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Copy pathdescrobject.c
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1924 lines (1704 loc) · 62.3 KB
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/* Descriptors -- a new, flexible way to describe attributes */
#include "Python.h"
#include "pycore_ceval.h" // _Py_EnterRecursiveCall()
#include "pycore_object.h" // _PyObject_GC_UNTRACK()
#include "pycore_pystate.h" // _PyThreadState_GET()
#include "pycore_tuple.h" // _PyTuple_ITEMS()
#include "structmember.h" // PyMemberDef
_Py_IDENTIFIER(getattr);
/*[clinic input]
class mappingproxy "mappingproxyobject *" "&PyDictProxy_Type"
class property "propertyobject *" "&PyProperty_Type"
[clinic start generated code]*/
/*[clinic end generated code: output=da39a3ee5e6b4b0d input=556352653fd4c02e]*/
static void
descr_dealloc(PyDescrObject *descr)
{
Py_XDECREF(descr->d_type);
Py_XDECREF(descr->d_name);
Py_XDECREF(descr->d_qualname);
PyObject_GC_Del(descr);
}
static PyObject *
descr_name(PyDescrObject *descr)
{
if (descr->d_name != NULL && PyUnicode_Check(descr->d_name))
return descr->d_name;
return NULL;
}
static PyObject *
descr_repr(PyDescrObject *descr, const char *format)
{
PyObject *name = NULL;
if (descr->d_name != NULL && PyUnicode_Check(descr->d_name))
name = descr->d_name;
return PyUnicode_FromFormat(format, name, "?", descr->d_type->tp_name);
}
static PyObject *
method_repr(PyMethodDescrObject *descr)
{
return descr_repr((PyDescrObject *)descr,
"<method '%V' of '%s' objects>");
}
static PyObject *
member_repr(PyMemberDescrObject *descr)
{
return descr_repr((PyDescrObject *)descr,
"<member '%V' of '%s' objects>");
}
static PyObject *
getset_repr(PyGetSetDescrObject *descr)
{
return descr_repr((PyDescrObject *)descr,
"<attribute '%V' of '%s' objects>");
}
static PyObject *
wrapperdescr_repr(PyWrapperDescrObject *descr)
{
return descr_repr((PyDescrObject *)descr,
"<slot wrapper '%V' of '%s' objects>");
}
static int
descr_check(PyDescrObject *descr, PyObject *obj, PyObject **pres)
{
if (obj == NULL) {
Py_INCREF(descr);
*pres = (PyObject *)descr;
return 1;
}
if (!PyObject_TypeCheck(obj, descr->d_type)) {
PyErr_Format(PyExc_TypeError,
"descriptor '%V' for '%.100s' objects "
"doesn't apply to a '%.100s' object",
descr_name((PyDescrObject *)descr), "?",
descr->d_type->tp_name,
Py_TYPE(obj)->tp_name);
*pres = NULL;
return 1;
}
return 0;
}
static PyObject *
classmethod_get(PyMethodDescrObject *descr, PyObject *obj, PyObject *type)
{
/* Ensure a valid type. Class methods ignore obj. */
if (type == NULL) {
if (obj != NULL)
type = (PyObject *)Py_TYPE(obj);
else {
/* Wot - no type?! */
PyErr_Format(PyExc_TypeError,
"descriptor '%V' for type '%.100s' "
"needs either an object or a type",
descr_name((PyDescrObject *)descr), "?",
PyDescr_TYPE(descr)->tp_name);
return NULL;
}
}
if (!PyType_Check(type)) {
PyErr_Format(PyExc_TypeError,
"descriptor '%V' for type '%.100s' "
"needs a type, not a '%.100s' as arg 2",
descr_name((PyDescrObject *)descr), "?",
PyDescr_TYPE(descr)->tp_name,
Py_TYPE(type)->tp_name);
return NULL;
}
if (!PyType_IsSubtype((PyTypeObject *)type, PyDescr_TYPE(descr))) {
