184 lines
4.4 KiB
C
184 lines
4.4 KiB
C
/*
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*
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* ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version. The Blender
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* Foundation also sells licenses for use in proprietary software under
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* the Blender License. See http://www.blender.org/BL/ for information
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* about this.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
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* All rights reserved.
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*
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* The Original Code is: all of this file.
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*
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* Contributor(s): none yet.
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*
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* ***** END GPL/BL DUAL LICENSE BLOCK *****
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$Id$
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This is code to emulate a readonly Dictionary/Class object
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for storage of Constants
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Inserting readonly values:
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PyObject *constants = ConstObject_New();
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insertConst(constants, "item", PyInt_FromInt(CONSTANT));
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...
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Constant values are accessed in python by either:
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c = module.Const.CONSTANT
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or
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c = module.Const['CONSTANT']
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*/
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#include "Python.h"
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#include "BPY_macros.h"
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#include "BPY_constobject.h"
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#define Const_Check(v) ((v)->ob_type == &Const_Type)
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/* ----------------------------------------------------- */
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/* Declarations for objects of type const */
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PyTypeObject Const_Type;
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/* PROTOS */
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static constobject *
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newconstobject()
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{
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constobject *self;
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Const_Type.ob_type = &PyType_Type;
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self = PyObject_NEW(constobject, &Const_Type);
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if (self == NULL)
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return NULL;
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self->dict = PyDict_New();
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return self;
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}
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char ConstObject_doc[] = "Readonly dictionary type\n\n\
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This is used as a container for constants, which can be accessed by two ways:\n\
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\n\
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c = <ConstObject>.<attribute>\n\
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\n\
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or\n\
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c = <ConstObject>['<attribute>']";
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PyObject *ConstObject_New(void)
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{
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return (PyObject *) newconstobject();
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}
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PyObject *const_repr(constobject *self)
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{
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PyObject *repr;
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repr = PyObject_Repr(self->dict);
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return repr;
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}
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static void const_dealloc(PyObject *self) {
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Py_DECREF(((constobject *)self)->dict);
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PyMem_DEL(self);
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}
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static PyObject *
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const_getattr(constobject *self, char *name)
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{
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PyObject *item;
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if (STREQ(name, "__doc__")) {
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return PyString_FromString(ConstObject_doc);
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}
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if (STREQ(name, "__members__")) {
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return PyDict_Keys(self->dict);
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}
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item = PyDict_GetItemString(self->dict, name); /* borrowed ref ! */
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if (item)
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Py_INCREF(item);
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if (!item) {
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PyErr_SetString(PyExc_AttributeError, name);
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}
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return item;
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}
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/* inserts a constant with name into the dictionary self */
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void insertConst(PyObject *self, char *name, PyObject *cnst)
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{
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PyDict_SetItemString(((constobject *)self)->dict, name, cnst);
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}
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/* Code to access const objects as mappings */
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static int
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const_length(constobject *self)
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{
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return 0;
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}
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static PyObject *
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const_subscript(constobject *self, PyObject *key)
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{
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PyObject *item;
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item = PyDict_GetItem(self->dict, key);
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if (item)
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Py_INCREF(item);
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return item;
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}
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static int
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const_ass_sub(constobject *self, PyObject *v, PyObject *w)
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{
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/* no write access */
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return 0;
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}
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static PyMappingMethods const_as_mapping = {
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(inquiry)const_length, /*mp_length*/
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(binaryfunc)const_subscript, /*mp_subscript*/
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(objobjargproc)const_ass_sub, /*mp_ass_subscript*/
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};
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/* -------------------------------------------------------- */
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PyTypeObject Const_Type = {
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PyObject_HEAD_INIT(NULL)
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0, /*ob_size*/
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"const", /*tp_name*/
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sizeof(constobject), /*tp_basicsize*/
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0, /*tp_itemsize*/
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/* methods */
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(destructor) const_dealloc, /*tp_dealloc*/
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(printfunc) 0, /*tp_print*/
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(getattrfunc) const_getattr, /*tp_getattr*/
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(setattrfunc) 0, /*tp_setattr*/
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(cmpfunc) 0, /*tp_compare*/
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(reprfunc) const_repr, /*tp_repr*/
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0, /*tp_as_number*/
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0, /*tp_as_sequence*/
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&const_as_mapping, /*tp_as_mapping*/
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0, /*tp_hash*/
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};
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