compare.hpp

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//  (C) Copyright Gennadiy Rozental 2004.
//  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: compare.hpp,v $
//
//  Version     : $Revision: 1.1.1.1 $
//
//  Description : class basic_cstring comparisons implementation
// ***************************************************************************

#ifndef  BASIC_CSTRING_COMPARE_HPP_071894GER
#define  BASIC_CSTRING_COMPARE_HPP_071894GER

// Boost.Test
#include <boost/test/detail/basic_cstring/basic_cstring.hpp>

// STL
#include <functional>
#include <cctype>

# if defined(BOOST_NO_STDC_NAMESPACE) && !BOOST_WORKAROUND(__BORLANDC__, <= 0x570) && !BOOST_WORKAROUND(__GNUC__, < 3)
namespace std { using ::toupper; }
# endif

namespace boost {

namespace unit_test {

// ************************************************************************** //
// **************                case_ins_compare              ************** //
// ************************************************************************** //

namespace ut_detail {

template<class CharT>
struct case_ins
{
    static bool         eq( CharT c1, CharT c2 ) { return (std::toupper)( c1 ) == (std::toupper)( c2 ); }
    static bool         lt( CharT c1, CharT c2 ) { return (std::toupper)( c1 ) <  (std::toupper)( c2 ); }

    static int          compare( CharT const* s1, CharT const* s2, std::size_t n )
    {
        for( std::size_t i = 0; i < n; ++i ) {
            if( !eq( s1[i], s2[i] ) )
                return lt( s1[i], s2[i] ) ? -1 : 1;
        }
        return 0;
    }
};

} // namespace ut_detail

// ************************************************************************** //
// **************                  case_ins_eq                 ************** //
// ************************************************************************** //

template<class CharT>
inline bool
case_ins_eq( basic_cstring<CharT> x, basic_cstring<CharT> y )
{
    return x.size() == y.size() && ut_detail::case_ins<CharT>::compare( x.begin(), y.begin(), x.size() ) == 0;
}

//____________________________________________________________________________//

// ************************************************************************** //
// **************                 case_ins_less                ************** //
// ************************************************************************** //

template<class CharT>
class case_ins_less : public std::binary_function<basic_cstring<CharT>,basic_cstring<CharT>,bool>
{
public:
    bool operator()( basic_cstring<CharT> x, basic_cstring<CharT> y ) const
    {
        return x.size() != y.size() 
                ? x.size() < y.size() 
                : ut_detail::case_ins<CharT>::compare( x.begin(), y.begin(), x.size() ) < 0;
    }
};

//____________________________________________________________________________//

// ************************************************************************** //
// **************                  operator <                  ************** //
// ************************************************************************** //

template<class CharT>
inline bool
operator <( basic_cstring<CharT> x, basic_cstring<CharT> y )
{
    typedef typename basic_cstring<CharT>::traits_type traits_type;
    return x.size() != y.size() 
            ? x.size() < y.size() 
            : traits_type::compare( x.begin(), y.begin(), x.size() ) < 0;
}

} // namespace unit_test

} // namespace boost

// ***************************************************************************
//  Revision History :
//  
//  $Log: compare.hpp,v $
//  Revision 1.1.1.1  2004/11/20 10:52:23  spion
//  Import of Boost v. 1.32.0
//
//  Revision 1.7  2004/08/11 03:18:49  rogeeff
//  second tru64cxx65 fix
//
//  Revision 1.6  2004/07/19 12:26:41  rogeeff
//  guard rename
//  portability fix
//
//  Revision 1.5  2004/06/29 04:32:25  rogeeff
//  no message
//
//  Revision 1.4  2004/06/07 07:33:19  rogeeff
//  amother borland patch
//  detail namespace renamed
//
//  Revision 1.3  2004/06/05 11:02:15  rogeeff
//  std::traits usage reworked
//
//  Revision 1.2  2004/05/21 06:19:35  rogeeff
//  licence update
//
//  Revision 1.1  2004/05/11 11:00:55  rogeeff
//  basic_cstring introduced and used everywhere
//  class properties reworked
//
// ***************************************************************************

#endif // BASIC_CSTRING_COMPARE_HPP_071894GER