From: Stefan Monnier <monnier@iro.umontreal.ca>
Subject: Suspicious code in gnus-read-descriptions-file
Date: Tue, 22 Mar 2005 13:51:59 -0500 [thread overview]
Message-ID: <jwvzmwvo6sb.fsf-monnier+emacs@gnu.org> (raw)
The code below looks very odd:
(save-excursion
(save-restriction
(set-buffer nntp-server-buffer)
(goto-char (point-min))
(when (or (search-forward "\n.\n" nil t)
(goto-char (point-max)))
(beginning-of-line)
(narrow-to-region (point-min) (point)))
doing a set-buffer between the save-restriction and the narrow-to-region
seems like a bug. How 'bout the patch below? Which turns the set-buffer
into a with-current-buffer and moves it to before the save-excursion.
Maybe the save-excursion could be dropped altogether?
Stefan
--- gnus-start.el 22 mar 2005 13:45:50 -0500 1.35
+++ gnus-start.el 22 mar 2005 13:42:26 -0500
@@ -582,8 +582,7 @@
(defun gnus-subscribe-hierarchically (newgroup)
"Subscribe new NEWGROUP and insert it in hierarchical newsgroup order."
;; Basic ideas by mike-w@cs.aukuni.ac.nz (Mike Williams)
- (save-excursion
- (set-buffer (nnheader-find-file-noselect gnus-current-startup-file))
+ (with-current-buffer (nnheader-find-file-noselect gnus-current-startup-file)
(prog1
(let ((groupkey newgroup) before)
(while (and (not before) groupkey)
@@ -841,8 +840,7 @@
;; it's not needed).
;; (set-window-point (get-buffer-window (current-buffer)) (point-max))
(bury-buffer gnus-dribble-buffer)
- (save-excursion
- (set-buffer gnus-group-buffer)
+ (with-current-buffer gnus-group-buffer
(gnus-group-set-mode-line))
(set-buffer obuf))))
@@ -853,10 +851,9 @@
(defun gnus-dribble-read-file ()
"Read the dribble file from disk."
(let ((dribble-file (gnus-dribble-file-name)))
- (save-excursion
- (set-buffer (setq gnus-dribble-buffer
+ (with-current-buffer (setq gnus-dribble-buffer
(gnus-get-buffer-create
- (file-name-nondirectory dribble-file))))
+ (file-name-nondirectory dribble-file)))
(erase-buffer)
(setq buffer-file-name dribble-file)
(auto-save-mode t)
@@ -895,17 +892,15 @@
(defun gnus-dribble-eval-file ()
(when gnus-dribble-eval-file
(setq gnus-dribble-eval-file nil)
- (save-excursion
(let ((gnus-dribble-ignore t))
- (set-buffer gnus-dribble-buffer)
+ (with-current-buffer gnus-dribble-buffer
(eval-buffer (current-buffer))))))
(defun gnus-dribble-delete-file ()
(when (file-exists-p (gnus-dribble-file-name))
(delete-file (gnus-dribble-file-name)))
(when gnus-dribble-buffer
- (save-excursion
- (set-buffer gnus-dribble-buffer)
+ (with-current-buffer gnus-dribble-buffer
(let ((auto (make-auto-save-file-name)))
(when (file-exists-p auto)
(delete-file auto))
@@ -915,14 +910,12 @@
(defun gnus-dribble-save ()
(when (and gnus-dribble-buffer
(buffer-name gnus-dribble-buffer))
- (save-excursion
- (set-buffer gnus-dribble-buffer)
+ (with-current-buffer gnus-dribble-buffer
(save-buffer))))
(defun gnus-dribble-clear ()
(when (gnus-buffer-exists-p gnus-dribble-buffer)
- (save-excursion
- (set-buffer gnus-dribble-buffer)
+ (with-current-buffer gnus-dribble-buffer
(erase-buffer)
(set-buffer-modified-p nil)
(setq buffer-saved-size (buffer-size)))))
@@ -1276,8 +1269,7 @@
(when (gnus-active group)
(gnus-group-change-level
group gnus-level-default-subscribed gnus-level-killed)))
- (save-excursion
- (set-buffer gnus-group-buffer)
+ (with-current-buffer gnus-group-buffer
;; Don't error if the group already exists. This happens when a
;; first-time user types 'F'. -- didier
(gnus-group-make-help-group t))
@@ -1820,8 +1812,7 @@
(defun gnus-parse-active ()
"Parse active info in the nntp server buffer."
- (save-excursion
- (set-buffer nntp-server-buffer)
+ (with-current-buffer nntp-server-buffer
(goto-char (point-min))
;; Parse the result we got from `gnus-request-group'.
