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/* tags.c - Iterator for tags returned from message or thread
*
* Copyright © 2009 Carl Worth
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see http://www.gnu.org/licenses/ .
*
* Author: Carl Worth <cworth@cworth.org>
*/
#include "notmuch-private.h"
struct _notmuch_tags {
notmuch_string_node_t *iterator;
};
/* Create a new notmuch_tags_t object, with 'ctx' as its talloc owner.
* The returned iterator will talloc_steal the 'list', since the list
* is almost always transient.
*
* This function can return NULL in case of out-of-memory.
*/
notmuch_tags_t *
_notmuch_tags_create (const void *ctx, notmuch_string_list_t *list)
{
notmuch_tags_t *tags;
tags = talloc (ctx, notmuch_tags_t);
if (unlikely (tags == NULL))
return NULL;
tags->iterator = list->head;
talloc_steal (tags, list);
return tags;
}
notmuch_bool_t
notmuch_tags_valid (notmuch_tags_t *tags)
{
return tags->iterator != NULL;
}
const char *
notmuch_tags_get (notmuch_tags_t *tags)
{
if (tags->iterator == NULL)
return NULL;
return (char *) tags->iterator->string;
}
void
notmuch_tags_move_to_next (notmuch_tags_t *tags)
{
if (tags->iterator == NULL)
return;
tags->iterator = tags->iterator->next;
}
void
notmuch_tags_destroy (notmuch_tags_t *tags)
{
talloc_free (tags);
}
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