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-rw-r--r--camel/providers/cache/camel-cache-map.c259
1 files changed, 0 insertions, 259 deletions
diff --git a/camel/providers/cache/camel-cache-map.c b/camel/providers/cache/camel-cache-map.c
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--- a/camel/providers/cache/camel-cache-map.c
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-/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
-/* camel-cache-map.c : functions for a local<->remote uid map */
-
-/*
- * Authors:
- * Dan Winship <danw@helixcode.com>
- *
- * Copyright (C) 2000 Helix Code, Inc. (www.helixcode.com)
- *
- * 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 2 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, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
- * USA
- */
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include <errno.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <unistd.h>
-
-#include "camel-cache-map.h"
-#include <camel/camel-exception.h>
-
-/**
- * camel_cache_map_new:
- *
- * Return value: a new CamelCacheMap
- **/
-CamelCacheMap *
-camel_cache_map_new (void)
-{
- CamelCacheMap *map = g_new (CamelCacheMap, 1);
-
- map->l2r = g_hash_table_new (g_str_hash, g_str_equal);
- map->r2l = g_hash_table_new (g_str_hash, g_str_equal);
-
- return map;
-}
-
-static void
-free_mapping (gpointer key, gpointer value, gpointer data)
-{
- g_free (key);
- g_free (data);
-}
-
-/**
- * camel_cache_map_destroy:
- * @map: a CamelCacheMap
- *
- * Frees @map and all of the data stored in it.
- **/
-void
-camel_cache_map_destroy (CamelCacheMap *map)
-{
- g_hash_table_foreach (map->l2r, free_mapping, NULL);
- g_hash_table_destroy (map->l2r);
- g_hash_table_destroy (map->r2l);
- g_free (map);
-}
-
-/**
- * camel_cache_map_add:
- * @map: a CamelCacheMap
- * @luid: the local uid
- * @ruid: the remote uid
- *
- * Adds a mapping between @luid and @ruid. If either already exists
- * in the map, this may leak memory and result in incorrect map entries.
- * Use camel_cache_map_update() in that case instead.
- **/
-void
-camel_cache_map_add (CamelCacheMap *map, const char *luid, const char *ruid)
-{
- char *map_luid = g_strdup (luid);
- char *map_ruid = g_strdup (ruid);
-
- g_hash_table_insert (map->l2r, map_luid, map_ruid);
- g_hash_table_insert (map->r2l, map_ruid, map_luid);
-}
-
-/**
- * camel_cache_map_remove:
- * @map: a CamelCacheMap
- * @luid: the local uid
- * @ruid: the remote uid
- *
- * Removes the mapping between @luid and @ruid. Either (but not both)
- * of the uids can be %NULL if they are not both known.
- **/
-void
-camel_cache_map_remove (CamelCacheMap *map, const char *luid, const char *ruid)
-{
- gpointer map_luid, map_ruid;
-
- if ((luid && g_hash_table_lookup_extended (map->l2r, luid,
- &map_luid, &map_ruid)) ||
- (ruid && g_hash_table_lookup_extended (map->r2l, ruid,
- &map_luid, &map_ruid))) {
- g_hash_table_remove (map->l2r, map_luid);
- g_hash_table_remove (map->r2l, map_ruid);
- g_free (map_luid);
- g_free (map_ruid);
- }
-}
-
-/**
- * camel_cache_map_update:
- * @map: a CamelCacheMap
- * @luid: the local uid
- * @ruid: the remote uid
- *
- * Updates the mappings to associate @luid with @ruid, clearing any
- * previous mappings for both of them.
- **/
-void
-camel_cache_map_update (CamelCacheMap *map, const char *luid, const char *ruid)
-{
- camel_cache_map_remove (map, luid, ruid);
- camel_cache_map_add (map, luid, ruid);
-}
-
-/**
- * camel_cache_map_get_local
- * @map: a CamelCacheMap
- * @ruid: the remote uid
- *
- * Return value: the corresponding local uid, or %NULL
- **/
-const char *
-camel_cache_map_get_local (CamelCacheMap *map, const char *ruid)
-{
- return g_hash_table_lookup (map->r2l, ruid);
-}
-
-/**
- * camel_cache_map_get_remote
- * @map: a CamelCacheMap
- * @luid: the local uid
- *
- * Return value: the corresponding remote uid, or %NULL
- **/
-const char *
-camel_cache_map_get_remote (CamelCacheMap *map, const char *luid)
-{
- return g_hash_table_lookup (map->l2r, luid);
-}
-
-
-
-static void
-write_mapping (gpointer key, gpointer value, gpointer user_data)
-{
- int fd = *(int *)user_data;
-
- /* FIXME: We assume the local UID has no ':'s in it. */
- write (fd, key, strlen (key));
- write (fd, ":", 1);
- write (fd, value, strlen (value));
- write (fd, "\n", 1);
-}
-
-/**
- * camel_cache_map_write:
- * @map: a CamelCacheMap
- * @file: the filename to write the map to
- * @ex: a CamelException
- *
- * Writes @map out to @file, setting @ex if something goes wrong.
- **/
-void
-camel_cache_map_write (CamelCacheMap *map, const char *file,
- CamelException *ex)
-{
- int fd;
- char *tmpfile;
-
- tmpfile = g_strdup_printf ("%s~", file);
- fd = open (tmpfile, O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR);
- if (fd == -1) {
- g_free (tmpfile);
- camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
- _("Could not create cache map file: %s"),
- g_strerror (errno));
- return;
- }
-
- g_hash_table_foreach (map->l2r, write_mapping, &fd);
-
- if (close (fd) == -1 ||
- rename (tmpfile, file) == -1) {
- camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
- _("Could not save cache map file: %s"),
- g_strerror (errno));
- unlink (tmpfile);
- }
- g_free (tmpfile);
-}
-
-/**
- * camel_cache_map_read:
- * @map: a CamelCacheMap
- * @file: the filename to read the map from
- * @ex: a CamelException
- *
- * Reads @map from @file, setting @ex if something goes wrong. @map
- * should be a freshly-created CamelCacheMap.
- **/
-void
-camel_cache_map_read (CamelCacheMap *map, const char *file, CamelException *ex)
-{
- FILE *f;
- char buf[1024], *p, *q;
-
- /* FIXME: lazy implementation. We could make this work with
- * lines longer than 1024 chars. :)
- */
-
- f = fopen (file, "r");
- if (!f) {
- camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
- _("Could not open cache map file: %s"),
- g_strerror (errno));
- return;
- }
-
- while (fgets (buf, sizeof (buf), f)) {
- p = strchr (buf, ':');
- if (p)
- q = strchr (buf, '\n');
- if (!p || !q) {
- camel_exception_set (ex, CAMEL_EXCEPTION_SYSTEM,
- _("Bad cache file."));
- return;
- }
- *p++ = *q = '\0';
-
- /* Local uid at buf, remote at p. */
- camel_cache_map_add (map, buf, p);
- }
-
- fclose (f);
-}