X-Git-Url: https://cgit.sxemacs.org/?a=blobdiff_plain;ds=inline;f=lisp%2Friece-ruby.el;h=7eed0a51adaf39c80641766b611fbec30116c556;hb=3f96431905954153b0ba6f92dee0cda74657b364;hp=5acdc3fbb6033d8a74ea0e307c54e03616450513;hpb=df263f543cfcb9c9c73f031c8e52d6c3be08c7a3;p=riece

diff --git a/lisp/riece-ruby.el b/lisp/riece-ruby.el
index 5acdc3f..7eed0a5 100644
--- a/lisp/riece-ruby.el
+++ b/lisp/riece-ruby.el
@@ -1,4 +1,4 @@
-;;; riece-ruby.el --- interact with ruby interpreter
+;;; riece-ruby.el --- interact with Ruby interpreter
 ;; Copyright (C) 1998-2005 Daiki Ueno
 
 ;; Author: Daiki Ueno <ueno@unixuser.org>
@@ -22,30 +22,76 @@
 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 ;; Boston, MA 02111-1307, USA.
 
+;;; Commentary:
+
+;; riece-ruby.el is a library to interact with Ruby interpreter.
+;; It supports concurrent execution of Ruby programs in a single
+;; session.  For example:
+;; 
+;; (riece-ruby-execute "sleep 30"); returns immediately
+;; => "rubyserv0"
+;;
+;; (riece-ruby-execute "1 + 1")
+;; => "rubyserv1"
+;;
+;; (riece-ruby-execute "\"")
+;; => "rubyserv2"
+;;
+;; (riece-ruby-inspect "rubyserv0")
+;; => ((OK nil) nil "running")
+;;
+;; (riece-ruby-inspect "rubyserv1")
+;; => ((OK nil) "2" "finished")
+;;
+;; (riece-ruby-inspect "rubyserv2")
+;; => ((OK nil) "(eval):1: unterminated string meets end of file" "exited")
+
 ;;; Code:
 
-(defvar riece-ruby-command "ruby"
-  "Command name for Ruby interpreter.")
+(defgroup riece-ruby nil
+  "Interact with Ruby interpreter."
+  :group 'riece)
 
-(defvar riece-ruby-process nil)
+(defcustom riece-ruby-command "ruby"
+  "Command name for Ruby interpreter."
+  :type 'string
+  :group 'riece-ruby)
 
-(defvar riece-ruby-lock nil)
-(defvar riece-ruby-response nil)
-(defvar riece-ruby-data nil)
-(defvar riece-ruby-input nil)
-(defvar riece-ruby-status nil)
+(defvar riece-ruby-server-program "server.rb"
+  "The server program file.  If the filename is not absolute, it is
+assumed that the file is in the same directory of this file.")
 
-(defvar riece-ruby-output-handler-alist nil)
-(defvar riece-ruby-exit-handler-alist nil)
+(defvar riece-ruby-process nil
+  "Process object of Ruby interpreter.")
 
-(defun riece-ruby-substitute-variables (program variable value)
-  (setq program (copy-sequence program))
-  (let ((pointer program))
-    (while pointer
-      (setq pointer (memq variable program))
-      (if pointer
-	  (setcar pointer value)))
-    program))
+(defvar riece-ruby-lock nil
+  "Lock for waiting server response.
+Local to the process buffer.")
+(defvar riece-ruby-response nil
+  "The server response.
+Local to the process buffer.")
+(defvar riece-ruby-data nil
+  "Data from server.
+Local to the process buffer.")
+(defvar riece-ruby-escaped-data nil
+  "Escaped data from server.  This variable is cleared every time
+server response arrives.
+Local to the process buffer.")
+(defvar riece-ruby-status-alist nil
+  "Status from server.
+Local to the process buffer.")
+
+(defvar riece-ruby-output-handler-alist nil
+  "An alist mapping from program name to output handler.
+Output handlers are called every time \"# output\" line arrives.
+Use `riece-ruby-set-output-handler' to set this variable.")
+(defvar riece-ruby-exit-handler-alist nil
+  "An alist mapping from program name to exit handler.
+Exit handlers are called once when \"# exit\" line arrives.
+Use `riece-ruby-set-exit-handler' to set this variable.")
+(defvar riece-ruby-property-alist nil
+  "An alist mapping from program name to the property list.
+Use `riece-ruby-set-property' to set this variable.")
 
