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Editing: pod_char_traits.h
// POD character, std::char_traits specialization -*- C++ -*- // Copyright (C) 2002-2018 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free // software; you can redistribute it and/or modify it under the // terms of the GNU General Public License as published by the // Free Software Foundation; either version 3, or (at your option) // any later version. // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // Under Section 7 of GPL version 3, you are granted additional // permissions described in the GCC Runtime Library Exception, version // 3.1, as published by the Free Software Foundation. // You should have received a copy of the GNU General Public License and // a copy of the GCC Runtime Library Exception along with this program; // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see // <http://www.gnu.org/licenses/>. /** @file ext/pod_char_traits.h * This file is a GNU extension to the Standard C++ Library. */ // Gabriel Dos Reis <gdr@integrable-solutions.net> // Benjamin Kosnik <bkoz@redhat.com> #ifndef _POD_CHAR_TRAITS_H #define _POD_CHAR_TRAITS_H 1 #pragma GCC system_header #include <string> namespace __gnu_cxx _GLIBCXX_VISIBILITY(default) { _GLIBCXX_BEGIN_NAMESPACE_VERSION // POD character abstraction. // NB: The char_type parameter is a subset of int_type, as to allow // int_type to properly hold the full range of char_type values as // well as EOF. /// @brief A POD class that serves as a character abstraction class. template<typename _Value, typename _Int, typename _St = std::mbstate_t> struct character { typedef _Value value_type; typedef _Int int_type; typedef _St state_type; typedef character<_Value, _Int, _St> char_type; value_type value; template<typename V2> static char_type from(const V2& v) { char_type ret = { static_cast<value_type>(v) }; return ret; } template<typename V2> static V2 to(const char_type& c) { V2 ret = { static_cast<V2>(c.value) }; return ret; } }; template<typename _Value, typename _Int, typename _St> inline bool operator==(const character<_Value, _Int, _St>& lhs, const character<_Value, _Int, _St>& rhs) { return lhs.value == rhs.value; } template<typename _Value, typename _Int, typename _St> inline bool operator<(const character<_Value, _Int, _St>& lhs, const character<_Value, _Int, _St>& rhs) { return lhs.value < rhs.value; } _GLIBCXX_END_NAMESPACE_VERSION } // namespace namespace std _GLIBCXX_VISIBILITY(default) { _GLIBCXX_BEGIN_NAMESPACE_VERSION /// char_traits<__gnu_cxx::character> specialization. template<typename _Value, typename _Int, typename _St> struct char_traits<__gnu_cxx::character<_Value, _Int, _St> > { typedef __gnu_cxx::character<_Value, _Int, _St> char_type; typedef typename char_type::int_type int_type; typedef typename char_type::state_type state_type; typedef fpos<state_type> pos_type; typedef streamoff off_type; static void assign(char_type& __c1, const char_type& __c2) { __c1 = __c2; } static bool eq(const char_type& __c1, const char_type& __c2) { return __c1 == __c2; } static bool lt(const char_type& __c1, const char_type& __c2) { return __c1 < __c2; } static int compare(const char_type* __s1, const char_type* __s2, size_t __n) { for (size_t __i = 0; __i < __n; ++__i) if (!eq(__s1[__i], __s2[__i])) return lt(__s1[__i], __s2[__i]) ? -1 : 1; return 0; } static size_t length(const char_type* __s) { const char_type* __p = __s; while (__p->value) ++__p; return (__p - __s); } static const char_type* find(const char_type* __s, size_t __n, const char_type& __a) { for (const char_type* __p = __s; size_t(__p - __s) < __n; ++__p) if (*__p == __a) return __p; return 0; } static char_type* move(char_type* __s1, const char_type* __s2, size_t __n) { if (__n == 0) return __s1; return static_cast<char_type*> (__builtin_memmove(__s1, __s2, __n * sizeof(char_type))); } static char_type* copy(char_type* __s1, const char_type* __s2, size_t __n) { if (__n == 0) return __s1; std::copy(__s2, __s2 + __n, __s1); return __s1; } static char_type* assign(char_type* __s, size_t __n, char_type __a) { std::fill_n(__s, __n, __a); return __s; } static char_type to_char_type(const int_type& __i) { return char_type::template from(__i); } static int_type to_int_type(const char_type& __c) { return char_type::template to<int_type>(__c); } static bool eq_int_type(const int_type& __c1, const int_type& __c2) { return __c1 == __c2; } static int_type eof() { int_type __r = { static_cast<typename __gnu_cxx::__conditional_type <std::__is_integer<int_type>::__value, int_type, int>::__type>(-1) }; return __r; } static int_type not_eof(const int_type& __c) { return eq_int_type(__c, eof()) ? int_type() : __c; } }; _GLIBCXX_END_NAMESPACE_VERSION } // namespace #endif
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