PyErr_Format(PyExc_TypeError,
"descriptor '%V' requires a subtype of '%.100s' "
"but received '%.100s'",
descr_name((PyDescrObject *)descr), "?",
PyDescr_TYPE(descr)->tp_name,
((PyTypeObject *)type)->tp_name);
return NULL;
}
PyTypeObject *cls = NULL;
if (descr->d_method->ml_flags & METH_METHOD) {
cls = descr->d_common.d_type;
}
return PyCMethod_New(descr->d_method, type, NULL, cls);
}
static PyObject *
method_get(PyMethodDescrObject *descr, PyObject *obj, PyObject *type)
{
PyObject *res;
if (descr_check((PyDescrObject *)descr, obj, &res))
return res;
if (descr->d_method->ml_flags & METH_METHOD) {
if (PyType_Check(type)) {
return PyCMethod_New(descr->d_method, obj, NULL, descr->d_common.d_type);
} else {
PyErr_Format(PyExc_TypeError,
"descriptor '%V' needs a type, not '%s', as arg 2",
descr_name((PyDescrObject *)descr),
Py_TYPE(type)->tp_name);
return NULL;
}
} else {
return PyCFunction_NewEx(descr->d_method, obj, NULL);
}
}
static PyObject *
member_get(PyMemberDescrObject *descr, PyObject *obj, PyObject *type)
{
PyObject *res;
if (descr_check((PyDescrObject *)descr, obj, &res))
return res;
if (descr->d_member->flags & PY_AUDIT_READ) {
if (PySys_Audit("object.__getattr__", "Os",
obj ? obj : Py_None, descr->d_member->name) < 0) {
return NULL;
}
}
return PyMember_GetOne((char *)obj, descr->d_member);
}
static PyObject *
getset_get(PyGetSetDescrObject *descr, PyObject *obj, PyObject *type)
{
PyObject *res;
if (descr_check((PyDescrObject *)descr, obj, &res))
return res;
if (descr->d_getset->get != NULL)
return descr->d_getset->get(obj, descr->d_getset->closure);
PyErr_Format(PyExc_AttributeError,
"attribute '%V' of '%.100s' objects is not readable",
descr_name((PyDescrObject *)descr), "?",
PyDescr_TYPE(descr)->tp_name);
return NULL;
}
static PyObject *
wrapperdescr_get(PyWrapperDescrObject *descr, PyObject *obj, PyObject *type)
{
PyObject *res;
if (descr_check((PyDescrObject *)descr, obj, &res))
return res;
return PyWrapper_New((PyObject *)descr, obj);
}
static int
descr_setcheck(PyDescrObject *descr, PyObject *obj, PyObject *value,
int *pres)
{
assert(obj != NULL);
if (!PyObject_TypeCheck(obj, descr->d_type)) {
PyErr_Format(PyExc_TypeError,
"descriptor '%V' for '%.100s' objects "
"doesn't apply to a '%.100s' object",
descr_name(descr), "?",
descr->d_type->tp_name,
Py_TYPE(obj)->tp_name);
*pres = -1;
return 1;
}
return 0;
}
static int
member_set(PyMemberDescrObject *descr, PyObject *obj, PyObject *value)
{
int res;
if (descr_setcheck((PyDescrObject *)descr, obj, value, &res))
return res;
return PyMember_SetOne((char *)obj, descr->d_member, value);
}
static int
getset_set(PyGetSetDescrObject *descr, PyObject *obj, PyObject *value)
{
int res;
if (descr_setcheck((PyDescrObject *)descr, obj, value, &res))
return res;
if (descr->d_getset->set != NULL)
return descr->d_getset->set(obj, value,
descr->d_getset->closure);
PyErr_Format(PyExc_AttributeError,
"attribute '%V' of '%.100s' objects is not writable",
descr_name((PyDescrObject *)descr), "?",
PyDescr_TYPE(descr)->tp_name);
return -1;
}
/* Vectorcall functions for each of the PyMethodDescr calling conventions.
