909 

   909 /*

   910 

   910  * returns true if an engine is valid, and it is of the specified type, and buildable by the current player, false otherwise

   911  *

   912  * engine = index of the engine to check

   913  * type   = the type the engine should be of (VEH_xxx)

   914  */

   915 bool IsEngineBuildable(int engine, byte type) {

   916 	Engine *e;

   917 

   918 	// check if it's an engine that is in the engine array

   919 	if (0 > engine || engine >= TOTAL_NUM_ENGINES ) return false;

   920 

   921 	e = DEREF_ENGINE(engine);

   922 

   923 	// check if it's an engine of specified type

   924 	if (e->type != type) return false;

   925 

   926 	// check if it's available

   927 	if (!HASBIT(e->player_avail, _current_player)) return false;

   928 

   929 	return true;

   930 }

   931 

   932 

   933 

   934