+DEFUN ("subr-arity", Fsubr_arity, Ssubr_arity, 1, 1, 0,
+ doc: /* Return minimum and maximum number of args allowed for SUBR.
+SUBR must be a built-in function.
+The returned value is a pair (MIN . MAX). MIN is the minimum number
+of args. MAX is the maximum number or the symbol `many', for a
+function with `&rest' args, or `unevalled' for a special form. */)
+ (subr)
+ Lisp_Object subr;
+{
+ short minargs, maxargs;
+ CHECK_SUBR (subr);
+ minargs = XSUBR (subr)->min_args;
+ maxargs = XSUBR (subr)->max_args;
+ if (maxargs == MANY)
+ return Fcons (make_number (minargs), Qmany);
+ else if (maxargs == UNEVALLED)
+ return Fcons (make_number (minargs), Qunevalled);
+ else
+ return Fcons (make_number (minargs), make_number (maxargs));
+}
+
+DEFUN ("subr-name", Fsubr_name, Ssubr_name, 1, 1, 0,
+ doc: /* Return name of subroutine SUBR.
+SUBR must be a built-in function. */)
+ (subr)
+ Lisp_Object subr;
+{
+ const char *name;
+ CHECK_SUBR (subr);
+ name = XSUBR (subr)->symbol_name;
+ return make_string (name, strlen (name));
+}
+
+DEFUN ("interactive-form", Finteractive_form, Sinteractive_form, 1, 1, 0,
+ doc: /* Return the interactive form of CMD or nil if none.
+If CMD is not a command, the return value is nil.
+Value, if non-nil, is a list \(interactive SPEC). */)
+ (cmd)
+ Lisp_Object cmd;
+{
+ Lisp_Object fun = indirect_function (cmd);
+
+ if (SUBRP (fun))
+ {
+ if (XSUBR (fun)->prompt)
+ return list2 (Qinteractive, build_string (XSUBR (fun)->prompt));
+ }
+ else if (COMPILEDP (fun))
+ {
+ if ((ASIZE (fun) & PSEUDOVECTOR_SIZE_MASK) > COMPILED_INTERACTIVE)
+ return list2 (Qinteractive, AREF (fun, COMPILED_INTERACTIVE));
+ }
+ else if (CONSP (fun))
+ {
+ Lisp_Object funcar = XCAR (fun);
+ if (EQ (funcar, Qlambda))
+ return Fassq (Qinteractive, Fcdr (XCDR (fun)));
+ else if (EQ (funcar, Qautoload))
+ {
+ struct gcpro gcpro1;
+ GCPRO1 (cmd);
+ do_autoload (fun, cmd);
+ UNGCPRO;
+ return Finteractive_form (cmd);
+ }
+ }
+ return Qnil;
+}
+