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https://git.notmuchmail.org/git/notmuch
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8a8e2b11c2
This operation is relatively inexpensive, as the needed metadata is already computed by our lazy metadata fetching. The goal is to support better UI for messages with multipile files.
101 lines
2.6 KiB
C
101 lines
2.6 KiB
C
/* strings.c - Iterator for a list of strings
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*
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* Copyright © 2010 Intel Corporation
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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 https://www.gnu.org/licenses/ .
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*
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* Author: Carl Worth <cworth@cworth.org>
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* Austin Clements <aclements@csail.mit.edu>
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*/
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#include "notmuch-private.h"
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/* Create a new notmuch_string_list_t object, with 'ctx' as its
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* 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_string_list_t *
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_notmuch_string_list_create (const void *ctx)
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{
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notmuch_string_list_t *list;
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list = talloc (ctx, notmuch_string_list_t);
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if (unlikely (list == NULL))
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return NULL;
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list->length = 0;
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list->head = NULL;
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list->tail = &list->head;
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return list;
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}
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int
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_notmuch_string_list_length (notmuch_string_list_t *list)
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{
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return list->length;
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}
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void
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_notmuch_string_list_append (notmuch_string_list_t *list,
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const char *string)
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{
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/* Create and initialize new node. */
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notmuch_string_node_t *node = talloc (list, notmuch_string_node_t);
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node->string = talloc_strdup (node, string);
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node->next = NULL;
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/* Append the node to the list. */
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*(list->tail) = node;
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list->tail = &node->next;
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list->length++;
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}
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static int
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cmpnode (const void *pa, const void *pb)
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{
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notmuch_string_node_t *a = *(notmuch_string_node_t * const *)pa;
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notmuch_string_node_t *b = *(notmuch_string_node_t * const *)pb;
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return strcmp (a->string, b->string);
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}
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void
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_notmuch_string_list_sort (notmuch_string_list_t *list)
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{
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notmuch_string_node_t **nodes, *node;
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int i;
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if (list->length == 0)
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return;
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nodes = talloc_array (list, notmuch_string_node_t *, list->length);
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if (unlikely (nodes == NULL))
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INTERNAL_ERROR ("Could not allocate memory for list sort");
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for (i = 0, node = list->head; node; i++, node = node->next)
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nodes[i] = node;
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qsort (nodes, list->length, sizeof (*nodes), cmpnode);
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for (i = 0; i < list->length - 1; ++i)
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nodes[i]->next = nodes[i+1];
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nodes[i]->next = NULL;
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list->head = nodes[0];
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list->tail = &nodes[i]->next;
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talloc_free (nodes);
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}
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