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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