mirror of https://github.com/python/cpython
340 lines
7.5 KiB
C
340 lines
7.5 KiB
C
|
|
/* Method object implementation */
|
|
|
|
#include "Python.h"
|
|
#include "structmember.h"
|
|
|
|
static PyCFunctionObject *free_list = NULL;
|
|
|
|
PyObject *
|
|
PyCFunction_NewEx(PyMethodDef *ml, PyObject *self, PyObject *module)
|
|
{
|
|
PyCFunctionObject *op;
|
|
op = free_list;
|
|
if (op != NULL) {
|
|
free_list = (PyCFunctionObject *)(op->m_self);
|
|
PyObject_INIT(op, &PyCFunction_Type);
|
|
}
|
|
else {
|
|
op = PyObject_GC_New(PyCFunctionObject, &PyCFunction_Type);
|
|
if (op == NULL)
|
|
return NULL;
|
|
}
|
|
op->m_ml = ml;
|
|
Py_XINCREF(self);
|
|
op->m_self = self;
|
|
Py_XINCREF(module);
|
|
op->m_module = module;
|
|
_PyObject_GC_TRACK(op);
|
|
return (PyObject *)op;
|
|
}
|
|
|
|
PyCFunction
|
|
PyCFunction_GetFunction(PyObject *op)
|
|
{
|
|
if (!PyCFunction_Check(op)) {
|
|
PyErr_BadInternalCall();
|
|
return NULL;
|
|
}
|
|
return ((PyCFunctionObject *)op) -> m_ml -> ml_meth;
|
|
}
|
|
|
|
PyObject *
|
|
PyCFunction_GetSelf(PyObject *op)
|
|
{
|
|
if (!PyCFunction_Check(op)) {
|
|
PyErr_BadInternalCall();
|
|
return NULL;
|
|
}
|
|
return ((PyCFunctionObject *)op) -> m_self;
|
|
}
|
|
|
|
int
|
|
PyCFunction_GetFlags(PyObject *op)
|
|
{
|
|
if (!PyCFunction_Check(op)) {
|
|
PyErr_BadInternalCall();
|
|
return -1;
|
|
}
|
|
return ((PyCFunctionObject *)op) -> m_ml -> ml_flags;
|
|
}
|
|
|
|
PyObject *
|
|
PyCFunction_Call(PyObject *func, PyObject *arg, PyObject *kw)
|
|
{
|
|
PyCFunctionObject* f = (PyCFunctionObject*)func;
|
|
PyCFunction meth = PyCFunction_GET_FUNCTION(func);
|
|
PyObject *self = PyCFunction_GET_SELF(func);
|
|
Py_ssize_t size;
|
|
|
|
switch (PyCFunction_GET_FLAGS(func) & ~(METH_CLASS | METH_STATIC | METH_COEXIST)) {
|
|
case METH_VARARGS:
|
|
if (kw == NULL || PyDict_Size(kw) == 0)
|
|
return (*meth)(self, arg);
|
|
break;
|
|
case METH_VARARGS | METH_KEYWORDS:
|
|
case METH_OLDARGS | METH_KEYWORDS:
|
|
return (*(PyCFunctionWithKeywords)meth)(self, arg, kw);
|
|
case METH_NOARGS:
|
|
if (kw == NULL || PyDict_Size(kw) == 0) {
|
|
size = PyTuple_GET_SIZE(arg);
|
|
if (size == 0)
|
|
return (*meth)(self, NULL);
|
|
PyErr_Format(PyExc_TypeError,
|
|
"%.200s() takes no arguments (%zd given)",
|
|
f->m_ml->ml_name, size);
|
|
return NULL;
|
|
}
|
|
break;
|
|
case METH_O:
|
|
if (kw == NULL || PyDict_Size(kw) == 0) {
|
|
size = PyTuple_GET_SIZE(arg);
|
|
if (size == 1)
|
|
return (*meth)(self, PyTuple_GET_ITEM(arg, 0));
|
|
PyErr_Format(PyExc_TypeError,
|
|
"%.200s() takes exactly one argument (%zd given)",
|
|
f->m_ml->ml_name, size);
|
|
return NULL;
|
|
}
|
|
break;
|
|
case METH_OLDARGS:
|
|
/* the really old style */
|
|
if (kw == NULL || PyDict_Size(kw) == 0) {
|
|
size = PyTuple_GET_SIZE(arg);
|
|
if (size == 1)
