libstdc++-v3/testsuite/27_io/basic_filebuf/showmanyc/char/9533-2.cc

   1 // Copyright (C) 2003-2022 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // 27.8.1.4 Overridden virtual functions
  19
  20 #include <fstream>
  21 #include <testsuite_hooks.h>
  22
  23 // libstdc++/9533
  24 void test_02()
  25 {
  26   using namespace std;
  27   const char* name = "tmp_file1";
  28   const char* strlit = "0123456789";
  29
  30   filebuf fb;
  31
  32   int written = 0;
  33   fb.open(name, ios_base::out | ios_base::trunc);
  34   for (int i = 0; i < BUFSIZ; ++i)
  35     written += fb.sputn(strlit, 10);
  36   fb.close();
  37
  38   int read = 0;
  39   int n = 0;
  40   char buf[10];
  41   fb.open(name, ios_base::in);
  42   do
  43     {
  44       n = fb.sgetn(buf, sizeof(buf));
  45       read += n;
  46     }
  47   while (n);
  48
  49   VERIFY( read == written );
  50 }
  51
  52 int
  53 main()
  54 {
  55   test_02();
  56   return 0;
  57 }