Subversion Repositories openrisc_me

// Copyright (C) 2006, 2007, 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/>.

// 25.3.2 [lib.alg.nth.element]

// { dg-options "-DMAX_SIZE=256" { target simulator } }

#ifndef MAX_SIZE

#define MAX_SIZE (1 << 10)

#endif

#include <vector>

#include <algorithm>

#include <testsuite_hooks.h>

void

test_set(std::vector<unsigned>& v, unsigned size)

{

  v.clear();

  for (unsigned i = 0; i < size; i += 4)

    {

      v.push_back(i / 2);

      v.push_back((size - 2) - (i / 2));

    }

  for (unsigned i = 1; i < size; i += 2)

    v.push_back(i);

}

void

do_test01(unsigned size)

{

  bool test __attribute__((unused)) = true;

  std::vector<unsigned> v, s;

  for (unsigned j = 0; j < size; ++j)

    {

      test_set(v, size);

      s = v;

      std::sort(s.begin(), s.end());

      std::nth_element(v.begin(), v.begin() + j, v.end());

      VERIFY( v[j] == s[j] );

      for (unsigned i = 0; i < j; ++i)

        VERIFY( !(v[j] < v[i]) );

      for (unsigned i = j; i < v.size(); ++i)

        VERIFY( !(v[i] < v[j]) );

    }

}

void

test01()

{

  for (unsigned size = 4; size <= MAX_SIZE; size <<= 1)

    do_test01(size);

}

int main()

{

  test01();

  return 0;

}