
|
|
PyObject_GC_UnTrack(self);
|
|
Py_TRASHCAN_SAFE_BEGIN(self);
|
|
_PyObject_GC_TRACK(self); /* We'll untrack for real later */
|
|
|
|
/* Maybe call finalizer; exit early if resurrected */
|
|
if (type->tp_del) {
|
|
type->tp_del(self);
|
|
if (self->ob_refcnt > 0)
|
|
goto endlabel;
|
|
}
|
|
|
|
/* Find the nearest base with a different tp_dealloc
|
|
and clear slots while we're at it */
|
|
base = type;
|
|
while ((basedealloc = base->tp_dealloc) == subtype_dealloc) {
|
|
if (base->ob_size)
|
|
clear_slots(base, self);
|
|
base = base->tp_base;
|
|
assert(base);
|
|
}
|
|
|
|
/* If we added a dict, DECREF it */
|
|
if (type->tp_dictoffset && !base->tp_dictoffset) {
|
|
PyObject **dictptr = _PyObject_GetDictPtr(self);
|
|
if (dictptr != NULL) {
|
|
PyObject *dict = *dictptr;
|
|
if (dict != NULL) {
|
|
Py_DECREF(dict);
|
|
*dictptr = NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* If we added weaklist, we clear it */
|
|
if (type->tp_weaklistoffset && !base->tp_weaklistoffset)
|
|
PyObject_ClearWeakRefs(self);
|
|
|
|
/* Finalize GC if the base doesn't do GC and we do */
|
|
if (!PyType_IS_GC(base))
|
|
_PyObject_GC_UNTRACK(self);
|
|
|
|
/* Call the base tp_dealloc() */
|
|
assert(basedealloc);
|
|
basedealloc(self);
|
|
|
|
/* Can't reference self beyond this point */
|
|
Py_DECREF(type);
|
|
|
|
endlabel:
|
|
Py_TRASHCAN_SAFE_END(self);
|
|
}
|
|
|
|
static PyTypeObject *solid_base(PyTypeObject *type);
|
|
|
|
/* type test with subclassing support */
|
|
|
|
int
|
|
PyType_IsSubtype(PyTypeObject *a, PyTypeObject *b)
|
|
{
|
|
PyObject *mro;
|
|
|
|
if (!(a->tp_flags & Py_TPFLAGS_HAVE_CLASS))
|
|
return b == a || b == &PyBaseObject_Type;
|
|
|
|
mro = a->tp_mro;
|
|
if (mro != NULL) {
|
|
/* Deal with multiple inheritance without recursion
|
|
by walking the MRO tuple */
|
|
int i, n;
|
|
assert(PyTuple_Check(mro));
|
|
n = PyTuple_GET_SIZE(mro);
|
|
for (i = 0; i < n; i++) {
|
|
if (PyTuple_GET_ITEM(mro, i) == (PyObject *)b)
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
else {
|
|
/* a is not completely initilized yet; follow tp_base */
|
|
do {
|
|
if (a == b)
|
|
return 1;
|
|
a = a->tp_base;
|
|
} while (a != NULL);
|
|
return b == &PyBaseObject_Type;
|
|
}
|
|
}
|
|
|
|
/* Internal routines to do a method lookup in the type
|
|
without looking in the instance dictionary
|
|
(so we can't use PyObject_GetAttr) but still binding
|
|
it to the instance. The arguments are the object,
|
|
the method name as a C string, and the address of a
|
|
static variable used to cache the interned Python string.
|
|
|
|
Two variants:
|
|
|
|
- lookup_maybe() returns NULL without raising an exception
|
|
when the _PyType_Lookup() call fails;
|
|
|
|
- lookup_method() always raises an exception upon errors.
|
|
*/
|
|
|
|
static PyObject *
|
|
lookup_maybe(PyObject *self, char *attrstr, PyObject **attrobj)
|
|
{
|
|
PyObject *res;
|
|
|
|
if (*attrobj == NULL) {
|
|
*attrobj = PyString_InternFromString(attrstr);
|
|
if (*attrobj == NULL)
|
|
return NULL;
|
|
}
|
|
res = _PyType_Lookup(self->ob_type, *attrobj);
|
|
if (res != NULL) {
|
|
descrgetfunc f;
|
|
if ((f = res->ob_type->tp_descr_get) == NULL)
|
|
Py_INCREF(res);
|
|
else
|
|
res = f(res, self, (PyObject *)(self->ob_type));
|
|
}
|
|
return res;
|
|
}
|
|
|
|
static PyObject *
|
|
lookup_method(PyObject *self, char *attrstr, PyObject **attrobj)
|
|
{
|
|
PyObject *res = lookup_maybe(self, attrstr, attrobj);
|
|
if (res == NULL && !PyErr_Occurred())
|
|
PyErr_SetObject(PyExc_AttributeError, *attrobj);
|
|
return res;
|
|
}
|
|
|
|
/* A variation of PyObject_CallMethod that uses lookup_method()
|
|
instead of PyObject_GetAttrString(). This uses the same convention
|
|
as lookup_method to cache the interned name string object. */
|
|
|
|
static PyObject *
|
|
call_method(PyObject *o, char *name, PyObject **nameobj, char *format, ...)
|
|
{
|
|
va_list va;
|
|
PyObject *args, *func = 0, *retval;
|
|
va_start(va, format);
|
|
|
|
func = lookup_maybe(o, name, nameobj);
|
|
if (func == NULL) {
|
|
va_end(va);
|
|
if (!PyErr_Occurred())
|
|
PyErr_SetObject(PyExc_AttributeError, *nameobj);
|
|
return NULL;
|
|
}
|
|
|
|
if (format && *format)
|
|
args = Py_VaBuildValue(format, va);
|
|
else
|
|
args = PyTuple_New(0);
|
|
|
|
va_end(va);
|
|
|
|
if (args == NULL)
|
|
return NULL;
|
|
|
|
assert(PyTuple_Check(args));
|
|
retval = PyObject_Call(func, args, NULL);
|
|
|
|
Py_DECREF(args);
|
|
Py_DECREF(func);
|
|
|
|
return retval;
|
|
}
|
|
|
|
/* Clone of call_method() that returns NotImplemented when the lookup fails. */
|
|
|
|
static PyObject *
|
|
call_maybe(PyObject *o, char *name, PyObject **nameobj, char *format, ...)
|
|
{
|
|
va_list va;
|
|
PyObject *args, *func = 0, *retval;
|
|
va_start(va, format);
|
|
|
|
func = lookup_maybe(o, name, nameobj);
|
|
if (func == NULL) {
|
|
va_end(va);
|
|
if (!PyErr_Occurred()) {
|
|
Py_INCREF(Py_NotImplemented);
|
|
return Py_NotImplemented;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
if (format && *format)
|
|
args = Py_VaBuildValue(format, va);
|
|
else
|
|
args = PyTuple_New(0);
|
|
|
|
va_end(va);
|
|
|
|
if (args == NULL)
|
|
return NULL;
|
|
|
|
assert(PyTuple_Check(args));
|
|
retval = PyObject_Call(func, args, NULL);
|
|
|
|
Py_DECREF(args);
|
|
Py_DECREF(func);
|
|
|
|
return retval;
|
|
}
|
|
|
|
static int
|
|
fill_classic_mro(PyObject *mro, PyObject *cls)
|
|
{
|
|
PyObject *bases, *base;
|
|
int i, n;
|
|
|
|
assert(PyList_Check(mro));
|
|
assert(PyClass_Check(cls));
|
|
i = PySequence_Contains(mro, cls);
|
|
if (i < 0)
|
|
return -1;
|
|
if (!i) {
|
|
if (PyList_Append(mro, cls) < 0)
|
|
return -1;
|
|
}
|
|
bases = ((PyClassObject *)cls)->cl_bases;
|
|
assert(bases && PyTuple_Check(bases));
|
|
n = PyTuple_GET_SIZE(bases);
|
|
for (i = 0; i < n; i++) {
|
|
base = PyTuple_GET_ITEM(bases, i);
|
|
if (fill_classic_mro(mro, base) < 0)
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static PyObject *
|
|
classic_mro(PyObject *cls)
|
|
{
|
|
PyObject *mro;
|
|
|
|
assert(PyClass_Check(cls));
|
|
mro = PyList_New(0);
|
|
if (mro != NULL) {
|
|
if (fill_classic_mro(mro, cls) == 0)
|
|
return mro;
|
|
Py_DECREF(mro);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
Method resolution order algorithm C3 described in
|
|
"A Monotonic Superclass Linearization for Dylan",
|
|
by Kim Barrett, Bob Cassel, Paul Haahr,
|
|
David A. Moon, Keith Playford, and P. Tucker Withington.
|
|
(OOPSLA 1996)
|
|
|
|
Some notes about the rules implied by C3:
|
|
|
|
No duplicate bases.
|
|
It isn't legal to repeat a class in a list of base classes.
|
|
|
|
The next three properties are the 3 constraints in "C3".
|
|
|
|
Local precendece order.
|
|
If A precedes B in C's MRO, then A will precede B in the MRO of all
|
|
subclasses of C.
|
|
|
|
Monotonicity.
|
|
The MRO of a class must be an extension without reordering of the
|
|
MRO of each of its superclasses.
|
|
|
|
Extended Precedence Graph (EPG).
|
|
Linearization is consistent if there is a path in the EPG from
|
|
each class to all its successors in the linearization. See
|
|
the paper for definition of EPG.
|
|
*/
|
|
|
|
static int
|
|
tail_contains(PyObject *list, int whence, PyObject *o) {
|
|
int j, size;
|
|
size = PyList_GET_SIZE(list);
|
|
|
|
for (j = whence+1; j < size; j++) {
|
|
if (PyList_GET_ITEM(list, j) == o)
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static PyObject *
|
|
class_name(PyObject *cls)
|
|
{
|
|
PyObject *name = PyObject_GetAttrString(cls, "__name__");
|
|
if (name == NULL) {
|
|
PyErr_Clear();
|
|
Py_XDECREF(name);
|
|
name = PyObject_Repr(cls);
|
|
}
|
|
if (name == NULL)
|
|
return NULL;
|
|
if (!PyString_Check(name)) {
|
|
Py_DECREF(name);
|
|
return NULL;
|
|
}
|
|
return name;
|
|
}
|
|
|
|
static int
|
|
check_duplicates(PyObject *list)
|
|
{
|
|
int i, j, n;
|
|
/* Let's use a quadratic time algorithm,
|
|
assuming that the bases lists is short.
|
|
*/
|
|
n = PyList_GET_SIZE(list);
|
|
for (i = 0; i < n; i++) {
|
|
PyObject *o = PyList_GET_ITEM(list, i);
|
|
for (j = i + 1; j < n; j++) {
|
|
if (PyList_GET_ITEM(list, j) == o) {
|
|
o = class_name(o);
|
|
PyErr_Format(PyExc_TypeError,
|
|
"duplicate base class %s",
|
|
o ? PyString_AS_STRING(o) : "?");
|
|
Py_XDECREF(o);
|
|
return -1;
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Raise a TypeError for an MRO order disagreement.
|
|
|
|
It's hard to produce a good error message. In the absence of better
|
|
insight into error reporting, report the classes that were candidates
|
|
to be put next into the MRO. There is some conflict between the
|
|
order in which they should be put in the MRO, but it's hard to
|
|
diagnose what constraint can't be satisfied.
|
|
*/
|
|
|
|
static void
|
|
set_mro_error(PyObject *to_merge, int *remain)
|
|
{
|
|
int i, n, off, to_merge_size;
|
|
char buf[1000];
|
|
PyObject *k, *v;
|
|
PyObject *set = PyDict_New();
|
|
|
|
to_merge_size = PyList_GET_SIZE(to_merge);
|
|
for (i = 0; i < to_merge_size; i++) {
|
|
PyObject *L = PyList_GET_ITEM(to_merge, i);
|
|
if (remain[i] < PyList_GET_SIZE(L)) {
|
|
PyObject *c = PyList_GET_ITEM(L, remain[i]);
|
|
if (PyDict_SetItem(set, c, Py_None) < 0)
|
|
return;
|
|
}
|
|
}
|
|
n = PyDict_Size(set);
|
|
|
|
off = PyOS_snprintf(buf, sizeof(buf), "MRO conflict among bases");
|
|
i = 0;
|
|
while (PyDict_Next(set, &i, &k, &v) && off < sizeof(buf)) {
|
|
PyObject *name = class_name(k);
|
|
off += PyOS_snprintf(buf + off, sizeof(buf) - off, " %s",
|
|
name ? PyString_AS_STRING(name) : "?");
|
|
Py_XDECREF(name);
|
|
if (--n && off+1 < sizeof(buf)) {
|
|
buf[off++] = ',';
|
|
buf[off] = '\0';
|
|
}
|
|
}
|
|
PyErr_SetString(PyExc_TypeError, buf);
|
|
Py_DECREF(set);
|
|
}
|
|
|
|
static int
|
|
pmerge(PyObject *acc, PyObject* to_merge) {
|
|
int i, j, to_merge_size;
|
|
int *remain;
|
|
int ok, empty_cnt;
|
|
|
|
to_merge_size = PyList_GET_SIZE(to_merge);
|
|
|
|
/* remain stores an index into each sublist of to_merge.
|
|
remain[i] is the index of the next base in to_merge[i]
|
|
that is not included in acc.
|
|
*/
|
|
remain = PyMem_MALLOC(SIZEOF_INT*to_merge_size);
|
|
if (remain == NULL)
|
|
return -1;
|
|
for (i = 0; i < to_merge_size; i++)
|
|
remain[i] = 0;
|
|
|
|
again:
|
|
empty_cnt = 0;
|
|
for (i = 0; i < to_merge_size; i++) {
|
|
PyObject *candidate;
|
|
|
|
PyObject *cur_list = PyList_GET_ITEM(to_merge, i);
|
|
|
|
if (remain[i] >= PyList_GET_SIZE(cur_list)) {
|
|
empty_cnt++;
|
|
continue;
|
|
}
|
|
|
|
/* Choose next candidate for MRO.
|
|
|
|
The input sequences alone can determine the choice.
|
|
If not, choose the class which appears in the MRO
|
|
of the earliest direct superclass of the new class.
|
|
*/
|
|
|
|
candidate = PyList_GET_ITEM(cur_list, remain[i]);
|
|
for (j = 0; j < to_merge_size; j++) {
|
|
PyObject *j_lst = PyList_GET_ITEM(to_merge, j);
|
|
if (tail_contains(j_lst, remain[j], candidate)) {
|
|
goto skip; /* continue outer loop */
|
|
}
|
|
}
|
|
ok = PyList_Append(acc, candidate);
|
|
if (ok < 0) {
|
|
PyMem_Free(remain);
|
|
return -1;
|
|
}
|
|
for (j = 0; j < to_merge_size; j++) {
|
|
PyObject *j_lst = PyList_GET_ITEM(to_merge, j);
|
|
if (PyList_GET_ITEM(j_lst, remain[j]) == candidate) {
|
|
remain[j]++;
|
|
}
|
|
}
|
|
goto again;
|
|
skip: ;
|
|
}
|
|
|
|
if (empty_cnt == to_merge_size) {
|
|
PyMem_FREE(remain);
|
|
return 0;
|
|
}
|
|
set_mro_error(to_merge, remain);
|
|
PyMem_FREE(remain);
|
|
return -1;
|
|
}
|
|
|
|
static PyObject *
|
|
mro_implementation(PyTypeObject *type)
|
|
{
|
|
int i, n, ok;
|
|
PyObject *bases, *result;
|
|
PyObject *to_merge, *bases_aslist;
|
|
|
|
if(type->tp_dict == NULL) {
|
|
if(PyType_Ready(type) < 0)
|
|
return NULL;
|
|
}
|
|
|
|
/* Find a superclass linearization that honors the constraints
|
|
of the explicit lists of bases and the constraints implied by
|
|
each base class.
|
|
|
|
to_merge is a list of lists, where each list is a superclass
|
|
linearization implied by a base class. The last element of
|
|
to_merge is the declared list of bases.
|
|
*/
|
|
|
|
bases = type->tp_bases;
|
|
n = PyTuple_GET_SIZE(bases);
|
|
|
|
to_merge = PyList_New(n+1);
|
|
if (to_merge == NULL)
|
|
return NULL;
|
|
|
|
for (i = 0; i < n; i++) {
|
|
PyObject *base = PyTuple_GET_ITEM(bases, i);
|
|
PyObject *parentMRO;
|
|
if (PyType_Check(base))
|
|
parentMRO = PySequence_List(
|
|
((PyTypeObject*)base)->tp_mro);
|
|
else
|
|
parentMRO = classic_mro(base);
|
|
if (parentMRO == NULL) {
|
|
Py_DECREF(to_merge);
|
|
return NULL;
|
|
}
|
|
|
|
PyList_SET_ITEM(to_merge, i, parentMRO);
|
|
}
|
|
|
|
bases_aslist = PySequence_List(bases);
|
|
if (bases_aslist == NULL) {
|
|
Py_DECREF(to_merge);
|
|
return NULL;
|
|
}
|
|
/* This is just a basic sanity check. */
|
|
if (check_duplicates(bases_aslist) < 0) {
|
|
Py_DECREF(to_merge);
|
|
Py_DECREF(bases_aslist);
|
|
return NULL;
|
|
}
|
|
PyList_SET_ITEM(to_merge, n, bases_aslist);
|
|
|
|
result = Py_BuildValue("[O]", (PyObject *)type);
|
|
if (result == NULL) {
|
|
Py_DECREF(to_merge);
|
|
return NULL;
|
|
}
|
|
|
|
ok = pmerge(result, to_merge);
|
|
Py_DECREF(to_merge);
|
|
if (ok < 0) {
|
|
Py_DECREF(result);
|
|
return NULL;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static PyObject *
|
|
mro_external(PyObject *self)
|
|
{
|
|
PyTypeObject *type = (PyTypeObject *)self;
|
|
|
|
return mro_implementation(type);
|
|
}
|
|
|
|
static int
|
|
mro_internal(PyTypeObject *type)
|
|
{
|
|
PyObject *mro, *result, *tuple;
|
|
|
|
if (type->ob_type == &PyType_Type) {
|
|
result = mro_implementation(type);
|
|
}
|
|
else {
|
|
static PyObject *mro_str;
|
|
mro = lookup_method((PyObject *)type, "mro", &mro_str);
|
|
if (mro == NULL)
|
|
return -1;
|
|
result = PyObject_CallObject(mro, NULL);
|
|
Py_DECREF(mro);
|
|
}
|
|
if (result == NULL)
|
|
return -1;
|
|
tuple = PySequence_Tuple(result);
|
|
Py_DECREF(result);
|
|
type->tp_mro = tuple;
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* Calculate the best base amongst multiple base classes.
|
|
This is the first one that's on the path to the "solid base". */
|
|
|
|
static PyTypeObject *
|
|
best_base(PyObject *bases)
|
|
{
|
|
int i, n;
|
|
PyTypeObject *base, *winner, *candidate, *base_i;
|
|
PyObject *base_proto;
|
|
|
|
assert(PyTuple_Check(bases));
|
|
n = PyTuple_GET_SIZE(bases);
|
|
assert(n > 0);
|
|
base = NULL;
|
|
winner = NULL;
|
|
for (i = 0; i < n; i++) {
|
|
base_proto = PyTuple_GET_ITEM(bases, i);
|
|
if (PyClass_Check(base_proto))
|
|
continue;
|
|
if (!PyType_Check(base_proto)) {
|
|
PyErr_SetString(
|
|
PyExc_TypeError,
|
|
"bases must be types");
|
|
return NULL;
|
|
}
|
|
base_i = (PyTypeObject *)base_proto;
|
|
if (base_i->tp_dict == NULL) {
|
|
if (PyType_Ready(base_i) < 0)
|
|
return NULL;
|
|
}
|
|
candidate = solid_base(base_i);
|
|
if (winner == NULL) {
|
|
winner = candidate;
|
|
base = base_i;
|
|
}
|
|
else if (PyType_IsSubtype(winner, candidate))
|
|
;
|
|
else if (PyType_IsSubtype(candidate, winner)) {
|
|
winner = candidate;
|
|
base = base_i;
|
|
}
|
|
else {
|
|
PyErr_SetString(
|
|
PyExc_TypeError,
|
|
"multiple bases have "
|
|
"instance lay-out conflict");
|
|
return NULL;
|
|
}
|
|
}
|
|
if (base == NULL)
|
|
PyErr_SetString(PyExc_TypeError,
|
|
"a new-style class can't have only classic bases");
|
|
return base;
|
|
}
|
|
|
|
static int
|
|
extra_ivars(PyTypeObject *type, PyTypeObject *base)
|
|
{
|
|
size_t t_size = type->tp_basicsize;
|
|
size_t b_size = base->tp_basicsize;
|
|
|
|
assert(t_size >= b_size); /* Else type smaller than base! */
|
|
if (type->tp_itemsize || base->tp_itemsize) {
|
|
/* If itemsize is involved, stricter rules */
|
|
return t_size != b_size ||
|
|
type->tp_itemsize != base->tp_itemsize;
|
|
}
|
|
if (type->tp_weaklistoffset && base->tp_weaklistoffset == 0 &&
|
|
type->tp_weaklistoffset + sizeof(PyObject *) == t_size)
|
|
t_size -= sizeof(PyObject *);
|
|
if (type->tp_dictoffset && base->tp_dictoffset == 0 &&
|
|
type->tp_dictoffset + sizeof(PyObject *) == t_size)
|
|
t_size -= sizeof(PyObject *);
|
|
|
|
return t_size != b_size;
|
|
}
|
|
|
|
static PyTypeObject *
|
|
solid_base(PyTypeObject *type)
|
|
{
|
|
PyTypeObject *base;
|
|
|
|
if (type->tp_base)
|
|
base = solid_base(type->tp_base);
|
|
else
|
|
base = &PyBaseObject_Type;
|
|
if (extra_ivars(type, base))
|
|
return type;
|
|
else
|
|
return base;
|
|
}
|
|
|
|
static void object_dealloc(PyObject *);
|
|
static int object_init(PyObject *, PyObject *, PyObject *);
|
|
static int update_slot(PyTypeObject *, PyObject *);
|
|
static void fixup_slot_dispatchers(PyTypeObject *);
|
|
|
|
static PyObject *
|
|
subtype_dict(PyObject *obj, void *context)
|
|
{
|
|
PyObject **dictptr = _PyObject_GetDictPtr(obj);
|
|
PyObject *dict;
|
|
|
|
if (dictptr == NULL) {
|
|
PyErr_SetString(PyExc_AttributeError,
|
|
"This object has no __dict__");
|
|
return NULL;
|
|
}
|
|
dict = *dictptr;
|
|
if (dict == NULL)
|
|
*dictptr = dict = PyDict_New();
|
|
Py_XINCREF(dict);
|
|
return dict;
|
|
}
|
|
|
|
static int
|
|
subtype_setdict(PyObject *obj, PyObject *value, void *context)
|
|
{
|
|
PyObject **dictptr = _PyObject_GetDictPtr(obj);
|
|
PyObject *dict;
|
|
|
|
if (dictptr == NULL) {
|
|
PyErr_SetString(PyExc_AttributeError,
|
|
"This object has no __dict__");
|
|
return -1;
|
|
}
|
|
if (value != NULL && !PyDict_Check(value)) {
|
|
PyErr_SetString(PyExc_TypeError,
|
|
"__dict__ must be set to a dictionary");
|
|
return -1;
|
|
}
|
|
dict = *dictptr;
|
|
Py_XINCREF(value);
|
|
*dictptr = value;
|
|
Py_XDECREF(dict);
|
|
return 0;
|
|
}
|
|
|
|
static PyObject *
|
|
subtype_getweakref(PyObject *obj, void *context)
|
|
{
|
|
PyObject **weaklistptr;
|
|
PyObject *result;
|
|
|
|
if (obj->ob_type->tp_weaklistoffset == 0) {
|
|
PyErr_SetString(PyExc_AttributeError,
|
|
"This object has no __weaklist__");
|
|
return NULL;
|
|
}
|
|
assert(obj->ob_type->tp_weaklistoffset > 0);
|
|
assert(obj->ob_type->tp_weaklistoffset + sizeof(PyObject *) <=
|
|
(size_t)(obj->ob_type->tp_basicsize));
|
|
weaklistptr = (PyObject **)
|
|
((char *)obj + obj->ob_type->tp_weaklistoffset);
|
|
if (*weaklistptr == NULL)
|
|
result = Py_None;
|
|
else
|
|
result = *weaklistptr;
|
|
Py_INCREF(result);
|
|
return result;
|
|
}
|
|
|
|
static PyGetSetDef subtype_getsets[] = {
|
|
/* Not all objects have these attributes!
