mirror of https://github.com/OpenTTD/OpenTTD.git
72 lines
2.3 KiB
C++
72 lines
2.3 KiB
C++
/* $Id$ */
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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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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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};
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#endif /* ARRAY_HPP */
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