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#include <signal.h>
#include <unistd.h>
#include <chrono>
#include <iostream>
#include <stdexcept>
#include <thread>
#include <hwd.h>
using seconds = std::chrono::duration<double>;
volatile sig_atomic_t keep_running {true};
void termination_handler(int)
{
keep_running = false;
}
int main(int argc, char* argv[])
{
struct sigaction int_action;
int_action.sa_handler = termination_handler;
sigemptyset(&int_action.sa_mask);
int_action.sa_flags = 0;
sigaction(SIGINT, &int_action, nullptr);
seconds interval {0.01};
int samples = 0;
int opt = 0;
try {
while ((opt = getopt(argc, argv, "n:i:")) != -1) {
switch (opt) {
case 'i':
interval = seconds {std::stod(optarg)};
break;
case 'n':
samples = std::stoi(optarg);
break;
default:
std::cerr << "Usage: " << argv[0] << " [-i interval][-n samples]" << std::endl;
return 1;
}
}
}
catch (const std::invalid_argument& ia) {
std::cerr << "Invalid argument: " << ia.what() << std::endl;
return 1;
}
int i = 1;
while (keep_running) {
if (samples != 0 && i++ > samples)
break;
const auto end_time = std::chrono::high_resolution_clock::now() + interval;
std::cout << hwd::sinewave::get_point() << std::endl;
std::this_thread::sleep_until(end_time);
}
return 0;
}
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