;;;; Copyright 2002-2003 Kevin M. Rosenberg
;;;; Permission to use with BSD-style license included in the COPYING file
;;;;
-;;;; $Id: src.lisp,v 1.5 2003/01/04 08:33:13 kevin Exp $
+;;;; $Id: src.lisp,v 1.6 2003/01/04 13:43:27 kevin Exp $
(defpackage #:base64
(:use #:cl)
(let* ((string-length (length string))
(complete-group-count (truncate string-length 3))
(remainder (nth-value 1 (truncate string-length 3)))
- (padded-length (+ remainder
- (* 4 complete-group-count)))
+ (padded-length (* 4 (truncate (+ string-length 2) 3)))
(num-lines (if (plusp columns)
(truncate (+ padded-length (1- columns)) columns)
0))
(the fixnum
(logand #x3f
(the fixnum (ash svalue -6))))))
- (output-char pad))
+ (output-char pad))
(if (> chars 3)
(output-char
(schar encode-table
(the fixnum
(logand #x3f svalue))))
- (output-char pad))))
+ (output-char pad))))
(do ((igroup 0 (1+ igroup))
(isource 0 (+ isource 3)))
((= igroup complete-group-count)
- (case remainder
- (2
+ (cond
+ ((= remainder 2)
(output-group
(the fixnum
(+
(ash (char-code (the character
(char string (1+ isource)))) 8))))
3))
- (1
+ ((= remainder 1)
(output-group
(the fixnum
- (char-code (the character (char string isource))))
+ (ash (char-code (the character (char string isource))) 16))
2)))
result)
(declare (fixnum igroup isource))