151 lines
4.4 KiB
Plaintext
151 lines
4.4 KiB
Plaintext
// (C) Copyright Gennadiy Rozental 2001.
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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// See http://www.boost.org/libs/test for the library home page.
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//
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// File : $RCSfile$
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//
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// Version : $Revision$
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//
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// Description : generic char traits class; wraps std::char_traits
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// ***************************************************************************
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#ifndef BOOST_TEST_UTILS_BCS_CHAR_TRAITS_HPP
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#define BOOST_TEST_UTILS_BCS_CHAR_TRAITS_HPP
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// Boost
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#include <boost/config.hpp>
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#include <boost/detail/workaround.hpp>
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#include <boost/test/detail/config.hpp>
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#include <boost/type_traits/add_const.hpp>
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// STL
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#include <string> // std::char_traits
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#include <cstddef> // std::size_t
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#include <boost/test/detail/suppress_warnings.hpp>
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//____________________________________________________________________________//
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namespace boost {
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namespace unit_test {
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namespace ut_detail {
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template<typename CharT> struct bcs_base_char { typedef CharT type; };
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template<> struct bcs_base_char<char const> { typedef char type; };
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template<> struct bcs_base_char<unsigned char> { typedef char type; };
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#if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x551))
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template<> struct bcs_base_char<unsigned char const> { typedef char type; };
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#endif
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template<> struct bcs_base_char<wchar_t const> { typedef wchar_t type; };
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// ************************************************************************** //
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// ************** bcs_char_traits ************** //
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// ************************************************************************** //
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template<typename CharT>
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struct bcs_char_traits_impl
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{
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#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
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typedef CharT const const_char;
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#else
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typedef typename boost::add_const<CharT>::type const_char;
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#endif
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static bool eq( CharT c1, CharT c2 )
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{
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return c1 == c2;
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}
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static bool lt( CharT c1, CharT c2 )
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{
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return c1 < c2;
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}
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static int compare( const_char* cstr1, const_char* cstr2, std::size_t n )
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{
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while( n > 0 ) {
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if( !eq( *cstr1, *cstr2 ) )
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return lt( *cstr1, *cstr2 ) ? -1 : 1;
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++cstr1;
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++cstr2;
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--n;
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}
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return 0;
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}
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static std::size_t length( const_char* cstr )
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{
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const_char null_char = CharT();
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const_char* ptr = cstr;
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while( !eq( *ptr, null_char ) )
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++ptr;
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return ptr - cstr;
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}
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static const_char* find( const_char* s, std::size_t n, CharT c )
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{
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while( n > 0 ) {
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if( eq( *s, c ) )
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return s;
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++s;
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--n;
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}
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return 0;
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}
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};
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#ifdef BOOST_CLASSIC_IOSTREAMS
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template<typename CharT>
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struct char_traits_with_find : std::string_char_traits<CharT> {
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static CharT const* find( CharT const* s, std::size_t n, CharT c )
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{
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while( n > 0 ) {
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if( eq( *s, c ) )
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return s;
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++s;
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--n;
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}
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return 0;
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}
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};
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template<> struct bcs_char_traits_impl<char> : public char_traits_with_find<char> {};
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template<> struct bcs_char_traits_impl<wchar_t> : public char_traits_with_find<wchar_t> {};
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#else
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template<> struct bcs_char_traits_impl<char> : public std::char_traits<char> {};
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template<> struct bcs_char_traits_impl<wchar_t> : public std::char_traits<wchar_t> {};
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#endif
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template<typename CharT>
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class bcs_char_traits : public bcs_char_traits_impl<CharT> {
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typedef typename ut_detail::bcs_base_char<CharT>::type the_base_char;
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public:
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#ifdef BOOST_CLASSIC_IOSTREAMS
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typedef std::basic_string<the_base_char, std::string_char_traits<the_base_char> > std_string;
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#else
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typedef std::basic_string<the_base_char, std::char_traits<the_base_char> > std_string;
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#endif
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};
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} // namespace ut_detail
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} // namespace unit_test
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} // namespace boost
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//____________________________________________________________________________//
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#include <boost/test/detail/enable_warnings.hpp>
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#endif // BOOST_TEST_UTILS_BCS_CHAR_TRAITS_HPP
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