blob: 66a4b994fc8ca4a973c7e258f8df4f3845d774bb (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;; Define handler functions that are common to the (relatively)
;; standard chess engine communication protocol:
;;
;; http://www.tim-mann.org/xboard/engine-intf.html
;;
;; $Revision$
(require 'chess-engine)
(defvar chess-common-temp-files nil)
(make-variable-buffer-local 'chess-common-temp-files)
(defmacro chess-with-temp-file (&rest body)
`(let ((file (make-temp-file "chess")))
(with-temp-file file
,@body)
(push file chess-common-temp-files)
file))
(put 'chess-with-temp-file 'lisp-indent-function 1)
(defun chess-common-handler (event &rest args)
"Initialize the network chess engine."
(cond
((eq event 'initialize)
(let* ((name (car args))
(path (intern (concat "chess-" name "-path")))
proc)
(message "Starting chess program '%s'..." name)
(unless (boundp path)
(error "Cannot find %s executable; check `%s'" name path))
(setq proc (start-process (concat "chess-" name)
(current-buffer) (symbol-value path)))
(message "Starting chess program '%s'...done" name)
proc))
((eq event 'ready)
(chess-game-set-data chess-engine-game 'active t))
((eq event 'shutdown)
(chess-engine-send nil "quit\n")
(dolist (file chess-common-temp-files)
(if (file-exists-p file)
(delete-file file)))
(setq chess-common-temp-files nil))
((eq event 'pass)
(chess-engine-send nil "go\n"))
((eq event 'resign)
(chess-engine-send nil "resign\n"))
((eq event 'draw)
(message "Your draw offer was declined"))
((memq event '(resign abort))
(chess-engine-send nil "new\n")
(chess-engine-set-position nil))
((eq event 'undo)
(dotimes (i (car args))
(chess-engine-send nil "undo\n"))
(if (= 1 (mod (car args) 2))
(chess-engine-send nil "go\n"))
;; prevent use from handling the `undo' event which this triggers
(let ((chess-engine-handling-event t))
(chess-game-undo chess-engine-game (car args))))
((eq event 'move)
(chess-engine-send nil (concat (chess-ply-to-algebraic (car args))
"\n")))))
(provide 'chess-common)
;;; chess-common.el ends here
|
