| /* Macros to check if a POSIX configuration variable is defined or set. |
| |
| Copyright (C) 1991-2016 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 |