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/* Implementation of Signature type for D-Bus bindings.
*
* Copyright (C) 2006 Collabora Ltd. <http://www.collabora.co.uk/>
*
* SPDX-License-Identifier: MIT
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include "dbus_bindings-internal.h"
#include <Python.h>
#include <structmember.h>
#include "types-internal.h"
PyDoc_STRVAR(Signature_tp_doc,
"Signature(value: str or unicode[, variant_level: int])\n"
"\n"
"A string subclass whose values are restricted to valid D-Bus\n"
"signatures. When iterated over, instead of individual characters it\n"
"produces Signature instances representing single complete types.\n"
"\n"
"``value`` must be a valid D-Bus signature (zero or more single complete\n"
"types).\n"
"\n"
":py:attr:`variant_level` must be non-negative; the default is 0.\n"
"\n"
".. py:attribute:: variant_level\n"
"\n"
" Indicates how many nested Variant containers this object\n"
" is contained in: if a message's wire format has a variant containing a\n"
" variant containing a signature, this is represented in Python by a\n"
" Signature with variant_level==2.\n"
);
typedef struct {
PyObject_HEAD
PyObject *bytes;
DBusSignatureIter iter;
} SignatureIter;
static void
SignatureIter_tp_dealloc (SignatureIter *self)
{
Py_CLEAR(self->bytes);
PyObject_Del(self);
}
static PyObject *
SignatureIter_tp_iternext (SignatureIter *self)
{
char *sig;
PyObject *obj;
/* Stop immediately if finished or not correctly initialized */
if (!self->bytes) return NULL;
sig = dbus_signature_iter_get_signature(&(self->iter));
if (!sig) return PyErr_NoMemory();
obj = PyObject_CallFunction((PyObject *)&DBusPySignature_Type, "s", sig);
dbus_free(sig);
if (!obj) return NULL;
if (!dbus_signature_iter_next(&(self->iter))) {
/* mark object as having been finished with */
Py_CLEAR(self->bytes);
}
return obj;
}
static PyObject *
SignatureIter_tp_iter(PyObject *self)
{
Py_INCREF(self);
return self;
}
static PyTypeObject SignatureIterType = {
PyVarObject_HEAD_INIT(DEFERRED_ADDRESS(&PyType_Type), 0)
"_dbus_bindings._SignatureIter",
sizeof(SignatureIter),
0,
(destructor)SignatureIter_tp_dealloc, /* tp_dealloc */
0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_compare */
0, /* tp_repr */
0, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
0, /* tp_hash */
0, /* tp_call */
0, /* tp_str */
0, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT, /* tp_flags */
0, /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
SignatureIter_tp_iter, /* tp_iter */
(iternextfunc)SignatureIter_tp_iternext, /* tp_iternext */
0, /* tp_methods */
0, /* tp_members */
0, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
0, /* tp_init */
0, /* tp_alloc */
/* deliberately not callable! Use iter(Signature) instead */
0, /* tp_new */
0, /* tp_free */
};
static PyObject *
Signature_tp_iter(PyObject *self)
{
SignatureIter *iter = PyObject_New(SignatureIter, &SignatureIterType);
PyObject *self_as_bytes;
if (!iter) return NULL;
self_as_bytes = PyUnicode_AsUTF8String(self);
if (!self_as_bytes) {
Py_CLEAR(iter);
return NULL;
}
if (PyBytes_GET_SIZE(self_as_bytes) > 0) {
iter->bytes = self_as_bytes;
dbus_signature_iter_init(&(iter->iter),
PyBytes_AS_STRING(self_as_bytes));
}
else {
/* this is a null string, make a null iterator */
iter->bytes = NULL;
Py_CLEAR(self_as_bytes);
}
return (PyObject *)iter;
}
static PyObject *
Signature_tp_new (PyTypeObject *cls, PyObject *args, PyObject *kwargs)
{
const char *str = NULL;
PyObject *ignored;
static char *argnames[] = {"object_path", "variant_level", NULL};
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s|O:__new__", argnames,
&str, &ignored)) return NULL;
if (!dbus_signature_validate(str, NULL)) {
PyErr_SetString(PyExc_ValueError, "Corrupt type signature");
return NULL;
}
return (DBusPyStrBase_Type.tp_new)(cls, args, kwargs);
}
PyTypeObject DBusPySignature_Type = {
PyVarObject_HEAD_INIT(DEFERRED_ADDRESS(&PyType_Type), 0)
"dbus.Signature",
0,
0,
0, /* tp_dealloc */
0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_compare */
0, /* tp_repr */
0, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
0, /* tp_hash */
0, /* tp_call */
0, /* tp_str */
0, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */
Signature_tp_doc, /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
Signature_tp_iter, /* tp_iter */
0, /* tp_iternext */
0, /* tp_methods */
0, /* tp_members */
0, /* tp_getset */
DEFERRED_ADDRESS(&DBusPyStrBase_Type), /* tp_base */
0, /* tp_dict */
0, /* tp_descr_get */
0, /* tp_descr_set */
0, /* tp_dictoffset */
0, /* tp_init */
0, /* tp_alloc */
Signature_tp_new, /* tp_new */
0, /* tp_free */
};
dbus_bool_t
dbus_py_init_signature(void)
{
if (PyType_Ready(&SignatureIterType) < 0) return 0;
DBusPySignature_Type.tp_base = &DBusPyStrBase_Type;
if (PyType_Ready(&DBusPySignature_Type) < 0) return 0;
return 1;
}
dbus_bool_t
dbus_py_insert_signature(PyObject *this_module)
{
/* PyModule_AddObject steals a ref */
Py_INCREF(&DBusPySignature_Type);
if (PyModule_AddObject(this_module, "Signature",
(PyObject *)&DBusPySignature_Type) < 0) return 0;
Py_INCREF(&SignatureIterType);
if (PyModule_AddObject(this_module, "_SignatureIter",
(PyObject *)&SignatureIterType) < 0) return 0;
return 1;
}
/* vim:set ft=c cino< sw=4 sts=4 et: */
|
