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authorBryan Newbold <bnewbold@robocracy.org>2017-02-20 00:05:26 -0800
committerBryan Newbold <bnewbold@robocracy.org>2017-02-20 00:05:26 -0800
commitf24b9140d6f74804d5599ec225717d38ca443813 (patch)
tree0da952f1a5a7c0eacfc05c296766523e32c05fe2 /arraymap.scm
parent8ffbc2df0fde83082610149d24e594c1cd879f4a (diff)
downloadslib-f24b9140d6f74804d5599ec225717d38ca443813.tar.gz
slib-f24b9140d6f74804d5599ec225717d38ca443813.zip
Import Upstream version 2c0upstream/2c0
Diffstat (limited to 'arraymap.scm')
-rw-r--r--arraymap.scm14
1 files changed, 8 insertions, 6 deletions
diff --git a/arraymap.scm b/arraymap.scm
index 18ee64a..d3dedba 100644
--- a/arraymap.scm
+++ b/arraymap.scm
@@ -52,25 +52,27 @@
(rafe crshape (cons i inds))))))
(rafe (array-shape (car ras)) '()))
-(define (shape->indexes shape)
- (define ra0 (apply make-array '() shape))
+(define (array-index-map! ra fun)
(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))
+ (apply array-set! ra (apply fun 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)
+ (if (zero? (array-rank ra))
+ (array-set! ra (fun))
+ (ramap (reverse (array-shape ra)) '())))
(define (array-indexes ra)
- (shape->indexes (array-shape ra)))
+ (let ((ra0 (apply make-array '() (array-shape ra))))
+ (array-index-map! ra0 list)
+ ra0))
(define (array-copy! source dest)
(array-map! dest identity source))