*
* First, common helpers
*/
static inline int
method_check_args(PyObject *func, PyObject *const *args, Py_ssize_t nargs, PyObject *kwnames)
{
assert(!PyErr_Occurred());
if (nargs < 1) {
PyObject *funcstr = _PyObject_FunctionStr(func);
if (funcstr != NULL) {
PyErr_Format(PyExc_TypeError,
"unbound method %U needs an argument", funcstr);
Py_DECREF(funcstr);
}
return -1;
}
PyObject *self = args[0];
PyObject *dummy;
if (descr_check((PyDescrObject *)func, self, &dummy)) {
return -1;
}
if (kwnames && PyTuple_GET_SIZE(kwnames)) {
PyObject *funcstr = _PyObject_FunctionStr(func);
if (funcstr != NULL) {
PyErr_Format(PyExc_TypeError,
"%U takes no keyword arguments", funcstr);
Py_DECREF(funcstr);
}
return -1;
}
return 0;
}
typedef void (*funcptr)(void);
static inline funcptr
method_enter_call(PyThreadState *tstate, PyObject *func)
{
if (_Py_EnterRecursiveCall(tstate, " while calling a Python object")) {
return NULL;
}
return (funcptr)((PyMethodDescrObject *)func)->d_method->ml_meth;
}
/* Now the actual vectorcall functions */
static PyObject *
method_vectorcall_VARARGS(
PyObject *func, PyObject *const *args, size_t nargsf, PyObject *kwnames)
{
PyThreadState *tstate = _PyThreadState_GET();
Py_ssize_t nargs = PyVectorcall_NARGS(nargsf);
if (method_check_args(func, args, nargs, kwnames)) {
return NULL;
}
PyObject *argstuple = _PyTuple_FromArray(args+1, nargs-1);
if (argstuple == NULL) {
return NULL;
}
PyCFunction meth = (PyCFunction)method_enter_call(tstate, func);
if (meth == NULL) {
Py_DECREF(argstuple);
return NULL;
}
PyObject *result = meth(args[0], argstuple);
Py_DECREF(argstuple);
_Py_LeaveRecursiveCall(tstate);
return result;
}
static PyObject *
method_vectorcall_VARARGS_KEYWORDS(
PyObject *func, PyObject *const *args, size_t nargsf, PyObject *kwnames)
{
PyThreadState *tstate = _PyThreadState_GET();
Py_ssize_t nargs = PyVectorcall_NARGS(nargsf);
if (method_check_args(func, args, nargs, NULL)) {
return NULL;
}
PyObject *argstuple = _PyTuple_FromArray(args+1, nargs-1);
if (argstuple == NULL) {
return NULL;
}
PyObject *result = NULL;
/* Create a temporary dict for keyword arguments */
PyObject *kwdict = NULL;
if (kwnames != NULL && PyTuple_GET_SIZE(kwnames) > 0) {
kwdict = _PyStack_AsDict(args + nargs, kwnames);
if (kwdict == NULL) {
goto exit;
}
}
PyCFunctionWithKeywords meth = (PyCFunctionWithKeywords)
method_enter_call(tstate, func);
if (meth == NULL) {
goto exit;
}
result = meth(args[0], argstuple, kwdict);
_Py_LeaveRecursiveCall(tstate);
exit:
Py_DECREF(argstuple);
Py_XDECREF(kwdict);
return result;
}
static PyObject *
method_vectorcall_FASTCALL_KEYWORDS_METHOD(
PyObject *func, PyObject *const *args, size_t nargsf, PyObject *kwnames)
{
PyThreadState *tstate = _PyThreadState_GET();
Py_ssize_t nargs = PyVectorcall_NARGS(nargsf);
if (method_check_args(func, args, nargs, NULL)) {
return NULL;
}
PyCMethod meth = (PyCMethod) method_enter_call(tstate, func);
if (meth == NULL) {
return NULL;
}
PyObject *result = meth(args[0],
((PyMethodDescrObject *)func)->d_common.d_type,
args+1, nargs-1, kwnames);
Py_LeaveRecursiveCall();
return result;
}
static PyObject *
method_vectorcall_FASTCALL(
PyObject *func, PyObject *const *args, size_t nargsf, PyObject *kwnames)
{
PyThreadState *tstate = _PyThreadState_GET();
Py_ssize_t nargs = PyVectorcall_NARGS(nargsf);
if (method_check_args(func, args, nargs, kwnames)) {
return NULL;
}
_PyCFunctionFast meth = (_PyCFunctionFast)
method_enter_call(tstate, func);
if (meth == NULL) {
return NULL;
}
PyObject *result = meth(args[0], args+1, nargs-1);
_Py_LeaveRecursiveCall(tstate);
return result;
}
static PyObject *
method_vectorcall_FASTCALL_KEYWORDS(
PyObject *func, PyObject *const *args, size_t nargsf, PyObject *kwnames)
