BitMagic-C++
sample2.cpp
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1/*
2Copyright(c) 2002-2017 Anatoliy Kuznetsov(anatoliy_kuznetsov at yahoo.com)
3
4Licensed under the Apache License, Version 2.0 (the "License");
5you may not use this file except in compliance with the License.
6You may obtain a copy of the License at
7
8 http://www.apache.org/licenses/LICENSE-2.0
9
10Unless required by applicable law or agreed to in writing, software
11distributed under the License is distributed on an "AS IS" BASIS,
12WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13See the License for the specific language governing permissions and
14limitations under the License.
15
16For more information please visit: http://bitmagic.io
17*/
18
19/** \example sample2.cpp
20 Example demonstrates using set operations AND, OR, XOR, etc.
21 \sa bvsetalgebra.cpp
22*/
23
24/*! \file sample2.cpp
25 \brief Example: bvector<> set algebra operations AND, OR, XOR, etc.
26*/
27
28#include <iostream>
29#include "bm.h"
30
31using namespace std;
32
33static
35{
37 do
38 {
39 cout << value;
40 value = bv.get_next(value);
41 if (value)
42 {
43 cout << ",";
44 }
45 else
46 {
47 break;
48 }
49 } while(1);
50 cout << endl;
51}
52
53int main(void)
54{
55 try
56 {
57 bm::bvector<> bv1;
58 bm::bvector<> bv2;
59 bm::bvector<> bv3;
60
61 bv1.set(10);
62 bv1.set(100);
63 bv1.set(1000000);
64
65
66 bv2.set(10);
67 bv2.set(100);
68
69 // Logical AND operation on bv2 (bv1 is the argument)
70 // bv2 = bv2 AND bv1
71
72 bv3 = bv1 & bv2;
73 print_bvector(bv3);
74
75 bv2 &= bv1; // You also can use: bv2.bit_and(bv1);
76 print_bvector(bv2);
77
78 // bv2 = bv2 OR bv1
79
80 bv3 = bv1 | bv2;
81 print_bvector(bv3);
82
83 bv2 |= bv1; // You can also use: bv2.bit_or(bv1);
84 print_bvector(bv2);
85
86
87 bv1.set(1000000, false);
88
89 // bv2 = bv2 SUB bv1
90
91 bv3 = bv2 - bv1;
92 print_bvector(bv3);
93
94 bv2 -= bv1; // You can also use: bv2.bit_sub(bv1);
95 print_bvector(bv2);
96
97 // bv2 XOR bv1
98
99 bv3 = bv2 ^ bv1;
100 print_bvector(bv3);
101
102 // product of XOR is a mismatch vector (definition of XOR)
103 //
104 {
106 bool f = bv3.find(pos);
107 if (f)
108 {
109 cout << "XOR mismatch position = " << pos << endl;
110 }
111
112 // if we need to find only first mismatch we don't need a full
113 // XOR product, we can use bvector<>::find_first_mismatch()
114 //
115 f = bv2.find_first_mismatch(bv1, pos);
116 if (f)
117 {
118 cout << "search mismatch position = " << pos << endl;
119 }
120 }
121
122 bv2 ^= bv1; // You can also use: bv2.bit_xor(bv1);
123 print_bvector(bv2);
124
125 // For lexicographical comparison there is set of overloaded
126 // operators and function compare (see also bvector<>::equal() )
127
128 if (bv2 == bv3)
129 {
130 cerr << "Equivalent. Comparison result = "
131 << bv2.compare(bv3) << endl;
132 }
133 else
134 {
135 cout << "Error." << endl;
136 return 1;
137 }
138 }
139 catch(std::exception& ex)
140 {
141 std::cerr << ex.what() << std::endl;
142 }
143
144
145 return 0;
146}
Compressed bit-vector bvector<> container, set algebraic methods, traversal iterators.
Bitvector Bit-vector container with runtime compression of bits.
Definition bm.h:108
bool find(size_type &pos) const BMNOEXCEPT
Finds index of first 1 bit.
Definition bm.h:4035
size_type get_next(size_type prev) const BMNOEXCEPT
Finds the number of the next bit ON.
Definition bm.h:1540
bm::id_t size_type
Definition bm.h:117
bvector< Alloc > & set(size_type n, bool val=true)
Sets bit n if val is true, clears bit n if val is false.
Definition bm.h:3581
bool find_first_mismatch(const bvector< Alloc > &bvect, size_type &pos, size_type search_to=bm::id_max) const BMNOEXCEPT
Find index of first bit different between this and the agr vector.
Definition bm.h:3277
size_type get_first() const BMNOEXCEPT
find first 1 bit in vector. Function may return 0 and this requires an extra check if bit 0 is actual...
Definition bm.h:1531
int compare(const bvector< Alloc > &bvect) const BMNOEXCEPT
Lexicographical comparison with a bitvector.
Definition bm.h:3159
int main(void)
Definition sample2.cpp:53
static void print_bvector(const bm::bvector<> &bv)
Definition sample2.cpp:34