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()30 void 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()61 int main()
62 {
63   test01();
64   return 0;
65 }
66