/* Copyright (C) 1993-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by David Mosberger (davidm@azstarnet.com).

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#ifndef _RES_HCONF_H_

#define _RES_HCONF_H_

#include <netdb.h>

#define TRIMDOMAINS_MAX	4

struct hconf

{

  /* We keep the INITIALIZED member only for backwards compatibility.  New

     code should just call _res_hconf_init unconditionally.  For this field

     to be used safely, users must ensure that either (1) a call to

     _res_hconf_init happens-before any load from INITIALIZED, or (2) an

     assignment of zero to INITIALIZED happens-before any load from it, and

     these loads use acquire MO if the intent is to skip calling

     _res_hconf_init if the load returns a nonzero value.  Such acquire MO

     loads will then synchronize with the release MO store to INITIALIZED

     in do_init in res_hconf.c; see pthread_once for more detail.  */

  int initialized;

  int unused1;

  int unused2[4];

  int num_trimdomains;

  const char *trimdomain[TRIMDOMAINS_MAX];

  unsigned int flags;

#  define HCONF_FLAG_INITED	(1 << 0) /* initialized? */

#  define HCONF_FLAG_REORDER	(1 << 3) /* list best address first */

#  define HCONF_FLAG_MULTI	(1 << 4) /* see comments for gethtbyname() */

};

extern struct hconf _res_hconf;

extern void _res_hconf_init (void) attribute_hidden;

extern void _res_hconf_trim_domain (char *domain);

extern void _res_hconf_trim_domains (struct hostent *hp);

extern void _res_hconf_reorder_addrs (struct hostent *hp);

#endif /* _RES_HCONF_H_ */