2008-08-11 09:30:16 -07:00
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/* EINA - EFL data type library
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2008-09-01 05:42:16 -07:00
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* Copyright (C) 2002-2008 Cedric Bail
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2008-08-11 09:30:16 -07:00
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library;
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* if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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2008-08-28 00:46:42 -07:00
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#include <stdlib.h>
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2009-08-28 05:03:34 -07:00
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#include "eina_config.h"
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2008-08-11 09:30:16 -07:00
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#include "eina_private.h"
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2009-09-06 15:21:56 -07:00
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/* undefs EINA_ARG_NONULL() so NULL checks are not compiled out! */
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2008-12-26 10:31:14 -08:00
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#include "eina_safety_checks.h"
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2009-08-28 05:03:34 -07:00
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#include "eina_iterator.h"
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2008-12-09 05:06:17 -08:00
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2018-11-15 17:42:27 -08:00
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#include "eina_list.h"
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Make it possible to create iterators outside Eina.
Many places in EFL we just create walk something, create a list with
walked data, return, then the user walks it again and then deletes
(which will walk again). For such cases it's way better to define
iterators or accessors.
I'm not moving any EFL code to it now, but if people are interested,
things like evas_render_method_list(), evas_font_available_list(),
evas_objects_at_xy_get(), evas_objects_in_rectangle_get(),
evas_object_smart_members_get() are good candidates. If the subject is
already using Eina list, then you can just use
eina_list_iterator_new() and return it, otherwise you can define your
own iterator, which is very easy.
SVN revision: 37956
2008-12-05 19:41:03 -08:00
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/*============================================================================*
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2012-04-16 23:31:14 -07:00
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* Local *
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*============================================================================*/
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Make it possible to create iterators outside Eina.
Many places in EFL we just create walk something, create a list with
walked data, return, then the user walks it again and then deletes
(which will walk again). For such cases it's way better to define
iterators or accessors.
I'm not moving any EFL code to it now, but if people are interested,
things like evas_render_method_list(), evas_font_available_list(),
evas_objects_at_xy_get(), evas_objects_in_rectangle_get(),
evas_object_smart_members_get() are good candidates. If the subject is
already using Eina list, then you can just use
eina_list_iterator_new() and return it, otherwise you can define your
own iterator, which is very easy.
SVN revision: 37956
2008-12-05 19:41:03 -08:00
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/**
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* @cond LOCAL
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*/
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2009-09-06 20:32:22 -07:00
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static const char EINA_MAGIC_ITERATOR_STR[] = "Eina Iterator";
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2010-07-27 19:37:05 -07:00
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#define EINA_MAGIC_CHECK_ITERATOR(d) \
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do { \
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if (!EINA_MAGIC_CHECK(d, EINA_MAGIC_ITERATOR)) { \
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EINA_MAGIC_FAIL(d, EINA_MAGIC_ITERATOR); } \
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2012-04-16 23:31:14 -07:00
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} while(0)
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Make it possible to create iterators outside Eina.
Many places in EFL we just create walk something, create a list with
walked data, return, then the user walks it again and then deletes
(which will walk again). For such cases it's way better to define
iterators or accessors.
I'm not moving any EFL code to it now, but if people are interested,
things like evas_render_method_list(), evas_font_available_list(),
evas_objects_at_xy_get(), evas_objects_in_rectangle_get(),
evas_object_smart_members_get() are good candidates. If the subject is
already using Eina list, then you can just use
eina_list_iterator_new() and return it, otherwise you can define your
own iterator, which is very easy.
SVN revision: 37956
2008-12-05 19:41:03 -08:00
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/**
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* @endcond
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*/
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2008-08-28 00:46:42 -07:00
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/*============================================================================*
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2012-04-16 23:31:14 -07:00
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* Global *
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*============================================================================*/
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2008-08-28 00:46:42 -07:00
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2009-09-06 19:33:54 -07:00
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/**
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* @internal
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* @brief Initialize the iterator module.
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*
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* @return #EINA_TRUE on success, #EINA_FALSE on failure.
