+(if (fboundp 'merge)
+ (defalias 'gnus-merge 'merge)
+ ;; Adapted from cl-seq.el
+ (defun gnus-merge (type list1 list2 pred)
+ "Destructively merge lists LIST1 and LIST2 to produce a new list.
+Argument TYPE is for compatibility and ignored.
+Ordering of the elements is preserved according to PRED, a `less-than'
+predicate on the elements."
+ (let ((res nil))
+ (while (and list1 list2)
+ (if (funcall pred (car list2) (car list1))
+ (push (pop list2) res)
+ (push (pop list1) res)))
+ (nconc (nreverse res) list1 list2))))
+
+(defvar xemacs-codename)
+(defvar sxemacs-codename)
+(defvar emacs-program-version)
+
+(defun gnus-emacs-version ()
+ "Stringified Emacs version."
+ (let* ((lst (if (listp gnus-user-agent)
+ gnus-user-agent
+ '(gnus emacs type)))
+ (system-v (cond ((memq 'config lst)
+ system-configuration)
+ ((memq 'type lst)
+ (symbol-name system-type))
+ (t nil)))
+ codename emacsname)
+ (cond ((featurep 'sxemacs)
+ (setq emacsname "SXEmacs"
+ codename sxemacs-codename))
+ ((featurep 'xemacs)
+ (setq emacsname "XEmacs"
+ codename xemacs-codename))
+ (t
+ (setq emacsname "Emacs")))
+ (cond
+ ((not (memq 'emacs lst))
+ nil)
+ ((string-match "^\\(\\([.0-9]+\\)*\\)\\.[0-9]+$" emacs-version)
+ ;; Emacs:
+ (concat "Emacs/" (match-string 1 emacs-version)
+ (if system-v
+ (concat " (" system-v ")")
+ "")))
+ ((or (featurep 'sxemacs) (featurep 'xemacs))
+ ;; XEmacs or SXEmacs:
+ (concat emacsname "/" emacs-program-version
+ (let (plst)
+ (when (memq 'codename lst)
+ (push codename plst))
+ (when system-v
+ (push system-v plst))
+ (unless (featurep 'mule)
+ (push "no MULE" plst))
+ (when (> (length plst) 0)
+ (concat
+ " (" (mapconcat 'identity (reverse plst) ", ") ")")))))
+ (t emacs-version))))
+
+(defun gnus-rename-file (old-path new-path &optional trim)
+ "Rename OLD-PATH as NEW-PATH. If TRIM, recursively delete
+empty directories from OLD-PATH."
+ (when (file-exists-p old-path)
+ (let* ((old-dir (file-name-directory old-path))
+ (old-name (file-name-nondirectory old-path))
+ (new-dir (file-name-directory new-path))
+ (new-name (file-name-nondirectory new-path))
+ temp)
+ (gnus-make-directory new-dir)
+ (rename-file old-path new-path t)
+ (when trim
+ (while (progn (setq temp (directory-files old-dir))
+ (while (member (car temp) '("." ".."))
+ (setq temp (cdr temp)))
+ (= (length temp) 0))
+ (delete-directory old-dir)
+ (setq old-dir (file-name-as-directory
+ (file-truename
+ (concat old-dir "..")))))))))
+
+(defun gnus-set-file-modes (filename mode)
+ "Wrapper for set-file-modes."
+ (ignore-errors
+ (set-file-modes filename mode)))
+
+(if (fboundp 'set-process-query-on-exit-flag)
+ (defalias 'gnus-set-process-query-on-exit-flag
+ 'set-process-query-on-exit-flag)
+ (defalias 'gnus-set-process-query-on-exit-flag
+ 'process-kill-without-query))
+
+(if (fboundp 'with-local-quit)
+ (defalias 'gnus-with-local-quit 'with-local-quit)
+ (defmacro gnus-with-local-quit (&rest body)
+ "Execute BODY, allowing quits to terminate BODY but not escape further.
+When a quit terminates BODY, `gnus-with-local-quit' returns nil but
+requests another quit. That quit will be processed as soon as quitting
+is allowed once again. (Immediately, if `inhibit-quit' is nil.)"
+ ;;(declare (debug t) (indent 0))
+ `(condition-case nil
+ (let ((inhibit-quit nil))
+ ,@body)
+ (quit (setq quit-flag t)
+ ;; This call is to give a chance to handle quit-flag
+ ;; in case inhibit-quit is nil.
+ ;; Without this, it will not be handled until the next function
+ ;; call, and that might allow it to exit thru a condition-case
+ ;; that intends to handle the quit signal next time.
+ (eval '(ignore nil))))))
+
+(defalias 'gnus-read-shell-command
+ (if (fboundp 'read-shell-command) 'read-shell-command 'read-string))
+
+(defmacro gnus-put-display-table (range value display-table)
+ "Set the value for char RANGE to VALUE in DISPLAY-TABLE. "
+ (if (featurep 'xemacs)
+ (progn
+ `(if (fboundp 'put-display-table)
+ (put-display-table ,range ,value ,display-table)
+ (if (sequencep ,display-table)
+ (aset ,display-table ,range ,value)
+ (put-char-table ,range ,value ,display-table))))
+ `(aset ,display-table ,range ,value)))
+
+(defmacro gnus-get-display-table (character display-table)
+ "Find value for CHARACTER in DISPLAY-TABLE. "
+ (if (featurep 'xemacs)
+ `(if (fboundp 'get-display-table)
+ (get-display-table ,character ,display-table)
+ (if (sequencep ,display-table)
+ (aref ,display-table ,character)
+ (get-char-table ,character ,display-table)))
+ `(aref ,display-table ,character)))
+
+(provide 'gnus-util)
+