/*

  * 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/.

  */

 #ifndef _include_jc_unsafe_array_

 #define _include_jc_unsafe_array_

 #include <assert.h>

 namespace jc {

 class UnsafeArray

 {

   public:

     unsigned length() {

         return *(reinterpret_cast<unsigned *>(this) - 1);

     }

     unsigned *uint32Vector() {

         return reinterpret_cast<unsigned *>(this);

     }

     int *int32Vector() {

         return reinterpret_cast<int *>(this);

     }

     int readInt32(size_t index) {

         assert(index < length());

         return int32Vector()[index];

     }

     void writeInt32(size_t index, int value) {

         assert(index < length());

         int32Vector()[index] = value;

     }

     UnsafeArray *indirect(size_t index) {

         assert(index < length());

         unsigned *address = uint32Vector() + index;

         return reinterpret_cast<UnsafeArray *>(reinterpret_cast<char *>(address) + *address);

     }

     void *allocationBase() {

         return reinterpret_cast<unsigned *>(this) - 1;

     }

 };

 }

 #endif // _include_jc_unsafe_array_