libstdc++-v3/testsuite/27_io/basic_stringbuf/setbuf/char/4.cc

   1 // 2004-10-06  Paolo Carlini  <pcarlini@suse.de>
   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 // 27.8.1.4 Overridden virtual functions
  21
  22 #include <sstream>
  23 #include <cstring>
  24 #include <testsuite_hooks.h>
  25
  26 void test01()
  27 {
  28   using namespace std;
  29   bool test __attribute__((unused)) = true;
  30
  31   const unsigned max_size = 1 << 18;
  32
  33   char ref[max_size];
  34   memset(ref, '\0', max_size);
  35
  36   char src[max_size * 2];
  37   memset(src, '\1', max_size * 2);
  38
  39   for (unsigned i = 128; i <= max_size; i *= 2)
  40     {
  41       char* dest = new char[i * 2];
  42       memset(dest, '\0', i * 2);
  43
  44       stringbuf sbuf;
  45       sbuf.pubsetbuf(dest, i);
  46
  47       sbuf.sputn(src, i * 2);
  48       VERIFY( !memcmp(dest + i, ref, i) );
  49
  50       delete[] dest;
  51     }
  52 }
  53
  54 int main()
  55 {
  56   test01();
  57   return 0;
  58 }