// (C) Copyright Gennadiy Rozental 2004-2008. | |
// 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: 49312 $ | |
// | |
// Description : generic char traits class; wraps std::char_traits | |
// *************************************************************************** | |
#ifndef BOOST_TEST_BCS_CHAR_TRAITS_HPP_071894GER | |
#define BOOST_TEST_BCS_CHAR_TRAITS_HPP_071894GER | |
// 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(__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(__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> : char_traits_with_find<char> {}; | |
template<> struct bcs_char_traits_impl<wchar_t> : char_traits_with_find<wchar_t> {}; | |
#else | |
template<> struct bcs_char_traits_impl<char> : std::char_traits<char> {}; | |
template<> struct bcs_char_traits_impl<wchar_t> : 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_BCS_CHAR_TRAITS_HPP_071894GER |