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Annotation of src/usr.bin/make/bit.h, Revision 1.1

1.1     ! deraadt     1: /*     $NetBSD: bit.h,v 1.4 1995/06/14 15:18:49 christos Exp $ */
        !             2:
        !             3: /*
        !             4:  * Copyright (c) 1988, 1989, 1990 The Regents of the University of California.
        !             5:  * Copyright (c) 1988, 1989 by Adam de Boor
        !             6:  * Copyright (c) 1989 by Berkeley Softworks
        !             7:  * All rights reserved.
        !             8:  *
        !             9:  * This code is derived from software contributed to Berkeley by
        !            10:  * Adam de Boor.
        !            11:  *
        !            12:  * Redistribution and use in source and binary forms, with or without
        !            13:  * modification, are permitted provided that the following conditions
        !            14:  * are met:
        !            15:  * 1. Redistributions of source code must retain the above copyright
        !            16:  *    notice, this list of conditions and the following disclaimer.
        !            17:  * 2. Redistributions in binary form must reproduce the above copyright
        !            18:  *    notice, this list of conditions and the following disclaimer in the
        !            19:  *    documentation and/or other materials provided with the distribution.
        !            20:  * 3. All advertising materials mentioning features or use of this software
        !            21:  *    must display the following acknowledgement:
        !            22:  *     This product includes software developed by the University of
        !            23:  *     California, Berkeley and its contributors.
        !            24:  * 4. Neither the name of the University nor the names of its contributors
        !            25:  *    may be used to endorse or promote products derived from this software
        !            26:  *    without specific prior written permission.
        !            27:  *
        !            28:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            29:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            30:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            31:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            32:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            33:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            34:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            35:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            36:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            37:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            38:  * SUCH DAMAGE.
        !            39:  *
        !            40:  *     from: @(#)bit.h 5.3 (Berkeley) 6/1/90
        !            41:  */
        !            42:
        !            43: /*
        !            44:  * bit.h --
        !            45:  *
        !            46:  *     Definition of macros for setting and clearing bits in an array
        !            47:  *     of integers.
        !            48:  *
        !            49:  *     It is assumed that "int" is 32 bits wide.
        !            50:  */
        !            51:
        !            52: #ifndef _BIT
        !            53: #define _BIT
        !            54:
        !            55: #include "sprite.h"
        !            56:
        !            57: #define BIT_NUM_BITS_PER_INT   32
        !            58: #define BIT_NUM_BITS_PER_BYTE  8
        !            59:
        !            60: #define Bit_NumInts(numBits)   \
        !            61:        (((numBits)+BIT_NUM_BITS_PER_INT -1)/BIT_NUM_BITS_PER_INT)
        !            62:
        !            63: #define Bit_NumBytes(numBits)  \
        !            64:        (Bit_NumInts(numBits) * sizeof(int))
        !            65:
        !            66: #define Bit_Alloc(numBits, bitArrayPtr)        \
        !            67:         bitArrayPtr = (int *)malloc((unsigned)Bit_NumBytes(numBits)); \
        !            68:         Bit_Zero((numBits), (bitArrayPtr))
        !            69:
        !            70: #define Bit_Free(bitArrayPtr)  \
        !            71:         free((char *)bitArrayPtr)
        !            72:
        !            73: #define Bit_Set(numBits, bitArrayPtr) \
        !            74:        ((bitArrayPtr)[(numBits)/BIT_NUM_BITS_PER_INT] |= \
        !            75:                                (1 << ((numBits) % BIT_NUM_BITS_PER_INT)))
        !            76:
        !            77: #define Bit_IsSet(numBits, bitArrayPtr) \
        !            78:        ((bitArrayPtr)[(numBits)/BIT_NUM_BITS_PER_INT] & \
        !            79:                                (1 << ((numBits) % BIT_NUM_BITS_PER_INT)))
        !            80:
        !            81: #define Bit_Clear(numBits, bitArrayPtr) \
        !            82:        ((bitArrayPtr)[(numBits)/BIT_NUM_BITS_PER_INT] &= \
        !            83:                                ~(1 << ((numBits) % BIT_NUM_BITS_PER_INT)))
        !            84:
        !            85: #define Bit_IsClear(numBits, bitArrayPtr) \
        !            86:        (!(Bit_IsSet((numBits), (bitArrayPtr))))
        !            87:
        !            88: #define Bit_Copy(numBits, srcArrayPtr, destArrayPtr) \
        !            89:        bcopy((char *)(srcArrayPtr), (char *)(destArrayPtr), \
        !            90:                Bit_NumBytes(numBits))
        !            91:
        !            92: #define Bit_Zero(numBits, bitArrayPtr) \
        !            93:        bzero((char *)(bitArrayPtr), Bit_NumBytes(numBits))
        !            94:
        !            95: extern int       Bit_FindFirstSet();
        !            96: extern int       Bit_FindFirstClear();
        !            97: extern Boolean   Bit_Intersect();
        !            98: extern Boolean           Bit_Union();
        !            99: extern Boolean           Bit_AnySet();
        !           100: extern int       *Bit_Expand();
        !           101:
        !           102: #endif /* _BIT */