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- /*
- * 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.
- *
- * @(#)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 *)malloc((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
-