diff options
Diffstat (limited to 'src/uca-plugin-manager.c')
| -rw-r--r-- | src/uca-plugin-manager.c | 217 |
1 files changed, 124 insertions, 93 deletions
diff --git a/src/uca-plugin-manager.c b/src/uca-plugin-manager.c index 61e43f8..c044a4a 100644 --- a/src/uca-plugin-manager.c +++ b/src/uca-plugin-manager.c @@ -23,6 +23,10 @@ struct _UcaPluginManagerPrivate { GList *search_paths; }; +static const gchar *MODULE_PATTERN = "libuca([A-Za-z]+)"; + +typedef UcaCamera * (*GetCameraFunc) (GError **error); + /** * UcaPluginManagerError: * @UCA_PLUGIN_MANAGER_ERROR_MODULE_NOT_FOUND: The module could not be found @@ -70,30 +74,24 @@ uca_plugin_manager_add_path (UcaPluginManager *manager, } static GList * -get_camera_names_from_directory (const gchar *path) +get_camera_module_paths (const gchar *path) { - static const gchar *pattern_string = "libuca([A-Za-z]+)"; - GRegex *pattern; + GRegex *pattern; GDir *dir; GList *result = NULL; - - pattern = g_regex_new (pattern_string, 0, 0, NULL); + + pattern = g_regex_new (MODULE_PATTERN, 0, 0, NULL); dir = g_dir_open (path, 0, NULL); if (dir != NULL) { GMatchInfo *match_info = NULL; - const gchar *name = g_dir_read_name (dir); + const gchar *name = g_dir_read_name (dir); while (name != NULL) { - g_regex_match (pattern, name, 0, &match_info); - - if (g_match_info_matches (match_info)) { - gchar *word = g_match_info_fetch (match_info, 1); - - if (word != NULL) - result = g_list_append (result, word); - } + if (g_regex_match (pattern, name, 0, &match_info)) + result = g_list_append (result, g_build_filename (path, name, NULL)); + g_match_info_free (match_info); name = g_dir_read_name (dir); } } @@ -101,105 +99,138 @@ get_camera_names_from_directory (const gchar *path) return result; } +static GList * +scan_search_paths (GList *search_paths) +{ + GList *camera_paths = NULL; + + for (GList *it = g_list_first (search_paths); it != NULL; it = g_list_next (it)) { + camera_paths = g_list_concat (camera_paths, + get_camera_module_paths ((const gchar*) it->data)); + } + + return camera_paths; +} + +static void +transform_camera_module_path_to_name (gchar *path, GList **result) +{ + GRegex *pattern; + GMatchInfo *match_info; + + pattern = g_regex_new (MODULE_PATTERN, 0, 0, NULL); + g_regex_match (pattern, path, 0, &match_info); + + *result = g_list_append (*result, g_match_info_fetch (match_info, 1)); + g_match_info_free (match_info); +} + +static void +g_list_free_full (GList *list) +{ + g_list_foreach (list, (GFunc) g_free, NULL); + g_list_free (list); +} + GList * uca_plugin_manager_get_available_cameras (UcaPluginManager *manager) { UcaPluginManagerPrivate *priv; + GList *camera_paths; GList *camera_names = NULL; g_return_val_if_fail (UCA_IS_PLUGIN_MANAGER (manager), NULL); priv = manager->priv; + camera_paths = scan_search_paths (priv->search_paths); - for (GList *it = g_list_first (priv->search_paths); it != NULL; it = g_list_next (it)) { - camera_names = g_list_concat (camera_names, - get_camera_names_from_directory ((const gchar*) it->data)); - } + g_list_foreach (camera_paths, (GFunc) transform_camera_module_path_to_name, &camera_names); + g_list_free_full (camera_paths); return camera_names; } +static gchar * +find_camera_module_path (GList *search_paths, const gchar *name) +{ + gchar *result = NULL; + GList *paths; + + paths = scan_search_paths (search_paths); + + for (GList *it = g_list_first (paths); it != NULL; it = g_list_next (it)) { + gchar *path = (gchar *) it->data; + gchar *basename = g_path_get_basename ((gchar *) path); + + if (g_strrstr (basename, name)) { + result = g_strdup (path); + g_free (basename); + break; + } + + g_free (basename); + } + + g_list_free_full (paths); + return result; +} + UcaCamera * uca_plugin_manager_new_camera (UcaPluginManager *manager, const gchar *name, GError **error) { - return NULL; -} + UcaPluginManagerPrivate *priv; + UcaCamera *camera; + GModule *module; + GetCameraFunc *func; + gchar *module_path; + GError *tmp_error = NULL; -/** - * uca_plugin_manager_get_filter: - * @manager: A #UcaPluginManager - * @name: Name of the plugin. - * @error: return location for a GError or %NULL - * - * Load a #UcaFilter module and return an instance. The shared object name must - * be * constructed as "libfilter@name.so". - * - * Returns: (transfer none) (allow-none): #UcaFilter or %NULL if module cannot be found - * - * Since: 0.2, the error parameter is available - */ -/* UcaFilter * */ -/* uca_plugin_manager_get_filter (UcaPluginManager *manager, const gchar *name, GError **error) */ -/* { */ -/* g_return_val_if_fail (UCA_IS_PLUGIN_MANAGER (manager) && (name != NULL), NULL); */ -/* UcaPluginManagerPrivate *priv = UCA_PLUGIN_MANAGER_GET_PRIVATE (manager); */ -/* UcaFilter *filter; */ -/* GetFilterFunc *func = NULL; */ -/* GModule *module = NULL; */ -/* gchar *module_name = NULL; */ -/* const gchar *entry_symbol_name = "uca_filter_plugin_new"; */ - -/* func = g_hash_table_lookup (priv->filter_funcs, name); */ - -/* if (func == NULL) { */ -/* module_name = g_strdup_printf ("libucafilter%s.so", name); */ -/* gchar *path = plugin_manager_get_path (priv, module_name); */ - -/* if (path == NULL) { */ -/* g_set_error (error, UCA_PLUGIN_MANAGER_ERROR, UCA_PLUGIN_MANAGER_ERROR_MODULE_NOT_FOUND, */ -/* "Module %s not found", module_name); */ -/* goto handle_error; */ -/* } */ - -/* module = g_module_open (path, G_MODULE_BIND_LAZY); */ -/* g_free (path); */ - -/* if (!module) { */ -/* g_set_error (error, UCA_PLUGIN_MANAGER_ERROR, UCA_PLUGIN_MANAGER_ERROR_MODULE_OPEN, */ -/* "Module %s could not be opened: %s", module_name, g_module_error ()); */ -/* goto handle_error; */ -/* } */ - -/* func = g_malloc0 (sizeof (GetFilterFunc)); */ - -/* if (!g_module_symbol (module, entry_symbol_name, (gpointer *) func)) { */ -/* g_set_error (error, UCA_PLUGIN_MANAGER_ERROR, UCA_PLUGIN_MANAGER_ERROR_SYMBOL_NOT_FOUND, */ -/* "%s is not exported by module %s: %s", entry_symbol_name, module_name, g_module_error ()); */ -/* g_free (func); */ - -/* if (!g_module_close (module)) */ -/* g_warning ("%s", g_module_error ()); */ - -/* goto handle_error; */ -/* } */ - -/* priv->modules = g_slist_append (priv->modules, module); */ -/* g_hash_table_insert (priv->filter_funcs, g_strdup (name), func); */ -/* g_free (module_name); */ -/* } */ - -/* filter = (*func) (); */ -/* uca_filter_set_plugin_name (filter, name); */ -/* g_message ("UcaPluginManager: Created %s-%p", name, (gpointer) filter); */ - -/* return filter; */ - -/* handle_error: */ -/* g_free (module_name); */ -/* return NULL; */ -/* } */ + const gchar *symbol_name = "uca_camera_impl_new"; + + g_return_val_if_fail (UCA_IS_PLUGIN_MANAGER (manager) && (name != NULL), NULL); + + priv = manager->priv; + module_path = find_camera_module_path (priv->search_paths, name); + + if (module_path == NULL) { + g_set_error (error, UCA_PLUGIN_MANAGER_ERROR, UCA_PLUGIN_MANAGER_ERROR_MODULE_NOT_FOUND, + "Camera module `%s' not found", name); + return NULL; + } + + module = g_module_open (module_path, G_MODULE_BIND_LAZY); + g_free (module_path); + + if (!module) { + g_set_error (error, UCA_PLUGIN_MANAGER_ERROR, UCA_PLUGIN_MANAGER_ERROR_MODULE_OPEN, + "Camera module `%s' could not be opened: %s", name, g_module_error ()); + return NULL; + } + + func = g_malloc0 (sizeof (GetCameraFunc)); + + if (!g_module_symbol (module, symbol_name, (gpointer *) func)) { + g_set_error (error, UCA_PLUGIN_MANAGER_ERROR, UCA_PLUGIN_MANAGER_ERROR_SYMBOL_NOT_FOUND, + "%s", g_module_error ()); + g_free (func); + + if (!g_module_close (module)) + g_warning ("%s", g_module_error ()); + + return NULL; + } + + camera = (*func) (&tmp_error); + + if (tmp_error != NULL) { + g_propagate_error (error, tmp_error); + return NULL; + } + + return camera; +} static void uca_plugin_manager_get_property (GObject *object, guint property_id, GValue *value, GParamSpec *pspec) |