101 lines
3.6 KiB
C
101 lines
3.6 KiB
C
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/*
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* Copyright (c) 1988, 1989, 1990, 1993
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* The Regents of the University of California. All rights reserved.
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* Copyright (c) 1989 by Berkeley Softworks
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Adam de Boor.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)bit.h 8.1 (Berkeley) 6/6/93
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*/
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/*
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* bit.h --
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*
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* Definition of macros for setting and clearing bits in an array
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* of integers.
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*
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* It is assumed that "int" is 32 bits wide.
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*/
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#ifndef _BIT
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#define _BIT
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#include "sprite.h"
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#define BIT_NUM_BITS_PER_INT 32
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#define BIT_NUM_BITS_PER_BYTE 8
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#define Bit_NumInts(numBits) \
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(((numBits)+BIT_NUM_BITS_PER_INT -1)/BIT_NUM_BITS_PER_INT)
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#define Bit_NumBytes(numBits) \
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(Bit_NumInts(numBits) * sizeof(int))
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#define Bit_Alloc(numBits, bitArrayPtr) \
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bitArrayPtr = (int *)malloc((unsigned)Bit_NumBytes(numBits)); \
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Bit_Zero((numBits), (bitArrayPtr))
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#define Bit_Free(bitArrayPtr) \
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free((char *)bitArrayPtr)
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#define Bit_Set(numBits, bitArrayPtr) \
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((bitArrayPtr)[(numBits)/BIT_NUM_BITS_PER_INT] |= \
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(1 << ((numBits) % BIT_NUM_BITS_PER_INT)))
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#define Bit_IsSet(numBits, bitArrayPtr) \
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((bitArrayPtr)[(numBits)/BIT_NUM_BITS_PER_INT] & \
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(1 << ((numBits) % BIT_NUM_BITS_PER_INT)))
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#define Bit_Clear(numBits, bitArrayPtr) \
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((bitArrayPtr)[(numBits)/BIT_NUM_BITS_PER_INT] &= \
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~(1 << ((numBits) % BIT_NUM_BITS_PER_INT)))
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#define Bit_IsClear(numBits, bitArrayPtr) \
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(!(Bit_IsSet((numBits), (bitArrayPtr))))
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#define Bit_Copy(numBits, srcArrayPtr, destArrayPtr) \
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bcopy((char *)(srcArrayPtr), (char *)(destArrayPtr), \
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Bit_NumBytes(numBits))
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#define Bit_Zero(numBits, bitArrayPtr) \
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bzero((char *)(bitArrayPtr), Bit_NumBytes(numBits))
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extern int Bit_FindFirstSet();
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extern int Bit_FindFirstClear();
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extern Boolean Bit_Intersect();
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extern Boolean Bit_Union();
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extern Boolean Bit_AnySet();
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extern int *Bit_Expand();
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#endif /* _BIT */
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