3-in.cc

Mac OS X 10.4.9 for x86 Source Code gcc 实现源代码

// 2001-05-21 Benjamin Kosnik  <[e-mail]>

// Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 2, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING.  If not, write to the Free
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.

// 27.7.1.3 Overridden virtual functions

#include <fstream>
#include <testsuite_hooks.h>

void test02(std::filebuf& in, bool pass)
{
  bool test __attribute__((unused)) = true;
  using namespace std;
  typedef streambuf::pos_type pos_type;
  typedef streambuf::off_type off_type;
  pos_type bad = pos_type(off_type(-1));
  pos_type p = 0;

  // seekoff
  p = in.pubseekoff(0, ios_base::beg, ios_base::in);
  VERIFY( pass == (p != bad) );

  p = in.pubseekoff(0, ios_base::beg, ios_base::out);
  VERIFY( pass == (p != bad) );  // See libstdc++/12232

  p = in.pubseekoff(0, ios_base::beg); 
  VERIFY( pass == (p != bad) );
}

const char name_01[] = "filebuf_virtuals-1.tst"; // file with data in it
const char name_03[] = "filebuf_members-1.tst"; // empty file

int main() 
{
  using namespace std;

  filebuf in1;
  in1.open(name_01, ios_base::in);
  filebuf in2;
  filebuf in3;
  in3.open(name_03, ios_base::in);
  test02(in1, true);
  test02(in2, false);
  test02(in3, true);
  return 0;
}