asherkin@263: /* vim: set ts=4 sw=4 tw=99 et:
asherkin@263:  *
asherkin@263:  * Copyright (C) 2012 David Anderson
asherkin@263:  *
asherkin@263:  * This file is part of SourcePawn.
asherkin@263:  *
asherkin@263:  * SourcePawn is free software: you can redistribute it and/or modify it under
asherkin@263:  * the terms of the GNU General Public License as published by the Free
asherkin@263:  * Software Foundation, either version 3 of the License, or (at your option)
asherkin@263:  * any later version.
asherkin@263:  * 
asherkin@263:  * SourcePawn is distributed in the hope that it will be useful, but WITHOUT ANY
asherkin@263:  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
asherkin@263:  * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
asherkin@263:  *
asherkin@263:  * You should have received a copy of the GNU General Public License along with
asherkin@263:  * SourcePawn. If not, see http://www.gnu.org/licenses/.
asherkin@263:  */
asherkin@263: #ifndef _include_jitcraft_fixedarray_h_
asherkin@263: #define _include_jitcraft_fixedarray_h_
asherkin@263: 
asherkin@263: #include "Heap.h"
asherkin@263: 
asherkin@263: namespace ke {
asherkin@263: 
asherkin@263: // A fixed-length array that contains Object * slots.
asherkin@263: class FixedArray : public Object
asherkin@263: {
asherkin@263:     uint32 length_;
asherkin@263: 
asherkin@263:   private:
asherkin@263:     Object **vec() {
asherkin@263:         return reinterpret_cast<Object **>(this + 1);
asherkin@263:     }
asherkin@263: 
asherkin@263:   public:
asherkin@263:     static FixedArray *New(Zone *zone, unsigned length, Heap::Tenure tenure);
asherkin@263: 
asherkin@263:     unsigned length() {
asherkin@263:         return length_;
asherkin@263:     }
asherkin@263:     Object *at(size_t i) {
asherkin@263:         assert(i < length());
asherkin@263:         return vec()[i];
asherkin@263:     }
asherkin@263:     void set(Zone *zone, size_t i, Object *obj) {
asherkin@263:         assert(i < length());
asherkin@263:         write(zone, &vec()[i], obj);
asherkin@263:     }
asherkin@263:     size_t objSize() {
asherkin@263:         return SizeFor(length());
asherkin@263:     }
asherkin@263: 
asherkin@263:     static inline size_t SizeFor(unsigned length) {
asherkin@263:         return sizeof(FixedArray) + sizeof(Object *) * length;
asherkin@263:     }
asherkin@263: 
asherkin@263:     static inline FixedArray *cast(Object *obj) {
asherkin@263:         assert(!obj || obj->is(MapKind_FixedArray));
asherkin@263:         return reinterpret_cast<FixedArray *>(obj);
asherkin@263:     }
asherkin@263: };
asherkin@263: 
asherkin@263: // A fixed-length array containing raw bytes.
asherkin@263: class ByteArray : public Object
asherkin@263: {
asherkin@263:     uint32 length_;
asherkin@263: 
asherkin@263:   public:
asherkin@263:     static ByteArray *New(Zone *zone, unsigned length, Heap::Tenure tenure = Heap::Tenure_Default);
asherkin@263:     static ByteArray *New(Zone *zone, Handle<Map> map, unsigned length, Heap::Tenure tenure = Heap::Tenure_Default);
asherkin@263: 
asherkin@263:     unsigned length() {
asherkin@263:         return length_;
asherkin@263:     }
asherkin@263:     Address raw() {
asherkin@263:         return Address(this) + offsetToElements();
asherkin@263:     }
asherkin@263:     size_t objSize() {
asherkin@263:         return SizeFor(length());
asherkin@263:     }
asherkin@263: 
asherkin@263:     static inline size_t offsetToElements() {
asherkin@263:         return sizeof(ByteArray);
asherkin@263:     }
asherkin@263: 
asherkin@263:     static inline size_t SizeFor(unsigned length) {
asherkin@263:         return sizeof(ByteArray) + sizeof(uint8) * length;
asherkin@263:     }
asherkin@263: 
asherkin@263:     static inline ByteArray *cast(Object *obj) {
asherkin@263:         assert(!obj || obj->is(MapKind_ByteArray));
asherkin@263:         return reinterpret_cast<ByteArray *>(obj);
asherkin@263:     }
asherkin@263: };
asherkin@263: 
asherkin@263: }
asherkin@263: 
asherkin@263: #endif // _include_jitcraft_fixedarray_h_