williamr@2: // Boost.Range library
williamr@2: //
williamr@2: //  Copyright Thorsten Ottosen 2003-2004. Use, modification and
williamr@2: //  distribution is subject to the Boost Software License, Version
williamr@2: //  1.0. (See accompanying file LICENSE_1_0.txt or copy at
williamr@2: //  http://www.boost.org/LICENSE_1_0.txt)
williamr@2: //
williamr@2: // For more information, see http://www.boost.org/libs/range/
williamr@2: //
williamr@2: 
williamr@2: #ifndef BOOST_RANGE_DETAIL_IMPLEMENTATION_HELP_HPP
williamr@2: #define BOOST_RANGE_DETAIL_IMPLEMENTATION_HELP_HPP
williamr@2: 
williamr@2: #include <boost/range/config.hpp>
williamr@2: #include <boost/range/detail/common.hpp>
williamr@2: #include <boost/type_traits/is_same.hpp>
williamr@2: #include <cstddef>
williamr@2: #include <string.h>
williamr@2: 
williamr@2: #ifndef BOOST_NO_CWCHAR
williamr@2: #include <wchar.h>
williamr@2: #endif
williamr@2: 
williamr@2: namespace boost 
williamr@2: {
williamr@2:     namespace range_detail
williamr@2:     {
williamr@2:         
williamr@2:         /////////////////////////////////////////////////////////////////////
williamr@2:         // end() help
williamr@2:         /////////////////////////////////////////////////////////////////////
williamr@2: 
williamr@2:         inline const char* str_end( const char* s, const char* )
williamr@2:         {
williamr@2:             return s + strlen( s );
williamr@2:         }
williamr@2:         
williamr@2: #ifndef BOOST_NO_CWCHAR
williamr@2:         inline const wchar_t* str_end( const wchar_t* s, const wchar_t* )
williamr@2:         {
williamr@2:             return s + wcslen( s );
williamr@2:         }
williamr@2: #else
williamr@2:         inline const wchar_t* str_end( const wchar_t* s, const wchar_t* )
williamr@2:         {
williamr@2:             if( s == 0 || s[0] == 0 )
williamr@2:                 return s;
williamr@2:             while( *++s != 0 )
williamr@2:                 ;
williamr@2:             return s;
williamr@2:         }
williamr@2: #endif         
williamr@2: 
williamr@2:         template< class Char >
williamr@2:         inline Char* str_end( Char* s )
williamr@2:         {
williamr@2:             return const_cast<Char*>( str_end( s, s ) );
williamr@2:         }
williamr@2: 
williamr@2:         template< class T, std::size_t sz >
williamr@2:         inline T* array_end( T BOOST_RANGE_ARRAY_REF()[sz], int )
williamr@2:         {
williamr@2:             return boost_range_array + sz;
williamr@2:         }
williamr@2:         
williamr@2:         template< class T, std::size_t sz >
williamr@2:         inline const T* array_end( const T BOOST_RANGE_ARRAY_REF()[sz], int )
williamr@2:         {
williamr@2:             return boost_range_array + sz;
williamr@2:         }
williamr@2: 
williamr@2:         template< class T, std::size_t sz >
williamr@2:         inline T* array_end( T BOOST_RANGE_ARRAY_REF()[sz], char_or_wchar_t_array_tag )
williamr@2:         {
williamr@2:             return boost_range_array + sz - 1;
williamr@2:         }
williamr@2:         
williamr@2:         template< class T, std::size_t sz >
williamr@2:         inline const T* array_end( const T BOOST_RANGE_ARRAY_REF()[sz], char_or_wchar_t_array_tag )
williamr@2:         {
williamr@2:             return boost_range_array + sz - 1;
williamr@2:         }
williamr@2: 
williamr@2:         template< class T, std::size_t sz >
williamr@2:         inline T* array_end( T BOOST_RANGE_ARRAY_REF()[sz] )
williamr@2:         {
williamr@2:             typedef BOOST_RANGE_DEDUCED_TYPENAME boost::mpl::if_c< is_same<char,T>::value || is_same<wchar_t,T>::value,
williamr@2:                                                                 char_or_wchar_t_array_tag,
williamr@2:                                                                 int >::type tag;
