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/* sys/param.h
Copyright 1996, 1997, 1998, 2002, 2003, 2007, 2009, 2011 Red Hat, Inc.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#ifndef _SYS_PARAM_H
#define _SYS_PARAM_H
#include <sys/types.h>
/* Linux includes limits.h, but this is not universally done. */
#include <limits.h>
/* Max number of open files. The Posix version is OPEN_MAX. */
/* Number of fds is virtually unlimited in cygwin, but we must provide
some reasonable value for Posix conformance */
#define NOFILE 8192
/* Max number of groups; must keep in sync with NGROUPS_MAX in limits.h */
#define NGROUPS NGROUPS_MAX
/* Ticks/second for system calls such as times() */
/* FIXME: is this the appropriate value? */
#define HZ 1000
/* Max hostname size that can be dealt with (== Win32 MAX_HOSTNAME_LEN) */
#define MAXHOSTNAMELEN 128
/* Maximum path length including trailing NUL; the Posix version is PATH_MAX.
MAXPATHLEN is the BSD variant. */
#define MAXPATHLEN PATH_MAX
/* Maximum number of nested symlinks; the Posix version is SYMLOOP_MAX.
MAXSYMLINKS is the BSD variant. */
#define MAXSYMLINKS SYMLOOP_MAX
/* This is the number of bytes per block given in the st_blocks stat member.
It should be in sync with S_BLKSIZE in sys/stat.h. S_BLKSIZE is the
BSD variant of this constant. */
#define DEV_BSIZE 1024
#ifndef NULL
#define NULL 0L
#endif
#ifndef NBBY
#define NBBY 8
#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
#define rounddown(x, y) (((x)/(y))*(y))
#define roundup(x, y) ((((x)+((y)-1))/(y))*(y)) /* to any y */
#define roundup2(x, y) (((x)+((y)-1))&(~((y)-1))) /* if y is powers of two */
#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
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