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Diffstat (limited to 'camel/camel-uid-cache.c')
| -rw-r--r-- | camel/camel-uid-cache.c | 240 |
1 files changed, 0 insertions, 240 deletions
diff --git a/camel/camel-uid-cache.c b/camel/camel-uid-cache.c deleted file mode 100644 index 37cbde3110..0000000000 --- a/camel/camel-uid-cache.c +++ /dev/null @@ -1,240 +0,0 @@ -/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */ -/* camel-uid-cache.c: UID caching code. */ - -/* - * Authors: - * Dan Winship <danw@ximian.com> - * - * Copyright 2000 Ximian, Inc. (www.ximian.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 <string.h> -#include <sys/stat.h> -#include <unistd.h> - -#include "camel-uid-cache.h" - -struct _uid_state { - int level; - gboolean save; -}; - -static void free_uid (gpointer key, gpointer value, gpointer data); -static void maybe_write_uid (gpointer key, gpointer value, gpointer data); - -/** - * camel_uid_cache_new: - * @filename: path to load the cache from - * - * Creates a new UID cache, initialized from @filename. If @filename - * doesn't already exist, the UID cache will be empty. Otherwise, if - * it does exist but can't be read, the function will return %NULL. - * - * Return value: a new UID cache, or %NULL - **/ -CamelUIDCache * -camel_uid_cache_new (const char *filename) -{ - CamelUIDCache *cache; - struct stat st; - char *buf, **uids; - int fd, i; - - fd = open (filename, O_RDWR | O_CREAT, 0700); - if (fd == -1) - return NULL; - - if (fstat (fd, &st) != 0) { - close (fd); - return NULL; - } - buf = g_malloc (st.st_size + 1); - - if (read (fd, buf, st.st_size) == -1) { - close (fd); - g_free (buf); - return NULL; - } - buf[st.st_size] = '\0'; - - cache = g_new (CamelUIDCache, 1); - cache->fd = fd; - cache->level = 1; - cache->uids = g_hash_table_new (g_str_hash, g_str_equal); - - uids = g_strsplit (buf, "\n", 0); - g_free (buf); - for (i = 0; uids[i]; i++) { - struct _uid_state *state; - - state = g_new (struct _uid_state, 1); - state->level = cache->level; - state->save = TRUE; - - g_hash_table_insert (cache->uids, uids[i], state); - } - g_free (uids); - - return cache; -} - -/** - * camel_uid_cache_save: - * @cache: a CamelUIDCache - * - * Attempts to save @cache back to disk. - * - * Return value: success or failure - **/ -gboolean -camel_uid_cache_save (CamelUIDCache *cache) -{ - if (lseek (cache->fd, 0, SEEK_SET) != 0) - return FALSE; - g_hash_table_foreach (cache->uids, maybe_write_uid, cache); - return ftruncate (cache->fd, lseek (cache->fd, 0, SEEK_CUR)) == 0; -} - -static void -maybe_write_uid (gpointer key, gpointer value, gpointer data) -{ - CamelUIDCache *cache = data; - struct _uid_state *state = value; - - if (state && state->level == cache->level && state->save) { - write (cache->fd, key, strlen (key)); - write (cache->fd, "\n", 1); - } -} - - -/** - * camel_uid_cache_destroy: - * @cache: a CamelUIDCache - * - * Destroys @cache and frees its data. - **/ -void -camel_uid_cache_destroy (CamelUIDCache *cache) -{ - g_hash_table_foreach (cache->uids, free_uid, NULL); - g_hash_table_destroy (cache->uids); - close (cache->fd); - g_free (cache); -} - -static void -free_uid (gpointer key, gpointer value, gpointer data) -{ - g_free (key); - g_free (value); -} - - -/** - * camel_uid_cache_get_new_uids: - * @cache: a CamelUIDCache - * @uids: an array of UIDs - * - * Returns an array of UIDs from @uids that are not in @cache, and - * removes UIDs from @cache that aren't in @uids. - * - * Return value: an array of new UIDs, which must be freed with - * camel_uid_cache_free_uids(). - **/ -GPtrArray * -camel_uid_cache_get_new_uids (CamelUIDCache *cache, GPtrArray *uids) -{ - GPtrArray *new_uids; - gpointer old_uid; - char *uid; - int i; - - new_uids = g_ptr_array_new (); - cache->level++; - - for (i = 0; i < uids->len; i++) { - struct _uid_state *state; - - uid = uids->pdata[i]; - if (g_hash_table_lookup_extended (cache->uids, uid, &old_uid, &state)) { - g_hash_table_remove (cache->uids, uid); - g_free (old_uid); - } else { - g_ptr_array_add (new_uids, g_strdup (uid)); - state = g_new (struct _uid_state, 1); - state->save = FALSE; - } - - state->level = cache->level; - g_hash_table_insert (cache->uids, g_strdup (uid), state); - } - - return new_uids; -} - - -/** - * camel_uid_cache_save_uid: - * @cache: a CamelUIDCache - * @uid: a uid to save - * - * Marks a uid for saving. - **/ -void -camel_uid_cache_save_uid (CamelUIDCache *cache, const char *uid) -{ - struct _uid_state *state; - gpointer old_uid; - - g_return_if_fail (uid != NULL); - - if (g_hash_table_lookup_extended (cache->uids, uid, &old_uid, &state)) { - state->save = TRUE; - state->level = cache->level; - } else { - state = g_new (struct _uid_state, 1); - state->save = TRUE; - state->level = cache->level; - - g_hash_table_insert (cache->uids, g_strdup (uid), state); - } -} - - -/** - * camel_uid_cache_free_uids: - * @uids: an array returned from camel_uid_cache_get_new_uids() - * - * Frees the array of UIDs. - **/ -void -camel_uid_cache_free_uids (GPtrArray *uids) -{ - int i; - - for (i = 0; i < uids->len; i++) - g_free (uids->pdata[i]); - g_ptr_array_free (uids, TRUE); -} |