libstdc++-v3/testsuite/27_io/types/3.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 // 27.4.3  streamoff
  19
  20 #include <ios>
  21 #include <limits>
  22 #include <testsuite_hooks.h>
  23
  24 void check(std::streamsize n)
  25 {
  26   VERIFY( std::streamsize(std::streamoff(n)) == n );
  27 }
  28
  29 void test03()
  30 {
  31   check(0);
  32   check(-1);
  33   check(1);
  34   check(std::numeric_limits<std::streamsize>::min());
  35   check(std::numeric_limits<std::streamsize>::min() + 1);
  36   check(std::numeric_limits<std::streamsize>::min() / 2);
  37   check(std::numeric_limits<std::streamsize>::max());
  38   check(std::numeric_limits<std::streamsize>::max() - 1);
  39   check(std::numeric_limits<std::streamsize>::max() / 2);
  40 }
  41
  42 int main()
  43 {
  44   test03();
  45   return 0;
  46 }