Update copyright notices for 2013

[gnus] / lisp / md4.el

diff --git a/lisp/md4.el b/lisp/md4.el
index 9e37499..9b7bd83 100644 (file)
--- a/lisp/md4.el
+++ b/lisp/md4.el
@@ -1,28 +1,26 @@
 ;;; md4.el --- MD4 Message Digest Algorithm.
 
-;; Copyright (C) 2004 Free Software Foundation, Inc.
-;; Copyright (C) 2001 Taro Kawagishi
+;; Copyright (C) 2001, 2004, 2007-2013 Free Software Foundation, Inc.
+
 ;; Author: Taro Kawagishi <tarok@transpulse.org>
 ;; Keywords: MD4
 ;; Version: 1.00
 ;; Created: February 2001
 
-;; This file is part of FLIM (Faithful Library about Internet Message).
+;; This file is part of GNU Emacs.
 
-;; This program is free software; you can redistribute it and/or modify
+;; GNU Emacs is free software: you can redistribute it and/or modify
 ;; it under the terms of the GNU General Public License as published by
-;; the Free Software Foundation; either version 2, or (at your option)
-;; any later version.
-;;
-;; This program is distributed in the hope that it will be useful,
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 ;; GNU General Public License for more details.
-;;
+
 ;; You should have received a copy of the GNU General Public License
-;; along with this program; see the file COPYING.  If not, write to the
-;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
-;; Boston, MA 02110-1301, USA.
+;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
 
 ;;; Code:
 
@@ -30,11 +28,12 @@
 ;;; MD4 hash calculation
 
 (defvar md4-buffer (make-vector 4 '(0 . 0))
-  "work buffer of four 32-bit integers")
+  "Work buffer of four 32-bit integers.")
 
 (defun md4 (in n)
-  "Returns the MD4 hash string of 16 bytes long for a string IN of N
-bytes long.  N is required to handle strings containing character 0."
+  "Return the MD4 hash for a string IN of length N bytes.
+The returned hash is 16 bytes long.  N is required to handle
+strings containing the character 0."
   (let (m
        (b (cons 0 (* n 8)))
        (i 0)
@@ -88,11 +87,10 @@ bytes long.  N is required to handle strings containing character 0."
 (defsubst md4-H (x y z) (logxor x y z))
 
 (defmacro md4-make-step (name func)
-  (`
-   (defun (, name) (a b c d xk s ac)
+  `(defun ,name (a b c d xk s ac)
      (let*
-         ((h1 (+ (car a) ((, func) (car b) (car c) (car d)) (car xk) (car ac)))
-          (l1 (+ (cdr a) ((, func) (cdr b) (cdr c) (cdr d)) (cdr xk) (cdr ac)))
+         ((h1 (+ (car a) (,func (car b) (car c) (car d)) (car xk) (car ac)))
+          (l1 (+ (cdr a) (,func (cdr b) (cdr c) (cdr d)) (cdr xk) (cdr ac)))
           (h2 (logand 65535 (+ h1 (lsh l1 -16))))
           (l2 (logand 65535 l1))
          ;; cyclic shift of 32 bits integer
@@ -102,7 +100,7 @@ bytes long.  N is required to handle strings containing character 0."
           (l3 (logand 65535 (if (> s 15)
                                 (+ (lsh l2 (- s 32)) (lsh h2 (- s 16)))
                               (+ (lsh l2 s) (lsh h2 (- s 16)))))))
-       (cons h3 l3)))))
+       (cons h3 l3))))
 
 (md4-make-step md4-round1 md4-F)
 (md4-make-step md4-round2 md4-G)
@@ -118,8 +116,9 @@ bytes long.  N is required to handle strings containing character 0."
   (cons (logand (car x) (car y)) (logand (cdr x) (cdr y))))
 
 (defun md4-64 (m)
-  "Calculate md4 of 64 bytes chunk M which is represented as 16 pairs of
-32 bits integers.  The resulting md4 value is placed in md4-buffer."
+  "Calculate MD4 hash of M.
+M is a 64-bytes chunk, represented as 16 pairs of 32-bit integers.
+The resulting MD4 value is placed in `md4-buffer'."
   (let ((a (aref md4-buffer 0))
        (b (aref md4-buffer 1))
        (c (aref md4-buffer 2))
@@ -202,8 +201,9 @@ bytes long.  N is required to handle strings containing character 0."
     str))
 
 (defun md4-pack-int32 (int32)
-  "Pack 32 bits integer in a 4 bytes string as little endian.  A 32 bits
-integer is represented as a pair of two 16 bits integers (cons high low)."
+  "Pack 32 bits integer in a 4 bytes string as little endian.
+A 32 bits integer is represented as a pair of two 16 bits
+integers (cons high low)."
   (let ((str (make-string 4 0))
        (h (car int32)) (l (cdr int32)))
     (aset str 0 (logand l 255))
@@ -225,5 +225,4 @@ integer is represented as a pair of two 16 bits integers (cons high low)."
 
 (provide 'md4)
 
-;;; arch-tag: 99d706fe-089b-42ea-9507-67ae41091e6e
 ;;; md4.el ends here