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

   1 // 2004-10-06  Paolo Carlini  <pcarlini@suse.de>
   2
   3 // Copyright (C) 2004-2023 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
  30   const unsigned max_size = 1 << 18;
  31
  32   char ref[max_size];
  33   memset(ref, '\0', max_size);
  34
  35   char src[max_size * 2];
  36   memset(src, '\1', max_size * 2);
  37
  38   for (unsigned i = 128; i <= max_size; i *= 2)
  39     {
  40       char* dest = new char[i * 2];
  41       memset(dest, '\0', i * 2);
  42
  43       stringbuf sbuf;
  44       sbuf.pubsetbuf(dest, i);
  45
  46       sbuf.sputn(src, i * 2);
  47       VERIFY( !memcmp(dest + i, ref, i) );
  48
  49       delete[] dest;
  50     }
  51 }
  52
  53 int main()
  54 {
  55   test01();
  56   return 0;
  57 }