#include <stdio.h>

#include <stdarg.h>

#include <unistd.h>

/* TODO: not thread-safe nor fork-safe */

static volatile int test_status;

#define TEST_LOC2(l) __FILE__ ":" #l

#define TEST_LOC1(l) TEST_LOC2(l)

#define error(...) test_printf("ERROR " TEST_LOC1(__LINE__) ": " __VA_ARGS__)

static int test_printf(const char *s, ...)

{

	va_list ap;

	char buf[512];

	int n;

	test_status = 1;

	va_start(ap, s);

	n = vsnprintf(buf, sizeof buf, s, ap);

	va_end(ap);

	if (n < 0)

		n = 0;

	else if (n >= sizeof buf) {

		n = sizeof buf;

		buf[n - 1] = '\n';

		buf[n - 2] = '.';

		buf[n - 3] = '.';

		buf[n - 4] = '.';

	}

	return write(1, buf, n);

}