* riece-ndcc.el: Don't use calc.

[riece] / lisp / riece-ndcc.el

diff --git a/lisp/riece-ndcc.el b/lisp/riece-ndcc.el
index 8f390b7..8213089 100644 (file)
--- a/lisp/riece-ndcc.el
+++ b/lisp/riece-ndcc.el
@@ -1,4 +1,4 @@
-;;; riece-ndcc.el --- elisp native DCC add-on
+;;; riece-ndcc.el --- DCC file sending protocol support (written in elisp)
 ;; Copyright (C) 1998-2003 Daiki Ueno
 
 ;; Author: Daiki Ueno <ueno@unixuser.org>
@@ -18,16 +18,18 @@
 
 ;; You should have received a copy of the GNU General Public License
 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
-;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-;; Boston, MA 02111-1307, USA.
+;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
+
+;;; Commentary:
+
+;; NOTE: This is an add-on module for Riece.
 
 ;;; Code:
 
 (require 'riece-globals)
 (require 'riece-options)
 
-(require 'calc)
-
 (defgroup riece-ndcc nil
   "DCC written in elisp."
   :prefix "riece-"
@@ -44,33 +46,33 @@ Only used for sending files."
 (defvar riece-ndcc-request-user nil)
 (defvar riece-ndcc-request-size nil)
 
-(defvar riece-ndcc-enabled nil)
-
 (defconst riece-ndcc-description
-  "DCC file sending extension implemented with `make-network-process'")
+  "DCC file sending protocol support (written in elisp.)")
 
 (defun riece-ndcc-encode-address (address)
   (unless (string-match
           "^\\([0-9]+\\)\\.\\([0-9]+\\)\\.\\([0-9]+\\)\\.\\([0-9]+\\)$"
           address)
     (error "% is not an IP address" address))
-  (let ((calc-number-radix 10))
-    (calc-eval (format "%s * (2 ** 24) + %s * (2 **16) + %s * (2 ** 8) + %s"
-                      (match-string 1 address)
-                      (match-string 2 address)
-                      (match-string 3 address)
-                      (match-string 4 address)))))
+  (let ((string (number-to-string
+                (+ (* (float (string-to-number (match-string 1 address)))
+                      16777216)
+                   (* (float (string-to-number (match-string 2 address)))
+                      65536)
+                   (* (float (string-to-number (match-string 3 address)))
+                      256)
+                   (float (string-to-number (match-string 4 address)))))))
+    (if (string-match "\\." string)
+       (substring string 0 (match-beginning 0))
+      string)))
 
 (defun riece-ndcc-decode-address (address)
-  (format "%d.%d.%d.%d"
-         (floor (string-to-number
-                 (calc-eval (format "(%s / (2 ** 24)) %% 256" address))))
-         (floor (string-to-number
-                 (calc-eval (format "(%s / (2 ** 16)) %% 256" address))))
-         (floor (string-to-number
-                 (calc-eval (format "(%s / (2 ** 8)) %% 256" address))))
-         (floor (string-to-number
-                 (calc-eval (format "%s %% 256" address))))))
+  (let ((float-address (string-to-number (concat address ".0"))))
+    (format "%d.%d.%d.%d"
+           (floor (mod (/ float-address 16777216) 256))
+           (floor (mod (/ float-address 65536) 256))
+           (floor (mod (/ float-address 256) 256))
+           (floor (mod float-address 256)))))
 
 (defun riece-ndcc-server-sentinel (process status)
   (when (string-match "^open from " status)
@@ -192,7 +194,7 @@ Only used for sending files."
 
 (defun riece-handle-dcc-request (prefix target message)
   (let ((case-fold-search t))
-    (when (and riece-ndcc-enabled
+    (when (and (get 'riece-ndcc 'riece-addon-enabled)
               (string-match
                "SEND \\([^ ]+\\) \\([^ ]+\\) \\([^ ]+\\) \\([^ ]+\\)"
                message))
@@ -228,8 +230,13 @@ Only used for sending files."
 
 (defvar riece-dialogue-mode-map)
 (defun riece-ndcc-insinuate ()
+  (unless (fboundp 'make-network-process)
+    (error "This Emacs does not have make-network-process"))
   (add-hook 'riece-ctcp-dcc-request-hook 'riece-handle-dcc-request))
 
+(defun riece-ndcc-uninstall ()
+  (remove-hook 'riece-ctcp-dcc-request-hook 'riece-handle-dcc-request))
+
 (defun riece-ndcc-enable ()
   (define-key riece-dialogue-mode-map "\C-ds" 'riece-command-dcc-send)
   (define-key riece-dialogue-mode-map "\C-dr" 'riece-command-dcc-receive))