127 void    *xrealloc(void *ptr, size_t size);
575     void *ptr;  in xmalloc()  local
577     ptr = malloc(size);  in xmalloc()
579     if ( !ptr )  in xmalloc()
582     return ptr;  in xmalloc()
589     void *ptr;  in xcalloc()  local
591     ptr = calloc(nmemb, size);  in xcalloc()
593     if ( !ptr )  in xcalloc()
596     return ptr;  in xcalloc()
600 xrealloc(void *ptr, size_t size)  in xrealloc()  argument
602     ptr = realloc(ptr, size);  in xrealloc()
604     if ( !ptr )  in xrealloc()
607     return ptr;  in xrealloc()