1//===----------------------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9// UNSUPPORTED: c++03, c++11, c++14
10
11// <functional>
12
13// boyer_moore searcher
14// template<class RandomAccessIterator1,
15// class Hash = hash<typename iterator_traits<RandomAccessIterator1>::value_type>,
16// class BinaryPredicate = equal_to<>>
17// class boyer_moore_searcher {
18// public:
19// boyer_moore_searcher(RandomAccessIterator1 pat_first, RandomAccessIterator1 pat_last,
20// Hash hf = Hash(), BinaryPredicate pred = BinaryPredicate());
21//
22// template<class RandomAccessIterator2>
23// pair<RandomAccessIterator2, RandomAccessIterator2>
24// operator()(RandomAccessIterator2 first, RandomAccessIterator2 last) const;
25//
26// private:
27// RandomAccessIterator1 pat_first_; // exposition only
28// RandomAccessIterator1 pat_last_; // exposition only
29// Hash hash_; // exposition only
30// BinaryPredicate pred_; // exposition only
31// };
32
33
34#include <algorithm>
35#include <cassert>
36#include <functional>
37#include <string>
38
39#include "test_macros.h"
40#include "test_iterators.h"
41
42template <typename Iter1, typename Iter2>
43void do_search(Iter1 b1, Iter1 e1, Iter2 b2, Iter2 e2, Iter1 result) {
44 std::boyer_moore_searcher<Iter2> s{b2, e2};
45 assert(result == std::search(b1, e1, s));
46}
47
48template <class Iter1, class Iter2>
49void
50test()
51{
52 int ia[] = {0, 1, 2, 3, 4, 5};
53 const unsigned sa = sizeof(ia)/sizeof(ia[0]);
54 do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia), Iter2(ia), Iter1(ia));
55 do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia), Iter2(ia+1), Iter1(ia));
56 do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia+1), Iter2(ia+2), Iter1(ia+1));
57 do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia+2), Iter2(ia+2), Iter1(ia));
58 do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia+2), Iter2(ia+3), Iter1(ia+2));
59 do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia+2), Iter2(ia+3), Iter1(ia+2));
60 do_search(Iter1(ia), Iter1(ia), Iter2(ia+2), Iter2(ia+3), Iter1(ia));
61 do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia+sa-1), Iter2(ia+sa), Iter1(ia+sa-1));
62 do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia+sa-3), Iter2(ia+sa), Iter1(ia+sa-3));
63 do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia), Iter2(ia+sa), Iter1(ia));
64 do_search(Iter1(ia), Iter1(ia+sa-1), Iter2(ia), Iter2(ia+sa), Iter1(ia+sa-1));
65 do_search(Iter1(ia), Iter1(ia+1), Iter2(ia), Iter2(ia+sa), Iter1(ia+1));
66 int ib[] = {0, 1, 2, 0, 1, 2, 3, 0, 1, 2, 3, 4};
67 const unsigned sb = sizeof(ib)/sizeof(ib[0]);
68 int ic[] = {1};
69 do_search(Iter1(ib), Iter1(ib+sb), Iter2(ic), Iter2(ic+1), Iter1(ib+1));
70 int id[] = {1, 2};
71 do_search(Iter1(ib), Iter1(ib+sb), Iter2(id), Iter2(id+2), Iter1(ib+1));
72 int ie[] = {1, 2, 3};
73 do_search(Iter1(ib), Iter1(ib+sb), Iter2(ie), Iter2(ie+3), Iter1(ib+4));
74 int ig[] = {1, 2, 3, 4};
75 do_search(Iter1(ib), Iter1(ib+sb), Iter2(ig), Iter2(ig+4), Iter1(ib+8));
76 int ih[] = {0, 1, 1, 1, 1, 2, 3, 0, 1, 2, 3, 4};
77 const unsigned sh = sizeof(ih)/sizeof(ih[0]);
78 int ii[] = {1, 1, 2};
79 do_search(Iter1(ih), Iter1(ih+sh), Iter2(ii), Iter2(ii+3), Iter1(ih+3));