|
|
arg = PyTuple_GET_ITEM(arg, 0);
|
|
else if (size == 0)
|
|
arg = NULL;
|
|
return (*meth)(self, arg);
|
|
}
|
|
break;
|
|
default:
|
|
PyErr_BadInternalCall();
|
|
return NULL;
|
|
}
|
|
PyErr_Format(PyExc_TypeError, "%.200s() takes no keyword arguments",
|
|
f->m_ml->ml_name);
|
|
return NULL;
|
|
}
|
|
|
|
/* Methods (the standard built-in methods, that is) */
|
|
|
|
static void
|
|
meth_dealloc(PyCFunctionObject *m)
|
|
{
|
|
_PyObject_GC_UNTRACK(m);
|
|
Py_XDECREF(m->m_self);
|
|
Py_XDECREF(m->m_module);
|
|
m->m_self = (PyObject *)free_list;
|
|
free_list = m;
|
|
}
|
|
|
|
static PyObject *
|
|
meth_get__doc__(PyCFunctionObject *m, void *closure)
|
|
{
|
|
const char *doc = m->m_ml->ml_doc;
|
|
|
|
if (doc != NULL)
|
|
return PyString_FromString(doc);
|
|
Py_INCREF(Py_None);
|
|
return Py_None;
|
|
}
|
|
|
|
static PyObject *
|
|
meth_get__name__(PyCFunctionObject *m, void *closure)
|
|
{
|
|
return PyUnicode_FromString(m->m_ml->ml_name);
|
|
}
|
|
|
|
static int
|
|
meth_traverse(PyCFunctionObject *m, visitproc visit, void *arg)
|
|
{
|
|
Py_VISIT(m->m_self);
|
|
Py_VISIT(m->m_module);
|
|
return 0;
|
|
}
|
|
|
|
static PyObject *
|
|
meth_get__self__(PyCFunctionObject *m, void *closure)
|
|
{
|
|
PyObject *self;
|
|
|
|
self = m->m_self;
|
|
if (self == NULL)
|
|
self = Py_None;
|
|
Py_INCREF(self);
|
|
return self;
|
|
}
|
|
|
|
static PyGetSetDef meth_getsets [] = {
|
|
{"__doc__", (getter)meth_get__doc__, NULL, NULL},
|
|
{"__name__", (getter)meth_get__name__, NULL, NULL},
|
|
{"__self__", (getter)meth_get__self__, NULL, NULL},
|
|
{0}
|
|
};
|
|
|
|
#define OFF(x) offsetof(PyCFunctionObject, x)
|
|
|
|
static PyMemberDef meth_members[] = {
|
|
{"__module__", T_OBJECT, OFF(m_module), WRITE_RESTRICTED},
|
|
{NULL}
|
|
};
|
|
|
|
static PyObject *
|
|
meth_repr(PyCFunctionObject *m)
|
|
{
|
|
if (m->m_self == NULL)
|
|
return PyUnicode_FromFormat("<built-in function %s>",
|
|
m->m_ml->ml_name);
|
|
return PyUnicode_FromFormat("<built-in method %s of %s object at %p>",
|
|
m->m_ml->ml_name,
|
|
m->m_self->ob_type->tp_name,
|
|
m->m_self);
|
|
}
|
|
|
|
static PyObject *
|
|
meth_richcompare(PyObject *self, PyObject *other, int op)
|
|
{
|
|
PyCFunctionObject *a, *b;
|
|
PyObject *res;
|
|
int eq;
|
|
|
|
if ((op != Py_EQ && op != Py_NE) ||
|
|
!PyCFunction_Check(self) ||
|
|
!PyCFunction_Check(other))
|
|
{
|
|
Py_INCREF(Py_NotImplemented);
|
|
return Py_NotImplemented;
|
|
}
|
|
a = (PyCFunctionObject *)self;
|
|
b = (PyCFunctionObject *)other;
|
|
eq = a->m_self == b->m_self;
|
|
if (eq)
|
|
eq = a->m_ml->ml_meth == b->m_ml->ml_meth;
|
|
if (op == Py_EQ)
|
|
res = eq ? Py_True : Py_False;
|
|
else
|
|
res = eq ? Py_False : Py_True;
|
|
Py_INCREF(res);
|
|
return res;
|
|
}
|
|
|
|
static long
|
|
meth_hash(PyCFunctionObject *a)
