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

   1 // 2010-11-18  Paolo Carlini  <paolo.carlini@oracle.com>
   2
   3 // Copyright (C) 2010-2017 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 #include <istream>
  21 #include <sstream>
  22 #include <testsuite_hooks.h>
  23
  24 // libstdc++/26211
  25 void test01()
  26 {
  27   using namespace std;
  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.good() );
  42
  43   iss.seekg(0, ios_base::beg);
  44   VERIFY( !iss.fail() );
  45   VERIFY( iss.tellg() == p0 );
  46
  47   iss >> oss.rdbuf();
  48   VERIFY( iss.rdstate() == iss.eofbit );
  49
  50   iss.seekg(p0);
  51   VERIFY( iss.good() );
  52
  53   iss.seekg(p0);
  54   VERIFY( !iss.fail() );
  55   VERIFY( iss.tellg() == p0 );
  56 }
  57
  58 int main()
  59 {
  60   test01();
  61   return 0;
  62 }