|
|
The descriptor's __get__ method may raise AttributeError. */
|
|
{"__dict__", subtype_dict, subtype_setdict,
|
|
PyDoc_STR("dictionary for instance variables (if defined)")},
|
|
{"__weakref__", subtype_getweakref, NULL,
|
|
PyDoc_STR("list of weak references to the object (if defined)")},
|
|
{0}
|
|
};
|
|
|
|
/* bozo: __getstate__ that raises TypeError */
|
|
|
|
static PyObject *
|
|
bozo_func(PyObject *self, PyObject *args)
|
|
{
|
|
PyErr_SetString(PyExc_TypeError,
|
|
"a class that defines __slots__ without "
|
|
"defining __getstate__ cannot be pickled");
|
|
return NULL;
|
|
}
|
|
|
|
static PyMethodDef bozo_ml = {"__getstate__", bozo_func, METH_VARARGS};
|
|
|
|
static PyObject *bozo_obj = NULL;
|
|
|
|
static int
|
|
valid_identifier(PyObject *s)
|
|
{
|
|
unsigned char *p;
|
|
int i, n;
|
|
|
|
if (!PyString_Check(s)) {
|
|
PyErr_SetString(PyExc_TypeError,
|
|
"__slots__ must be strings");
|
|
return 0;
|
|
}
|
|
p = (unsigned char *) PyString_AS_STRING(s);
|
|
n = PyString_GET_SIZE(s);
|
|
/* We must reject an empty name. As a hack, we bump the
|
|
length to 1 so that the loop will balk on the trailing \0. */
|
|
if (n == 0)
|
|
n = 1;
|
|
for (i = 0; i < n; i++, p++) {
|
|
if (!(i == 0 ? isalpha(*p) : isalnum(*p)) && *p != '_') {
|
|
PyErr_SetString(PyExc_TypeError,
|
|
"__slots__ must be identifiers");
|
|
return 0;
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
#ifdef Py_USING_UNICODE
|
|
/* Replace Unicode objects in slots. */
|
|
|
|
static PyObject *
|
|
_unicode_to_string(PyObject *slots, int nslots)
|
|
{
|
|
PyObject *tmp = slots;
|
|
PyObject *o, *o1;
|
|
int i;
|
|
intintargfunc copy = slots->ob_type->tp_as_sequence->sq_slice;
|
|
for (i = 0; i < nslots; i++) {
|
|
if (PyUnicode_Check(o = PyTuple_GET_ITEM(tmp, i))) {
|
|
if (tmp == slots) {
|
|
tmp = copy(slots, 0, PyTuple_GET_SIZE(slots));
|
|
if (tmp == NULL)
|
|
return NULL;
|
|
}
|
|
o1 = _PyUnicode_AsDefaultEncodedString
|
|
(o, NULL);
|
|
if (o1 == NULL) {
|
|
Py_DECREF(tmp);
|
|
return 0;
|
|
}
|
|
Py_INCREF(o1);
|
|
Py_DECREF(o);
|
|
PyTuple_SET_ITEM(tmp, i, o1);
|
|
}
|
|
}
|
|
return tmp;
|
|
}
|
|
#endif
|
|
|
|
static PyObject *
|
|
type_new(PyTypeObject *metatype, PyObject *args, PyObject *kwds)
|
|
{
|
|
PyObject *name, *bases, *dict;
|
|
static char *kwlist[] = {"name", "bases", "dict", 0};
|
|
PyObject *slots, *tmp, *newslots;
|
|
PyTypeObject *type, *base, *tmptype, *winner;
|
|
etype *et;
|
|
PyMemberDef *mp;
|
|
int i, nbases, nslots, slotoffset, add_dict, add_weak;
|
|
int j, may_add_dict, may_add_weak;
|
|
|
|
assert(args != NULL && PyTuple_Check(args));
|
|
assert(kwds == NULL || PyDict_Check(kwds));
|
|
|
|
/* Special case: type(x) should return x->ob_type */
|
|
{
|
|
const int nargs = PyTuple_GET_SIZE(args);
|
|
const int nkwds = kwds == NULL ? 0 : PyDict_Size(kwds);
|
|
|
|
if (PyType_CheckExact(metatype) && nargs == 1 && nkwds == 0) {
|
|
PyObject *x = PyTuple_GET_ITEM(args, 0);
|
|
Py_INCREF(x->ob_type);
|
|
return (PyObject *) x->ob_type;
|
|
}
|
|
|
|
/* SF bug 475327 -- if that didn't trigger, we need 3
|
|
arguments. but PyArg_ParseTupleAndKeywords below may give
|
|
a msg saying type() needs exactly 3. */
|
|
if (nargs + nkwds != 3) {
|
|
PyErr_SetString(PyExc_TypeError,
|
|
"type() takes 1 or 3 arguments");
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/* Check arguments: (name, bases, dict) */
|
|
if (!PyArg_ParseTupleAndKeywords(args, kwds, "SO!O!:type", kwlist,
|
|
&name,
|
|
&PyTuple_Type, &bases,
|
|
&PyDict_Type, &dict))
|
|
return NULL;
|
|
|
|
/* Determine the proper metatype to deal with this,
|
|
and check for metatype conflicts while we're at it.
|
|
Note that if some other metatype wins to contract,
|
|
it's possible that its instances are not types. */
|
|
nbases = PyTuple_GET_SIZE(bases);
|
|
winner = metatype;
|
|
for (i = 0; i < nbases; i++) {
|
|
tmp = PyTuple_GET_ITEM(bases, i);
|
|
tmptype = tmp->ob_type;
|
|
if (tmptype == &PyClass_Type)
|
|
continue; /* Special case classic classes */
|
|
if (PyType_IsSubtype(winner, tmptype))
|
|
continue;
|
|
if (PyType_IsSubtype(tmptype, winner)) {
|
|
winner = tmptype;
|
|
continue;
|
|
}
|
|
PyErr_SetString(PyExc_TypeError,
|
|
"metatype conflict among bases");
|
|
return NULL;
|
|
}
|
|
if (winner != metatype) {
|
|
if (winner->tp_new != type_new) /* Pass it to the winner */
|
|
return winner->tp_new(winner, args, kwds);
|
|
metatype = winner;
|
|
}
|
|
|
|
/* Adjust for empty tuple bases */
|
|
if (nbases == 0) {
|
|
bases = Py_BuildValue("(O)", &PyBaseObject_Type);
|
|
if (bases == NULL)
|
|
return NULL;
|
|
nbases = 1;
|
|
}
|
|
else
|
|
Py_INCREF(bases);
|
|
|
|
/* XXX From here until type is allocated, "return NULL" leaks bases! */
|
|
|
|
/* Calculate best base, and check that all bases are type objects */
|
|
base = best_base(bases);
|
|
if (base == NULL)
|
|
return NULL;
|
|
if (!PyType_HasFeature(base, Py_TPFLAGS_BASETYPE)) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"type '%.100s' is not an acceptable base type",
|
|
base->tp_name);
|
|
return NULL;
|
|
}
|
|
|
|
/* Check for a __slots__ sequence variable in dict, and count it */
|
|
slots = PyDict_GetItemString(dict, "__slots__");
|
|
nslots = 0;
|
|
add_dict = 0;
|
|
add_weak = 0;
|
|
may_add_dict = base->tp_dictoffset == 0;
|
|
may_add_weak = base->tp_weaklistoffset == 0 && base->tp_itemsize == 0;
|
|
if (slots == NULL) {
|
|
if (may_add_dict) {
|
|
add_dict++;
|
|
}
|
|
if (may_add_weak) {
|
|
add_weak++;
|
|
}
|
|
}
|
|
else {
|
|
/* Have slots */
|
|
|
|
/* Make it into a tuple */
|
|
if (PyString_Check(slots))
|
|
slots = Py_BuildValue("(O)", slots);
|
|
else
|
|
slots = PySequence_Tuple(slots);
|
|
if (slots == NULL)
|
|
return NULL;
|
|
assert(PyTuple_Check(slots));
|
|
|
|
/* Are slots allowed? */
|
|
nslots = PyTuple_GET_SIZE(slots);
|
|
if (nslots > 0 && base->tp_itemsize != 0) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"nonempty __slots__ "
|
|
"not supported for subtype of '%s'",
|
|
base->tp_name);
|
|
bad_slots:
|
|
Py_DECREF(slots);
|
|
return NULL;
|
|
}
|
|
|
|
#ifdef Py_USING_UNICODE
|
|
tmp = _unicode_to_string(slots, nslots);
|
|
if (tmp != slots) {
|
|
Py_DECREF(slots);
|
|
slots = tmp;
|
|
}
|
|
if (!tmp)
|
|
return NULL;
|
|
#endif
|
|
/* Check for valid slot names and two special cases */
|
|
for (i = 0; i < nslots; i++) {
|
|
PyObject *tmp = PyTuple_GET_ITEM(slots, i);
|
|
char *s;
|
|
if (!valid_identifier(tmp))
|
|
goto bad_slots;
|
|
assert(PyString_Check(tmp));
|
|
s = PyString_AS_STRING(tmp);
|
|
if (strcmp(s, "__dict__") == 0) {
|
|
if (!may_add_dict || add_dict) {
|
|
PyErr_SetString(PyExc_TypeError,
|
|
"__dict__ slot disallowed: "
|
|
"we already got one");
|
|
goto bad_slots;
|
|
}
|
|
add_dict++;
|
|
}
|
|
if (strcmp(s, "__weakref__") == 0) {
|
|
if (!may_add_weak || add_weak) {
|
|
PyErr_SetString(PyExc_TypeError,
|
|
"__weakref__ slot disallowed: "
|
|
"either we already got one, "
|
|
"or __itemsize__ != 0");
|
|
goto bad_slots;
|
|
}
|
|
add_weak++;
|
|
}
|
|
}
|
|
|
|
/* Copy slots into yet another tuple, demangling names */
|
|
newslots = PyTuple_New(nslots - add_dict - add_weak);
|
|
if (newslots == NULL)
|
|
goto bad_slots;
|
|
for (i = j = 0; i < nslots; i++) {
|
|
char *s;
|
|
char buffer[256];
|
|
tmp = PyTuple_GET_ITEM(slots, i);
|
|
s = PyString_AS_STRING(tmp);
|
|
if ((add_dict && strcmp(s, "__dict__") == 0) ||
|
|
(add_weak && strcmp(s, "__weakref__") == 0))
|
|
continue;
|
|
if (_Py_Mangle(PyString_AS_STRING(name),
|
|
PyString_AS_STRING(tmp),
|
|
buffer, sizeof(buffer)))
|
|
{
|
|
tmp = PyString_FromString(buffer);
|
|
} else {
|
|
Py_INCREF(tmp);
|
|
}
|
|
PyTuple_SET_ITEM(newslots, j, tmp);
|
|
j++;
|
|
}
|
|
assert(j == nslots - add_dict - add_weak);
|
|
nslots = j;
|
|
Py_DECREF(slots);
|
|
slots = newslots;
|
|
|
|
/* See if *this* class defines __getstate__ */
|
|
if (PyDict_GetItemString(dict, "__getstate__") == NULL) {
|
|
/* If not, provide a bozo that raises TypeError */
|
|
if (bozo_obj == NULL) {
|
|
bozo_obj = PyCFunction_New(&bozo_ml, NULL);
|
|
if (bozo_obj == NULL)
|
|
goto bad_slots;
|
|
}
|
|
if (PyDict_SetItemString(dict,
|
|
"__getstate__",
|
|
bozo_obj) < 0)
|
|
{
|
|
Py_DECREF(bozo_obj);
|
|
goto bad_slots;
|
|
}
|
|
}
|
|
|
|
/* Secondary bases may provide weakrefs or dict */
|
|
if (nbases > 1 &&
|
|
((may_add_dict && !add_dict) ||
|
|
(may_add_weak && !add_weak))) {
|
|
for (i = 0; i < nbases; i++) {
|
|
tmp = PyTuple_GET_ITEM(bases, i);
|
|
if (tmp == (PyObject *)base)
|
|
continue; /* Skip primary base */
|
|
if (PyClass_Check(tmp)) {
|
|
/* Classic base class provides both */
|
|
if (may_add_dict && !add_dict)
|
|
add_dict++;
|
|
if (may_add_weak && !add_weak)
|
|
add_weak++;
|
|
break;
|
|
}
|
|
assert(PyType_Check(tmp));
|
|
tmptype = (PyTypeObject *)tmp;
|
|
if (may_add_dict && !add_dict &&
|
|
tmptype->tp_dictoffset != 0)
|
|
add_dict++;
|
|
if (may_add_weak && !add_weak &&
|
|
tmptype->tp_weaklistoffset != 0)
|
|
add_weak++;
|
|
if (may_add_dict && !add_dict)
|
|
continue;
|
|
if (may_add_weak && !add_weak)
|
|
continue;
|
|
/* Nothing more to check */
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* XXX From here until type is safely allocated,
|
|
"return NULL" may leak slots! */
|
|
|
|
/* Allocate the type object */
|
|
type = (PyTypeObject *)metatype->tp_alloc(metatype, nslots);
|
|
if (type == NULL) {
|
|
Py_XDECREF(slots);
|
|
return NULL;
|
|
}
|
|
|
|
/* Keep name and slots alive in the extended type object */
|
|
et = (etype *)type;
|
|
Py_INCREF(name);
|
|
et->name = name;
|
|
et->slots = slots;
|
|
|
|
/* Initialize tp_flags */
|
|
type->tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HEAPTYPE |
|
|
Py_TPFLAGS_BASETYPE;
|
|
if (base->tp_flags & Py_TPFLAGS_HAVE_GC)
|
|
type->tp_flags |= Py_TPFLAGS_HAVE_GC;
|
|
|
|
/* It's a new-style number unless it specifically inherits any
|
|
old-style numeric behavior */
|
|
if ((base->tp_flags & Py_TPFLAGS_CHECKTYPES) ||
|
|
(base->tp_as_number == NULL))
|
|
type->tp_flags |= Py_TPFLAGS_CHECKTYPES;
|
|
|
|
/* Initialize essential fields */
|
|
type->tp_as_number = &et->as_number;
|
|
type->tp_as_sequence = &et->as_sequence;
|
|
type->tp_as_mapping = &et->as_mapping;
|
|
type->tp_as_buffer = &et->as_buffer;
|
|
type->tp_name = PyString_AS_STRING(name);
|
|
|
|
/* Set tp_base and tp_bases */
|
|
type->tp_bases = bases;
|
|
Py_INCREF(base);
|
|
type->tp_base = base;
|
|
|
|
/* Initialize tp_dict from passed-in dict */
|
|
type->tp_dict = dict = PyDict_Copy(dict);
|
|
if (dict == NULL) {
|
|
Py_DECREF(type);
|
|
return NULL;
|
|
}
|
|
|
|
/* Set __module__ in the dict */
|
|
if (PyDict_GetItemString(dict, "__module__") == NULL) {
|
|
tmp = PyEval_GetGlobals();
|
|
if (tmp != NULL) {
|
|
tmp = PyDict_GetItemString(tmp, "__name__");
|
|
if (tmp != NULL) {
|
|
if (PyDict_SetItemString(dict, "__module__",
|
|
tmp) < 0)
|
|
return NULL;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Set tp_doc to a copy of dict['__doc__'], if the latter is there
|
|
and is a string. The __doc__ accessor will first look for tp_doc;
|
|
if that fails, it will still look into __dict__.
|
|
*/
|
|
{
|
|
PyObject *doc = PyDict_GetItemString(dict, "__doc__");
|
|
if (doc != NULL && PyString_Check(doc)) {
|
|
const size_t n = (size_t)PyString_GET_SIZE(doc);
|
|
type->tp_doc = (char *)PyObject_MALLOC(n+1);
|
|
if (type->tp_doc == NULL) {
|
|
Py_DECREF(type);
|
|
return NULL;
|
|
}
|
|
memcpy(type->tp_doc, PyString_AS_STRING(doc), n+1);
|
|
}
|
|
}
|
|
|
|
/* Special-case __new__: if it's a plain function,
|
|
make it a static function */
|
|
tmp = PyDict_GetItemString(dict, "__new__");
|
|
if (tmp != NULL && PyFunction_Check(tmp)) {
|
|
tmp = PyStaticMethod_New(tmp);
|
|
if (tmp == NULL) {
|
|
Py_DECREF(type);
|
|
return NULL;
|
|
}
|
|
PyDict_SetItemString(dict, "__new__", tmp);
|
|
Py_DECREF(tmp);
|
|
}
|
|
|
|
/* Add descriptors for custom slots from __slots__, or for __dict__ */
|
|
mp = et->members;
|
|
slotoffset = base->tp_basicsize;
|
|
if (slots != NULL) {
|
|
for (i = 0; i < nslots; i++, mp++) {
|
|
mp->name = PyString_AS_STRING(
|
|
PyTuple_GET_ITEM(slots, i));
|
|
mp->type = T_OBJECT_EX;
|
|
mp->offset = slotoffset;
|
|
if (base->tp_weaklistoffset == 0 &&
|
|
strcmp(mp->name, "__weakref__") == 0) {
|
|
add_weak++;
|
|
mp->type = T_OBJECT;
|
|
mp->flags = READONLY;
|
|
type->tp_weaklistoffset = slotoffset;
|
|
}
|
|
slotoffset += sizeof(PyObject *);
|
|
}
|
|
}
|
|
if (add_dict) {
|
|
if (base->tp_itemsize)
|
|
type->tp_dictoffset = -(long)sizeof(PyObject *);
|
|
else
|
|
type->tp_dictoffset = slotoffset;
|
|
slotoffset += sizeof(PyObject *);
|
|
}
|
|
if (add_weak) {
|
|
assert(!base->tp_itemsize);
|
|
type->tp_weaklistoffset = slotoffset;
|
|
slotoffset += sizeof(PyObject *);
|
|
}
|
|
type->tp_basicsize = slotoffset;
|
|
type->tp_itemsize = base->tp_itemsize;
|
|
type->tp_members = et->members;
|
|
type->tp_getset = subtype_getsets;
|
|
|
|
/* Special case some slots */
|
|
if (type->tp_dictoffset != 0 || nslots > 0) {
|
|
if (base->tp_getattr == NULL && base->tp_getattro == NULL)
|
|
type->tp_getattro = PyObject_GenericGetAttr;
|
|
if (base->tp_setattr == NULL && base->tp_setattro == NULL)
|
|
type->tp_setattro = PyObject_GenericSetAttr;
|
|
}
|
|
type->tp_dealloc = subtype_dealloc;
|
|
|
|
/* Enable GC unless there are really no instance variables possible */
|
|
if (!(type->tp_basicsize == sizeof(PyObject) &&
|
|
type->tp_itemsize == 0))
|
|
type->tp_flags |= Py_TPFLAGS_HAVE_GC;
|
|
|
|
/* Always override allocation strategy to use regular heap */
|
|
type->tp_alloc = PyType_GenericAlloc;
|
|
if (type->tp_flags & Py_TPFLAGS_HAVE_GC) {
|
|
type->tp_free = PyObject_GC_Del;
|
|
type->tp_traverse = subtype_traverse;
|
|
type->tp_clear = subtype_clear;
|
|
}
|
|
else
|
|
type->tp_free = PyObject_Del;
|
|
|
|
/* Initialize the rest */
|
|
if (PyType_Ready(type) < 0) {
|
|
Py_DECREF(type);
|
|
return NULL;
|
|
}
|
|
|
|
/* Put the proper slots in place */
|
|
fixup_slot_dispatchers(type);
|
|
|
|
return (PyObject *)type;
|
|
}
|
|
|
|
/* Internal API to look for a name through the MRO.
|
|
This returns a borrowed reference, and doesn't set an exception! */
|
|
PyObject *
|
|
_PyType_Lookup(PyTypeObject *type, PyObject *name)
|
|
{
|
|
int i, n;
|
|
PyObject *mro, *res, *base, *dict;
|
|
|
|
/* Look in tp_dict of types in MRO */
|
|
mro = type->tp_mro;
|
|
|
|
/* If mro is NULL, the type is either not yet initialized
|
|
by PyType_Ready(), or already cleared by type_clear().
