urho3d/Source/Urho3D/Container/VectorBase.h

//
// Copyright (c) 2008-2020 the Urho3D project.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// THE SOFTWARE.
//

#pragma once

#ifdef URHO3D_IS_BUILDING
#include "Urho3D.h"
#else
#include <Urho3D/Urho3D.h>
#endif

#include "../Base/Iter.h"
#include "../Container/Swap.h"

namespace Urho3D
{

/// %Vector base class.
/** Note that to prevent extra memory use due to vtable pointer, %VectorBase intentionally does not declare a virtual destructor
    and therefore %VectorBase pointers should never be used.
  */
class URHO3D_API VectorBase
{
public:
    /// Construct.
    VectorBase() noexcept :
        size_(0),
        capacity_(0),
        buffer_(nullptr)
    {
    }

    /// Swap with another vector.
    void Swap(VectorBase& rhs)
    {
        Urho3D::Swap(size_, rhs.size_);
        Urho3D::Swap(capacity_, rhs.capacity_);
        Urho3D::Swap(buffer_, rhs.buffer_);
    }

protected:
    static unsigned char* AllocateBuffer(unsigned size);

    /// Size of vector.
    unsigned size_;
    /// Buffer capacity.
    unsigned capacity_;
    /// Buffer.
    unsigned char* buffer_;
};

}