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

   1 // 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
   2
   3 // Copyright (C) 2001, 2002, 2003 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 2, 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 COPYING.  If not, write to the Free
  18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19 // USA.
  20
  21 // 27.8.1.4 Overridden virtual functions
  22
  23 #include <fstream>
  24 #include <testsuite_hooks.h>
  25 #include <testsuite_io.h>
  26
  27 // @require@ %-*.tst %-*.txt
  28 // @diff@ %-*.tst %*.txt
  29
  30 const char name_01[] = "sgetc.txt"; // file with data in it
  31 const char name_03[] = "tmp_sgetc_2io.tst"; // empty file, need to create
  32
  33 // Test overloaded virtual functions.
  34 void test05()
  35 {
  36   using namespace std;
  37   using namespace __gnu_test;
  38   typedef std::filebuf::int_type        int_type;
  39   typedef filebuf::traits_type          traits_type;
  40
  41   bool test __attribute__((unused)) = true;
  42   int_type                      c1, c2, c3;
  43
  44   // int_type sgetc()
  45   // if read_cur not avail, return uflow(), else return *read_cur
  46
  47   // in | out 1
  48   {
  49     constraint_filebuf fb_03; // in | out
  50     fb_03.pubsetbuf(0, 0);
  51     fb_03.open(name_03, ios::out | ios::in | ios::trunc);
  52     VERIFY( fb_03.unbuffered() );
  53     c1 = fb_03.sgetc();
  54     c2 = fb_03.sbumpc();
  55     VERIFY( c1 == traits_type::eof() );
  56     VERIFY( c1 == c2 );
  57     VERIFY( fb_03.unbuffered() );
  58   }
  59
  60   // in | out 2
  61   {
  62     constraint_filebuf fb_01; // in
  63     fb_01.pubsetbuf(0, 0);
  64     fb_01.open(name_01, ios::in | ios::out);
  65     VERIFY( fb_01.unbuffered() );
  66     c1 = fb_01.sgetc();
  67     VERIFY( c1 == '/' );
  68     c2 = fb_01.sgetc();
  69     VERIFY( c1 == c2 );
  70     fb_01.sbumpc();
  71     c1 = fb_01.sbumpc();
  72     c2 = fb_01.sgetc();
  73     c3 = fb_01.sgetc();
  74     VERIFY( c1 == '/' );
  75     VERIFY( c2 == ' ' );
  76     VERIFY( c3 == ' ' );
  77     VERIFY( fb_01.unbuffered() );
  78   }
  79 }
  80
  81 int main()
  82 {
  83   test05();
  84   return 0;
  85 }