sysdeps/unix/sysv/linux/sys/param.h

   1 /* Copyright (C) 1995, 1996, 1997 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 Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    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    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 #ifndef _SYS_PARAM_H
  20
  21 #define _SYS_PARAM_H    1
  22
  23 #include <limits.h>
  24 #include <linux/limits.h>
  25 #include <linux/param.h>
  26
  27 /* BSD names for some <limits.h> values.  */
  28
  29 #define NBBY            CHAR_BIT
  30 #ifndef NGROUPS
  31 # define NGROUPS                NGROUPS_MAX
  32 #endif
  33 #define MAXSYMLINKS     5
  34 #define CANBSIZ         MAX_CANON
  35 #define NCARGS          ARG_MAX
  36 #define MAXPATHLEN      PATH_MAX
  37 #define NOFILE          OPEN_MAX
  38
  39
  40 #include <sys/types.h>
  41
  42 /* Bit map related macros.  */
  43 #define setbit(a,i)     ((a)[(i)/NBBY] |= 1<<((i)%NBBY))
  44 #define clrbit(a,i)     ((a)[(i)/NBBY] &= ~(1<<((i)%NBBY)))
  45 #define isset(a,i)      ((a)[(i)/NBBY] & (1<<((i)%NBBY)))
  46 #define isclr(a,i)      (((a)[(i)/NBBY] & (1<<((i)%NBBY))) == 0)
  47
  48 /* Macros for counting and rounding.  */
  49 #ifndef howmany
  50 # define howmany(x, y)  (((x)+((y)-1))/(y))
  51 #endif
  52 #define roundup(x, y)   ((((x)+((y)-1))/(y))*(y))
  53 #define powerof2(x)     ((((x)-1)&(x))==0)
  54
  55 /* Macros for min/max.  */
  56 #define MIN(a,b) (((a)<(b))?(a):(b))
  57 #define MAX(a,b) (((a)>(b))?(a):(b))
  58
  59
  60 /* Unit of `st_blocks'.  */
  61 #define DEV_BSIZE       512
  62
  63
  64 #endif  /* sys/param.h */