(archive-arc-summarize, archive-lzh-summarize): Convert csize to integer when

computing offsets within the compressed archive file.

2 files changed, 17 insertions, 3 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 147e449c351..1f7f52b637b 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,9 @@
+2006-05-16  Eli Zaretskii  <eliz@gnu.org>
+
+        * arc-mode.el (archive-arc-summarize, archive-lzh-summarize):
+        Convert csize to integer when computing offsets within the
+        compressed archive file.
+
 2006-05-16  Kim F. Storm  <storm@cua.dk>
 
         * subr.el (add-to-history): Add KEEP-ALL arg and align functionality
diff --git a/lisp/arc-mode.el b/lisp/arc-mode.el
index 96b41eca88d..0b016b981e2 100644
--- a/lisp/arc-mode.el
+++ b/lisp/arc-mode.el
@@ -1355,7 +1355,11 @@ This doesn't recover lost files, it just undoes changes in the buffer itself."
                            visual)
               files (cons (vector efnname ifnname fiddle nil (1- p))
                           files)
-              p (+ p 29 csize))))
+              ;; p needs to stay an integer, since we use it in char-after
+              ;; above.  Passing through `round' limits the compressed size
+              ;; to most-positive-fixnum, but if the compressed size exceeds
+              ;; that, we cannot visit the archive anyway.
+              p (+ p 29 (round csize)))))
     (goto-char (point-min))
     (let ((dash (concat "- --------  -----------  --------  "
                         (make-string maxlen ?-)
@@ -1497,9 +1501,13 @@ This doesn't recover lost files, it just undoes changes in the buffer itself."
               files (cons (vector prname ifnname fiddle mode (1- p))
                           files))
         (cond ((= hdrlvl 1)
-               (setq p (+ p hsize 2 csize)))
+               ;; p needs to stay an integer, since we use it in goto-char
+               ;; above.  Passing through `round' limits the compressed size
+               ;; to most-positive-fixnum, but if the compressed size exceeds
+               ;; that, we cannot visit the archive anyway.
+               (setq p (+ p hsize 2 (round csize))))
               ((or (= hdrlvl 2) (= hdrlvl 0))
-               (setq p (+ p thsize 2 csize))))
+               (setq p (+ p thsize 2 (round csize)))))
         ))
     (goto-char (point-min))
     (set-buffer-multibyte default-enable-multibyte-characters)