+#include <sys/types.h>
+
#ifndef PARAMS
# if defined PROTOTYPES || (defined __STDC__ && __STDC__)
# define PARAMS(Args) Args
extern void (*xalloc_fail_func) ();
void *xmalloc PARAMS ((size_t n));
+void *xmalloc_and_zero PARAMS ((size_t n));
void *xcalloc PARAMS ((size_t n, size_t s));
void *xrealloc PARAMS ((void *p, size_t n));
+
+char *xstrdup PARAMS ((const char *s));