import sys

struct sockaddr_in {
    sin_family Int16
    sin_port Int16
    sin_addr Int64
    sin_zero Int64
}

// Open server and client in 2 terminals:
// [1] q run examples/server
// [2] curl http://127.0.0.1:8080
main() {
	socket := sys.socket(2, 1, 0)

	if socket < 0 {
		sys.write(1, "socket error\n", 13)
		sys.exit(1)
	}

	addr := new(sockaddr_in)
	addr.sin_family = 2
	addr.sin_port = 0x901F
	addr.sin_addr = 0
	addr.sin_zero = 0

	if sys.bind(socket, addr, 20) != 0 {
		sys.write(1, "bind error\n", 11)
		sys.exit(1)
	}

	delete(addr)

	if sys.listen(socket, 128) != 0 {
		sys.write(1, "listen error\n", 13)
		sys.exit(1)
	}

	sys.write(1, "listening...\n", 13)

	loop {
		conn := sys.accept(socket, 0, 0)

		if conn >= 0 {
			sys.write(conn, "HTTP/1.1 200 OK\r\nContent-Length: 6\r\n\r\nHello\n", 44)
			sys.close(conn)
		} else {
			sys.write(1, "error\n", 6)
		}
	}
}