+(if (fboundp 'string-match-p)
+ (defalias 'org-string-match-p 'string-match-p)
+ (defun org-string-match-p (regexp string &optional start)
+ (save-match-data
+ (funcall 'string-match regexp string start))))
+
+(if (fboundp 'looking-at-p)
+ (defalias 'org-looking-at-p 'looking-at-p)
+ (defun org-looking-at-p (&rest args)
+ (save-match-data
+ (apply 'looking-at args))))
+
+; XEmacs does not have `looking-back'.
+(if (fboundp 'looking-back)
+ (defalias 'org-looking-back 'looking-back)
+ (defun org-looking-back (regexp &optional limit greedy)
+ "Return non-nil if text before point matches regular expression REGEXP.
+Like `looking-at' except matches before point, and is slower.
+LIMIT if non-nil speeds up the search by specifying a minimum
+starting position, to avoid checking matches that would start
+before LIMIT.
+
+If GREEDY is non-nil, extend the match backwards as far as
+possible, stopping when a single additional previous character
+cannot be part of a match for REGEXP. When the match is
+extended, its starting position is allowed to occur before
+LIMIT."
+ (let ((start (point))
+ (pos
+ (save-excursion
+ (and (re-search-backward (concat "\\(?:" regexp "\\)\\=") limit t)
+ (point)))))
+ (if (and greedy pos)
+ (save-restriction
+ (narrow-to-region (point-min) start)
+ (while (and (> pos (point-min))
+ (save-excursion
+ (goto-char pos)
+ (backward-char 1)
+ (looking-at (concat "\\(?:" regexp "\\)\\'"))))
+ (setq pos (1- pos)))
+ (save-excursion
+ (goto-char pos)
+ (looking-at (concat "\\(?:" regexp "\\)\\'")))))
+ (not (null pos)))))
+
+(defun org-floor* (x &optional y)
+ "Return a list of the floor of X and the fractional part of X.
+With two arguments, return floor and remainder of their quotient."
+ (let ((q (floor x y)))
+ (list q (- x (if y (* y q) q)))))
+