+(/debug "loading char.lisp!")
+
+;; These comparison functions heavily borrowed from SBCL/CMUCL (public domain).
+
+(defun char= (character &rest more-characters)
+ (dolist (c more-characters t)
+ (unless (eql c character) (return nil))))
+
+(defun char/= (character &rest more-characters)
+ (do* ((head character (car list))
+ (list more-characters (cdr list)))
+ ((null list) t)
+ (dolist (c list)
+ (when (eql head c) (return-from char/= nil)))))
+
+(defun char< (character &rest more-characters)
+ (do* ((c character (car list))
+ (list more-characters (cdr list)))
+ ((null list) t)
+ (unless (< (char-int c)
+ (char-int (car list)))
+ (return nil))))
+
+(defun char> (character &rest more-characters)
+ (do* ((c character (car list))
+ (list more-characters (cdr list)))
+ ((null list) t)
+ (unless (> (char-int c)
+ (char-int (car list)))
+ (return nil))))
+
+(defun char<= (character &rest more-characters)
+ (do* ((c character (car list))
+ (list more-characters (cdr list)))
+ ((null list) t)
+ (unless (<= (char-int c)
+ (char-int (car list)))
+ (return nil))))
+
+(defun char>= (character &rest more-characters)
+ (do* ((c character (car list))
+ (list more-characters (cdr list)))
+ ((null list) t)
+ (unless (>= (char-int c)
+ (char-int (car list)))
+ (return nil))))
+
+(defun equal-char-code (character)
+ (char-code (char-upcase character)))
+
+(defun two-arg-char-equal (c1 c2)
+ (= (equal-char-code c1) (equal-char-code c2)))
+
+(defun char-equal (character &rest more-characters)
+ (do ((clist more-characters (cdr clist)))
+ ((null clist) t)
+ (unless (two-arg-char-equal (car clist) character)
+ (return nil))))
+
+(defun char-not-equal (character &rest more-characters)
+ (do* ((head character (car list))
+ (list more-characters (cdr list)))
+ ((null list) t)
+ (unless (do* ((l list (cdr l)))
+ ((null l) t)
+ (when (two-arg-char-equal head (car l))
+ (return nil)))
+ (return nil))))
+
+(defun two-arg-char-lessp (c1 c2)
+ (< (equal-char-code c1) (equal-char-code c2)))
+
+(defun char-lessp (character &rest more-characters)
+ (do* ((c character (car list))
+ (list more-characters (cdr list)))
+ ((null list) t)
+ (unless (two-arg-char-lessp c (car list))
+ (return nil))))
+
+(defun two-arg-char-greaterp (c1 c2)
+ (> (equal-char-code c1) (equal-char-code c2)))
+
+(defun char-greaterp (character &rest more-characters)
+ (do* ((c character (car list))
+ (list more-characters (cdr list)))
+ ((null list) t)
+ (unless (two-arg-char-greaterp c (car list))
+ (return nil))))
+
+(defun two-arg-char-not-greaterp (c1 c2)
+ (<= (equal-char-code c1) (equal-char-code c2)))
+
+(defun char-not-greaterp (character &rest more-characters)
+ (do* ((c character (car list))
+ (list more-characters (cdr list)))
+ ((null list) t)
+ (unless (two-arg-char-not-greaterp c (car list))
+ (return nil))))
+
+(defun two-arg-char-not-lessp (c1 c2)
+ (>= (equal-char-code c1) (equal-char-code c2)))
+
+(defun char-not-lessp (character &rest more-characters)
+ (do* ((c character (car list))
+ (list more-characters (cdr list)))
+ ((null list) t)
+ (unless (two-arg-char-not-lessp c (car list))
+ (return nil))))
+