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*
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* This function sets up the iterator module of Eina. It is called by
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* eina_init().
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*
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* @see eina_init()
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*/
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Eina_Bool
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eina_iterator_init(void)
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{
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2009-09-06 20:32:22 -07:00
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return eina_magic_string_set(EINA_MAGIC_ITERATOR, EINA_MAGIC_ITERATOR_STR);
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2009-09-06 19:33:54 -07:00
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}
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/**
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* @internal
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* @brief Shut down the iterator module.
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*
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* @return #EINA_TRUE on success, #EINA_FALSE on failure.
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*
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* This function shuts down the iterator module set up by
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* eina_iterator_init(). It is called by eina_shutdown().
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*
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* @see eina_shutdown()
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*/
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Eina_Bool
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eina_iterator_shutdown(void)
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{
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return EINA_TRUE;
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}
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2009-12-27 00:45:30 -08:00
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/*============================================================================*
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2012-04-16 23:31:14 -07:00
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* API *
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*============================================================================*/
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2009-12-27 00:45:30 -08:00
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2008-08-11 09:30:16 -07:00
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EAPI void
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eina_iterator_free(Eina_Iterator *iterator)
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{
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2012-07-04 18:12:27 -07:00
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if (!iterator)
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return;
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|
Make it possible to create iterators outside Eina.
Many places in EFL we just create walk something, create a list with
walked data, return, then the user walks it again and then deletes
(which will walk again). For such cases it's way better to define
iterators or accessors.
I'm not moving any EFL code to it now, but if people are interested,
things like evas_render_method_list(), evas_font_available_list(),
evas_objects_at_xy_get(), evas_objects_in_rectangle_get(),
evas_object_smart_members_get() are good candidates. If the subject is
already using Eina list, then you can just use
eina_list_iterator_new() and return it, otherwise you can define your
own iterator, which is very easy.
SVN revision: 37956
2008-12-05 19:41:03 -08:00
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EINA_MAGIC_CHECK_ITERATOR(iterator);
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2008-12-26 10:31:14 -08:00
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EINA_SAFETY_ON_NULL_RETURN(iterator->free);
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iterator->free(iterator);
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2008-08-11 09:30:16 -07:00
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}
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EAPI void *
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eina_iterator_container_get(Eina_Iterator *iterator)
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{
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Make it possible to create iterators outside Eina.
Many places in EFL we just create walk something, create a list with
walked data, return, then the user walks it again and then deletes
(which will walk again). For such cases it's way better to define
iterators or accessors.
I'm not moving any EFL code to it now, but if people are interested,
things like evas_render_method_list(), evas_font_available_list(),
evas_objects_at_xy_get(), evas_objects_in_rectangle_get(),
evas_object_smart_members_get() are good candidates. If the subject is
already using Eina list, then you can just use
eina_list_iterator_new() and return it, otherwise you can define your
own iterator, which is very easy.
