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|
use bufio;
use fmt;
use net;
use net::tcp;
use net::ip;
use io;
use os;
use fs;
use strings;
use time;
use time::date;
use time::chrono;
use unix::poll;
use drawing;
use drawing::{pos};
use packet_reader;
def PORT: u16 = 41460;
type conn = net::socket;
def CHUNKSIZE = 512;
export fn main() void = {
// create 4 pictures. later we will have more pictures
// but for now there are just 4, and they are at fixed positions
const offs: [_]pos = [
(0,0), (0,CHUNKSIZE), (CHUNKSIZE,0), (CHUNKSIZE,CHUNKSIZE),
];
let pictures: []drawing::picture = alloc([],len(offs));
for (let i = 0z; i < len(offs); i +=1){
append(pictures, drawing::picture {
w = CHUNKSIZE,
h = CHUNKSIZE,
d = alloc([0...],CHUNKSIZE*CHUNKSIZE: size): *[*]u32,
world_pos = offs[i],
});
};
for (const p &.. pictures) drawing::clear_picture(p, 0xffffff);
const listener = tcp::listen(ip::ANY_V4, PORT)!;
loop(listener, pictures);
};
def save_interval = 5 * time::SECOND;
fn save_world(pictures: []drawing::picture) void = {
fmt::printfln("saving world!")!;
for (const pic &.. pictures) {
const filename = fmt::asprintf("./c.{}.{}.ppm",pic.world_pos.0, pic.world_pos.1);
fmt::printfln("\t-> {}",filename)!;
defer free(filename);
const mode = fs::mode::USER_RW | fs::mode::GROUP_RW;
const file = os::create(filename, mode)!;
defer {
fmt::printfln("\t. {}",filename)!;
io::close(file)!;
};
const header = fmt::asprintf("P6\n{} {}\n{}\n", pic.w, pic.h, 255);
defer free(header);
io::writeall(file, strings::toutf8(header))!;
for (let i = 0z; i < pic.w * pic.h; i += 1) {
const px = pic.d[i];
io::writeall(file, [(px&0xff): u8, ((px>>8)&0xff): u8, ((px>>16)&0xff): u8])!;
};
};
};
fn loop(listener: net::socket, pictures: []drawing::picture) void = {
// pollfds[0] is the listener
// pollfds[n>0] corresponds to packet_readers[n-1]
let pollfds: []poll::pollfd = alloc([ poll::pollfd {
fd = listener, events = poll::event::POLLIN, revents = 0
}]);
let packet_readers: []packet_reader::packet_reader = [];
let now = time::now(time::clock::MONOTONIC);
let next = time::add(now, save_interval);
for (true) {
fmt::println("poll.")!;
const timeout = time::diff(now, next);
poll::poll(pollfds, timeout)!;
now = time::now(time::clock::MONOTONIC);
if (time::compare(now, next) >= 0) {
save_world(pictures);
next = time::add(now, save_interval);
};
if (0 != pollfds[0].revents & poll::event::POLLIN) {
fmt::println("new conn")!;
const new_conn = tcp::accept(pollfds[0].fd)!;
fmt::println("a")!;
append(pollfds, poll::pollfd {
fd = new_conn,
events = poll::event::POLLIN, revents = 0
});
append(packet_readers, packet_reader::new());
fmt::printfln("there are now {},{} conns.",len(pollfds),len(packet_readers))!;
};
for (let i = 1z; i < len(pollfds); i += 1) {
if (0 != pollfds[i].revents & poll::event::POLLIN) {
match (packet_reader::read(&packet_readers[i-1], pollfds[i].fd)) {
case void =>
let j = 1;
for (const packet_bytes => packet_reader::next(&packet_readers[i-1])) {
fmt::printf("#{}:{} got {:2}",i,j,len(packet_bytes))!;
j += 1;
for (let byte .. packet_bytes) fmt::printf(" {:x}",byte)!;
const op = drawing::deser_op(packet_bytes) as drawing::op_circle;
drawing::perform(pictures, op);
fmt::printfln("\t({:+6},{:+6})",op.0,op.1)!;
for (let k = 1z; k < len(pollfds); k += 1) {
if (k == i) continue;
fmt::printfln("\t -> #{}",k)!;
io::writeall(pollfds[k].fd, packet_bytes)!;
};
};
case let err: io::error =>
fmt::printfln("#{} error: {}",i,io::strerror(err))!;
delete(pollfds[i]);
delete(packet_readers[i-1]);
i -= 1;
case io::EOF =>
fmt::printfln("#{} disconnect",i)!;
delete(pollfds[i]);
delete(packet_readers[i-1]);
i -= 1;
};
};
};
};
};
|
