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 off_t ad_reso_size(const char *path, int adflags, struct adouble *ad);
/* ad_conv.c */
extern int ad_convert(const char *path, const struct stat *sp, const struct vol *vol, const char **newpath);