1// 2003-02-06 Petur Runolfsson <peturr02@ru.is> 2 3// Copyright (C) 2003 Free Software Foundation 4// 5// This file is part of the GNU ISO C++ Library. This library is free 6// software; you can redistribute it and/or modify it under the 7// terms of the GNU General Public License as published by the 8// Free Software Foundation; either version 2, or (at your option) 9// any later version. 10 11// This library is distributed in the hope that it will be useful, 12// but WITHOUT ANY WARRANTY; without even the implied warranty of 13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14// GNU General Public License for more details. 15 16// You should have received a copy of the GNU General Public License along 17// with this library; see the file COPYING. If not, write to the Free 18// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 19// USA. 20 21// 22.2.1.5 - Template class codecvt [lib.locale.codecvt] 22 23#include <locale> 24#include <testsuite_hooks.h> 25 26// Need to explicitly set the state(mbstate_t) to zero. 27// How to do this is not specified by the ISO C99 standard, so we 28// might need to add some operators to make the intuiative case 29// work: 30// w_codecvt::state_type state00; 31// state00 = 0; 32// or, can use this explicit "C" initialization: 33// w_codecvt::state_type state01 = {0, 0}; 34// .. except Ulrich says: Use memset. Always use memset. Feel the force... 35void 36zero_state(std::mbstate_t& state) 37{ std::memset(&state, 0, sizeof(std::mbstate_t)); } 38 39bool length_called = false; 40 41class length_codecvt : public std::codecvt<wchar_t, char, std::mbstate_t> 42{ 43 typedef std::codecvt<wchar_t, char, std::mbstate_t> w_codecvt; 44 45public: 46 // DR75: type of first argument of do_length is state_type& 47 virtual int do_length(state_type& state, const extern_type* from, 48 const extern_type* end, std::size_t max) const 49 { 50 length_called = true; 51 return w_codecvt::do_length(state, from, end, max); 52 } 53}; 54 55// Required instantiation 56// codecvt<wchar_t, char, mbstate_t> 57// 58// libstdc++/9224 59void test06() 60{ 61 using namespace std; 62 typedef codecvt<wchar_t, char, mbstate_t> w_codecvt; 63 typedef char ext_type; 64 65 bool test __attribute__((unused)) = true; 66 const ext_type* e_lit = "black pearl jasmine tea"; 67 int size = strlen(e_lit); 68 69 locale loc; 70 loc = locale(loc, new length_codecvt); 71 const w_codecvt* cvt = &use_facet<w_codecvt>(loc); 72 73 w_codecvt::state_type state04; 74 zero_state(state04); 75 length_called = false; 76 cvt->length(state04, e_lit, e_lit + size, 5); 77 VERIFY( length_called ); 78} 79 80int main () 81{ 82 test06(); 83 return 0; 84} 85