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Diffstat (limited to 'bootstrap/bmake/bit.h')
| -rw-r--r-- | bootstrap/bmake/bit.h | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/bootstrap/bmake/bit.h b/bootstrap/bmake/bit.h new file mode 100644 index 00000000000..6753471bf70 --- /dev/null +++ b/bootstrap/bmake/bit.h @@ -0,0 +1,102 @@ +/* $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 */ |