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cxx/test/std/experimental/func/func.searchers/func.searchers.boyer_moore/default.pass.cpp
Marshall Clow af9a44f256 Implementation of Boyer-Moore and Boyer-Moore-Horspool searchers for the LFTS. 
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@247036 91177308-0d34-0410-b5e6-96231b3b80d8
2015-09-08 17:59:09 +00:00

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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03, c++11
// <functional>
// boyer_moore searcher
// template<class RandomAccessIterator1,
// class Hash = hash<typename iterator_traits<RandomAccessIterator1>::value_type>,
// class BinaryPredicate = equal_to<>>
// class boyer_moore_searcher {
// public:
// boyer_moore_searcher(RandomAccessIterator1 pat_first, RandomAccessIterator1 pat_last,
// Hash hf = Hash(), BinaryPredicate pred = BinaryPredicate());
//
// template<class RandomAccessIterator2>
// RandomAccessIterator2
// operator()(RandomAccessIterator2 first, RandomAccessIterator2 last) const;
//
// private:
// RandomAccessIterator1 pat_first_; // exposition only
// RandomAccessIterator1 pat_last_; // exposition only
// Hash hash_; // exposition only
// BinaryPredicate pred_; // exposition only
// };
#include <experimental/algorithm>
#include <experimental/functional>
#include <cassert>
#include "test_iterators.h"
template <typename Iter1, typename Iter2>
void do_search(Iter1 b1, Iter1 e1, Iter2 b2, Iter2 e2, Iter1 result) {
std::experimental::boyer_moore_searcher<Iter2> s{b2, e2};
assert(result == std::experimental::search(b1, e1, s));
}
template <class Iter1, class Iter2>
void
test()
{
int ia[] = {0, 1, 2, 3, 4, 5};
const unsigned sa = sizeof(ia)/sizeof(ia[0]);
do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia), Iter2(ia), Iter1(ia));
do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia), Iter2(ia+1), Iter1(ia));
do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia+1), Iter2(ia+2), Iter1(ia+1));
do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia+2), Iter2(ia+2), Iter1(ia));
do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia+2), Iter2(ia+3), Iter1(ia+2));
do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia+2), Iter2(ia+3), Iter1(ia+2));
do_search(Iter1(ia), Iter1(ia), Iter2(ia+2), Iter2(ia+3), Iter1(ia));
do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia+sa-1), Iter2(ia+sa), Iter1(ia+sa-1));
do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia+sa-3), Iter2(ia+sa), Iter1(ia+sa-3));
do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia), Iter2(ia+sa), Iter1(ia));
do_search(Iter1(ia), Iter1(ia+sa-1), Iter2(ia), Iter2(ia+sa), Iter1(ia+sa-1));
do_search(Iter1(ia), Iter1(ia+1), Iter2(ia), Iter2(ia+sa), Iter1(ia+1));
int ib[] = {0, 1, 2, 0, 1, 2, 3, 0, 1, 2, 3, 4};
const unsigned sb = sizeof(ib)/sizeof(ib[0]);
int ic[] = {1};
do_search(Iter1(ib), Iter1(ib+sb), Iter2(ic), Iter2(ic+1), Iter1(ib+1));
int id[] = {1, 2};
do_search(Iter1(ib), Iter1(ib+sb), Iter2(id), Iter2(id+2), Iter1(ib+1));
int ie[] = {1, 2, 3};
do_search(Iter1(ib), Iter1(ib+sb), Iter2(ie), Iter2(ie+3), Iter1(ib+4));
int ig[] = {1, 2, 3, 4};
do_search(Iter1(ib), Iter1(ib+sb), Iter2(ig), Iter2(ig+4), Iter1(ib+8));
int ih[] = {0, 1, 1, 1, 1, 2, 3, 0, 1, 2, 3, 4};
const unsigned sh = sizeof(ih)/sizeof(ih[0]);
int ii[] = {1, 1, 2};
do_search(Iter1(ih), Iter1(ih+sh), Iter2(ii), Iter2(ii+3), Iter1(ih+3));
int ij[] = {0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0};
const unsigned sj = sizeof(ij)/sizeof(ij[0]);
int ik[] = {0, 0, 0, 0, 1, 1, 1, 1, 0, 0};
const unsigned sk = sizeof(ik)/sizeof(ik[0]);
do_search(Iter1(ij), Iter1(ij+sj), Iter2(ik), Iter2(ik+sk), Iter1(ij+6));
}
template <class Iter1, class Iter2>
void
test2()
{
char ia[] = {0, 1, 2, 3, 4, 5};
const unsigned sa = sizeof(ia)/sizeof(ia[0]);
do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia), Iter2(ia), Iter1(ia));
do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia), Iter2(ia+1), Iter1(ia));
do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia+1), Iter2(ia+2), Iter1(ia+1));
do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia+2), Iter2(ia+2), Iter1(ia));
do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia+2), Iter2(ia+3), Iter1(ia+2));
do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia+2), Iter2(ia+3), Iter1(ia+2));
do_search(Iter1(ia), Iter1(ia), Iter2(ia+2), Iter2(ia+3), Iter1(ia));
do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia+sa-1), Iter2(ia+sa), Iter1(ia+sa-1));
do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia+sa-3), Iter2(ia+sa), Iter1(ia+sa-3));
do_search(Iter1(ia), Iter1(ia+sa), Iter2(ia), Iter2(ia+sa), Iter1(ia));
do_search(Iter1(ia), Iter1(ia+sa-1), Iter2(ia), Iter2(ia+sa), Iter1(ia+sa-1));
do_search(Iter1(ia), Iter1(ia+1), Iter2(ia), Iter2(ia+sa), Iter1(ia+1));
char ib[] = {0, 1, 2, 0, 1, 2, 3, 0, 1, 2, 3, 4};
const unsigned sb = sizeof(ib)/sizeof(ib[0]);
char ic[] = {1};
do_search(Iter1(ib), Iter1(ib+sb), Iter2(ic), Iter2(ic+1), Iter1(ib+1));
char id[] = {1, 2};
do_search(Iter1(ib), Iter1(ib+sb), Iter2(id), Iter2(id+2), Iter1(ib+1));
char ie[] = {1, 2, 3};
do_search(Iter1(ib), Iter1(ib+sb), Iter2(ie), Iter2(ie+3), Iter1(ib+4));
char ig[] = {1, 2, 3, 4};
do_search(Iter1(ib), Iter1(ib+sb), Iter2(ig), Iter2(ig+4), Iter1(ib+8));
char ih[] = {0, 1, 1, 1, 1, 2, 3, 0, 1, 2, 3, 4};
const unsigned sh = sizeof(ih)/sizeof(ih[0]);
char ii[] = {1, 1, 2};
do_search(Iter1(ih), Iter1(ih+sh), Iter2(ii), Iter2(ii+3), Iter1(ih+3));
char ij[] = {0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0};
const unsigned sj = sizeof(ij)/sizeof(ij[0]);
char ik[] = {0, 0, 0, 0, 1, 1, 1, 1, 0, 0};
const unsigned sk = sizeof(ik)/sizeof(ik[0]);
do_search(Iter1(ij), Iter1(ij+sj), Iter2(ik), Iter2(ik+sk), Iter1(ij+6));
}
int main() {
test<random_access_iterator<const int*>, random_access_iterator<const int*> >();
test2<random_access_iterator<const char*>, random_access_iterator<const char*> >();
}
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