Hashing a password for MySQL.c

#if MYSQL_VERSION_ID < 40100 || defined(USE_OLD_MYSQL_SCRAMBLING)
        unsigned long hash_res[2];
        char scrambled_password[MYSQL_CRYPT_LEN];
     
# if MYSQL_VERSION_ID < 40100
        hash_password(hash_res, password);
# else
        hash_password(hash_res, password, strlen(password));        
# endif     
        snprintf(scrambled_password, sizeof scrambled_password, "%08lx%08lx", 
                 hash_res[0], hash_res[1]);
#else
        char scrambled_password[42]; /* 2 * 20 (sha1 hash size) + 2 */

# if MYSQL_VERSION_ID >= 40100 && MYSQL_VERSION_ID < 40101
        make_scrambled_password(scrambled_password, password, 1, NULL);
# else
#  ifdef HAVE_MY_MAKE_SCRAMBLED_PASSWORD
        my_make_scrambled_password(scrambled_password, password,
                                   strlen(password));
#  else
        make_scrambled_password(scrambled_password, password);
#  endif
# endif
#endif