|
|
Either way the safest thing to do is to return NULL. */
|
|
if (mro == NULL)
|
|
return NULL;
|
|
|
|
assert(PyTuple_Check(mro));
|
|
n = PyTuple_GET_SIZE(mro);
|
|
for (i = 0; i < n; i++) {
|
|
base = PyTuple_GET_ITEM(mro, i);
|
|
if (PyClass_Check(base))
|
|
dict = ((PyClassObject *)base)->cl_dict;
|
|
else {
|
|
assert(PyType_Check(base));
|
|
dict = ((PyTypeObject *)base)->tp_dict;
|
|
}
|
|
assert(dict && PyDict_Check(dict));
|
|
res = PyDict_GetItem(dict, name);
|
|
if (res != NULL)
|
|
return res;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* This is similar to PyObject_GenericGetAttr(),
|
|
but uses _PyType_Lookup() instead of just looking in type->tp_dict. */
|
|
static PyObject *
|
|
type_getattro(PyTypeObject *type, PyObject *name)
|
|
{
|
|
PyTypeObject *metatype = type->ob_type;
|
|
PyObject *meta_attribute, *attribute;
|
|
descrgetfunc meta_get;
|
|
|
|
/* Initialize this type (we'll assume the metatype is initialized) */
|
|
if (type->tp_dict == NULL) {
|
|
if (PyType_Ready(type) < 0)
|
|
return NULL;
|
|
}
|
|
|
|
/* No readable descriptor found yet */
|
|
meta_get = NULL;
|
|
|
|
/* Look for the attribute in the metatype */
|
|
meta_attribute = _PyType_Lookup(metatype, name);
|
|
|
|
if (meta_attribute != NULL) {
|
|
meta_get = meta_attribute->ob_type->tp_descr_get;
|
|
|
|
if (meta_get != NULL && PyDescr_IsData(meta_attribute)) {
|
|
/* Data descriptors implement tp_descr_set to intercept
|
|
* writes. Assume the attribute is not overridden in
|
|
* type's tp_dict (and bases): call the descriptor now.
|
|
*/
|
|
return meta_get(meta_attribute, (PyObject *)type,
|
|
(PyObject *)metatype);
|
|
}
|
|
}
|
|
|
|
/* No data descriptor found on metatype. Look in tp_dict of this
|
|
* type and its bases */
|
|
attribute = _PyType_Lookup(type, name);
|
|
if (attribute != NULL) {
|
|
/* Implement descriptor functionality, if any */
|
|
descrgetfunc local_get = attribute->ob_type->tp_descr_get;
|
|
if (local_get != NULL) {
|
|
/* NULL 2nd argument indicates the descriptor was
|
|
* found on the target object itself (or a base) */
|
|
return local_get(attribute, (PyObject *)NULL,
|
|
(PyObject *)type);
|
|
}
|
|
|
|
Py_INCREF(attribute);
|
|
return attribute;
|
|
}
|
|
|
|
/* No attribute found in local __dict__ (or bases): use the
|
|
* descriptor from the metatype, if any */
|
|
if (meta_get != NULL)
|
|
return meta_get(meta_attribute, (PyObject *)type,
|
|
(PyObject *)metatype);
|
|
|
|
/* If an ordinary attribute was found on the metatype, return it now */
|
|
if (meta_attribute != NULL) {
|
|
Py_INCREF(meta_attribute);
|
|
return meta_attribute;
|
|
}
|
|
|
|
/* Give up */
|
|
PyErr_Format(PyExc_AttributeError,
|
|
"type object '%.50s' has no attribute '%.400s'",
|
|
type->tp_name, PyString_AS_STRING(name));
|
|
return NULL;
|
|
}
|
|
|
|
static int
|
|
type_setattro(PyTypeObject *type, PyObject *name, PyObject *value)
|
|
{
|
|
if (!(type->tp_flags & Py_TPFLAGS_HEAPTYPE)) {
|
|
PyErr_Format(
|
|
PyExc_TypeError,
|
|
"can't set attributes of built-in/extension type '%s'",
|
|
type->tp_name);
|
|
return -1;
|
|
}
|
|
if (PyObject_GenericSetAttr((PyObject *)type, name, value) < 0)
|
|
return -1;
|
|
return update_slot(type, name);
|
|
}
|
|
|
|
static void
|
|
type_dealloc(PyTypeObject *type)
|
|
{
|
|
etype *et;
|
|
|
|
/* Assert this is a heap-allocated type object */
|
|
assert(type->tp_flags & Py_TPFLAGS_HEAPTYPE);
|
|
_PyObject_GC_UNTRACK(type);
|
|
PyObject_ClearWeakRefs((PyObject *)type);
|
|
et = (etype *)type;
|
|
Py_XDECREF(type->tp_base);
|
|
Py_XDECREF(type->tp_dict);
|
|
Py_XDECREF(type->tp_bases);
|
|
Py_XDECREF(type->tp_mro);
|
|
Py_XDECREF(type->tp_cache);
|
|
Py_XDECREF(type->tp_subclasses);
|
|
PyObject_Free(type->tp_doc);
|
|
Py_XDECREF(et->name);
|
|
Py_XDECREF(et->slots);
|
|
type->ob_type->tp_free((PyObject *)type);
|
|
}
|
|
|
|
static PyObject *
|
|
type_subclasses(PyTypeObject *type, PyObject *args_ignored)
|
|
{
|
|
PyObject *list, *raw, *ref;
|
|
int i, n;
|
|
|
|
list = PyList_New(0);
|
|
if (list == NULL)
|
|
return NULL;
|
|
raw = type->tp_subclasses;
|
|
if (raw == NULL)
|
|
return list;
|
|
assert(PyList_Check(raw));
|
|
n = PyList_GET_SIZE(raw);
|
|
for (i = 0; i < n; i++) {
|
|
ref = PyList_GET_ITEM(raw, i);
|
|
assert(PyWeakref_CheckRef(ref));
|
|
ref = PyWeakref_GET_OBJECT(ref);
|
|
if (ref != Py_None) {
|
|
if (PyList_Append(list, ref) < 0) {
|
|
Py_DECREF(list);
|
|
return NULL;
|
|
}
|
|
}
|
|
}
|
|
return list;
|
|
}
|
|
|
|
static PyMethodDef type_methods[] = {
|
|
{"mro", (PyCFunction)mro_external, METH_NOARGS,
|
|
PyDoc_STR("mro() -> list\nreturn a type's method resolution order")},
|
|
{"__subclasses__", (PyCFunction)type_subclasses, METH_NOARGS,
|
|
PyDoc_STR("__subclasses__() -> list of immediate subclasses")},
|
|
{0}
|
|
};
|
|
|
|
PyDoc_STRVAR(type_doc,
|
|
"type(object) -> the object's type\n"
|
|
"type(name, bases, dict) -> a new type");
|
|
|
|
static int
|
|
type_traverse(PyTypeObject *type, visitproc visit, void *arg)
|
|
{
|
|
int err;
|
|
|
|
/* Because of type_is_gc(), the collector only calls this
|
|
for heaptypes. */
|
|
assert(type->tp_flags & Py_TPFLAGS_HEAPTYPE);
|
|
|
|
#define VISIT(SLOT) \
|
|
if (SLOT) { \
|
|
err = visit((PyObject *)(SLOT), arg); \
|
|
if (err) \
|
|
return err; \
|
|
}
|
|
|
|
VISIT(type->tp_dict);
|
|
VISIT(type->tp_cache);
|
|
VISIT(type->tp_mro);
|
|
VISIT(type->tp_bases);
|
|
VISIT(type->tp_base);
|
|
|
|
/* There's no need to visit type->tp_subclasses or
|
|
((etype *)type)->slots, because they can't be involved
|
|
in cycles; tp_subclasses is a list of weak references,
|
|
and slots is a tuple of strings. */
|
|
|
|
#undef VISIT
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
type_clear(PyTypeObject *type)
|
|
{
|
|
PyObject *tmp;
|
|
|
|
/* Because of type_is_gc(), the collector only calls this
|
|
for heaptypes. */
|
|
assert(type->tp_flags & Py_TPFLAGS_HEAPTYPE);
|
|
|
|
#define CLEAR(SLOT) \
|
|
if (SLOT) { \
|
|
tmp = (PyObject *)(SLOT); \
|
|
SLOT = NULL; \
|
|
Py_DECREF(tmp); \
|
|
}
|
|
|
|
/* The only field we need to clear is tp_mro, which is part of a
|
|
hard cycle (its first element is the class itself) that won't
|
|
be broken otherwise (it's a tuple and tuples don't have a
|
|
tp_clear handler). None of the other fields need to be
|
|
cleared, and here's why:
|
|
|
|
tp_dict:
|
|
It is a dict, so the collector will call its tp_clear.
|
|
|
|
tp_cache:
|
|
Not used; if it were, it would be a dict.
|
|
|
|
tp_bases, tp_base:
|
|
If these are involved in a cycle, there must be at least
|
|
one other, mutable object in the cycle, e.g. a base
|
|
class's dict; the cycle will be broken that way.
|
|
|
|
tp_subclasses:
|
|
A list of weak references can't be part of a cycle; and
|
|
lists have their own tp_clear.
|
|
|
|
slots (in etype):
|
|
A tuple of strings can't be part of a cycle.
|
|
*/
|
|
|
|
CLEAR(type->tp_mro);
|
|
|
|
#undef CLEAR
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
type_is_gc(PyTypeObject *type)
|
|
{
|
|
return type->tp_flags & Py_TPFLAGS_HEAPTYPE;
|
|
}
|
|
|
|
PyTypeObject PyType_Type = {
|
|
PyObject_HEAD_INIT(&PyType_Type)
|
|
0, /* ob_size */
|
|
"type", /* tp_name */
|
|
sizeof(etype), /* tp_basicsize */
|
|
sizeof(PyMemberDef), /* tp_itemsize */
|
|
(destructor)type_dealloc, /* tp_dealloc */
|
|
0, /* tp_print */
|
|
0, /* tp_getattr */
|
|
0, /* tp_setattr */
|
|
type_compare, /* tp_compare */
|
|
(reprfunc)type_repr, /* tp_repr */
|
|
0, /* tp_as_number */
|
|
0, /* tp_as_sequence */
|
|
0, /* tp_as_mapping */
|
|
(hashfunc)_Py_HashPointer, /* tp_hash */
|
|
(ternaryfunc)type_call, /* tp_call */
|
|
0, /* tp_str */
|
|
(getattrofunc)type_getattro, /* tp_getattro */
|
|
(setattrofunc)type_setattro, /* tp_setattro */
|
|
0, /* tp_as_buffer */
|
|
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
|
|
Py_TPFLAGS_BASETYPE, /* tp_flags */
|
|
type_doc, /* tp_doc */
|
|
(traverseproc)type_traverse, /* tp_traverse */
|
|
(inquiry)type_clear, /* tp_clear */
|
|
0, /* tp_richcompare */
|
|
offsetof(PyTypeObject, tp_weaklist), /* tp_weaklistoffset */
|
|
0, /* tp_iter */
|
|
0, /* tp_iternext */
|
|
type_methods, /* tp_methods */
|
|
type_members, /* tp_members */
|
|
type_getsets, /* tp_getset */
|
|
0, /* tp_base */
|
|
0, /* tp_dict */
|
|
0, /* tp_descr_get */
|
|
0, /* tp_descr_set */
|
|
offsetof(PyTypeObject, tp_dict), /* tp_dictoffset */
|
|
0, /* tp_init */
|
|
0, /* tp_alloc */
|
|
type_new, /* tp_new */
|
|
PyObject_GC_Del, /* tp_free */
|
|
(inquiry)type_is_gc, /* tp_is_gc */
|
|
};
|
|
|
|
|
|
/* The base type of all types (eventually)... except itself. */
|
|
|
|
static int
|
|
object_init(PyObject *self, PyObject *args, PyObject *kwds)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
object_dealloc(PyObject *self)
|
|
{
|
|
self->ob_type->tp_free(self);
|
|
}
|
|
|
|
static PyObject *
|
|
object_repr(PyObject *self)
|
|
{
|
|
PyTypeObject *type;
|
|
PyObject *mod, *name, *rtn;
|
|
|
|
type = self->ob_type;
|
|
mod = type_module(type, NULL);
|
|
if (mod == NULL)
|
|
PyErr_Clear();
|
|
else if (!PyString_Check(mod)) {
|
|
Py_DECREF(mod);
|
|
mod = NULL;
|
|
}
|
|
name = type_name(type, NULL);
|
|
if (name == NULL)
|
|
return NULL;
|
|
if (mod != NULL && strcmp(PyString_AS_STRING(mod), "__builtin__"))
|
|
rtn = PyString_FromFormat("<%s.%s object at %p>",
|
|
PyString_AS_STRING(mod),
|
|
PyString_AS_STRING(name),
|
|
self);
|
|
else
|
|
rtn = PyString_FromFormat("<%s object at %p>",
|
|
type->tp_name, self);
|
|
Py_XDECREF(mod);
|
|
Py_DECREF(name);
|
|
return rtn;
|
|
}
|
|
|
|
static PyObject *
|
|
object_str(PyObject *self)
|
|
{
|
|
unaryfunc f;
|
|
|
|
f = self->ob_type->tp_repr;
|
|
if (f == NULL)
|
|
f = object_repr;
|
|
return f(self);
|
|
}
|
|
|
|
static long
|
|
object_hash(PyObject *self)
|
|
{
|
|
return _Py_HashPointer(self);
|
|
}
|
|
|
|
static PyObject *
|
|
object_get_class(PyObject *self, void *closure)
|
|
{
|
|
Py_INCREF(self->ob_type);
|
|
return (PyObject *)(self->ob_type);
|
|
}
|
|
|
|
static int
|
|
equiv_structs(PyTypeObject *a, PyTypeObject *b)
|
|
{
|
|
return a == b ||
|
|
(a != NULL &&
|
|
b != NULL &&
|
|
a->tp_basicsize == b->tp_basicsize &&
|
|
a->tp_itemsize == b->tp_itemsize &&
|
|
a->tp_dictoffset == b->tp_dictoffset &&
|
|
a->tp_weaklistoffset == b->tp_weaklistoffset &&
|
|
((a->tp_flags & Py_TPFLAGS_HAVE_GC) ==
|
|
(b->tp_flags & Py_TPFLAGS_HAVE_GC)));
|
|
}
|
|
|
|
static int
|
|
same_slots_added(PyTypeObject *a, PyTypeObject *b)
|
|
{
|
|
PyTypeObject *base = a->tp_base;
|
|
int size;
|
|
|
|
if (base != b->tp_base)
|
|
return 0;
|
|
if (equiv_structs(a, base) && equiv_structs(b, base))
|
|
return 1;
|
|
size = base->tp_basicsize;
|
|
if (a->tp_dictoffset == size && b->tp_dictoffset == size)
|
|
size += sizeof(PyObject *);
|
|
if (a->tp_weaklistoffset == size && b->tp_weaklistoffset == size)
|
|
size += sizeof(PyObject *);
|
|
return size == a->tp_basicsize && size == b->tp_basicsize;
|
|
}
|
|
|
|
static int
|
|
compatible_for_assignment(PyTypeObject* old, PyTypeObject* new, char* attr)
|
|
{
|
|
PyTypeObject *newbase, *oldbase;
|
|
|
|
if (new->tp_dealloc != old->tp_dealloc ||
|
|
new->tp_free != old->tp_free)
|
|
{
|
|
PyErr_Format(PyExc_TypeError,
|
|
"%s assignment: "
|
|
"'%s' deallocator differs from '%s'",
|
|
attr,
|
|
new->tp_name,
|
|
old->tp_name);
|
|
return 0;
|
|
}
|
|
newbase = new;
|
|
oldbase = old;
|
|
while (equiv_structs(newbase, newbase->tp_base))
|
|
newbase = newbase->tp_base;
|
|
while (equiv_structs(oldbase, oldbase->tp_base))
|
|
oldbase = oldbase->tp_base;
|
|
if (newbase != oldbase &&
|
|
(newbase->tp_base != oldbase->tp_base ||
|
|
!same_slots_added(newbase, oldbase))) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"%s assignment: "
|
|
"'%s' object layout differs from '%s'",
|
|
attr,
|
|
new->tp_name,
|
|
old->tp_name);
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
object_set_class(PyObject *self, PyObject *value, void *closure)
|
|
{
|
|
PyTypeObject *old = self->ob_type;
|
|
PyTypeObject *new;
|
|
|
|
if (value == NULL) {
|
|
PyErr_SetString(PyExc_TypeError,
|
|
"can't delete __class__ attribute");
|
|
return -1;
|
|
}
|
|
if (!PyType_Check(value)) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"__class__ must be set to new-style class, not '%s' object",
|
|
value->ob_type->tp_name);
|
|
return -1;
|
|
}
|
|
new = (PyTypeObject *)value;
|
|
if (!(new->tp_flags & Py_TPFLAGS_HEAPTYPE) ||
|
|
!(old->tp_flags & Py_TPFLAGS_HEAPTYPE))
|
|
{
|
|
PyErr_Format(PyExc_TypeError,
|
|
"__class__ assignment: only for heap types");
|
|
return -1;
|
|
}
|
|
if (compatible_for_assignment(new, old, "__class__")) {
|
|
Py_INCREF(new);
|
|
self->ob_type = new;
|
|
Py_DECREF(old);
|
|
return 0;
|
|
}
|
|
else {
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
static PyGetSetDef object_getsets[] = {
|
|
{"__class__", object_get_class, object_set_class,
|
|
PyDoc_STR("the object's class")},
|
|
{0}
|
|
};
|
|
|
|
static PyObject *
|
|
object_reduce(PyObject *self, PyObject *args)
|
|
{
|
|
/* Call copy_reg._reduce(self) */
|
|
static PyObject *copy_reg_str;
|
|
PyObject *copy_reg, *res;
|
|
|
|
if (!copy_reg_str) {
|
|
copy_reg_str = PyString_InternFromString("copy_reg");
|
|
if (copy_reg_str == NULL)
|
|
return NULL;
|
|
}
|
|
copy_reg = PyImport_Import(copy_reg_str);
|
|
if (!copy_reg)
|
|
return NULL;
|
|
res = PyEval_CallMethod(copy_reg, "_reduce", "(O)", self);
|
|
Py_DECREF(copy_reg);
|
|
return res;
|
|
}
|
|
|
|
static PyMethodDef object_methods[] = {
|
|
{"__reduce__", object_reduce, METH_NOARGS,
|
|
PyDoc_STR("helper for pickle")},
|
|
{0}
|
|
};
|
|
|
|
PyTypeObject PyBaseObject_Type = {
|
|
PyObject_HEAD_INIT(&PyType_Type)
|
|
0, /* ob_size */
|
|
"object", /* tp_name */
|
|
sizeof(PyObject), /* tp_basicsize */
|
|
0, /* tp_itemsize */
|
|
(destructor)object_dealloc, /* tp_dealloc */
|
|
0, /* tp_print */
|
|
0, /* tp_getattr */
|
|
0, /* tp_setattr */
|
|
0, /* tp_compare */
|
|
object_repr, /* tp_repr */
|
|
0, /* tp_as_number */
|
|
0, /* tp_as_sequence */
|
|
0, /* tp_as_mapping */
|
|
object_hash, /* tp_hash */
|
|
0, /* tp_call */
|
|
object_str, /* tp_str */
|
|
PyObject_GenericGetAttr, /* tp_getattro */
|
|
PyObject_GenericSetAttr, /* tp_setattro */
|
|
0, /* tp_as_buffer */
|
|
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */
|
|
PyDoc_STR("The most base type"), /* tp_doc */
|
|
0, /* tp_traverse */
|
|
0, /* tp_clear */
|
|
0, /* tp_richcompare */
|
|
0, /* tp_weaklistoffset */
|
|
0, /* tp_iter */
|
|
0, /* tp_iternext */
|
|
object_methods, /* tp_methods */
|
|
0, /* tp_members */
|
|
object_getsets, /* tp_getset */
|
|
0, /* tp_base */
|
|
0, /* tp_dict */
|
|
0, /* tp_descr_get */
|
|
0, /* tp_descr_set */
|
|
0, /* tp_dictoffset */
|
|
object_init, /* tp_init */
|
|
PyType_GenericAlloc, /* tp_alloc */
|
|
PyType_GenericNew, /* tp_new */
|
|
PyObject_Del, /* tp_free */
|
|
};
|
|
|
|
|
|
/* Initialize the __dict__ in a type object */
|
|
|
|
static PyObject *
|
|
create_specialmethod(PyMethodDef *meth, PyObject *(*func)(PyObject *))
|
|
{
|
|
PyObject *cfunc;
|
|
PyObject *result;
|
|
|
|
cfunc = PyCFunction_New(meth, NULL);
|
|
if (cfunc == NULL)
|
|
return NULL;
|
|
result = func(cfunc);
|
|
Py_DECREF(cfunc);
|
|
return result;
|
|
}
|
|
|
|
static int
|
|
add_methods(PyTypeObject *type, PyMethodDef *meth)
|
|
{
|
|
PyObject *dict = type->tp_dict;
|
|
|
|
for (; meth->ml_name != NULL; meth++) {
|
|
PyObject *descr;
|
|
if (PyDict_GetItemString(dict, meth->ml_name))
|
|
continue;
|
|
if (meth->ml_flags & METH_CLASS) {
|
|
if (meth->ml_flags & METH_STATIC) {
|
|
PyErr_SetString(PyExc_ValueError,
|
|
"method cannot be both class and static");
|
|
return -1;
|
|
}
|
|
descr = create_specialmethod(meth, PyClassMethod_New);
|
|
}
|
|
else if (meth->ml_flags & METH_STATIC) {
|
|
descr = create_specialmethod(meth, PyStaticMethod_New);
|
|
}
|
|
else {
|
|
descr = PyDescr_NewMethod(type, meth);
|
|
}
|
|
if (descr == NULL)
|
|
return -1;
|
|
if (PyDict_SetItemString(dict, meth->ml_name, descr) < 0)
|
|
return -1;
|
|
Py_DECREF(descr);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
add_members(PyTypeObject *type, PyMemberDef *memb)
|
|
{
|
|
PyObject *dict = type->tp_dict;
|
|
|
|
for (; memb->name != NULL; memb++) {
|
|
PyObject *descr;
|
|
if (PyDict_GetItemString(dict, memb->name))
|
|
continue;
|
|
descr = PyDescr_NewMember(type, memb);
|
|
if (descr == NULL)
|
|
return -1;
|
|
if (PyDict_SetItemString(dict, memb->name, descr) < 0)
|
|
return -1;
|
|
Py_DECREF(descr);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
add_getset(PyTypeObject *type, PyGetSetDef *gsp)
|
|
{
|
|
PyObject *dict = type->tp_dict;
|
|
|
|
for (; gsp->name != NULL; gsp++) {
|
|
PyObject *descr;
|
|
if (PyDict_GetItemString(dict, gsp->name))
|
|
continue;
|
|
descr = PyDescr_NewGetSet(type, gsp);
|
|
|
|
if (descr == NULL)
|
|
return -1;
|
|
if (PyDict_SetItemString(dict, gsp->name, descr) < 0)
|
|
return -1;
|
|
Py_DECREF(descr);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
inherit_special(PyTypeObject *type, PyTypeObject *base)
|
|
{
|
|
int oldsize, newsize;
|
|
|
|
/* Special flag magic */
|
|
if (!type->tp_as_buffer && base->tp_as_buffer) {
|
|
type->tp_flags &= ~Py_TPFLAGS_HAVE_GETCHARBUFFER;
|
|
type->tp_flags |=
|
|
base->tp_flags & Py_TPFLAGS_HAVE_GETCHARBUFFER;
|
|
}
|
|
if (!type->tp_as_sequence && base->tp_as_sequence) {
|
|
type->tp_flags &= ~Py_TPFLAGS_HAVE_SEQUENCE_IN;
|
|
type->tp_flags |= base->tp_flags & Py_TPFLAGS_HAVE_SEQUENCE_IN;
|
|
}
|
|
if ((type->tp_flags & Py_TPFLAGS_HAVE_INPLACEOPS) !=
|
|
(base->tp_flags & Py_TPFLAGS_HAVE_INPLACEOPS)) {
|
|
if ((!type->tp_as_number && base->tp_as_number) ||
|
|
(!type->tp_as_sequence && base->tp_as_sequence)) {
|
|
type->tp_flags &= ~Py_TPFLAGS_HAVE_INPLACEOPS;
|
|
if (!type->tp_as_number && !type->tp_as_sequence) {
|
|
type->tp_flags |= base->tp_flags &
|
|
Py_TPFLAGS_HAVE_INPLACEOPS;
|
|
}
|
|
}
|
|
/* Wow */
|
|
}
|
|
if (!type->tp_as_number && base->tp_as_number) {
|
|
type->tp_flags &= ~Py_TPFLAGS_CHECKTYPES;
|
|
type->tp_flags |= base->tp_flags & Py_TPFLAGS_CHECKTYPES;
|
|
}
|
|
|
|
/* Copying basicsize is connected to the GC flags */
|
|
oldsize = base->tp_basicsize;
|
|
newsize = type->tp_basicsize ? type->tp_basicsize : oldsize;
|
|
if (!(type->tp_flags & Py_TPFLAGS_HAVE_GC) &&
|
|
(base->tp_flags & Py_TPFLAGS_HAVE_GC) &&
|
|
(type->tp_flags & Py_TPFLAGS_HAVE_RICHCOMPARE/*GC slots exist*/) &&
|
|
(!type->tp_traverse && !type->tp_clear)) {
|
|
type->tp_flags |= Py_TPFLAGS_HAVE_GC;
|
|
if (type->tp_traverse == NULL)
|
|
type->tp_traverse = base->tp_traverse;
|
|
if (type->tp_clear == NULL)
|
|
type->tp_clear = base->tp_clear;
|
|
}
|
|
if (type->tp_flags & base->tp_flags & Py_TPFLAGS_HAVE_CLASS) {
|
|
/* The condition below could use some explanation.
