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- ;;;; "arraymap.scm", applicative routines for arrays in Scheme.
- ;;; Copyright (c) 1993 Aubrey Jaffer
- ;
- ;Permission to copy this software, to redistribute it, and to use it
- ;for any purpose is granted, subject to the following restrictions and
- ;understandings.
- ;
- ;1. Any copy made of this software must include this copyright notice
- ;in full.
- ;
- ;2. I have made no warrantee or representation that the operation of
- ;this software will be error-free, and I am under no obligation to
- ;provide any services, by way of maintenance, update, or otherwise.
- ;
- ;3. In conjunction with products arising from the use of this
- ;material, there shall be no use of my name in any advertising,
- ;promotional, or sales literature without prior written consent in
- ;each case.
-
- (require 'array)
-
- (define (array-map! ra0 proc . ras)
- (define (ramap rshape inds)
- (if (null? (cdr rshape))
- (do ((i (cadar rshape) (+ -1 i))
- (is (cons (cadar rshape) inds)
- (cons (+ -1 i) inds)))
- ((< i (caar rshape)))
- (apply array-set! ra0
- (apply proc (map (lambda (ra) (apply array-ref ra is))
- ras))
- is))
- (let ((crshape (cdr rshape))
- (ll (caar rshape)))
- (do ((i (cadar rshape) (+ -1 i)))
- ((< i ll))
- (ramap crshape (cons i inds))))))
- (ramap (reverse (array-shape ra0)) '()))
-
- (define (array-for-each proc . ras)
- (define (rafe rshape inds)
- (if (null? (cdr rshape))
- (do ((i (caar rshape) (+ 1 i)))
- ((> i (cadar rshape)))
- (apply proc
- (map (lambda (ra)
- (apply array-ref ra (reverse (cons i inds)))) ras)))
- (let ((crshape (cdr rshape))
- (ll (cadar rshape)))
- (do ((i (caar rshape) (+ 1 i)))
- ((> i ll))
- (rafe crshape (cons i inds))))))
- (rafe (array-shape (car ras)) '()))
-
- (define (shape->indexes shape)
- (define ra0 (apply make-array '() shape))
- (define (ramap rshape inds)
- (if (null? (cdr rshape))
- (do ((i (cadar rshape) (+ -1 i))
- (is (cons (cadar rshape) inds)
- (cons (+ -1 i) inds)))
- ((< i (caar rshape)))
- (apply array-set! ra0 is is))
- (let ((crshape (cdr rshape))
- (ll (caar rshape)))
- (do ((i (cadar rshape) (+ -1 i)))
- ((< i ll))
- (ramap crshape (cons i inds))))))
- (ramap (reverse shape) '())
- ra0)
-
- (define (array-indexes ra)
- (shape->indexes (array-shape ra)))
-