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// 1999-09-20 bkoz

// Copyright (C) 1999, 2001, 2003, 2009 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/>.

// 27.4.3 template class fpos

#include <cwchar> // for mbstate_t

#include <ios>

#include <testsuite_hooks.h>

// 27.4.3.2 fpos requirements/invariants

void test02()

{

  bool test __attribute__((unused)) = true;

  typedef std::mbstate_t state_type;

  std::streamoff off01;

  std::streamoff off02 = 997;

  int i02 = 999;

  // p(i), p = i

  std::streampos pos01(i02);

  std::streampos pos02 = i02;

  VERIFY( pos01 == pos02 );

  // p(o), p = o 

  // NB: P(o) is only required.

  std::streampos pos03(off02);

  std::streampos pos04 = off02;

  VERIFY( pos03 == pos04 );

  // O(p)

  std::streamoff off03(pos04);

  VERIFY( off03 == off02 );

  // p == q, p!= q

  VERIFY( pos01 == pos02 );

  VERIFY( pos02 != pos03 );

  // q = p + o

  // p += o

  pos03 = pos03 + off02;

  pos04 += off02;

  VERIFY( pos03 == pos04 );

  std::streampos pos05 = pos03;

  std::streampos pos06 = pos03 + off02;

  VERIFY ( pos05 == pos03 );

  // q = p - o

  // p -= o

  pos03 = pos03 - off02;

  pos04 -= off02;

  VERIFY( pos03 == pos04 );

  std::streampos pos07 = pos03;

  std::streampos pos08 = pos03 - off02;

  VERIFY ( pos07 == pos03 );

  // o = p - q

  VERIFY( 0 == pos03 - pos04 );

  // streamsize -> streamoff

  // streamoff -> streamsize 

  off01 = off02;

  std::streamsize size01(off02);

  std::streamoff off04(size01);

  VERIFY( off01 == off04 );

}

int main()

{

  test02();

  return 0;

}