- int get_nkeys(int* nkeys);
- int get_nthkey(int n, char* key);
- int get_valuelen(const char* key, int* valuelen, int* flag);
+ int get_nkeys(int* nkeys) const;
+ int get_nthkey(int n, char* key) const;
+ int get_valuelen(const char* key, int* valuelen, int* flag) const;