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/*
* Copyright © 2010 Codethink Limited
* Copyright © 2012 Canonical Limited
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the licence, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*
* Author: Ryan Lortie <desrt@desrt.ca>
*/
#include "config.h"
#include "dconf-engine-source-private.h"
#include <string.h>
void
dconf_engine_source_free (DConfEngineSource *source)
{
if (source->values)
gvdb_table_free (source->values);
if (source->locks)
gvdb_table_free (source->locks);
source->vtable->finalize (source);
g_free (source->bus_name);
g_free (source->object_path);
g_free (source->name);
g_free (source);
}
gboolean
dconf_engine_source_refresh (DConfEngineSource *source)
{
if (source->vtable->needs_reopen (source))
{
gboolean was_open;
gboolean is_open;
/* Record if we had a gvdb before or not. */
was_open = source->values != NULL;
g_clear_pointer (&source->values, gvdb_table_free);
g_clear_pointer (&source->locks, gvdb_table_free);
source->values = source->vtable->reopen (source);
if (source->values)
source->locks = gvdb_table_get_table (source->values, ".locks");
/* Check if we ended up with a gvdb. */
is_open = source->values != NULL;
/* Only return TRUE in the case that we either had a database
* before or ended up with one after. In the case that we just go
* from NULL to NULL, return FALSE.
*/
return was_open || is_open;
}
return FALSE;
}
DConfEngineSource *
dconf_engine_source_new (const gchar *description)
{
const DConfEngineSourceVTable *vtable;
DConfEngineSource *source;
const gchar *colon;
/* Source descriptions are of the form
*
* type:name
*
* Where type must currently be one of "user-db" or "system-db".
*
* We first find the colon.
*/
colon = strchr (description, ':');
/* Ensure that we have a colon and that a database name follows it. */
if (colon == NULL || colon[1] == '\0')
return NULL;
/* Check if the part before the colon is "user-db"... */
if ((colon == description + 7) && memcmp (description, "user-db", 7) == 0)
vtable = &dconf_engine_source_user_vtable;
/* ...or "service-db" */
else if ((colon == description + 10) && memcmp (description, "service-db", 10) == 0)
vtable = &dconf_engine_source_service_vtable;
/* ...or "system-db" */
else if ((colon == description + 9) && memcmp (description, "system-db", 9) == 0)
vtable = &dconf_engine_source_system_vtable;
/* ...or "file-db" */
else if ((colon == description + 7) && memcmp (description, "file-db", 7) == 0)
vtable = &dconf_engine_source_file_vtable;
/* If it's not any of those, we have failed. */
else
return NULL;
/* We have had a successful parse.
*
* - either user-db: or system-db:
* - non-NULL and non-empty database name
*
* Create the source.
*/
source = g_malloc0 (vtable->instance_size);
source->vtable = vtable;
source->name = g_strdup (colon + 1);
source->vtable->init (source);
return source;
}
DConfEngineSource *
dconf_engine_source_new_default (void)
{
DConfEngineSource *source;
source = g_malloc0 (dconf_engine_source_user_vtable.instance_size);
source->vtable = &dconf_engine_source_user_vtable;
source->name = g_strdup ("user");
source->vtable->init (source);
return source;
}
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