libstdc++-v3/testsuite/27_io/basic_filebuf/sputc/char/1-in.cc

   1 // 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
   2
   3 // Copyright (C) 2001-2020 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_01[] = "filebuf_virtuals-1.txt"; // file with data in it
  30
  31 void test05()
  32 {
  33   using namespace std;
  34   using namespace __gnu_test;
  35
  36   typedef filebuf::int_type     int_type;
  37   typedef filebuf::traits_type  traits_type;
  38
  39   int_type                      c3;
  40
  41   // int_type sputc(char_type c)
  42   // if out_cur not avail, return overflow(traits_type::to_int_type(c))
  43   // else, stores c at out_cur,
  44   // increments out_cur, and returns c as int_type
  45
  46   // in
  47   {
  48     constraint_filebuf fb_01;
  49     fb_01.open(name_01, ios_base::in);
  50     VERIFY( !fb_01.write_position() );
  51     c3 = fb_01.sputc('a');
  52     VERIFY( c3 == traits_type::eof() );
  53     VERIFY( !fb_01.write_position() );
  54    }
  55 }
  56
  57 int main()
  58 {
  59   test05();
  60   return 0;
  61 }