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

   1 // Copyright (C) 2004-2021 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 // 27.6.1.3 unformatted input functions
  19
  20 #include <istream>
  21 #include <sstream>
  22 #include <testsuite_hooks.h>
  23
  24 // libstdc++/6746
  25 void test12()
  26 {
  27   using namespace std;
  28   streamsize sum = 0;
  29   wistringstream iss(L"shamma shamma");
  30
  31   // test01
  32   size_t i = iss.rdbuf()->in_avail();
  33   VERIFY( i != 0 );
  34
  35   // test02
  36   streamsize extracted;
  37   do
  38     {
  39       wchar_t buf[1024];
  40       extracted = iss.readsome(buf, sizeof(buf) / sizeof(wchar_t));
  41       sum += extracted;
  42     }
  43   while (iss.good() && extracted);
  44   VERIFY( sum != 0 );
  45 }
  46
  47 int
  48 main()
  49 {
  50   test12();
  51   return 0;
  52 }