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/*
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* The implementation of the different descriptors.
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*
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* Copyright (c) 2010 Riverbank Computing Limited <info@riverbankcomputing.com>
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*
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* This file is part of SIP.
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*
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* This copy of SIP is licensed for use under the terms of the SIP License
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* Agreement. See the file LICENSE for more details.
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*
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* This copy of SIP may also used under the terms of the GNU General Public
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* License v2 or v3 as published by the Free Software Foundation which can be
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* found in the files LICENSE-GPL2 and LICENSE-GPL3 included in this package.
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*
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* SIP is supplied WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#include <Python.h>
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#include "sip.h"
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#include "sipint.h"
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/*****************************************************************************
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* A method descriptor. We don't use the similar Python descriptor because it
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* doesn't support a method having static and non-static overloads.
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*****************************************************************************/
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/* Forward declarations of slots. */
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static PyObject *sipMethodDescr_descr_get(PyObject *self, PyObject *obj,
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PyObject *type);
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static PyObject *sipMethodDescr_repr(PyObject *self);
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/*
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* The object data structure.
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*/
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typedef struct _sipMethodDescr {
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PyObject_HEAD
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/* The method definition. */
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PyMethodDef *pmd;
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} sipMethodDescr;
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/*
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* The type data structure.
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*/
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PyTypeObject sipMethodDescr_Type = {
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PyVarObject_HEAD_INIT(NULL, 0)
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"sip.methoddescriptor", /* tp_name */
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sizeof (sipMethodDescr), /* tp_basicsize */
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0, /* tp_itemsize */
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0, /* tp_dealloc */
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0, /* tp_print */
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0, /* tp_getattr */
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0, /* tp_setattr */
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0, /* tp_compare */
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sipMethodDescr_repr, /* 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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0, /* tp_hash */
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0, /* tp_call */
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0, /* tp_str */
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0, /* tp_getattro */
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0, /* tp_setattro */
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0, /* tp_as_buffer */
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Py_TPFLAGS_DEFAULT, /* tp_flags */
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0, /* tp_doc */
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0, /* tp_traverse */
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0, /* tp_clear */
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0, /* tp_richcompare */
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0, /* tp_weaklistoffset */
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0, /* tp_iter */
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0, /* tp_iternext */
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0, /* tp_methods */
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0, /* tp_members */
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0, /* tp_getset */
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0, /* tp_base */
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0, /* tp_dict */
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sipMethodDescr_descr_get, /* tp_descr_get */
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};
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/*
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* Return a new method descriptor for the given method.
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*/
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PyObject *sipMethodDescr_New(PyMethodDef *pmd)
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{
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PyObject *descr = PyType_GenericAlloc(&sipMethodDescr_Type, 0);
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if (descr != NULL)
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((sipMethodDescr *)descr)->pmd = pmd;
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return descr;
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}
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/*
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* The descriptor's descriptor get slot.
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*/
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static PyObject *sipMethodDescr_descr_get(PyObject *self, PyObject *obj,
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PyObject *type)
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{
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sipMethodDescr *md = (sipMethodDescr *)self;
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if (obj == Py_None)
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obj = NULL;
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return PyCFunction_New(md->pmd, obj);
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}
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/*
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* The descriptor's repr slot. This is for the benefit of cProfile which seems
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* to determine attribute names differently to the rest of Python.
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*/
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static PyObject *sipMethodDescr_repr(PyObject *self)
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{
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sipMethodDescr *md = (sipMethodDescr *)self;
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return
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#if PY_MAJOR_VERSION >= 3
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PyUnicode_FromFormat
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#else
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PyString_FromFormat
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#endif
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("<built-in method %s>", md->pmd->ml_name);
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}
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/*****************************************************************************
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* A variable descriptor. We don't use the similar Python descriptor because
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* it doesn't support static variables.
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*****************************************************************************/
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/* Forward declarations of slots. */
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static PyObject *sipVariableDescr_descr_get(PyObject *self, PyObject *obj,
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PyObject *type);
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static int sipVariableDescr_descr_set(PyObject *self, PyObject *obj,
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PyObject *value);
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/*
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* The object data structure.
