| /* |
| * Copyright Andrey Semashev 2007 - 2015. |
| * Distributed under the Boost Software License, Version 1.0. |
| * (See accompanying file LICENSE_1_0.txt or copy at |
| * http://www.boost.org/LICENSE_1_0.txt) |
| */ |
| /*! |
| * \file contains.hpp |
| * \author Andrey Semashev |
| * \date 30.03.2008 |
| * |
| * This header contains a predicate for checking if the provided string contains a substring. |
| */ |
| |
| #ifndef BOOST_LOG_UTILITY_FUNCTIONAL_CONTAINS_HPP_INCLUDED_ |
| #define BOOST_LOG_UTILITY_FUNCTIONAL_CONTAINS_HPP_INCLUDED_ |
| |
| #include <boost/log/detail/config.hpp> |
| #include <boost/log/detail/header.hpp> |
| |
| #ifdef BOOST_HAS_PRAGMA_ONCE |
| #pragma once |
| #endif |
| |
| namespace boost { |
| |
| BOOST_LOG_OPEN_NAMESPACE |
| |
| //! The \c contains functor |
| struct contains_fun |
| { |
| typedef bool result_type; |
| |
| template< typename T, typename U > |
| bool operator() (T const& left, U const& right) const |
| { |
| typedef typename T::const_iterator left_iterator; |
| typedef typename U::const_iterator right_iterator; |
| |
| typename U::size_type const right_size = right.size(); |
| if (left.size() >= right_size) |
| { |
| const left_iterator search_end = left.end() - right_size + 1; |
| const right_iterator right_end = right.end(); |
| for (left_iterator it = left.begin(); it != search_end; ++it) |
| { |
| left_iterator left_it = it; |
| right_iterator right_it = right.begin(); |
| for (; right_it != right_end; ++left_it, ++right_it) |
| { |
| if (*left_it != *right_it) |
| break; |
| } |
| if (right_it == right_end) |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| }; |
| |
| BOOST_LOG_CLOSE_NAMESPACE // namespace log |
| |
| } // namespace boost |
| |
| #include <boost/log/detail/footer.hpp> |
| |
| #endif // BOOST_LOG_UTILITY_FUNCTIONAL_CONTAINS_HPP_INCLUDED_ |