mirror of https://github.com/python/cpython
141 lines
3.5 KiB
C
141 lines
3.5 KiB
C
/***********************************************************
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Copyright 1991, 1992, 1993 by Stichting Mathematisch Centrum,
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Amsterdam, The Netherlands.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the names of Stichting Mathematisch
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Centrum or CWI not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior permission.
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STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
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THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
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FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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******************************************************************/
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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 "allobjects.h"
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#include "modsupport.h" /* For getargs() etc. */
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typedef struct {
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OB_HEAD
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object *x_attr; /* Attributes dictionary */
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} xxobject;
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extern typeobject Xxtype; /* Really static, forward */
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#define is_xxobject(v) ((v)->ob_type == &Xxtype)
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static xxobject *
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newxxobject(arg)
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object *arg;
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{
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xxobject *xp;
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xp = NEWOBJ(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(xp)
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xxobject *xp;
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{
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XDECREF(xp->x_attr);
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DEL(xp);
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}
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static object *
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xx_demo(self, args)
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xxobject *self;
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object *args;
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{
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if (!getnoarg(args))
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return NULL;
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INCREF(None);
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return None;
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}
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static struct methodlist xx_methods[] = {
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{"demo", xx_demo},
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{NULL, NULL} /* sentinel */
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};
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static object *
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xx_getattr(xp, name)
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xxobject *xp;
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char *name;
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{
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if (xp->x_attr != NULL) {
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object *v = dictlookup(xp->x_attr, name);
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if (v != NULL) {
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INCREF(v);
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return v;
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}
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}
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return findmethod(xx_methods, (object *)xp, name);
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}
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static int
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xx_setattr(xp, name, v)
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xxobject *xp;
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char *name;
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object *v;
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{
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if (xp->x_attr == NULL) {
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xp->x_attr = newdictobject();
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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 = dictremove(xp->x_attr, name);
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if (rv < 0)
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err_setstr(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 dictinsert(xp->x_attr, name, v);
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}
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static typeobject Xxtype = {
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OB_HEAD_INIT(&Typetype)
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0, /*ob_size*/
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"xx", /*tp_name*/
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sizeof(xxobject), /*tp_size*/
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0, /*tp_itemsize*/
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/* methods */
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xx_dealloc, /*tp_dealloc*/
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0, /*tp_print*/
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xx_getattr, /*tp_getattr*/
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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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};
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