Function: cl-round

cl-round is an autoloaded and byte-compiled function defined in cl-extra.el.gz.

Signature

(cl-round X &optional Y)

Documentation

Return a list of X rounded to the nearest integer and the remainder.

With two arguments, return rounding and remainder of their quotient.

View in manual

Aliases

round* (obsolete since 27.1)

Source Code

;; Defined in /usr/src/emacs/lisp/emacs-lisp/cl-extra.el.gz
;;;###autoload
(defun cl-round (x &optional y)
  "Return a list of X rounded to the nearest integer and the remainder.
With two arguments, return rounding and remainder of their quotient."
  (declare (side-effect-free t))
  (if y
      (if (and (integerp x) (integerp y))
	  (let* ((hy (/ y 2))
		 (res (cl-floor (+ x hy) y)))
	    (if (and (= (car (cdr res)) 0)
		     (= (+ hy hy) y)
		     (oddp (car res)))
		(list (1- (car res)) hy)
	      (list (car res) (- (car (cdr res)) hy))))
	(let ((q (round (/ x y))))
	  (list q (- x (* q y)))))
    (if (integerp x) (list x 0)
      (let ((q (round x)))
	(list q (- x q))))))