/*
 * 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);
}