main/libstdc++-v3/testsuite/27_io/ios_base/storage/11584.cc

   1 // 2004-01-25 jlquinn@gcc.gnu.org
   2
   3 // Copyright (C) 2004-2013 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 // 27.4.2.5 ios_base storage functions
  21
  22 #include <cstdlib>
  23 #include <new>
  24 #include <iostream>
  25 #include <testsuite_hooks.h>
  26
  27 int new_fails;
  28
  29 void* operator new(std::size_t n) throw (std::bad_alloc)
  30 {
  31   if (new_fails)
  32     throw std::bad_alloc();
  33   return malloc(n);
  34 }
  35 void* operator new[] (std::size_t n) throw (std::bad_alloc)
  36 { return operator new(n); }
  37
  38 void operator delete (void *p) throw() { free(p); }
  39 void operator delete[] (void *p) throw() { operator delete(p); }
  40
  41 int main ()
  42 {
  43   bool test __attribute__((unused)) = true;
  44   const int i = std::ios::xalloc();
  45   VERIFY( i >= 0 );
  46
  47   new_fails = 1;
  48
  49   // Successive accesses to failure storage clears to zero.
  50   std::cout.iword(100) = 69;
  51   VERIFY( std::cout.iword(100) == 0 );
  52
  53   // Access to pword failure storage shouldn't clear iword pword storage.
  54   long& lr = std::cout.iword(100);
  55   lr = 69;
  56
  57   void* pv = std::cout.pword(100);
  58   VERIFY( pv == 0 );
  59   VERIFY( lr == 69 );
  60
  61   return 0;
  62 }
  63