{
PyThreadState *tstate = _PyThreadState_GET();
Py_ssize_t nargs = PyVectorcall_NARGS(nargsf);
if (method_check_args(func, args, nargs, NULL)) {
return NULL;
}
_PyCFunctionFastWithKeywords meth = (_PyCFunctionFastWithKeywords)
method_enter_call(tstate, func);
if (meth == NULL) {
return NULL;
}
PyObject *result = meth(args[0], args+1, nargs-1, kwnames);
_Py_LeaveRecursiveCall(tstate);
return result;
}
static PyObject *
method_vectorcall_NOARGS(
PyObject *func, PyObject *const *args, size_t nargsf, PyObject *kwnames)
{
PyThreadState *tstate = _PyThreadState_GET();
Py_ssize_t nargs = PyVectorcall_NARGS(nargsf);
if (method_check_args(func, args, nargs, kwnames)) {
return NULL;
}
if (nargs != 1) {
PyObject *funcstr = _PyObject_FunctionStr(func);
if (funcstr != NULL) {
PyErr_Format(PyExc_TypeError,
"%U takes no arguments (%zd given)", funcstr, nargs-1);
Py_DECREF(funcstr);
}
return NULL;
}
PyCFunction meth = (PyCFunction)method_enter_call(tstate, func);
if (meth == NULL) {
return NULL;
}
PyObject *result = meth(args[0], NULL);
_Py_LeaveRecursiveCall(tstate);
return result;
}
static PyObject *
method_vectorcall_O(
PyObject *func, PyObject *const *args, size_t nargsf, PyObject *kwnames)
{
PyThreadState *tstate = _PyThreadState_GET();
Py_ssize_t nargs = PyVectorcall_NARGS(nargsf);
if (method_check_args(func, args, nargs, kwnames)) {
return NULL;
}
if (nargs != 2) {
PyObject *funcstr = _PyObject_FunctionStr(func);
if (funcstr != NULL) {
PyErr_Format(PyExc_TypeError,
"%U takes exactly one argument (%zd given)",
funcstr, nargs-1);
Py_DECREF(funcstr);
}
return NULL;
}
PyCFunction meth = (PyCFunction)method_enter_call(tstate, func);
if (meth == NULL) {
return NULL;
}
PyObject *result = meth(args[0], args[1]);
_Py_LeaveRecursiveCall(tstate);
return result;
}
/* Instances of classmethod_descriptor are unlikely to be called directly.
For one, the analogous class "classmethod" (for Python classes) is not
callable. Second, users are not likely to access a classmethod_descriptor
directly, since it means pulling it from the class __dict__.
This is just an excuse to say that this doesn't need to be optimized:
we implement this simply by calling __get__ and then calling the result.
*/
static PyObject *
classmethoddescr_call(PyMethodDescrObject *descr, PyObject *args,
PyObject *kwds)
{
Py_ssize_t argc = PyTuple_GET_SIZE(args);
if (argc < 1) {
PyErr_Format(PyExc_TypeError,
"descriptor '%V' of '%.100s' "
"object needs an argument",
descr_name((PyDescrObject *)descr), "?",
PyDescr_TYPE(descr)->tp_name);
return NULL;
}
PyObject *self = PyTuple_GET_ITEM(args, 0);
PyObject *bound = classmethod_get(descr, NULL, self);
if (bound == NULL) {
return NULL;
}
PyObject *res = PyObject_VectorcallDict(bound, _PyTuple_ITEMS(args)+1,
argc-1, kwds);
Py_DECREF(bound);
return res;
}
Py_LOCAL_INLINE(PyObject *)
wrapperdescr_raw_call(PyWrapperDescrObject *descr, PyObject *self,
PyObject *args, PyObject *kwds)
{
wrapperfunc wrapper = descr->d_base->wrapper;
if (descr->d_base->flags & PyWrapperFlag_KEYWORDS) {
wrapperfunc_kwds wk = (wrapperfunc_kwds)(void(*)(void))wrapper;
return (*wk)(self, args, descr->d_wrapped, kwds);
}
if (kwds != NULL && (!PyDict_Check(kwds) || PyDict_GET_SIZE(kwds) != 0)) {
PyErr_Format(PyExc_TypeError,
"wrapper %s() takes no keyword arguments",
descr->d_base->name);
return NULL;
}
return (*wrapper)(self, args, descr->d_wrapped);
}
static PyObject *
wrapperdescr_call(PyWrapperDescrObject *descr, PyObject *args, PyObject *kwds)
{
Py_ssize_t argc;
PyObject *self, *result;
/* Make sure that the first argument is acceptable as 'self' */
assert(PyTuple_Check(args));
argc = PyTuple_GET_SIZE(args);
if (argc < 1) {
