diff options
Diffstat (limited to 'Doc/includes/noddy4.c')
| -rw-r--r-- | Doc/includes/noddy4.c | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/Doc/includes/noddy4.c b/Doc/includes/noddy4.c new file mode 100644 index 0000000..878e086 --- /dev/null +++ b/Doc/includes/noddy4.c @@ -0,0 +1,224 @@ +#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); + self->ob_type->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 = PyString_FromString(""); + if (self->first == NULL) + { + Py_DECREF(self); + return NULL; + } + + self->last = PyString_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 = PyString_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 = PyString_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 = { + PyObject_HEAD_INIT(NULL) + 0, /*ob_size*/ + "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_compare*/ + 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 PyMethodDef module_methods[] = { + {NULL} /* Sentinel */ +}; + +#ifndef PyMODINIT_FUNC /* declarations for DLL import/export */ +#define PyMODINIT_FUNC void +#endif +PyMODINIT_FUNC +initnoddy4(void) +{ + PyObject* m; + + if (PyType_Ready(&NoddyType) < 0) + return; + + m = Py_InitModule3("noddy4", module_methods, + "Example module that creates an extension type."); + + if (m == NULL) + return; + + Py_INCREF(&NoddyType); + PyModule_AddObject(m, "Noddy", (PyObject *)&NoddyType); +} |