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// (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(__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> : 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
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