Bullet Collision Detection & Physics Library: gim_bitset.h Source File

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gim_bitset.h
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1 #ifndef GIM_BITSET_H_INCLUDED
2 #define GIM_BITSET_H_INCLUDED
3
6 /*
7 -----------------------------------------------------------------------------
8 This source file is part of GIMPACT Library.
9
10 For the latest info, see http://gimpact.sourceforge.net/
11
12 Copyright (c) 2006 Francisco Leon Najera. C.C. 80087371.
13 email: projectileman@yahoo.com
14
15 This library is free software; you can redistribute it and/or
16 modify it under the terms of EITHER:
17 (1) The GNU Lesser General Public License as published by the Free
18 Software Foundation; either version 2.1 of the License, or (at
19 your option) any later version. The text of the GNU Lesser
20 General Public License is included with this library in the
21 file GIMPACT-LICENSE-LGPL.TXT.
22 (2) The BSD-style license that is included with this library in
23 the file GIMPACT-LICENSE-BSD.TXT.
24 (3) The zlib/libpng license that is included with this library in
25 the file GIMPACT-LICENSE-ZLIB.TXT.
26
27 This library is distributed in the hope that it will be useful,
28 but WITHOUT ANY WARRANTY; without even the implied warranty of
29 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the files
30 GIMPACT-LICENSE-LGPL.TXT, GIMPACT-LICENSE-ZLIB.TXT and GIMPACT-LICENSE-BSD.TXT for more details.
31
32 -----------------------------------------------------------------------------
33 */
34
35 #include "gim_array.h"
36
37
38 #define GUINT_BIT_COUNT 32
39 #define GUINT_EXPONENT 5
40
41 class gim_bitset
42 {
43 public:
44 gim_array<GUINT> m_container;
45
46 gim_bitset()
47 {
48
49 }
50
51 gim_bitset(GUINT bits_count)
52 {
53 resize(bits_count);
54 }
55
56 ~gim_bitset()
57 {
58 }
59
60 inline bool resize(GUINT newsize)
61 {
62 GUINT oldsize = m_container.size();
63 m_container.resize(newsize/GUINT_BIT_COUNT + 1,false);
64 while(oldsize<m_container.size())
65 {
66 m_container[oldsize] = 0;
67 }
68 return true;
69 }
70
71 inline GUINT size()
72 {
73 return m_container.size()*GUINT_BIT_COUNT;
74 }
75
76 inline void set_all()
77 {
78 for(GUINT i = 0;i<m_container.size();++i)
79 {
80 m_container[i] = 0xffffffff;
81 }
82 }
83
84 inline void clear_all()
85 {
86 for(GUINT i = 0;i<m_container.size();++i)
87 {
88 m_container[i] = 0;
89 }
90 }
91
92 inline void set(GUINT bit_index)
93 {
94 if(bit_index>=size())
95 {
96 resize(bit_index);
97 }
98 m_container[bit_index >> GUINT_EXPONENT] |= (1 << (bit_index & (GUINT_BIT_COUNT-1)));
99 }
100
102 inline char get(GUINT bit_index)
103 {
104 if(bit_index>=size())
105 {
106 return 0;
107 }
108 char value = m_container[bit_index >> GUINT_EXPONENT] &
109 (1 << (bit_index & (GUINT_BIT_COUNT-1)));
110 return value;
111 }
112
113 inline void clear(GUINT bit_index)
114 {
115 m_container[bit_index >> GUINT_EXPONENT] &= ~(1 << (bit_index & (GUINT_BIT_COUNT-1)));
116 }
117 };
118
119
120
121
122
123 #endif // GIM_CONTAINERS_H_INCLUDED
gim_bitset::gim_bitset
gim_bitset()
Definition: gim_bitset.h:46
gim_bitset::clear
void clear(GUINT bit_index)
Definition: gim_bitset.h:113
gim_bitset::set_all
void set_all()
Definition: gim_bitset.h:76
GUINT_BIT_COUNT
#define GUINT_BIT_COUNT
Definition: gim_bitset.h:38
gim_array::resize
void resize(GUINT size, bool call_constructor=true, const T &fillData=T())
Definition: gim_array.h:288
gim_bitset::m_container
gim_array< GUINT > m_container
Definition: gim_bitset.h:44
gim_array< GUINT >
gim_array.h
gim_bitset::size
GUINT size()
Definition: gim_bitset.h:71
gim_bitset::resize
bool resize(GUINT newsize)
Definition: gim_bitset.h:60
gim_bitset::clear_all
void clear_all()
Definition: gim_bitset.h:84
gim_bitset::set
void set(GUINT bit_index)
Definition: gim_bitset.h:92
gim_bitset
Definition: gim_bitset.h:41
GUINT
#define GUINT
Definition: gim_math.h:42
gim_bitset::~gim_bitset
~gim_bitset()
Definition: gim_bitset.h:56
gim_bitset::gim_bitset
gim_bitset(GUINT bits_count)
Definition: gim_bitset.h:51
gim_array::size
GUINT size() const
Definition: gim_array.h:144
GUINT_EXPONENT
#define GUINT_EXPONENT
Definition: gim_bitset.h:39