trunk/libstdc++-v3/testsuite/27_io/objects/char/3045.cc

   1 // 2001-06-05 Benjamin Kosnik  <bkoz@redhat.com>
   2
   3 // Copyright (C) 2001, 2002, 2003, 2009 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
  21 #include <fstream>
  22 #include <iostream>
  23 #include <testsuite_hooks.h>
  24
  25 class gnu_filebuf: public std::filebuf
  26 {
  27   int i;
  28 public:
  29   gnu_filebuf(int j = 1): i(j) { }
  30   ~gnu_filebuf() { --i; }
  31   int get_i() { return i;}
  32 };
  33
  34 const int initial = 4;
  35 gnu_filebuf buf(initial);
  36
  37 // libstdc++/3045, in a vague way.
  38 void test01()
  39 {
  40   bool test __attribute__((unused)) = true;
  41   int k1;
  42
  43   // 1 normal
  44   k1 = buf.get_i();
  45   VERIFY( k1 == initial );
  46   {
  47     std::cout.rdbuf(&buf);
  48   }
  49   k1 = buf.get_i();
  50   VERIFY( k1 == initial );
  51
  52   // 2 syncd off
  53   k1 = buf.get_i();
  54   VERIFY( k1 == initial );
  55   {
  56     std::cout.rdbuf(&buf);
  57     std::ios_base::sync_with_stdio(false); // make sure doesn't clobber buf
  58   }
  59   k1 = buf.get_i();
  60   VERIFY( k1 == initial );
  61
  62   // 3 callling init
  63   k1 = buf.get_i();
  64   VERIFY( k1 == initial );
  65   {
  66     std::cout.rdbuf(&buf);
  67     std::ios_base::Init make_sure_initialized;
  68   }
  69   k1 = buf.get_i();
  70   VERIFY( k1 == initial );
  71 }
  72
  73 int main()
  74 {
  75   test01();
  76   return 0;
  77 }