/** Returns the number of rail types the player can build

  * @param *p Player in question

  */

static inline int GetNumRailtypes(const Player *p)

{

	int num = 0;

	int i;

	for (i = 0; i < (int)sizeof(p->avail_railtypes) * 8; i++)

		if (HASBIT(p->avail_railtypes, i)) num++;

	assert(num <= RAILTYPE_END);

	return num;

}