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