void remove_dead_agents(void) {
for(agent_iter iter=agents.begin(); iter != agents.end() ; iter++) {
if(is_dead(*iter)) {
(*iter)->kill(0);
printf("kill %s\n", (*iter)->getName().c_str());
}
}
int status; pid_t dead_pid;
while ((dead_pid = waitpid(-1, &status, WNOHANG))>0) {
agent_iter iter = find_if(agents.begin(), agents.end(), bind2nd(pid_equal<Agent*>(), dead_pid));
if(iter != agents.end()) {
Agent * deadAgent = *iter;
stringstream msg;
msg<<deadAgent->getName();
switch(deadAgent->attr.status) {
case EATEN: msg<<" has been eaten"; break;
default: msg<<" has died"; break;
}
add_announcement(msg.str().c_str(), deadAgent->get_location(), 25);
delete deadAgent;
agents.erase(iter);
}
}
}
int check_for_message(int sock, int myPort) {
static char * data=0;
char data_copy[MAXMSGSIZE+1];
int message_length, sender_port;
if(!data) data = new char[MAXMSGSIZE+1];
MessageType type = get_message(sock, &data, message_length, &sender_port);
if(type==NO_MESSAGE) return 0;
//printf("world recvd %i from port %i\n", type, sender_port);
Agent * sender = get_agent_by_port(sender_port);
switch(type) {
/* broadcast to all agents */
case SOUND:
if(sender) {
for(int i=0 ; i < message_length ; i++) {
if(isprint(data[i])) {
data_copy[i]=data[i];
} else {
data_copy[i]='.';
}
}
data_copy[message_length]=0;
add_announcement(data_copy, sender->get_location(), 20);
}
for (unsigned int i=0;i<agents.size();i++) {
/*int bytes_sent = */send_message(sender_port, agents[i]->get_port(), type, message_length, data);
//printf("re-broadcast sound from %i to %i (%i bytes sent)\n", sender_port, agents[i]->get_port(), bytes_sent);
}
break;
case NEW_ORGANISM:
{
char * filename = getStringFromData(data, message_length);
int child_id;
if(sender) {
child_id = sender->have_child(filename);
if(child_id > 0) send_message(myPort, sender_port, type, sizeof(int), (char*)&child_id);
}
delete [] filename;
}
break;
case KILL:
{
int target;
memcpy(&target, data, sizeof(int));
if(target==myPort) {
kill_all_agents();
} else {
Agent * victim = get_agent_by_port(target);
if(sender && victim) {
sender->attack(victim);
}
}
}
break;
case VISION:
if(sender) sender->set_appearance(data, message_length);
break;
case MOVE:
if(sender) {
char x, y;
memcpy(&x, data, sizeof(char));
data+=sizeof(char);
memcpy(&y, data, sizeof(char));
//printf("move x,y %i,%i\n", x, y);
sender->move(x, y);
}
break;
case TURN:
if(sender) {
char angle;
memcpy(&angle, data, sizeof(char));
//printf("turn angle %i\n", angle);
sender->turn(angle);
}
break;
case EAT:
if(sender) {
int target;
memcpy(&target, data, sizeof(int));
attempt_to_eat(sender, myPort, target);
}
break;
default:
printf("unhandled message %i\n", type);
break;
}
return 1;
}