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d3349358c6
The new object is simply a linked-list of notmuch_message_t objects, (unlike the old object which contained a couple of Xapian iterators). This works now by the query code immediately iterator over all results and creating notmuch_message_t objects for them, (rather than waiting to create the objects until the notmuch_messages_get call as we did earlier). The point of this change is to allow other instances of lists of messages, (such as in notmuch_thread_t), that are not directly related to Xapian search results.
97 lines
2.3 KiB
C
97 lines
2.3 KiB
C
/* messages.c - Iterator for a set of messages
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*
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* Copyright © 2009 Carl Worth
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see http://www.gnu.org/licenses/ .
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*
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* Author: Carl Worth <cworth@cworth.org>
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*/
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#include "notmuch-private.h"
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#include <glib.h> /* GList */
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typedef struct _message_list {
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notmuch_message_t *message;
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struct _message_list *next;
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} message_list_t;
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struct _notmuch_messages {
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message_list_t *head;
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message_list_t **tail;
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};
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/* Create a new notmuch_messages_t object, with 'ctx' as its talloc owner.
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*
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* This function can return NULL in case of out-of-memory.
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*/
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notmuch_messages_t *
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_notmuch_messages_create (void *ctx)
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{
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notmuch_messages_t *messages;
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messages = talloc (ctx, notmuch_messages_t);
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if (unlikely (messages == NULL))
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return NULL;
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messages->head = NULL;
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messages->tail = &messages->head;
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return messages;
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}
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/* Add a new message to 'messages'.
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*/
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void
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_notmuch_messages_add_message (notmuch_messages_t *messages,
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notmuch_message_t *message)
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{
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message_list_t *new = talloc (messages, message_list_t);
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new->message = message;
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new->next = NULL;
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*(messages->tail) = new;
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messages->tail = &new->next;
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}
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notmuch_bool_t
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notmuch_messages_has_more (notmuch_messages_t *messages)
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{
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return messages->head != NULL;
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}
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notmuch_message_t *
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notmuch_messages_get (notmuch_messages_t *messages)
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{
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if (messages->head == NULL)
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return NULL;
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return messages->head->message;
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}
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void
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notmuch_messages_advance (notmuch_messages_t *messages)
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{
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if (messages->head == NULL)
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return;
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messages->head = messages->head->next;
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}
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void
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notmuch_messages_destroy (notmuch_messages_t *messages)
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{
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talloc_free (messages);
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}
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