extern void record_file (Hash_table *ht, char const *file,
struct stat const *stats)
extern void record_file (Hash_table *ht, char const *file,
struct stat const *stats)
extern bool seen_file (Hash_table const *ht, char const *file,
struct stat const *stats);
extern bool seen_file (Hash_table const *ht, char const *file,
struct stat const *stats);