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

   1 // 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
   2
   3 // Copyright (C) 2001-2024 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 // 27.8.1.4 Overridden virtual functions
  21
  22 // { dg-require-fileio "" }
  23
  24 #include <fstream>
  25 #include <testsuite_hooks.h>
  26
  27 class testbuf : public std::filebuf
  28 {
  29 public:
  30
  31   // Typedefs:
  32   typedef std::filebuf base_type;
  33   typedef base_type::traits_type traits_type;
  34   typedef base_type::char_type char_type;
  35
  36   testbuf(): base_type()
  37   { _M_mode = (std::ios_base::in | std::ios_base::out); }
  38
  39   bool
  40   check_pointers()
  41   {
  42     bool test = true;
  43     test = (!this->pbase());
  44     test &= (!this->pptr());
  45     return test;
  46   }
  47 };
  48
  49 const char name_01[] = "filebuf_virtuals-1.txt";
  50
  51 // Test overloaded virtual functions.
  52 void test05()
  53 {
  54   using namespace std;
  55   typedef std::filebuf::int_type        int_type;
  56   typedef std::filebuf::traits_type     traits_type;
  57   typedef std::filebuf::pos_type        pos_type;
  58   typedef std::filebuf::off_type        off_type;
  59   typedef size_t                        size_type;
  60
  61   {
  62     testbuf                             f_tmp;
  63
  64     // setbuf
  65     // pubsetbuf(char_type* s, streamsize n)
  66     f_tmp.pubsetbuf(0,0);
  67     VERIFY( f_tmp.check_pointers() );
  68   }
  69
  70   {
  71     testbuf                             f_tmp;
  72
  73     f_tmp.open(name_01, ios_base::out | ios_base::in);
  74     f_tmp.sbumpc();
  75
  76     // setbuf
  77     // pubsetbuf(char_type* s, streamsize n)
  78     f_tmp.pubsetbuf(0, 0);
  79     VERIFY( f_tmp.check_pointers() );
  80   }
  81 }
  82
  83 int main()
  84 {
  85   test05();
  86   return 0;
  87 }