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
