1;;; -*- mode: scheme; coding: utf-8; -*- 2;;; 3;;; Copyright (C) 1999, 2001, 2004, 2006, 2017 Free Software Foundation, Inc. 4;;; 5;;; This library is free software; you can redistribute it and/or 6;;; modify it under the terms of the GNU Lesser General Public 7;;; License as published by the Free Software Foundation; either 8;;; version 3 of the License, or (at your option) any later version. 9;;; 10;;; This library is distributed in the hope that it will be useful, 11;;; but WITHOUT ANY WARRANTY; without even the implied warranty of 12;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13;;; Lesser General Public License for more details. 14;;; 15;;; You should have received a copy of the GNU Lesser General Public 16;;; License along with this library; if not, write to the Free Software 17;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 18 19(define-module (ice-9 arrays) 20 #:use-module (rnrs io ports) 21 #:use-module (srfi srfi-1) 22 #:export (array-copy)) 23 24;; This is actually defined in boot-9.scm, apparently for backwards 25;; compatibility. 26 27;; (define (array-shape a) 28;; (map (lambda (ind) (if (number? ind) (list 0 (+ -1 ind)) ind)) 29;; (array-dimensions a))) 30 31; FIXME writes over the array twice if (array-type) is #t 32(define (array-copy a) 33 (let ((b (apply make-typed-array (array-type a) *unspecified* (array-shape a)))) 34 (array-copy! a b) 35 b)) 36 37 38;; Printing arrays 39 40;; The dimensions aren't printed out unless they cannot be deduced from 41;; the content, which happens only when certain axes are empty. #:dims? 42;; can be used to force this printing. An array with all the dimensions 43;; printed out is still readable syntax, this can be useful for 44;; truncated-print. 45 46(define* (array-print-prefix a port #:key dims?) 47 (put-char port #\#) 48 (display (array-rank a) port) 49 (let ((t (array-type a))) 50 (unless (eq? #t t) 51 (display t port))) 52 (let ((ss (array-shape a))) 53 (let loop ((s ss) (slos? #f) (szero? #f) (slens? dims?)) 54 (define lo caar) 55 (define hi cadar) 56 (if (null? s) 57 (when (or slos? slens?) 58 (pair-for-each (lambda (s) 59 (when slos? 60 (put-char port #\@) 61 (display (lo s) port)) 62 (when slens? 63 (put-char port #\:) 64 (display (- (hi s) (lo s) -1) port))) 65 ss)) 66 (let ((zero-size? (zero? (- (hi s) (lo s) -1)))) 67 (loop (cdr s) 68 (or slos? (not (zero? (lo s)))) 69 (or szero? zero-size?) 70 (or slens? (and (not zero-size?) szero?)))))))) 71