-;;; @ Emacs 19.31 emulation
-;;;
-
-(defun-maybe buffer-live-p (object)
- "Return non-nil if OBJECT is a buffer which has not been killed.
-Value is nil if OBJECT is not a buffer or if it has been killed.
-\[Emacs 19.31 emulating function]"
- (and object
- (get-buffer object)
- (buffer-name (get-buffer object))))
-
-;; This macro was imported Emacs 19.33.
-(defmacro-maybe save-selected-window (&rest body)
- "Execute BODY, then select the window that was selected before BODY.
-\[Emacs 19.31 emulating function]"
- (list 'let
- '((save-selected-window-window (selected-window)))
- (list 'unwind-protect
- (cons 'progn body)
- (list 'select-window 'save-selected-window-window))))
-
-
-;;; @ Emacs 20.1 emulation
-;;;
-
-;; This macro was imported Emacs 20.2.
-(defmacro-maybe when (cond &rest body)
- "(when COND BODY...): if COND yields non-nil, do BODY, else return nil."
- (list 'if cond (cons 'progn body)))
-
-(defmacro-maybe save-current-buffer (&rest body)
- "Save the current buffer; execute BODY; restore the current buffer.
-Executes BODY just like `progn'."
- (` (let ((orig-buffer (current-buffer)))
- (unwind-protect
- (progn (,@ body))
- (set-buffer orig-buffer)))))
-
-;; This macro was imported Emacs 20.2.
-(defmacro-maybe with-current-buffer (buffer &rest body)
- "Execute the forms in BODY with BUFFER as the current buffer.
-The value returned is the value of the last form in BODY.
-See also `with-temp-buffer'."
- (` (save-current-buffer
- (set-buffer (, buffer))
- (,@ body))))
-
-;; This macro was imported Emacs 20.2.
-(defmacro-maybe with-temp-file (file &rest forms)
- "Create a new buffer, evaluate FORMS there, and write the buffer to FILE.
-The value of the last form in FORMS is returned, like `progn'.
-See also `with-temp-buffer'."
- (let ((temp-file (make-symbol "temp-file"))
- (temp-buffer (make-symbol "temp-buffer")))
- `(let ((,temp-file ,file)
- (,temp-buffer
- (get-buffer-create (generate-new-buffer-name " *temp file*"))))
- (unwind-protect
- (prog1
- (with-current-buffer ,temp-buffer
- ,@forms)
- (with-current-buffer ,temp-buffer
- (widen)
- (write-region (point-min) (point-max) ,temp-file nil 0)))
- (and (buffer-name ,temp-buffer)
- (kill-buffer ,temp-buffer))))))
-
-;; This macro was imported Emacs 20.2.
-(defmacro-maybe with-temp-buffer (&rest forms)
- "Create a temporary buffer, and evaluate FORMS there like `progn'.
-See also `with-temp-file' and `with-output-to-string'."
- (let ((temp-buffer (make-symbol "temp-buffer")))
- (` (let (((, temp-buffer)
- (get-buffer-create (generate-new-buffer-name " *temp*"))))
- (unwind-protect
- (with-current-buffer (, temp-buffer)
- (,@ forms))
- (and (buffer-name (, temp-buffer))
- (kill-buffer (, temp-buffer))))))))
-
-;; This function was imported Emacs 20.3.
-(defun-maybe last (x &optional n)
- "Return the last link of the list X. Its car is the last element.
-If X is nil, return nil.
-If N is non-nil, return the Nth-to-last link of X.
-If N is bigger than the length of X, return X."
- (if n
- (let ((m 0) (p x))
- (while (consp p)
- (setq m (1+ m) p (cdr p)))
- (if (<= n 0) p
- (if (< n m) (nthcdr (- m n) x) x)))
- (while (cdr x)
- (setq x (cdr x)))
- x))
-
-;; This function was imported Emacs 20.3. (cl function)
-(defun-maybe butlast (x &optional n)
- "Returns a copy of LIST with the last N elements removed."
- (if (and n (<= n 0)) x
- (nbutlast (copy-sequence x) n)))
-
-;; This function was imported Emacs 20.3. (cl function)
-(defun-maybe nbutlast (x &optional n)
- "Modifies LIST to remove the last N elements."
- (let ((m (length x)))
- (or n (setq n 1))
- (and (< n m)
- (progn
- (if (> n 0) (setcdr (nthcdr (- (1- m) n) x) nil))
- x))))
-
-;; This function was imported from XEmacs 21.
-(defun-maybe split-string (string &optional pattern)
- "Return a list of substrings of STRING which are separated by PATTERN.
-If PATTERN is omitted, it defaults to \"[ \\f\\t\\n\\r\\v]+\"."
- (or pattern
- (setq pattern "[ \f\t\n\r\v]+"))
- ;; The FSF version of this function takes care not to cons in case
- ;; of infloop. Maybe we should synch?
- (let (parts (start 0))
- (while (string-match pattern string start)
- (setq parts (cons (substring string start (match-beginning 0)) parts)
- start (match-end 0)))
- (nreverse (cons (substring string start) parts))))
-
-
-;;; @ Emacs 20.3 emulation