4jcraft/Minecraft.World/Util/ArrayWithLength.h

#pragma once

#include <assert.h>

// Note - this is meant to be a really simple wrapper round a pointer just to be
// able to add a length value to arrays.
//  As such, it shouldn't delete its data in a destructor as shallow copies will
//  be made of this and we don't want to free the data just because one of those
//  has gone out of scope
template <class T>
class arrayWithLength {
public:
    T* data;
    unsigned int length;
    arrayWithLength() {
        data = NULL;
        length = 0;
    }
    arrayWithLength(unsigned int elements, bool bClearArray = true) {
        assert(elements != 0);
        data = new T[elements];
        if (bClearArray) {
            memset((void*)data, 0, sizeof(T) * elements);
        }
        this->length = elements;
    }

    // 4J Stu Added this ctor so I static init arrays in the Item derivation
    // tree
    arrayWithLength(T data[], unsigned int elements) {
        this->data = data;
        this->length = elements;
    }

    //~arrayWithLength() { delete[] data; }

    void resize(unsigned int elements) {
        assert(elements > length);
        T* temp = new T[elements];
        memset((void*)temp, 0, sizeof(T) * elements);

        if (data != NULL) {
            std::copy(data, data + length, temp);

            delete[] data;
        }
        data = temp;
        length = elements;
    }

    T& operator[](unsigned int i) { return data[i]; }
    T operator[](unsigned int i) const { return data[i]; }
};

// TODO 4J Stu - This looks right, but is it?
template <class T>
class array2DWithLength {
    typedef arrayWithLength<T>* _parrayWithLength;

public:
    _parrayWithLength* data;
    unsigned int length;
    array2DWithLength() {
        data = NULL;
        length = 0;
    }
    array2DWithLength(unsigned int dimA, unsigned int dimB) {
        data = new _parrayWithLength[dimA];
        this->length = dimA;

        for (unsigned int i = 0; i < length; i++)
            data[i] = new arrayWithLength<T>(dimB);
    }

    _parrayWithLength& operator[](unsigned int i) { return data[i]; }
    _parrayWithLength operator[](unsigned int i) const { return data[i]; }
};

class Biome;
class LevelChunk;
class Node;
class Item;
class Tile;
class Stat;
class MobCategory;
class File;
class Vertex;
class _Polygon;  // Renaming as have conflict with Windows Polygon fn
class ServerLevel;
class MultiPlayerLevel;
class Level;
class LevelRenderer;
class WeighedRandomItem;
class WeighedTreasure;
class Layer;
// class Cube;
class ModelPart;
class Enchantment;
class ClipChunk;

typedef arrayWithLength<double> doubleArray;
typedef array2DWithLength<double> coords2DArray;
typedef arrayWithLength<uint8_t> byteArray;
typedef arrayWithLength<char> charArray;
typedef arrayWithLength<short> shortArray;
typedef arrayWithLength<int> intArray;
typedef arrayWithLength<float> floatArray;
typedef arrayWithLength<Biome*> BiomeArray;
typedef arrayWithLength<LevelChunk*> LevelChunkArray;
typedef array2DWithLength<LevelChunk*> LevelChunk2DArray;
typedef arrayWithLength<Node*> NodeArray;
typedef arrayWithLength<Item*> ItemArray;
typedef arrayWithLength<Tile*> TileArray;
typedef arrayWithLength<Stat*> StatArray;
typedef arrayWithLength<MobCategory*> MobCategoryArray;
typedef arrayWithLength<File*> FileArray;
typedef arrayWithLength<Vertex*> VertexArray;
typedef arrayWithLength<_Polygon*> PolygonArray;
typedef arrayWithLength<ServerLevel*> ServerLevelArray;
typedef arrayWithLength<MultiPlayerLevel*> MultiPlayerLevelArray;
typedef arrayWithLength<Level*> LevelArray;
typedef arrayWithLength<LevelRenderer*> LevelRendererArray;
typedef arrayWithLength<WeighedRandomItem*> WeighedRandomItemArray;
typedef arrayWithLength<WeighedTreasure*> WeighedTreasureArray;
typedef arrayWithLength<std::shared_ptr<Layer> > LayerArray;
// typedef arrayWithLength<Cube *> CubeArray;
typedef arrayWithLength<ModelPart*> ModelPartArray;
typedef arrayWithLength<Enchantment*> EnchantmentArray;
typedef arrayWithLength<ClipChunk> ClipChunkArray;

#include "../Items/ItemInstance.h"
typedef arrayWithLength<std::shared_ptr<ItemInstance> > ItemInstanceArray;