diff options
Diffstat (limited to 'src/grl-registry.c')
| -rw-r--r-- | src/grl-registry.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/src/grl-registry.c b/src/grl-registry.c index 2aedfa5..4f4e0af 100644 --- a/src/grl-registry.c +++ b/src/grl-registry.c @@ -671,6 +671,62 @@ grl_registry_register_metadata_key_for_type (GrlRegistry *registry, return grl_registry_register_metadata_key (registry, spec, GRL_METADATA_KEY_INVALID, NULL); } +/* + * Returns whether the string is a canonical one. + */ +static gboolean +is_canonical (const gchar *key) +{ + if (key == NULL) { + return FALSE; + } + + for (; *key != '\0'; key++) { + if (*key != '-' && + (*key < '0' || *key > '9') && + (*key < 'A' || *key > 'Z') && + (*key < 'a' || *key > 'z')) + return FALSE; + } + + return TRUE; +} + +G_GNUC_INTERNAL GrlKeyID +grl_registry_register_or_lookup_metadata_key (GrlRegistry *registry, + const gchar *key_name, + const GValue *value) +{ + GrlKeyID key; + GType value_type; + + g_return_val_if_fail (GRL_IS_REGISTRY (registry), GRL_METADATA_KEY_INVALID); + + if (value == NULL) + return GRL_METADATA_KEY_INVALID; + + key_name = g_intern_string (key_name); + g_return_val_if_fail (is_canonical (key_name), GRL_METADATA_KEY_INVALID); + + key = grl_registry_lookup_metadata_key (registry, key_name); + value_type = G_VALUE_TYPE (value); + + if (key == GRL_METADATA_KEY_INVALID) { + GRL_DEBUG ("%s is not a registered metadata-key", key_name); + key = grl_registry_register_metadata_key_for_type (registry, key_name, value_type); + } else { + GType key_type = grl_registry_lookup_metadata_key_type (registry, key); + if (!g_value_type_transformable (value_type, key_type)) { + GRL_WARNING ("Value type %s can't be set to existing metadata-key of type %s", + g_type_name (value_type), + g_type_name (key_type)); + return GRL_METADATA_KEY_INVALID; + } + } + + return key; +} + static void key_id_handler_init (struct KeyIDHandler *handler) { |