1 // Copyright (C) 2003-2013 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
23 #include <testsuite_hooks.h>
25 template <typename InternT, typename StateT = mbstate_t>
26 class checksumcvt : public std::codecvt<InternT, char, StateT>
28 typedef std::codecvt<InternT, char, StateT> Base;
29 static const size_t width = sizeof(InternT) + 1;
32 typedef InternT intern_type;
33 typedef char extern_type;
35 explicit checksumcvt(size_t refs = 0)
40 virtual typename std::codecvt<InternT, char, StateT>::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);
51 const char* p = reinterpret_cast<const char*>(from);
52 unsigned char checksum = 0;
54 for (size_t i = 0; i < sizeof(intern_type); ++i)
57 checksum ^= static_cast<unsigned char>(p[i]);
66 return from_next == from_end ? std::codecvt<InternT, char, StateT>::ok
67 : std::codecvt<InternT, char, StateT>::partial;
70 virtual typename std::codecvt<InternT, char, StateT>::result
71 do_unshift(StateT&, extern_type* to,
72 extern_type*, extern_type*& to_next) const
75 return std::codecvt<InternT, char, StateT>::ok;
78 virtual typename std::codecvt<InternT, char, StateT>::result
79 do_in(StateT&, const extern_type* from,
80 const extern_type* from_end, const extern_type*& from_next,
81 intern_type* to, intern_type* to_end,
82 intern_type*& to_next) const
84 size_t len = std::min(static_cast<size_t>(to_end - to),
85 static_cast<size_t>(from_end - from) / width);
91 char* p = reinterpret_cast<char*>(&tmp);
92 unsigned char checksum = 0;
94 for (size_t i = 0; i < sizeof(intern_type); ++i)
97 checksum ^= static_cast<unsigned char>(*f++);
100 if (*f++ != checksum)
110 return len ? std::codecvt<InternT, char, StateT>::error :
111 (from_next == from_end ? std::codecvt<InternT, char, StateT>::ok
112 : std::codecvt<InternT, char, StateT>::partial);
116 do_encoding() const throw()
120 do_length(StateT&, const extern_type* from,
121 const extern_type* end, size_t max) const
123 size_t len = std::min(max, static_cast<size_t>(end - from) / width);
128 unsigned char checksum = 0;
130 for (size_t i = 0; i < sizeof(intern_type); ++i)
132 checksum ^= static_cast<unsigned char>(*from++);
135 if (*from++ != checksum)
145 do_max_length() const throw()
149 do_always_noconv() const throw()
153 // libstdc++/11544 (invalid byte sequence in file)
157 bool test __attribute__((unused)) = true;
159 locale loc(locale::classic(), new checksumcvt<wchar_t>);
161 const char* name = "tmp_11544-2";
163 FILE* f = fopen(name, "w");
164 VERIFY( fwrite("aaaab", 1, 5, f) == 5 );
173 VERIFY( !in.good() );