libstdc++-v3/testsuite/27_io/basic_filebuf/sgetc/char/2-out.cc

   1 // 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
   2
   3 // Copyright (C) 2001-2014 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 // 27.8.1.4 Overridden virtual functions
  21
  22 #include <fstream>
  23 #include <testsuite_hooks.h>
  24 #include <testsuite_io.h>
  25
  26 // @require@ %-*.tst %-*.txt
  27 // @diff@ %-*.tst %*.txt
  28
  29 const char name_02[] = "tmp_sgetc_2out.tst"; // empty file, need to create
  30
  31 // Test overloaded virtual functions.
  32 void test05()
  33 {
  34   using namespace std;
  35   using namespace __gnu_test;
  36   typedef std::filebuf::int_type        int_type;
  37   typedef filebuf::traits_type          traits_type;
  38
  39   bool test __attribute__((unused)) = true;
  40   int_type                      c1, c2;
  41
  42   // int_type sgetc()
  43   // if read_cur not avail, return uflow(), else return *read_cur
  44
  45   // out
  46   {
  47     constraint_filebuf fb_02; // out
  48     fb_02.pubsetbuf(0, 0);
  49     fb_02.open(name_02, ios::out | ios::trunc);
  50     VERIFY( fb_02.unbuffered() );
  51     VERIFY( !fb_02.read_position() );
  52     c1 = fb_02.sgetc();
  53     VERIFY( c1 == traits_type::eof() );
  54     c2 = fb_02.sgetc();
  55     VERIFY( c2 == traits_type::eof() );
  56     fb_02.sbumpc();
  57     c1 = fb_02.sbumpc();
  58     c2 = fb_02.sgetc();
  59     VERIFY( c1 == c2 );
  60     VERIFY( fb_02.unbuffered() );
  61     VERIFY( !fb_02.read_position() );
  62   }
  63 }
  64
  65 int main()
  66 {
  67   test05();
  68   return 0;
  69 }