 (defun riece-ruby-escape-data (data)
   (let ((index 0))
@@ -67,7 +113,20 @@
 	    index (- (match-end 0) 2)))
     data))
 
-(defun riece-ruby-send-eval (name program)
+(defun riece-ruby-reset-process-buffer ()
+  (save-excursion
+    (set-buffer (process-buffer riece-ruby-process))
+    (buffer-disable-undo)
+    (make-local-variable 'riece-ruby-response)
+    (setq riece-ruby-response nil)
+    (make-local-variable 'riece-ruby-data)
+    (setq riece-ruby-data nil)
+    (make-local-variable 'riece-ruby-escaped-data)
+    (setq riece-ruby-escaped-data nil)
+    (make-local-variable 'riece-ruby-status-alist)
+    (setq riece-ruby-status-alist nil)))
+
+(defun riece-ruby-send-eval (program)
   (let* ((string (riece-ruby-escape-data program))
 	 (length (- (length string) 998))
 	 (index 0)
@@ -77,42 +136,21 @@
 		       data)))
     (setq data (cons (substring string index) data)
 	  data (nreverse data))
-    (save-excursion
-      (set-buffer (process-buffer riece-ruby-process))
-      (make-local-variable 'riece-ruby-lock)
-      (setq riece-ruby-lock nil)
-      (make-local-variable 'riece-ruby-response)
-      (setq riece-ruby-response nil)
-      (make-local-variable 'riece-ruby-data)
-      (setq riece-ruby-data nil)
-      (make-local-variable 'riece-ruby-input)
-      (setq riece-ruby-input nil)
-      (make-local-variable 'riece-ruby-status)
-      (setq riece-ruby-status nil))
-    (process-send-string riece-ruby-process
-			 (concat "EVAL " name "\r\n"))
+    (process-send-string riece-ruby-process "EVAL\r\n")
     (while data
       (process-send-string riece-ruby-process
 			   (concat "D " (car data) "\r\n"))
       (setq data (cdr data)))
     (process-send-string riece-ruby-process "END\r\n")))
-    
+
 (defun riece-ruby-send-poll (name)
-  (save-excursion
-    (set-buffer (process-buffer riece-ruby-process))
-    (make-local-variable 'riece-ruby-lock)
-    (setq riece-ruby-lock nil)
-    (make-local-variable 'riece-ruby-response)
-    (setq riece-ruby-response nil)
-    (make-local-variable 'riece-ruby-data)
-    (setq riece-ruby-data nil)
-    (make-local-variable 'riece-ruby-input)
-    (setq riece-ruby-input nil)
-    (make-local-variable 'riece-ruby-status)
-    (setq riece-ruby-status nil))
   (process-send-string riece-ruby-process
 		       (concat "POLL " name "\r\n")))
 
