mirror of https://github.com/python/cpython.git
109 lines
2.4 KiB
C
109 lines
2.4 KiB
C
|
|
/* Use this file as a template to start implementing a new object type.
|
|
If your objects will be called foobar, start by copying this file to
|
|
foobarobject.c, changing all occurrences of xx to foobar and all
|
|
occurrences of Xx by Foobar. You will probably want to delete all
|
|
references to 'x_attr' and add your own types of attributes
|
|
instead. Maybe you want to name your local variables other than
|
|
'xp'. If your object type is needed in other files, you'll have to
|
|
create a file "foobarobject.h"; see intobject.h for an example. */
|
|
|
|
|
|
/* Xx objects */
|
|
|
|
#include "Python.h"
|
|
|
|
typedef struct {
|
|
PyObject_HEAD
|
|
PyObject *x_attr; /* Attributes dictionary */
|
|
} xxobject;
|
|
|
|
staticforward PyTypeObject Xxtype;
|
|
|
|
#define is_xxobject(v) ((v)->ob_type == &Xxtype)
|
|
|
|
static xxobject *
|
|
newxxobject(PyObject *arg)
|
|
{
|
|
xxobject *xp;
|
|
xp = PyObject_New(xxobject, &Xxtype);
|
|
if (xp == NULL)
|
|
return NULL;
|
|
xp->x_attr = NULL;
|
|
return xp;
|
|
}
|
|
|
|
/* Xx methods */
|
|
|
|
static void
|
|
xx_dealloc(xxobject *xp)
|
|
{
|
|
Py_XDECREF(xp->x_attr);
|
|
PyObject_Del(xp);
|
|
}
|
|
|
|
static PyObject *
|
|
xx_demo(xxobject *self, PyObject *args)
|
|
{
|
|
if (!PyArg_ParseTuple(args, ":demo"))
|
|
return NULL;
|
|
Py_INCREF(Py_None);
|
|
return Py_None;
|
|
}
|
|
|
|
static PyMethodDef xx_methods[] = {
|
|
{"demo", (PyCFunction)xx_demo, METH_VARARGS},
|
|
{NULL, NULL} /* sentinel */
|
|
};
|
|
|
|
static PyObject *
|
|
xx_getattr(xxobject *xp, char *name)
|
|
{
|
|
if (xp->x_attr != NULL) {
|
|
PyObject *v = PyDict_GetItemString(xp->x_attr, name);
|
|
if (v != NULL) {
|
|
Py_INCREF(v);
|
|
return v;
|
|
}
|
|
}
|
|
return Py_FindMethod(xx_methods, (PyObject *)xp, name);
|
|
}
|
|
|
|
static int
|
|
xx_setattr(xxobject *xp, char *name, PyObject *v)
|
|
{
|
|
if (xp->x_attr == NULL) {
|
|
xp->x_attr = PyDict_New();
|
|
if (xp->x_attr == NULL)
|
|
return -1;
|
|
}
|
|
if (v == NULL) {
|
|
int rv = PyDict_DelItemString(xp->x_attr, name);
|
|
if (rv < 0)
|
|
PyErr_SetString(PyExc_AttributeError,
|
|
"delete non-existing xx attribute");
|
|
return rv;
|
|
}
|
|
else
|
|
return PyDict_SetItemString(xp->x_attr, name, v);
|
|
}
|
|
|
|
static PyTypeObject Xxtype = {
|
|
PyObject_HEAD_INIT(&PyType_Type)
|
|
0, /*ob_size*/
|
|
"xx", /*tp_name*/
|
|
sizeof(xxobject), /*tp_basicsize*/
|
|
0, /*tp_itemsize*/
|
|
/* methods */
|
|
(destructor)xx_dealloc, /*tp_dealloc*/
|
|
0, /*tp_print*/
|
|
(getattrfunc)xx_getattr, /*tp_getattr*/
|
|
(setattrfunc)xx_setattr, /*tp_setattr*/
|
|
0, /*tp_compare*/
|
|
0, /*tp_repr*/
|
|
0, /*tp_as_number*/
|
|
0, /*tp_as_sequence*/
|
|
0, /*tp_as_mapping*/
|
|
0, /*tp_hash*/
|
|
};
|