/**
* librdf_storage_trees_close:
* @storage: the storage
*
* .
*
* Close the storage, and free all content since there is no persistance.
*
* Return value: non 0 on failure
**/
static int
librdf_storage_trees_close(librdf_storage* storage)
{
librdf_storage_trees_instance* context=(librdf_storage_trees_instance*)storage->instance;
librdf_storage_trees_graph_free(context->graph);
context->graph=NULL;
#ifdef RDF_STORAGE_TREES_WITH_CONTEXTS
librdf_free_avltree(context->contexts);
context->contexts=NULL;
#endif
return 0;
}
/**
* librdf_storage_trees_context_remove_statement:
* @storage: #librdf_storage object
* @context_node: #librdf_node object
* @statement: #librdf_statement statement to remove
*
* Remove a statement from a storage context.
*
* Return value: non 0 on failure
**/
static int
librdf_storage_trees_context_remove_statement(librdf_storage* storage,
librdf_node* context_node,
librdf_statement* statement)
{
librdf_storage_trees_instance* context=(librdf_storage_trees_instance*)storage->instance;
librdf_storage_trees_graph* key=librdf_storage_trees_graph_new(storage, context_node);
librdf_storage_trees_graph* graph=(librdf_storage_trees_graph*)
librdf_avltree_search(context->contexts, &key);
librdf_storage_trees_graph_free(key);
if (graph) {
return librdf_storage_trees_remove_statement_internal(graph, statement);
} else {
return -1;
}
}
/**
* librdf_storage_trees_context_add_statement:
* @storage: #librdf_storage object
* @context_node: #librdf_node object
* @statement: #librdf_statement statement to add
*
* Add a statement to a storage context.
*
* Return value: non 0 on failure
**/
static int
librdf_storage_trees_context_add_statement(librdf_storage* storage,
librdf_node* context_node,
librdf_statement* statement)
{
librdf_storage_trees_context* context=(librdf_storage_trees_context*)storage->context;
librdf_storage_trees_graph* key=librdf_storage_trees_graph_new(storage, context_node);
librdf_storage_trees_graph* graph=(librdf_storage_trees_graph*)
librdf_avltree_search(context->contexts, key);
if(graph) {
librdf_storage_trees_graph_free(key);
} else {
librdf_avltree_add(context->contexts, key);
graph=key;
}
return librdf_storage_trees_add_statement_internal(storage, graph, statement);
}
