+(eval-when (:compile-toplevel :load-toplevel :execute)
+ (defvar +unambigous-charset+
+ "abcdefghjkmnpqrstuvwxyz123456789ABCDEFGHJKLMNPQSRTUVWXYZ")
+ (defconstant +unambigous-length+ (length +unambigous-charset+)))
+
+(defun random-char (&optional (set :lower-alpha))
+ (ecase set
+ (:lower-alpha
+ (code-char (+ +char-code-lower-a+ (random 26))))
+ (:lower-alphanumeric
+ (let ((n (random 36)))
+ (if (>= n 26)
+ (code-char (+ +char-code-0+ (- n 26)))
+ (code-char (+ +char-code-lower-a+ n)))))
+ (:upper-alpha
+ (code-char (+ +char-code-upper-a+ (random 26))))
+ (:unambigous
+ (schar +unambigous-charset+ (random +unambigous-length+)))
+ (:upper-lower-alpha
+ (let ((n (random 52)))
+ (if (>= n 26)
+ (code-char (+ +char-code-upper-a+ (- n 26)))
+ (code-char (+ +char-code-lower-a+ n)))))))
+
+
+(defun random-string (&key (length 10) (set :lower-alpha))