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/* Macros to check if a POSIX configuration variable is defined or set.
Copyright (C) 1991-2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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 _POSIX_CONF_VARS_H
#define _POSIX_CONF_VARS_H
/* The script gen-posix-conf-vars.awk generates the header
posix-conf-vars-def.h from the list file posix-conf-vars.list and defines
CONF_DEF_* macros for each entry in the list file set to either of
CONF_DEF_UNDEFINED, CONF_DEF_DEFINED_SET or CONF_DEF_DEFINED_UNSET. To
check configuration variables within glibc code, use the configuration macro
functions instead of checking for definitions of the macros. */
#include <posix-conf-vars-def.h>
#define CONF_DEF_UNDEFINED 1
#define CONF_DEF_DEFINED_SET 2
#define CONF_DEF_DEFINED_UNSET 3
/* The configuration variable is not defined. */
#define CONF_IS_UNDEFINED(conf) (CONF_DEF##conf == CONF_DEF_UNDEFINED)
/* The configuration variable is defined. It may or may not be set. */
#define CONF_IS_DEFINED(conf) (CONF_DEF##conf != CONF_DEF_UNDEFINED)
/* The configuration variable is defined and set. */
#define CONF_IS_DEFINED_SET(conf) (CONF_DEF##conf == CONF_DEF_DEFINED_SET)
/* The configuration variable is defined but not set. */
#define CONF_IS_DEFINED_UNSET(conf) (CONF_DEF##conf == CONF_DEF_DEFINED_UNSET)
#endif
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