/*

 * 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 <string.h>

#include "Array.h"

#include "Heap.h"

#include "Zone.h"

#include "Heap-inl.h"

using namespace ke;

ArrayMap *

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

{

    Local<Map> obj(zone, zone->allocateMap(MapKind_Array, sizeof(ArrayMap), MapKind_MetaArray));

    if (!obj)

        return NULL;

    Local<ArrayMap> map(zone, ArrayMap::cast(obj));

    map->type_ = type;

    map->contained_ = contained;

    return map;

}

static inline size_t

SizeFor(Type *type, unsigned elements)

{

    if (type->levels() > 1)

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

    if (type->contained()->isInt32())

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

    if (type->contained()->primitive() == PrimitiveType_Char)

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

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

    return elements * sizeof(float);

}

Array *

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

{

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

    size_t bytes = sizeof(Array) + elementBytes;

    Local<Array> array(zone, Array::cast(zone->allocate(map, bytes, tenure)));

    if (!array)

        return NULL;

    array->nelements_ = elements;

    array->elements_ = (Array *)array + 1;

    memset(array->elements_, 0, elementBytes);

    return array;

}

Array *

Array::NewExternal(Zone *zone, Handle<ArrayMap> map, uint32 nelements, void *buffer,

                   Heap::Tenure tenure)

{

    Local<Array> array(zone, Array::cast(zone->allocate(map, sizeof(Array), tenure)));

    if (!array)

        return NULL;

    array->nelements_ = nelements;

    array->elements_ = buffer;

    return array;

}