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 | #include "structmember.h" |
| 4 | |
| 5 | typedef struct { |
| 6 | PyObject_HEAD |
| 7 | PyObject *first; /* first name */ |
| 8 | PyObject *last; /* last name */ |
| 9 | int number; |
| 10 | } CustomObject; |
| 11 | |
| 12 | static void |
| 13 | Custom_dealloc(CustomObject *self) |
| 14 | { |
| 15 | Py_XDECREF(self->first); |
| 16 | Py_XDECREF(self->last); |
| 17 | Py_TYPE(self)->tp_free((PyObject *) self); |
| 18 | } |
| 19 | |
| 20 | static PyObject * |
| 21 | Custom_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 22 | { |
| 23 | CustomObject *self; |
| 24 | self = (CustomObject *) type->tp_alloc(type, 0); |
| 25 | if (self != NULL) { |
| 26 | self->first = PyUnicode_FromString(""); |
| 27 | if (self->first == NULL) { |
| 28 | Py_DECREF(self); |
| 29 | return NULL; |
| 30 | } |
| 31 | self->last = PyUnicode_FromString(""); |
| 32 | if (self->last == NULL) { |
| 33 | Py_DECREF(self); |
| 34 | return NULL; |
| 35 | } |
| 36 | self->number = 0; |
| 37 | } |
| 38 | return (PyObject *) self; |
| 39 | } |
| 40 | |
| 41 | static int |
| 42 | Custom_init(CustomObject *self, PyObject *args, PyObject *kwds) |
| 43 | { |
| 44 | static char *kwlist[] = {"first", "last", "number", NULL}; |
| 45 | PyObject *first = NULL, *last = NULL, *tmp; |
| 46 | |
| 47 | if (!PyArg_ParseTupleAndKeywords(args, kwds, "|OOi", kwlist, |
| 48 | &first, &last, |
| 49 | &self->number)) |
| 50 | return -1; |
| 51 | |
| 52 | if (first) { |
| 53 | tmp = self->first; |
| 54 | Py_INCREF(first); |
| 55 | self->first = first; |
| 56 | Py_XDECREF(tmp); |
| 57 | } |
| 58 | if (last) { |
| 59 | tmp = self->last; |
| 60 | Py_INCREF(last); |
| 61 | self->last = last; |
| 62 | Py_XDECREF(tmp); |
| 63 | } |
| 64 | return 0; |
| 65 | } |
| 66 | |
| 67 | static PyMemberDef Custom_members[] = { |
| 68 | {"first", T_OBJECT_EX, offsetof(CustomObject, first), 0, |
| 69 | "first name"}, |
| 70 | {"last", T_OBJECT_EX, offsetof(CustomObject, last), 0, |
| 71 | "last name"}, |
| 72 | {"number", T_INT, offsetof(CustomObject, number), 0, |
| 73 | "custom number"}, |
| 74 | {NULL} /* Sentinel */ |
| 75 | }; |
| 76 | |
| 77 | static PyObject * |
| 78 | Custom_name(CustomObject *self, PyObject *Py_UNUSED(ignored)) |
| 79 | { |
| 80 | if (self->first == NULL) { |
| 81 | PyErr_SetString(PyExc_AttributeError, "first"); |
| 82 | return NULL; |
| 83 | } |
| 84 | if (self->last == NULL) { |
| 85 | PyErr_SetString(PyExc_AttributeError, "last"); |
| 86 | return NULL; |
| 87 | } |
| 88 | return PyUnicode_FromFormat("%S %S", self->first, self->last); |
| 89 | } |
| 90 | |
| 91 | static PyMethodDef Custom_methods[] = { |
| 92 | {"name", (PyCFunction) Custom_name, METH_NOARGS, |
| 93 | "Return the name, combining the first and last name" |
| 94 | }, |
| 95 | {NULL} /* Sentinel */ |
| 96 | }; |
| 97 | |
| 98 | static PyTypeObject CustomType = { |
| 99 | PyVarObject_HEAD_INIT(NULL, 0) |
| 100 | .tp_name = "custom2.Custom", |
| 101 | .tp_doc = "Custom objects", |
| 102 | .tp_basicsize = sizeof(CustomObject), |
| 103 | .tp_itemsize = 0, |
| 104 | .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, |
| 105 | .tp_new = Custom_new, |
| 106 | .tp_init = (initproc) Custom_init, |
| 107 | .tp_dealloc = (destructor) Custom_dealloc, |
| 108 | .tp_members = Custom_members, |
| 109 | .tp_methods = Custom_methods, |
| 110 | }; |
| 111 | |
| 112 | static PyModuleDef custommodule = { |
| 113 | PyModuleDef_HEAD_INIT, |
| 114 | .m_name = "custom2", |
| 115 | .m_doc = "Example module that creates an extension type.", |
| 116 | .m_size = -1, |
| 117 | }; |
| 118 | |
| 119 | PyMODINIT_FUNC |
| 120 | PyInit_custom2(void) |
| 121 | { |
| 122 | PyObject *m; |
| 123 | if (PyType_Ready(&CustomType) < 0) |
| 124 | return NULL; |
| 125 | |
| 126 | m = PyModule_Create(&custommodule); |
| 127 | if (m == NULL) |
| 128 | return NULL; |
| 129 | |
| 130 | Py_INCREF(&CustomType); |
| 131 | PyModule_AddObject(m, "Custom", (PyObject *) &CustomType); |
| 132 | return m; |
| 133 | } |