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

   1 ;;; chess-fruit.el --- Play against fruit!
   2
   3 ;; Copyright (C) 2014  Free Software Foundation, Inc.
   4
   5 ;; Author: Mario Lang <mlang@delysid.org>
   6 ;; Keywords: games, processes
   7
   8 ;; This program is free software; you can redistribute it and/or modify
   9 ;; it under the terms of the GNU General Public License as published by
  10 ;; the Free Software Foundation, either version 3 of the License, or
  11 ;; (at your option) any later version.
  12
  13 ;; This program is distributed in the hope that it will be useful,
  14 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 ;; GNU General Public License for more details.
  17
  18 ;; You should have received a copy of the GNU General Public License
  19 ;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20
  21 ;;; Code:
  22
  23 (require 'chess-uci)
  24
  25 (defgroup chess-fruit nil
  26   "The publically available chess engine 'fruit'."
  27   :group 'chess-engine
  28   :link '(url-link "http://www.fruitchess.com/"))
  29
  30 (defcustom chess-fruit-path (executable-find "fruit")
  31   "*The path to the fruit executable."
  32   :type 'file
  33   :group 'chess-fruit)
  34
  35 (defvar chess-fruit-regexp-alist chess-uci-regexp-alist
  36   "Patterns used to match engine output.")
  37
  38 (defun chess-fruit-handler (game event &rest args)
  39   (unless chess-engine-handling-event
  40     (cond
  41      ((eq event 'initialize)
  42       (let ((proc (chess-uci-handler game 'initialize "fruit")))
  43         (when (and proc (processp proc) (eq (process-status proc) 'run))
  44           (process-send-string proc "uci\n")
  45           (setq chess-engine-process proc)
  46           t)))
  47
  48      (t
  49       (if (and (eq event 'undo)
  50                (= 1 (mod (car args) 2)))
  51           (error "Cannot undo until after fruit moves"))
  52
  53       (apply 'chess-uci-handler game event args)))))
  54
  55 (provide 'chess-fruit)
  56
  57 ;;; chess-fruit.el ends here