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// { dg-require-fileio "" }
 
// Copyright (C) 2010, 2011 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 3, 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 COPYING3.  If not see
// <http://www.gnu.org/licenses/>.
 
// 27.8.1.4 Overridden virtual functions
 
#include <fstream>
#include <cwchar>
#include <cstring>
#include <testsuite_hooks.h>
 
void test01()
{
  using namespace std;
  bool test __attribute__((unused)) = true;
 
  typedef wfilebuf::pos_type pos_type;
  const char name[] = "tmp_seekoff-4.tst";
 
  const size_t size = 12;
  wchar_t buf[size];
  streamsize n;
 
  wfilebuf fb;
  fb.open(name, ios_base::in | ios_base::out | ios_base::trunc);
 
  n = fb.sputn(L"abcd", 4);
  VERIFY( n == 4 );
 
  fb.pubseekoff(0, ios_base::beg);
  n = fb.sgetn(buf, 3);
  VERIFY( n == 3 );
  VERIFY( !wmemcmp(buf, L"abc", 3) );
 
  // Check read => write without pubseekoff(0, ios_base::cur)
 
  n = fb.sputn(L"ef", 2);
  VERIFY( n == 2 );
 
  fb.pubseekoff(0, ios_base::beg);
 
  n = fb.sgetn(buf, size);
  VERIFY( n == 5 );
  VERIFY( !wmemcmp(buf, L"abcef", 5) );
 
  fb.pubseekoff(0, ios_base::beg);
  n = fb.sputn(L"gh", 2);
  VERIFY( n == 2 );
 
  // Check write => read without pubseekoff(0, ios_base::cur)
 
  n = fb.sgetn( buf, 3 );
  VERIFY( !memcmp(buf, L"cef", 3) );
 
  n = fb.sputn(L"ijkl", 4);
  VERIFY( n == 4 );
 
  fb.pubseekoff(0, ios_base::beg);
  n = fb.sgetn(buf, 2);
  VERIFY( n == 2 );
  VERIFY( !wmemcmp(buf, L"gh", 2) );
 
  fb.pubseekoff(0, ios_base::end);
  n = fb.sputn(L"mno", 3);
  VERIFY( n == 3 );
 
  fb.pubseekoff(0, ios_base::beg);
  n = fb.sgetn(buf, size);
  VERIFY( n == 12 );
  VERIFY( !wmemcmp(buf, L"ghcefijklmno", 12) );
 
  fb.close();
}
 
int main()
{
  test01();
  return 0;
}