Example #1
0
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;
}
Example #2
0
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);
}
Example #3
0
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;
}
Example #4
0
static void
ddb_cursor_dealloc(struct ddb_cursor *cursor)
{
    if (cursor)
        ddb_free_cursor(cursor);
}