void citizens_update(struct city *pcity)
{
int delta;
fc_assert_ret(pcity);
if (pcity->server.debug) {
/* before */
citizens_print(pcity);
}
if (game.info.citizen_nationality != TRUE) {
return;
}
if (pcity->nationality == NULL) {
/* If nationalities are not set (virtual cities) do nothing. */
return;
}
delta = city_size_get(pcity) - citizens_count(pcity);
if (delta == 0) {
/* No change of the city size */
return;
}
if (delta > 0) {
/* Add new citizens with the nationality of the current owner. */
citizens_nation_add(pcity, city_owner(pcity)->slot, delta);
log_citizens_add(pcity, delta, city_owner(pcity));
} else {
/* Removed citizens. */
struct player_slot *city_nations[MAX_NUM_PLAYER_SLOTS];
int count = 0;
/* Create a list of foreign nationalities. */
citizens_foreign_iterate(pcity, pslot, nationality) {
city_nations[count] = pslot;
count++;
} citizens_foreign_iterate_end;
/* First remove from foreign nationalities. */
while (count > 0 && delta < 0) {
int select = fc_rand(count);
struct player_slot *pslot = city_nations[select];
struct player *pplayer = player_slot_get_player(pslot);
citizens nationality = citizens_nation_get(pcity, pslot);
fc_assert_ret(nationality != 0);
fc_assert_ret(pplayer != NULL);
if (nationality == 1) {
/* Remove one citizen. */
delta++;
citizens_nation_set(pcity, pslot, 0);
/* Remove this nation from the list of nationalities. */
if (select != count) {
city_nations[select] = city_nations[count - 1];
}
count--;
log_citizens_add(pcity, -1, pplayer);
} else {
/* Get the minimal reduction = the maximum value of two negative
* numbers. */
int diff = MAX(delta, - nationality / 2);
delta -= diff;
citizens_nation_add(pcity, pslot, diff);
log_citizens_add(pcity, diff, pplayer);
}
}
if (delta < 0) {
/* Now take the remaining citizens loss from the nation of the owner. */
citizens_nation_add(pcity, city_owner(pcity)->slot, delta);
log_citizens_add(pcity, delta, city_owner(pcity));
}
}
/*****************************************************************************
The name of the player's nation for the plrdlg.
*****************************************************************************/
static const char *col_nation(const struct city *pcity,
const struct player_slot *pslot)
{
return nation_adjective_for_player(player_slot_get_player(pslot));
}
