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#include <Python.h>
#include "structmember.h"
typedef struct {
PyObject_HEAD
PyObject *first;
PyObject *last;
int number;
} Noddy;
static int
Noddy_traverse(Noddy *self, visitproc visit, void *arg)
{
int vret;
if (self->first) {
vret = visit(self->first, arg);
if (vret != 0)
return vret;
}
if (self->last) {
vret = visit(self->last, arg);
if (vret != 0)
return vret;
}
return 0;
}
static int
Noddy_clear(Noddy *self)
{
PyObject *tmp;
tmp = self->first;
self->first = NULL;
Py_XDECREF(tmp);
tmp = self->last;
self->last = NULL;
Py_XDECREF(tmp);
return 0;
}
static void
Noddy_dealloc(Noddy* self)
{
Noddy_clear(self);
Py_TYPE(self)->tp_free((PyObject*)self);
}
static PyObject *
Noddy_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
{
Noddy *self;
self = (Noddy *)type->tp_alloc(type, 0);
if (self != NULL) {
self->first = PyUnicode_FromString("");
if (self->first == NULL)
{
Py_DECREF(self);
return NULL;
}
self->last = PyUnicode_FromString("");
if (self->last == NULL)
{
Py_DECREF(self);
return NULL;
}
self->number = 0;
}
return (PyObject *)self;
}
static int
Noddy_init(Noddy *self, PyObject *args, PyObject *kwds)
{
PyObject *first=NULL, *last=NULL, *tmp;
static char *kwlist[] = {"first", "last", "number", NULL};
if (! PyArg_ParseTupleAndKeywords(args, kwds, "|OOi", kwlist,
&first, &last,
&self->number))
return -1;
if (first) {
tmp = self->first;
Py_INCREF(first);
self->first = first;
Py_XDECREF(tmp);
}
if (last) {
tmp = self->last;
Py_INCREF(last);
self->last = last;
Py_XDECREF(tmp);
}
return 0;
}
static PyMemberDef Noddy_members[] = {
{"first", T_OBJECT_EX, offsetof(Noddy, first), 0,
"first name"},
{"last", T_OBJECT_EX, offsetof(Noddy, last), 0,
"last name"},
{"number", T_INT, offsetof(Noddy, number), 0,
"noddy number"},
{NULL} /* Sentinel */
};
static PyObject *
Noddy_name(Noddy* self)
{
static PyObject *format = NULL;
PyObject *args, *result;
if (format == NULL) {
format = PyUnicode_FromString("%s %s");
if (format == NULL)
return NULL;
}
if (self->first == NULL) {
PyErr_SetString(PyExc_AttributeError, "first");
return NULL;
}
if (self->last == NULL) {
PyErr_SetString(PyExc_AttributeError, "last");
return NULL;
}
args = Py_BuildValue("OO", self->first, self->last);
if (args == NULL)
return NULL;
result = PyUnicode_Format(format, args);
Py_DECREF(args);
return result;
}
static PyMethodDef Noddy_methods[] = {
{"name", (PyCFunction)Noddy_name, METH_NOARGS,
"Return the name, combining the first and last name"
},
{NULL} /* Sentinel */
};
static PyTypeObject NoddyType = {
PyVarObject_HEAD_INIT(NULL, 0)
"noddy.Noddy", /* tp_name */
sizeof(Noddy), /* tp_basicsize */
0, /* tp_itemsize */
(destructor)Noddy_dealloc, /* tp_dealloc */
0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_reserved */
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 |
Py_TPFLAGS_HAVE_GC, /* tp_flags */
"Noddy objects", /* tp_doc */
(traverseproc)Noddy_traverse, /* tp_traverse */
(inquiry)Noddy_clear, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iternext */
Noddy_methods, /* tp_methods */
Noddy_members, /* tp_members */
0, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
(initproc)Noddy_init, /* tp_init */
0, /* tp_alloc */
Noddy_new, /* tp_new */
};
static PyModuleDef noddy4module = {
PyModuleDef_HEAD_INIT,
"noddy4",
"Example module that creates an extension type.",
-1,
NULL, NULL, NULL, NULL, NULL
};
PyMODINIT_FUNC
PyInit_noddy4(void)
{
PyObject* m;
if (PyType_Ready(&NoddyType) < 0)
return NULL;
m = PyModule_Create(&noddy4module);
if (m == NULL)
return NULL;
Py_INCREF(&NoddyType);
PyModule_AddObject(m, "Noddy", (PyObject *)&NoddyType);
return m;
}
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