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git.ipfire.org Git - thirdparty/gcc.git/blob - libstdc++-v3/testsuite/27_io/basic_filebuf/underflow/wchar_t/11603.cc
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1 // Copyright (C) 2003-2017 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 3, 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 COPYING3. If not see
16 // <http://www.gnu.org/licenses/>.
18 // 27.8.1.4 Overridden virtual functions
20 // { dg-require-binary-io "" }
24 #include <testsuite_hooks.h>
26 template <typename InternT
, typename StateT
= std::mbstate_t>
27 class checksumcvt
: public std::codecvt
<InternT
, char, StateT
>
29 typedef std::codecvt
<InternT
, char, StateT
> Base
;
30 static const std::size_t width
= sizeof(InternT
) + 1;
33 typedef InternT intern_type
;
34 typedef char extern_type
;
36 explicit checksumcvt(std::size_t refs
= 0)
41 virtual std::codecvt_base::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
);
53 reinterpret_cast<const char*>(from
);
54 unsigned char checksum
= 0;
56 for (std::size_t i
= 0; i
< sizeof(intern_type
); ++i
)
59 checksum
^= static_cast<unsigned char>(p
[i
]);
68 return from_next
== from_end
? std::codecvt_base::ok
69 : std::codecvt_base::partial
;
72 virtual std::codecvt_base::result
73 do_unshift(StateT
&, extern_type
* to
,
74 extern_type
*, extern_type
*& to_next
) const
77 return std::codecvt_base::ok
;
80 virtual std::codecvt_base::result
81 do_in(StateT
&, const extern_type
* from
,
82 const extern_type
* from_end
, const extern_type
*& from_next
,
83 intern_type
* to
, intern_type
* to_end
,
84 intern_type
*& to_next
) const
86 size_t len
= std::min(static_cast<size_t>(to_end
- to
),
87 static_cast<size_t>(from_end
- from
) / width
);
93 char* p
= reinterpret_cast<char*>(&tmp
);
94 unsigned char checksum
= 0;
96 for (std::size_t i
= 0; i
< sizeof(intern_type
); ++i
)
99 checksum
^= static_cast<unsigned char>(*f
++);
102 if (*f
++ != checksum
)
112 return len
? std::codecvt_base::error
:
113 (from_next
== from_end
? std::codecvt_base::ok
114 : std::codecvt_base::partial
);
118 do_encoding() const throw()
122 do_length(const StateT
&, const extern_type
* from
,
123 const extern_type
* end
, size_t max
) const
125 size_t len
= std::min(max
,
126 static_cast<size_t>(end
- from
) / width
);
131 unsigned char checksum
= 0;
133 for (std::size_t i
= 0; i
< sizeof(intern_type
); ++i
)
135 checksum
^= static_cast<unsigned char>(*from
++);
138 if (*from
++ != checksum
)
148 do_max_length() const throw()
152 do_always_noconv() const throw()
156 class Buf
: public std::wfilebuf
159 std::streamsize
pub_showmanyc()
160 { return showmanyc(); }
161 std::wfilebuf::int_type
pub_underflow()
162 { return underflow(); }
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() );