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
  21 // various tests for filebuf::open() and filebuf::close() including
  22 // the non-portable functionality in the libstdc++-v3 IO library
  23
  24 #include <fstream>
  25 #include <cassert>
  26 #include <unistd.h>
  27 #include <fcntl.h>
  28
  29
  30 // verify that std::filebuf doesn't close files that it didn't open
  31 // when using the following std::filebuf ctor:
  32 //
  33 //      std::filebuf(int __fd,
  34 //                   const char* __unused,
  35 //                   ios_base::openmode __mode);
  36 //
  37 // thanks to "George T. Talbot" <george@moberg.com> for uncovering
  38 // this bug/situation.
  39
  40 const char name_01[] = "testsuite/filebuf_members-1.tst";
  41 const char name_02[] = "testsuite/filebuf_members-1.txt";
  42
  43 int
  44 test_01()
  45 {
  46   bool test = true;
  47   int close_num;
  48
  49   // read (ext)
  50   int fd = open(name_01, O_RDONLY);
  51   test &= fd >= 0;
  52
  53   {
  54     std::filebuf fb(fd, "double_read", std::ios_base::in);
  55   }
  56
  57   close_num = close(fd);
  58   test &= close_num == 0;
  59
  60
  61   // read (standard)
  62   FILE* f = fopen(name_01, "r");
  63   test &= f != NULL;
  64
  65   {
  66     std::ifstream ifstream1(name_01);
  67     test &= ifstream1.is_open();
  68     std::ios_base::iostate st01 = ifstream1.rdstate();
  69     test &= st01 == std::ios_base::goodbit;
  70   }
  71
  72   close_num = fclose(f);
  73   test &= close_num == 0;
  74
  75
  76 #ifdef DEBUG_ASSERT
  77   assert(test);
  78 #endif
  79
  80   return test;
  81 }
  82
  83
  84 int
  85 main()
  86 {
  87   test_01();
  88   return 0;
  89 }
  90
  91
  92
  93