From 8efe8f0f61c5f097670abba09a026a944e0ad9ca Mon Sep 17 00:00:00 2001
From: teranisi <teranisi>
Date: Tue, 24 Oct 2000 00:29:35 +0000
Subject: [PATCH] * elmo-imap4.el (elmo-imap4-session-select-mailbox): Added
 argument `no-error'. Added docstring. Return non-nil if
 selecting folder succeeded. (elmo-imap4-folder-exists-p):
 Call with argument 'no-error.

---
 elmo/ChangeLog     |    8 ++++++++
 elmo/elmo-imap4.el |   23 ++++++++++++++++-------
 2 files changed, 24 insertions(+), 7 deletions(-)

diff --git a/elmo/ChangeLog b/elmo/ChangeLog
index d72e72a..6002533 100644
--- a/elmo/ChangeLog
+++ b/elmo/ChangeLog
@@ -1,3 +1,11 @@
+2000-10-24  Yuuichi Teranishi  <teranisi@gohome.org>
+
+	* elmo-imap4.el (elmo-imap4-session-select-mailbox): Added argument
+	`no-error'.
+	Added docstring.
+	Return non-nil if selecting folder succeeded.
+	(elmo-imap4-folder-exists-p): Call with argument 'no-error.
+
 2000-10-23  Yuuichi Teranishi  <teranisi@gohome.org>
 
 	* elmo-maildir.el (elmo-maildir-get-filename): Fixed problem when
diff --git a/elmo/elmo-imap4.el b/elmo/elmo-imap4.el
index 434671a..93cdf34 100644
--- a/elmo/elmo-imap4.el
+++ b/elmo/elmo-imap4.el
@@ -576,7 +576,7 @@ BUFFER must be a single-byte buffer."
       (elmo-imap4-session-select-mailbox
        session
        (elmo-imap4-spec-mailbox spec)
-       'force))))
+       'force 'no-error))))
 
 (defun elmo-imap4-folder-creatable-p (spec)
   t)
@@ -669,12 +669,19 @@ BUFFER must be a single-byte buffer."
 		   'force)	      
 		(elmo-imap4-session-check session)))))))
   
-(defun elmo-imap4-session-select-mailbox (session mailbox &optional force)
+(defun elmo-imap4-session-select-mailbox (session mailbox
+						  &optional force no-error)
+  "Select MAILBOX in SESSION.
+If optional argument FORCE is non-nil, select mailbox even if current mailbox
+is same as MAILBOX.
+If second optional argument NO-ERROR is non-nil, don't cause an error when
+selecting folder was failed.
+Returns t if selecting folder succeed. Otherwise, nil is returned."
   (when (or force
 	    (not (string=
 		  (elmo-imap4-session-current-mailbox-internal session)
 		  mailbox)))
-    (let (response)
+    (let (response result)
       (unwind-protect
 	  (setq response
 		(elmo-imap4-read-response
@@ -684,16 +691,18 @@ BUFFER must be a single-byte buffer."
 		  (list
 		   "select "
 		   (elmo-imap4-mailbox mailbox)))))
-	(if (elmo-imap4-response-ok-p response)
+	(if (setq result (elmo-imap4-response-ok-p response))
 	    (progn
 	      (elmo-imap4-session-set-current-mailbox-internal session mailbox)
 	      (elmo-imap4-session-set-read-only-internal
 	       session
 	       (nth 1 (assq 'read-only (assq 'ok response)))))
 	  (elmo-imap4-session-set-current-mailbox-internal session nil)
-	  (error (or
-		  (elmo-imap4-response-error-text response)
-		  (format "Select %s failed" mailbox))))))))
+	  (unless no-error
+	    (error (or
+		    (elmo-imap4-response-error-text response)
+		    (format "Select %s failed" mailbox))))))
+      result)))
 
 (defun elmo-imap4-check-validity (spec validity-file)
   ;; Not used.
-- 
1.7.10.4