1 // Copyright (C) 2003 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
19 // 27.8.1.4 Overridden virtual functions
24 #include <testsuite_hooks.h>
26 template <typename InternT
, typename StateT
= mbstate_t>
27 class checksumcvt
: public std::codecvt
<InternT
, char, StateT
>
29 typedef std::codecvt
<InternT
, char, StateT
> Base
;
30 static const size_t width
= sizeof(InternT
) + 1;
33 typedef InternT intern_type
;
34 typedef char extern_type
;
36 explicit checksumcvt(size_t refs
= 0)
41 virtual typename
std::codecvt
<InternT
, char, StateT
>::result
42 do_out(StateT
&, const intern_type
* from
,
43 const intern_type
* from_end
, const intern_type
*& from_next
,
44 extern_type
* to
, extern_type
* to_end
,
45 extern_type
*& to_next
) const
47 size_t len
= std::min(static_cast<size_t>(from_end
- from
),
48 static_cast<size_t>(to_end
- to
) / width
);
52 const char* p
= reinterpret_cast<const char*>(from
);
53 unsigned char checksum
= 0;
55 for (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
<InternT
, char, StateT
>::ok
68 : std::codecvt
<InternT
, char, StateT
>::partial
;
71 virtual typename
std::codecvt
<InternT
, char, StateT
>::result
72 do_unshift(StateT
&, extern_type
* to
,
73 extern_type
*, extern_type
*& to_next
) const
76 return std::codecvt
<InternT
, char, StateT
>::ok
;
79 virtual typename
std::codecvt
<InternT
, char, StateT
>::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 (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
<InternT
, char, StateT
>::error
:
112 (from_next
== from_end
? std::codecvt
<InternT
, char, StateT
>::ok
113 : std::codecvt
<InternT
, char, StateT
>::partial
);
117 do_encoding() const throw()
121 do_length(StateT
&, const extern_type
* from
,
122 const extern_type
* end
, size_t max
) const
124 size_t len
= std::min(max
, static_cast<size_t>(end
- from
) / width
);
129 unsigned char checksum
= 0;
131 for (size_t i
= 0; i
< sizeof(intern_type
); ++i
)
133 checksum
^= static_cast<unsigned char>(*from
++);
136 if (*from
++ != checksum
)
146 do_max_length() const throw()
150 do_always_noconv() const throw()
154 // libstdc++/11544 (invalid byte sequence in file)
158 bool test
__attribute__((unused
)) = true;
160 locale
loc(locale::classic(), new checksumcvt
<wchar_t>);
162 const char* name
= "tmp_11544-2";
164 FILE* f
= fopen(name
, "w");
165 fwrite("aaaab", 1, 5, f
);
174 VERIFY( !in
.good() );