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* include/sys/param.h (NBBY): Define if not defined.

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* include/sys/param.h (setbit): Add new bitmap related macro.
	(clrbit): Likewise.
	(isset): Likewise.
	(isclr): Likewise.
	(howmany): Add new counting/rounding macro.
	(rounddown): Likewise.
	(roundup): Likewise.
	(roundup2): Likewise.
	(powerof2): Likewise
	(MIN): Add macro for calculating min.
	(MAX): Add macro for calculating max.
This commit is contained in:
Corinna Vinschen
2003-08-12 10:23:40 +00:00
parent 6c7560c901
commit c86c10b803
2 changed files with 41 additions and 0 deletions
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23
winsup/cygwin/include/sys/param.h
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@ -53,4 +53,27 @@
#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