1 // 2000-06-29 bkoz
2 
3 // Copyright (C) 2000-2020 Free Software Foundation, Inc.
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 3, 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 COPYING3.  If not see
18 // <http://www.gnu.org/licenses/>.
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 // { dg-require-fileio "" }
26 
27 #include <istream>
28 #include <sstream>
29 #include <fstream>
30 #include <testsuite_hooks.h>
31 
test01()32 void test01()
33 {
34   using namespace std;
35   typedef ios::off_type off_type;
36   typedef ios::pos_type pos_type;
37 
38   const char str_lit01[] = "istream_seeks-1.tst";
39 
40   // in
41   istringstream ist1;
42   pos_type p3 = ist1.tellg();
43 
44   ifstream ifs1;
45   pos_type p4 = ifs1.tellg();
46 
47   // N.B. We implement the resolution of DR 453 and
48   // istringstream::tellg() doesn't fail.
49   VERIFY( p3 == pos_type(off_type(0)) );
50   VERIFY( p4 == pos_type(off_type(-1)) );
51 
52   // in
53   // test ctors leave things in the same positions...
54   istringstream ist2("bob_marley:kaya");
55   p3 = ist2.tellg();
56 
57   ifstream ifs2(str_lit01);
58   p4 = ifs2.tellg();
59 
60   VERIFY( p3 == p4 );
61 }
62 
main()63 int main()
64 {
65   test01();
66   return 0;
67 }
68