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/* $OpenBSD: bit.h,v 1.4 1996/11/30 21:08:50 millert Exp $ */
/* $NetBSD: bit.h,v 1.5 1995/11/08 02:30:53 christos Exp $ */
/*
* Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
* Copyright (c) 1988, 1989 by Adam de Boor
* Copyright (c) 1989 by Berkeley Softworks
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Adam de Boor.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: @(#)bit.h 5.3 (Berkeley) 6/1/90
*/
/*
* bit.h --
*
* Definition of macros for setting and clearing bits in an array
* of integers.
*
* It is assumed that "int" is 32 bits wide.
*/
#ifndef _BIT
#define _BIT
#include "sprite.h"
#define BIT_NUM_BITS_PER_INT 32
#define BIT_NUM_BITS_PER_BYTE 8
#define Bit_NumInts(numBits) \
(((numBits)+BIT_NUM_BITS_PER_INT -1)/BIT_NUM_BITS_PER_INT)
#define Bit_NumBytes(numBits) \
(Bit_NumInts(numBits) * sizeof(int))
#define Bit_Alloc(numBits, bitArrayPtr) \
bitArrayPtr = (int *) emalloc((unsigned)Bit_NumBytes(numBits)); \
Bit_Zero((numBits), (bitArrayPtr))
#define Bit_Free(bitArrayPtr) \
free((char *)bitArrayPtr)
#define Bit_Set(numBits, bitArrayPtr) \
((bitArrayPtr)[(numBits)/BIT_NUM_BITS_PER_INT] |= \
(1 << ((numBits) % BIT_NUM_BITS_PER_INT)))
#define Bit_IsSet(numBits, bitArrayPtr) \
((bitArrayPtr)[(numBits)/BIT_NUM_BITS_PER_INT] & \
(1 << ((numBits) % BIT_NUM_BITS_PER_INT)))
#define Bit_Clear(numBits, bitArrayPtr) \
((bitArrayPtr)[(numBits)/BIT_NUM_BITS_PER_INT] &= \
~(1 << ((numBits) % BIT_NUM_BITS_PER_INT)))
#define Bit_IsClear(numBits, bitArrayPtr) \
(!(Bit_IsSet((numBits), (bitArrayPtr))))
#define Bit_Copy(numBits, srcArrayPtr, destArrayPtr) \
bcopy((char *)(srcArrayPtr), (char *)(destArrayPtr), \
Bit_NumBytes(numBits))
#define Bit_Zero(numBits, bitArrayPtr) \
bzero((char *)(bitArrayPtr), Bit_NumBytes(numBits))
extern int Bit_FindFirstSet();
extern int Bit_FindFirstClear();
extern Boolean Bit_Intersect();
extern Boolean Bit_Union();
extern Boolean Bit_AnySet();
extern int *Bit_Expand();
#endif /* _BIT */
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