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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 char symboliter_doc[] =
PyDoc_STR("symbol iterator.\n"
"\n"
"iterates over decode results attached to an image.");
static int symboliter_traverse(zbarSymbolIter *self, visitproc visit, void *arg)
{
Py_VISIT(self->syms);
return (0);
}
static int symboliter_clear(zbarSymbolIter *self)
{
if (self->zsym) {
zbar_symbol_t *zsym = (zbar_symbol_t *)self->zsym;
self->zsym = NULL;
zbar_symbol_ref(zsym, -1);
}
Py_CLEAR(self->syms);
return (0);
}
static void symboliter_dealloc(zbarSymbolIter *self)
{
symboliter_clear(self);
((PyObject *)self)->ob_type->tp_free((PyObject *)self);
}
static zbarSymbolIter *symboliter_iter(zbarSymbolIter *self)
{
Py_INCREF(self);
return (self);
}
static zbarSymbol *symboliter_iternext(zbarSymbolIter *self)
{
if (self->zsym) {
zbar_symbol_t *zsym = (zbar_symbol_t *)self->zsym;
zbar_symbol_ref(zsym, -1);
self->zsym = zbar_symbol_next(self->zsym);
} else if (self->syms->zsyms)
self->zsym = zbar_symbol_set_first_symbol(self->syms->zsyms);
else
self->zsym = NULL;
zbar_symbol_t *zsym = (zbar_symbol_t *)self->zsym;
if (!zsym)
return (NULL);
zbar_symbol_ref(zsym, 1);
return (zbarSymbol_FromSymbol(self->zsym));
}
PyTypeObject zbarSymbolIter_Type = {
PyVarObject_HEAD_INIT(NULL, 0).tp_name = "zbar.SymbolIter",
.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC,
.tp_doc = symboliter_doc,
.tp_basicsize = sizeof(zbarSymbolIter),
.tp_traverse = (traverseproc)symboliter_traverse,
.tp_clear = (inquiry)symboliter_clear,
.tp_dealloc = (destructor)symboliter_dealloc,
.tp_iter = (getiterfunc)symboliter_iter,
.tp_iternext = (iternextfunc)symboliter_iternext,
};
zbarSymbolIter *zbarSymbolIter_FromSymbolSet(zbarSymbolSet *syms)
{
zbarSymbolIter *self;
self = PyObject_GC_New(zbarSymbolIter, &zbarSymbolIter_Type);
if (!self)
return (NULL);
Py_INCREF(syms);
self->syms = syms;
self->zsym = NULL;
return (self);
}
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