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- /* Compatibility header for old-style Unix parameters and limits.
- Copyright (C) 1995-2016 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 _SYS_PARAM_H
- #define _SYS_PARAM_H 1
- #define __need_NULL
- #include <stddef.h>
- #include <sys/types.h>
- #include <limits.h>
- #include <endian.h> /* Define BYTE_ORDER et al. */
- #include <signal.h> /* Define NSIG. */
- /* This file defines some things in system-specific ways. */
- #include <bits/param.h>
- /* BSD names for some <limits.h> values. */
- #define NBBY CHAR_BIT
- #if !defined NGROUPS && defined NGROUPS_MAX
- # define NGROUPS NGROUPS_MAX
- #endif
- #if !defined MAXSYMLINKS && defined SYMLOOP_MAX
- # define MAXSYMLINKS SYMLOOP_MAX
- #endif
- #if !defined CANBSIZ && defined MAX_CANON
- # define CANBSIZ MAX_CANON
- #endif
- #if !defined MAXPATHLEN && defined PATH_MAX
- # define MAXPATHLEN PATH_MAX
- #endif
- #if !defined NOFILE && defined OPEN_MAX
- # define NOFILE OPEN_MAX
- #endif
- #if !defined MAXHOSTNAMELEN && defined HOST_NAME_MAX
- # define MAXHOSTNAMELEN HOST_NAME_MAX
- #endif
- #ifndef NCARGS
- # ifdef ARG_MAX
- # define NCARGS ARG_MAX
- # else
- /* ARG_MAX is unlimited, but we define NCARGS for BSD programs that want to
- compare against some fixed limit. */
- # define NCARGS INT_MAX
- # endif
- #endif
- /* Magical constants. */
- #ifndef NOGROUP
- # define NOGROUP 65535 /* Marker for empty group set member. */
- #endif
- #ifndef NODEV
- # define NODEV ((dev_t) -1) /* Non-existent device. */
- #endif
- /* Unit of `st_blocks'. */
- #ifndef DEV_BSIZE
- # define DEV_BSIZE 512
- #endif
- /* Bit map related macros. */
- #define setbit(a,i) ((a)[(i)/NBBY] |= 1<<((i)%NBBY))
- #define clrbit(a,i) ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY)))
- #define isset(a,i) ((a)[(i)/NBBY] & (1<<((i)%NBBY)))
- #define isclr(a,i) (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0)
- /* Macros for counting and rounding. */
- #ifndef howmany
- # define howmany(x, y) (((x) + ((y) - 1)) / (y))
- #endif
- #ifdef __GNUC__
- # define roundup(x, y) (__builtin_constant_p (y) && powerof2 (y) \
- ? (((x) + (y) - 1) & ~((y) - 1)) \
- : ((((x) + ((y) - 1)) / (y)) * (y)))
- #else
- # define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y))
- #endif
- #define powerof2(x) ((((x) - 1) & (x)) == 0)
- /* Macros for min/max. */
- #define MIN(a,b) (((a)<(b))?(a):(b))
- #define MAX(a,b) (((a)>(b))?(a):(b))
- #endif /* sys/param.h */
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