1 // POD character, std::char_traits specialization -*- C++ -*-
3 // Copyright (C) 2002, 2003, 2004, 2005, 2007, 2009 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 3, 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 // Under Section 7 of GPL version 3, you are granted additional
17 // permissions described in the GCC Runtime Library Exception, version
18 // 3.1, as published by the Free Software Foundation.
20 // You should have received a copy of the GNU General Public License and
21 // a copy of the GCC Runtime Library Exception along with this program;
22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 // <http://www.gnu.org/licenses/>.
25 /** @file ext/pod_char_traits.h
26 * This file is a GNU extension to the Standard C++ Library.
29 // Gabriel Dos Reis <gdr@integrable-solutions.net>
30 // Benjamin Kosnik <bkoz@redhat.com>
32 #ifndef _POD_CHAR_TRAITS_H
33 #define _POD_CHAR_TRAITS_H 1
37 _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
39 // POD character abstraction.
40 // NB: The char_type parameter is a subset of int_type, as to allow
41 // int_type to properly hold the full range of char_type values as
43 /// @brief A POD class that serves as a character abstraction class.
44 template<typename V, typename I, typename S = std::mbstate_t>
50 typedef character<V, I, S> char_type;
58 char_type ret = { static_cast<value_type>(v) };
64 to(const char_type& c)
66 V2 ret = { static_cast<V2>(c.value) };
72 template<typename V, typename I, typename S>
74 operator==(const character<V, I, S>& lhs, const character<V, I, S>& rhs)
75 { return lhs.value == rhs.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 _GLIBCXX_END_NAMESPACE
84 _GLIBCXX_BEGIN_NAMESPACE(std)
86 /// char_traits<__gnu_cxx::character> specialization.
87 template<typename V, typename I, typename S>
88 struct char_traits<__gnu_cxx::character<V, I, S> >
90 typedef __gnu_cxx::character<V, I, S> char_type;
91 typedef typename char_type::int_type int_type;
92 typedef typename char_type::state_type state_type;
93 typedef fpos<state_type> pos_type;
94 typedef streamoff off_type;
97 assign(char_type& __c1, const char_type& __c2)
101 eq(const char_type& __c1, const char_type& __c2)
102 { return __c1 == __c2; }
105 lt(const char_type& __c1, const char_type& __c2)
106 { return __c1 < __c2; }
109 compare(const char_type* __s1, const char_type* __s2, size_t __n)
111 for (size_t __i = 0; __i < __n; ++__i)
112 if (!eq(__s1[__i], __s2[__i]))
113 return lt(__s1[__i], __s2[__i]) ? -1 : 1;
118 length(const char_type* __s)
120 const char_type* __p = __s;
126 static const char_type*
127 find(const char_type* __s, size_t __n, const char_type& __a)
129 for (const char_type* __p = __s; size_t(__p - __s) < __n; ++__p)
136 move(char_type* __s1, const char_type* __s2, size_t __n)
138 return static_cast<char_type*>
139 (__builtin_memmove(__s1, __s2, __n * sizeof(char_type)));
143 copy(char_type* __s1, const char_type* __s2, size_t __n)
145 std::copy(__s2, __s2 + __n, __s1);
150 assign(char_type* __s, size_t __n, char_type __a)
152 std::fill_n(__s, __n, __a);
157 to_char_type(const int_type& __i)
158 { return char_type::template from(__i); }
161 to_int_type(const char_type& __c)
162 { return char_type::template to<int_type>(__c); }
165 eq_int_type(const int_type& __c1, const int_type& __c2)
166 { return __c1 == __c2; }
171 int_type __r = { -1 };
176 not_eof(const int_type& __c)
177 { return eq_int_type(__c, eof()) ? int_type() : __c; }
180 _GLIBCXX_END_NAMESPACE