(when (looking-at "[0-9]+ [0-9]+ \\([0-9]+\\) [0-9]+")
@@ -1976,8 +1967,7 @@
(list "archive")))))
method)
(setq gnus-have-read-active-file nil)
- (save-excursion
- (set-buffer nntp-server-buffer)
+ (with-current-buffer nntp-server-buffer
(while (setq method (pop methods))
;; Only do each method once, in case the methods appear more
;; than once in this list.
@@ -2037,8 +2027,7 @@
(defun gnus-read-active-file-2 (groups method)
"Read an active file for GROUPS in METHOD using `gnus-retrieve-groups'."
(when groups
- (save-excursion
- (set-buffer nntp-server-buffer)
+ (with-current-buffer nntp-server-buffer
(gnus-check-server method)
(let ((list-type (gnus-retrieve-groups groups method)))
(cond ((not list-type)
@@ -2225,9 +2214,8 @@
;; can find there for changing the data already read -
;; i. e., reading the .newsrc file will not trash the data
;; already read (except for read articles).
- (save-excursion
(gnus-message 5 "Reading %s..." newsrc-file)
- (set-buffer (nnheader-find-file-noselect newsrc-file))
+ (with-current-buffer (nnheader-find-file-noselect newsrc-file)
(buffer-disable-undo)
(gnus-newsrc-to-gnus-format)
(kill-buffer (current-buffer))
@@ -2713,8 +2701,7 @@
(not force)
(or (not gnus-dribble-buffer)
(not (buffer-name gnus-dribble-buffer))
- (zerop (save-excursion
- (set-buffer gnus-dribble-buffer)
+ (zerop (with-current-buffer gnus-dribble-buffer
(buffer-size)))))
(gnus-message 4 "(No changes need to be saved)")
(gnus-run-hooks 'gnus-save-newsrc-hook)
@@ -2848,8 +2835,7 @@
(defun gnus-gnus-to-newsrc-format ()
;; Generate and save the .newsrc file.
- (save-excursion
- (set-buffer (create-file-buffer gnus-current-startup-file))
+ (with-current-buffer (create-file-buffer gnus-current-startup-file)
(let ((newsrc (cdr gnus-newsrc-alist))
(standard-output (current-buffer))
info ranges range method)
@@ -2915,8 +2901,7 @@
(gnus-run-hooks 'gnus-slave-mode-hook))
(defun gnus-slave-save-newsrc ()
- (save-excursion
- (set-buffer gnus-dribble-buffer)
+ (with-current-buffer gnus-dribble-buffer
(let ((slave-name
(mm-make-temp-file (concat gnus-current-startup-file "-slave-")))
(modes (ignore-errors
@@ -2940,8 +2925,7 @@
(if (not slave-files)
() ; There are no slave files to read.
(gnus-message 7 "Reading slave newsrcs...")
- (save-excursion
- (set-buffer (gnus-get-buffer-create " *gnus slave*"))
+ (with-current-buffer (gnus-get-buffer-create " *gnus slave*")
(setq slave-files
(sort (mapcar (lambda (file)
(list (nth 5 (file-attributes file)) file))
@@ -3008,9 +2992,9 @@
(gnus-message 1 "Couldn't read newsgroups descriptions")
nil)
(t
+ (with-current-buffer nntp-server-buffer
(save-excursion
(save-restriction
- (set-buffer nntp-server-buffer)
(goto-char (point-min))
(when (or (search-forward "\n.\n" nil t)
(goto-char (point-max)))
@@ -3053,15 +3037,14 @@
(when (and str charset (featurep 'mule))
(setq str (mm-decode-coding-string str charset)))
(set group str)))
- (forward-line 1))))
+ (forward-line 1)))))
(gnus-message 5 "Reading descriptions file...done")
t))))
(defun gnus-group-get-description (group)
"Get the description of a group by sending XGTITLE to the server."
(when (gnus-request-group-description group)
- (save-excursion
- (set-buffer nntp-server-buffer)
+ (with-current-buffer nntp-server-buffer
(goto-char (point-min))
(when (looking-at "[^ \t]+[ \t]+\\(.*\\)")
(match-string 1)))))
next reply other threads:[~2005-03-22 18:51 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-22 18:51 Stefan Monnier [this message]
2005-03-22 21:53 ` Suspicious code in gnus-read-descriptions-file Simon Josefsson
2005-03-22 22:28 ` David Kastrup
2005-03-22 23:17 ` Jesper Harder
2005-03-23 12:53 ` Stefan
2005-03-24 14:07 ` Jesper Harder
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