gomp-20050608-branch/libstdc++-v3/testsuite/27_io/ios_base/storage/11584.cc

   1 // 2004-01-25 jlquinn@gcc.gnu.org
   2
   3 // Copyright (C) 2004, 2005 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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  19 // USA.
  20
  21 // 27.4.2.5 ios_base storage functions
  22
  23 #include <cstdlib>
  24 #include <new>
  25 #include <iostream>
  26 #include <testsuite_hooks.h>
  27
  28 int new_fails;
  29
  30 void* operator new(std::size_t n) throw (std::bad_alloc)
  31 {
  32   if (new_fails)
  33     throw std::bad_alloc();
  34   return malloc(n);
  35 }
  36 void* operator new[] (std::size_t n) throw (std::bad_alloc)
  37 { return operator new(n); }
  38
  39 void operator delete (void *p) throw() { free(p); }
  40 void operator delete[] (void *p) throw() { operator delete(p); }
  41
  42 int main ()
  43 {
  44   bool test __attribute__((unused)) = true;
  45   const int i = std::ios::xalloc();
  46   VERIFY( i >= 0 );
  47
  48   new_fails = 1;
  49
  50   // Successive accesses to failure storage clears to zero.
  51   std::cout.iword(100) = 69;
  52   VERIFY( std::cout.iword(100) == 0 );
  53
  54   // Access to pword failure storage shouldn't clear iword pword storage.
  55   long& lr = std::cout.iword(100);
  56   lr = 69;
  57
  58   void* pv = std::cout.pword(100);
  59   VERIFY( pv == 0 );
  60   VERIFY( lr == 69 );
  61
  62   return 0;
  63 }
  64