text: /* $Id$ */
  
  /*
   * This file is part of OpenTTD.
   * OpenTTD 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, version 2.
   * OpenTTD 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 OpenTTD. If not, see <http://www.gnu.org/licenses/>.
   */
  
  /** @file newgrf_town.cpp Implementation of the town part of NewGRF houses. */
  
  #include "stdafx.h"
  #include "debug.h"
  #include "town.h"
  
  /**
   * This function implements the town variables that newGRF defines.
   * @param variable that is queried
   * @param parameter unused
   * @param available will return false if ever the variable asked for does not exist
   * @param t is of course the town we are inquiring
   * @return the value stored in the corresponding variable
   */
  uint32 TownGetVariable(byte variable, byte parameter, bool *available, const Town *t)
  {
  	switch (variable) {
  		/* Larger towns */
  		case 0x40:
  			if (_settings_game.economy.larger_towns == 0) return 2;
  			if (t->larger_town) return 1;
  			return 0;
  
  		/* Town index */
  		case 0x41: return t->index;
  
  		/* Town properties */
  		case 0x80: return t->xy;
  		case 0x81: return GB(t->xy, 8, 8);
  		case 0x82: return ClampToU16(t->population);
  		case 0x83: return GB(ClampToU16(t->population), 8, 8);
  		case 0x8A: return t->grow_counter;
  		case 0x92: return t->flags;  // In original game, 0x92 and 0x93 are really one word. Since flags is a byte, this is to adjust
  		case 0x93: return 0;
  		case 0x94: return ClampToU16(t->squared_town_zone_radius[0]);
  		case 0x95: return GB(ClampToU16(t->squared_town_zone_radius[0]), 8, 8);
  		case 0x96: return ClampToU16(t->squared_town_zone_radius[1]);
  		case 0x97: return GB(ClampToU16(t->squared_town_zone_radius[1]), 8, 8);
  		case 0x98: return ClampToU16(t->squared_town_zone_radius[2]);
  		case 0x99: return GB(ClampToU16(t->squared_town_zone_radius[2]), 8, 8);
  		case 0x9A: return ClampToU16(t->squared_town_zone_radius[3]);
  		case 0x9B: return GB(ClampToU16(t->squared_town_zone_radius[3]), 8, 8);
  		case 0x9C: return ClampToU16(t->squared_town_zone_radius[4]);
  		case 0x9D: return GB(ClampToU16(t->squared_town_zone_radius[4]), 8, 8);
  		case 0x9E: return t->ratings[0];
  		case 0x9F: return GB(t->ratings[0], 8, 8);
  		case 0xA0: return t->ratings[1];
  		case 0xA1: return GB(t->ratings[1], 8, 8);
  		case 0xA2: return t->ratings[2];
  		case 0xA3: return GB(t->ratings[2], 8, 8);
  		case 0xA4: return t->ratings[3];
  		case 0xA5: return GB(t->ratings[3], 8, 8);
  		case 0xA6: return t->ratings[4];
  		case 0xA7: return GB(t->ratings[4], 8, 8);
  		case 0xA8: return t->ratings[5];
  		case 0xA9: return GB(t->ratings[5], 8, 8);
  		case 0xAA: return t->ratings[6];
  		case 0xAB: return GB(t->ratings[6], 8, 8);
  		case 0xAC: return t->ratings[7];
  		case 0xAD: return GB(t->ratings[7], 8, 8);
  		case 0xAE: return t->have_ratings;
  		case 0xB2: return t->statues;
  		case 0xB6: return ClampToU16(t->num_houses);
  		case 0xB9: return t->growth_rate;
  		case 0xBA: return ClampToU16(t->new_max_pass);
  		case 0xBB: return GB(ClampToU16(t->new_max_pass), 8, 8);
  		case 0xBC: return ClampToU16(t->new_max_mail);
  		case 0xBD: return GB(ClampToU16(t->new_max_mail), 8, 8);
  		case 0xBE: return ClampToU16(t->new_act_pass);
  		case 0xBF: return GB(ClampToU16(t->new_act_pass), 8, 8);
  		case 0xC0: return ClampToU16(t->new_act_mail);
  		case 0xC1: return GB(ClampToU16(t->new_act_mail), 8, 8);
  		case 0xC2: return ClampToU16(t->max_pass);
  		case 0xC3: return GB(ClampToU16(t->max_pass), 8, 8);
  		case 0xC4: return ClampToU16(t->max_mail);
  		case 0xC5: return GB(ClampToU16(t->max_mail), 8, 8);
  		case 0xC6: return ClampToU16(t->act_pass);
  		case 0xC7: return GB(ClampToU16(t->act_pass), 8, 8);
  		case 0xC8: return ClampToU16(t->act_mail);
  		case 0xC9: return GB(ClampToU16(t->act_mail), 8, 8);
  		case 0xCA: return t->pct_pass_transported;
  		case 0xCB: return t->pct_mail_transported;
  		case 0xCC: return t->new_act_food;
  		case 0xCD: return GB(t->new_act_food, 8, 8);
  		case 0xCE: return t->new_act_water;
  		case 0xCF: return GB(t->new_act_water, 8, 8);
  		case 0xD0: return t->act_food;
  		case 0xD1: return GB(t->act_food, 8, 8);
  		case 0xD2: return t->act_water;
  		case 0xD3: return GB(t->act_water, 8, 8);
  		case 0xD4: return t->road_build_months;
  		case 0xD5: return t->fund_buildings_months;
  	}
  
  	DEBUG(grf, 1, "Unhandled town variable 0x%X", variable);
  
  	*available = false;
  	return UINT_MAX;
  }
  