libstdc++-v3/testsuite/27_io/basic_filebuf/setbuf/char/1.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
  26 class testbuf : public std::filebuf
  27 {
  28 public:
  29
  30   // Typedefs:
  31   typedef std::filebuf base_type;
  32   typedef base_type::traits_type traits_type;
  33   typedef base_type::char_type char_type;
  34
  35   testbuf(): base_type()
  36   { _M_mode = (std::ios_base::in | std::ios_base::out); }
  37
  38   bool
  39   check_pointers()
  40   {
  41     bool test = true;
  42     test = (this->pbase() == NULL);
  43     test &= (this->pptr() == NULL);
  44     return test;
  45   }
  46 };
  47
  48 const char name_01[] = "filebuf_virtuals-1.txt";
  49
  50 // Test overloaded virtual functions.
  51 void test05()
  52 {
  53   using namespace std;
  54   typedef std::filebuf::int_type        int_type;
  55   typedef std::filebuf::traits_type     traits_type;
  56   typedef std::filebuf::pos_type        pos_type;
  57   typedef std::filebuf::off_type        off_type;
  58   typedef size_t                        size_type;
  59
  60   bool                                  test = true;
  61
  62   int_type c1;
  63
  64   {
  65     testbuf                             f_tmp;
  66
  67     // setbuf
  68     // pubsetbuf(char_type* s, streamsize n)
  69     f_tmp.pubsetbuf(0,0);
  70     VERIFY( f_tmp.check_pointers() );
  71   }
  72
  73   {
  74     testbuf                             f_tmp;
  75
  76     f_tmp.open(name_01, ios_base::out | ios_base::in);
  77     int_type c1 = f_tmp.sbumpc();
  78
  79     // setbuf
  80     // pubsetbuf(char_type* s, streamsize n)
  81     f_tmp.pubsetbuf(0, 0);
  82     VERIFY( !f_tmp.check_pointers() );
  83   }
  84 }
  85
  86 main()
  87 {
  88   test05();
  89   return 0;
  90 }