;;;; Programmer: Kevin M. Rosenberg
;;;; Date Started: Apr 2000
;;;;
-;;;; $Id: strings.lisp,v 1.47 2003/07/09 19:19:19 kevin Exp $
+;;;; $Id: strings.lisp,v 1.48 2003/07/16 16:01:37 kevin Exp $
;;;;
;;;; This file, part of KMRCL, is Copyright (c) 2002 by Kevin M. Rosenberg
;;;;
(declare (type (integer 0 15) n))
(schar +hex-chars+ n))
-(defconstant +char-code-0+ (char-code #\0))
+(defconstant +char-code-lower-a+ (char-code #\a))
(defconstant +char-code-upper-a+ (char-code #\A))
-(declaim (type fixnum +char-code-0+ +char-code-upper-a+))
+(defconstant +char-code-0+ (char-code #\0))
+(declaim (type fixnum +char-code-0+ +char-code-upper-a+
+ +char-code-0))
(defun charhex (ch)
"convert hex character to decimal"
(setf (schar str dpos) ch)))))
-(defconstant +char-code-a+ (char-code #\a))
-(defun random-string (&optional (len 10))
+(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))
"Returns a random lower-case string."
(declare (optimize (speed 3)))
- (let ((s (make-string len)))
+ (let ((s (make-string length)))
(declare (simple-string s))
- (dotimes (i len s)
- (setf (schar s i)
- (code-char (+ +char-code-a+ (random 26)))))))
+ (dotimes (i length s)
+ (setf (schar s i) (random-char set)))))
(defun first-char (s)
str)))
+(defun string-strip-ending (str endings)
+ (if (stringp endings)
+ (setq endings (list endings)))
+ (let ((len (length str)))
+ (dolist (ending endings str)
+ (when (and (>= len (length ending))
+ (string-equal ending
+ (subseq str (- len
+ (length ending)))))
+ (return-from string-strip-ending
+ (subseq str 0 (- len (length ending))))))))
+