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;;; 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)))))
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