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/* $Id$ */
/*
* This file is part of OpenTTD.
* OpenTTD 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, version 2.
* OpenTTD 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 OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file array.hpp Array without an explicit maximum size. */
#ifndef ARRAY_HPP
#define ARRAY_HPP
#include "fixedsizearray.hpp"
#include "str.hpp"
/** Flexible array with size limit. Implemented as fixed size
* array of fixed size arrays */
template <class Titem_, int Tblock_size_ = 1024, int Tnum_blocks_ = Tblock_size_>
class CArrayT {
public:
typedef Titem_ Titem; ///< Titem is now visible from outside
typedef CFixedSizeArrayT<Titem_, Tblock_size_> CSubArray; ///< inner array
typedef CFixedSizeArrayT<CSubArray, Tnum_blocks_> CSuperArray; ///< outer array
protected:
CSuperArray m_a; ///< array of arrays of items
public:
static const int Tblock_size = Tblock_size_; ///< block size is now visible from outside
static const int Tnum_blocks = Tnum_blocks_; ///< number of blocks is now visible from outside
static const int Tcapacity = Tblock_size * Tnum_blocks; ///< total max number of items
/** implicit constructor */
FORCEINLINE CArrayT() { }
/** Clear (destroy) all items */
FORCEINLINE void Clear() {m_a.Clear();}
/** Return actual number of items */
FORCEINLINE int Size() const
{
int super_size = m_a.Size();
if (super_size == 0) return 0;
int sub_size = m_a[super_size - 1].Size();
return (super_size - 1) * Tblock_size + sub_size;
}
/** return true if array is empty */
FORCEINLINE bool IsEmpty() { return m_a.IsEmpty(); }
/** return true if array is full */
FORCEINLINE bool IsFull() { return m_a.IsFull() && m_a[Tnum_blocks - 1].IsFull(); }
/** return first sub-array with free space for new item */
FORCEINLINE CSubArray& FirstFreeSubArray()
{
int super_size = m_a.Size();
if (super_size > 0) {
CSubArray& sa = m_a[super_size - 1];
if (!sa.IsFull()) return sa;
}
return m_a.Add();
}
/** allocate but not construct new item */
FORCEINLINE Titem_& AddNC() { return FirstFreeSubArray().AddNC(); }
/** allocate and construct new item */
FORCEINLINE Titem_& Add() { return FirstFreeSubArray().Add(); }
/** indexed access (non-const) */
FORCEINLINE Titem& operator [] (int idx)
{
CSubArray& sa = m_a[idx / Tblock_size];
Titem& item = sa [idx % Tblock_size];
return item;
}
/** indexed access (const) */
FORCEINLINE const Titem& operator [] (int idx) const
{
const CSubArray& sa = m_a[idx / Tblock_size];
const Titem& item = sa [idx % Tblock_size];
return item;
}
template <typename D> void Dump(D &dmp) const
{
dmp.WriteLine("capacity = %d", Tcapacity);
int num_items = Size();
dmp.WriteLine("num_items = %d", num_items);
CStrA name;
for (int i = 0; i < num_items; i++) {
const Titem& item = (*this)[i];
name.Format("item[%d]", i);
dmp.WriteStructT(name.Data(), &item);
}
}
};
#endif /* ARRAY_HPP */
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