#ifndef __CARES_RULES_H

#define __CARES_RULES_H

/* Copyright (C) 2009 by Daniel Stenberg et al

 *

 * Permission to use, copy, modify, and distribute this software and its

 * documentation for any purpose and without fee is hereby granted, provided

 * that the above copyright notice appear in all copies and that both that

 * copyright notice and this permission notice appear in supporting

 * documentation, and that the name of M.I.T. not be used in advertising or

 * publicity pertaining to distribution of the software without specific,

 * written prior permission.  M.I.T. makes no representations about the

 * suitability of this software for any purpose.  It is provided "as is"

 * without express or implied warranty.

 */

/* ================================================================ */

/*                    COMPILE TIME SANITY CHECKS                    */

/* ================================================================ */

/*

 * NOTE 1:

 * -------

 *

 * All checks done in this file are intentionally placed in a public

 * header file which is pulled by ares.h when an application is

 * being built using an already built c-ares library. Additionally

 * this file is also included and used when building the library.

 *

 * If compilation fails on this file it is certainly sure that the

 * problem is elsewhere. It could be a problem in the ares_build.h

 * header file, or simply that you are using different compilation

 * settings than those used to build the library.

 *

 * Nothing in this file is intended to be modified or adjusted by the

 * c-ares library user nor by the c-ares library builder.

 *

 * Do not deactivate any check, these are done to make sure that the

 * library is properly built and used.

 *

 * You can find further help on the c-ares development mailing list:

 * http://cool.haxx.se/mailman/listinfo/c-ares/

 *

 * NOTE 2

 * ------

 *

 * Some of the following compile time checks are based on the fact

 * that the dimension of a constant array can not be a negative one.

 * In this way if the compile time verification fails, the compilation

 * will fail issuing an error. The error description wording is compiler

 * dependent but it will be quite similar to one of the following:

 *

 *   "negative subscript or subscript is too large"

 *   "array must have at least one element"

 *   "-1 is an illegal array size"

 *   "size of array is negative"

 *

 * If you are building an application which tries to use an already

 * built c-ares library and you are getting this kind of errors on

 * this file, it is a clear indication that there is a mismatch between

 * how the library was built and how you are trying to use it for your

 * application. Your already compiled or binary library provider is the

 * only one who can give you the details you need to properly use it.

 */

/*

 * Verify that some macros are actually defined.

 */

#ifndef CARES_TYPEOF_ARES_SOCKLEN_T

#  error "CARES_TYPEOF_ARES_SOCKLEN_T definition is missing!"

   Error Compilation_aborted_CARES_TYPEOF_ARES_SOCKLEN_T_is_missing

#endif

/*

 * Macros private to this header file.

 */

#define CareschkszEQ(t, s) sizeof(t) == s ? 1 : -1

#define CareschkszGE(t1, t2) sizeof(t1) >= sizeof(t2) ? 1 : -1

/*

 * Verify that the size previously defined and expected for

 * ares_socklen_t is actually the the same as the one reported

 * by sizeof() at compile time.

 */

typedef char

  __cares_rule_02__

    [CareschkszEQ(ares_socklen_t, sizeof(CARES_TYPEOF_ARES_SOCKLEN_T))];

/*

 * Verify at compile time that the size of ares_socklen_t as reported

 * by sizeof() is greater or equal than the one reported for int for

 * the current compilation.

 */

typedef char

  __cares_rule_03__

    [CareschkszGE(ares_socklen_t, int)];

/* ================================================================ */

/*          EXTERNALLY AND INTERNALLY VISIBLE DEFINITIONS           */

/* ================================================================ */

/*

 * Get rid of macros private to this header file.

 */

#undef CareschkszEQ

#undef CareschkszGE

/*

 * Get rid of macros not intended to exist beyond this point.

 */

#undef CARES_PULL_WS2TCPIP_H

#undef CARES_PULL_SYS_TYPES_H

#undef CARES_PULL_SYS_SOCKET_H

#undef CARES_TYPEOF_ARES_SOCKLEN_T

#endif /* __CARES_RULES_H */