| ;;; R7RS compatibility libraries | |
| ;;; Copyright (C) 2019 Free Software Foundation, Inc. | |
| ;;; | |
| ;;; This library is free software: you can redistribute it and/or modify | |
| ;;; it under the terms of the GNU Lesser General Public License as | |
| ;;; published by the Free Software Foundation, either version 3 of the | |
| ;;; License, or (at your option) any later version. | |
| ;;; | |
| ;;; This library 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. | |
| ;;; | |
| ;;; You should have received a copy of the GNU Lesser General Public | |
| ;;; License along with this program. If not, see | |
| ;;; <http://www.gnu.org/licenses/>. | |
| ;;; Based on code from https://gitlab.com/akku/akku-scm, written | |
| ;;; 2018-2019 by Göran Weinholt <[email protected]>, as well as | |
| ;;; https://github.com/okuoku/yuni, written 2014-2018 by OKUMURA Yuki | |
| ;;; <[email protected]>. This code was originally released under the | |
| ;;; following terms: | |
| ;;; | |
| ;;; To the extent possible under law, the author(s) have dedicated | |
| ;;; all copyright and related and neighboring rights to this | |
| ;;; software to the public domain worldwide. This software is | |
| ;;; distributed without any warranty. | |
| ;;; | |
| ;;; See <http://creativecommons.org/publicdomain/zero/1.0/>, for a | |
| ;;; copy of the CC0 Public Domain Dedication. | |
| (define-module (scheme inexact) | |
| #:re-export ((exact->inexact . inexact) | |
| (inexact->exact . exact) | |
| acos asin atan cos exp sin sqrt tan) | |
| #:export ((r7:finite? . finite?) | |
| (r7:infinite? . infinite?) | |
| (r7:nan? . nan?) | |
| (r7:log . log))) | |
| (define (r7:finite? z) | |
| (if (complex? z) | |
| (and (finite? (real-part z)) | |
| (finite? (imag-part z))) | |
| (finite? z))) | |
| (define (r7:infinite? z) | |
| (if (complex? z) | |
| (or (inf? (real-part z)) | |
| (inf? (imag-part z))) | |
| (inf? z))) | |
| (define (r7:nan? z) | |
| (if (complex? z) | |
| (or (nan? (real-part z)) | |
| (nan? (imag-part z))) | |
| (nan? z))) | |
| (define r7:log | |
| (case-lambda | |
| ((x) (log x)) | |
| ((x y) (/ (log x) (log y))))) | |