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Diffstat (limited to 'source/blender/bpython/intern/BPY_constobject.c')
| -rw-r--r-- | source/blender/bpython/intern/BPY_constobject.c | 183 |
1 files changed, 183 insertions, 0 deletions
diff --git a/source/blender/bpython/intern/BPY_constobject.c b/source/blender/bpython/intern/BPY_constobject.c new file mode 100644 index 00000000000..9f1a6b4cc3b --- /dev/null +++ b/source/blender/bpython/intern/BPY_constobject.c @@ -0,0 +1,183 @@ +/* + * + * ***** BEGIN GPL/BL DUAL LICENSE BLOCK ***** + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. The Blender + * Foundation also sells licenses for use in proprietary software under + * the Blender License. See http://www.blender.org/BL/ for information + * about this. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV. + * All rights reserved. + * + * The Original Code is: all of this file. + * + * Contributor(s): none yet. + * + * ***** END GPL/BL DUAL LICENSE BLOCK ***** +$Id$ + +This is code to emulate a readonly Dictionary/Class object +for storage of Constants + +Inserting readonly values: + +PyObject *constants = ConstObject_New(); +insertConst(constants, "item", PyInt_FromInt(CONSTANT)); +... + + +Constant values are accessed in python by either: + +c = module.Const.CONSTANT + + or + +c = module.Const['CONSTANT'] + +*/ + +#include "Python.h" +#include "BPY_macros.h" + +#include "BPY_constobject.h" + +#define Const_Check(v) ((v)->ob_type == &Const_Type) + + +/* ----------------------------------------------------- */ +/* Declarations for objects of type const */ + + +PyTypeObject Const_Type; + +/* PROTOS */ + + + +static constobject * +newconstobject() +{ + constobject *self; + Const_Type.ob_type = &PyType_Type; + self = PyObject_NEW(constobject, &Const_Type); + if (self == NULL) + return NULL; + self->dict = PyDict_New(); + return self; +} + +char ConstObject_doc[] = "Readonly dictionary type\n\n\ +This is used as a container for constants, which can be accessed by two ways:\n\ +\n\ + c = <ConstObject>.<attribute>\n\ +\n\ +or\n\ + c = <ConstObject>['<attribute>']"; + +PyObject *ConstObject_New(void) +{ + return (PyObject *) newconstobject(); +} + +PyObject *const_repr(constobject *self) +{ + PyObject *repr; + repr = PyObject_Repr(self->dict); + return repr; +} + +static void const_dealloc(PyObject *self) { + Py_DECREF(((constobject *)self)->dict); + PyMem_DEL(self); +} +static PyObject * +const_getattr(constobject *self, char *name) +{ + PyObject *item; + if (STREQ(name, "__doc__")) { + return PyString_FromString(ConstObject_doc); + } + if (STREQ(name, "__members__")) { + return PyDict_Keys(self->dict); + } + item = PyDict_GetItemString(self->dict, name); /* borrowed ref ! */ + if (item) + Py_INCREF(item); + if (!item) { + PyErr_SetString(PyExc_AttributeError, name); + } + return item; +} + +/* inserts a constant with name into the dictionary self */ +void insertConst(PyObject *self, char *name, PyObject *cnst) +{ + PyDict_SetItemString(((constobject *)self)->dict, name, cnst); +} + + +/* Code to access const objects as mappings */ + +static int +const_length(constobject *self) +{ + return 0; +} + +static PyObject * +const_subscript(constobject *self, PyObject *key) +{ + PyObject *item; + item = PyDict_GetItem(self->dict, key); + if (item) + Py_INCREF(item); + return item; +} + +static int +const_ass_sub(constobject *self, PyObject *v, PyObject *w) +{ + /* no write access */ + return 0; +} + +static PyMappingMethods const_as_mapping = { + (inquiry)const_length, /*mp_length*/ + (binaryfunc)const_subscript, /*mp_subscript*/ + (objobjargproc)const_ass_sub, /*mp_ass_subscript*/ +}; + +/* -------------------------------------------------------- */ + +PyTypeObject Const_Type = { + PyObject_HEAD_INIT(NULL) + 0, /*ob_size*/ + "const", /*tp_name*/ + sizeof(constobject), /*tp_basicsize*/ + 0, /*tp_itemsize*/ + /* methods */ + (destructor) const_dealloc, /*tp_dealloc*/ + (printfunc) 0, /*tp_print*/ + (getattrfunc) const_getattr, /*tp_getattr*/ + (setattrfunc) 0, /*tp_setattr*/ + (cmpfunc) 0, /*tp_compare*/ + (reprfunc) const_repr, /*tp_repr*/ + 0, /*tp_as_number*/ + 0, /*tp_as_sequence*/ + &const_as_mapping, /*tp_as_mapping*/ + 0, /*tp_hash*/ +}; + |