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15637ed4 RG |
1 | /* |
2 | * Copyright (c) 1988, 1989, 1990 The Regents of the University of California. | |
3 | * Copyright (c) 1988, 1989 by Adam de Boor | |
4 | * Copyright (c) 1989 by Berkeley Softworks | |
5 | * All rights reserved. | |
6 | * | |
7 | * This code is derived from software contributed to Berkeley by | |
8 | * Adam de Boor. | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or without | |
11 | * modification, are permitted provided that the following conditions | |
12 | * are met: | |
13 | * 1. Redistributions of source code must retain the above copyright | |
14 | * notice, this list of conditions and the following disclaimer. | |
15 | * 2. Redistributions in binary form must reproduce the above copyright | |
16 | * notice, this list of conditions and the following disclaimer in the | |
17 | * documentation and/or other materials provided with the distribution. | |
18 | * 3. All advertising materials mentioning features or use of this software | |
19 | * must display the following acknowledgement: | |
20 | * This product includes software developed by the University of | |
21 | * California, Berkeley and its contributors. | |
22 | * 4. Neither the name of the University nor the names of its contributors | |
23 | * may be used to endorse or promote products derived from this software | |
24 | * without specific prior written permission. | |
25 | * | |
26 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
27 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
28 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
29 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
30 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
31 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
32 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
33 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
34 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
35 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
36 | * SUCH DAMAGE. | |
37 | * | |
38 | * @(#)bit.h 5.3 (Berkeley) 6/1/90 | |
39 | */ | |
40 | ||
41 | /* | |
42 | * bit.h -- | |
43 | * | |
44 | * Definition of macros for setting and clearing bits in an array | |
45 | * of integers. | |
46 | * | |
47 | * It is assumed that "int" is 32 bits wide. | |
48 | */ | |
49 | ||
50 | #ifndef _BIT | |
51 | #define _BIT | |
52 | ||
53 | #include "sprite.h" | |
54 | ||
55 | #define BIT_NUM_BITS_PER_INT 32 | |
56 | #define BIT_NUM_BITS_PER_BYTE 8 | |
57 | ||
58 | #define Bit_NumInts(numBits) \ | |
59 | (((numBits)+BIT_NUM_BITS_PER_INT -1)/BIT_NUM_BITS_PER_INT) | |
60 | ||
61 | #define Bit_NumBytes(numBits) \ | |
62 | (Bit_NumInts(numBits) * sizeof(int)) | |
63 | ||
64 | #define Bit_Alloc(numBits, bitArrayPtr) \ | |
65 | bitArrayPtr = (int *)malloc((unsigned)Bit_NumBytes(numBits)); \ | |
66 | Bit_Zero((numBits), (bitArrayPtr)) | |
67 | ||
68 | #define Bit_Free(bitArrayPtr) \ | |
69 | free((char *)bitArrayPtr) | |
70 | ||
71 | #define Bit_Set(numBits, bitArrayPtr) \ | |
72 | ((bitArrayPtr)[(numBits)/BIT_NUM_BITS_PER_INT] |= \ | |
73 | (1 << ((numBits) % BIT_NUM_BITS_PER_INT))) | |
74 | ||
75 | #define Bit_IsSet(numBits, bitArrayPtr) \ | |
76 | ((bitArrayPtr)[(numBits)/BIT_NUM_BITS_PER_INT] & \ | |
77 | (1 << ((numBits) % BIT_NUM_BITS_PER_INT))) | |
78 | ||
79 | #define Bit_Clear(numBits, bitArrayPtr) \ | |
80 | ((bitArrayPtr)[(numBits)/BIT_NUM_BITS_PER_INT] &= \ | |
81 | ~(1 << ((numBits) % BIT_NUM_BITS_PER_INT))) | |
82 | ||
83 | #define Bit_IsClear(numBits, bitArrayPtr) \ | |
84 | (!(Bit_IsSet((numBits), (bitArrayPtr)))) | |
85 | ||
86 | #define Bit_Copy(numBits, srcArrayPtr, destArrayPtr) \ | |
87 | bcopy((char *)(srcArrayPtr), (char *)(destArrayPtr), \ | |
88 | Bit_NumBytes(numBits)) | |
89 | ||
90 | #define Bit_Zero(numBits, bitArrayPtr) \ | |
91 | bzero((char *)(bitArrayPtr), Bit_NumBytes(numBits)) | |
92 | ||
93 | extern int Bit_FindFirstSet(); | |
94 | extern int Bit_FindFirstClear(); | |
95 | extern Boolean Bit_Intersect(); | |
96 | extern Boolean Bit_Union(); | |
97 | extern Boolean Bit_AnySet(); | |
98 | extern int *Bit_Expand(); | |
99 | ||
100 | #endif _BIT |