mirror of
git://sourceware.org/git/glibc.git
synced 2024-11-21 01:12:26 +08:00
104 lines
3.0 KiB
C
104 lines
3.0 KiB
C
/* Compatibility header for old-style Unix parameters and limits.
|
|
Copyright (C) 1995-2015 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
|
|
#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 */
|