string_traits.hpp

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#endif /* 0 */


/* C-style Unicode string */
STLSOFT_TEMPLATE_SPECIALISATION
struct string_traits<ss_char_w_t *>
{
    typedef ss_char_w_t             value_type;
    typedef ss_char_w_t             char_type;
    typedef ss_size_t               size_type;
    typedef char_type const         const_char_type;
    typedef value_type const        *string_type;
    typedef value_type              *pointer;
    typedef value_type const        *const_pointer;
    enum {  is_pointer          =   true                };
    enum {  is_pointer_to_const =   false               };
    enum {  char_type_size      =   sizeof(char_type)   };

    static string_type empty_string()
    {
        // This character array is initialised to 0, which conveniently happens to
        // be the empty string, by the module/application load, so it is
        // guaranteed to be valid, and there are no threading/race conditions
        static char_type    s_empty[1];

        STLSOFT_ASSERT(s_empty[0] == '\0'); // Paranoid check

        return s_empty;
    }
};

STLSOFT_TEMPLATE_SPECIALISATION
struct string_traits<ss_char_w_t const *>
{
    typedef ss_char_w_t             value_type;
    typedef ss_char_w_t             char_type;
    typedef ss_size_t               size_type;
    typedef char_type const         const_char_type;
    typedef value_type const        *string_type;
    typedef value_type              *pointer;
    typedef value_type const        *const_pointer;
    enum {  is_pointer          =   true                };
    enum {  is_pointer_to_const =   false               };
    enum {  char_type_size      =   sizeof(char_type)   };

    static string_type empty_string()
    {
        // This character array is initialised to 0, which conveniently happens to
        // be the empty string, by the module/application load, so it is
        // guaranteed to be valid, and there are no threading/race conditions
        static char_type    s_empty[1];

        STLSOFT_ASSERT(s_empty[0] == '\0'); // Paranoid check

        return s_empty;
    }
};

/* std::basic_string */
# ifndef _STLSOFT_STRING_TRAITS_NO_STD_STRING
#  ifdef STLSOFT_CF_TEMPLATE_PARTIAL_SPECIALISATION_SUPPORT
template <ss_typename_param_k C>
struct string_traits<stlsoft_ns_qual_std(basic_string)<C> >
{
    // NOTE: Originally, what is string_type_ was defined as value_type, but
    // Borland objects to value_type::value_type.
    typedef stlsoft_ns_qual_std(basic_string)<C>                    string_type_;
    typedef ss_typename_type_k string_type_::value_type             char_type;
    typedef ss_typename_type_k string_type_::size_type              size_type;
    typedef char_type const                                         const_char_type;
    typedef string_type_                                            string_type;
    typedef string_type_                                            value_type;
    typedef ss_typename_type_k string_type::pointer                 pointer;
    typedef ss_typename_type_k string_type::const_pointer           const_pointer;
    typedef ss_typename_type_k string_type::iterator                iterator;
    typedef ss_typename_type_k string_type::const_iterator          const_iterator;
    typedef ss_typename_type_k string_type::reverse_iterator        reverse_iterator;
    typedef ss_typename_type_k string_type::const_reverse_iterator  const_reverse_iterator;
    enum {  is_pointer          =   false               };
    enum {  is_pointer_to_const =   false               };
    enum {  char_type_size      =   sizeof(char_type)   };

    static string_type empty_string()
    {
        return string_type();
    }
    static string_type construct(string_type const &src, size_type pos, size_type len)
    {
        return string_type(src, pos, len);
    }
#  ifdef STLSOFT_CF_MEMBER_TEMPLATE_FUNCTION_SUPPORT
    template <ss_typename_param_k I>
    static string_type &assign_inplace(string_type &str, I first, I last)
#  else /* ? STLSOFT_CF_MEMBER_TEMPLATE_FUNCTION_SUPPORT */
    static string_type &assign_inplace(string_type &str, const_iterator first, const_iterator last)
#  endif /* STLSOFT_CF_MEMBER_TEMPLATE_FUNCTION_SUPPORT */
    {
        // std::basic_string cannot assign in-place (or rather not all implementations do so)
        str.erase(last, str.end());
        str.erase(str.begin(), first);

