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rubidium

(svn r20593) -Fix: (rlongago, r20547): long ago the service interval was int16, after which is got converted to Date except in the order backup. Much later I copied the savegame snippets from a vehicle and applied that on the order backup. Presto, reading/writing 32 bits (of Date) into 16 bits of ancient style service interval. That would then "spoil" the name pointer and that eventually crashes OpenTTD as it's likely to be an invalid pointer.

/* $Id$ */

/*
 * 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 townname_type.h
 * Definition of structures used for generating town names.
 */

#ifndef TOWNNAME_TYPE_H
#define TOWNNAME_TYPE_H

#include "newgrf_townname.h"

/**
 * Struct holding a parameters used to generate town name.
 * Speeds things up a bit because these values are computed only once per name generation.
 */
struct TownNameParams {
	uint32 grfid; ///< newgrf ID (0 if not used)
	uint16 type;  ///< town name style

	/**
	 * Initializes this struct from language ID
	 * @param town_name town name 'language' ID
	 */
	TownNameParams(byte town_name)
	{
		extern int _nb_orig_names;
		bool grf = town_name >= _nb_orig_names;
		this->grfid = grf ? GetGRFTownNameId(town_name - _nb_orig_names) : 0;
		this->type = grf ? GetGRFTownNameType(town_name - _nb_orig_names) : SPECSTR_TOWNNAME_START + town_name;
	}

	TownNameParams(const struct Town *t);
};

#endif /* TOWNNAME_TYPE_H */