/* $NetBSD: bit.h,v 1.1.1.1 2004/03/11 13:04:01 grant 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) \ memmove((char *)(destArrayPtr), (char *)(srcArrayPtr), \ Bit_NumBytes(numBits)) #define Bit_Zero(numBits, bitArrayPtr) \ memset((char *)(bitArrayPtr), 0, 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 */