sample_size_policy.hpp

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// -*- C++ -*-

// Copyright (C) 2005-2019 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.

// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.

// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
// <http://www.gnu.org/licenses/>.

// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.

// Permission to use, copy, modify, sell, and distribute this software
// is hereby granted without fee, provided that the above copyright
// notice appears in all copies, and that both that copyright notice
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/**
 * @file sample_size_policy.hpp
 * Contains a sample size resize-policy.
 */

#ifndef PB_DS_SAMPLE_SIZE_POLICY_HPP
#define PB_DS_SAMPLE_SIZE_POLICY_HPP

namespace __gnu_pbds
{
  /// A sample size policy.
  class sample_size_policy
  {
  public:
    /// Size type.
    typedef std::size_t size_type;

    /// Default constructor.
    sample_size_policy();

    /// Copy constructor.
    sample_range_hashing(const sample_size_policy&);

    /// Swaps content.
    inline void
    swap(sample_size_policy& other);

  protected:
    /// Given a __size size, returns a __size that is larger.
    inline size_type
    get_nearest_larger_size(size_type size) const;

    /// Given a __size size, returns a __size that is smaller.
    inline size_type
    get_nearest_smaller_size(size_type size) const;
  };
}
#endif