1 // POD character, std::char_traits specialization -*- C++ -*-
3 // Copyright (C) 2002, 2003, 2004 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 /** @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
44 /// @brief A POD class that serves as a character abstraction class.
45 template<typename V
, typename I
, typename S
= mbstate_t>
54 template<typename V
, typename I
>
56 operator==(const character
<V
, I
>& lhs
, const character
<V
, I
>& rhs
)
57 { return lhs
.value
== rhs
.value
; }
59 template<typename V
, typename I
>
61 operator<(const character
<V
, I
>& lhs
, const character
<V
, I
>& rhs
)
62 { return lhs
.value
< rhs
.value
; }
63 } // namespace __gnu_cxx
67 /// char_traits<__gnu_cxx::character> specialization.
68 template<typename V
, typename I
, typename S
>
69 struct char_traits
<__gnu_cxx::character
<V
, I
, S
> >
71 typedef __gnu_cxx::character
<V
, I
, S
> char_type
;
73 // NB: This type should be bigger than char_type, so as to
74 // properly hold EOF values in addition to the full range of
77 // int_type(value_type) is valid.
78 // int_type(-1) is possible.
79 typedef typename
char_type::int_type int_type
;
80 typedef typename
char_type::state_type state_type
;
81 typedef fpos
<state_type
> pos_type
;
82 typedef streamoff off_type
;
85 assign(char_type
& __c1
, const char_type
& __c2
)
89 eq(const char_type
& __c1
, const char_type
& __c2
)
90 { return __c1
== __c2
; }
93 lt(const char_type
& __c1
, const char_type
& __c2
)
94 { return __c1
< __c2
; }
97 compare(const char_type
* __s1
, const char_type
* __s2
, size_t __n
)
99 for (size_t __i
= 0; __i
< __n
; ++__i
)
100 if (!eq(__s1
[__i
], __s2
[__i
]))
101 return lt(__s1
[__i
], __s2
[__i
]) ? -1 : 1;
106 length(const char_type
* __s
)
108 const char_type
* __p
= __s
;
114 static const char_type
*
115 find(const char_type
* __s
, size_t __n
, const char_type
& __a
)
117 for (const char_type
* __p
= __s
; size_t(__p
- __s
) < __n
; ++__p
)
124 move(char_type
* __s1
, const char_type
* __s2
, size_t __n
)
125 { return (char_type
*) memmove(__s1
, __s2
, __n
* sizeof(char_type
)); }
128 copy(char_type
* __s1
, const char_type
* __s2
, size_t __n
)
129 { return (char_type
*) memcpy(__s1
, __s2
, __n
* sizeof(char_type
)); }
132 assign(char_type
* __s
, size_t __n
, char_type __a
)
134 for (char_type
* __p
= __s
; __p
< __s
+ __n
; ++__p
)
140 to_char_type(const int_type
& __c
)
142 char_type __r
= { __c
};
147 to_int_type(const char_type
& __c
)
148 { return int_type(__c
.value
); }
151 eq_int_type(const int_type
& __c1
, const int_type
& __c2
)
152 { return __c1
== __c2
; }
155 eof() { return static_cast<int_type
>(-1); }
158 not_eof(const int_type
& __c
)
159 { return eq_int_type(__c
, eof()) ? int_type(0) : __c
; }