Function: math-float-parts

math-float-parts is an autoloaded and byte-compiled function defined in calc-bin.el.gz.

Signature

(math-float-parts A NEED-FRAC)

Source Code

;; Defined in /usr/src/emacs/lisp/calc/calc-bin.el.gz
;;; Decompose into integer and fractional parts, without depending
;;; on calc-internal-prec.
(defun math-float-parts (a need-frac)    ; returns ( int frac fracdigs )
  (if (>= (nth 2 a) 0)
      (list (math-scale-rounding (nth 1 a) (nth 2 a)) '(float 0 0) 0)
    (let* ((d (math-numdigs (nth 1 a)))
	   (n (- (nth 2 a))))
      (if need-frac
	  (if (>= n d)
	      (list 0 a n)
	    (let ((qr (math-idivmod (nth 1 a) (math-scale-int 1 n))))
	      (list (car qr) (math-make-float (cdr qr) (- n)) n)))
	(list (math-scale-rounding (nth 1 a) (nth 2 a))
	      '(float 0 0) 0)))))