libstdc++-v3/testsuite/27_io/basic_istream/readsome/char/6746-1.cc

   1 // 1999-08-11 bkoz
   2
   3 // Copyright (C) 1999-2024 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 // 27.6.1.3 unformatted input functions
  21
  22 #include <istream>
  23 #include <sstream>
  24 #include <testsuite_hooks.h>
  25
  26 // libstdc++/6746
  27 void test12()
  28 {
  29   using namespace std;
  30   streamsize sum = 0;
  31   istringstream iss("shamma shamma");
  32
  33   // test01
  34   size_t i = iss.rdbuf()->in_avail();
  35   VERIFY( i != 0 );
  36
  37   // test02
  38   streamsize extracted;
  39   do
  40     {
  41       char buf[1024];
  42       extracted = iss.readsome(buf, sizeof buf);
  43       sum += extracted;
  44     }
  45   while (iss.good() && extracted);
  46   VERIFY( sum != 0 );
  47 }
  48
  49 int
  50 main()
  51 {
  52   test12();
  53   return 0;
  54 }