74 lines
2.6 KiB
Common Lisp
74 lines
2.6 KiB
Common Lisp
;;; -*- Mode: Lisp; Syntax: Common-Lisp; Package: RUNES; -*-
|
|
;;; ---------------------------------------------------------------------------
|
|
;;; Title: Some common utilities for the Closure browser
|
|
;;; Created: 1997-12-27
|
|
;;; Author: Gilbert Baumann <unk6@rz.uni-karlsruhe.de>
|
|
;;; License: Lisp-LGPL (See file COPYING for details).
|
|
;;; ---------------------------------------------------------------------------
|
|
;;; (c) copyright 1997-1999 by Gilbert Baumann
|
|
|
|
;;; This code is free software; you can redistribute it and/or modify it
|
|
;;; under the terms of the version 2.1 of the GNU Lesser General Public
|
|
;;; License as published by the Free Software Foundation, as clarified
|
|
;;; by the "Preamble to the Gnu Lesser General Public License" found in
|
|
;;; the file COPYING.
|
|
;;;
|
|
;;; This code is distributed in the hope that it will be useful,
|
|
;;; but without any warranty; without even the implied warranty of
|
|
;;; merchantability or fitness for a particular purpose. See the GNU
|
|
;;; Lesser General Public License for more details.
|
|
;;;
|
|
;;; Version 2.1 of the GNU Lesser General Public License is in the file
|
|
;;; COPYING that was distributed with this file. If it is not present,
|
|
;;; you can access it from http://www.gnu.org/copyleft/lesser.txt (until
|
|
;;; superseded by a newer version) or write to the Free Software
|
|
;;; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
|
;; Changes
|
|
;;
|
|
;; When Who What
|
|
;; ----------------------------------------------------------------------------
|
|
;; 1999-08-24 GB = fixed MULTIPLE-VALUE-OR it now takes any number of
|
|
;; subforms
|
|
;;
|
|
|
|
(in-package :cxml)
|
|
|
|
;;; --------------------------------------------------------------------------------
|
|
;;; Meta functions
|
|
|
|
(defun curry (fun &rest args)
|
|
#'(lambda (&rest more)
|
|
(apply fun (append args more))))
|
|
|
|
(defun rcurry (fun &rest args)
|
|
#'(lambda (&rest more)
|
|
(apply fun (append more args))))
|
|
|
|
(defun compose (f g)
|
|
#'(lambda (&rest args)
|
|
(funcall f (apply g args))))
|
|
|
|
;;; --------------------------------------------------------------------------------
|
|
;;; while and until
|
|
|
|
(defmacro while (test &body body)
|
|
`(until (not ,test) ,@body))
|
|
|
|
(defmacro until (test &body body)
|
|
`(do () (,test) ,@body))
|
|
|
|
;; prime numbers
|
|
|
|
(defun primep (n)
|
|
"Returns true, iff `n' is prime."
|
|
(and (> n 2)
|
|
(do ((i 2 (+ i 1)))
|
|
((> (* i i) n) t)
|
|
(cond ((zerop (mod n i)) (return nil))))))
|
|
|
|
(defun nearest-greater-prime (n)
|
|
"Returns the smallest prime number no less than `n'."
|
|
(cond ((primep n) n)
|
|
((nearest-greater-prime (+ n 1)))))
|