/* vim: set ts=4 sw=4 tw=99 et:

  *

  * Copyright (C) 2012 David Anderson

  *

  * This file is part of SourcePawn.

  *

  * SourcePawn 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.

  * 

  * SourcePawn 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

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

  */

 #include <string.h>

 #include "Array.h"

 #include "Heap.h"

 #include "Zone.h"

 #include "Structures.h"

 #include "Heap-inl.h"

 using namespace ke;

 ArrayMap *

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

 {

     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;

     return map;

 }

 static inline size_t

 SizeFor(Type *type, unsigned elements)

 {

     if (type->contained()->isTraceable())

         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;

     if (map->type()->contained()->isArray()) {

         Local<ArrayMap> childMap(zone, ArrayMap::cast(map->type()->contained()->newMap()));

         Local<Array> child(zone);

         for (unsigned i = 0; i < elements; i++) {

             child = Array::New(zone, childMap, map->type()->contained()->elements(), tenure);

             if (!child)

                 return NULL;

             array->writeObject(zone, i, child);

         }

     } else if (map->type()->contained()->isStruct()) {

         Local<StructMap> childMap(zone, StructMap::cast(map->type()->contained()->newMap()));

         Local<Struct> child(zone);

         for (unsigned i = 0; i < elements; i++) {

             child = Struct::New(zone, childMap, tenure);

             if (!child)

                 return NULL;

             array->writeObject(zone, i, child);

         }

     } else {

         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;

 }