From d5cdfe53478e24435f9e214cbce5be7163c9792d Mon Sep 17 00:00:00 2001
From: yamaoka <yamaoka>
Date: Thu, 19 Feb 2004 05:52:36 +0000
Subject: [PATCH] (wl-highlight-signature-search): Don't use
 re-search-backward for a long  word since it is possible to
 crash XEmacs because of a bug.

---
 wl/ChangeLog       |    6 ++++++
 wl/wl-highlight.el |   26 +++++++++++++++++---------
 2 files changed, 23 insertions(+), 9 deletions(-)

diff --git a/wl/ChangeLog b/wl/ChangeLog
index a0d86ce..d391256 100644
--- a/wl/ChangeLog
+++ b/wl/ChangeLog
@@ -1,3 +1,9 @@
+2004-02-19  Katsumi Yamaoka  <yamaoka@jpl.org>
+
+	* wl-highlight.el (wl-highlight-signature-search): Don't use
+	re-search-backward for a long word since it is possible to crash
+	XEmacs because of a bug.
+
 2004-02-15  Tetsurou Okazaki  <okazaki@be.to>
 
 	* wl-message.el (wl-message-buffer-prefetch-p): Change `defsubst' to `defun'.
diff --git a/wl/wl-highlight.el b/wl/wl-highlight.el
index f03fe3b..2796e8d 100644
--- a/wl/wl-highlight.el
+++ b/wl/wl-highlight.el
@@ -1078,17 +1078,25 @@ Returns start point of signature."
     (goto-char end)
     (or
      ;; look for legal signature separator (check at first for fasten)
-     (re-search-backward "\n-- \n" beg t)
+     (search-backward "\n-- \n" beg t)
 
      ;; look for dual separator
-     (save-excursion
-       (and
-	(re-search-backward "^[^A-Za-z0-9> \t\n]+ *$" beg t)
-	(> (- (match-end 0) (match-beginning 0)) 10);; "10" is a magic number.
-	(re-search-backward
-	 (concat "^"
-		 (regexp-quote (buffer-substring (match-beginning 0) (match-end 0)))
-		 "$") beg t)))
+     (let ((pt (point))
+	   separator)
+       (prog1
+	   (and (re-search-backward "^[^A-Za-z0-9> \t\n]+ *$" beg t)
+		;; `10' is a magic number.
+		(> (- (match-end 0) (match-beginning 0)) 10)
+		(setq separator (buffer-substring (match-beginning 0)
+						  (match-end 0)))
+		;; We should not use `re-search-backward' for a long word
+		;; since it is possible to crash XEmacs because of a bug.
+		(if (search-backward (concat "\n" separator "\n") beg t)
+		    (1+ (point))
+		  (and (search-backward (concat separator "\n") beg t)
+		       (bolp)
+		       (point))))
+	 (goto-char pt)))
 
      ;; look for user specified signature-separator
      (if (stringp wl-highlight-signature-separator)
-- 
1.7.10.4