Inada Naoki | c88fece | 2019-04-13 10:46:21 +0900 | [diff] [blame^] | 1 | #define PY_SSIZE_T_CLEAN |
Antoine Pitrou | 1d80a56 | 2018-04-07 18:14:03 +0200 | [diff] [blame] | 2 | #include <Python.h> |
| 3 | |
| 4 | typedef struct { |
| 5 | PyListObject list; |
| 6 | int state; |
| 7 | } SubListObject; |
| 8 | |
| 9 | static PyObject * |
| 10 | SubList_increment(SubListObject *self, PyObject *unused) |
| 11 | { |
| 12 | self->state++; |
| 13 | return PyLong_FromLong(self->state); |
| 14 | } |
| 15 | |
| 16 | static PyMethodDef SubList_methods[] = { |
| 17 | {"increment", (PyCFunction) SubList_increment, METH_NOARGS, |
| 18 | PyDoc_STR("increment state counter")}, |
| 19 | {NULL}, |
| 20 | }; |
| 21 | |
| 22 | static int |
| 23 | SubList_init(SubListObject *self, PyObject *args, PyObject *kwds) |
| 24 | { |
| 25 | if (PyList_Type.tp_init((PyObject *) self, args, kwds) < 0) |
| 26 | return -1; |
| 27 | self->state = 0; |
| 28 | return 0; |
| 29 | } |
| 30 | |
| 31 | static PyTypeObject SubListType = { |
| 32 | PyVarObject_HEAD_INIT(NULL, 0) |
| 33 | .tp_name = "sublist.SubList", |
| 34 | .tp_doc = "SubList objects", |
| 35 | .tp_basicsize = sizeof(SubListObject), |
| 36 | .tp_itemsize = 0, |
| 37 | .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, |
| 38 | .tp_init = (initproc) SubList_init, |
| 39 | .tp_methods = SubList_methods, |
| 40 | }; |
| 41 | |
| 42 | static PyModuleDef sublistmodule = { |
| 43 | PyModuleDef_HEAD_INIT, |
| 44 | .m_name = "sublist", |
| 45 | .m_doc = "Example module that creates an extension type.", |
| 46 | .m_size = -1, |
| 47 | }; |
| 48 | |
| 49 | PyMODINIT_FUNC |
| 50 | PyInit_sublist(void) |
| 51 | { |
| 52 | PyObject *m; |
| 53 | SubListType.tp_base = &PyList_Type; |
| 54 | if (PyType_Ready(&SubListType) < 0) |
| 55 | return NULL; |
| 56 | |
| 57 | m = PyModule_Create(&sublistmodule); |
| 58 | if (m == NULL) |
| 59 | return NULL; |
| 60 | |
| 61 | Py_INCREF(&SubListType); |
| 62 | PyModule_AddObject(m, "SubList", (PyObject *) &SubListType); |
| 63 | return m; |
| 64 | } |