1 // POD character, std::char_traits specialization -*- C++ -*-
3 // Copyright (C) 2002, 2003 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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 // Gabriel Dos Reis <gdr@integrable-solutions.net>
31 // Benjamin Kosnik <bkoz@redhat.com>
33 #ifndef _POD_CHAR_TRAITS_H
34 #define _POD_CHAR_TRAITS_H 1
40 template<typename V, typename I, typename S = mbstate_t>
49 template<typename V, typename I>
51 operator==(const character<V, I>& lhs, const character<V, I>& rhs)
52 { return lhs.value == rhs.value; }
54 template<typename V, typename I>
56 operator<(const character<V, I>& lhs, const character<V, I>& rhs)
57 { return lhs.value < rhs.value; }
58 } // namespace __gnu_cxx
62 // Provide std::char_traits specialization.
63 template<typename V, typename I, typename S>
64 struct char_traits<__gnu_cxx::character<V, I, S> >
66 typedef __gnu_cxx::character<V, I, S> char_type;
68 // NB: This type should be bigger than char_type, so as to
69 // properly hold EOF values in addition to the full range of
72 // int_type(value_type) is valid.
73 // int_type(-1) is possible.
74 typedef typename char_type::int_type int_type;
75 typedef typename char_type::state_type state_type;
76 typedef fpos<state_type> pos_type;
77 typedef streamoff off_type;
80 assign(char_type& __c1, const char_type& __c2)
84 eq(const char_type& __c1, const char_type& __c2)
85 { return __c1 == __c2; }
88 lt(const char_type& __c1, const char_type& __c2)
89 { return __c1 < __c2; }
92 compare(const char_type* __s1, const char_type* __s2, size_t __n)
94 for (size_t __i = 0; __i < __n; ++__i)
95 if (!eq(__s1[__i], __s2[__i]))
96 return lt(__s1[__i], __s2[__i]) ? -1 : 1;
101 length(const char_type* __s)
103 const char_type* __p = __s;
109 static const char_type*
110 find(const char_type* __s, size_t __n, const char_type& __a)
112 for (const char_type* __p = __s; size_t(__p - __s) < __n; ++__p)
119 move(char_type* __s1, const char_type* __s2, size_t __n)
120 { return (char_type*) memmove(__s1, __s2, __n * sizeof(char_type)); }
123 copy(char_type* __s1, const char_type* __s2, size_t __n)
124 { return (char_type*) memcpy(__s1, __s2, __n * sizeof(char_type)); }
127 assign(char_type* __s, size_t __n, char_type __a)
129 for (char_type* __p = __s; __p < __s + __n; ++__p)
135 to_char_type(const int_type& __c)
137 char_type __r = { __c };
142 to_int_type(const char_type& __c)
143 { return int_type(__c.value); }
146 eq_int_type(const int_type& __c1, const int_type& __c2)
147 { return __c1 == __c2; }
150 eof() { return static_cast<int_type>(-1); }
153 not_eof(const int_type& __c)
154 { return eq_int_type(__c, eof()) ? int_type(0) : __c; }