1 // { dg-do run { target c++14 } } 2 // { dg-require-fileio "" } 3 4 // Copyright (C) 2013-2021 Free Software Foundation, Inc. 5 // 6 // This file is part of the GNU ISO C++ Library. This library is free 7 // software; you can redistribute it and/or modify it under the 8 // terms of the GNU General Public License as published by the 9 // Free Software Foundation; either version 3, or (at your option) 10 // any later version. 11 12 // This library is distributed in the hope that it will be useful, 13 // but WITHOUT ANY WARRANTY; without even the implied warranty of 14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 // GNU General Public License for more details. 16 17 // You should have received a copy of the GNU General Public License along 18 // with this library; see the file COPYING3. If not see 19 // <http://www.gnu.org/licenses/>. 20 21 // inserters 22 23 // NB: This file is predicated on sstreams, istreams, and ostreams 24 // working, not to mention other major details like char_traits, and 25 // all of the string_view class. 26 27 #include <experimental/string_view> 28 #include <string> 29 #include <fstream> 30 #include <iostream> 31 #include <testsuite_hooks.h> 32 33 // testing basic_filebuf::xsputn via stress testing with large string_views 34 // based on a bug report libstdc++ 9 35 // mode == out 36 void test05(std::size_t size)37test05(std::size_t size) 38 { 39 const char filename[] = "inserters_extractors-2.txt"; 40 const wchar_t fillc = L'f'; 41 std::wofstream ofs(filename); 42 std::wstring str(size, fillc); 43 std::experimental::wstring_view strv(str); 44 45 // sanity checks 46 VERIFY( str.size() == size ); 47 VERIFY( ofs.good() ); 48 49 // stress test 50 ofs << str << std::endl; 51 if (!ofs.good()) 52 VERIFY( false ); 53 54 ofs << str << std::endl; 55 if (!ofs.good()) 56 VERIFY( false ); 57 58 VERIFY( str.size() == size ); 59 VERIFY( ofs.good() ); 60 61 ofs.close(); 62 63 // sanity check on the written file 64 std::wifstream ifs(filename); 65 std::size_t count = 0; 66 wchar_t c; 67 while (count <= (2 * size) + 4) 68 { 69 ifs >> c; 70 if (ifs.good() && c == fillc) 71 { 72 ++count; 73 c = '0'; 74 } 75 else 76 break; 77 } 78 79 VERIFY( count == 2 * size ); 80 } 81 82 int main()83main() 84 { 85 test05(1); 86 test05(1000); 87 test05(10000); 88 89 return 0; 90 } 91