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|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;
;; A game database that uses SCID for storage/retrieval
;;
;; The advantage is that it's much faster than PGN, and far, far more
;; compact.
;;
(defvar chess-scid-process)
(make-variable-buffer-local 'chess-scid-process)
(defun chess-scid-get-result (command)
(let ((here (point-max)))
(process-send-string chess-scid-process command)
(accept-process-output chess-scid-process)
(goto-char (point-max))
(while (memq (char-before) '(? ?\t ?\n ?\r ?\%))
(backward-char 1))
(buffer-substring here (point))))
(defun chess-scid-handler (event &rest args)
(cond
((eq event 'open)
(if (file-readable-p (concat (car args) ".sg3"))
(let* ((buffer (generate-new-buffer " *chess-scid*"))
(proc (start-process "*chess-scid*" buffer
(executable-find "tcscid"))))
(if (and proc (eq (process-status proc) 'run))
(with-current-buffer buffer
(accept-process-output proc)
(setq chess-scid-process proc)
(if (= 1 (string-to-int
(chess-scid-get-result
(format "sc_base open %s\n"
(expand-file-name (car args))))))
buffer
(kill-process proc)
(kill-buffer buffer)
nil))
(kill-buffer buffer)
nil))))
((eq event 'close)
(process-send-string chess-scid-process "sc_base close\nexit\n"))
((eq event 'count)
(string-to-int (chess-scid-get-result "sc_base numGames\n")))
((eq event 'read)
(let ((here (point-max)) game)
(process-send-string chess-scid-process
(format "sc_game load %d\nsc_game pgn\n"
(car args)))
(accept-process-output chess-scid-process)
(goto-char here)
(when (setq game (chess-pgn-to-game))
(chess-game-set-data game 'database (current-buffer))
(chess-game-set-data game 'database-index (car args))
(chess-game-set-data game 'database-count
(chess-scid-handler 'count))
game)))
((eq event 'write)
(chess-scid-handler 'replace 0 (car args)))
((eq event 'replace)
(let ((index (or (cadr args)
(chess-game-data (car args) 'database-index))))
(process-send-string chess-scid-process
(format "sc_game import \"%s\"\n"
(chess-game-to-string (cadr args))))
(process-send-string chess-scid-process
(format "sc_game save %d\n" index))))))
(provide 'chess-scid)
;;; chess-scid.el ends here
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