1 // POD character, std::char_traits specialization -*- C++ -*-
3 // Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 2, or (at your option)
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
16 // You should have received a copy of the GNU General Public License along
17 // with this library; see the file COPYING. If not, write to the Free
18 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
21 // As a special exception, you may use this file as part of a free software
22 // library without restriction. Specifically, if other files instantiate
23 // templates or use macros or inline functions from this file, or you compile
24 // this file and link it with other files to produce an executable, this
25 // file does not by itself cause the resulting executable to be covered by
26 // the GNU General Public License. This exception does not however
27 // invalidate any other reasons why the executable file might be covered by
28 // the GNU General Public License.
30 /** @file ext/pod_char_traits.h
31 * This file is a GNU extension to the Standard C++ Library.
34 // Gabriel Dos Reis <gdr@integrable-solutions.net>
35 // Benjamin Kosnik <bkoz@redhat.com>
37 #ifndef _POD_CHAR_TRAITS_H
38 #define _POD_CHAR_TRAITS_H 1
42 _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
44 // POD character abstraction.
45 // NB: The char_type parameter is a subset of int_type, as to allow
46 // int_type to properly hold the full range of char_type values as
48 /// @brief A POD class that serves as a character abstraction class.
49 template<typename V, typename I, typename S = mbstate_t>
55 typedef character<V, I, S> char_type;
63 char_type ret = { static_cast<value_type>(v) };
69 to(const char_type& c)
71 V2 ret = { static_cast<V2>(c.value) };
77 template<typename V, typename I, typename S>
79 operator==(const character<V, I, S>& lhs, const character<V, I, S>& rhs)
80 { return lhs.value == rhs.value; }
82 template<typename V, typename I, typename S>
84 operator<(const character<V, I, S>& lhs, const character<V, I, S>& rhs)
85 { return lhs.value < rhs.value; }
87 _GLIBCXX_END_NAMESPACE
89 _GLIBCXX_BEGIN_NAMESPACE(std)
91 /// char_traits<__gnu_cxx::character> specialization.
92 template<typename V, typename I, typename S>
93 struct char_traits<__gnu_cxx::character<V, I, S> >
95 typedef __gnu_cxx::character<V, I, S> char_type;
96 typedef typename char_type::int_type int_type;
97 typedef typename char_type::state_type state_type;
98 typedef fpos<state_type> pos_type;
99 typedef streamoff off_type;
102 assign(char_type& __c1, const char_type& __c2)
106 eq(const char_type& __c1, const char_type& __c2)
107 { return __c1 == __c2; }
110 lt(const char_type& __c1, const char_type& __c2)
111 { return __c1 < __c2; }
114 compare(const char_type* __s1, const char_type* __s2, size_t __n)
116 for (size_t __i = 0; __i < __n; ++__i)
117 if (!eq(__s1[__i], __s2[__i]))
118 return lt(__s1[__i], __s2[__i]) ? -1 : 1;
123 length(const char_type* __s)
125 const char_type* __p = __s;
131 static const char_type*
132 find(const char_type* __s, size_t __n, const char_type& __a)
134 for (const char_type* __p = __s; size_t(__p - __s) < __n; ++__p)
141 move(char_type* __s1, const char_type* __s2, size_t __n)
143 return static_cast<char_type*>(std::memmove(__s1, __s2,
144 __n * sizeof(char_type)));
148 copy(char_type* __s1, const char_type* __s2, size_t __n)
150 std::copy(__s2, __s2 + __n, __s1);
155 assign(char_type* __s, size_t __n, char_type __a)
157 std::fill_n(__s, __n, __a);
162 to_char_type(const int_type& __i)
163 { return char_type::template from(__i); }
166 to_int_type(const char_type& __c)
167 { return char_type::template to<int_type>(__c); }
170 eq_int_type(const int_type& __c1, const int_type& __c2)
171 { return __c1 == __c2; }
176 int_type __r = { -1 };
181 not_eof(const int_type& __c)
182 { return eq_int_type(__c, eof()) ? int_type() : __c; }
185 _GLIBCXX_END_NAMESPACE