SVN revision: 37956
2008-12-05 19:41:03 -08:00
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EINA_MAGIC_CHECK_ITERATOR(iterator);
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2010-07-27 19:37:05 -07:00
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EINA_SAFETY_ON_NULL_RETURN_VAL(iterator, NULL);
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2008-12-26 10:31:14 -08:00
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EINA_SAFETY_ON_NULL_RETURN_VAL(iterator->get_container, NULL);
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2008-08-11 09:30:16 -07:00
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return iterator->get_container(iterator);
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}
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2008-08-12 01:40:36 -07:00
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EAPI Eina_Bool
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eina_iterator_next(Eina_Iterator *iterator, void **data)
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2008-08-11 09:30:16 -07:00
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{
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2010-07-27 19:37:05 -07:00
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if (!iterator)
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2012-04-16 23:31:14 -07:00
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return EINA_FALSE;
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2010-07-27 19:37:05 -07:00
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2008-12-11 05:54:59 -08:00
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EINA_MAGIC_CHECK_ITERATOR(iterator);
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2008-12-26 10:31:14 -08:00
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EINA_SAFETY_ON_NULL_RETURN_VAL(iterator->next, EINA_FALSE);
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2010-07-27 19:37:05 -07:00
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EINA_SAFETY_ON_NULL_RETURN_VAL(data, EINA_FALSE);
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2008-08-12 01:40:36 -07:00
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return iterator->next(iterator, data);
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2008-08-11 09:30:16 -07:00
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}
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EAPI void
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eina_iterator_foreach(Eina_Iterator *iterator,
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2010-08-11 07:32:30 -07:00
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Eina_Each_Cb cb,
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2010-07-27 19:37:05 -07:00
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const void *fdata)
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2008-08-11 09:30:16 -07:00
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{
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2008-12-26 10:31:14 -08:00
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const void *container;
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2008-08-11 09:30:16 -07:00
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void *data;
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2012-07-04 18:12:27 -07:00
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if (!iterator)
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return;
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2008-12-11 05:54:59 -08:00
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EINA_MAGIC_CHECK_ITERATOR(iterator);
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2008-12-26 10:31:14 -08:00
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EINA_SAFETY_ON_NULL_RETURN(iterator->get_container);
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EINA_SAFETY_ON_NULL_RETURN(iterator->next);
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EINA_SAFETY_ON_NULL_RETURN(cb);
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2008-12-11 05:54:59 -08:00
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2013-06-20 04:28:18 -07:00
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if (!eina_iterator_lock(iterator)) return;
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2010-08-11 07:32:30 -07:00
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2008-08-11 09:30:16 -07:00
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container = iterator->get_container(iterator);
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2012-04-16 23:31:14 -07:00
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while (iterator->next(iterator, &data) == EINA_TRUE)
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{
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2010-07-27 19:37:05 -07:00
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if (cb(container, data, (void *)fdata) != EINA_TRUE)
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2012-04-16 23:31:14 -07:00
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goto on_exit;
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2010-07-27 19:37:05 -07:00
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}
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2010-08-11 07:32:30 -07:00
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2012-04-16 23:31:14 -07:00
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on_exit:
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2010-08-11 07:32:30 -07:00
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(void) eina_iterator_unlock(iterator);
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}
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EAPI Eina_Bool
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eina_iterator_lock(Eina_Iterator *iterator)
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{
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EINA_MAGIC_CHECK_ITERATOR(iterator);
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EINA_SAFETY_ON_NULL_RETURN_VAL(iterator, EINA_FALSE);
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if (iterator->lock)
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2012-04-16 23:31:14 -07:00
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return iterator->lock(iterator);
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2010-08-11 07:32:30 -07:00
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return EINA_TRUE;
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}
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EAPI Eina_Bool
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eina_iterator_unlock(Eina_Iterator *iterator)
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{
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EINA_MAGIC_CHECK_ITERATOR(iterator);
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EINA_SAFETY_ON_NULL_RETURN_VAL(iterator, EINA_FALSE);
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if (iterator->unlock)
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2012-04-16 23:31:14 -07:00
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return iterator->unlock(iterator);
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2010-08-11 07:32:30 -07:00
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return EINA_TRUE;
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2008-08-11 09:30:16 -07:00
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}
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2016-03-06 12:24:34 -08:00
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typedef struct _Eina_Iterator_CArray Eina_Iterator_CArray;
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struct _Eina_Iterator_CArray
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{
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Eina_Iterator iterator;
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void** array;
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void** current;
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};
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static Eina_Bool
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eina_carray_iterator_next(Eina_Iterator_CArray *it, void **data)
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{
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if (!it->current || !*it->current)
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return EINA_FALSE;
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*data = *it->current++;
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return EINA_TRUE;
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}
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static void**
