1 // Copyright (C) 2003, 2004 Free Software Foundation, Inc.
3 // This file is part of the GNU ISO C++ Library. This library is free
4 // software; you can redistribute it and/or modify it under the
5 // terms of the GNU General Public License as published by the
6 // Free Software Foundation; either version 2, or (at your option)
9 // This library is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
14 // You should have received a copy of the GNU General Public License along
15 // with this library; see the file COPYING. If not, write to the Free
16 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
19 // 27.8.1.4 Overridden virtual functions
23 #include <testsuite_hooks.h>
25 template <typename InternT
, typename StateT
= std::mbstate_t>
26 class checksumcvt
: public std::codecvt
<InternT
, char, StateT
>
28 typedef std::codecvt
<InternT
, char, StateT
> Base
;
29 static const std::size_t width
= sizeof(InternT
) + 1;
32 typedef InternT intern_type
;
33 typedef char extern_type
;
35 explicit checksumcvt(std::size_t refs
= 0)
40 virtual std::codecvt_base::result
41 do_out(StateT
&, const intern_type
* from
,
42 const intern_type
* from_end
, const intern_type
*& from_next
,
43 extern_type
* to
, extern_type
* to_end
,
44 extern_type
*& to_next
) const
46 size_t len
= std::min(static_cast<size_t>(from_end
- from
),
47 static_cast<size_t>(to_end
- to
) / width
);
52 reinterpret_cast<const char*>(from
);
53 unsigned char checksum
= 0;
55 for (std::size_t i
= 0; i
< sizeof(intern_type
); ++i
)
58 checksum
^= static_cast<unsigned char>(p
[i
]);
67 return from_next
== from_end
? std::codecvt_base::ok
68 : std::codecvt_base::partial
;
71 virtual std::codecvt_base::result
72 do_unshift(StateT
&, extern_type
* to
,
73 extern_type
*, extern_type
*& to_next
) const
76 return std::codecvt_base::ok
;
79 virtual std::codecvt_base::result
80 do_in(StateT
&, const extern_type
* from
,
81 const extern_type
* from_end
, const extern_type
*& from_next
,
82 intern_type
* to
, intern_type
* to_end
,
83 intern_type
*& to_next
) const
85 size_t len
= std::min(static_cast<size_t>(to_end
- to
),
86 static_cast<size_t>(from_end
- from
) / width
);
92 char* p
= reinterpret_cast<char*>(&tmp
);
93 unsigned char checksum
= 0;
95 for (std::size_t i
= 0; i
< sizeof(intern_type
); ++i
)
98 checksum
^= static_cast<unsigned char>(*f
++);
101 if (*f
++ != checksum
)
111 return len
? std::codecvt_base::error
:
112 (from_next
== from_end
? std::codecvt_base::ok
113 : std::codecvt_base::partial
);
117 do_encoding() const throw()
121 do_length(const StateT
&, const extern_type
* from
,
122 const extern_type
* end
, size_t max
) const
124 size_t len
= std::min(max
,
125 static_cast<size_t>(end
- from
) / width
);
130 unsigned char checksum
= 0;
132 for (std::size_t i
= 0; i
< sizeof(intern_type
); ++i
)
134 checksum
^= static_cast<unsigned char>(*from
++);
137 if (*from
++ != checksum
)
147 do_max_length() const throw()
151 do_always_noconv() const throw()
155 class Buf
: public std::wfilebuf
158 std::streamsize
pub_showmanyc()
159 { return showmanyc(); }
160 std::wfilebuf::int_type
pub_underflow()
161 { return underflow(); }
168 bool test
__attribute__((unused
)) = true;
171 fbout
.open("tmp_11603", ios_base::out
);
172 fbout
.sputn("aaaab", 5);
175 locale
loc(locale::classic(), new checksumcvt
<wchar_t>);
179 fb
.open("tmp_11603", ios_base::in
);
180 VERIFY( fb
.pub_showmanyc() == 1 );
184 wfilebuf::int_type ret
= fb
.pub_underflow();
185 VERIFY( ret
!= wfilebuf::traits_type::eof() );
187 ret
= fb
.pub_underflow();
188 VERIFY( ret
== wfilebuf::traits_type::eof() );