|
|
It appears that tp_new is not inherited for static types
|
|
whose base class is 'object'; this seems to be a precaution
|
|
so that old extension types don't suddenly become
|
|
callable (object.__new__ wouldn't insure the invariants
|
|
that the extension type's own factory function ensures).
|
|
Heap types, of course, are under our control, so they do
|
|
inherit tp_new; static extension types that specify some
|
|
other built-in type as the default are considered
|
|
new-style-aware so they also inherit object.__new__. */
|
|
if (base != &PyBaseObject_Type ||
|
|
(type->tp_flags & Py_TPFLAGS_HEAPTYPE)) {
|
|
if (type->tp_new == NULL)
|
|
type->tp_new = base->tp_new;
|
|
}
|
|
}
|
|
type->tp_basicsize = newsize;
|
|
|
|
/* Copy other non-function slots */
|
|
|
|
#undef COPYVAL
|
|
#define COPYVAL(SLOT) \
|
|
if (type->SLOT == 0) type->SLOT = base->SLOT
|
|
|
|
COPYVAL(tp_itemsize);
|
|
if (type->tp_flags & base->tp_flags & Py_TPFLAGS_HAVE_WEAKREFS) {
|
|
COPYVAL(tp_weaklistoffset);
|
|
}
|
|
if (type->tp_flags & base->tp_flags & Py_TPFLAGS_HAVE_CLASS) {
|
|
COPYVAL(tp_dictoffset);
|
|
}
|
|
}
|
|
|
|
static void
|
|
inherit_slots(PyTypeObject *type, PyTypeObject *base)
|
|
{
|
|
PyTypeObject *basebase;
|
|
|
|
#undef SLOTDEFINED
|
|
#undef COPYSLOT
|
|
#undef COPYNUM
|
|
#undef COPYSEQ
|
|
#undef COPYMAP
|
|
#undef COPYBUF
|
|
|
|
#define SLOTDEFINED(SLOT) \
|
|
(base->SLOT != 0 && \
|
|
(basebase == NULL || base->SLOT != basebase->SLOT))
|
|
|
|
#define COPYSLOT(SLOT) \
|
|
if (!type->SLOT && SLOTDEFINED(SLOT)) type->SLOT = base->SLOT
|
|
|
|
#define COPYNUM(SLOT) COPYSLOT(tp_as_number->SLOT)
|
|
#define COPYSEQ(SLOT) COPYSLOT(tp_as_sequence->SLOT)
|
|
#define COPYMAP(SLOT) COPYSLOT(tp_as_mapping->SLOT)
|
|
#define COPYBUF(SLOT) COPYSLOT(tp_as_buffer->SLOT)
|
|
|
|
/* This won't inherit indirect slots (from tp_as_number etc.)
|
|
if type doesn't provide the space. */
|
|
|
|
if (type->tp_as_number != NULL && base->tp_as_number != NULL) {
|
|
basebase = base->tp_base;
|
|
if (basebase->tp_as_number == NULL)
|
|
basebase = NULL;
|
|
COPYNUM(nb_add);
|
|
COPYNUM(nb_subtract);
|
|
COPYNUM(nb_multiply);
|
|
COPYNUM(nb_divide);
|
|
COPYNUM(nb_remainder);
|
|
COPYNUM(nb_divmod);
|
|
COPYNUM(nb_power);
|
|
COPYNUM(nb_negative);
|
|
COPYNUM(nb_positive);
|
|
COPYNUM(nb_absolute);
|
|
COPYNUM(nb_nonzero);
|
|
COPYNUM(nb_invert);
|
|
COPYNUM(nb_lshift);
|
|
COPYNUM(nb_rshift);
|
|
COPYNUM(nb_and);
|
|
COPYNUM(nb_xor);
|
|
COPYNUM(nb_or);
|
|
COPYNUM(nb_coerce);
|
|
COPYNUM(nb_int);
|
|
COPYNUM(nb_long);
|
|
COPYNUM(nb_float);
|
|
COPYNUM(nb_oct);
|
|
COPYNUM(nb_hex);
|
|
COPYNUM(nb_inplace_add);
|
|
COPYNUM(nb_inplace_subtract);
|
|
COPYNUM(nb_inplace_multiply);
|
|
COPYNUM(nb_inplace_divide);
|
|
COPYNUM(nb_inplace_remainder);
|
|
COPYNUM(nb_inplace_power);
|
|
COPYNUM(nb_inplace_lshift);
|
|
COPYNUM(nb_inplace_rshift);
|
|
COPYNUM(nb_inplace_and);
|
|
COPYNUM(nb_inplace_xor);
|
|
COPYNUM(nb_inplace_or);
|
|
if (base->tp_flags & Py_TPFLAGS_CHECKTYPES) {
|
|
COPYNUM(nb_true_divide);
|
|
COPYNUM(nb_floor_divide);
|
|
COPYNUM(nb_inplace_true_divide);
|
|
COPYNUM(nb_inplace_floor_divide);
|
|
}
|
|
}
|
|
|
|
if (type->tp_as_sequence != NULL && base->tp_as_sequence != NULL) {
|
|
basebase = base->tp_base;
|
|
if (basebase->tp_as_sequence == NULL)
|
|
basebase = NULL;
|
|
COPYSEQ(sq_length);
|
|
COPYSEQ(sq_concat);
|
|
COPYSEQ(sq_repeat);
|
|
COPYSEQ(sq_item);
|
|
COPYSEQ(sq_slice);
|
|
COPYSEQ(sq_ass_item);
|
|
COPYSEQ(sq_ass_slice);
|
|
COPYSEQ(sq_contains);
|
|
COPYSEQ(sq_inplace_concat);
|
|
COPYSEQ(sq_inplace_repeat);
|
|
}
|
|
|
|
if (type->tp_as_mapping != NULL && base->tp_as_mapping != NULL) {
|
|
basebase = base->tp_base;
|
|
if (basebase->tp_as_mapping == NULL)
|
|
basebase = NULL;
|
|
COPYMAP(mp_length);
|
|
COPYMAP(mp_subscript);
|
|
COPYMAP(mp_ass_subscript);
|
|
}
|
|
|
|
if (type->tp_as_buffer != NULL && base->tp_as_buffer != NULL) {
|
|
basebase = base->tp_base;
|
|
if (basebase->tp_as_buffer == NULL)
|
|
basebase = NULL;
|
|
COPYBUF(bf_getreadbuffer);
|
|
COPYBUF(bf_getwritebuffer);
|
|
COPYBUF(bf_getsegcount);
|
|
COPYBUF(bf_getcharbuffer);
|
|
}
|
|
|
|
basebase = base->tp_base;
|
|
|
|
COPYSLOT(tp_dealloc);
|
|
COPYSLOT(tp_print);
|
|
if (type->tp_getattr == NULL && type->tp_getattro == NULL) {
|
|
type->tp_getattr = base->tp_getattr;
|
|
type->tp_getattro = base->tp_getattro;
|
|
}
|
|
if (type->tp_setattr == NULL && type->tp_setattro == NULL) {
|
|
type->tp_setattr = base->tp_setattr;
|
|
type->tp_setattro = base->tp_setattro;
|
|
}
|
|
/* tp_compare see tp_richcompare */
|
|
COPYSLOT(tp_repr);
|
|
/* tp_hash see tp_richcompare */
|
|
COPYSLOT(tp_call);
|
|
COPYSLOT(tp_str);
|
|
if (type->tp_flags & base->tp_flags & Py_TPFLAGS_HAVE_RICHCOMPARE) {
|
|
if (type->tp_compare == NULL &&
|
|
type->tp_richcompare == NULL &&
|
|
type->tp_hash == NULL)
|
|
{
|
|
type->tp_compare = base->tp_compare;
|
|
type->tp_richcompare = base->tp_richcompare;
|
|
type->tp_hash = base->tp_hash;
|
|
}
|
|
}
|
|
else {
|
|
COPYSLOT(tp_compare);
|
|
}
|
|
if (type->tp_flags & base->tp_flags & Py_TPFLAGS_HAVE_ITER) {
|
|
COPYSLOT(tp_iter);
|
|
COPYSLOT(tp_iternext);
|
|
}
|
|
if (type->tp_flags & base->tp_flags & Py_TPFLAGS_HAVE_CLASS) {
|
|
COPYSLOT(tp_descr_get);
|
|
COPYSLOT(tp_descr_set);
|
|
COPYSLOT(tp_dictoffset);
|
|
COPYSLOT(tp_init);
|
|
COPYSLOT(tp_alloc);
|
|
COPYSLOT(tp_free);
|
|
COPYSLOT(tp_is_gc);
|
|
}
|
|
}
|
|
|
|
static int add_operators(PyTypeObject *);
|
|
|
|
int
|
|
PyType_Ready(PyTypeObject *type)
|
|
{
|
|
PyObject *dict, *bases;
|
|
PyTypeObject *base;
|
|
int i, n;
|
|
|
|
if (type->tp_flags & Py_TPFLAGS_READY) {
|
|
assert(type->tp_dict != NULL);
|
|
return 0;
|
|
}
|
|
assert((type->tp_flags & Py_TPFLAGS_READYING) == 0);
|
|
|
|
type->tp_flags |= Py_TPFLAGS_READYING;
|
|
|
|
/* Initialize tp_base (defaults to BaseObject unless that's us) */
|
|
base = type->tp_base;
|
|
if (base == NULL && type != &PyBaseObject_Type)
|
|
base = type->tp_base = &PyBaseObject_Type;
|
|
|
|
/* Initialize the base class */
|
|
if (base && base->tp_dict == NULL) {
|
|
if (PyType_Ready(base) < 0)
|
|
goto error;
|
|
}
|
|
|
|
/* Initialize ob_type if NULL. This means extensions that want to be
|
|
compilable separately on Windows can call PyType_Ready() instead of
|
|
initializing the ob_type field of their type objects. */
|
|
if (type->ob_type == NULL)
|
|
type->ob_type = base->ob_type;
|
|
|
|
/* Initialize tp_bases */
|
|
bases = type->tp_bases;
|
|
if (bases == NULL) {
|
|
if (base == NULL)
|
|
bases = PyTuple_New(0);
|
|
else
|
|
bases = Py_BuildValue("(O)", base);
|
|
if (bases == NULL)
|
|
goto error;
|
|
type->tp_bases = bases;
|
|
}
|
|
|
|
/* Initialize tp_dict */
|
|
dict = type->tp_dict;
|
|
if (dict == NULL) {
|
|
dict = PyDict_New();
|
|
if (dict == NULL)
|
|
goto error;
|
|
type->tp_dict = dict;
|
|
}
|
|
|
|
/* Add type-specific descriptors to tp_dict */
|
|
if (add_operators(type) < 0)
|
|
goto error;
|
|
if (type->tp_methods != NULL) {
|
|
if (add_methods(type, type->tp_methods) < 0)
|
|
goto error;
|
|
}
|
|
if (type->tp_members != NULL) {
|
|
if (add_members(type, type->tp_members) < 0)
|
|
goto error;
|
|
}
|
|
if (type->tp_getset != NULL) {
|
|
if (add_getset(type, type->tp_getset) < 0)
|
|
goto error;
|
|
}
|
|
|
|
/* Calculate method resolution order */
|
|
if (mro_internal(type) < 0) {
|
|
goto error;
|
|
}
|
|
|
|
/* Inherit special flags from dominant base */
|
|
if (type->tp_base != NULL)
|
|
inherit_special(type, type->tp_base);
|
|
|
|
/* Initialize tp_dict properly */
|
|
bases = type->tp_mro;
|
|
assert(bases != NULL);
|
|
assert(PyTuple_Check(bases));
|
|
n = PyTuple_GET_SIZE(bases);
|
|
for (i = 1; i < n; i++) {
|
|
PyObject *b = PyTuple_GET_ITEM(bases, i);
|
|
if (PyType_Check(b))
|
|
inherit_slots(type, (PyTypeObject *)b);
|
|
}
|
|
|
|
/* if the type dictionary doesn't contain a __doc__, set it from
|
|
the tp_doc slot.
|
|
*/
|
|
if (PyDict_GetItemString(type->tp_dict, "__doc__") == NULL) {
|
|
if (type->tp_doc != NULL) {
|
|
PyObject *doc = PyString_FromString(type->tp_doc);
|
|
PyDict_SetItemString(type->tp_dict, "__doc__", doc);
|
|
Py_DECREF(doc);
|
|
} else {
|
|
PyDict_SetItemString(type->tp_dict,
|
|
"__doc__", Py_None);
|
|
}
|
|
}
|
|
|
|
/* Some more special stuff */
|
|
base = type->tp_base;
|
|
if (base != NULL) {
|
|
if (type->tp_as_number == NULL)
|
|
type->tp_as_number = base->tp_as_number;
|
|
if (type->tp_as_sequence == NULL)
|
|
type->tp_as_sequence = base->tp_as_sequence;
|
|
if (type->tp_as_mapping == NULL)
|
|
type->tp_as_mapping = base->tp_as_mapping;
|
|
}
|
|
|
|
/* Link into each base class's list of subclasses */
|
|
bases = type->tp_bases;
|
|
n = PyTuple_GET_SIZE(bases);
|
|
for (i = 0; i < n; i++) {
|
|
PyObject *b = PyTuple_GET_ITEM(bases, i);
|
|
if (PyType_Check(b) &&
|
|
add_subclass((PyTypeObject *)b, type) < 0)
|
|
goto error;
|
|
}
|
|
|
|
/* All done -- set the ready flag */
|
|
assert(type->tp_dict != NULL);
|
|
type->tp_flags =
|
|
(type->tp_flags & ~Py_TPFLAGS_READYING) | Py_TPFLAGS_READY;
|
|
return 0;
|
|
|
|
error:
|
|
type->tp_flags &= ~Py_TPFLAGS_READYING;
|
|
return -1;
|
|
}
|
|
|
|
static int
|
|
add_subclass(PyTypeObject *base, PyTypeObject *type)
|
|
{
|
|
int i;
|
|
PyObject *list, *ref, *new;
|
|
|
|
list = base->tp_subclasses;
|
|
if (list == NULL) {
|
|
base->tp_subclasses = list = PyList_New(0);
|
|
if (list == NULL)
|
|
return -1;
|
|
}
|
|
assert(PyList_Check(list));
|
|
new = PyWeakref_NewRef((PyObject *)type, NULL);
|
|
i = PyList_GET_SIZE(list);
|
|
while (--i >= 0) {
|
|
ref = PyList_GET_ITEM(list, i);
|
|
assert(PyWeakref_CheckRef(ref));
|
|
if (PyWeakref_GET_OBJECT(ref) == Py_None)
|
|
return PyList_SetItem(list, i, new);
|
|
}
|
|
i = PyList_Append(list, new);
|
|
Py_DECREF(new);
|
|
return i;
|
|
}
|
|
|
|
static void
|
|
remove_subclass(PyTypeObject *base, PyTypeObject *type)
|
|
{
|
|
int i;
|
|
PyObject *list, *ref;
|
|
|
|
list = base->tp_subclasses;
|
|
if (list == NULL) {
|
|
return;
|
|
}
|
|
assert(PyList_Check(list));
|
|
i = PyList_GET_SIZE(list);
|
|
while (--i >= 0) {
|
|
ref = PyList_GET_ITEM(list, i);
|
|
assert(PyWeakref_CheckRef(ref));
|
|
if (PyWeakref_GET_OBJECT(ref) == (PyObject*)type) {
|
|
/* this can't fail, right? */
|
|
PySequence_DelItem(list, i);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Generic wrappers for overloadable 'operators' such as __getitem__ */
|
|
|
|
/* There's a wrapper *function* for each distinct function typedef used
|
|
for type object slots (e.g. binaryfunc, ternaryfunc, etc.). There's a
|
|
wrapper *table* for each distinct operation (e.g. __len__, __add__).
