libstdc++-v3/testsuite/27_io/basic_filebuf/close/char/2.cc

   1 // Copyright (C) 2001-2023 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 3, 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 COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // { dg-require-fileio "" }
  19
  20 // 27.8.1.3 filebuf member functions
  21 // @require@ %-*.tst %-*.txt
  22 // @diff@ %-*.tst %-*.txt
  23
  24 // various tests for filebuf::open() and filebuf::close() including
  25 // the non-portable functionality in the libstdc++-v3 IO library
  26
  27 #include <fstream>
  28 #include <ext/stdio_filebuf.h>
  29 #include <testsuite_hooks.h>
  30
  31 // Verify that std::filebuf doesn't close files that it didn't open
  32 // when using the following std::filebuf ctor:
  33 //
  34 //      std::filebuf(__c_file_type*  __f,
  35 //                   ios_base::openmode __mode,
  36 //                   int_type  __s);
  37 //
  38 // Thanks to "George T. Talbot" <george@moberg.com> for uncovering
  39 // this bug/situation.
  40
  41 const char name_01[] = "filebuf_virtuals-1.txt"; // file with data in it
  42 const char name_02[] = "filebuf_virtuals-2.txt"; // empty file, need to create
  43
  44 void test_02()
  45 {
  46   int close_num = 0;
  47
  48   // read (ext)
  49   FILE* f2 = fopen(name_01, "r");
  50   VERIFY( f2 );
  51   if (f2)
  52   {
  53     __gnu_cxx::stdio_filebuf<char> fb(f2, std::ios_base::in, 512);
  54     close_num = fclose(f2);
  55   }
  56   VERIFY( close_num == 0 );
  57
  58   // read (standard)
  59   FILE* f = fopen(name_01, "r");
  60   VERIFY( f );
  61   if (f)
  62   {
  63     std::ifstream ifstream1(name_01);
  64     VERIFY( ifstream1.is_open() );
  65     std::ios_base::iostate st01 = ifstream1.rdstate();
  66     VERIFY( st01 == std::ios_base::goodbit );
  67     close_num = fclose(f);
  68   }
  69   VERIFY( close_num == 0 );
  70 }
  71
  72 int
  73 main()
  74 {
  75   test_02();
  76   return 0;
  77 }
  78
  79