+(defun riece-ruby-send-exit (name)
+  (process-send-string riece-ruby-process
+		       (concat "EXIT " name "\r\n")))
+
 (defun riece-ruby-filter (process input)
   (save-excursion
     (set-buffer (process-buffer process))
@@ -120,71 +158,189 @@
     (insert input)
     (goto-char (process-mark process))
     (beginning-of-line)
-    (while (looking-at ".*\r?\n")
+    (while (looking-at ".*\r\n")
       (if (looking-at "OK\\( \\(.*\\)\\)?\r")
 	  (progn
-	    (if riece-ruby-input
+	    (if riece-ruby-escaped-data
 		(setq riece-ruby-data (mapconcat #'riece-ruby-unescape-data
-						 riece-ruby-input "")))
-	    (setq riece-ruby-input nil
+						 riece-ruby-escaped-data "")))
+	    (setq riece-ruby-escaped-data nil
 		  riece-ruby-response (list 'OK (match-string 2))
 		  riece-ruby-lock nil))
 	(if (looking-at "ERR \\([0-9]+\\)\\( \\(.*\\)\\)?\r")
 	    (progn
-	      (setq riece-ruby-input nil
+	      (setq riece-ruby-escaped-data nil
 		    riece-ruby-response
 		    (list 'ERR (string-to-number (match-string 2))
 			  (match-string 3))
 		    riece-ruby-lock nil))
 	  (if (looking-at "D \\(.*\\)\r")
-	      (setq riece-ruby-input (cons (match-string 1) riece-ruby-input))
-	    (if (looking-at "S program \\(.*\\)\r")
-		(setq riece-ruby-status (match-string 1))
-	      (if (looking-at "# output \\(.*\\) \\(.*\\)\r")
+	      (setq riece-ruby-escaped-data (cons (match-string 1)
+						  riece-ruby-escaped-data))
+	    (if (looking-at "S \\([^ ]*\\) \\(.*\\)\r")
+		(progn
+		  (setq riece-ruby-status-alist (cons (cons (match-string 1)
+							    (match-string 2))
+						      riece-ruby-status-alist))
+		  (if (member (car (car riece-ruby-status-alist))
+			      '("finished" "exited"))
+		      (riece-ruby-run-exit-handler
+		       (cdr (car riece-ruby-status-alist)))))
+	      (if (looking-at "# output \\([^ ]*\\) \\(.*\\)\r")
 		  (let ((entry (assoc (match-string 1)
 				      riece-ruby-output-handler-alist)))
 		    (if entry
-			(funcall (cdr entry) (match-string 2))))
+			(funcall (cdr entry) (car entry) (match-string 2))))
 		(if (looking-at "# exit \\(.*\\)\r")
-		    (let ((entry (assoc (match-string 1)
-					riece-ruby-exit-handler-alist)))
-		      (if entry
-			  (funcall (cdr entry))))))))))
+		    (riece-ruby-run-exit-handler (match-string 1))))))))
       (forward-line))
     (set-marker (process-mark process) (point-marker))))
 
+(defun riece-ruby-run-exit-handler (name)
+  (let ((entry (assoc name riece-ruby-exit-handler-alist)))
+    (if entry
+	(progn
+	  (setq riece-ruby-exit-handler-alist
+		(delq entry riece-ruby-exit-handler-alist))
+	  (funcall (cdr entry) (car entry))
+	  (riece-ruby-clear name)))))
+
 (defun riece-ruby-sentinel (process status)
   (kill-buffer (process-buffer process)))
 
-(defun riece-ruby-execute (name program)
+(defun riece-ruby-execute (program)
+  "Schedule an execution of a Ruby PROGRAM.
+Return a string name assigned by the server."
   (unless (and riece-ruby-process
 	       (eq (process-status riece-ruby-process) 'run))
-    (setq riece-ruby-process
-	  (start-process "riece-ruby" (generate-new-buffer " *Ruby*")
-			 riece-ruby-command
-			 (expand-file-name
-			  "rubyserv.rb"
-			  (file-name-directory
-			   (symbol-file 'riece-ruby-execute)))))
-    (set-process-filter riece-ruby-process #'riece-ruby-filter)
-    (set-process-sentinel riece-ruby-process #'riece-ruby-sentinel))
+    (let (selective-display
+	  (coding-system-for-write 'binary)
+	  (coding-system-for-read 'binary))
+      (setq riece-ruby-process
+	    (start-process "riece-ruby" (generate-new-buffer " *Ruby*")
+			   riece-ruby-command
+			   (if (file-name-absolute-p riece-ruby-server-program)
+			       riece-ruby-server-program
+			     (expand-file-name
+			      riece-ruby-server-program
+			      (file-name-directory
+			       (locate-library
+				(symbol-file 'riece-ruby-execute)))))))
+      (process-kill-without-query riece-ruby-process)
+      (set-process-filter riece-ruby-process #'riece-ruby-filter)
+      (set-process-sentinel riece-ruby-process #'riece-ruby-sentinel)))
   (save-excursion
     (set-buffer (process-buffer riece-ruby-process))
+    (riece-ruby-reset-process-buffer)
+    (make-local-variable 'riece-ruby-lock)
     (setq riece-ruby-lock t)
-    (riece-ruby-send-eval name program)
+    (riece-ruby-send-eval program)
     (while riece-ruby-lock
-      (accept-process-output riece-ruby-process))))
+      (accept-process-output riece-ruby-process))
+    (if (eq (car riece-ruby-response) 'ERR)
+	(error "Couldn't execute: %S" (cdr riece-ruby-response)))
+    (cdr (assoc "name" riece-ruby-status-alist))))
 
