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/* $Id$ */

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/** @file array.hpp */

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#ifndef  ARRAY_HPP

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#define  ARRAY_HPP

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#include "fixedsizearray.hpp"

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/** Flexible array with size limit. Implemented as fixed size

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 *  array of fixed size arrays */

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template <class Titem_, int Tblock_size_ = 1024, int Tnum_blocks_ = Tblock_size_>

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class CArrayT {

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public:

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	typedef Titem_ Titem; ///< Titem is now visible from outside

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	typedef CFixedSizeArrayT<Titem_, Tblock_size_> CSubArray; ///< inner array

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	typedef CFixedSizeArrayT<CSubArray, Tnum_blocks_> CSuperArray; ///< outer array

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protected:

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	CSuperArray     m_a; ///< array of arrays of items

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public:

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	static const int Tblock_size = Tblock_size_; ///< block size is now visible from outside

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	static const int Tnum_blocks = Tnum_blocks_; ///< number of blocks is now visible from outside

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	static const int Tcapacity   = Tblock_size * Tnum_blocks; ///< total max number of items

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	/** implicit constructor */

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	FORCEINLINE CArrayT() { }

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	/** Clear (destroy) all items */

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	FORCEINLINE void Clear() {m_a.Clear();}

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	/** Return actual number of items */

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	FORCEINLINE int Size() const

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	{

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		int super_size = m_a.Size();

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		if (super_size == 0) return 0;

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		int sub_size = m_a[super_size - 1].Size();

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		return (super_size - 1) * Tblock_size + sub_size;

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	}

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	/** return true if array is empty */

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	FORCEINLINE bool IsEmpty() { return m_a.IsEmpty(); }

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	/** return true if array is full */

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	FORCEINLINE bool IsFull() { return m_a.IsFull() && m_a[Tnum_blocks - 1].IsFull(); }

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	/** return first sub-array with free space for new item */

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	FORCEINLINE CSubArray& FirstFreeSubArray()

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	{

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		int super_size = m_a.Size();

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		if (super_size > 0) {

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			CSubArray& sa = m_a[super_size - 1];

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			if (!sa.IsFull()) return sa;

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		}

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		return m_a.Add();

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	}

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	/** allocate but not construct new item */

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	FORCEINLINE Titem_& AddNC() { return FirstFreeSubArray().AddNC(); }

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	/** allocate and construct new item */

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	FORCEINLINE Titem_& Add()   { return FirstFreeSubArray().Add(); }

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	/** indexed access (non-const) */

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	FORCEINLINE Titem& operator [] (int idx)

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	{

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		CSubArray& sa = m_a[idx / Tblock_size];

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		Titem& item   = sa [idx % Tblock_size];

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		return item;

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	}

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	/** indexed access (const) */

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	FORCEINLINE const Titem& operator [] (int idx) const

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	{

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		const CSubArray& sa = m_a[idx / Tblock_size];

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		const Titem& item   = sa [idx % Tblock_size];

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		return item;

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	}

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	template <typename D> void Dump(D &dmp) const

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	{

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		dmp.WriteLine("capacity = %d", Tcapacity);

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		int num_items = Size();

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		dmp.WriteLine("num_items = %d", num_items);

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		CStrA name;

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		for (int i = 0; i < num_items; i++) {

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			const Titem& item = (*this)[i];

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			name.Format("item[%d]", i);

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			dmp.WriteStructT(name.Data(), &item);

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		}

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	}

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};

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#endif /* ARRAY_HPP */