libstdc++-v3/testsuite/27_io/basic_istream/seekg/wchar_t/2.cc

   1 // Copyright (C) 2004-2024 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 // 27.6.1.3 unformatted input functions
  19 // DR 60 -- seekg does not effect calls to gcount
  20
  21 #include <istream>
  22 #include <sstream>
  23 #include <testsuite_hooks.h>
  24
  25 void test01()
  26 {
  27   using namespace std;
  28
  29   wistringstream ist(L"the lamb lies down on broadway");
  30   wios::pos_type pos = ist.tellg();
  31   ist.ignore(4);
  32   int count1 = ist.gcount();
  33   ist.seekg(pos);
  34   int count2 = ist.gcount();
  35   VERIFY( count1 == count2 );
  36   ist.seekg(wios::off_type(pos), wios::beg);
  37   count2 = ist.gcount();
  38   VERIFY( count1 == count2 );
  39 }
  40
  41 int main()
  42 {
  43   test01();
  44   return 0;
  45 }