libstdc++-v3/testsuite/27_io/basic_istream/readsome/char/6746-2.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 // The ARM simulator does not provide support for "fstat", which
  21 // causes "in_avail" to return an incorrect value.
  22 // { dg-do run { xfail arm*-*-elf arm*-*-eabi } }
  23
  24 // 27.6.1.3 unformatted input functions
  25 // @require@ %-*.tst %-*.txt
  26 // @diff@ %-*.tst %-*.txt
  27
  28 // { dg-require-fileio "" }
  29 // { dg-require-binary-io "" }
  30
  31 #include <istream>
  32 #include <fstream>
  33 #include <testsuite_hooks.h>
  34
  35 // libstdc++/6746
  36 void test13()
  37 {
  38   using namespace std;
  39   streamsize sum = 0;
  40   ifstream ifs("istream_unformatted-1.tst");
  41
  42   // test01
  43   size_t i = ifs.rdbuf()->in_avail();
  44   VERIFY( i != 0 );
  45
  46   // test02
  47   streamsize extracted;
  48   do
  49     {
  50       char buf[1024];
  51       extracted = ifs.readsome(buf, sizeof buf);
  52       sum += extracted;
  53     }
  54   while (ifs.good() && extracted);
  55   VERIFY( sum != 0 );
  56 }
  57
  58 int
  59 main()
  60 {
  61   test13();
  62   return 0;
  63 }