+;; All backends use this function, so I moved it to this file.
+
+(defun nnheader-init-server-buffer ()
+ (save-excursion
+ (setq nntp-server-buffer (get-buffer-create " *nntpd*"))
+ (set-buffer nntp-server-buffer)
+ (buffer-disable-undo (current-buffer))
+ (erase-buffer)
+ (kill-all-local-variables)
+ (setq case-fold-search t) ;Should ignore case.
+ t))
+
+(defun nnheader-set-init-variables (server defs)
+ (let ((s server)
+ val)
+ ;; First we set the server variables in the sequence required. We
+ ;; use the definitions from the `defs' list where that is
+ ;; possible.
+ (while s
+ (set (car (car s))
+ (if (setq val (assq (car (car s)) defs))
+ (nth 1 val)
+ (nth 1 (car s))))
+ (setq s (cdr s)))
+ ;; The we go through the defs list and set any variables that were
+ ;; not set in the first sweep.
+ (while defs
+ (if (not (assq (car (car defs)) server))
+ (set (car (car defs))
+ (if (and (symbolp (nth 1 (car defs)))
+ (not (boundp (nth 1 (car defs)))))
+ (nth 1 (car defs))
+ (eval (nth 1 (car defs))))))
+ (setq defs (cdr defs)))))
+
+(defun nnheader-save-variables (server)
+ (let (out)
+ (while server
+ (setq out (cons (list (car (car server))
+ (symbol-value (car (car server))))
+ out))
+ (setq server (cdr server)))
+ (nreverse out)))
+
+(defun nnheader-restore-variables (state)
+ (while state
+ (set (car (car state)) (nth 1 (car state)))
+ (setq state (cdr state))))
+
+;; Read the head of an article.
+(defun nnheader-insert-head (file)
+ (let ((beg 0)
+ (chop 1024))
+ (while (and (eq chop (nth 1 (nnheader-insert-file-contents-literally
+ file nil beg (setq beg (+ chop beg)))))
+ (prog1 (not (search-backward "\n\n" nil t))
+ (goto-char (point-max)))))))
+
+(defun nnheader-article-p ()
+ (goto-char (point-min))
+ (if (not (search-forward "\n\n" nil t))
+ nil
+ (narrow-to-region (point-min) (1- (point)))
+ (goto-char (point-min))
+ (while (looking-at "[A-Z][^ \t]+:.*\n\\([ \t].*\n\\)*\\|From .*\n")
+ (goto-char (match-end 0)))
+ (prog1
+ (eobp)
+ (widen))))
+
+;; Written by Erik Naggum <erik@naggum.no>.
+(defun nnheader-insert-file-contents-literally (filename &optional visit beg end replace)
+ "Like `insert-file-contents', q.v., but only reads in the file.
+A buffer may be modified in several ways after reading into the buffer due
+to advanced Emacs features, such as file-name-handlers, format decoding,
+find-file-hooks, etc.
+ This function ensures that none of these modifications will take place."
+ (let ( ; (file-name-handler-alist nil)
+ (format-alist nil)
+ (after-insert-file-functions nil)
+ (find-buffer-file-type-function
+ (if (fboundp 'find-buffer-file-type)
+ (symbol-function 'find-buffer-file-type)
+ nil)))
+ (unwind-protect
+ (progn
+ (fset 'find-buffer-file-type (lambda (filename) t))
+ (insert-file-contents filename visit beg end replace))
+ (if find-buffer-file-type-function
+ (fset 'find-buffer-file-type find-buffer-file-type-function)
+ (fmakunbound 'find-buffer-file-type)))))
+
+(defun nnheader-find-file-noselect (filename &optional nowarn rawfile)
+ "Read file FILENAME into a buffer and return the buffer.
+If a buffer exists visiting FILENAME, return that one, but
+verify that the file has not changed since visited or saved.
+The buffer is not selected, just returned to the caller."
+ (setq filename
+ (abbreviate-file-name
+ (expand-file-name filename)))
+ (if (file-directory-p filename)
+ (if find-file-run-dired
+ (dired-noselect filename)
+ (error "%s is a directory." filename))
+ (let* ((buf (get-file-buffer filename))
+ (truename (abbreviate-file-name (file-truename filename)))
+ (number (nthcdr 10 (file-attributes truename)))
+ ;; Find any buffer for a file which has same truename.
