libstdc++-v3/testsuite/27_io/basic_filebuf/open/wchar_t/1.cc

   1 // Copyright (C) 2018-2019 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-do run { target *-*-mingw* } }
  19 // { dg-require-fileio "" }
  20
  21 #include <fstream>
  22 #include <testsuite_hooks.h>
  23
  24 const wchar_t name_01[] = L"filebuf_members-1.tst";
  25 const wchar_t name_02[] = L"filebuf_members-1.txt";
  26
  27 // Test member functions.
  28 void test01()
  29 {
  30   const wchar_t* name_03 = L"filebuf_members-w3"; // empty file, need to create
  31
  32   std::filebuf fb_01; // in
  33   std::filebuf fb_02; // out
  34   std::filebuf fb_03; // in | out
  35
  36   // bool is_open()
  37   VERIFY( !fb_01.is_open() );
  38   VERIFY( !fb_02.is_open() );
  39   VERIFY( !fb_03.is_open() );
  40
  41   // filebuf_type* open(const wchar_t* __s, ios_base::openmode __mode)
  42   fb_01.open(name_01, std::ios_base::in | std::ios_base::ate);
  43   VERIFY( fb_01.is_open() );
  44
  45   // Try to open two different files without closing the first:
  46   // Should keep the old file attached, and disregard attempt to overthrow.
  47   std::filebuf* f = fb_02.open(name_02, std::ios_base::in | std::ios_base::out
  48                                | std::ios_base::trunc);
  49   VERIFY( f );
  50   VERIFY( fb_02.is_open() );
  51
  52   f = fb_02.open(name_03, std::ios_base::in | std::ios_base::out);
  53   VERIFY( !f );
  54   VERIFY( fb_02.is_open() );
  55
  56   fb_03.open(name_03, std::ios_base::out | std::ios_base::trunc);
  57   VERIFY( fb_03.is_open() );
  58 }
  59
  60 void test02()
  61 {
  62   std::wfilebuf fb;
  63   fb.open(name_01, std::wios::in);
  64   VERIFY( fb.is_open() );
  65 }
  66
  67 int
  68 main()
  69 {
  70   test01();
  71   test02();
  72 }