libstdc++-v3/testsuite/27_io/filebuf_members.cc

   1 // Copyright (C) 2000 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 2, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING.  If not, write to the Free
  16 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  17 // USA.
  18
  19 // 27.8.1.3 filebuf member functions
  20 // @require@ %-*.tst %-*.txt
  21 // @diff@ %-*.tst %-*.txt
  22
  23 // various tests for filebuf::open() and filebuf::close() including
  24 // the non-portable functionality in the libstdc++-v3 IO library
  25
  26 #include <fstream>
  27 #include <cassert>
  28 #include <unistd.h>
  29 #include <fcntl.h>
  30 #include <debug_assert.h>
  31
  32 // verify that std::filebuf doesn't close files that it didn't open
  33 // when using the following std::filebuf ctor:
  34 //
  35 //      std::filebuf(int __fd,
  36 //                   const char* __unused,
  37 //                   ios_base::openmode __mode);
  38 //
  39 // thanks to "George T. Talbot" <george@moberg.com> for uncovering
  40 // this bug/situation.
  41
  42 const char name_01[] = "filebuf_members-1.tst";
  43 const char name_02[] = "filebuf_members-1.txt";
  44
  45 int
  46 test_01()
  47 {
  48   bool test = true;
  49   int close_num;
  50
  51   // read (ext)
  52   FILE* f2 = fopen(name_01, "r");
  53   VERIFY( f2 != NULL );
  54   {
  55     std::filebuf fb(f2, std::ios_base::in, 512);
  56   }
  57   close_num = fclose(f2);
  58   VERIFY( close_num == 0 );
  59
  60
  61   // read (standard)
  62   FILE* f = fopen(name_01, "r");
  63   VERIFY( f != NULL );
  64   {
  65     std::ifstream ifstream1(name_01);
  66     VERIFY( ifstream1.is_open() );
  67     std::ios_base::iostate st01 = ifstream1.rdstate();
  68     VERIFY( st01 == std::ios_base::goodbit );
  69   }
  70   close_num = fclose(f);
  71   VERIFY( close_num == 0 );
  72
  73
  74 #ifdef DEBUG_ASSERT
  75   assert(test);
  76 #endif
  77
  78   return test;
  79 }
  80
  81
  82 int
  83 main()
  84 {
  85   test_01();
  86   return 0;
  87 }