+ (other (and (not buf)
+ (if (fboundp 'find-buffer-visiting)
+ (find-buffer-visiting filename)
+ (get-file-buffer filename))))
+ error)
+ ;; Let user know if there is a buffer with the same truename.
+ (if other
+ (progn
+ (or nowarn
+ (string-equal filename (buffer-file-name other))
+ (message "%s and %s are the same file"
+ filename (buffer-file-name other)))
+ ;; Optionally also find that buffer.
+ (if (or (and (boundp 'find-file-existing-other-name)
+ find-file-existing-other-name)
+ find-file-visit-truename)
+ (setq buf other))))
+ (if buf
+ (or nowarn
+ (verify-visited-file-modtime buf)
+ (cond ((not (file-exists-p filename))
+ (error "File %s no longer exists!" filename))
+ ((yes-or-no-p
+ (if (string= (file-name-nondirectory filename)
+ (buffer-name buf))
+ (format
+ (if (buffer-modified-p buf)
+ "File %s changed on disk. Discard your edits? "
+ "File %s changed on disk. Reread from disk? ")
+ (file-name-nondirectory filename))
+ (format
+ (if (buffer-modified-p buf)
+ "File %s changed on disk. Discard your edits in %s? "
+ "File %s changed on disk. Reread from disk into %s? ")
+ (file-name-nondirectory filename)
+ (buffer-name buf))))
+ (save-excursion
+ (set-buffer buf)
+ (revert-buffer t t)))))
+ (save-excursion
+;;; The truename stuff makes this obsolete.
+;;; (let* ((link-name (car (file-attributes filename)))
+;;; (linked-buf (and (stringp link-name)
+;;; (get-file-buffer link-name))))
+;;; (if (bufferp linked-buf)
+;;; (message "Symbolic link to file in buffer %s"
+;;; (buffer-name linked-buf))))
+ (setq buf (create-file-buffer filename))
+ ;; (set-buffer-major-mode buf)
+ (set-buffer buf)
+ (erase-buffer)
+ (if rawfile
+ (condition-case ()
+ (nnheader-insert-file-contents-literally filename t)
+ (file-error
+ ;; Unconditionally set error
+ (setq error t)))
+ (condition-case ()
+ (insert-file-contents filename t)
+ (file-error
+ ;; Run find-file-not-found-hooks until one returns non-nil.
+ (or t ; (run-hook-with-args-until-success 'find-file-not-found-hooks)
+ ;; If they fail too, set error.
+ (setq error t)))))
+ ;; Find the file's truename, and maybe use that as visited name.
+ (setq buffer-file-truename truename)
+ (setq buffer-file-number number)
+ ;; On VMS, we may want to remember which directory in a search list
+ ;; the file was found in.
+ (and (eq system-type 'vax-vms)
+ (let (logical)
+ (if (string-match ":" (file-name-directory filename))
+ (setq logical (substring (file-name-directory filename)
+ 0 (match-beginning 0))))
+ (not (member logical find-file-not-true-dirname-list)))
+ (setq buffer-file-name buffer-file-truename))
+ (if find-file-visit-truename
+ (setq buffer-file-name
+ (setq filename
+ (expand-file-name buffer-file-truename))))
+ ;; Set buffer's default directory to that of the file.
+ (setq default-directory (file-name-directory filename))
+ ;; Turn off backup files for certain file names. Since
+ ;; this is a permanent local, the major mode won't eliminate it.
+ (and (not (funcall backup-enable-predicate buffer-file-name))
+ (progn
+ (make-local-variable 'backup-inhibited)
+ (setq backup-inhibited t)))
+ (if rawfile
+ nil
+ (after-find-file error (not nowarn)))))
+ buf)))
+
+(defun nnheader-insert-references (references message-id)
+ ;; Fold long references line to follow RFC1036.
+ (mail-position-on-field "References")
+ (let ((begin (gnus-point-at-bol))
+ (fill-column 78)
+ (fill-prefix "\t"))
+ (if references (insert references))
+ (if (and references message-id) (insert " "))
+ (if message-id (insert message-id))
+ ;; The region must end with a newline to fill the region
+ ;; without inserting extra newline.
+ (fill-region-as-paragraph begin (1+ (point)))))
+