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/* ScummVM - Scumm Interpreter
 * Copyright (C) 2006 The ScummVM project
 *
 * cinE Engine is (C) 2004-2005 by CinE Team
 *
 * This program 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 2
 * of the License, or (at your option) any later version.

 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $URL$
 * $Id$
 *
 */

#include "cruise/cruise_main.h"

namespace Cruise {

// 4 type bigger than the old one, but much safer/cleaner
stackElementStruct scriptStack[SIZE_STACK];

// VAR

void pushVar(int16 var)
{
  if(positionInStack<SIZE_STACK)
  {
    scriptStack[positionInStack].data.shortVar = var;
    scriptStack[positionInStack].type = STACK_SHORT;
    positionInStack++;
  }
}

int16 popVar(void)
{
  if(positionInStack<=0)
  {
    return(0);
  }

  positionInStack--;
  
  ASSERT(scriptStack[positionInStack].type == STACK_SHORT);

  return(scriptStack[positionInStack].data.shortVar);
}

//// PTR

void pushPtr(void* ptr)
{
  if(positionInStack<SIZE_STACK)
  {
    scriptStack[positionInStack].data.ptrVar = ptr;
    scriptStack[positionInStack].type = STACK_PTR;
    positionInStack++;
  }
}

void* popPtr()
{
  if(positionInStack<=0)
  {
    return(0);
  }

  positionInStack--;
  
  ASSERT(scriptStack[positionInStack].type == STACK_PTR);

  return(scriptStack[positionInStack].data.ptrVar);
}

} // End of namespace Cruise