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Allow scm_XXX_writable_elements on empty vectors, even if immutable

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* libguile/array-handle.c (initialize_vector_handle): Set both element
  pointers to NULL if the vector is empty.
* libguile/array-map.c (racp): Ignore immutability if destination is
  empty.
* test-suite/tests/sort.test: Check empty/mutable/immutable vectors with
  sort!.
* test-suite/tests/array-map.test: Check array-copy! with
  empty/immutable destination.
This commit is contained in:
Daniel Llorens 2017-09-15 12:36:57 +02:00
parent 1008ea3154
commit 4212f29655
4 changed files with 30 additions and 12 deletions
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6
libguile/array-handle.c
View file

@ -149,8 +149,10 @@ initialize_vector_handle (scm_t_array_handle *h, size_t len,
h->dim0.ubnd = (ssize_t) (len - 1U);
h->dim0.inc = 1;
h->element_type = element_type;
h->elements = elements;
h->writable_elements = mutable_p ? ((void *) elements) : NULL;
/* elements != writable_elements is used to check mutability later on.
Ignore it if the array is empty. */
h->elements = len==0 ? NULL : elements;
h->writable_elements = mutable_p ? ((void *) h->elements) : NULL;
h->vector = h->array;
h->vref = vref;
h->vset = vset;

2
libguile/array-map.c
View file

@ -263,7 +263,7 @@ racp (SCM src, SCM dst)
{
SCM const * el_s = h_s.elements;
SCM * el_d = h_d.writable_elements;
if (!el_d)
if (!el_d && n>0)
scm_wrong_type_arg_msg ("array-copy!", SCM_ARG2, dst, "mutable array");
for (; n-- > 0; i_s += inc_s, i_d += inc_d)
el_d[i_d] = el_s[i_s];

10
test-suite/tests/array-map.test
View file

@ -1,17 +1,17 @@
;;;; array-map.test --- test array mapping functions -*- scheme -*-
;;;;
;;;;
;;;; Copyright (C) 2004, 2005, 2006, 2009, 2013 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 library; if not, write to the Free Software
;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
@ -92,6 +92,10 @@
(array-copy! #2:0:2() c)
(array-equal? #2f64:0:2() c)))
(pass-if "empty/immutable vector"
(array-copy! #() (vector))
#t)
;; FIXME add empty, type 'b cases.
)

24
test-suite/tests/sort.test
View file

@ -74,7 +74,9 @@
(let* ((a (make-typed-array 'f64 0 99 3))
(v (make-shared-array a (lambda (i) (list (- 98 i) 0)) 99)))
(randomize-vector! v 99)
(sorted? (sort! v <) <)))
(sorted? (sort! v <) <))))
(with-test-prefix "stable-sort!"
(pass-if "stable-sort!"
(let ((v (randomize-vector! (make-vector 1000) 1000)))
@ -92,11 +94,6 @@
(randomize-vector! v 1000)
(sorted? (stable-sort! v <) <))))
;;;
;;; stable-sort
;;;
(with-test-prefix "stable-sort"
;; in guile 1.8.0 and 1.8.1 this test failed, an empty list provoked a
@ -108,3 +105,18 @@
;; behavior (integer underflow) leading to crashes.
(pass-if "empty vector"
(equal? '#() (stable-sort '#() <))))
(with-test-prefix "mutable/immutable arguments"
(with-test-prefix/c&e "immutable arguments"
(pass-if "sort! of empty vector"
(equal? #() (sort! (vector) <)))
(pass-if "sort of immutable vector"
(equal? #(0 1) (sort #(1 0) <))))
(pass-if-exception "sort! of mutable vector (compile)"
exception:wrong-type-arg
(compile '(sort! #(0) <) #:to 'value #:env (current-module))))