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;;; chess-ucb.el --- Engine interface to the Novag Universal Chess Board -*- lexical-binding: t; -*-
;; Copyright (C) 2002, 2014 Free Software Foundation, Inc.
;; Author: John Wiegley <johnw@gnu.org>
;; Maintainer: Mario Lang <mlang@delysid.org>
;; Keywords: games
;; This 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 3, or (at your option) any later
;; version.
;;
;; This 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 GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; jww (2002-04-25): This code has not been tested yet, since I don't
;; have access to a UCB. If anybody wants to donate one, or the money
;; for one ($300), I would be happy to correct this module. :)
;;; Code:
(require 'chess-common)
(defgroup chess-ucb nil
"Interface to the Novag Universal Chess Board."
:group 'chess-engine)
(defcustom chess-ucb-device "/dev/ttyS0"
"The serial device used to talk to the Novag UCB."
:type 'file
:group 'chess-ucb)
(defvar chess-ucb-handling-event nil)
(defvar chess-ucb-regexp-alist
(list
(cons "^M\\(..\\)\\(..\\)\\(/\\([QRNB]\\)\\)?\r\n"
(function
(lambda ()
(let ((move (concat (match-string 1)
"-"
(match-string 2)))
(promote (match-string 4)))
(if promote
(setq move (concat move "=" promote)))
(setq move (chess-engine-convert-algebraic move))
;; I don't use the usual engine logic for this, since
;; technically the UCB is just an input interface, not a
;; true engine.
(let ((chess-ucb-handling-event t))
(chess-game-move (chess-engine-game nil) move))))))))
(defun chess-ucb-handler (game event &rest args)
(unless chess-ucb-handling-event
(cond
((eq event 'initialize)
(when (file-exists-p chess-ucb-device)
;; jww (2002-04-25): cat is not bidirectional, so I need
;; something like "nc" that can talk with characters devices
;; at 9600 8N1.
(setq chess-engine-process
(start-process "*chess-ucb*" (current-buffer)
(executable-find "cat") chess-ucb-device))
t))
((memq event 'orient)
(chess-engine-send nil "N\r\n")
(chess-engine-set-position nil)
;; jww (2002-04-25): What happens if we're orienting to a
;; non-standard starting position? How do we inform the UCB of
;; the new position? If it doesn't test move legality, I
;; suppose we could just move all the pieces around one by
;; one...
(unless (eq chess-starting-position (chess-engine-position nil))
nil))
((eq event 'undo)
(dotimes (i (car args))
(chess-engine-send nil "T\r\n"))
;; prevent us from handling the `undo' event which this triggers
(let ((chess-engine-handling-event t))
(chess-game-undo game (car args))))
((eq event 'move)
(let ((move (chess-ply-to-algebraic (car args) t)))
(cond
((chess-ply-keyword (car args) :en-passant)
(setq move (concat move "ep")))
((chess-ply-keyword (car args) :castle)
(if (chess-pos-side-to-move (chess-ply-pos (car args)))
(setq move "e1-g1")
(setq move "e8-g8")))
((chess-ply-keyword (car args) :long-castle)
(if (chess-pos-side-to-move (chess-ply-pos (car args)))
(setq move "e1-c1")
(setq move "e8-c8"))))
(chess-engine-send nil (format "M%s\r\n" move)))))))
(provide 'chess-ucb)
;;; chess-ucb.el ends here
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