#define pr_err(fmt ...) fprintf(stderr, Name ": " fmt)
#define cont_err(fmt ...) fprintf(stderr, " " fmt)
+void *xmalloc(size_t len);
+void *xrealloc(void *ptr, size_t len);
+void *xcalloc(size_t num, size_t size);
+char *xstrdup(const char *str);
+
#define LEVEL_MULTIPATH (-4)
#define LEVEL_LINEAR (-1)
#define LEVEL_FAULTY (-5)