PyErr_Format(PyExc_TypeError,
"descriptor '%V' of '%.100s' "
"object needs an argument",
descr_name((PyDescrObject *)descr), "?",
PyDescr_TYPE(descr)->tp_name);
return NULL;
}
self = PyTuple_GET_ITEM(args, 0);
if (!_PyObject_RealIsSubclass((PyObject *)Py_TYPE(self),
(PyObject *)PyDescr_TYPE(descr))) {
PyErr_Format(PyExc_TypeError,
"descriptor '%V' "
"requires a '%.100s' object "
"but received a '%.100s'",
descr_name((PyDescrObject *)descr), "?",
PyDescr_TYPE(descr)->tp_name,
Py_TYPE(self)->tp_name);
return NULL;
}
args = PyTuple_GetSlice(args, 1, argc);
if (args == NULL) {
return NULL;
}
result = wrapperdescr_raw_call(descr, self, args, kwds);
Py_DECREF(args);
return result;
}
static PyObject *
method_get_doc(PyMethodDescrObject *descr, void *closure)
{
return _PyType_GetDocFromInternalDoc(descr->d_method->ml_name, descr->d_method->ml_doc);
}
static PyObject *
method_get_text_signature(PyMethodDescrObject *descr, void *closure)
{
return _PyType_GetTextSignatureFromInternalDoc(descr->d_method->ml_name, descr->d_method->ml_doc);
}
static PyObject *
calculate_qualname(PyDescrObject *descr)
{
PyObject *type_qualname, *res;
_Py_IDENTIFIER(__qualname__);
if (descr->d_name == NULL || !PyUnicode_Check(descr->d_name)) {
PyErr_SetString(PyExc_TypeError,
"<descriptor>.__name__ is not a unicode object");
return NULL;
}
type_qualname = _PyObject_GetAttrId((PyObject *)descr->d_type,
&PyId___qualname__);
if (type_qualname == NULL)
return NULL;
if (!PyUnicode_Check(type_qualname)) {
PyErr_SetString(PyExc_TypeError, "<descriptor>.__objclass__."
"__qualname__ is not a unicode object");
Py_XDECREF(type_qualname);
return NULL;
}
res = PyUnicode_FromFormat("%S.%S", type_qualname, descr->d_name);
Py_DECREF(type_qualname);
return res;
}
static PyObject *
descr_get_qualname(PyDescrObject *descr, void *Py_UNUSED(ignored))
{
if (descr->d_qualname == NULL)
descr->d_qualname = calculate_qualname(descr);
Py_XINCREF(descr->d_qualname);
return descr->d_qualname;
}
static PyObject *
descr_reduce(PyDescrObject *descr, PyObject *Py_UNUSED(ignored))
{
return Py_BuildValue("N(OO)", _PyEval_GetBuiltinId(&PyId_getattr),
PyDescr_TYPE(descr), PyDescr_NAME(descr));
}
static PyMethodDef descr_methods[] = {
{"__reduce__", (PyCFunction)descr_reduce, METH_NOARGS, NULL},
{NULL, NULL}
};
static PyMemberDef descr_members[] = {
{"__objclass__", T_OBJECT, offsetof(PyDescrObject, d_type), READONLY},
{"__name__", T_OBJECT, offsetof(PyDescrObject, d_name), READONLY},
{0}
};
static PyGetSetDef method_getset[] = {
{"__doc__", (getter)method_get_doc},
{"__qualname__", (getter)descr_get_qualname},
{"__text_signature__", (getter)method_get_text_signature},
{0}
};
static PyObject *
member_get_doc(PyMemberDescrObject *descr, void *closure)
{
if (descr->d_member->doc == NULL) {
Py_RETURN_NONE;
}
return PyUnicode_FromString(descr->d_member->doc);
}
static PyGetSetDef member_getset[] = {
{"__doc__", (getter)member_get_doc},
{"__qualname__", (getter)descr_get_qualname},
{0}
};
static PyObject *
getset_get_doc(PyGetSetDescrObject *descr, void *closure)
{
if (descr->d_getset->doc == NULL) {
Py_RETURN_NONE;
}
return PyUnicode_FromString(descr->d_getset->doc);
}
static PyGetSetDef getset_getset[] = {
{"__doc__", (getter)getset_get_doc},
{"__qualname__", (getter)descr_get_qualname},
{0}
};
static PyObject *
wrapperdescr_get_doc(PyWrapperDescrObject *descr, void *closure)
{
return _PyType_GetDocFromInternalDoc(descr->d_base->name, descr->d_base->doc);
}
static PyObject *
wrapperdescr_get_text_signature(PyWrapperDescrObject *descr, void *closure)
{
return _PyType_GetTextSignatureFromInternalDoc(descr->d_base->name, descr->d_base->doc);
}
static PyGetSetDef wrapperdescr_getset[] = {