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eina_carray_iterator_get_container(Eina_Iterator_CArray *it)
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{
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return it->array;
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}
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static void
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eina_carray_iterator_free(Eina_Iterator_CArray *it)
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{
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free(it);
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}
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EAPI Eina_Iterator*
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eina_carray_iterator_new(void** array)
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{
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Eina_Iterator_CArray *it;
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it = calloc(1, sizeof (Eina_Iterator_CArray));
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if (!it) return NULL;
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EINA_MAGIC_SET(&it->iterator, EINA_MAGIC_ITERATOR);
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it->array = it->current = array;
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it->iterator.version = EINA_ITERATOR_VERSION;
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it->iterator.next = FUNC_ITERATOR_NEXT(eina_carray_iterator_next);
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it->iterator.get_container = FUNC_ITERATOR_GET_CONTAINER(
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eina_carray_iterator_get_container);
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it->iterator.free = FUNC_ITERATOR_FREE(eina_carray_iterator_free);
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return &it->iterator;
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}
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2016-11-20 06:24:26 -08:00
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2018-11-15 15:37:15 -08:00
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typedef struct _Eina_Iterator_CArray_Length Eina_Iterator_CArray_Length;
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struct _Eina_Iterator_CArray_Length
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{
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Eina_Iterator iterator;
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void** array;
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uintptr_t current;
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uintptr_t end;
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unsigned int step;
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};
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static Eina_Bool
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eina_carray_length_iterator_next(Eina_Iterator_CArray_Length *it, void **data)
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{
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if (it->current >= it->end)
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return EINA_FALSE;
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memcpy(data, (void*) it->current, it->step);
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it->current += it->step;
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return EINA_TRUE;
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}
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static void**
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eina_carray_length_iterator_get_container(Eina_Iterator_CArray_Length *it)
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{
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return it->array;
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}
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static void
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eina_carray_length_iterator_free(Eina_Iterator_CArray_Length *it)
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{
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free(it);
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}
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EAPI Eina_Iterator *
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eina_carray_length_iterator_new(void** array, unsigned int step, unsigned int length)
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{
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Eina_Iterator_CArray_Length *it;
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it = calloc(1, sizeof (Eina_Iterator_CArray_Length));
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if (!it) return NULL;
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EINA_MAGIC_SET(&it->iterator, EINA_MAGIC_ITERATOR);
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it->array = array;
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it->current = (uintptr_t) it->array;
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it->end = it->current + length * step;
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it->step = step;
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it->iterator.version = EINA_ITERATOR_VERSION;
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it->iterator.next = FUNC_ITERATOR_NEXT(eina_carray_length_iterator_next);
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it->iterator.get_container = FUNC_ITERATOR_GET_CONTAINER(
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eina_carray_length_iterator_get_container);
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it->iterator.free = FUNC_ITERATOR_FREE(eina_carray_length_iterator_free);
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return &it->iterator;
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}
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2018-11-15 17:42:27 -08:00
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typedef struct _Eina_Iterator_Multi Eina_Multi_Iterator;
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struct _Eina_Iterator_Multi
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{
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Eina_Iterator iterator;
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Eina_List *iterators;
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};
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static Eina_Bool
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eina_multi_iterator_next(Eina_Multi_Iterator *it, void **data)
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{
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if (!it->iterators)
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return EINA_FALSE;
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// Search for an iterator that do have some data
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while (!eina_iterator_next(eina_list_data_get(it->iterators), data))
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{
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eina_iterator_free(eina_list_data_get(it->iterators));
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it->iterators = eina_list_remove_list(it->iterators, it->iterators);
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if (!it->iterators) return EINA_FALSE;
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}
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return EINA_TRUE;
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}
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static void**
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eina_multi_iterator_get_container(Eina_Multi_Iterator *it)
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{
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if (!it->iterators) return NULL;
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return eina_iterator_container_get(eina_list_data_get(it->iterators));
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}
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static void
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eina_multi_iterator_free(Eina_Multi_Iterator *it)
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{
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Eina_Iterator *itc;
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EINA_LIST_FREE(it->iterators, itc)
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eina_iterator_free(itc);
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free(it);
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}
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EAPI Eina_Iterator *
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eina_multi_iterator_internal_new(Eina_Iterator *itc, ...)
