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state.cpp

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2003-2006 The ScummVM project
 *
 * 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: https://svn.sourceforge.net/svnroot/scummvm/scummvm/tags/release-0-9-1/engines/queen/state.cpp $
 * $Id: state.cpp 20516 2006-02-11 10:07:12Z fingolfin $
 *
 */

#include "common/stdafx.h"
#include "queen/state.h"

namespace Queen {

Direction State::findDirection(uint16 state) {
      static const Direction sd[] = {
            DIR_BACK,
            DIR_RIGHT,
            DIR_LEFT,
            DIR_FRONT
      };
      return sd[(state >> 2) & 3];
}

StateTalk State::findTalk(uint16 state) {
      return (state & (1 << 9)) ? STATE_TALK_TALK : STATE_TALK_MUTE;
}

StateGrab State::findGrab(uint16 state) {
      static const StateGrab sg[] = {
            STATE_GRAB_NONE,
            STATE_GRAB_DOWN,
            STATE_GRAB_UP,
            STATE_GRAB_MID
      };
      return sg[state & 3];
}

StateOn State::findOn(uint16 state) {
      return (state & (1 << 8)) ? STATE_ON_ON : STATE_ON_OFF;
}

Verb State::findDefaultVerb(uint16 state) {
      static const Verb sdv[] = {
            VERB_NONE,
            VERB_OPEN,
            VERB_NONE,
            VERB_CLOSE,

            VERB_NONE,
            VERB_NONE,
            VERB_LOOK_AT,
            VERB_MOVE,

            VERB_GIVE,
            VERB_TALK_TO,
            VERB_NONE,
            VERB_NONE,

            VERB_USE,
            VERB_NONE,
            VERB_PICK_UP,
            VERB_NONE
      };
      return sdv[(state >> 4) & 0xF];
}

StateUse State::findUse(uint16 state) {
      return (state & (1 << 10)) ? STATE_USE : STATE_USE_ON;
}

void State::alterOn(uint16 *objState, StateOn state) {
      switch (state) {
      case STATE_ON_ON:
            *objState |= (1 << 8);
            break;
      case STATE_ON_OFF:
            *objState &= ~(1 << 8);
            break;
      }
}

void State::alterDefaultVerb(uint16 *objState, Verb v) {
      uint16 val;
      switch (v) {
      case VERB_OPEN:
            val = 1;
            break;
      case VERB_CLOSE:
            val = 3;
            break;
      case VERB_MOVE:
            val = 7;
            break;
      case VERB_GIVE:
            val = 8;
            break;
      case VERB_USE:
            val = 12;
            break;
      case VERB_PICK_UP:
            val = 14;
            break;
      case VERB_TALK_TO:
            val = 9;
            break;
      case VERB_LOOK_AT:
            val = 6;
            break;
      default:
            val = 0;
            break;
      }
      *objState = (*objState & ~0xF0) | (val << 4);
}

} // End of namespace Queen

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