PageRenderTime 264ms CodeModel.GetById 140ms app.highlight 16ms RepoModel.GetById 105ms app.codeStats 0ms

/Doc/includes/noddy3.c

http://unladen-swallow.googlecode.com/
C | 243 lines | 205 code | 38 blank | 0 comment | 24 complexity | ea2affacd1a3ad58a408a32300946c4a MD5 | raw file
  1#include <Python.h>
  2#include "structmember.h"
  3
  4typedef struct {
  5    PyObject_HEAD
  6    PyObject *first;
  7    PyObject *last;
  8    int number;
  9} Noddy;
 10
 11static void
 12Noddy_dealloc(Noddy* self)
 13{
 14    Py_XDECREF(self->first);
 15    Py_XDECREF(self->last);
 16    self->ob_type->tp_free((PyObject*)self);
 17}
 18
 19static PyObject *
 20Noddy_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
 21{
 22    Noddy *self;
 23
 24    self = (Noddy *)type->tp_alloc(type, 0);
 25    if (self != NULL) {
 26        self->first = PyString_FromString("");
 27        if (self->first == NULL)
 28          {
 29            Py_DECREF(self);
 30            return NULL;
 31          }
 32        
 33        self->last = PyString_FromString("");
 34        if (self->last == NULL)
 35          {
 36            Py_DECREF(self);
 37            return NULL;
 38          }
 39
 40        self->number = 0;
 41    }
 42
 43    return (PyObject *)self;
 44}
 45
 46static int
 47Noddy_init(Noddy *self, PyObject *args, PyObject *kwds)
 48{
 49    PyObject *first=NULL, *last=NULL, *tmp;
 50
 51    static char *kwlist[] = {"first", "last", "number", NULL};
 52
 53    if (! PyArg_ParseTupleAndKeywords(args, kwds, "|SSi", kwlist, 
 54                                      &first, &last, 
 55                                      &self->number))
 56        return -1; 
 57
 58    if (first) {
 59        tmp = self->first;
 60        Py_INCREF(first);
 61        self->first = first;
 62        Py_DECREF(tmp);
 63    }
 64
 65    if (last) {
 66        tmp = self->last;
 67        Py_INCREF(last);
 68        self->last = last;
 69        Py_DECREF(tmp);
 70    }
 71
 72    return 0;
 73}
 74
 75static PyMemberDef Noddy_members[] = {
 76    {"number", T_INT, offsetof(Noddy, number), 0,
 77     "noddy number"},
 78    {NULL}  /* Sentinel */
 79};
 80
 81static PyObject *
 82Noddy_getfirst(Noddy *self, void *closure)
 83{
 84    Py_INCREF(self->first);
 85    return self->first;
 86}
 87
 88static int
 89Noddy_setfirst(Noddy *self, PyObject *value, void *closure)
 90{
 91  if (value == NULL) {
 92    PyErr_SetString(PyExc_TypeError, "Cannot delete the first attribute");
 93    return -1;
 94  }
 95  
 96  if (! PyString_Check(value)) {
 97    PyErr_SetString(PyExc_TypeError, 
 98                    "The first attribute value must be a string");
 99    return -1;
100  }
101      
102  Py_DECREF(self->first);
103  Py_INCREF(value);
104  self->first = value;    
105
106  return 0;
107}
108
109static PyObject *
110Noddy_getlast(Noddy *self, void *closure)
111{
112    Py_INCREF(self->last);
113    return self->last;
114}
115
116static int
117Noddy_setlast(Noddy *self, PyObject *value, void *closure)
118{
119  if (value == NULL) {
120    PyErr_SetString(PyExc_TypeError, "Cannot delete the last attribute");
121    return -1;
122  }
123  
124  if (! PyString_Check(value)) {
125    PyErr_SetString(PyExc_TypeError, 
126                    "The last attribute value must be a string");
127    return -1;
128  }
129      
130  Py_DECREF(self->last);
131  Py_INCREF(value);
132  self->last = value;    
133
134  return 0;
135}
136
137static PyGetSetDef Noddy_getseters[] = {
138    {"first", 
139     (getter)Noddy_getfirst, (setter)Noddy_setfirst,
140     "first name",
141     NULL},
142    {"last", 
143     (getter)Noddy_getlast, (setter)Noddy_setlast,
144     "last name",
145     NULL},
146    {NULL}  /* Sentinel */
147};
148
149static PyObject *
150Noddy_name(Noddy* self)
151{
152    static PyObject *format = NULL;
153    PyObject *args, *result;
154
155    if (format == NULL) {
156        format = PyString_FromString("%s %s");
157        if (format == NULL)
158            return NULL;
159    }
160
161    args = Py_BuildValue("OO", self->first, self->last);
162    if (args == NULL)
163        return NULL;
164
165    result = PyString_Format(format, args);
166    Py_DECREF(args);
167    
168    return result;
169}
170
171static PyMethodDef Noddy_methods[] = {
172    {"name", (PyCFunction)Noddy_name, METH_NOARGS,
173     "Return the name, combining the first and last name"
174    },
175    {NULL}  /* Sentinel */
176};
177
178static PyTypeObject NoddyType = {
179    PyObject_HEAD_INIT(NULL)
180    0,                         /*ob_size*/
181    "noddy.Noddy",             /*tp_name*/
182    sizeof(Noddy),             /*tp_basicsize*/
183    0,                         /*tp_itemsize*/
184    (destructor)Noddy_dealloc, /*tp_dealloc*/
185    0,                         /*tp_print*/
186    0,                         /*tp_getattr*/
187    0,                         /*tp_setattr*/
188    0,                         /*tp_compare*/
189    0,                         /*tp_repr*/
190    0,                         /*tp_as_number*/
191    0,                         /*tp_as_sequence*/
192    0,                         /*tp_as_mapping*/
193    0,                         /*tp_hash */
194    0,                         /*tp_call*/
195    0,                         /*tp_str*/
196    0,                         /*tp_getattro*/
197    0,                         /*tp_setattro*/
198    0,                         /*tp_as_buffer*/
199    Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/
200    "Noddy objects",           /* tp_doc */
201    0,		               /* tp_traverse */
202    0,		               /* tp_clear */
203    0,		               /* tp_richcompare */
204    0,		               /* tp_weaklistoffset */
205    0,		               /* tp_iter */
206    0,		               /* tp_iternext */
207    Noddy_methods,             /* tp_methods */
208    Noddy_members,             /* tp_members */
209    Noddy_getseters,           /* tp_getset */
210    0,                         /* tp_base */
211    0,                         /* tp_dict */
212    0,                         /* tp_descr_get */
213    0,                         /* tp_descr_set */
214    0,                         /* tp_dictoffset */
215    (initproc)Noddy_init,      /* tp_init */
216    0,                         /* tp_alloc */
217    Noddy_new,                 /* tp_new */
218};
219
220static PyMethodDef module_methods[] = {
221    {NULL}  /* Sentinel */
222};
223
224#ifndef PyMODINIT_FUNC	/* declarations for DLL import/export */
225#define PyMODINIT_FUNC void
226#endif
227PyMODINIT_FUNC
228initnoddy3(void) 
229{
230    PyObject* m;
231
232    if (PyType_Ready(&NoddyType) < 0)
233        return;
234
235    m = Py_InitModule3("noddy3", module_methods,
236                       "Example module that creates an extension type.");
237
238    if (m == NULL)
239      return;
240
241    Py_INCREF(&NoddyType);
242    PyModule_AddObject(m, "Noddy", (PyObject *)&NoddyType);
243}