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/* EINA - EFL data type library
* Copyright (C) 2002-2008 Cedric Bail
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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 General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library;
* if not, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdlib.h>
#include "eina_config.h"
#include "eina_private.h"
/* undefs EINA_ARG_NONULL() so NULL checks are not compiled out! */
#include "eina_safety_checks.h"
#include "eina_iterator.h"
/*============================================================================*
* Local *
*============================================================================*/
/**
* @cond LOCAL
*/
static const char EINA_MAGIC_ITERATOR_STR[] = "Eina Iterator";
#define EINA_MAGIC_CHECK_ITERATOR(d) \
do { \
if (!EINA_MAGIC_CHECK(d, EINA_MAGIC_ITERATOR)) { \
EINA_MAGIC_FAIL(d, EINA_MAGIC_ITERATOR); } \
} while(0)
/**
* @endcond
*/
/*============================================================================*
* Global *
*============================================================================*/
/**
* @internal
* @brief Initialize the iterator module.
*
* @return #EINA_TRUE on success, #EINA_FALSE on failure.
*
* This function sets up the iterator module of Eina. It is called by
* eina_init().
*
* @see eina_init()
*/
Eina_Bool
eina_iterator_init(void)
{
return eina_magic_string_set(EINA_MAGIC_ITERATOR, EINA_MAGIC_ITERATOR_STR);
}
/**
* @internal
* @brief Shut down the iterator module.
*
* @return #EINA_TRUE on success, #EINA_FALSE on failure.
*
* This function shuts down the iterator module set up by
* eina_iterator_init(). It is called by eina_shutdown().
*
* @see eina_shutdown()
*/
Eina_Bool
eina_iterator_shutdown(void)
{
return EINA_TRUE;
}
/*============================================================================*
* API *
*============================================================================*/
EAPI void
eina_iterator_free(Eina_Iterator *iterator)
{
EINA_MAGIC_CHECK_ITERATOR(iterator);
EINA_SAFETY_ON_NULL_RETURN(iterator);
EINA_SAFETY_ON_NULL_RETURN(iterator->free);
iterator->free(iterator);
}
EAPI void *
eina_iterator_container_get(Eina_Iterator *iterator)
{
EINA_MAGIC_CHECK_ITERATOR(iterator);
EINA_SAFETY_ON_NULL_RETURN_VAL(iterator, NULL);
EINA_SAFETY_ON_NULL_RETURN_VAL(iterator->get_container, NULL);
return iterator->get_container(iterator);
}
EAPI Eina_Bool
eina_iterator_next(Eina_Iterator *iterator, void **data)
{
if (!iterator)
return EINA_FALSE;
EINA_MAGIC_CHECK_ITERATOR(iterator);
EINA_SAFETY_ON_NULL_RETURN_VAL(iterator, EINA_FALSE);
EINA_SAFETY_ON_NULL_RETURN_VAL(iterator->next, EINA_FALSE);
EINA_SAFETY_ON_NULL_RETURN_VAL(data, EINA_FALSE);
return iterator->next(iterator, data);
}
EAPI void
eina_iterator_foreach(Eina_Iterator *iterator,
Eina_Each_Cb cb,
const void *fdata)
{
const void *container;
void *data;
EINA_MAGIC_CHECK_ITERATOR(iterator);
EINA_SAFETY_ON_NULL_RETURN(iterator);
EINA_SAFETY_ON_NULL_RETURN(iterator->get_container);
EINA_SAFETY_ON_NULL_RETURN(iterator->next);
EINA_SAFETY_ON_NULL_RETURN(cb);
if (!eina_iterator_lock(iterator)) return ;
container = iterator->get_container(iterator);
while (iterator->next(iterator, &data) == EINA_TRUE) {
if (cb(container, data, (void *)fdata) != EINA_TRUE)
goto on_exit;
}
on_exit:
(void) eina_iterator_unlock(iterator);
}
EAPI Eina_Bool
eina_iterator_lock(Eina_Iterator *iterator)
{
EINA_MAGIC_CHECK_ITERATOR(iterator);
EINA_SAFETY_ON_NULL_RETURN_VAL(iterator, EINA_FALSE);
if (iterator->lock)
return iterator->lock(iterator);
return EINA_TRUE;
}
EAPI Eina_Bool
eina_iterator_unlock(Eina_Iterator *iterator)
{
EINA_MAGIC_CHECK_ITERATOR(iterator);
EINA_SAFETY_ON_NULL_RETURN_VAL(iterator, EINA_FALSE);
if (iterator->unlock)
return iterator->unlock(iterator);
return EINA_TRUE;
}
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