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Knut Olav Bøhmer
alexandria
Commits
75f9136a
Commit
75f9136a
authored
Oct 30, 2011
by
Svante Carl v. Erichsen
Committed by
Nikodemus Siivola
Oct 30, 2011
Browse files
improved COPY-ARRAY
No need to depend on the vagaries of ADJUST-ARRAY.
parent
cd158549
Changes
2
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Inline
Side-by-side
arrays.lisp
View file @
75f9136a
(
in-package
:alexandria
)
(
defun
copy-array
(
array
&key
(
element-type
(
array-element-type
array
))
(
fill-pointer
(
and
(
array-has-fill-pointer-p
array
)
(
fill-pointer
array
)))
(
adjustable
(
adjustable-array-p
array
)))
(
defun
copy-array
(
array
&key
(
element-type
(
array-element-type
array
))
(
fill-pointer
(
and
(
array-has-fill-pointer-p
array
)
(
fill-pointer
array
)))
(
adjustable
(
adjustable-array-p
array
)))
"Returns an undisplaced copy of ARRAY, with same fill-pointer and
adjustability (if any) as the original, unless overridden by the keyword
arguments. Performance depends on efficiency of general ADJUST-ARRAY in the
host lisp -- for most cases a special purpose copying function is likely to
perform better."
(
let
((
dims
(
array-dimensions
array
)))
;; Dictionary entry for ADJUST-ARRAY requires adjusting a
;; displaced array to a non-displaced one to make a copy.
(
adjust-array
(
make-array
dims
:element-type
element-type
:fill-pointer
fill-pointer
:adjustable
adjustable
:displaced-to
array
)
dims
)))
arguments."
(
let*
((
dimensions
(
array-dimensions
array
))
(
new-array
(
make-array
dimensions
:element-type
element-type
:adjustable
adjustable
:fill-pointer
fill-pointer
)))
(
dotimes
(
i
(
array-total-size
array
))
(
setf
(
row-major-aref
new-array
i
)
(
row-major-aref
array
i
)))
new-array
))
tests.lisp
View file @
75f9136a
...
...
@@ -29,6 +29,24 @@
(
eql
(
fill-pointer
orig
)
(
fill-pointer
copy
)))))
nil
t
t
t
)
(
deftest
copy-array.3
(
let*
((
orig
(
vector
1
2
3
))
(
copy
(
copy-array
orig
)))
(
typep
copy
'simple-array
))
t
)
(
deftest
copy-array.4
(
let
((
orig
(
make-array
21
:adjustable
t
:fill-pointer
0
)))
(
dotimes
(
n
42
)
(
vector-push-extend
n
orig
))
(
let
((
copy
(
copy-array
orig
:adjustable
nil
:fill-pointer
nil
)))
(
typep
copy
'simple-array
)))
t
)
(
deftest
array-index.1
(
typep
0
'array-index
)
t
)
...
...
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