1// Copyright (C) 2003 2// Free Software Foundation, Inc. 3// 4// This file is part of the GNU ISO C++ Library. This library is free 5// software; you can redistribute it and/or modify it under the 6// terms of the GNU General Public License as published by the 7// Free Software Foundation; either version 2, or (at your option) 8// any later version. 9 10// This library is distributed in the hope that it will be useful, 11// but WITHOUT ANY WARRANTY; without even the implied warranty of 12// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13// GNU General Public License for more details. 14 15// You should have received a copy of the GNU General Public License along 16// with this library; see the file COPYING. If not, write to the Free 17// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 18// USA. 19 20// 27.8.1.4 Overridden virtual functions 21 22#include <fstream> 23#include <locale> 24#include <testsuite_hooks.h> 25 26struct MyState 27{ 28}; 29 30struct MyCharTraits : std::char_traits<wchar_t> 31{ 32 typedef std::fpos<MyState> pos_type; 33 typedef MyState state_type; 34}; 35 36namespace std 37{ 38 template <> 39 class codecvt<wchar_t, char, MyState> : 40 public locale::facet, public codecvt_base 41 { 42 public: 43 typedef wchar_t intern_type; 44 typedef char extern_type; 45 typedef MyState state_type; 46 47 explicit codecvt(size_t refs = 0) 48 : locale::facet(refs) { } 49 50 result out(state_type& state, const intern_type* from, 51 const intern_type* from_end, const intern_type*& from_next, 52 extern_type* to, extern_type* to_limit, 53 extern_type*& to_next) const 54 { return do_out(state, from, from_end, from_next, 55 to, to_limit, to_next); } 56 57 result unshift(state_type& state, extern_type* to, extern_type* to_limit, 58 extern_type*& to_next) const 59 { return do_unshift(state, to, to_limit, to_next); } 60 61 result in(state_type& state, const extern_type* from, 62 const extern_type* from_end, const extern_type*& from_next, 63 intern_type* to, intern_type* to_limit, 64 intern_type*& to_next) const 65 { return do_in(state, from, from_end, from_next, 66 to, to_limit, to_next); } 67 68 int encoding() const throw() 69 { return do_encoding(); } 70 71 bool always_noconv() const throw() 72 { return do_always_noconv(); } 73 74 int length(state_type& state, const extern_type* from, 75 const extern_type* end, size_t max) const 76 { return do_length(state, from, end, max); } 77 78 int max_length() const throw() 79 { return do_max_length(); } 80 81 static locale::id id; 82 83 protected: 84 virtual ~codecvt(); 85 86 virtual result do_out(state_type&, const intern_type*, 87 const intern_type*, const intern_type*&, 88 extern_type*, extern_type*, extern_type*&) const 89 { return error; } 90 91 virtual result do_in(state_type&, const extern_type*, const extern_type*, 92 const extern_type*&, intern_type*, intern_type*, 93 intern_type*&) const 94 { return error; } 95 96 virtual result do_unshift(state_type&, extern_type*, extern_type*, 97 extern_type*&) const 98 { return noconv; } 99 100 virtual int do_encoding() const throw() 101 { return 1; } 102 103 virtual bool do_always_noconv() const throw() 104 { return false; } 105 106 virtual int do_length(state_type&, const extern_type* from, 107 const extern_type* end, size_t max) const 108 { 109 size_t len = end - from; 110 return std::min(max, len); 111 } 112 113 virtual int do_max_length() const throw() 114 { return 1; } 115 }; 116 117 locale::id codecvt<wchar_t, char, MyState>::id; 118 119 codecvt<wchar_t, char, MyState>::~codecvt() 120 { } 121} 122 123void test01() 124{ 125 bool test __attribute__((unused)) = true; 126 127 std::locale loc(std::locale::classic(), 128 new std::codecvt<wchar_t, char, MyState>); 129 std::basic_filebuf<wchar_t, MyCharTraits> fb; 130 fb.pubimbue(loc); 131 fb.open("tmp_11543", std::ios_base::out); 132 VERIFY( fb.is_open() ); 133 MyCharTraits::pos_type pos = fb.pubseekoff(0, std::ios_base::beg); 134 VERIFY( pos != MyCharTraits::pos_type(MyCharTraits::off_type(-1)) ); 135 fb.close(); 136} 137 138int main() 139{ 140 test01(); 141 return 0; 142} 143