libstdc++-v3/testsuite/27_io/ios_base/sync_with_stdio/2.cc

   1 // 1999-05-21 bkoz
   2 // 2000-05-21 Benjamin Kosnik  <bkoz@redhat.com>
   3 // 2001-01-17 Loren J. Rittle  <ljrittle@acm.org>
   4
   5 // Copyright (C) 1999, 2000, 2001, 2003 Free Software Foundation
   6 //
   7 // This file is part of the GNU ISO C++ Library.  This library is free
   8 // software; you can redistribute it and/or modify it under the
   9 // terms of the GNU General Public License as published by the
  10 // Free Software Foundation; either version 2, or (at your option)
  11 // any later version.
  12
  13 // This library is distributed in the hope that it will be useful,
  14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 // GNU General Public License for more details.
  17
  18 // You should have received a copy of the GNU General Public License along
  19 // with this library; see the file COPYING.  If not, write to the Free
  20 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  21 // USA.
  22
  23 // 27.4.2.4 ios_base static members
  24 // @require@ %-*.tst
  25 // @diff@ %-*.tst %-*.txt
  26
  27 #include <cstdio>
  28 #include <sstream>
  29 #include <iostream>
  30 #include <testsuite_hooks.h>
  31
  32 // N.B. Once we have called sync_with_stdio(false), we can never go back.
  33
  34 void test02()
  35 {
  36   bool test = true;
  37
  38   std::stringbuf        strbuf01;
  39   std::ios              ios01(&strbuf01);
  40
  41   // 1: basic invocation
  42   VERIFY( ios01.sync_with_stdio() );
  43   VERIFY( ios01.sync_with_stdio(false) ); //returns previous state
  44
  45   // 2: need to test interleaving of C and C++ io on a file object.
  46   VERIFY( std::cout.good() );
  47   VERIFY( !std::cout.sync_with_stdio(0) );
  48   VERIFY( std::cout.good() );
  49   VERIFY( !std::cout.sync_with_stdio(0) );
  50   VERIFY( std::cout.good() );
  51 }
  52
  53 int main(void)
  54 {
  55   test02();
  56   return 0;
  57 }