| xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame] | 1 | /* Macros to check if a POSIX configuration variable is defined or set. |
| 2 | |
| 3 | Copyright (C) 1991-2016 Free Software Foundation, Inc. |
| 4 | This file is part of the GNU C Library. |
| 5 | |
| 6 | The GNU C Library is free software; you can redistribute it and/or |
| 7 | modify it under the terms of the GNU Lesser General Public |
| 8 | License as published by the Free Software Foundation; either |
| 9 | version 2.1 of the License, or (at your option) any later version. |
| 10 | |
| 11 | The GNU C Library is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | Lesser General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU Lesser General Public |
| 17 | License along with the GNU C Library; if not, see |
| 18 | <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #ifndef _POSIX_CONF_VARS_H |
| 21 | #define _POSIX_CONF_VARS_H |
| 22 | |
| 23 | /* The script gen-posix-conf-vars.awk generates the header |
| 24 | posix-conf-vars-def.h from the list file posix-conf-vars.list and defines |
| 25 | CONF_DEF_* macros for each entry in the list file set to either of |
| 26 | CONF_DEF_UNDEFINED, CONF_DEF_DEFINED_SET or CONF_DEF_DEFINED_UNSET. To |
| 27 | check configuration variables within glibc code, use the configuration macro |
| 28 | functions instead of checking for definitions of the macros. */ |
| 29 | |
| 30 | #include <posix-conf-vars-def.h> |
| 31 | |
| 32 | #define CONF_DEF_UNDEFINED 1 |
| 33 | #define CONF_DEF_DEFINED_SET 2 |
| 34 | #define CONF_DEF_DEFINED_UNSET 3 |
| 35 | |
| 36 | /* The configuration variable is not defined. */ |
| 37 | #define CONF_IS_UNDEFINED(conf) (CONF_DEF##conf == CONF_DEF_UNDEFINED) |
| 38 | |
| 39 | /* The configuration variable is defined. It may or may not be set. */ |
| 40 | #define CONF_IS_DEFINED(conf) (CONF_DEF##conf != CONF_DEF_UNDEFINED) |
| 41 | |
| 42 | /* The configuration variable is defined and set. */ |
| 43 | #define CONF_IS_DEFINED_SET(conf) (CONF_DEF##conf == CONF_DEF_DEFINED_SET) |
| 44 | |
| 45 | /* The configuration variable is defined but not set. */ |
| 46 | #define CONF_IS_DEFINED_UNSET(conf) (CONF_DEF##conf == CONF_DEF_DEFINED_UNSET) |
| 47 | |
| 48 | #endif |