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Fix setting a range of char-table slots in a singular case

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* src/chartab.c (char_table_set_range): Start the loop from the
first character of the block to which FROM belongs.  (Bug#23797)

* test/src/chartab-tests.el: New test file.
This commit is contained in:
Eli Zaretskii 2016-06-19 18:25:17 +03:00
parent 4e9014f025
commit ea5d141882
2 changed files with 52 additions and 1 deletions
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2
src/chartab.c
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@ -492,7 +492,7 @@ char_table_set_range (Lisp_Object table, int from, int to, Lisp_Object val)
int lim = CHARTAB_IDX (to, 0, 0); int lim = CHARTAB_IDX (to, 0, 0);
int i, c; int i, c;
for (i = CHARTAB_IDX (from, 0, 0), c = 0; i <= lim; for (i = CHARTAB_IDX (from, 0, 0), c = i * chartab_chars[0]; i <= lim;
i++, c += chartab_chars[0]) i++, c += chartab_chars[0])
{ {
if (c > to) if (c > to)

51
test/src/chartab-tests.el Normal file
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@ -0,0 +1,51 @@
;;; chartab-tests.el --- Tests for char-tab.c
;; Copyright (C) 2016 Free Software Foundation, Inc.
;; Author: Eli Zaretskii <eliz@gnu.org>
;; This program 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.
;; This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
;;; Code:
(require 'ert)
(defun chartab-set-and-test (rng)
(let ((tbl (make-char-table nil nil))
(from (car rng))
(to (cdr rng)))
(set-char-table-range tbl rng t)
(should (eq (aref tbl from) t))
(should (eq (aref tbl to) t))
(should (eq (aref tbl (/ (+ from to) 2)) t))
(when (< to (max-char))
(should-not (eq (aref tbl (1+ to)) t)))
(when (> from 0)
(should-not (eq (aref tbl (1- from)) t)))))
(ert-deftest chartab-test-range-setting ()
(mapc (lambda (elt)
(chartab-set-and-test elt))
'((0 . 127)
(128 . 256)
(#x1000 . #x1fff)
(#x1001 . #x2000)
(#x10000 . #x20000)
(#x10001 . #x1ffff)
(#x20000 . #x30000)
(#xe0e00 . #xe0ef6)
)))
(provide 'chartab-tests)
;;; chartab-tests.el ends here