static void
librdf_list_add_iterator_context(librdf_list* list,
librdf_list_iterator_context* node)
{
if(list->last_iterator) {
node->prev_ic=list->last_iterator;
list->last_iterator->next_ic=node;
}
list->last_iterator=node;
if(!list->first_iterator)
list->first_iterator=node;
list->iterator_count++;
#if defined(LIBRDF_DEBUG) && LIBRDF_DEBUG > 2
LIBRDF_DEBUG4("Added iterator %p to list %p giving %d iterators\n",
node->iterator, list, list->iterator_count);
#endif
}
static void
librdf_list_remove_iterator_context(librdf_list* list,
librdf_list_iterator_context* node)
{
if(node == list->first_iterator)
list->first_iterator=node->next_ic;
if(node->prev_ic)
node->prev_ic->next_ic=node->next_ic;
if(node == list->last_iterator)
list->last_iterator=node->prev_ic;
if(node->next_ic)
node->next_ic->prev_ic=node->prev_ic;
list->iterator_count--;
#if defined(LIBRDF_DEBUG) && LIBRDF_DEBUG > 2
LIBRDF_DEBUG4("Removed iterator %p from list %p leaving %d iterators\n",
node->iterator, list, list->iterator_count);
#endif
}
static void
librdf_list_iterators_replace_node(librdf_list* list,
librdf_list_node* old_node,
librdf_list_node* new_node)
{
librdf_list_iterator_context *node, *next;
if(!list->iterator_count)
return;
for(node=list->first_iterator; node; node=next) {
next=node->next_ic;
if(node->next == old_node) {
#if defined(LIBRDF_DEBUG) && LIBRDF_DEBUG > 2
LIBRDF_DEBUG4("Moved iterator %p pointing from next node %p to %p\n",
node->iterator, old_node, new_node);
#endif
node->next = new_node;
}
}
}
/**
* librdf_new_sql_config:
* @world: librdf_world
* @storage_name: SQL storage name
* @layout: SQL schema variant
* @config_dir: directory for configuration files
* @predicate_uri_strings: configuration predicate URIs to look for
*
* Constructor - Make a new SQL configuration for a layout from a file
*
* Uses SQL storage name @storage_name and with database schema
* @layout to give a configuration that will contain an array of
* string values in the #librdf_sql_config field values array.
*
* Return value: configuration or NULL on failure
**/
librdf_sql_config*
librdf_new_sql_config(librdf_world* world,
const char* storage_name,
const char* layout,
const char* config_dir,
const char** predicate_uri_strings)
{
raptor_parser* rdf_parser=NULL;
unsigned char *uri_string=NULL;
raptor_uri *base_uri;
raptor_uri *uri;
librdf_sql_config* config;
size_t len;
int i;
librdf_world_open(world);
config=(librdf_sql_config*)LIBRDF_MALLOC(librdf_sql_config,
sizeof(librdf_sql_config));
len=strlen(config_dir) + 1 + strlen(storage_name) + 4 + 1;
if(layout)
len+= strlen(layout) + 1;
config->filename=(char*)LIBRDF_MALLOC(cstring, len);
if(layout)
sprintf(config->filename, "%s/%s-%s.ttl", config_dir, storage_name, layout);
else
sprintf(config->filename, "%s/%s.ttl", config_dir, storage_name);
config->predicate_uri_strings=predicate_uri_strings;
for(i=0; config->predicate_uri_strings[i]; i++)
;
config->predicates_count=i;
config->values=(char**)LIBRDF_CALLOC(cstring, sizeof(char*),
config->predicates_count);
LIBRDF_DEBUG4("Attempting to open %s layout %s storage config file %s\n",
storage_name, (layout ? layout: "(default)"), config->filename);
if(access((const char*)config->filename, R_OK)) {
librdf_log(world, 0, LIBRDF_LOG_ERROR, LIBRDF_FROM_STORAGE, NULL,
"Failed to open configuration file %s for storage %s layout %s - %s",
config->filename, storage_name, (layout ? layout: "(default)"),
strerror(errno));
librdf_free_sql_config(config);
return NULL;
}
uri_string=raptor_uri_filename_to_uri_string(config->filename);
uri=raptor_new_uri(uri_string);
base_uri=raptor_uri_copy(uri);
rdf_parser=raptor_new_parser("turtle");
raptor_set_statement_handler(rdf_parser, config,
librdf_sql_config_store_triple);
raptor_parse_file(rdf_parser, uri, base_uri);
raptor_free_parser(rdf_parser);
raptor_free_uri(base_uri);
raptor_free_memory(uri_string);
raptor_free_uri(uri);
/* Check all values are given */
for(i=0; i < config->predicates_count; i++) {
if(!config->values[i]) {
librdf_log(world, 0, LIBRDF_LOG_ERROR, LIBRDF_FROM_STORAGE, NULL,
"Configuration %s missing for storage %s",
config->predicate_uri_strings[i], storage_name);
librdf_free_sql_config(config);
return NULL;
}
}
return config;
}
