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#include "Python.h"
#include "structmember.h"
/* Examples showing how to subtype the builtin list and dict types from C. */
/* spamlist -- a list subtype */
typedef struct {
PyListObject list;
int state;
} spamlistobject;
static PyObject *
spamlist_getstate(spamlistobject *self, PyObject *args)
{
if (!PyArg_ParseTuple(args, ":getstate"))
return NULL;
return PyInt_FromLong(self->state);
}
static PyObject *
spamlist_setstate(spamlistobject *self, PyObject *args)
{
int state;
if (!PyArg_ParseTuple(args, "i:setstate", &state))
return NULL;
self->state = state;
Py_INCREF(Py_None);
return Py_None;
}
static PyMethodDef spamlist_methods[] = {
{"getstate", (PyCFunction)spamlist_getstate, METH_VARARGS,
"getstate() -> state"},
{"setstate", (PyCFunction)spamlist_setstate, METH_VARARGS,
"setstate(state)"},
{NULL, NULL},
};
staticforward PyTypeObject spamlist_type;
static int
spamlist_init(spamlistobject *self, PyObject *args, PyObject *kwds)
{
if (PyList_Type.tp_init((PyObject *)self, args, kwds) < 0)
return -1;
self->state = 0;
return 0;
}
static PyObject *
spamlist_state_get(spamlistobject *self)
{
return PyInt_FromLong(self->state);
}
static struct getsetlist spamlist_getsets[] = {
{"state", (getter)spamlist_state_get, NULL, NULL},
{0}
};
static PyTypeObject spamlist_type = {
PyObject_HEAD_INIT(&PyType_Type)
0,
"xxsubtype.spamlist",
sizeof(spamlistobject),
0,
0, /* tp_dealloc */
0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_compare */
0, /* tp_repr */
0, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
0, /* tp_hash */
0, /* tp_call */
0, /* tp_str */
0, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */
0, /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
spamlist_methods, /* tp_methods */
0, /* tp_members */
spamlist_getsets, /* tp_getset */
&PyList_Type, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
(initproc)spamlist_init, /* tp_init */
0, /* tp_alloc */
0, /* tp_new */
};
/* spamdict -- a dict subtype */
typedef struct {
PyDictObject dict;
int state;
} spamdictobject;
static PyObject *
spamdict_getstate(spamdictobject *self, PyObject *args)
{
if (!PyArg_ParseTuple(args, ":getstate"))
return NULL;
return PyInt_FromLong(self->state);
}
static PyObject *
spamdict_setstate(spamdictobject *self, PyObject *args)
{
int state;
if (!PyArg_ParseTuple(args, "i:setstate", &state))
return NULL;
self->state = state;
Py_INCREF(Py_None);
return Py_None;
}
static PyMethodDef spamdict_methods[] = {
{"getstate", (PyCFunction)spamdict_getstate, METH_VARARGS,
"getstate() -> state"},
{"setstate", (PyCFunction)spamdict_setstate, METH_VARARGS,
"setstate(state)"},
{NULL, NULL},
};
staticforward PyTypeObject spamdict_type;
static int
spamdict_init(spamdictobject *self, PyObject *args, PyObject *kwds)
{
if (PyDict_Type.tp_init((PyObject *)self, args, kwds) < 0)
return -1;
self->state = 0;
return 0;
}
static struct memberlist spamdict_members[] = {
{"state", T_INT, offsetof(spamdictobject, state), READONLY},
{0}
};
static PyTypeObject spamdict_type = {
PyObject_HEAD_INIT(&PyType_Type)
0,
"xxsubtype.spamdict",
sizeof(spamdictobject),
0,
0, /* tp_dealloc */
0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_compare */
0, /* tp_repr */
0, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
0, /* tp_hash */
0, /* tp_call */
0, /* tp_str */
0, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */
0, /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
spamdict_methods, /* tp_methods */
spamdict_members, /* tp_members */
0, /* tp_getset */
&PyDict_Type, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
(initproc)spamdict_init, /* tp_init */
0, /* tp_alloc */
0, /* tp_new */
};
PyObject *
spam_bench(PyObject *self, PyObject *args)
{
PyObject *obj, *name, *res;
int n = 1000;
time_t t0, t1;
if (!PyArg_ParseTuple(args, "OS|i", &obj, &name, &n))
return NULL;
t0 = clock();
while (--n >= 0) {
res = PyObject_GetAttr(obj, name);
if (res == NULL)
return NULL;
Py_DECREF(res);
}
t1 = clock();
return PyFloat_FromDouble((double)(t1-t0) / CLOCKS_PER_SEC);
}
static PyMethodDef xxsubtype_functions[] = {
{"bench", spam_bench, METH_VARARGS},
{NULL, NULL} /* sentinel */
};
DL_EXPORT(void)
initxxsubtype(void)
{
PyObject *m, *d;
m = Py_InitModule("xxsubtype", xxsubtype_functions);
if (m == NULL)
return;
if (PyType_Ready(&spamlist_type) < 0)
return;
if (PyType_Ready(&spamdict_type) < 0)
return;
d = PyModule_GetDict(m);
if (d == NULL)
return;
Py_INCREF(&spamlist_type);
if (PyDict_SetItemString(d, "spamlist",
(PyObject *) &spamlist_type) < 0)
return;
Py_INCREF(&spamdict_type);
if (PyDict_SetItemString(d, "spamdict",
(PyObject *) &spamdict_type) < 0)
return;
}
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