-#define vmefail() (fprintf(stderr, "virtual memory exhausted.\n"), exit(EXIT_FAILURE), NULL)
-#define xstrdup(_str) (strcpy((malloc(strlen(_str)+1) ? : vmefail()), (_str)))
+static inline char *
+xstrdup(const char *s)
+{
+ size_t memsize = strlen(s) + 1;
+ char *ptr = malloc(memsize);
+ if (!ptr) {
+ fprintf(stderr, "virtual memory exhausted.\n");
+ exit(EXIT_FAILURE);
+ }
+ strlcpy(ptr, s, memsize);
+ return ptr;
+}