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Sprite 1984 - 1993
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Bit_AnySet.c
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C/C++ Source or Header
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1990-08-26
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2KB
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64 lines
/*
* Bit_FindFirstClear.c --
*
* Source code for the Bit_FindFirstClear library procedure.
*
* Copyright 1988 Regents of the University of California
* Permission to use, copy, modify, and distribute this
* software and its documentation for any purpose and without
* fee is hereby granted, provided that the above copyright
* notice appear in all copies. The University of California
* makes no representations about the suitability of this
* software for any purpose. It is provided "as is" without
* express or implied warranty.
*/
#ifndef lint
static char rcsid[] = "$Header: /sprite/src/lib/c/bit/RCS/Bit_AnySet.c,v 1.1 88/06/19 14:34:46 ouster Exp $ SPRITE (Berkeley)";
#endif not lint
#include <sprite.h>
#include "bit.h"
#include "bitInt.h"
/*-
*-----------------------------------------------------------------------
*
* Bit_AnySet --
*
* See if any bit in the mask is set
*
* Results:
* TRUE if one or more bit(s) is(are) set.
*
* Side Effects:
* None.
*
*-----------------------------------------------------------------------
*/
Boolean
Bit_AnySet(numBits, maskPtr)
int numBits; /* Number of bits in array */
register int *maskPtr; /* The array of bits */
{
register int i;
register int lastMask;
GET_MASK_AND_INTS(numBits, i, lastMask);
while (i != 0) {
if (*maskPtr) {
return (TRUE);
}
i--; maskPtr++;
}
if (lastMask && (*maskPtr & lastMask)) {
return (TRUE);
} else {
return (FALSE);
}
}