        return str;
    }
};
#  else /* ? STLSOFT_CF_TEMPLATE_PARTIAL_SPECIALISATION_SUPPORT */
#   if defined(STLSOFT_CF_std_NAMESPACE)
STLSOFT_TEMPLATE_SPECIALISATION
struct string_traits<stlsoft_ns_qual_std(basic_string)<ss_char_a_t> >
{
    typedef stlsoft_ns_qual_std(basic_string)<ss_char_a_t>  value_type;
    typedef value_type::value_type                          char_type;
    typedef value_type::size_type                           size_type;
    typedef char_type const                                 const_char_type;
    typedef value_type                                      string_type;
    typedef string_type::pointer                            pointer;
    typedef string_type::const_pointer                      const_pointer;
    typedef string_type::iterator                           iterator;
    typedef string_type::const_iterator                     const_iterator;
    typedef string_type::reverse_iterator                   reverse_iterator;
    typedef string_type::const_reverse_iterator             const_reverse_iterator;
    enum {  is_pointer          =   false               };
    enum {  is_pointer_to_const =   false               };
    enum {  char_type_size      =   sizeof(char_type)   };

    static string_type empty_string()
    {
        return string_type();
    }
    static string_type construct(string_type const &src, size_type pos, size_type len)
    {
        return string_type(src, pos, len);
    }
#  ifdef STLSOFT_CF_MEMBER_TEMPLATE_FUNCTION_SUPPORT
    template <ss_typename_param_k I>
    static string_type &assign_inplace(string_type &str, I first, I last)
#  else /* ? STLSOFT_CF_MEMBER_TEMPLATE_FUNCTION_SUPPORT */
    static string_type &assign_inplace(string_type &str, const_iterator first, const_iterator last)
#  endif /* STLSOFT_CF_MEMBER_TEMPLATE_FUNCTION_SUPPORT */
    {
        // std::basic_string cannot assign in-place (or rather not all implementations do so)
        str.erase(last, str.end());
        str.erase(str.begin(), first);

        return str;
    }
};

STLSOFT_TEMPLATE_SPECIALISATION
struct string_traits<stlsoft_ns_qual_std(basic_string)<ss_char_w_t> >
{
    typedef stlsoft_ns_qual_std(basic_string)<ss_char_w_t>  value_type;
    typedef value_type::value_type                          char_type;
    typedef value_type::size_type                           size_type;
    typedef char_type const                                 const_char_type;
    typedef value_type                                      string_type;
    typedef string_type::pointer                            pointer;
    typedef string_type::const_pointer                      const_pointer;
    typedef string_type::iterator                           iterator;
    typedef string_type::const_iterator                     const_iterator;
    typedef string_type::reverse_iterator                   reverse_iterator;
    typedef string_type::const_reverse_iterator             const_reverse_iterator;
    enum {  is_pointer          =   false               };
    enum {  is_pointer_to_const =   false               };
    enum {  char_type_size      =   sizeof(char_type)   };

    static string_type empty_string()
    {
        return string_type();
    }
    static string_type construct(string_type const &src, size_type pos, size_type len)
    {
        return string_type(src, pos, len);
    }
#  ifdef STLSOFT_CF_MEMBER_TEMPLATE_FUNCTION_SUPPORT
    template <ss_typename_param_k I>
    static string_type &assign_inplace(string_type &str, I first, I last)
#  else /* ? STLSOFT_CF_MEMBER_TEMPLATE_FUNCTION_SUPPORT */
    static string_type &assign_inplace(string_type &str, const_iterator first, const_iterator last)
#  endif /* STLSOFT_CF_MEMBER_TEMPLATE_FUNCTION_SUPPORT */
    {
        // std::basic_string cannot assign in-place (or rather not all implementations do so)
        str.erase(last, str.end());
        str.erase(str.begin(), first);

        return str;
    }
};
#   endif /* STLSOFT_CF_std_NAMESPACE */
#  endif /* STLSOFT_CF_TEMPLATE_PARTIAL_SPECIALISATION_SUPPORT */
# endif /* _STLSOFT_STRING_TRAITS_NO_STD_STRING */

#endif /* !STLSOFT_DOCUMENTATION_SKIP_SECTION */

////////////////////////////////////////////////////////////////////////////
// Unit-testing

#ifdef STLSOFT_UNITTEST
# include "./unittest/string_traits_unittest_.h"
#endif /* STLSOFT_UNITTEST */

/* ////////////////////////////////////////////////////////////////////// */

#ifndef _STLSOFT_NO_NAMESPACE
} // namespace stlsoft
#endif /* _STLSOFT_NO_NAMESPACE */

/* ////////////////////////////////////////////////////////////////////// */

#endif /* !STLSOFT_INCL_STLSOFT_STRING_HPP_STRING_TRAITS */

/* ////////////////////////////////////////////////////////////////////// */