1 // Copyright (C) 2004-2021 Free Software Foundation, Inc. 2 // 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) 7 // any later version. 8 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. 13 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/>. 17 18 // { dg-require-fileio "" } 19 20 // 27.6.1.3 unformatted input functions 21 // NB: ostream has a particular "seeks" category. Adopt this for istreams too. 22 // @require@ %-*.tst %-*.txt 23 // @diff@ %-*.tst %-*.txt 24 25 #include <istream> 26 #include <sstream> 27 #include <fstream> 28 #include <testsuite_hooks.h> 29 test01()30void test01() 31 { 32 using namespace std; 33 typedef ios::off_type off_type; 34 typedef ios::pos_type pos_type; 35 36 const char str_lit01[] = "wistream_seeks-1.tst"; 37 38 // in 39 wistringstream ist1; 40 pos_type p3 = ist1.tellg(); 41 42 wifstream ifs1; 43 pos_type p4 = ifs1.tellg(); 44 45 // N.B. We implement the resolution of DR 453 and 46 // istringstream::tellg() doesn't fail. 47 VERIFY( p3 == pos_type(off_type(0)) ); 48 VERIFY( p4 == pos_type(off_type(-1)) ); 49 50 // in 51 // test ctors leave things in the same positions... 52 wistringstream ist2(L"bob_marley:kaya"); 53 p3 = ist2.tellg(); 54 55 wifstream ifs2(str_lit01); 56 p4 = ifs2.tellg(); 57 58 VERIFY( p3 == p4 ); 59 } 60 main()61int main() 62 { 63 test01(); 64 return 0; 65 } 66