-extern EMACS_INT
-emacs_gnutls_write (struct Lisp_Process *proc, const char *buf, EMACS_INT nbyte);
-extern EMACS_INT
-emacs_gnutls_read (struct Lisp_Process *proc, char *buf, EMACS_INT nbyte);
+#define GNUTLS_LOG2i(level, max, string, extra) do { if (level <= max) { gnutls_log_function2i (level, "(Emacs) " string, extra); } } while (0)
+
+extern ptrdiff_t
+emacs_gnutls_write (struct Lisp_Process *proc, const char *buf, ptrdiff_t nbyte);
+extern ptrdiff_t
+emacs_gnutls_read (struct Lisp_Process *proc, char *buf, ptrdiff_t nbyte);