|
|
Most tables have only one entry; the tables for binary operators have two
|
|
entries, one regular and one with reversed arguments. */
|
|
|
|
static PyObject *
|
|
wrap_inquiry(PyObject *self, PyObject *args, void *wrapped)
|
|
{
|
|
inquiry func = (inquiry)wrapped;
|
|
int res;
|
|
|
|
if (!PyArg_ParseTuple(args, ""))
|
|
return NULL;
|
|
res = (*func)(self);
|
|
if (res == -1 && PyErr_Occurred())
|
|
return NULL;
|
|
return PyInt_FromLong((long)res);
|
|
}
|
|
|
|
static PyObject *
|
|
wrap_binaryfunc(PyObject *self, PyObject *args, void *wrapped)
|
|
{
|
|
binaryfunc func = (binaryfunc)wrapped;
|
|
PyObject *other;
|
|
|
|
if (!PyArg_ParseTuple(args, "O", &other))
|
|
return NULL;
|
|
return (*func)(self, other);
|
|
}
|
|
|
|
static PyObject *
|
|
wrap_binaryfunc_l(PyObject *self, PyObject *args, void *wrapped)
|
|
{
|
|
binaryfunc func = (binaryfunc)wrapped;
|
|
PyObject *other;
|
|
|
|
if (!PyArg_ParseTuple(args, "O", &other))
|
|
return NULL;
|
|
if (!(self->ob_type->tp_flags & Py_TPFLAGS_CHECKTYPES) &&
|
|
!PyType_IsSubtype(other->ob_type, self->ob_type)) {
|
|
Py_INCREF(Py_NotImplemented);
|
|
return Py_NotImplemented;
|
|
}
|
|
return (*func)(self, other);
|
|
}
|
|
|
|
static PyObject *
|
|
wrap_binaryfunc_r(PyObject *self, PyObject *args, void *wrapped)
|
|
{
|
|
binaryfunc func = (binaryfunc)wrapped;
|
|
PyObject *other;
|
|
|
|
if (!PyArg_ParseTuple(args, "O", &other))
|
|
return NULL;
|
|
if (!(self->ob_type->tp_flags & Py_TPFLAGS_CHECKTYPES) &&
|
|
!PyType_IsSubtype(other->ob_type, self->ob_type)) {
|
|
Py_INCREF(Py_NotImplemented);
|
|
return Py_NotImplemented;
|
|
}
|
|
return (*func)(other, self);
|
|
}
|
|
|
|
static PyObject *
|
|
wrap_coercefunc(PyObject *self, PyObject *args, void *wrapped)
|
|
{
|
|
coercion func = (coercion)wrapped;
|
|
PyObject *other, *res;
|
|
int ok;
|
|
|
|
if (!PyArg_ParseTuple(args, "O", &other))
|
|
return NULL;
|
|
ok = func(&self, &other);
|
|
if (ok < 0)
|
|
return NULL;
|
|
if (ok > 0) {
|
|
Py_INCREF(Py_NotImplemented);
|
|
return Py_NotImplemented;
|
|
}
|
|
res = PyTuple_New(2);
|
|
if (res == NULL) {
|
|
Py_DECREF(self);
|
|
Py_DECREF(other);
|
|
return NULL;
|
|
}
|
|
PyTuple_SET_ITEM(res, 0, self);
|
|
PyTuple_SET_ITEM(res, 1, other);
|
|
return res;
|
|
}
|
|
|
|
static PyObject *
|
|
wrap_ternaryfunc(PyObject *self, PyObject *args, void *wrapped)
|
|
{
|
|
ternaryfunc func = (ternaryfunc)wrapped;
|
|
PyObject *other;
|
|
PyObject *third = Py_None;
|
|
|
|
/* Note: This wrapper only works for __pow__() */
|
|
|
|
if (!PyArg_ParseTuple(args, "O|O", &other, &third))
|
|
return NULL;
|
|
return (*func)(self, other, third);
|
|
}
|
|
|
|
static PyObject *
|
|
wrap_ternaryfunc_r(PyObject *self, PyObject *args, void *wrapped)
|
|
{
|
|
ternaryfunc func = (ternaryfunc)wrapped;
|
|
PyObject *other;
|
|
PyObject *third = Py_None;
|
|
|
|
/* Note: This wrapper only works for __pow__() */
|
|
|
|
if (!PyArg_ParseTuple(args, "O|O", &other, &third))
|
|
return NULL;
|
|
return (*func)(other, self, third);
|
|
}
|
|
|
|
static PyObject *
|
|
wrap_unaryfunc(PyObject *self, PyObject *args, void *wrapped)
|
|
{
|
|
unaryfunc func = (unaryfunc)wrapped;
|
|
|
|
if (!PyArg_ParseTuple(args, ""))
|
|
return NULL;
|
|
return (*func)(self);
|
|
}
|
|
|
|
static PyObject *
|
|
wrap_intargfunc(PyObject *self, PyObject *args, void *wrapped)
|
|
{
|
|
intargfunc func = (intargfunc)wrapped;
|
|
int i;
|
|
|
|
if (!PyArg_ParseTuple(args, "i", &i))
|
|
return NULL;
|
|
return (*func)(self, i);
|
|
}
|
|
|
|
static int
|
|
getindex(PyObject *self, PyObject *arg)
|
|
{
|
|
int i;
|
|
|
|
i = PyInt_AsLong(arg);
|
|
if (i == -1 && PyErr_Occurred())
|
|
return -1;
|
|
if (i < 0) {
|
|
PySequenceMethods *sq = self->ob_type->tp_as_sequence;
|
|
if (sq && sq->sq_length) {
|
|
int n = (*sq->sq_length)(self);
|
|
if (n < 0)
|
|
return -1;
|
|
i += n;
|
|
}
|
|
}
|
|
return i;
|
|
}
|
|
|
|
static PyObject *
|
|
wrap_sq_item(PyObject *self, PyObject *args, void *wrapped)
|
|
{
|
|
intargfunc func = (intargfunc)wrapped;
|
|
PyObject *arg;
|
|
int i;
|
|
|
|
if (PyTuple_GET_SIZE(args) == 1) {
|
|
arg = PyTuple_GET_ITEM(args, 0);
|
|
i = getindex(self, arg);
|
|
if (i == -1 && PyErr_Occurred())
|
|
return NULL;
|
|
return (*func)(self, i);
|
|
}
|
|
PyArg_ParseTuple(args, "O", &arg);
|
|
assert(PyErr_Occurred());
|
|
return NULL;
|
|
}
|
|
|
|
static PyObject *
|
|
wrap_intintargfunc(PyObject *self, PyObject *args, void *wrapped)
|
|
{
|
|
intintargfunc func = (intintargfunc)wrapped;
|
|
int i, j;
|
|
|
|
if (!PyArg_ParseTuple(args, "ii", &i, &j))
|
|
return NULL;
|
|
return (*func)(self, i, j);
|
|
}
|
|
|
|
static PyObject *
|
|
wrap_sq_setitem(PyObject *self, PyObject *args, void *wrapped)
|
|
{
|
|
intobjargproc func = (intobjargproc)wrapped;
|
|
int i, res;
|
|
PyObject *arg, *value;
|
|
|
|
if (!PyArg_ParseTuple(args, "OO", &arg, &value))
|
|
return NULL;
|
|
i = getindex(self, arg);
|
|
if (i == -1 && PyErr_Occurred())
|
|
return NULL;
|
|
res = (*func)(self, i, value);
|
|
if (res == -1 && PyErr_Occurred())
|
|
return NULL;
|
|
Py_INCREF(Py_None);
|
|
return Py_None;
|
|
}
|
|
|
|
static PyObject *
|
|
wrap_sq_delitem(PyObject *self, PyObject *args, void *wrapped)
|
|
{
|
|
intobjargproc func = (intobjargproc)wrapped;
|
|
int i, res;
|
|
PyObject *arg;
|
|
|
|
if (!PyArg_ParseTuple(args, "O", &arg))
|
|
return NULL;
|
|
i = getindex(self, arg);
|
|
if (i == -1 && PyErr_Occurred())
|
|
return NULL;
|
|
res = (*func)(self, i, NULL);
|
|
if (res == -1 && PyErr_Occurred())
|
|
return NULL;
|
|
Py_INCREF(Py_None);
|
|
return Py_None;
|
|
}
|
|
|
|
static PyObject *
|
|
wrap_intintobjargproc(PyObject *self, PyObject *args, void *wrapped)
|
|
{
|
|
intintobjargproc func = (intintobjargproc)wrapped;
|
|
int i, j, res;
|
|
PyObject *value;
|
|
|
|
if (!PyArg_ParseTuple(args, "iiO", &i, &j, &value))
|
|
return NULL;
|
|
res = (*func)(self, i, j, value);
|
|
if (res == -1 && PyErr_Occurred())
|
|
return NULL;
|
|
Py_INCREF(Py_None);
|
|
return Py_None;
|
|
}
|
|
|
|
static PyObject *
|
|
wrap_delslice(PyObject *self, PyObject *args, void *wrapped)
|
|
{
|
|
intintobjargproc func = (intintobjargproc)wrapped;
|
|
int i, j, res;
|
|
|
|
if (!PyArg_ParseTuple(args, "ii", &i, &j))
|
|
return NULL;
|
|
res = (*func)(self, i, j, NULL);
|
|
if (res == -1 && PyErr_Occurred())
|
|
return NULL;
|
|
Py_INCREF(Py_None);
|
|
return Py_None;
|
|
}
|
|
|
|
/* XXX objobjproc is a misnomer; should be objargpred */
|
|
static PyObject *
|
|
wrap_objobjproc(PyObject *self, PyObject *args, void *wrapped)
|
|
{
|
|
objobjproc func = (objobjproc)wrapped;
|
|
int res;
|
|
PyObject *value;
|
|
|
|
if (!PyArg_ParseTuple(args, "O", &value))
|
|
return NULL;
|
|
res = (*func)(self, value);
|
|
if (res == -1 && PyErr_Occurred())
|
|
return NULL;
|
|
return PyInt_FromLong((long)res);
|
|
}
|
|
|
|
static PyObject *
|
|
wrap_objobjargproc(PyObject *self, PyObject *args, void *wrapped)
|
|
{
|
|
objobjargproc func = (objobjargproc)wrapped;
|
|
int res;
|
|
PyObject *key, *value;
|
|
|
|
if (!PyArg_ParseTuple(args, "OO", &key, &value))
|
|
return NULL;
|
|
res = (*func)(self, key, value);
|
|
if (res == -1 && PyErr_Occurred())
|
|
return NULL;
|
|
Py_INCREF(Py_None);
|
|
return Py_None;
|
|
}
|
|
|
|
static PyObject *
|
|
wrap_delitem(PyObject *self, PyObject *args, void *wrapped)
|
|
{
|
|
objobjargproc func = (objobjargproc)wrapped;
|
|
int res;
|
|
PyObject *key;
|
|
|
|
if (!PyArg_ParseTuple(args, "O", &key))
|
|
return NULL;
|
|
res = (*func)(self, key, NULL);
|
|
if (res == -1 && PyErr_Occurred())
|
|
return NULL;
|
|
Py_INCREF(Py_None);
|
|
return Py_None;
|
|
}
|
|
|
|
static PyObject *
|
|
wrap_cmpfunc(PyObject *self, PyObject *args, void *wrapped)
|
|
{
|
|
cmpfunc func = (cmpfunc)wrapped;
|
|
int res;
|
|
PyObject *other;
|
|
|
|
if (!PyArg_ParseTuple(args, "O", &other))
|
|
return NULL;
|
|
if (other->ob_type->tp_compare != func &&
|
|
!PyType_IsSubtype(other->ob_type, self->ob_type)) {
|
|
PyErr_Format(
|
|
PyExc_TypeError,
|
|
"%s.__cmp__(x,y) requires y to be a '%s', not a '%s'",
|
|
self->ob_type->tp_name,
|
|
self->ob_type->tp_name,
|
|
other->ob_type->tp_name);
|
|
return NULL;
|
|
}
|
|
res = (*func)(self, other);
|
|
if (PyErr_Occurred())
|
|
return NULL;
|
|
return PyInt_FromLong((long)res);
|
|
}
|
|
|
|
static PyObject *
|
|
wrap_setattr(PyObject *self, PyObject *args, void *wrapped)
|
|
{
|
|
setattrofunc func = (setattrofunc)wrapped;
|
|
int res;
|
|
PyObject *name, *value;
|
|
|
|
if (!PyArg_ParseTuple(args, "OO", &name, &value))
|
|
return NULL;
|
|
res = (*func)(self, name, value);
|
|
if (res < 0)
|
|
return NULL;
|
|
Py_INCREF(Py_None);
|
|
return Py_None;
|
|
}
|
|
|
|
static PyObject *
|
|
wrap_delattr(PyObject *self, PyObject *args, void *wrapped)
|
|
{
|
|
setattrofunc func = (setattrofunc)wrapped;
|
|
int res;
|
|
PyObject *name;
|
|
|
|
if (!PyArg_ParseTuple(args, "O", &name))
|
|
return NULL;
|
|
res = (*func)(self, name, NULL);
|
|
if (res < 0)
|
|
return NULL;
|
|
Py_INCREF(Py_None);
|
|
return Py_None;
|
|
}
|
|
|
|
static PyObject *
|
|
wrap_hashfunc(PyObject *self, PyObject *args, void *wrapped)
|
|
{
|
|
hashfunc func = (hashfunc)wrapped;
|
|
long res;
|
|
|
|
if (!PyArg_ParseTuple(args, ""))
|
|
return NULL;
|
|
res = (*func)(self);
|
|
if (res == -1 && PyErr_Occurred())
|
|
return NULL;
|
|
return PyInt_FromLong(res);
|
|
}
|
|
|
|
static PyObject *
|
|
wrap_call(PyObject *self, PyObject *args, void *wrapped, PyObject *kwds)
|
|
{
|
|
ternaryfunc func = (ternaryfunc)wrapped;
|
|
|
|
return (*func)(self, args, kwds);
|
|
}
|
|
|
|
static PyObject *
|
|
wrap_richcmpfunc(PyObject *self, PyObject *args, void *wrapped, int op)
|
|
{
|
|
richcmpfunc func = (richcmpfunc)wrapped;
|
|
PyObject *other;
|
|
|
|
if (!PyArg_ParseTuple(args, "O", &other))
|
|
return NULL;
|
|
return (*func)(self, other, op);
|
|
}
|
|
|
|
#undef RICHCMP_WRAPPER
|
|
#define RICHCMP_WRAPPER(NAME, OP) \
|
|
static PyObject * \
|
|
richcmp_##NAME(PyObject *self, PyObject *args, void *wrapped) \
|
|
{ \
|
|
return wrap_richcmpfunc(self, args, wrapped, OP); \
|
|
}
|
|
|
|
RICHCMP_WRAPPER(lt, Py_LT)
|
|
RICHCMP_WRAPPER(le, Py_LE)
|
|
RICHCMP_WRAPPER(eq, Py_EQ)
|
|
RICHCMP_WRAPPER(ne, Py_NE)
|
|
RICHCMP_WRAPPER(gt, Py_GT)
|
|
RICHCMP_WRAPPER(ge, Py_GE)
|
|
|
|
static PyObject *
|
|
wrap_next(PyObject *self, PyObject *args, void *wrapped)
|
|
{
|
|
unaryfunc func = (unaryfunc)wrapped;
|
|
PyObject *res;
|
|
|
|
if (!PyArg_ParseTuple(args, ""))
|
|
return NULL;
|
|
res = (*func)(self);
|
|
if (res == NULL && !PyErr_Occurred())
|
|
PyErr_SetNone(PyExc_StopIteration);
|
|
return res;
|
|
}
|
|
|
|
static PyObject *
|
|
wrap_descr_get(PyObject *self, PyObject *args, void *wrapped)
|
|
{
|
|
descrgetfunc func = (descrgetfunc)wrapped;
|
|
PyObject *obj;
|
|
PyObject *type = NULL;
|
|
|
|
if (!PyArg_ParseTuple(args, "O|O", &obj, &type))
|
|
return NULL;
|
|
return (*func)(self, obj, type);
|
|
}
|
|
|
|
static PyObject *
|
|
wrap_descr_set(PyObject *self, PyObject *args, void *wrapped)
|
|
{
|
|
descrsetfunc func = (descrsetfunc)wrapped;
|
|
PyObject *obj, *value;
|
|
int ret;
|
|
|
|
if (!PyArg_ParseTuple(args, "OO", &obj, &value))
|
|
return NULL;
|
|
ret = (*func)(self, obj, value);
|
|
if (ret < 0)
|
|
return NULL;
|
|
Py_INCREF(Py_None);
|
|
return Py_None;
|
|
}
|
|
|
|
static PyObject *
|
|
wrap_descr_delete(PyObject *self, PyObject *args, void *wrapped)
|
|
{
|
|
descrsetfunc func = (descrsetfunc)wrapped;
|
|
PyObject *obj;
|
|
int ret;
|
|
|
|
if (!PyArg_ParseTuple(args, "O", &obj))
|
|
return NULL;
|
|
ret = (*func)(self, obj, NULL);
|
|
if (ret < 0)
|
|
return NULL;
|
|
Py_INCREF(Py_None);
|
|
return Py_None;
|
|
}
|
|
|
|
static PyObject *
|
|
wrap_init(PyObject *self, PyObject *args, void *wrapped, PyObject *kwds)
|
|
{
|
|
initproc func = (initproc)wrapped;
|
|
|
|
if (func(self, args, kwds) < 0)
|
|
return NULL;
|
|
Py_INCREF(Py_None);
|
|
return Py_None;
|
|
}
|
|
|
|
static PyObject *
|
|
tp_new_wrapper(PyObject *self, PyObject *args, PyObject *kwds)
|
|
{
|
|
PyTypeObject *type, *subtype, *staticbase;
|
|
PyObject *arg0, *res;
|
|
|
|
if (self == NULL || !PyType_Check(self))
|
|
Py_FatalError("__new__() called with non-type 'self'");
|
|
type = (PyTypeObject *)self;
|
|
if (!PyTuple_Check(args) || PyTuple_GET_SIZE(args) < 1) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"%s.__new__(): not enough arguments",
|
|
type->tp_name);
|
|
return NULL;
|
|
}
|
|
arg0 = PyTuple_GET_ITEM(args, 0);
|
|
if (!PyType_Check(arg0)) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"%s.__new__(X): X is not a type object (%s)",
|
|
type->tp_name,
|
|
arg0->ob_type->tp_name);
|
|
return NULL;
|
|
}
|
|
subtype = (PyTypeObject *)arg0;
|
|
if (!PyType_IsSubtype(subtype, type)) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"%s.__new__(%s): %s is not a subtype of %s",
|
|
type->tp_name,
|
|
subtype->tp_name,
|
|
subtype->tp_name,
|
|
type->tp_name);
|
|
return NULL;
|
|
}
|
|
|
|
/* Check that the use doesn't do something silly and unsafe like
|
|
object.__new__(dict). To do this, we check that the
|
|
most derived base that's not a heap type is this type. */
|
|
staticbase = subtype;
|
|
while (staticbase && (staticbase->tp_flags & Py_TPFLAGS_HEAPTYPE))
|
|
staticbase = staticbase->tp_base;
|
|
if (staticbase->tp_new != type->tp_new) {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"%s.__new__(%s) is not safe, use %s.__new__()",
|
|
type->tp_name,
|
|
subtype->tp_name,
|
|
staticbase == NULL ? "?" : staticbase->tp_name);
|
|
return NULL;
|
|
}
|
|
|
|
args = PyTuple_GetSlice(args, 1, PyTuple_GET_SIZE(args));
|
|
if (args == NULL)
|
|
return NULL;
|
|
res = type->tp_new(subtype, args, kwds);
|
|
Py_DECREF(args);
|
|
return res;
|
|
}
|
|
|
|
static struct PyMethodDef tp_new_methoddef[] = {
|
|
{"__new__", (PyCFunction)tp_new_wrapper, METH_KEYWORDS,
|
|
PyDoc_STR("T.__new__(S, ...) -> "
|
|
"a new object with type S, a subtype of T")},
|
|
{0}
|
|
};
|
|
|
|
static int
|
|
add_tp_new_wrapper(PyTypeObject *type)
|
|
{
|
|
PyObject *func;
|
|
|
|
if (PyDict_GetItemString(type->tp_dict, "__new__") != NULL)
|
|
return 0;
|
|
func = PyCFunction_New(tp_new_methoddef, (PyObject *)type);
|
|
if (func == NULL)
|
|
return -1;
|
|
return PyDict_SetItemString(type->tp_dict, "__new__", func);
|
|
}
|
|
|
|
/* Slot wrappers that call the corresponding __foo__ slot. See comments
|
|
below at override_slots() for more explanation. */
|
|
|
|
#define SLOT0(FUNCNAME, OPSTR) \
|
|
static PyObject * \
|
|
FUNCNAME(PyObject *self) \
|
|
{ \
|
|
static PyObject *cache_str; \
|
|
return call_method(self, OPSTR, &cache_str, "()"); \
|
|
}
|
|
|
|
#define SLOT1(FUNCNAME, OPSTR, ARG1TYPE, ARGCODES) \
|
|
static PyObject * \
|
|
FUNCNAME(PyObject *self, ARG1TYPE arg1) \
|
|
{ \
|
|
static PyObject *cache_str; \
|
|
return call_method(self, OPSTR, &cache_str, "(" ARGCODES ")", arg1); \
|
|
}
|
|
|
|
|
|
#define SLOT1BINFULL(FUNCNAME, TESTFUNC, SLOTNAME, OPSTR, ROPSTR) \
|
|
static PyObject * \
|
|
FUNCNAME(PyObject *self, PyObject *other) \
|
|
{ \
|
|
static PyObject *cache_str, *rcache_str; \
|
|
int do_other = self->ob_type != other->ob_type && \
|
|
other->ob_type->tp_as_number != NULL && \
|
|
other->ob_type->tp_as_number->SLOTNAME == TESTFUNC; \
|
|
if (self->ob_type->tp_as_number != NULL && \
|
|
self->ob_type->tp_as_number->SLOTNAME == TESTFUNC) { \
|
|
PyObject *r; \
|
|
if (do_other && \
|
|
PyType_IsSubtype(other->ob_type, self->ob_type)) { \
|
|
r = call_maybe( \
|
|
other, ROPSTR, &rcache_str, "(O)", self); \
|
|
if (r != Py_NotImplemented) \
|
|
return r; \
|
|
Py_DECREF(r); \
|
|
do_other = 0; \
|
|
} \
|
|
r = call_maybe( \
|
|
self, OPSTR, &cache_str, "(O)", other); \
|
|
if (r != Py_NotImplemented || \
|
|
other->ob_type == self->ob_type) \
|
|
return r; \
|
|
Py_DECREF(r); \
|
|
} \
|
|
if (do_other) { \
|
|
return call_maybe( \
|
|
other, ROPSTR, &rcache_str, "(O)", self); \
|
|
} \
|
|
Py_INCREF(Py_NotImplemented); \
|
|
return Py_NotImplemented; \
|
|
}
|
|
|
|
#define SLOT1BIN(FUNCNAME, SLOTNAME, OPSTR, ROPSTR) \
|
|
SLOT1BINFULL(FUNCNAME, FUNCNAME, SLOTNAME, OPSTR, ROPSTR)
|
|
|
|
#define SLOT2(FUNCNAME, OPSTR, ARG1TYPE, ARG2TYPE, ARGCODES) \
|
|
static PyObject * \
|
|
FUNCNAME(PyObject *self, ARG1TYPE arg1, ARG2TYPE arg2) \
|
|
{ \
|
|
static PyObject *cache_str; \
|
|
return call_method(self, OPSTR, &cache_str, \
|
|
"(" ARGCODES ")", arg1, arg2); \
|
|
}
|
|
|
|
static int
|
|
slot_sq_length(PyObject *self)
|
|
{
|
|
static PyObject *len_str;
|
|
PyObject *res = call_method(self, "__len__", &len_str, "()");
|
|
int len;
|
|
|
|
if (res == NULL)
|
|
return -1;
|
|
len = (int)PyInt_AsLong(res);
|
|
Py_DECREF(res);
|
|
if (len == -1 && PyErr_Occurred())
|
|
return -1;
|
|
if (len < 0) {
|
|
PyErr_SetString(PyExc_ValueError,
|
|
"__len__() should return >= 0");
|
|
return -1;
|
|
}
|
|
return len;
|
|
}
|
|
|
|
SLOT1(slot_sq_concat, "__add__", PyObject *, "O")
|
|
SLOT1(slot_sq_repeat, "__mul__", int, "i")
|
|
|
|
/* Super-optimized version of slot_sq_item.
