libstdc++-v3/testsuite/27_io/basic_istream/seekg/wchar_t/26211.cc

   1 // Copyright (C) 2006 Free Software Foundation
   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 2, 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 COPYING.  If not, write to the Free
  16 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  17 // USA.
  18
  19 #include <istream>
  20 #include <sstream>
  21 #include <testsuite_hooks.h>
  22
  23 // libstdc++/26211
  24 void test01()
  25 {
  26   using namespace std;
  27   bool test __attribute__((unused)) = true;
  28
  29   typedef wistringstream::pos_type pos_type;
  30
  31   wistringstream iss(L"Duos for Doris");
  32   wostringstream oss;
  33
  34   const pos_type p0 = iss.tellg();
  35   VERIFY( p0 == pos_type(0) );
  36
  37   iss >> oss.rdbuf();
  38   VERIFY( iss.rdstate() == iss.eofbit );
  39
  40   iss.seekg(0, ios_base::beg);
  41   VERIFY( iss.fail() );
  42
  43   iss.clear();
  44   iss.seekg(0, ios_base::beg);
  45   VERIFY( !iss.fail() );
  46   VERIFY( iss.tellg() == p0 );
  47
  48   iss >> oss.rdbuf();
  49   VERIFY( iss.rdstate() == iss.eofbit );
  50
  51   iss.seekg(p0);
  52   VERIFY( iss.fail() );
  53
  54   iss.clear();
  55   iss.seekg(p0);
  56   VERIFY( !iss.fail() );
  57   VERIFY( iss.tellg() == p0 );
  58 }
  59
  60 int main()
  61 {
  62   test01();
  63   return 0;
  64 }