libstdc++-v3/testsuite/27_io/basic_istream/peek/char/6414.cc

   1 // 2000-06-29 bkoz
   2
   3 // Copyright (C) 2000, 2001, 2002, 2003, 2004 Free Software Foundation
   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 2, 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 COPYING.  If not, write to the Free
  18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19 // USA.
  20
  21 // 27.6.1.3 unformatted input functions
  22 // NB: ostream has a particular "seeks" category. Adopt this for istreams too.
  23 // @require@ %-*.tst %-*.txt
  24 // @diff@ %-*.tst %-*.txt
  25
  26 #include <istream>
  27 #include <fstream>
  28 #include <testsuite_hooks.h>
  29
  30 // fstreams
  31 void test04(void)
  32 {
  33   bool test __attribute__((unused)) = true;
  34   std::istream::pos_type pos01, pos02;
  35   const char str_lit01[] = "istream_seeks-1.txt";
  36   std::ifstream if01(str_lit01, std::ios_base::in | std::ios_base::out);
  37
  38   // libstdc++/6414
  39   if01.seekg(0, std::ios_base::beg);
  40   pos01 = if01.tellg();
  41   if01.peek();
  42   pos02 = if01.tellg();
  43   VERIFY( pos02 == pos01 );
  44 }
  45
  46 int main()
  47 {
  48   test04();
  49   return 0;
  50 }