|
|
{
|
|
long x,y;
|
|
if (a->m_self == NULL)
|
|
x = 0;
|
|
else {
|
|
x = PyObject_Hash(a->m_self);
|
|
if (x == -1)
|
|
return -1;
|
|
}
|
|
y = _Py_HashPointer((void*)(a->m_ml->ml_meth));
|
|
if (y == -1)
|
|
return -1;
|
|
x ^= y;
|
|
if (x == -1)
|
|
x = -2;
|
|
return x;
|
|
}
|
|
|
|
|
|
PyTypeObject PyCFunction_Type = {
|
|
PyVarObject_HEAD_INIT(&PyType_Type, 0)
|
|
"builtin_function_or_method",
|
|
sizeof(PyCFunctionObject),
|
|
0,
|
|
(destructor)meth_dealloc, /* tp_dealloc */
|
|
0, /* tp_print */
|
|
0, /* tp_getattr */
|
|
0, /* tp_setattr */
|
|
0, /* tp_compare */
|
|
(reprfunc)meth_repr, /* tp_repr */
|
|
0, /* tp_as_number */
|
|
0, /* tp_as_sequence */
|
|
0, /* tp_as_mapping */
|
|
(hashfunc)meth_hash, /* tp_hash */
|
|
PyCFunction_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 */
|
|
(traverseproc)meth_traverse, /* tp_traverse */
|
|
0, /* tp_clear */
|
|
meth_richcompare, /* tp_richcompare */
|
|
0, /* tp_weaklistoffset */
|
|
0, /* tp_iter */
|
|
0, /* tp_iternext */
|
|
0, /* tp_methods */
|
|
meth_members, /* tp_members */
|
|
meth_getsets, /* tp_getset */
|
|
0, /* tp_base */
|
|
0, /* tp_dict */
|
|
};
|
|
|
|
/* Find a method in a method chain */
|
|
|
|
PyObject *
|
|
Py_FindMethodInChain(PyMethodChain *chain, PyObject *self, const char *name)
|
|
{
|
|
if (name[0] == '_' && name[1] == '_') {
|
|
if (strcmp(name, "__doc__") == 0) {
|
|
const char *doc = self->ob_type->tp_doc;
|
|
if (doc != NULL)
|
|
return PyString_FromString(doc);
|
|
}
|
|
}
|
|
while (chain != NULL) {
|
|
PyMethodDef *ml = chain->methods;
|
|
for (; ml->ml_name != NULL; ml++) {
|
|
if (name[0] == ml->ml_name[0] &&
|
|
strcmp(name+1, ml->ml_name+1) == 0)
|
|
/* XXX */
|
|
return PyCFunction_New(ml, self);
|
|
}
|
|
chain = chain->link;
|
|
}
|
|
PyErr_SetString(PyExc_AttributeError, name);
|
|
return NULL;
|
|
}
|
|
|
|
/* Find a method in a single method list */
|
|
|
|
PyObject *
|
|
Py_FindMethod(PyMethodDef *methods, PyObject *self, const char *name)
|
|
{
|
|
PyMethodChain chain;
|
|
chain.methods = methods;
|
|
chain.link = NULL;
|
|
return Py_FindMethodInChain(&chain, self, name);
|
|
}
|
|
|
|
/* Clear out the free list */
|
|
|
|
void
|
|
PyCFunction_Fini(void)
|
|
{
|
|
while (free_list) {
|
|
PyCFunctionObject *v = free_list;
|
|
free_list = (PyCFunctionObject *)(v->m_self);
|
|
PyObject_GC_Del(v);
|
|
}
|
|
}
|
|
|
|
/* PyCFunction_New() is now just a macro that calls PyCFunction_NewEx(),
|
|
but it's part of the API so we need to keep a function around that
|
|
existing C extensions can call.
|
|
*/
|
|
|
|
#undef PyCFunction_New
|
|
PyAPI_FUNC(PyObject *) PyCFunction_New(PyMethodDef *, PyObject *);
|
|
|
|
PyObject *
|
|
PyCFunction_New(PyMethodDef *ml, PyObject *self)
|
|
{
|
|
return PyCFunction_NewEx(ml, self, NULL);
|
|
}
|