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1 | ///////////////////////////////////////////////////////////////////////////// | |
2 | // Name: wx/flags.h | |
3 | // Purpose: a bitset suited for replacing the current style flags | |
4 | // Author: Stefan Csomor | |
5 | // Modified by: | |
6 | // Created: 27/07/03 | |
7 | // Copyright: (c) 2003 Stefan Csomor | |
8 | // Licence: wxWindows licence | |
9 | ///////////////////////////////////////////////////////////////////////////// | |
10 | ||
11 | #ifndef _WX_SETH__ | |
12 | #define _WX_SETH__ | |
13 | ||
14 | // wxBitset should be applied to an enum, then this can be used like | |
15 | // bitwise operators but keeps the type safety and information, the | |
16 | // enums must be in a sequence , their value determines the bit position | |
17 | // that they represent | |
18 | // The api is made as close as possible to <bitset> | |
19 | ||
20 | template <class T> class wxBitset | |
21 | { | |
22 | friend class wxEnumData ; | |
23 | public: | |
24 | // creates a wxBitset<> object with all flags initialized to 0 | |
25 | wxBitset() { m_data = 0; } | |
26 | ||
27 | // created a wxBitset<> object initialized according to the bits of the | |
28 | // integral value val | |
29 | wxBitset(unsigned long val) { m_data = val ; } | |
30 | ||
31 | // copies the content in the new wxBitset<> object from another one | |
32 | wxBitset(const wxBitset &src) { m_data = src.m_data; } | |
33 | ||
34 | // creates a wxBitset<> object that has the specific flag set | |
35 | wxBitset(const T el) { m_data |= 1 << el; } | |
36 | ||
37 | // returns the integral value that the bits of this object represent | |
38 | unsigned long to_ulong() const { return m_data ; } | |
39 | ||
40 | // assignment | |
41 | wxBitset &operator =(const wxBitset &rhs) | |
42 | { | |
43 | m_data = rhs.m_data; | |
44 | return *this; | |
45 | } | |
46 | ||
47 | // bitwise or operator, sets all bits that are in rhs and leaves | |
48 | // the rest unchanged | |
49 | wxBitset &operator |=(const wxBitset &rhs) | |
50 | { | |
51 | m_data |= rhs.m_data; | |
52 | return *this; | |
53 | } | |
54 | ||
55 | // bitwsie exclusive-or operator, toggles the value of all bits | |
56 | // that are set in bits and leaves all others unchanged | |
57 | wxBitset &operator ^=(const wxBitset &rhs) // difference | |
58 | { | |
59 | m_data ^= rhs.m_data; | |
60 | return *this; | |
61 | } | |
62 | ||
63 | // bitwise and operator, resets all bits that are not in rhs and leaves | |
64 | // all others unchanged | |
65 | wxBitset &operator &=(const wxBitset &rhs) // intersection | |
66 | { | |
67 | m_data &= rhs.m_data; | |
68 | return *this; | |
69 | } | |
70 | ||
71 | // bitwise or operator, returns a new bitset that has all bits set that set are in | |
72 | // bitset2 or in this bitset | |
73 | wxBitset operator |(const wxBitset &bitset2) const // union | |
74 | { | |
75 | wxBitset<T> s; | |
76 | s.m_data = m_data | bitset2.m_data; | |
77 | return s; | |
78 | } | |
79 | ||
80 | // bitwise exclusive-or operator, returns a new bitset that has all bits set that are set either in | |
81 | // bitset2 or in this bitset but not in both | |
82 | wxBitset operator ^(const wxBitset &bitset2) const // difference | |
83 | { | |
84 | wxBitset<T> s; | |
85 | s.m_data = m_data ^ bitset2.m_data; | |
86 | return s; | |
87 | } | |
88 | ||
89 | // bitwise and operator, returns a new bitset that has all bits set that are set both in | |
90 | // bitset2 and in this bitset | |
91 | wxBitset operator &(const wxBitset &bitset2) const // intersection | |
92 | { | |
93 | wxBitset<T> s; | |
94 | s.m_data = m_data & bitset2.m_data; | |
95 | return s; | |
96 | } | |
97 | ||
98 | // sets appropriate the bit to true | |
99 | wxBitset& set(const T el) //Add element | |
100 | { | |
101 | m_data |= 1 << el; | |
102 | return *this; | |
103 | } | |
104 | ||
105 | // clears the appropriate flag to false | |
106 | wxBitset& reset(const T el) //remove element | |
107 | { | |
108 | m_data &= ~(1 << el); | |
109 | return *this; | |
110 | } | |
111 | ||
112 | // clear all flags | |
113 | wxBitset& reset() | |
114 | { | |
115 | m_data = 0; | |
116 | return *this; | |
117 | } | |
118 | ||
119 | // true if this flag is set | |
120 | bool test(const T el) const | |
121 | { | |
122 | return (m_data & (1 << el)) ? true : false; | |
123 | } | |
124 | ||
125 | // true if no flag is set | |
126 | bool none() const | |
127 | { | |
128 | return m_data == 0; | |
129 | } | |
130 | ||
131 | // true if any flag is set | |
132 | bool any() const | |
133 | { | |
134 | return m_data != 0; | |
135 | } | |
136 | ||
137 | // true if both have the same flags | |
138 | bool operator ==(const wxBitset &rhs) const | |
139 | { | |
140 | return m_data == rhs.m_data; | |
141 | } | |
142 | ||
143 | // true if both differ in their flags set | |
144 | bool operator !=(const wxBitset &rhs) const | |
145 | { | |
146 | return !operator==(rhs); | |
147 | } | |
148 | ||
149 | bool operator[] (const T el) const { return test(el) ; } | |
150 | ||
151 | private : | |
152 | unsigned long m_data; | |
153 | }; | |
154 | ||
155 | #if wxUSE_EXTENDED_RTTI | |
156 | ||
157 | #define wxDEFINE_FLAGS( flags ) \ | |
158 | class WXDLLIMPEXP_BASE flags \ | |
159 | {\ | |
160 | public : \ | |
161 | flags(long data=0) :m_data(data) {} \ | |
162 | long m_data ;\ | |
163 | bool operator ==(const flags &rhs) const { return m_data == rhs.m_data; }\ | |
164 | } ; | |
165 | ||
166 | #else | |
167 | ||
168 | #define wxDEFINE_FLAGS( flags ) | |
169 | ||
170 | #endif | |
171 | ||
172 | #if WXWIN_COMPATIBILITY_2_8 | |
173 | #define WX_DEFINE_FLAGS wxDEFINE_FLAGS | |
174 | #endif | |
175 | ||
176 | #endif |