| // POD character, std::char_traits specialization -*- C++ -*- |
| |
| // Copyright (C) 2002, 2003, 2004, 2005 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 2, 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. |
| |
| // You should have received a copy of the GNU General Public License along |
| // with this library; see the file COPYING. If not, write to the Free |
| // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, |
| // USA. |
| |
| // As a special exception, you may use this file as part of a free software |
| // library without restriction. Specifically, if other files instantiate |
| // templates or use macros or inline functions from this file, or you compile |
| // this file and link it with other files to produce an executable, this |
| // file does not by itself cause the resulting executable to be covered by |
| // the GNU General Public License. This exception does not however |
| // invalidate any other reasons why the executable file might be covered by |
| // the GNU General Public License. |
| |
| /** @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 |
| |
| #include <string> |
| |
| _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx) |
| |
| // 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 V, typename I, typename S = mbstate_t> |
| struct character |
| { |
| typedef V value_type; |
| typedef I int_type; |
| typedef S state_type; |
| typedef character<V, I, S> 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 V, typename I, typename S> |
| inline bool |
| operator==(const character<V, I, S>& lhs, const character<V, I, S>& rhs) |
| { return lhs.value == rhs.value; } |
| |
| template<typename V, typename I, typename S> |
| inline bool |
| operator<(const character<V, I, S>& lhs, const character<V, I, S>& rhs) |
| { return lhs.value < rhs.value; } |
| |
| _GLIBCXX_END_NAMESPACE |
| |
| _GLIBCXX_BEGIN_NAMESPACE(std) |
| |
| /// char_traits<__gnu_cxx::character> specialization. |
| template<typename V, typename I, typename S> |
| struct char_traits<__gnu_cxx::character<V, I, S> > |
| { |
| typedef __gnu_cxx::character<V, I, S> 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) |
| { |
| return static_cast<char_type*>(std::memmove(__s1, __s2, |
| __n * sizeof(char_type))); |
| } |
| |
| static char_type* |
| copy(char_type* __s1, const char_type* __s2, size_t __n) |
| { |
| 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 = { -1 }; |
| return __r; |
| } |
| |
| static int_type |
| not_eof(const int_type& __c) |
| { return eq_int_type(__c, eof()) ? int_type() : __c; } |
| }; |
| |
| _GLIBCXX_END_NAMESPACE |
| |
| #endif |