/*

 * Copyright (C) 2012 David Anderson

 *

 * This file is part of JITCraft.

 *

 * JITCraft 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, either version 3 of the License, or (at your option)

 * any later version.

 * 

 * Foobar 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

 * JITCraft. If not, see http://www.gnu.org/licenses/.

 */

#include "Array.h"

#include "Heap.h"

#include "Zone.h"

#include "Heap-inl.h"

using namespace jc;

ArrayMap *

ArrayMap::New(Zone *zone, Type *type, ArrayMap *contained)

{

    // :TODO: use Local

    Map *obj = zone->allocateMap(MapKind_Array, sizeof(ArrayMap), MapKind_MetaArray);

    if (!obj)

        return NULL;

    ArrayMap *map = ArrayMap::cast(obj);

    map->init(type, contained);

    return map;

}

static inline size_t

SizeFor(Type *type, unsigned elements)

{

    if (type->levels() > 1)

        return sizeof(Array) + elements * sizeof(jc::Object *);

    if (type->contained()->isInt())

        return sizeof(Array) + elements * sizeof(int);

    assert(type->contained()->isFloat());

    return sizeof(Array) + elements * sizeof(float);

}

void

Array::init(uint32 nelements)

{

    WRITE_FIELD(nelements, nelements);

    WRITE_FIELD(elements, VoidPtr(this + 1));

}

Array *

Array::New(Zone *zone, ArrayMap *map, uint32 elements, Heap::Tenure tenure)

{

    // :TODO: handles

    size_t bytes = SizeFor(map->type(), elements);

    Object *obj = zone->allocate(map, bytes, tenure);

    if (!obj)

        return NULL;

    Array *array = Array::cast(obj);

    array->init(elements);

    return Array::cast(obj);

}