 (defun riece-ruby-inspect (name)
+  "Inspect a result of program execution distinguished by NAME.
+Return a three element list.
+The car is protocol response line which looks like:
+  \(ERR 103 \"Not implemented\").
+The cadr is data from the server, that is, the result of the program.
+The caddr is status from the server."
   (save-excursion
     (set-buffer (process-buffer riece-ruby-process))
+    (riece-ruby-reset-process-buffer)
+    (make-local-variable 'riece-ruby-lock)
     (setq riece-ruby-lock t)
     (riece-ruby-send-poll name)
-    (while (null riece-ruby-response)
+    (while riece-ruby-lock
       (accept-process-output riece-ruby-process))
     (list riece-ruby-response
 	  riece-ruby-data
-	  riece-ruby-status)))
+	  riece-ruby-status-alist)))
+
+(defun riece-ruby-clear (name)
+  "Clear a result of program execution distinguished by NAME.
+Note that riece-ruby-clear is automatically called iff an exit-handler
+is specified.  Otherwise, it should be called explicitly."
+  (save-excursion
+    (set-buffer (process-buffer riece-ruby-process))
+    (riece-ruby-reset-process-buffer)
+    (make-local-variable 'riece-ruby-lock)
+    (setq riece-ruby-lock t)
+    (riece-ruby-send-exit name)
+    (while riece-ruby-lock
+      (accept-process-output riece-ruby-process)))
+  (let ((entry (assoc name riece-ruby-property-alist)))
+    (if entry
+	(delq entry riece-ruby-property-alist))))
+
+(defun riece-ruby-set-exit-handler (name handler)
+  "Set an exit-handler HANDLER for the program distinguished by NAME.
+An exit-handler is called when the program is finished or exited abnormally.
+An exit-handler is called with an argument same as NAME.
+Note that riece-ruby-clear is automatically called iff an exit-handler
+is specified.  Otherwise, it should be called explicitly."
+  (let ((entry (assoc name riece-ruby-exit-handler-alist)))
+    (if handler
+	(progn
+	  (if entry
+	      (setcdr entry handler)
+	    (setq riece-ruby-exit-handler-alist
+		  (cons (cons name handler)
+			riece-ruby-exit-handler-alist)))
+	  ;;check if the program already exited
+	  (riece-ruby-inspect name))
+      (if entry
+	  (setq riece-ruby-exit-handler-alist
+		(delq entry riece-ruby-exit-handler-alist))))))
+
+(defun riece-ruby-set-output-handler (name handler)
+  "Set an output-handler HANDLER for the program distinguished by NAME.
+An output-handler is called when the program sends any output by using
+`output' method in the Ruby program.
+An output-handler is called with two argument.  The first argument is
+the same as NAME.  The second argument is output string."
+  (let ((entry (assoc name riece-ruby-output-handler-alist)))
+    (if handler
+	(progn
+	  (if entry
+	      (setcdr entry handler)
+	    (setq riece-ruby-output-handler-alist
+		  (cons (cons name handler)
+			riece-ruby-output-handler-alist))))
+      (if entry
+	  (setq riece-ruby-output-handler-alist
+		(delq entry riece-ruby-output-handler-alist))))))
+
+(defun riece-ruby-set-property (name property value)
+  "Set given PROPERTY/VALUE pair to the program distinguished by NAME."
+  (let ((entry (assoc name riece-ruby-property-alist))
+	property-entry)
+    (unless entry
+      (setq entry (list name)
+	    riece-ruby-property-alist (cons entry riece-ruby-property-alist)))
+    (if (setq property-entry (assoc property (cdr entry)))
+	(setcdr property-entry value)
+      (setcdr entry (cons (cons property value) (cdr entry))))))
+
+(defun riece-ruby-property (name property)
+  "Return the value of PROPERTY set to the program distinguished by NAME."
+  (cdr (assoc property (cdr (assoc name riece-ruby-property-alist)))))
+
+(defun riece-ruby-substitute-variables (program alist)
+  "Substitute symbols in PROGRAM by looking up ALIST.
+Return a string concatenating elements in PROGRAM."
+  (setq program (copy-sequence program))
+  (while alist
+    (let ((pointer program))
+      (while pointer
+	(setq pointer (memq (car (car alist)) program))
+	(if pointer
+	    (setcar pointer (cdr (car alist))))))
+    (setq alist (cdr alist)))
+  (apply #'concat program))
 
 (provide 'riece-ruby)