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[Emacs-diffs] emacs-26 a4ad7be: Fix off-by-one-link error in image--set-
From: |
Basil L. Contovounesios |
Subject: |
[Emacs-diffs] emacs-26 a4ad7be: Fix off-by-one-link error in image--set-property |
Date: |
Thu, 18 Apr 2019 11:10:44 -0400 (EDT) |
branch: emacs-26
commit a4ad7bed187493c1c230f223b52c71f5c34f7c89
Author: Basil L. Contovounesios <address@hidden>
Commit: Basil L. Contovounesios <address@hidden>
Fix off-by-one-link error in image--set-property
* lisp/image.el (image--set-property): Ensure new value is set even
in the unlikely case that the plist is empty. Fix off-by-one-link
error when deleting a property. (bug#35285)
* test/lisp/image-tests.el: New file.
(image--set-property): New test.
---
lisp/image.el | 4 ++--
test/lisp/image-tests.el | 45 +++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 47 insertions(+), 2 deletions(-)
diff --git a/lisp/image.el b/lisp/image.el
index 9d2045d..585e6e1 100644
--- a/lisp/image.el
+++ b/lisp/image.el
@@ -452,10 +452,10 @@ Internal use only."
;; plist. Decouple plist entries where the key matches
;; the property.
(if (eq (cadr image) property)
- (setcdr image (cddr image))
+ (setcdr image (cdddr image))
(setq image (cddr image))))
;; Just enter the new value.
- (plist-put (cdr image) property value))
+ (setcdr image (plist-put (cdr image) property value)))
value)
(defun image-property (image property)
diff --git a/test/lisp/image-tests.el b/test/lisp/image-tests.el
new file mode 100644
index 0000000..89b926e
--- /dev/null
+++ b/test/lisp/image-tests.el
@@ -0,0 +1,45 @@
+;;; image-tests.el --- tests for image.el -*- lexical-binding: t -*-
+
+;; Copyright (C) 2019 Free Software Foundation, Inc.
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; GNU Emacs 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 General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
+
+;;; Code:
+
+(require 'ert)
+(require 'image)
+
+(ert-deftest image--set-property ()
+ "Test `image--set-property' behavior."
+ (let ((image (list 'image)))
+ ;; Add properties.
+ (setf (image-property image :scale) 1)
+ (should (equal image '(image :scale 1)))
+ (setf (image-property image :width) 8)
+ (should (equal image '(image :scale 1 :width 8)))
+ (setf (image-property image :height) 16)
+ (should (equal image '(image :scale 1 :width 8 :height 16)))
+ ;; Delete properties.
+ (setf (image-property image :type) nil)
+ (should (equal image '(image :scale 1 :width 8 :height 16)))
+ (setf (image-property image :scale) nil)
+ (should (equal image '(image :width 8 :height 16)))
+ (setf (image-property image :height) nil)
+ (should (equal image '(image :width 8)))
+ (setf (image-property image :width) nil)
+ (should (equal image '(image)))))
+
+;;; image-tests.el ends here
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