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*/
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typedef struct _sipVariableDescr {
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PyObject_HEAD
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/* The getter/setter definition. */
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sipVariableDef *vd;
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/* The generated type definition. */
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const sipTypeDef *td;
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/* The generated container definition. */
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const sipContainerDef *cod;
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} sipVariableDescr;
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/*
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* The type data structure.
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*/
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PyTypeObject sipVariableDescr_Type = {
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PyVarObject_HEAD_INIT(NULL, 0)
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"sip.variabledescriptor", /* tp_name */
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sizeof (sipVariableDescr), /* tp_basicsize */
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0, /* tp_itemsize */
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0, /* tp_dealloc */
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0, /* tp_print */
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0, /* tp_getattr */
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0, /* 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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0, /* tp_hash */
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0, /* tp_call */
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0, /* tp_str */
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0, /* tp_getattro */
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0, /* tp_setattro */
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0, /* tp_as_buffer */
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Py_TPFLAGS_DEFAULT, /* tp_flags */
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0, /* tp_doc */
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0, /* tp_traverse */
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0, /* tp_clear */
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0, /* tp_richcompare */
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0, /* tp_weaklistoffset */
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0, /* tp_iter */
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0, /* tp_iternext */
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0, /* tp_methods */
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0, /* tp_members */
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0, /* tp_getset */
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0, /* tp_base */
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0, /* tp_dict */
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sipVariableDescr_descr_get, /* tp_descr_get */
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sipVariableDescr_descr_set, /* tp_descr_set */
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};
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/* Forward declarations. */
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static int get_instance_address(sipVariableDescr *vd, PyObject *obj,
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void **addrp);
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/*
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* Return a new method descriptor for the given getter/setter.
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*/
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PyObject *sipVariableDescr_New(sipVariableDef *vd, const sipTypeDef *td,
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const sipContainerDef *cod)
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{
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PyObject *descr = PyType_GenericAlloc(&sipVariableDescr_Type, 0);
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if (descr != NULL)
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{
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((sipVariableDescr *)descr)->vd = vd;
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((sipVariableDescr *)descr)->td = td;
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((sipVariableDescr *)descr)->cod = cod;
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}
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return descr;
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}
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/*
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* The descriptor's descriptor get slot.
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*/
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static PyObject *sipVariableDescr_descr_get(PyObject *self, PyObject *obj,
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PyObject *type)
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{
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sipVariableDescr *vd = (sipVariableDescr *)self;
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void *addr;
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if (get_instance_address(vd, obj, &addr) < 0)
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return NULL;
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return vd->vd->vd_getter(addr, type);
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}
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/*
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* The descriptor's descriptor set slot.
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*/
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static int sipVariableDescr_descr_set(PyObject *self, PyObject *obj,
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PyObject *value)
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{
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sipVariableDescr *vd = (sipVariableDescr *)self;
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void *addr;
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/* Check that the value isn't const. */
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if (vd->vd->vd_setter == NULL)
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{
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PyErr_Format(PyExc_AttributeError,
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"'%s' object attribute '%s' is read-only",
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sipPyNameOfContainer(vd->cod, vd->td), vd->vd->vd_name);
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return -1;
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}
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if (get_instance_address(vd, obj, &addr) < 0)
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return -1;
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return vd->vd->vd_setter(addr, value, obj);
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}
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/*
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* Return the C/C++ address of any instance.
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*/
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static int get_instance_address(sipVariableDescr *vd, PyObject *obj,
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void **addrp)
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{
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void *addr;
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if (vd->vd->vd_is_static)
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{
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addr = NULL;
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}
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else
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{
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/* Check that access was via an instance. */
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if (obj == NULL || obj == Py_None)
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{
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PyErr_Format(PyExc_AttributeError,
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"'%s' object attribute '%s' is an instance attribute",
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sipPyNameOfContainer(vd->cod, vd->td), vd->vd->vd_name);
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return -1;
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}
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/* Get the C++ instance. */
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if ((addr = sip_api_get_cpp_ptr((sipSimpleWrapper *)obj, vd->td)) == NULL)
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return -1;
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}
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*addrp = addr;
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return 0;
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}
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