-#if __STDC__ || defined(STDC_HEADERS)
-# include <stdlib.h>
-#else
-char *malloc ();
-char *getenv ();
-#endif
-static void *xmalloc (unsigned int);
-static void *xrealloc (char *ptr, unsigned int);
+static void *xmalloc (size_t);
+static void *xrealloc (void *, size_t);