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Diffstat (limited to 'posix/posix-conf-vars.h')
| -rw-r--r-- | posix/posix-conf-vars.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/posix/posix-conf-vars.h b/posix/posix-conf-vars.h new file mode 100644 index 0000000000..6faf29f56b --- /dev/null +++ b/posix/posix-conf-vars.h @@ -0,0 +1,48 @@ +/* Macros to check if a POSIX configuration variable is defined or set. + + Copyright (C) 1991-2014 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 |