libstdc++-v3/testsuite/27_io/basic_filebuf/close/char/3.cc

   1 // 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
   2
   3 // Copyright (C) 2001-2013 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
  25 // @require@ %-*.tst %-*.txt
  26 // @diff@ %-*.tst %*.txt
  27
  28 // NB: This test assumes that _M_buf_size == 40, and not the usual
  29 // buffer_size length of BUFSIZ (8192), so that overflow/underflow can be
  30 // simulated a bit more readily.
  31 // NRB (Nota Really Bene): setting it to 40 breaks the test, as intended.
  32 const int buffer_size = 8192;
  33 //const int buffer_size = 40;
  34
  35 const char name_01[] = "filebuf_virtuals-1.txt"; // file with data in it
  36 const char name_02[] = "filebuf_virtuals-2.txt"; // empty file, need to create
  37 const char name_03[] = "filebuf_virtuals-3.txt"; // empty file, need to create
  38
  39 class derived_filebuf: public std::filebuf
  40 {
  41  public:
  42   void
  43   set_size(int_type __size) { _M_buf_size = __size; }
  44 };
  45
  46 derived_filebuf fb_01; // in
  47 derived_filebuf fb_02; // out
  48 derived_filebuf fb_03; // in | out
  49
  50 // Initialize filebufs to be the same size regardless of platform.
  51 void test03()
  52 {
  53   fb_01.set_size(buffer_size);
  54   fb_02.set_size(buffer_size);
  55   fb_03.set_size(buffer_size);
  56 }
  57
  58 // Test overloaded virtual functions.
  59 void test05()
  60 {
  61   typedef std::filebuf::int_type        int_type;
  62   typedef std::filebuf::traits_type     traits_type;
  63   typedef std::filebuf::pos_type        pos_type;
  64   typedef std::filebuf::off_type        off_type;
  65   typedef size_t                        size_type;
  66
  67   bool test __attribute__((unused)) = true;
  68   std::filebuf                          f_tmp;
  69
  70   fb_01.open(name_01, std::ios_base::in);
  71   fb_02.open(name_02, std::ios_base::out | std::ios_base::trunc);
  72   fb_03.open(name_03, std::ios_base::out | std::ios_base::in | std::ios_base::trunc);
  73
  74   // NB Have to close these suckers. . .
  75   // filebuf_type* close()
  76   fb_01.close();
  77   fb_02.close();
  78   fb_03.close();
  79   VERIFY( !fb_01.is_open() );
  80   VERIFY( !fb_02.is_open() );
  81   VERIFY( !fb_03.is_open() );
  82 }
  83
  84 int main()
  85 {
  86   test03();
  87   test05();
  88   return 0;
  89 }