{"__doc__", (getter)wrapperdescr_get_doc},
{"__qualname__", (getter)descr_get_qualname},
{"__text_signature__", (getter)wrapperdescr_get_text_signature},
{0}
};
static int
descr_traverse(PyObject *self, visitproc visit, void *arg)
{
PyDescrObject *descr = (PyDescrObject *)self;
Py_VISIT(descr->d_type);
return 0;
}
PyTypeObject PyMethodDescr_Type = {
PyVarObject_HEAD_INIT(&PyType_Type, 0)
"method_descriptor",
sizeof(PyMethodDescrObject),
0,
(destructor)descr_dealloc, /* tp_dealloc */
offsetof(PyMethodDescrObject, vectorcall), /* tp_vectorcall_offset */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_as_async */
(reprfunc)method_repr, /* tp_repr */
0, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
0, /* tp_hash */
PyVectorcall_Call, /* tp_call */
0, /* tp_str */
PyObject_GenericGetAttr, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
Py_TPFLAGS_HAVE_VECTORCALL |
Py_TPFLAGS_METHOD_DESCRIPTOR, /* tp_flags */
0, /* tp_doc */
descr_traverse, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
descr_methods, /* tp_methods */
descr_members, /* tp_members */
method_getset, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
(descrgetfunc)method_get, /* tp_descr_get */
0, /* tp_descr_set */
};
/* This is for METH_CLASS in C, not for "f = classmethod(f)" in Python! */
PyTypeObject PyClassMethodDescr_Type = {
PyVarObject_HEAD_INIT(&PyType_Type, 0)
"classmethod_descriptor",
sizeof(PyMethodDescrObject),
0,
(destructor)descr_dealloc, /* tp_dealloc */
0, /* tp_vectorcall_offset */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_as_async */
(reprfunc)method_repr, /* tp_repr */
0, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
0, /* tp_hash */
(ternaryfunc)classmethoddescr_call, /* tp_call */
0, /* tp_str */
PyObject_GenericGetAttr, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC, /* tp_flags */
0, /* tp_doc */
descr_traverse, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
descr_methods, /* tp_methods */
descr_members, /* tp_members */
method_getset, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
(descrgetfunc)classmethod_get, /* tp_descr_get */
0, /* tp_descr_set */
};
PyTypeObject PyMemberDescr_Type = {
PyVarObject_HEAD_INIT(&PyType_Type, 0)
"member_descriptor",
sizeof(PyMemberDescrObject),
0,
(destructor)descr_dealloc, /* tp_dealloc */
0, /* tp_vectorcall_offset */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_as_async */
(reprfunc)member_repr, /* tp_repr */
0, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
0, /* tp_hash */
0, /* tp_call */
0, /* tp_str */
PyObject_GenericGetAttr, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC, /* tp_flags */
0, /* tp_doc */
descr_traverse, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
descr_methods, /* tp_methods */
descr_members, /* tp_members */
member_getset, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
(descrgetfunc)member_get, /* tp_descr_get */
(descrsetfunc)member_set, /* tp_descr_set */
};
PyTypeObject PyGetSetDescr_Type = {
PyVarObject_HEAD_INIT(&PyType_Type, 0)
"getset_descriptor",
sizeof(PyGetSetDescrObject),
0,
(destructor)descr_dealloc, /* tp_dealloc */
0, /* tp_vectorcall_offset */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_as_async */
(reprfunc)getset_repr, /* tp_repr */
0, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
0, /* tp_hash */
0, /* tp_call */
0, /* tp_str */
PyObject_GenericGetAttr, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC, /* tp_flags */
0, /* tp_doc */
descr_traverse, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
0, /* tp_methods */
descr_members, /* tp_members */
getset_getset, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
