extern int ad_metadataat (int, const char *, int, struct adouble *);
extern mode_t ad_hf_mode(mode_t mode);
extern int ad_valid_header_osx(const char *path);
extern int ad_metadataat (int, const char *, int, struct adouble *);
extern mode_t ad_hf_mode(mode_t mode);
extern int ad_valid_header_osx(const char *path);