libstdc++-v3/testsuite/27_io/basic_ostream/tellp/char/1.cc

   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 // 27.6.2.4 basic_ostream seek members
  21
  22 // { dg-require-fileio "" }
  23
  24 #include <ostream>
  25 #include <sstream>
  26 #include <fstream>
  27 #include <testsuite_hooks.h>
  28
  29 void test01()
  30 {
  31   using namespace std;
  32   typedef ios::off_type off_type;
  33   typedef ios::pos_type pos_type;
  34
  35   const char str_lit01[] = "ostream_seeks-1.txt";
  36
  37   // out
  38   ostringstream ost1;
  39   pos_type p1 = ost1.tellp();
  40
  41   ofstream ofs1;
  42   pos_type p2 = ofs1.tellp();
  43
  44   // N.B. We implement the resolution of DR 453 and
  45   // ostringstream::tellp() doesn't fail.
  46   VERIFY( p1 == pos_type(off_type(0)) );
  47   VERIFY( p2 == pos_type(off_type(-1)) );
  48
  49   // out
  50   // test ctors leave things in the same positions...
  51   ostringstream ost2("bob_marley:kaya");
  52   p1 = ost2.tellp();
  53
  54   ofstream ofs2(str_lit01);
  55   p2 = ofs2.tellp();
  56
  57   VERIFY( p1 == p2 );
  58 }
  59
  60 int main()
  61 {
  62   test01();
  63   return 0;
  64 }