|
|
Other slots could do the same... */
|
|
static PyObject *
|
|
slot_sq_item(PyObject *self, int i)
|
|
{
|
|
static PyObject *getitem_str;
|
|
PyObject *func, *args = NULL, *ival = NULL, *retval = NULL;
|
|
descrgetfunc f;
|
|
|
|
if (getitem_str == NULL) {
|
|
getitem_str = PyString_InternFromString("__getitem__");
|
|
if (getitem_str == NULL)
|
|
return NULL;
|
|
}
|
|
func = _PyType_Lookup(self->ob_type, getitem_str);
|
|
if (func != NULL) {
|
|
if ((f = func->ob_type->tp_descr_get) == NULL)
|
|
Py_INCREF(func);
|
|
else {
|
|
func = f(func, self, (PyObject *)(self->ob_type));
|
|
if (func == NULL) {
|
|
return NULL;
|
|
}
|
|
}
|
|
ival = PyInt_FromLong(i);
|
|
if (ival != NULL) {
|
|
args = PyTuple_New(1);
|
|
if (args != NULL) {
|
|
PyTuple_SET_ITEM(args, 0, ival);
|
|
retval = PyObject_Call(func, args, NULL);
|
|
Py_XDECREF(args);
|
|
Py_XDECREF(func);
|
|
return retval;
|
|
}
|
|
}
|
|
}
|
|
else {
|
|
PyErr_SetObject(PyExc_AttributeError, getitem_str);
|
|
}
|
|
Py_XDECREF(args);
|
|
Py_XDECREF(ival);
|
|
Py_XDECREF(func);
|
|
return NULL;
|
|
}
|
|
|
|
SLOT2(slot_sq_slice, "__getslice__", int, int, "ii")
|
|
|
|
static int
|
|
slot_sq_ass_item(PyObject *self, int index, PyObject *value)
|
|
{
|
|
PyObject *res;
|
|
static PyObject *delitem_str, *setitem_str;
|
|
|
|
if (value == NULL)
|
|
res = call_method(self, "__delitem__", &delitem_str,
|
|
"(i)", index);
|
|
else
|
|
res = call_method(self, "__setitem__", &setitem_str,
|
|
"(iO)", index, value);
|
|
if (res == NULL)
|
|
return -1;
|
|
Py_DECREF(res);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
slot_sq_ass_slice(PyObject *self, int i, int j, PyObject *value)
|
|
{
|
|
PyObject *res;
|
|
static PyObject *delslice_str, *setslice_str;
|
|
|
|
if (value == NULL)
|
|
res = call_method(self, "__delslice__", &delslice_str,
|
|
"(ii)", i, j);
|
|
else
|
|
res = call_method(self, "__setslice__", &setslice_str,
|
|
"(iiO)", i, j, value);
|
|
if (res == NULL)
|
|
return -1;
|
|
Py_DECREF(res);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
slot_sq_contains(PyObject *self, PyObject *value)
|
|
{
|
|
PyObject *func, *res, *args;
|
|
static PyObject *contains_str;
|
|
|
|
func = lookup_maybe(self, "__contains__", &contains_str);
|
|
|
|
if (func != NULL) {
|
|
args = Py_BuildValue("(O)", value);
|
|
if (args == NULL)
|
|
res = NULL;
|
|
else {
|
|
res = PyObject_Call(func, args, NULL);
|
|
Py_DECREF(args);
|
|
}
|
|
Py_DECREF(func);
|
|
if (res == NULL)
|
|
return -1;
|
|
return PyObject_IsTrue(res);
|
|
}
|
|
else if (PyErr_Occurred())
|
|
return -1;
|
|
else {
|
|
return _PySequence_IterSearch(self, value,
|
|
PY_ITERSEARCH_CONTAINS);
|
|
}
|
|
}
|
|
|
|
SLOT1(slot_sq_inplace_concat, "__iadd__", PyObject *, "O")
|
|
SLOT1(slot_sq_inplace_repeat, "__imul__", int, "i")
|
|
|
|
#define slot_mp_length slot_sq_length
|
|
|
|
SLOT1(slot_mp_subscript, "__getitem__", PyObject *, "O")
|
|
|
|
static int
|
|
slot_mp_ass_subscript(PyObject *self, PyObject *key, PyObject *value)
|
|
{
|
|
PyObject *res;
|
|
static PyObject *delitem_str, *setitem_str;
|
|
|
|
if (value == NULL)
|
|
res = call_method(self, "__delitem__", &delitem_str,
|
|
"(O)", key);
|
|
else
|
|
res = call_method(self, "__setitem__", &setitem_str,
|
|
"(OO)", key, value);
|
|
if (res == NULL)
|
|
return -1;
|
|
Py_DECREF(res);
|
|
return 0;
|
|
}
|
|
|
|
SLOT1BIN(slot_nb_add, nb_add, "__add__", "__radd__")
|
|
SLOT1BIN(slot_nb_subtract, nb_subtract, "__sub__", "__rsub__")
|
|
SLOT1BIN(slot_nb_multiply, nb_multiply, "__mul__", "__rmul__")
|
|
SLOT1BIN(slot_nb_divide, nb_divide, "__div__", "__rdiv__")
|
|
SLOT1BIN(slot_nb_remainder, nb_remainder, "__mod__", "__rmod__")
|
|
SLOT1BIN(slot_nb_divmod, nb_divmod, "__divmod__", "__rdivmod__")
|
|
|
|
static PyObject *slot_nb_power(PyObject *, PyObject *, PyObject *);
|
|
|
|
SLOT1BINFULL(slot_nb_power_binary, slot_nb_power,
|
|
nb_power, "__pow__", "__rpow__")
|
|
|
|
static PyObject *
|
|
slot_nb_power(PyObject *self, PyObject *other, PyObject *modulus)
|
|
{
|
|
static PyObject *pow_str;
|
|
|
|
if (modulus == Py_None)
|
|
return slot_nb_power_binary(self, other);
|
|
/* Three-arg power doesn't use __rpow__. But ternary_op
|
|
can call this when the second argument's type uses
|
|
slot_nb_power, so check before calling self.__pow__. */
|
|
if (self->ob_type->tp_as_number != NULL &&
|
|
self->ob_type->tp_as_number->nb_power == slot_nb_power) {
|
|
return call_method(self, "__pow__", &pow_str,
|
|
"(OO)", other, modulus);
|
|
}
|
|
Py_INCREF(Py_NotImplemented);
|
|
return Py_NotImplemented;
|
|
}
|
|
|
|
SLOT0(slot_nb_negative, "__neg__")
|
|
SLOT0(slot_nb_positive, "__pos__")
|
|
SLOT0(slot_nb_absolute, "__abs__")
|
|
|
|
static int
|
|
slot_nb_nonzero(PyObject *self)
|
|
{
|
|
PyObject *func, *res, *args;
|
|
static PyObject *nonzero_str, *len_str;
|
|
|
|
func = lookup_maybe(self, "__nonzero__", &nonzero_str);
|
|
if (func == NULL) {
|
|
if (PyErr_Occurred())
|
|
return -1;
|
|
func = lookup_maybe(self, "__len__", &len_str);
|
|
if (func == NULL) {
|
|
if (PyErr_Occurred())
|
|
return -1;
|
|
else
|
|
return 1;
|
|
}
|
|
}
|
|
args = res = PyTuple_New(0);
|
|
if (args != NULL) {
|
|
res = PyObject_Call(func, args, NULL);
|
|
Py_DECREF(args);
|
|
}
|
|
Py_DECREF(func);
|
|
if (res == NULL)
|
|
return -1;
|
|
return PyObject_IsTrue(res);
|
|
}
|
|
|
|
SLOT0(slot_nb_invert, "__invert__")
|
|
SLOT1BIN(slot_nb_lshift, nb_lshift, "__lshift__", "__rlshift__")
|
|
SLOT1BIN(slot_nb_rshift, nb_rshift, "__rshift__", "__rrshift__")
|
|
SLOT1BIN(slot_nb_and, nb_and, "__and__", "__rand__")
|
|
SLOT1BIN(slot_nb_xor, nb_xor, "__xor__", "__rxor__")
|
|
SLOT1BIN(slot_nb_or, nb_or, "__or__", "__ror__")
|
|
|
|
static int
|
|
slot_nb_coerce(PyObject **a, PyObject **b)
|
|
{
|
|
static PyObject *coerce_str;
|
|
PyObject *self = *a, *other = *b;
|
|
|
|
if (self->ob_type->tp_as_number != NULL &&
|
|
self->ob_type->tp_as_number->nb_coerce == slot_nb_coerce) {
|
|
PyObject *r;
|
|
r = call_maybe(
|
|
self, "__coerce__", &coerce_str, "(O)", other);
|
|
if (r == NULL)
|
|
return -1;
|
|
if (r == Py_NotImplemented) {
|
|
Py_DECREF(r);
|
|
}
|
|
else {
|
|
if (!PyTuple_Check(r) || PyTuple_GET_SIZE(r) != 2) {
|
|
PyErr_SetString(PyExc_TypeError,
|
|
"__coerce__ didn't return a 2-tuple");
|
|
Py_DECREF(r);
|
|
return -1;
|
|
}
|
|
*a = PyTuple_GET_ITEM(r, 0);
|
|
Py_INCREF(*a);
|
|
*b = PyTuple_GET_ITEM(r, 1);
|
|
Py_INCREF(*b);
|
|
Py_DECREF(r);
|
|
return 0;
|
|
}
|
|
}
|
|
if (other->ob_type->tp_as_number != NULL &&
|
|
other->ob_type->tp_as_number->nb_coerce == slot_nb_coerce) {
|
|
PyObject *r;
|
|
r = call_maybe(
|
|
other, "__coerce__", &coerce_str, "(O)", self);
|
|
if (r == NULL)
|
|
return -1;
|
|
if (r == Py_NotImplemented) {
|
|
Py_DECREF(r);
|
|
return 1;
|
|
}
|
|
if (!PyTuple_Check(r) || PyTuple_GET_SIZE(r) != 2) {
|
|
PyErr_SetString(PyExc_TypeError,
|
|
"__coerce__ didn't return a 2-tuple");
|
|
Py_DECREF(r);
|
|
return -1;
|
|
}
|
|
*a = PyTuple_GET_ITEM(r, 1);
|
|
Py_INCREF(*a);
|
|
*b = PyTuple_GET_ITEM(r, 0);
|
|
Py_INCREF(*b);
|
|
Py_DECREF(r);
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
SLOT0(slot_nb_int, "__int__")
|
|
SLOT0(slot_nb_long, "__long__")
|
|
SLOT0(slot_nb_float, "__float__")
|
|
SLOT0(slot_nb_oct, "__oct__")
|
|
SLOT0(slot_nb_hex, "__hex__")
|
|
SLOT1(slot_nb_inplace_add, "__iadd__", PyObject *, "O")
|
|
SLOT1(slot_nb_inplace_subtract, "__isub__", PyObject *, "O")
|
|
SLOT1(slot_nb_inplace_multiply, "__imul__", PyObject *, "O")
|
|
SLOT1(slot_nb_inplace_divide, "__idiv__", PyObject *, "O")
|
|
SLOT1(slot_nb_inplace_remainder, "__imod__", PyObject *, "O")
|
|
SLOT1(slot_nb_inplace_power, "__ipow__", PyObject *, "O")
|
|
SLOT1(slot_nb_inplace_lshift, "__ilshift__", PyObject *, "O")
|
|
SLOT1(slot_nb_inplace_rshift, "__irshift__", PyObject *, "O")
|
|
SLOT1(slot_nb_inplace_and, "__iand__", PyObject *, "O")
|
|
SLOT1(slot_nb_inplace_xor, "__ixor__", PyObject *, "O")
|
|
SLOT1(slot_nb_inplace_or, "__ior__", PyObject *, "O")
|
|
SLOT1BIN(slot_nb_floor_divide, nb_floor_divide,
|
|
"__floordiv__", "__rfloordiv__")
|
|
SLOT1BIN(slot_nb_true_divide, nb_true_divide, "__truediv__", "__rtruediv__")
|
|
SLOT1(slot_nb_inplace_floor_divide, "__ifloordiv__", PyObject *, "O")
|
|
SLOT1(slot_nb_inplace_true_divide, "__itruediv__", PyObject *, "O")
|
|
|
|
static int
|
|
half_compare(PyObject *self, PyObject *other)
|
|
{
|
|
PyObject *func, *args, *res;
|
|
static PyObject *cmp_str;
|
|
int c;
|
|
|
|
func = lookup_method(self, "__cmp__", &cmp_str);
|
|
if (func == NULL) {
|
|
PyErr_Clear();
|
|
}
|
|
else {
|
|
args = Py_BuildValue("(O)", other);
|
|
if (args == NULL)
|
|
res = NULL;
|
|
else {
|
|
res = PyObject_Call(func, args, NULL);
|
|
Py_DECREF(args);
|
|
}
|
|
Py_DECREF(func);
|
|
if (res != Py_NotImplemented) {
|
|
if (res == NULL)
|
|
return -2;
|
|
c = PyInt_AsLong(res);
|
|
Py_DECREF(res);
|
|
if (c == -1 && PyErr_Occurred())
|
|
return -2;
|
|
return (c < 0) ? -1 : (c > 0) ? 1 : 0;
|
|
}
|
|
Py_DECREF(res);
|
|
}
|
|
return 2;
|
|
}
|
|
|
|
/* This slot is published for the benefit of try_3way_compare in object.c */
|
|
int
|
|
_PyObject_SlotCompare(PyObject *self, PyObject *other)
|
|
{
|
|
int c;
|
|
|
|
if (self->ob_type->tp_compare == _PyObject_SlotCompare) {
|
|
c = half_compare(self, other);
|
|
if (c <= 1)
|
|
return c;
|
|
}
|
|
if (other->ob_type->tp_compare == _PyObject_SlotCompare) {
|
|
c = half_compare(other, self);
|
|
if (c < -1)
|
|
return -2;
|
|
if (c <= 1)
|
|
return -c;
|
|
}
|
|
return (void *)self < (void *)other ? -1 :
|
|
(void *)self > (void *)other ? 1 : 0;
|
|
}
|
|
|
|
static PyObject *
|
|
slot_tp_repr(PyObject *self)
|
|
{
|
|
PyObject *func, *res;
|
|
static PyObject *repr_str;
|
|
|
|
func = lookup_method(self, "__repr__", &repr_str);
|
|
if (func != NULL) {
|
|
res = PyEval_CallObject(func, NULL);
|
|
Py_DECREF(func);
|
|
return res;
|
|
}
|
|
PyErr_Clear();
|
|
return PyString_FromFormat("<%s object at %p>",
|
|
self->ob_type->tp_name, self);
|
|
}
|
|
|
|
static PyObject *
|
|
slot_tp_str(PyObject *self)
|
|
{
|
|
PyObject *func, *res;
|
|
static PyObject *str_str;
|
|
|
|
func = lookup_method(self, "__str__", &str_str);
|
|
if (func != NULL) {
|
|
res = PyEval_CallObject(func, NULL);
|
|
Py_DECREF(func);
|
|
return res;
|
|
}
|
|
else {
|
|
PyErr_Clear();
|
|
return slot_tp_repr(self);
|
|
}
|
|
}
|
|
|
|
static long
|
|
slot_tp_hash(PyObject *self)
|
|
{
|
|
PyObject *func, *res;
|
|
static PyObject *hash_str, *eq_str, *cmp_str;
|
|
|
|
long h;
|
|
|
|
func = lookup_method(self, "__hash__", &hash_str);
|
|
|
|
if (func != NULL) {
|
|
res = PyEval_CallObject(func, NULL);
|
|
Py_DECREF(func);
|
|
if (res == NULL)
|
|
return -1;
|
|
h = PyInt_AsLong(res);
|
|
}
|
|
else {
|
|
PyErr_Clear();
|
|
func = lookup_method(self, "__eq__", &eq_str);
|
|
if (func == NULL) {
|
|
PyErr_Clear();
|
|
func = lookup_method(self, "__cmp__", &cmp_str);
|
|
}
|
|
if (func != NULL) {
|
|
Py_DECREF(func);
|
|
PyErr_SetString(PyExc_TypeError, "unhashable type");
|
|
return -1;
|
|
}
|
|
PyErr_Clear();
|
|
h = _Py_HashPointer((void *)self);
|
|
}
|
|
if (h == -1 && !PyErr_Occurred())
|
|
h = -2;
|
|
return h;
|
|
}
|
|
|
|
static PyObject *
|
|
slot_tp_call(PyObject *self, PyObject *args, PyObject *kwds)
|
|
{
|
|
static PyObject *call_str;
|
|
PyObject *meth = lookup_method(self, "__call__", &call_str);
|
|
PyObject *res;
|
|
|
|
if (meth == NULL)
|
|
return NULL;
|
|
res = PyObject_Call(meth, args, kwds);
|
|
Py_DECREF(meth);
|
|
return res;
|
|
}
|
|
|
|
/* There are two slot dispatch functions for tp_getattro.
|
|
|
|
- slot_tp_getattro() is used when __getattribute__ is overridden
|
|
but no __getattr__ hook is present;
|
|
|
|
- slot_tp_getattr_hook() is used when a __getattr__ hook is present.
|
|
|
|
The code in update_one_slot() always installs slot_tp_getattr_hook(); this
|
|
detects the absence of __getattr__ and then installs the simpler slot if
|
|
necessary. */
|
|
|
|
static PyObject *
|
|
slot_tp_getattro(PyObject *self, PyObject *name)
|
|
{
|
|
static PyObject *getattribute_str = NULL;
|
|
return call_method(self, "__getattribute__", &getattribute_str,
|
|
"(O)", name);
|
|
}
|
|
|
|
static PyObject *
|
|
slot_tp_getattr_hook(PyObject *self, PyObject *name)
|
|
{
|
|
PyTypeObject *tp = self->ob_type;
|
|
PyObject *getattr, *getattribute, *res;
|
|
static PyObject *getattribute_str = NULL;
|
|
static PyObject *getattr_str = NULL;
|
|
|
|
if (getattr_str == NULL) {
|
|
getattr_str = PyString_InternFromString("__getattr__");
|
|
if (getattr_str == NULL)
|
|
return NULL;
|
|
}
|
|
if (getattribute_str == NULL) {
|
|
getattribute_str =
|
|
PyString_InternFromString("__getattribute__");
|
|
if (getattribute_str == NULL)
|
|
return NULL;
|
|
}
|
|
getattr = _PyType_Lookup(tp, getattr_str);
|
|
if (getattr == NULL) {
|
|
/* No __getattr__ hook: use a simpler dispatcher */
|
|
tp->tp_getattro = slot_tp_getattro;
|
|
return slot_tp_getattro(self, name);
|
|
}
|
|
getattribute = _PyType_Lookup(tp, getattribute_str);
|
|
if (getattribute == NULL ||
|
|
(getattribute->ob_type == &PyWrapperDescr_Type &&
|
|
((PyWrapperDescrObject *)getattribute)->d_wrapped ==
|
|
(void *)PyObject_GenericGetAttr))
|
|
res = PyObject_GenericGetAttr(self, name);
|
|
else
|
|
res = PyObject_CallFunction(getattribute, "OO", self, name);
|
|
if (res == NULL && PyErr_ExceptionMatches(PyExc_AttributeError)) {
|
|
PyErr_Clear();
|
|
res = PyObject_CallFunction(getattr, "OO", self, name);
|
|
}
|
|
return res;
|
|
}
|
|
|
|
static int
|
|
slot_tp_setattro(PyObject *self, PyObject *name, PyObject *value)
|
|
{
|
|
PyObject *res;
|
|
static PyObject *delattr_str, *setattr_str;
|
|
|
|
if (value == NULL)
|
|
res = call_method(self, "__delattr__", &delattr_str,
|
|
"(O)", name);
|
|
else
|
|
res = call_method(self, "__setattr__", &setattr_str,
|
|
"(OO)", name, value);
|
|
if (res == NULL)
|
|
return -1;
|
|
Py_DECREF(res);
|
|
return 0;
|
|
}
|
|
|
|
/* Map rich comparison operators to their __xx__ namesakes */
|
|
static char *name_op[] = {
|
|
"__lt__",
|
|
"__le__",
|
|
"__eq__",
|
|
"__ne__",
|
|
"__gt__",
|
|
"__ge__",
|
|
};
|
|
|
|
static PyObject *
|
|
half_richcompare(PyObject *self, PyObject *other, int op)
|
|
{
|
|
PyObject *func, *args, *res;
|
|
static PyObject *op_str[6];
|
|
|
|
func = lookup_method(self, name_op[op], &op_str[op]);
|
|
if (func == NULL) {
|
|
PyErr_Clear();
|
|
Py_INCREF(Py_NotImplemented);
|
|
return Py_NotImplemented;
|
|
}
|
|
args = Py_BuildValue("(O)", other);
|
|
if (args == NULL)
|
|
res = NULL;
|
|
else {
|
|
res = PyObject_Call(func, args, NULL);
|
|
Py_DECREF(args);
|
|
}
|
|
Py_DECREF(func);
|
|
return res;
|
|
}
|
|
|
|
/* Map rich comparison operators to their swapped version, e.g. LT --> GT */
|
|
static int swapped_op[] = {Py_GT, Py_GE, Py_EQ, Py_NE, Py_LT, Py_LE};
|
|
|
|
static PyObject *
|
|
slot_tp_richcompare(PyObject *self, PyObject *other, int op)
|
|
{
|
|
PyObject *res;
|
|
|
|
if (self->ob_type->tp_richcompare == slot_tp_richcompare) {
|
|
res = half_richcompare(self, other, op);
|
|
if (res != Py_NotImplemented)
|
|
return res;
|
|
Py_DECREF(res);
|
|
}
|
|
if (other->ob_type->tp_richcompare == slot_tp_richcompare) {
|
|
res = half_richcompare(other, self, swapped_op[op]);
|
|
if (res != Py_NotImplemented) {
|
|
return res;
|
|
}
|
|
Py_DECREF(res);
|
|
}
|
|
Py_INCREF(Py_NotImplemented);
|
|
return Py_NotImplemented;
|
|
}
|
|
|
|
static PyObject *
|
|
slot_tp_iter(PyObject *self)
|
|
{
|
|
PyObject *func, *res;
|
|
static PyObject *iter_str, *getitem_str;
|
|
|
|
func = lookup_method(self, "__iter__", &iter_str);
|
|
if (func != NULL) {
|
|
PyObject *args;
|
|
args = res = PyTuple_New(0);
|
|
if (args != NULL) {
|
|
res = PyObject_Call(func, args, NULL);
|
|
Py_DECREF(args);
|
|
}
|
|
Py_DECREF(func);
|
|
return res;
|
|
}
|
|
PyErr_Clear();
|
|
func = lookup_method(self, "__getitem__", &getitem_str);
|
|
if (func == NULL) {
|
|
PyErr_SetString(PyExc_TypeError,
|
|
"iteration over non-sequence");
|
|
return NULL;
|
|
}
|
|
Py_DECREF(func);
|
|
return PySeqIter_New(self);
|
|
}
|
|
|
|
static PyObject *
|
|
slot_tp_iternext(PyObject *self)
|
|
{
|
|
static PyObject *next_str;
|
|
return call_method(self, "next", &next_str, "()");
|
|
}
|
|
|
|
static PyObject *
|
|
slot_tp_descr_get(PyObject *self, PyObject *obj, PyObject *type)
|
|
{
|
|
PyTypeObject *tp = self->ob_type;
|
|
PyObject *get;
|
|
static PyObject *get_str = NULL;
|
|
|
|
if (get_str == NULL) {
|
|
get_str = PyString_InternFromString("__get__");
|
|
if (get_str == NULL)
|
|
return NULL;
|
|
}
|
|
get = _PyType_Lookup(tp, get_str);
|
|
if (get == NULL) {
|
|
/* Avoid further slowdowns */
|
|
if (tp->tp_descr_get == slot_tp_descr_get)
|
|
tp->tp_descr_get = NULL;
|
|
Py_INCREF(self);
|
|
return self;
|
|
}
|
|
if (obj == NULL)
|
|
obj = Py_None;
|
|
if (type == NULL)
|
|
type = Py_None;
|
|
return PyObject_CallFunction(get, "OOO", self, obj, type);
|
|
}
|
|
|
|
static int
|
|
slot_tp_descr_set(PyObject *self, PyObject *target, PyObject *value)
|
|
{
|
|
PyObject *res;
|
|
static PyObject *del_str, *set_str;
|
|
|
|
if (value == NULL)
|
|
res = call_method(self, "__delete__", &del_str,
|
|
"(O)", target);
|
|
else
|
|
res = call_method(self, "__set__", &set_str,
|
|
"(OO)", target, value);
|
|
if (res == NULL)
|
|
return -1;
|
|
Py_DECREF(res);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
slot_tp_init(PyObject *self, PyObject *args, PyObject *kwds)
|
|
{
|
|
static PyObject *init_str;
|
|
PyObject *meth = lookup_method(self, "__init__", &init_str);
|
|
PyObject *res;
|
|
|
|
if (meth == NULL)
|
|
return -1;
|
|
res = PyObject_Call(meth, args, kwds);
|
|
Py_DECREF(meth);
|
|
if (res == NULL)
|
|
return -1;
|
|
Py_DECREF(res);
|
|
return 0;
|
|
}
|
|
|
|
static PyObject *
|
|
slot_tp_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
|
|
{
|
|
static PyObject *new_str;
|
|
PyObject *func;
|
|
PyObject *newargs, *x;
|
|
int i, n;
|
|
|
|
if (new_str == NULL) {
|
|
new_str = PyString_InternFromString("__new__");
|
|
if (new_str == NULL)
|
|
return NULL;
|
|
}
|
|
func = PyObject_GetAttr((PyObject *)type, new_str);
|
|
if (func == NULL)
|
|
return NULL;
|
|
assert(PyTuple_Check(args));
|
|
n = PyTuple_GET_SIZE(args);
|
|
newargs = PyTuple_New(n+1);
|
|
if (newargs == NULL)
|
|
return NULL;
|
|
Py_INCREF(type);
|
|
PyTuple_SET_ITEM(newargs, 0, (PyObject *)type);
|
|
for (i = 0; i < n; i++) {
|
|
x = PyTuple_GET_ITEM(args, i);
|
|
Py_INCREF(x);
|
|
PyTuple_SET_ITEM(newargs, i+1, x);
|
|
}
|
|
x = PyObject_Call(func, newargs, kwds);
|
|
Py_DECREF(newargs);
|
|
Py_DECREF(func);
|
|
return x;
|
|
}
|
|
|
|
static void
|
|
slot_tp_del(PyObject *self)
|
|
{
|
|
static PyObject *del_str = NULL;
|
|
PyObject *del, *res;
|
|
PyObject *error_type, *error_value, *error_traceback;
|
|
|
|
/* Temporarily resurrect the object. */
|
|
assert(self->ob_refcnt == 0);
|
|
self->ob_refcnt = 1;
|
|
|
|
/* Save the current exception, if any. */
|
|
PyErr_Fetch(&error_type, &error_value, &error_traceback);
|
|
|
|
/* Execute __del__ method, if any. */
|
|
del = lookup_maybe(self, "__del__", &del_str);
|
|
if (del != NULL) {
|
|
res = PyEval_CallObject(del, NULL);
|
|
if (res == NULL)
|
|
PyErr_WriteUnraisable(del);
|
|
else
|
|
Py_DECREF(res);
|
|
Py_DECREF(del);
|
|
}
|
|
|
|
/* Restore the saved exception. */
|
|
PyErr_Restore(error_type, error_value, error_traceback);
|
|
|
|
/* Undo the temporary resurrection; can't use DECREF here, it would
|
|
* cause a recursive call.
