#include "lib.h"

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

__attribute__((__noreturn__))
static void die() {
	exit(1);
}

void error_and_die(char *format, ...) {
	va_list list;
	va_start(list, format);

	vfprintf(stderr, format, list);

	die();
}

__attribute__((__noreturn__, format(printf, 1, 2)))
void perror_and_die(char *format, ...) {
	va_list list;
	va_start(list, format);

	vfprintf(stderr, format, list);
	perror(": ");

	die();
}

void *xalloc(size_t amount) {
	void *res = malloc(amount);
	if (res == NULL)
		error_and_die("failed to allocate memory");
	return res;
}

void *xzalloc(size_t amount) {
	void *res = xalloc(amount);
	memset(res, 0, sizeof(amount));
	return res;
}

void *xrealloc(void *ptr, size_t amount) {
	void *res = realloc(ptr, amount);
	if (res == NULL)
		error_and_die("failed to allocate memory");
	return res;
}