struct ddb_view *ddb_view_cons_finalize(const struct ddb_view_cons *cons,
struct ddb *db)
{
uint32_t n = ddb_map_num_items(cons->map);
struct ddb_cursor *cursor = ddb_unique_values(db);
struct ddb_view *view = malloc(4 + n * sizeof(valueid_t));
const struct ddb_entry *value;
valueid_t id = 0;
int err = 0;
if (!(cursor && view))
goto err;
view->num_values = 0;
while (n && (value = ddb_next(cursor, &err))){
++id;
if (ddb_map_lookup_str(cons->map, value)){
view->values[view->num_values++] = id;
--n;
}
}
if (!err){
ddb_free_cursor(cursor);
return view;
}
err:
ddb_view_free(view);
ddb_free_cursor(cursor);
return NULL;
}
static void print_cursor(struct ddb *db, struct ddb_cursor *cur)
{
if (!cur){
const char *err;
ddb_error(db, &err);
fprintf(stderr, "Query failed: %s\n", err);
exit(1);
}
if (ddb_notfound(cur)){
fprintf(stderr, "Not found\n");
exit(1);
}
int errno, i = 0;
const struct ddb_entry *e;
while ((e = ddb_next(cur, &errno))){
printf("%.*s\n", e->length, e->data);
++i;
}
if (errno){
fprintf(stderr, "Cursor failed: out of memory\n");
exit(1);
}
ddb_free_cursor(cur);
}
struct ddb_cons *ddb_cons_ddb(struct ddb *db)
{
struct ddb_cons *cons;
struct ddb_cursor *keys = NULL, *vals = NULL;
const struct ddb_entry *k, *v;
int errno = 0;
if (!(cons = ddb_cons_new()))
goto error;
if (!(keys = ddb_keys(db)))
goto error;
while ((k = ddb_next(keys, &errno))) {
if (!(vals = ddb_getitem(db, k)))
goto error;
while ((v = ddb_next(vals, &errno)))
if (ddb_cons_add(cons, k, v))
goto error;
if (errno)
goto error;
ddb_free_cursor(vals);
}
if (errno)
goto error;
ddb_free_cursor(keys);
return cons;
error:
if (cons)
ddb_cons_free(cons);
if (keys)
ddb_free_cursor(keys);
if (vals)
ddb_free_cursor(vals);
return NULL;
}
static void
ddb_cursor_dealloc(struct ddb_cursor *cursor)
{
if (cursor)
ddb_free_cursor(cursor);
}