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{
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Eina_Multi_Iterator *it;
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va_list args;
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it = calloc(1, sizeof (Eina_Multi_Iterator));
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if (!it) return NULL;
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EINA_MAGIC_SET(&it->iterator, EINA_MAGIC_ITERATOR);
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it->iterators = eina_list_append(it->iterators, itc);
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va_start(args, itc);
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while ((itc = (Eina_Iterator *) va_arg(args, Eina_Iterator *)))
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{
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it->iterators = eina_list_append(it->iterators, itc);
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}
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va_end(args);
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it->iterator.version = EINA_ITERATOR_VERSION;
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it->iterator.next = FUNC_ITERATOR_NEXT(eina_multi_iterator_next);
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it->iterator.get_container = FUNC_ITERATOR_GET_CONTAINER(
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eina_multi_iterator_get_container);
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it->iterator.free = FUNC_ITERATOR_FREE(eina_multi_iterator_free);
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|
return &it->iterator;
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|
}
|
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|
|
2016-11-20 06:24:26 -08:00
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|
|
typedef struct {
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|
|
|
Eina_Iterator iterator;
|
|
|
|
|
|
|
|
void *data;
|
|
|
|
Eina_Iterator *original;
|
|
|
|
Eina_Each_Cb cb;
|
2016-12-08 10:53:22 -08:00
|
|
|
Eina_Free_Cb free;
|
2016-11-20 06:24:26 -08:00
|
|
|
} Eina_Iterator_Filter;
|
|
|
|
|
|
|
|
static Eina_Bool
|
|
|
|
eina_iterator_filter_next(Eina_Iterator_Filter *it, void **data)
|
|
|
|
{
|
|
|
|
do
|
|
|
|
{
|
|
|
|
if (!eina_iterator_next(it->original , data))
|
|
|
|
return EINA_FALSE;
|
|
|
|
}
|
|
|
|
while (!it->cb(it->original, *data, it->data));
|
|
|
|
|
|
|
|
return EINA_TRUE;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void*
|
|
|
|
eina_iterator_filter_get_container(Eina_Iterator_Filter *it)
|
|
|
|
{
|
|
|
|
return it->original;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
eina_iterator_filter_free(Eina_Iterator_Filter *it)
|
|
|
|
{
|
2016-12-08 10:53:22 -08:00
|
|
|
if (it->free)
|
|
|
|
it->free(it->data);
|
2016-11-20 06:24:26 -08:00
|
|
|
eina_iterator_free(it->original);
|
|
|
|
free(it);
|
|
|
|
}
|
|
|
|
|
|
|
|
EAPI Eina_Iterator*
|
2016-12-08 10:53:22 -08:00
|
|
|
eina_iterator_filter_new(Eina_Iterator *iterator, Eina_Each_Cb filter, Eina_Free_Cb free_cb, void *data)
|
2016-11-20 06:24:26 -08:00
|
|
|
{
|
|
|
|
Eina_Iterator_Filter *it;
|
|
|
|
|
|
|
|
EINA_SAFETY_ON_NULL_RETURN_VAL(iterator, NULL);
|
|
|
|
EINA_SAFETY_ON_NULL_RETURN_VAL(filter, NULL);
|
|
|
|
|
|
|
|
it = calloc(1, sizeof(Eina_Iterator_Filter));
|
|
|
|
|
|
|
|
it->original = iterator;
|
|
|
|
it->data = data;
|
|
|
|
it->cb = filter;
|
2016-12-08 10:53:22 -08:00
|
|
|
it->free = free_cb;
|
2016-11-20 06:24:26 -08:00
|
|
|
|
|
|
|
EINA_MAGIC_SET(&it->iterator, EINA_MAGIC_ITERATOR);
|
|
|
|
|
|
|
|
it->iterator.version = EINA_ITERATOR_VERSION;
|
|
|
|
it->iterator.next = FUNC_ITERATOR_NEXT(eina_iterator_filter_next);
|
|
|
|
it->iterator.get_container = FUNC_ITERATOR_GET_CONTAINER(
|
|
|
|
eina_iterator_filter_get_container);
|
|
|
|
it->iterator.free = FUNC_ITERATOR_FREE(eina_iterator_filter_free);
|
|
|
|
|
|
|
|
return &it->iterator;
|
|
|
|
}
|