Function compare_hostname

sql/sql_acl.cc:4702–4714

static bool compare_hostname(const acl_host_and_ip *host, const char *hostname,
			     const char *ip)
{
  long tmp;
  if (host->ip_mask && ip && calc_ip(ip,&tmp,'\0'))
  {
    return (tmp & host->ip_mask) == host->ip;
  }
  return (!host->hostname ||
	  (hostname && !wild_case_compare(system_charset_info,
                                          hostname, host->hostname)) ||
	  (ip && !wild_compare(ip, host->hostname, 0)));
}

/**
  Check if the given host name needs to be resolved or not.