(descrgetfunc)getset_get, /* tp_descr_get */
(descrsetfunc)getset_set, /* tp_descr_set */
};
PyTypeObject PyWrapperDescr_Type = {
PyVarObject_HEAD_INIT(&PyType_Type, 0)
"wrapper_descriptor",
sizeof(PyWrapperDescrObject),
0,
(destructor)descr_dealloc, /* tp_dealloc */
0, /* tp_vectorcall_offset */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_as_async */
(reprfunc)wrapperdescr_repr, /* tp_repr */
0, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
0, /* tp_hash */
(ternaryfunc)wrapperdescr_call, /* tp_call */
0, /* tp_str */
PyObject_GenericGetAttr, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
Py_TPFLAGS_METHOD_DESCRIPTOR, /* tp_flags */
0, /* tp_doc */
descr_traverse, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
descr_methods, /* tp_methods */
descr_members, /* tp_members */
wrapperdescr_getset, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
(descrgetfunc)wrapperdescr_get, /* tp_descr_get */
0, /* tp_descr_set */
};
static PyDescrObject *
descr_new(PyTypeObject *descrtype, PyTypeObject *type, const char *name)
{
PyDescrObject *descr;
descr = (PyDescrObject *)PyType_GenericAlloc(descrtype, 0);
if (descr != NULL) {
Py_XINCREF(type);
descr->d_type = type;
descr->d_name = PyUnicode_InternFromString(name);
if (descr->d_name == NULL) {
Py_DECREF(descr);
descr = NULL;
}
else {
descr->d_qualname = NULL;
}
}
return descr;
}
PyObject *
PyDescr_NewMethod(PyTypeObject *type, PyMethodDef *method)
{
/* Figure out correct vectorcall function to use */
vectorcallfunc vectorcall;
switch (method->ml_flags & (METH_VARARGS | METH_FASTCALL | METH_NOARGS |
METH_O | METH_KEYWORDS | METH_METHOD))
{
case METH_VARARGS:
vectorcall = method_vectorcall_VARARGS;
break;
case METH_VARARGS | METH_KEYWORDS:
vectorcall = method_vectorcall_VARARGS_KEYWORDS;
break;
case METH_FASTCALL:
vectorcall = method_vectorcall_FASTCALL;
break;
case METH_FASTCALL | METH_KEYWORDS:
vectorcall = method_vectorcall_FASTCALL_KEYWORDS;
break;
case METH_NOARGS:
vectorcall = method_vectorcall_NOARGS;
break;
case METH_O:
vectorcall = method_vectorcall_O;
break;
case METH_METHOD | METH_FASTCALL | METH_KEYWORDS:
vectorcall = method_vectorcall_FASTCALL_KEYWORDS_METHOD;
break;
default:
PyErr_Format(PyExc_SystemError,
"%s() method: bad call flags", method->ml_name);
return NULL;
}
PyMethodDescrObject *descr;
descr = (PyMethodDescrObject *)descr_new(&PyMethodDescr_Type,
type, method->ml_name);
if (descr != NULL) {
descr->d_method = method;
descr->vectorcall = vectorcall;
}
return (PyObject *)descr;
}
PyObject *
PyDescr_NewClassMethod(PyTypeObject *type, PyMethodDef *method)
{
PyMethodDescrObject *descr;
descr = (PyMethodDescrObject *)descr_new(&PyClassMethodDescr_Type,
type, method->ml_name);
if (descr != NULL)
descr->d_method = method;
return (PyObject *)descr;
}
PyObject *
PyDescr_NewMember(PyTypeObject *type, PyMemberDef *member)
{
PyMemberDescrObject *descr;
descr = (PyMemberDescrObject *)descr_new(&PyMemberDescr_Type,
type, member->name);
if (descr != NULL)
descr->d_member = member;
return (PyObject *)descr;
}
PyObject *
PyDescr_NewGetSet(PyTypeObject *type, PyGetSetDef *getset)
{
PyGetSetDescrObject *descr;
descr = (PyGetSetDescrObject *)descr_new(&PyGetSetDescr_Type,
type, getset->name);
if (descr != NULL)
descr->d_getset = getset;
return (PyObject *)descr;
}
PyObject *
PyDescr_NewWrapper(PyTypeObject *type, struct wrapperbase *base, void *wrapped)
{
PyWrapperDescrObject *descr;
descr = (PyWrapperDescrObject *)descr_new(&PyWrapperDescr_Type,
type, base->name);
if (descr != NULL) {
descr->d_base = base;
descr->d_wrapped = wrapped;
}
return (PyObject *)descr;
}
int
PyDescr_IsData(PyObject *ob)
{
return Py_TYPE(ob)->tp_descr_set != NULL;