|
|
*/
|
|
assert(self->ob_refcnt > 0);
|
|
if (--self->ob_refcnt == 0)
|
|
return; /* this is the normal path out */
|
|
|
|
/* __del__ resurrected it! Make it look like the original Py_DECREF
|
|
* never happened.
|
|
*/
|
|
{
|
|
int refcnt = self->ob_refcnt;
|
|
_Py_NewReference(self);
|
|
self->ob_refcnt = refcnt;
|
|
}
|
|
assert(!PyType_IS_GC(self->ob_type) ||
|
|
_Py_AS_GC(self)->gc.gc_refs != _PyGC_REFS_UNTRACKED);
|
|
/* If Py_REF_DEBUG, the original decref dropped _Py_RefTotal, but
|
|
* _Py_NewReference bumped it again, so that's a wash.
|
|
* If Py_TRACE_REFS, _Py_NewReference re-added self to the object
|
|
* chain, so no more to do there either.
|
|
* If COUNT_ALLOCS, the original decref bumped tp_frees, and
|
|
* _Py_NewReference bumped tp_allocs: both of those need to be
|
|
* undone.
|
|
*/
|
|
#ifdef COUNT_ALLOCS
|
|
--self->ob_type->tp_frees;
|
|
--self->ob_type->tp_allocs;
|
|
#endif
|
|
}
|
|
|
|
|
|
/* Table mapping __foo__ names to tp_foo offsets and slot_tp_foo wrapper
|
|
functions. The offsets here are relative to the 'etype' structure, which
|
|
incorporates the additional structures used for numbers, sequences and
|
|
mappings. Note that multiple names may map to the same slot (e.g. __eq__,
|
|
__ne__ etc. all map to tp_richcompare) and one name may map to multiple
|
|
slots (e.g. __str__ affects tp_str as well as tp_repr). The table is
|
|
terminated with an all-zero entry. (This table is further initialized and
|
|
sorted in init_slotdefs() below.) */
|
|
|
|
typedef struct wrapperbase slotdef;
|
|
|
|
#undef TPSLOT
|
|
#undef FLSLOT
|
|
#undef ETSLOT
|
|
#undef SQSLOT
|
|
#undef MPSLOT
|
|
#undef NBSLOT
|
|
#undef UNSLOT
|
|
#undef IBSLOT
|
|
#undef BINSLOT
|
|
#undef RBINSLOT
|
|
|
|
#define TPSLOT(NAME, SLOT, FUNCTION, WRAPPER, DOC) \
|
|
{NAME, offsetof(PyTypeObject, SLOT), (void *)(FUNCTION), WRAPPER, \
|
|
PyDoc_STR(DOC)}
|
|
#define FLSLOT(NAME, SLOT, FUNCTION, WRAPPER, DOC, FLAGS) \
|
|
{NAME, offsetof(PyTypeObject, SLOT), (void *)(FUNCTION), WRAPPER, \
|
|
PyDoc_STR(DOC), FLAGS}
|
|
#define ETSLOT(NAME, SLOT, FUNCTION, WRAPPER, DOC) \
|
|
{NAME, offsetof(etype, SLOT), (void *)(FUNCTION), WRAPPER, \
|
|
PyDoc_STR(DOC)}
|
|
#define SQSLOT(NAME, SLOT, FUNCTION, WRAPPER, DOC) \
|
|
ETSLOT(NAME, as_sequence.SLOT, FUNCTION, WRAPPER, DOC)
|
|
#define MPSLOT(NAME, SLOT, FUNCTION, WRAPPER, DOC) \
|
|
ETSLOT(NAME, as_mapping.SLOT, FUNCTION, WRAPPER, DOC)
|
|
#define NBSLOT(NAME, SLOT, FUNCTION, WRAPPER, DOC) \
|
|
ETSLOT(NAME, as_number.SLOT, FUNCTION, WRAPPER, DOC)
|
|
#define UNSLOT(NAME, SLOT, FUNCTION, WRAPPER, DOC) \
|
|
ETSLOT(NAME, as_number.SLOT, FUNCTION, WRAPPER, \
|
|
"x." NAME "() <==> " DOC)
|
|
#define IBSLOT(NAME, SLOT, FUNCTION, WRAPPER, DOC) \
|
|
ETSLOT(NAME, as_number.SLOT, FUNCTION, WRAPPER, \
|
|
"x." NAME "(y) <==> x" DOC "y")
|
|
#define BINSLOT(NAME, SLOT, FUNCTION, DOC) \
|
|
ETSLOT(NAME, as_number.SLOT, FUNCTION, wrap_binaryfunc_l, \
|
|
"x." NAME "(y) <==> x" DOC "y")
|
|
#define RBINSLOT(NAME, SLOT, FUNCTION, DOC) \
|
|
ETSLOT(NAME, as_number.SLOT, FUNCTION, wrap_binaryfunc_r, \
|
|
"x." NAME "(y) <==> y" DOC "x")
|
|
|
|
static slotdef slotdefs[] = {
|
|
SQSLOT("__len__", sq_length, slot_sq_length, wrap_inquiry,
|
|
"x.__len__() <==> len(x)"),
|
|
SQSLOT("__add__", sq_concat, slot_sq_concat, wrap_binaryfunc,
|
|
"x.__add__(y) <==> x+y"),
|
|
SQSLOT("__mul__", sq_repeat, slot_sq_repeat, wrap_intargfunc,
|
|
"x.__mul__(n) <==> x*n"),
|
|
SQSLOT("__rmul__", sq_repeat, slot_sq_repeat, wrap_intargfunc,
|
|
"x.__rmul__(n) <==> n*x"),
|
|
SQSLOT("__getitem__", sq_item, slot_sq_item, wrap_sq_item,
|
|
"x.__getitem__(y) <==> x[y]"),
|
|
SQSLOT("__getslice__", sq_slice, slot_sq_slice, wrap_intintargfunc,
|
|
"x.__getslice__(i, j) <==> x[i:j]"),
|
|
SQSLOT("__setitem__", sq_ass_item, slot_sq_ass_item, wrap_sq_setitem,
|
|
"x.__setitem__(i, y) <==> x[i]=y"),
|
|
SQSLOT("__delitem__", sq_ass_item, slot_sq_ass_item, wrap_sq_delitem,
|
|
"x.__delitem__(y) <==> del x[y]"),
|
|
SQSLOT("__setslice__", sq_ass_slice, slot_sq_ass_slice,
|
|
wrap_intintobjargproc,
|
|
"x.__setslice__(i, j, y) <==> x[i:j]=y"),
|
|
SQSLOT("__delslice__", sq_ass_slice, slot_sq_ass_slice, wrap_delslice,
|
|
"x.__delslice__(i, j) <==> del x[i:j]"),
|
|
SQSLOT("__contains__", sq_contains, slot_sq_contains, wrap_objobjproc,
|
|
"x.__contains__(y) <==> y in x"),
|
|
SQSLOT("__iadd__", sq_inplace_concat, slot_sq_inplace_concat,
|
|
wrap_binaryfunc, "x.__iadd__(y) <==> x+=y"),
|
|
SQSLOT("__imul__", sq_inplace_repeat, slot_sq_inplace_repeat,
|
|
wrap_intargfunc, "x.__imul__(y) <==> x*=y"),
|
|
|
|
MPSLOT("__len__", mp_length, slot_mp_length, wrap_inquiry,
|
|
"x.__len__() <==> len(x)"),
|
|
MPSLOT("__getitem__", mp_subscript, slot_mp_subscript,
|
|
wrap_binaryfunc,
|
|
"x.__getitem__(y) <==> x[y]"),
|
|
MPSLOT("__setitem__", mp_ass_subscript, slot_mp_ass_subscript,
|
|
wrap_objobjargproc,
|
|
"x.__setitem__(i, y) <==> x[i]=y"),
|
|
MPSLOT("__delitem__", mp_ass_subscript, slot_mp_ass_subscript,
|
|
wrap_delitem,
|
|
"x.__delitem__(y) <==> del x[y]"),
|
|
|
|
BINSLOT("__add__", nb_add, slot_nb_add,
|
|
"+"),
|
|
RBINSLOT("__radd__", nb_add, slot_nb_add,
|
|
"+"),
|
|
BINSLOT("__sub__", nb_subtract, slot_nb_subtract,
|
|
"-"),
|
|
RBINSLOT("__rsub__", nb_subtract, slot_nb_subtract,
|
|
"-"),
|
|
BINSLOT("__mul__", nb_multiply, slot_nb_multiply,
|
|
"*"),
|
|
RBINSLOT("__rmul__", nb_multiply, slot_nb_multiply,
|
|
"*"),
|
|
BINSLOT("__div__", nb_divide, slot_nb_divide,
|
|
"/"),
|
|
RBINSLOT("__rdiv__", nb_divide, slot_nb_divide,
|
|
"/"),
|
|
BINSLOT("__mod__", nb_remainder, slot_nb_remainder,
|
|
"%"),
|
|
RBINSLOT("__rmod__", nb_remainder, slot_nb_remainder,
|
|
"%"),
|
|
BINSLOT("__divmod__", nb_divmod, slot_nb_divmod,
|
|
"divmod(x, y)"),
|
|
RBINSLOT("__rdivmod__", nb_divmod, slot_nb_divmod,
|
|
"divmod(y, x)"),
|
|
NBSLOT("__pow__", nb_power, slot_nb_power, wrap_ternaryfunc,
|
|
"x.__pow__(y[, z]) <==> pow(x, y[, z])"),
|
|
NBSLOT("__rpow__", nb_power, slot_nb_power, wrap_ternaryfunc_r,
|
|
"y.__rpow__(x[, z]) <==> pow(x, y[, z])"),
|
|
UNSLOT("__neg__", nb_negative, slot_nb_negative, wrap_unaryfunc, "-x"),
|
|
UNSLOT("__pos__", nb_positive, slot_nb_positive, wrap_unaryfunc, "+x"),
|
|
UNSLOT("__abs__", nb_absolute, slot_nb_absolute, wrap_unaryfunc,
|
|
"abs(x)"),
|
|
UNSLOT("__nonzero__", nb_nonzero, slot_nb_nonzero, wrap_inquiry,
|
|
"x != 0"),
|
|
UNSLOT("__invert__", nb_invert, slot_nb_invert, wrap_unaryfunc, "~x"),
|
|
BINSLOT("__lshift__", nb_lshift, slot_nb_lshift, "<<"),
|
|
RBINSLOT("__rlshift__", nb_lshift, slot_nb_lshift, "<<"),
|
|
BINSLOT("__rshift__", nb_rshift, slot_nb_rshift, ">>"),
|
|
RBINSLOT("__rrshift__", nb_rshift, slot_nb_rshift, ">>"),
|
|
BINSLOT("__and__", nb_and, slot_nb_and, "&"),
|
|
RBINSLOT("__rand__", nb_and, slot_nb_and, "&"),
|
|
BINSLOT("__xor__", nb_xor, slot_nb_xor, "^"),
|
|
RBINSLOT("__rxor__", nb_xor, slot_nb_xor, "^"),
|
|
BINSLOT("__or__", nb_or, slot_nb_or, "|"),
|
|
RBINSLOT("__ror__", nb_or, slot_nb_or, "|"),
|
|
NBSLOT("__coerce__", nb_coerce, slot_nb_coerce, wrap_coercefunc,
|
|
"x.__coerce__(y) <==> coerce(x, y)"),
|
|
UNSLOT("__int__", nb_int, slot_nb_int, wrap_unaryfunc,
|
|
"int(x)"),
|
|
UNSLOT("__long__", nb_long, slot_nb_long, wrap_unaryfunc,
|
|
"long(x)"),
|
|
UNSLOT("__float__", nb_float, slot_nb_float, wrap_unaryfunc,
|
|
"float(x)"),
|
|
UNSLOT("__oct__", nb_oct, slot_nb_oct, wrap_unaryfunc,
|
|
"oct(x)"),
|
|
UNSLOT("__hex__", nb_hex, slot_nb_hex, wrap_unaryfunc,
|
|
"hex(x)"),
|
|
IBSLOT("__iadd__", nb_inplace_add, slot_nb_inplace_add,
|
|
wrap_binaryfunc, "+"),
|
|
IBSLOT("__isub__", nb_inplace_subtract, slot_nb_inplace_subtract,
|
|
wrap_binaryfunc, "-"),
|
|
IBSLOT("__imul__", nb_inplace_multiply, slot_nb_inplace_multiply,
|
|
wrap_binaryfunc, "*"),
|
|
IBSLOT("__idiv__", nb_inplace_divide, slot_nb_inplace_divide,
|
|
wrap_binaryfunc, "/"),
|
|
IBSLOT("__imod__", nb_inplace_remainder, slot_nb_inplace_remainder,
|
|
wrap_binaryfunc, "%"),
|
|
IBSLOT("__ipow__", nb_inplace_power, slot_nb_inplace_power,
|
|
wrap_binaryfunc, "**"),
|
|
IBSLOT("__ilshift__", nb_inplace_lshift, slot_nb_inplace_lshift,
|
|
wrap_binaryfunc, "<<"),
|
|
IBSLOT("__irshift__", nb_inplace_rshift, slot_nb_inplace_rshift,
|
|
wrap_binaryfunc, ">>"),
|
|
IBSLOT("__iand__", nb_inplace_and, slot_nb_inplace_and,
|
|
wrap_binaryfunc, "&"),
|
|
IBSLOT("__ixor__", nb_inplace_xor, slot_nb_inplace_xor,
|
|
wrap_binaryfunc, "^"),
|
|
IBSLOT("__ior__", nb_inplace_or, slot_nb_inplace_or,
|
|
wrap_binaryfunc, "|"),
|
|
BINSLOT("__floordiv__", nb_floor_divide, slot_nb_floor_divide, "//"),
|
|
RBINSLOT("__rfloordiv__", nb_floor_divide, slot_nb_floor_divide, "//"),
|
|
BINSLOT("__truediv__", nb_true_divide, slot_nb_true_divide, "/"),
|
|
RBINSLOT("__rtruediv__", nb_true_divide, slot_nb_true_divide, "/"),
|
|
IBSLOT("__ifloordiv__", nb_inplace_floor_divide,
|
|
slot_nb_inplace_floor_divide, wrap_binaryfunc, "//"),
|
|
IBSLOT("__itruediv__", nb_inplace_true_divide,
|
|
slot_nb_inplace_true_divide, wrap_binaryfunc, "/"),
|
|
|
|
TPSLOT("__str__", tp_str, slot_tp_str, wrap_unaryfunc,
|
|
"x.__str__() <==> str(x)"),
|
|
TPSLOT("__str__", tp_print, NULL, NULL, ""),
|
|
TPSLOT("__repr__", tp_repr, slot_tp_repr, wrap_unaryfunc,
|
|
"x.__repr__() <==> repr(x)"),
|
|
TPSLOT("__repr__", tp_print, NULL, NULL, ""),
|
|
TPSLOT("__cmp__", tp_compare, _PyObject_SlotCompare, wrap_cmpfunc,
|
|
"x.__cmp__(y) <==> cmp(x,y)"),
|
|
TPSLOT("__hash__", tp_hash, slot_tp_hash, wrap_hashfunc,
|
|
"x.__hash__() <==> hash(x)"),
|
|
FLSLOT("__call__", tp_call, slot_tp_call, (wrapperfunc)wrap_call,
|
|
"x.__call__(...) <==> x(...)", PyWrapperFlag_KEYWORDS),
|
|
TPSLOT("__getattribute__", tp_getattro, slot_tp_getattr_hook,
|
|
wrap_binaryfunc, "x.__getattribute__('name') <==> x.name"),
|
|
TPSLOT("__getattribute__", tp_getattr, NULL, NULL, ""),
|
|
TPSLOT("__getattr__", tp_getattro, slot_tp_getattr_hook, NULL, ""),
|
|
TPSLOT("__getattr__", tp_getattr, NULL, NULL, ""),
|
|
TPSLOT("__setattr__", tp_setattro, slot_tp_setattro, wrap_setattr,
|
|
"x.__setattr__('name', value) <==> x.name = value"),
|
|
TPSLOT("__setattr__", tp_setattr, NULL, NULL, ""),
|
|
TPSLOT("__delattr__", tp_setattro, slot_tp_setattro, wrap_delattr,
|
|
"x.__delattr__('name') <==> del x.name"),
|
|
TPSLOT("__delattr__", tp_setattr, NULL, NULL, ""),
|
|
TPSLOT("__lt__", tp_richcompare, slot_tp_richcompare, richcmp_lt,
|
|
"x.__lt__(y) <==> x<y"),
|
|
TPSLOT("__le__", tp_richcompare, slot_tp_richcompare, richcmp_le,
|
|
"x.__le__(y) <==> x<=y"),
|
|
TPSLOT("__eq__", tp_richcompare, slot_tp_richcompare, richcmp_eq,
|
|
"x.__eq__(y) <==> x==y"),
|
|
TPSLOT("__ne__", tp_richcompare, slot_tp_richcompare, richcmp_ne,
|
|
"x.__ne__(y) <==> x!=y"),
|
|
TPSLOT("__gt__", tp_richcompare, slot_tp_richcompare, richcmp_gt,
|
|
"x.__gt__(y) <==> x>y"),
|
|
TPSLOT("__ge__", tp_richcompare, slot_tp_richcompare, richcmp_ge,
|
|
"x.__ge__(y) <==> x>=y"),
|
|
TPSLOT("__iter__", tp_iter, slot_tp_iter, wrap_unaryfunc,
|
|
"x.__iter__() <==> iter(x)"),
|
|
TPSLOT("next", tp_iternext, slot_tp_iternext, wrap_next,
|
|
"x.next() -> the next value, or raise StopIteration"),
|
|
TPSLOT("__get__", tp_descr_get, slot_tp_descr_get, wrap_descr_get,
|
|
"descr.__get__(obj[, type]) -> value"),
|
|
TPSLOT("__set__", tp_descr_set, slot_tp_descr_set, wrap_descr_set,
|
|
"descr.__set__(obj, value)"),
|
|
TPSLOT("__delete__", tp_descr_set, slot_tp_descr_set,
|
|
wrap_descr_delete, "descr.__delete__(obj)"),
|
|
FLSLOT("__init__", tp_init, slot_tp_init, (wrapperfunc)wrap_init,
|
|
"x.__init__(...) initializes x; "
|
|
"see x.__class__.__doc__ for signature",
|
|
PyWrapperFlag_KEYWORDS),
|
|
TPSLOT("__new__", tp_new, slot_tp_new, NULL, ""),
|
|
TPSLOT("__del__", tp_del, slot_tp_del, NULL, ""),
|
|
{NULL}
|
|
};
|
|
|
|
/* Given a type pointer and an offset gotten from a slotdef entry, return a
|
|
pointer to the actual slot. This is not quite the same as simply adding
|
|
the offset to the type pointer, since it takes care to indirect through the
|
|
proper indirection pointer (as_buffer, etc.); it returns NULL if the
|
|
indirection pointer is NULL. */
|
|
static void **
|
|
slotptr(PyTypeObject *type, int offset)
|
|
{
|
|
char *ptr;
|
|
|
|
/* Note: this depends on the order of the members of etype! */
|
|
assert(offset >= 0);
|
|
assert(offset < offsetof(etype, as_buffer));
|
|
if (offset >= offsetof(etype, as_sequence)) {
|
|
ptr = (void *)type->tp_as_sequence;
|
|
offset -= offsetof(etype, as_sequence);
|
|
}
|
|
else if (offset >= offsetof(etype, as_mapping)) {
|
|
ptr = (void *)type->tp_as_mapping;
|
|
offset -= offsetof(etype, as_mapping);
|
|
}
|
|
else if (offset >= offsetof(etype, as_number)) {
|
|
ptr = (void *)type->tp_as_number;
|
|
offset -= offsetof(etype, as_number);
|
|
}
|
|
else {
|
|
ptr = (void *)type;
|
|
}
|
|
if (ptr != NULL)
|
|
ptr += offset;
|
|
return (void **)ptr;
|
|
}
|
|
|
|
/* Length of array of slotdef pointers used to store slots with the
|
|
same __name__. There should be at most MAX_EQUIV-1 slotdef entries with
|
|
the same __name__, for any __name__. Since that's a static property, it is
|
|
appropriate to declare fixed-size arrays for this. */
|
|
#define MAX_EQUIV 10
|
|
|
|
/* Return a slot pointer for a given name, but ONLY if the attribute has
|
|
exactly one slot function. The name must be an interned string. */
|
|
static void **
|
|
resolve_slotdups(PyTypeObject *type, PyObject *name)
|
|
{
|
|
/* XXX Maybe this could be optimized more -- but is it worth it? */
|
|
|
|
/* pname and ptrs act as a little cache */
|
|
static PyObject *pname;
|
|
static slotdef *ptrs[MAX_EQUIV];
|
|
slotdef *p, **pp;
|
|
void **res, **ptr;
|
|
|
|
if (pname != name) {
|
|
/* Collect all slotdefs that match name into ptrs. */
|
|
pname = name;
|
|
pp = ptrs;
|
|
for (p = slotdefs; p->name_strobj; p++) {
|
|
if (p->name_strobj == name)
|
|
*pp++ = p;
|
|
}
|
|
*pp = NULL;
|
|
}
|
|
|
|
/* Look in all matching slots of the type; if exactly one of these has
|
|
a filled-in slot, return its value. Otherwise return NULL. */
|
|
res = NULL;
|
|
for (pp = ptrs; *pp; pp++) {
|
|
ptr = slotptr(type, (*pp)->offset);
|
|
if (ptr == NULL || *ptr == NULL)
|
|
continue;
|
|
if (res != NULL)
|
|
return NULL;
|
|
res = ptr;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
/* Common code for update_these_slots() and fixup_slot_dispatchers(). This
|
|
does some incredibly complex thinking and then sticks something into the
|
|
slot. (It sees if the adjacent slotdefs for the same slot have conflicting
|
|
interests, and then stores a generic wrapper or a specific function into
|
|
the slot.) Return a pointer to the next slotdef with a different offset,
|
|
because that's convenient for fixup_slot_dispatchers(). */
|
|
static slotdef *
|
|
update_one_slot(PyTypeObject *type, slotdef *p)
|
|
{
|
|
PyObject *descr;
|
|
PyWrapperDescrObject *d;
|
|
void *generic = NULL, *specific = NULL;
|
|
int use_generic = 0;
|
|
int offset = p->offset;
|
|
void **ptr = slotptr(type, offset);
|
|
|
|
if (ptr == NULL) {
|
|
do {
|
|
++p;
|
|
} while (p->offset == offset);
|
|
return p;
|
|
}
|
|
do {
|
|
descr = _PyType_Lookup(type, p->name_strobj);
|
|
if (descr == NULL)
|
|
continue;
|
|
if (descr->ob_type == &PyWrapperDescr_Type) {
|
|
void **tptr = resolve_slotdups(type, p->name_strobj);
|
|
if (tptr == NULL || tptr == ptr)
|
|
generic = p->function;
|
|
d = (PyWrapperDescrObject *)descr;
|
|
if (d->d_base->wrapper == p->wrapper &&
|
|
PyType_IsSubtype(type, d->d_type))
|
|
{
|
|
if (specific == NULL ||
|
|
specific == d->d_wrapped)
|
|
specific = d->d_wrapped;
|
|
else
|
|
use_generic = 1;
|
|
}
|
|
}
|
|
else if (descr->ob_type == &PyCFunction_Type &&
|
|
PyCFunction_GET_FUNCTION(descr) ==
|
|
(PyCFunction)tp_new_wrapper &&
|
|
strcmp(p->name, "__new__") == 0)
|
|
{
|
|
/* The __new__ wrapper is not a wrapper descriptor,
|
|
so must be special-cased differently.
