104 lines
3.2 KiB
C
104 lines
3.2 KiB
C
/*------------------------------------------------------------------------
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* Copyright 2009 (c) Jeff Brown <spadix@users.sourceforge.net>
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*
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* This file is part of the ZBar Bar Code Reader.
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*
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* The ZBar Bar Code Reader is free software; you can redistribute it
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* and/or modify it under the terms of the GNU Lesser Public License as
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* published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* The ZBar Bar Code Reader is distributed in the hope that it will be
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser Public License for more details.
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*
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* You should have received a copy of the GNU Lesser Public License
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* along with the ZBar Bar Code Reader; if not, write to the Free
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* Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301 USA
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*
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* http://sourceforge.net/projects/zbar
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*------------------------------------------------------------------------*/
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#include "zbarmodule.h"
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static char symboliter_doc[] =
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PyDoc_STR("symbol iterator.\n"
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"\n"
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"iterates over decode results attached to an image.");
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static int symboliter_traverse(zbarSymbolIter *self, visitproc visit, void *arg)
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{
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Py_VISIT(self->syms);
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return (0);
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}
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static int symboliter_clear(zbarSymbolIter *self)
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{
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if (self->zsym) {
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zbar_symbol_t *zsym = (zbar_symbol_t *)self->zsym;
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self->zsym = NULL;
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zbar_symbol_ref(zsym, -1);
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}
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Py_CLEAR(self->syms);
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return (0);
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}
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static void symboliter_dealloc(zbarSymbolIter *self)
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{
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symboliter_clear(self);
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((PyObject *)self)->ob_type->tp_free((PyObject *)self);
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}
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static zbarSymbolIter *symboliter_iter(zbarSymbolIter *self)
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{
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Py_INCREF(self);
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return (self);
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}
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static zbarSymbol *symboliter_iternext(zbarSymbolIter *self)
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{
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if (self->zsym) {
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zbar_symbol_t *zsym = (zbar_symbol_t *)self->zsym;
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zbar_symbol_ref(zsym, -1);
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self->zsym = zbar_symbol_next(self->zsym);
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} else if (self->syms->zsyms)
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self->zsym = zbar_symbol_set_first_symbol(self->syms->zsyms);
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else
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self->zsym = NULL;
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zbar_symbol_t *zsym = (zbar_symbol_t *)self->zsym;
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if (!zsym)
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return (NULL);
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zbar_symbol_ref(zsym, 1);
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return (zbarSymbol_FromSymbol(self->zsym));
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}
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PyTypeObject zbarSymbolIter_Type = {
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PyVarObject_HEAD_INIT(NULL, 0).tp_name = "zbar.SymbolIter",
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.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC,
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.tp_doc = symboliter_doc,
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.tp_basicsize = sizeof(zbarSymbolIter),
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.tp_traverse = (traverseproc)symboliter_traverse,
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.tp_clear = (inquiry)symboliter_clear,
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.tp_dealloc = (destructor)symboliter_dealloc,
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.tp_iter = (getiterfunc)symboliter_iter,
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.tp_iternext = (iternextfunc)symboliter_iternext,
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};
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zbarSymbolIter *zbarSymbolIter_FromSymbolSet(zbarSymbolSet *syms)
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{
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zbarSymbolIter *self;
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self = PyObject_GC_New(zbarSymbolIter, &zbarSymbolIter_Type);
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if (!self)
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return (NULL);
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Py_INCREF(syms);
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self->syms = syms;
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self->zsym = NULL;
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return (self);
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}
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