/* Overengineered "die" Funktion (17Nov22)
 *
 * Usage:
 *
 * - die("Something went wrong") -> fprintf + exit
 * - die(":ferror")              -> perror + exit
 * */

#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>

__attribute__((noreturn))
static void
_die(char *file, unsigned line, char msg[static 1], ...)
{
    va_list ap;
    assert(msg != NULL);

#ifndef NDEBUG
    fprintf(stderr, "%s:%d: ", file, line);
#endif
    if (msg[0] == ':') {
	perror(msg + 1);
    } else {
	va_start(ap, msg);
	vfprintf(stderr, msg, ap);
	va_end(ap);
	fputs("\n", stderr);
    }

    exit(EXIT_FAILURE);
}

#define die(msg, ...) _die(__FILE__, __LINE__, msg, ## __VA_ARGS__)