80 int ij[] = {0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0};
81 const unsigned sj = sizeof(ij)/sizeof(ij[0]);
82 int ik[] = {0, 0, 0, 0, 1, 1, 1, 1, 0, 0};
83 const unsigned sk = sizeof(ik)/sizeof(ik[0]);
84 do_search(Iter1(ij), Iter1(ij+sj), Iter2(ik), Iter2(ik+sk), Iter1(ij+6));
85}
86
87template <class Iter1, class Iter2>
88void
89test2()
90{
91 char ia[] = {0, 1, 2, 3, 4, 5};
92 const unsigned sa = sizeof(ia)/sizeof(ia[0]);
93 do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia), Iter2(ia), Iter1(ia));
94 do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia), Iter2(ia+1), Iter1(ia));
95 do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia+1), Iter2(ia+2), Iter1(ia+1));
96 do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia+2), Iter2(ia+2), Iter1(ia));
97 do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia+2), Iter2(ia+3), Iter1(ia+2));
98 do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia+2), Iter2(ia+3), Iter1(ia+2));
99 do_search(Iter1(ia), Iter1(ia), Iter2(ia+2), Iter2(ia+3), Iter1(ia));
100 do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia+sa-1), Iter2(ia+sa), Iter1(ia+sa-1));
101 do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia+sa-3), Iter2(ia+sa), Iter1(ia+sa-3));
102 do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia), Iter2(ia+sa), Iter1(ia));
103 do_search(Iter1(ia), Iter1(ia+sa-1), Iter2(ia), Iter2(ia+sa), Iter1(ia+sa-1));
104 do_search(Iter1(ia), Iter1(ia+1), Iter2(ia), Iter2(ia+sa), Iter1(ia+1));
105 char ib[] = {0, 1, 2, 0, 1, 2, 3, 0, 1, 2, 3, 4};
106 const unsigned sb = sizeof(ib)/sizeof(ib[0]);
107 char ic[] = {1};
108 do_search(Iter1(ib), Iter1(ib+sb), Iter2(ic), Iter2(ic+1), Iter1(ib+1));
109 char id[] = {1, 2};
110 do_search(Iter1(ib), Iter1(ib+sb), Iter2(id), Iter2(id+2), Iter1(ib+1));
111 char ie[] = {1, 2, 3};
112 do_search(Iter1(ib), Iter1(ib+sb), Iter2(ie), Iter2(ie+3), Iter1(ib+4));
113 char ig[] = {1, 2, 3, 4};
114 do_search(Iter1(ib), Iter1(ib+sb), Iter2(ig), Iter2(ig+4), Iter1(ib+8));
115 char ih[] = {0, 1, 1, 1, 1, 2, 3, 0, 1, 2, 3, 4};
116 const unsigned sh = sizeof(ih)/sizeof(ih[0]);
117 char ii[] = {1, 1, 2};
118 do_search(Iter1(ih), Iter1(ih+sh), Iter2(ii), Iter2(ii+3), Iter1(ih+3));
119 char ij[] = {0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0};
120 const unsigned sj = sizeof(ij)/sizeof(ij[0]);
121 char ik[] = {0, 0, 0, 0, 1, 1, 1, 1, 0, 0};
122 const unsigned sk = sizeof(ik)/sizeof(ik[0]);
123 do_search(Iter1(ij), Iter1(ij+sj), Iter2(ik), Iter2(ik+sk), Iter1(ij+6));
124}
125
126void test_custom_pred() {
127 std::string long_string(1024, '0');
128 std::boyer_moore_searcher searcher(std::begin(cont&: long_string), std::end(cont&: long_string));
129 const char str[] = "1234";
130 auto ret = searcher(std::begin(arr: str), std::end(arr: str));
131 assert(ret.first == std::end(str));
132 assert(ret.second == std::end(str));
133}
134
135int main(int, char**) {
136 test<random_access_iterator<const int*>, random_access_iterator<const int*> >();
137 test2<random_access_iterator<const char*>, random_access_iterator<const char*> >();
138 test_custom_pred();
139
140 return 0;
141}
142

source code of libcxx/test/std/utilities/function.objects/func.search/func.search.bm/default.pass.cpp