|
|
If we don't do this, creating an instance will
|
|
always use slot_tp_new which will look up
|
|
__new__ in the MRO which will call tp_new_wrapper
|
|
which will look through the base classes looking
|
|
for a static base and call its tp_new (usually
|
|
PyType_GenericNew), after performing various
|
|
sanity checks and constructing a new argument
|
|
list. Cut all that nonsense short -- this speeds
|
|
up instance creation tremendously. */
|
|
specific = type->tp_new;
|
|
/* XXX I'm not 100% sure that there isn't a hole
|
|
in this reasoning that requires additional
|
|
sanity checks. I'll buy the first person to
|
|
point out a bug in this reasoning a beer. */
|
|
}
|
|
else {
|
|
use_generic = 1;
|
|
generic = p->function;
|
|
}
|
|
} while ((++p)->offset == offset);
|
|
if (specific && !use_generic)
|
|
*ptr = specific;
|
|
else
|
|
*ptr = generic;
|
|
return p;
|
|
}
|
|
|
|
static int recurse_down_subclasses(PyTypeObject *type, slotdef **pp,
|
|
PyObject *name);
|
|
|
|
/* In the type, update the slots whose slotdefs are gathered in the pp0 array,
|
|
and then do the same for all this type's subtypes. */
|
|
static int
|
|
update_these_slots(PyTypeObject *type, slotdef **pp0, PyObject *name)
|
|
{
|
|
slotdef **pp;
|
|
|
|
for (pp = pp0; *pp; pp++)
|
|
update_one_slot(type, *pp);
|
|
return recurse_down_subclasses(type, pp0, name);
|
|
}
|
|
|
|
/* Update the slots whose slotdefs are gathered in the pp array in all (direct
|
|
or indirect) subclasses of type. */
|
|
static int
|
|
recurse_down_subclasses(PyTypeObject *type, slotdef **pp, PyObject *name)
|
|
{
|
|
PyTypeObject *subclass;
|
|
PyObject *ref, *subclasses, *dict;
|
|
int i, n;
|
|
|
|
subclasses = type->tp_subclasses;
|
|
if (subclasses == NULL)
|
|
return 0;
|
|
assert(PyList_Check(subclasses));
|
|
n = PyList_GET_SIZE(subclasses);
|
|
for (i = 0; i < n; i++) {
|
|
ref = PyList_GET_ITEM(subclasses, i);
|
|
assert(PyWeakref_CheckRef(ref));
|
|
subclass = (PyTypeObject *)PyWeakref_GET_OBJECT(ref);
|
|
assert(subclass != NULL);
|
|
if ((PyObject *)subclass == Py_None)
|
|
continue;
|
|
assert(PyType_Check(subclass));
|
|
/* Avoid recursing down into unaffected classes */
|
|
dict = subclass->tp_dict;
|
|
if (dict != NULL && PyDict_Check(dict) &&
|
|
PyDict_GetItem(dict, name) != NULL)
|
|
continue;
|
|
if (update_these_slots(subclass, pp, name) < 0)
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Comparison function for qsort() to compare slotdefs by their offset, and
|
|
for equal offset by their address (to force a stable sort). */
|
|
static int
|
|
slotdef_cmp(const void *aa, const void *bb)
|
|
{
|
|
const slotdef *a = (const slotdef *)aa, *b = (const slotdef *)bb;
|
|
int c = a->offset - b->offset;
|
|
if (c != 0)
|
|
return c;
|
|
else
|
|
return a - b;
|
|
}
|
|
|
|
/* Initialize the slotdefs table by adding interned string objects for the
|
|
names and sorting the entries. */
|
|
static void
|
|
init_slotdefs(void)
|
|
{
|
|
slotdef *p;
|
|
static int initialized = 0;
|
|
|
|
if (initialized)
|
|
return;
|
|
for (p = slotdefs; p->name; p++) {
|
|
p->name_strobj = PyString_InternFromString(p->name);
|
|
if (!p->name_strobj)
|
|
Py_FatalError("Out of memory interning slotdef names");
|
|
}
|
|
qsort((void *)slotdefs, (size_t)(p-slotdefs), sizeof(slotdef),
|
|
slotdef_cmp);
|
|
initialized = 1;
|
|
}
|
|
|
|
/* Update the slots after assignment to a class (type) attribute. */
|
|
static int
|
|
update_slot(PyTypeObject *type, PyObject *name)
|
|
{
|
|
slotdef *ptrs[MAX_EQUIV];
|
|
slotdef *p;
|
|
slotdef **pp;
|
|
int offset;
|
|
|
|
init_slotdefs();
|
|
pp = ptrs;
|
|
for (p = slotdefs; p->name; p++) {
|
|
/* XXX assume name is interned! */
|
|
if (p->name_strobj == name)
|
|
*pp++ = p;
|
|
}
|
|
*pp = NULL;
|
|
for (pp = ptrs; *pp; pp++) {
|
|
p = *pp;
|
|
offset = p->offset;
|
|
while (p > slotdefs && (p-1)->offset == offset)
|
|
--p;
|
|
*pp = p;
|
|
}
|
|
if (ptrs[0] == NULL)
|
|
return 0; /* Not an attribute that affects any slots */
|
|
return update_these_slots(type, ptrs, name);
|
|
}
|
|
|
|
/* Store the proper functions in the slot dispatches at class (type)
|
|
definition time, based upon which operations the class overrides in its
|
|
dict. */
|
|
static void
|
|
fixup_slot_dispatchers(PyTypeObject *type)
|
|
{
|
|
slotdef *p;
|
|
|
|
init_slotdefs();
|
|
for (p = slotdefs; p->name; )
|
|
p = update_one_slot(type, p);
|
|
}
|
|
|
|
static void
|
|
update_all_slots(PyTypeObject* type)
|
|
{
|
|
slotdef *p;
|
|
|
|
init_slotdefs();
|
|
for (p = slotdefs; p->name; p++) {
|
|
/* update_slot returns int but can't actually fail */
|
|
update_slot(type, p->name_strobj);
|
|
}
|
|
}
|
|
|
|
/* This function is called by PyType_Ready() to populate the type's
|
|
dictionary with method descriptors for function slots. For each
|
|
function slot (like tp_repr) that's defined in the type, one or more
|
|
corresponding descriptors are added in the type's tp_dict dictionary
|
|
under the appropriate name (like __repr__). Some function slots
|
|
cause more than one descriptor to be added (for example, the nb_add
|
|
slot adds both __add__ and __radd__ descriptors) and some function
|
|
slots compete for the same descriptor (for example both sq_item and
|
|
mp_subscript generate a __getitem__ descriptor).
|
|
|
|
In the latter case, the first slotdef entry encoutered wins. Since
|
|
slotdef entries are sorted by the offset of the slot in the etype
|
|
struct, this gives us some control over disambiguating between
|
|
competing slots: the members of struct etype are listed from most
|
|
general to least general, so the most general slot is preferred. In
|
|
particular, because as_mapping comes before as_sequence, for a type
|
|
that defines both mp_subscript and sq_item, mp_subscript wins.
|
|
|
|
This only adds new descriptors and doesn't overwrite entries in
|
|
tp_dict that were previously defined. The descriptors contain a
|
|
reference to the C function they must call, so that it's safe if they
|
|
are copied into a subtype's __dict__ and the subtype has a different
|
|
C function in its slot -- calling the method defined by the
|
|
descriptor will call the C function that was used to create it,
|
|
rather than the C function present in the slot when it is called.
|
|
(This is important because a subtype may have a C function in the
|
|
slot that calls the method from the dictionary, and we want to avoid
|
|
infinite recursion here.) */
|
|
|
|
static int
|
|
add_operators(PyTypeObject *type)
|
|
{
|
|
PyObject *dict = type->tp_dict;
|
|
slotdef *p;
|
|
PyObject *descr;
|
|
void **ptr;
|
|
|
|
init_slotdefs();
|
|
for (p = slotdefs; p->name; p++) {
|
|
if (p->wrapper == NULL)
|
|
continue;
|
|
ptr = slotptr(type, p->offset);
|
|
if (!ptr || !*ptr)
|
|
continue;
|
|
if (PyDict_GetItem(dict, p->name_strobj))
|
|
continue;
|
|
descr = PyDescr_NewWrapper(type, p, *ptr);
|
|
if (descr == NULL)
|
|
return -1;
|
|
if (PyDict_SetItem(dict, p->name_strobj, descr) < 0)
|
|
return -1;
|
|
Py_DECREF(descr);
|
|
}
|
|
if (type->tp_new != NULL) {
|
|
if (add_tp_new_wrapper(type) < 0)
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* Cooperative 'super' */
|
|
|
|
typedef struct {
|
|
PyObject_HEAD
|
|
PyTypeObject *type;
|
|
PyObject *obj;
|
|
} superobject;
|
|
|
|
static PyMemberDef super_members[] = {
|
|
{"__thisclass__", T_OBJECT, offsetof(superobject, type), READONLY,
|
|
"the class invoking super()"},
|
|
{"__self__", T_OBJECT, offsetof(superobject, obj), READONLY,
|
|
"the instance invoking super(); may be None"},
|
|
{0}
|
|
};
|
|
|
|
static void
|
|
super_dealloc(PyObject *self)
|
|
{
|
|
superobject *su = (superobject *)self;
|
|
|
|
_PyObject_GC_UNTRACK(self);
|
|
Py_XDECREF(su->obj);
|
|
Py_XDECREF(su->type);
|
|
self->ob_type->tp_free(self);
|
|
}
|
|
|
|
static PyObject *
|
|
super_repr(PyObject *self)
|
|
{
|
|
superobject *su = (superobject *)self;
|
|
|
|
if (su->obj)
|
|
return PyString_FromFormat(
|
|
"<super: <class '%s'>, <%s object>>",
|
|
su->type ? su->type->tp_name : "NULL",
|
|
su->obj->ob_type->tp_name);
|
|
else
|
|
return PyString_FromFormat(
|
|
"<super: <class '%s'>, NULL>",
|
|
su->type ? su->type->tp_name : "NULL");
|
|
}
|
|
|
|
static PyObject *
|
|
super_getattro(PyObject *self, PyObject *name)
|
|
{
|
|
superobject *su = (superobject *)self;
|
|
|
|
if (su->obj != NULL) {
|
|
PyObject *mro, *res, *tmp, *dict;
|
|
PyTypeObject *starttype;
|
|
descrgetfunc f;
|
|
int i, n;
|
|
|
|
starttype = su->obj->ob_type;
|
|
mro = starttype->tp_mro;
|
|
|
|
if (mro == NULL)
|
|
n = 0;
|
|
else {
|
|
assert(PyTuple_Check(mro));
|
|
n = PyTuple_GET_SIZE(mro);
|
|
}
|
|
for (i = 0; i < n; i++) {
|
|
if ((PyObject *)(su->type) == PyTuple_GET_ITEM(mro, i))
|
|
break;
|
|
}
|
|
if (i >= n && PyType_Check(su->obj)) {
|
|
starttype = (PyTypeObject *)(su->obj);
|
|
mro = starttype->tp_mro;
|
|
if (mro == NULL)
|
|
n = 0;
|
|
else {
|
|
assert(PyTuple_Check(mro));
|
|
n = PyTuple_GET_SIZE(mro);
|
|
}
|
|
for (i = 0; i < n; i++) {
|
|
if ((PyObject *)(su->type) ==
|
|
PyTuple_GET_ITEM(mro, i))
|
|
break;
|
|
}
|
|
}
|
|
i++;
|
|
res = NULL;
|
|
for (; i < n; i++) {
|
|
tmp = PyTuple_GET_ITEM(mro, i);
|
|
if (PyType_Check(tmp))
|
|
dict = ((PyTypeObject *)tmp)->tp_dict;
|
|
else if (PyClass_Check(tmp))
|
|
dict = ((PyClassObject *)tmp)->cl_dict;
|
|
else
|
|
continue;
|
|
res = PyDict_GetItem(dict, name);
|
|
if (res != NULL && !PyDescr_IsData(res)) {
|
|
Py_INCREF(res);
|
|
f = res->ob_type->tp_descr_get;
|
|
if (f != NULL) {
|
|
tmp = f(res, su->obj,
|
|
(PyObject *)starttype);
|
|
Py_DECREF(res);
|
|
res = tmp;
|
|
}
|
|
return res;
|
|
}
|
|
}
|
|
}
|
|
return PyObject_GenericGetAttr(self, name);
|
|
}
|
|
|
|
static int
|
|
supercheck(PyTypeObject *type, PyObject *obj)
|
|
{
|
|
if (!PyType_IsSubtype(obj->ob_type, type) &&
|
|
!(PyType_Check(obj) &&
|
|
PyType_IsSubtype((PyTypeObject *)obj, type))) {
|
|
PyErr_SetString(PyExc_TypeError,
|
|
"super(type, obj): "
|
|
"obj must be an instance or subtype of type");
|
|
return -1;
|
|
}
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
static PyObject *
|
|
super_descr_get(PyObject *self, PyObject *obj, PyObject *type)
|
|
{
|
|
superobject *su = (superobject *)self;
|
|
superobject *new;
|
|
|
|
if (obj == NULL || obj == Py_None || su->obj != NULL) {
|
|
/* Not binding to an object, or already bound */
|
|
Py_INCREF(self);
|
|
return self;
|
|
}
|
|
if (su->ob_type != &PySuper_Type)
|
|
/* If su is an instance of a subclass of super,
|
|
call its type */
|
|
return PyObject_CallFunction((PyObject *)su->ob_type,
|
|
"OO", su->type, obj);
|
|
else {
|
|
/* Inline the common case */
|
|
if (supercheck(su->type, obj) < 0)
|
|
return NULL;
|
|
new = (superobject *)PySuper_Type.tp_new(&PySuper_Type,
|
|
NULL, NULL);
|
|
if (new == NULL)
|
|
return NULL;
|
|
Py_INCREF(su->type);
|
|
Py_INCREF(obj);
|
|
new->type = su->type;
|
|
new->obj = obj;
|
|
return (PyObject *)new;
|
|
}
|
|
}
|
|
|
|
static int
|
|
super_init(PyObject *self, PyObject *args, PyObject *kwds)
|
|
{
|
|
superobject *su = (superobject *)self;
|
|
PyTypeObject *type;
|
|
PyObject *obj = NULL;
|
|
|
|
if (!PyArg_ParseTuple(args, "O!|O:super", &PyType_Type, &type, &obj))
|
|
return -1;
|
|
if (obj == Py_None)
|
|
obj = NULL;
|
|
if (obj != NULL && supercheck(type, obj) < 0)
|
|
return -1;
|
|
Py_INCREF(type);
|
|
Py_XINCREF(obj);
|
|
su->type = type;
|
|
su->obj = obj;
|
|
return 0;
|
|
}
|
|
|
|
PyDoc_STRVAR(super_doc,
|
|
"super(type) -> unbound super object\n"
|
|
"super(type, obj) -> bound super object; requires isinstance(obj, type)\n"
|
|
"super(type, type2) -> bound super object; requires issubclass(type2, type)\n"
|
|
"Typical use to call a cooperative superclass method:\n"
|
|
"class C(B):\n"
|
|
" def meth(self, arg):\n"
|
|
" super(C, self).meth(arg)");
|
|
|
|
static int
|
|
super_traverse(PyObject *self, visitproc visit, void *arg)
|
|
{
|
|
superobject *su = (superobject *)self;
|
|
int err;
|
|
|
|
#define VISIT(SLOT) \
|
|
if (SLOT) { \
|
|
err = visit((PyObject *)(SLOT), arg); \
|
|
if (err) \
|
|
return err; \
|
|
}
|
|
|
|
VISIT(su->obj);
|
|
VISIT(su->type);
|
|
|
|
#undef VISIT
|
|
|
|
return 0;
|
|
}
|
|
|
|
PyTypeObject PySuper_Type = {
|
|
PyObject_HEAD_INIT(&PyType_Type)
|
|
0, /* ob_size */
|
|
"super", /* tp_name */
|
|
sizeof(superobject), /* tp_basicsize */
|
|
0, /* tp_itemsize */
|
|
/* methods */
|
|
super_dealloc, /* tp_dealloc */
|
|
0, /* tp_print */
|
|
0, /* tp_getattr */
|
|
0, /* tp_setattr */
|
|
0, /* tp_compare */
|
|
super_repr, /* tp_repr */
|
|
0, /* tp_as_number */
|
|
0, /* tp_as_sequence */
|
|
0, /* tp_as_mapping */
|
|
0, /* tp_hash */
|
|
0, /* tp_call */
|
|
0, /* tp_str */
|
|
super_getattro, /* tp_getattro */
|
|
0, /* tp_setattro */
|
|
0, /* tp_as_buffer */
|
|
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
|
|
Py_TPFLAGS_BASETYPE, /* tp_flags */
|
|
super_doc, /* tp_doc */
|
|
super_traverse, /* tp_traverse */
|
|
0, /* tp_clear */
|
|
0, /* tp_richcompare */
|
|
0, /* tp_weaklistoffset */
|
|
0, /* tp_iter */
|
|
0, /* tp_iternext */
|
|
0, /* tp_methods */
|
|
super_members, /* tp_members */
|
|
0, /* tp_getset */
|
|
0, /* tp_base */
|
|
0, /* tp_dict */
|
|
super_descr_get, /* tp_descr_get */
|
|
0, /* tp_descr_set */
|
|
0, /* tp_dictoffset */
|
|
super_init, /* tp_init */
|
|
PyType_GenericAlloc, /* tp_alloc */
|
|
PyType_GenericNew, /* tp_new */
|
|
PyObject_GC_Del, /* tp_free */
|
|
};
|