try/catch in plain c

try.c

#include <err.h>
#include <stdio.h>
#include <setjmp.h>
#include <signal.h>

static sigjmp_buf exception;

#define try	if (!sigsetjmp(exception, 1))
#define catch	else
#define throw	siglongjmp(exception, 1)

void
handler(int sig)
{
	throw;
}

void
init_try(void)
{
	struct sigaction sa;

	sigemptyset(&sa.sa_mask);
	sa.sa_flags = 0;
	sa.sa_handler = handler;
	sigaction(SIGFPE, &sa, NULL);
	sigaction(SIGSEGV, &sa, NULL);
}

int
main()
{
	int n = 0;

	init_try();

	try
		printf("%d\n", 1 / n);
	catch
		warnx("Look Ma, I divided by zero!");

	try
		((void (*)(void))NULL)();
	catch
		warnx("SIGSEGV you say? Well...");

	return 0;
}