plugins/org.eclipse.dltk.ruby.debug/debugger/dbgp/socket_io.rb

###############################################################################
# Copyright (c) 2005, 2007 IBM Corporation and others.
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Eclipse Public License v1.0
# which accompanies this distribution, and is available at
# http://www.eclipse.org/legal/epl-v10.html
#

###############################################################################

require 'socket'
require 'io/wait'

module XoredDebugger

    class SocketIO
        def log_send(text)
            @logger.puts('>>> ' + text)
        end
        private :log_send
        

        def log_receive(text)
            @logger.puts('<<< ' + text)
        end
        private :log_receive

        def initialize(host, port, logger, printer)
            @socket = TCPSocket.new(host, port)
            @logger = logger
            @printer = printer
        end

        def send(command, data)
            xml = @printer.print(command, data)
            
            #DEBUGGER: [NUMBER] [NULL] XML(data) [NULL]
            @socket.write(xml.length.to_s)
            @socket.putc(0)
            @socket.write(xml)
            @socket.putc(0)
            @socket.flush

            log_send(xml)
        end

        def has_data?
            @socket.ready?
        end

        def receive()
            #IDE: command [SPACE] [args] -- data [NULL]
            line = ''
            while((ch = @socket.getc) != 0)
                line << ch
            end
            
            log_receive(line)

            line
        end

        def close
            @socket.close
        end
    end # class SocketIO

end # module