1/* Copyright (C) 1995,1996,1997,2000,2001,2003 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 3 4 The GNU C Library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 2.1 of the License, or (at your option) any later version. 8 9 The GNU C Library is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with the GNU C Library; if not, write to the Free 16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 17 02111-1307 USA. */ 18 19#ifndef _SYS_PARAM_H 20#define _SYS_PARAM_H 1 21 22#include <limits.h> 23#include <linux/limits.h> 24#include <linux/param.h> 25 26/* BSD names for some <limits.h> values. */ 27 28#define NBBY CHAR_BIT 29#ifndef NGROUPS 30# define NGROUPS NGROUPS_MAX 31#endif 32#define MAXSYMLINKS 20 33#define CANBSIZ MAX_CANON 34#define NCARGS ARG_MAX 35#define MAXPATHLEN PATH_MAX 36/* The following is not really correct but it is a value we used for a 37 long time and which seems to be usable. People should not use NOFILE 38 anyway. */ 39#define NOFILE 256 40 41 42#include <sys/types.h> 43 44/* Bit map related macros. */ 45#define setbit(a,i) ((a)[(i)/NBBY] |= 1<<((i)%NBBY)) 46#define clrbit(a,i) ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY))) 47#define isset(a,i) ((a)[(i)/NBBY] & (1<<((i)%NBBY))) 48#define isclr(a,i) (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0) 49 50/* Macros for counting and rounding. */ 51#ifndef howmany 52# define howmany(x, y) (((x) + ((y) - 1)) / (y)) 53#endif 54#ifdef __GNUC__ 55# define roundup(x, y) (__builtin_constant_p (y) && powerof2 (y) \ 56 ? (((x) + (y) - 1) & ~((y) - 1)) \ 57 : ((((x) + ((y) - 1)) / (y)) * (y))) 58#else 59# define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y)) 60#endif 61#define powerof2(x) ((((x) - 1) & (x)) == 0) 62 63/* Macros for min/max. */ 64#define MIN(a,b) (((a)<(b))?(a):(b)) 65#define MAX(a,b) (((a)>(b))?(a):(b)) 66 67 68/* Unit of `st_blocks'. */ 69#define DEV_BSIZE 512 70 71 72#endif /* sys/param.h */ 73