// (C) Copyright Gennadiy Rozental 2001. // 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) // See http://www.boost.org/libs/test for the library home page. // // File : $RCSfile$ // // Version : $Revision$ // // Description : generic char traits class; wraps std::char_traits // *************************************************************************** #ifndef BOOST_TEST_UTILS_BCS_CHAR_TRAITS_HPP #define BOOST_TEST_UTILS_BCS_CHAR_TRAITS_HPP // Boost #include <boost/config.hpp> #include <boost/detail/workaround.hpp> #include <boost/test/detail/config.hpp> #include <boost/type_traits/add_const.hpp> // STL #include <string> // std::char_traits #include <cstddef> // std::size_t #include <boost/test/detail/suppress_warnings.hpp> //____________________________________________________________________________// namespace boost { namespace unit_test { namespace ut_detail { template<typename CharT> struct bcs_base_char { typedef CharT type; }; template<> struct bcs_base_char<char const> { typedef char type; }; template<> struct bcs_base_char<unsigned char> { typedef char type; }; #if !BOOST_WORKAROUND(BOOST_BORLANDC, BOOST_TESTED_AT(0x551)) template<> struct bcs_base_char<unsigned char const> { typedef char type; }; #endif template<> struct bcs_base_char<wchar_t const> { typedef wchar_t type; }; // ************************************************************************** // // ************** bcs_char_traits ************** // // ************************************************************************** // template<typename CharT> struct bcs_char_traits_impl { #if BOOST_WORKAROUND(BOOST_BORLANDC, BOOST_TESTED_AT(0x564)) typedef CharT const const_char; #else typedef typename boost::add_const<CharT>::type const_char; #endif static bool eq( CharT c1, CharT c2 ) { return c1 == c2; } static bool lt( CharT c1, CharT c2 ) { return c1 < c2; } static int compare( const_char* cstr1, const_char* cstr2, std::size_t n ) { while( n > 0 ) { if( !eq( *cstr1, *cstr2 ) ) return lt( *cstr1, *cstr2 ) ? -1 : 1; ++cstr1; ++cstr2; --n; } return 0; } static std::size_t length( const_char* cstr ) { const_char null_char = CharT(); const_char* ptr = cstr; while( !eq( *ptr, null_char ) ) ++ptr; return ptr - cstr; } static const_char* find( const_char* s, std::size_t n, CharT c ) { while( n > 0 ) { if( eq( *s, c ) ) return s; ++s; --n; } return 0; } }; #ifdef BOOST_CLASSIC_IOSTREAMS template<typename CharT> struct char_traits_with_find : std::string_char_traits<CharT> { static CharT const* find( CharT const* s, std::size_t n, CharT c ) { while( n > 0 ) { if( eq( *s, c ) ) return s; ++s; --n; } return 0; } }; template<> struct bcs_char_traits_impl<char> : public char_traits_with_find<char> {}; template<> struct bcs_char_traits_impl<wchar_t> : public char_traits_with_find<wchar_t> {}; #else template<> struct bcs_char_traits_impl<char> : public std::char_traits<char> {}; template<> struct bcs_char_traits_impl<wchar_t> : public std::char_traits<wchar_t> {}; #endif template<typename CharT> class bcs_char_traits : public bcs_char_traits_impl<CharT> { typedef typename ut_detail::bcs_base_char<CharT>::type the_base_char; public: #ifdef BOOST_CLASSIC_IOSTREAMS typedef std::basic_string<the_base_char, std::string_char_traits<the_base_char> > std_string; #else typedef std::basic_string<the_base_char, std::char_traits<the_base_char> > std_string; #endif }; } // namespace ut_detail } // namespace unit_test } // namespace boost //____________________________________________________________________________// #include <boost/test/detail/enable_warnings.hpp> #endif // BOOST_TEST_UTILS_BCS_CHAR_TRAITS_HPP