code.delx.au - gnu-emacs-elpa/blob - chess-network.el

   1 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
   2 ;;
   3 ;; Play against an opponent over the network
   4 ;;
   5 ;; $Revision$
   6
   7 (require 'chess-engine)
   8 (require 'chess-fen)
   9 (require 'chess-algebraic)
  10
  11 (defvar chess-network-now-moving nil)
  12
  13 (defvar chess-network-regexp-alist
  14   (list (cons (concat "\\(Black\\|White\\):\\s-*"
  15                       chess-algebraic-regexp "\\s-+")
  16               'chess-network-perform-move)
  17         (cons "PASS"
  18               (function
  19                (lambda ()
  20                  (message "Your opponent has passed the move to you"))))
  21         (cons "CONNECT\\s-+\\(.*\\)"
  22               (function
  23                (lambda ()
  24                  ;; jww (2002-04-07): Set the appropriate Black or
  25                  ;; White tag at this point
  26                  (message "Your opponent, %s, has connected"
  27                           (match-string 1)))))
  28         (cons "SETBOARD\\s-+\\(.*\\)"
  29               (function
  30                (lambda ()
  31                  (let* ((position (chess-fen-to-pos (match-string 1)))
  32                         (ply (chess-ply-create position)))
  33                    (chess-game-set-plies (chess-engine-game nil)
  34                                          (list ply))))))))
  35
  36 (defun chess-network-perform-move ()
  37   (let ((position (chess-engine-position nil))
  38         (move (match-string 2)) ply)
  39     (when (string= (if (chess-pos-side-to-move position)
  40                        "White" "Black")
  41                    (match-string 1))
  42       (setq ply (chess-algebraic-to-ply position move))
  43       (unless ply
  44         (error "Could not convert engine move: %s" move))
  45       (let ((chess-network-now-moving t))
  46         (funcall chess-engine-response-handler 'move ply)))))
  47
  48 (defun chess-network-handler (event &rest args)
  49   "Initialize the network chess engine."
  50   (cond
  51    ((eq event 'initialize)
  52     (let ((which (read-char "cAre you the c)lient or s)erver? "))
  53           proc)
  54       (message "Starting network client/server...")
  55       (setq proc (if (eq which ?s)
  56                      (start-process "*chess-network*"
  57                                     (current-buffer) "/usr/bin/nc"
  58                                     "-l" "-p" (read-string "Port: "))
  59                    (open-network-stream "*chess-network*" (current-buffer)
  60                                         (read-string "Host: ")
  61                                         (read-string "Port: "))))
  62       (if (eq which ?s)
  63           (message "Now waiting for your opponent to connect...")
  64         (process-send-string proc (format "CONNECT %s\n" (user-full-name)))
  65         (message "You have connected; pass now or make your move."))
  66       proc))
  67
  68    ((eq event 'shutdown)
  69     (chess-engine-send nil "QUIT\n"))
  70
  71    ((eq event 'setup)
  72     (chess-engine-send nil (format "SETBOARD %s\n"
  73                                    (chess-pos-to-fen (car args)))))
  74
  75    ((eq event 'pass)
  76     (chess-engine-send nil "PASS\n"))
  77
  78    ((eq event 'move)
  79     (unless chess-network-now-moving
  80       (chess-engine-send
  81        nil (concat (if (chess-pos-side-to-move (chess-ply-pos (car args)))
  82                        "White:"
  83                      "Black:")
  84                    (chess-ply-to-algebraic (car args))
  85                    "\n"))))))
  86
  87 (provide 'chess-network)
  88
  89 ;;; chess-network.el ends here