williamr@2: 
williamr@2:             return array_end<T,sz>( boost_range_array, tag() );
williamr@2:         }
williamr@2:         
williamr@2:         template< class T, std::size_t sz >
williamr@2:         inline const T* array_end( const T BOOST_RANGE_ARRAY_REF()[sz] )
williamr@2:         {
williamr@2:             typedef BOOST_RANGE_DEDUCED_TYPENAME boost::mpl::if_c< is_same<char,T>::value || is_same<wchar_t,T>::value,
williamr@2:                                                                 char_or_wchar_t_array_tag,
williamr@2:                                                                 int >::type tag;
williamr@2:         
williamr@2:             return array_end<T,sz>( boost_range_array, tag() );
williamr@2:         }
williamr@2: 
williamr@2:         /////////////////////////////////////////////////////////////////////
williamr@2:         // size() help
williamr@2:         /////////////////////////////////////////////////////////////////////
williamr@2:         
williamr@2:         template< class Char >
williamr@2:         inline std::size_t str_size( const Char* const& s )
williamr@2:         {
williamr@2:             return str_end( s ) - s;
williamr@2:         }
williamr@2:          
williamr@2:         template< class T, std::size_t sz >
williamr@2:         inline std::size_t array_size( T BOOST_RANGE_ARRAY_REF()[sz], int )
williamr@2:         {
williamr@2:             return sz;
williamr@2:         }
williamr@2:        
williamr@2:         template< class T, std::size_t sz >
williamr@2:         inline std::size_t array_size( const T BOOST_RANGE_ARRAY_REF()[sz], int )
williamr@2:         {
williamr@2:             return sz;
williamr@2:         }
williamr@2: 
williamr@2:         template< class T, std::size_t sz >
williamr@2:         inline std::size_t array_size( T BOOST_RANGE_ARRAY_REF()[sz], char_or_wchar_t_array_tag )
williamr@2:         {
williamr@2:             return sz - 1;
williamr@2:         }
williamr@2:                  
williamr@2:         template< class T, std::size_t sz >
williamr@2:         inline std::size_t array_size( const T BOOST_RANGE_ARRAY_REF()[sz], char_or_wchar_t_array_tag )
williamr@2:         {
williamr@2:             return sz - 1;
williamr@2:         }
williamr@2: 
williamr@2:         template< class T, std::size_t sz >
williamr@2:         inline std::size_t array_size( T BOOST_RANGE_ARRAY_REF()[sz] )
williamr@2:         {
williamr@2:             typedef BOOST_RANGE_DEDUCED_TYPENAME boost::mpl::if_c< is_same<const char,T>::value || is_same<const wchar_t,T>::value ||
williamr@2:                                                                    is_same<char,T>::value       || is_same<wchar_t,T>::value,
williamr@2:                                                                 char_or_wchar_t_array_tag,
williamr@2:                                                                 int >::type tag;
williamr@2:             return array_size<T,sz>( boost_range_array, tag() );
williamr@2:         }
williamr@2: 
williamr@2:         template< class T, std::size_t sz >
williamr@2:         inline std::size_t array_size( const T BOOST_RANGE_ARRAY_REF()[sz] )
williamr@2:         {
williamr@2:             typedef BOOST_RANGE_DEDUCED_TYPENAME boost::mpl::if_c< is_same<char,T>::value || is_same<wchar_t,T>::value,
williamr@2:                                                                 char_or_wchar_t_array_tag,
williamr@2:                                                                 int >::type tag;
williamr@2:             return array_size<T,sz>( boost_range_array, tag() );
williamr@2:         }
williamr@2: 
williamr@2:     } // namespace 'range_detail'
williamr@2:     
williamr@2: } // namespace 'boost'
williamr@2: 
williamr@2: 
williamr@2: #endif