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/*------------------------------------------------------------------------
* Copyright 2009 (c) Jeff Brown <spadix@users.sourceforge.net>
*
* This file is part of the ZBar Bar Code Reader.
*
* The ZBar Bar Code Reader is free software; you can redistribute it
* and/or modify it under the terms of the GNU Lesser Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* The ZBar Bar Code Reader 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 Lesser Public License for more details.
*
* You should have received a copy of the GNU Lesser Public License
* along with the ZBar Bar Code Reader; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301 USA
*
* http://sourceforge.net/projects/zbar
*------------------------------------------------------------------------*/
#include "zbarmodule.h"
static inline PyObject*
exc_get_message (zbarException *self,
void *closure)
{
PyBaseExceptionObject *super = (PyBaseExceptionObject*)self;
if(!PyString_Size(super->message)) {
Py_CLEAR(super->message);
if(!self->obj || !zbarProcessor_Check(self->obj))
super->message = PyString_FromString("unknown zbar error");
else {
const void *zobj = ((zbarProcessor*)self->obj)->zproc;
super->message = PyString_FromString(_zbar_error_string(zobj, 1));
}
}
Py_INCREF(super->message);
return(super->message);
}
static int
exc_init (zbarException *self,
PyObject *args,
PyObject *kwds)
{
if(!_PyArg_NoKeywords(self->base.ob_type->tp_name, kwds))
return(-1);
PyBaseExceptionObject *super = (PyBaseExceptionObject*)self;
Py_CLEAR(super->args);
Py_INCREF(args);
super->args = args;
if(PyTuple_GET_SIZE(args) == 1) {
Py_CLEAR(self->obj);
self->obj = PyTuple_GET_ITEM(args, 0);
Py_INCREF(self->obj);
}
return(0);
}
static int
exc_traverse (zbarException *self,
visitproc visit,
void *arg)
{
Py_VISIT(self->obj);
PyTypeObject *base = (PyTypeObject*)PyExc_Exception;
return(base->tp_traverse((PyObject*)self, visit, arg));
}
static int
exc_clear (zbarException *self)
{
Py_CLEAR(self->obj);
((PyTypeObject*)PyExc_Exception)->tp_clear((PyObject*)self);
return(0);
}
static void
exc_dealloc (zbarException *self)
{
exc_clear(self);
((PyTypeObject*)PyExc_Exception)->tp_dealloc((PyObject*)self);
}
static PyObject*
exc_str (zbarException *self)
{
return(exc_get_message(self, NULL));
}
static int
exc_set_message (zbarException *self,
PyObject *value,
void *closure)
{
PyBaseExceptionObject *super = (PyBaseExceptionObject*)self;
Py_CLEAR(super->message);
if(!value)
value = PyString_FromString("");
else
Py_INCREF(value);
super->message = value;
return(0);
}
static PyGetSetDef exc_getset[] = {
{ "message", (getter)exc_get_message, (setter)exc_set_message, },
{ NULL, },
};
PyTypeObject zbarException_Type = {
PyObject_HEAD_INIT(NULL)
.tp_name = "zbar.Exception",
.tp_basicsize = sizeof(zbarException),
.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE |
Py_TPFLAGS_HAVE_GC,
.tp_init = (initproc)exc_init,
.tp_traverse = (traverseproc)exc_traverse,
.tp_clear = (inquiry)exc_clear,
.tp_dealloc = (destructor)exc_dealloc,
.tp_str = (reprfunc)exc_str,
.tp_getset = exc_getset,
};
PyObject*
zbarErr_Set (PyObject *self)
{
const void *zobj = ((zbarProcessor*)self)->zproc;
zbar_error_t err = _zbar_get_error_code(zobj);
if(err == ZBAR_ERR_NOMEM)
PyErr_NoMemory();
else if(err < ZBAR_ERR_NUM) {
PyObject *type = zbar_exc[err];
assert(type);
PyErr_SetObject(type, self);
}
else
PyErr_SetObject(zbar_exc[0], self);
return(NULL);
}
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