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[shogi-server] - Released: Revision "20131215"
[shogi-server/shogi-server.git] / shogi-server
index d5f04b2..33a2d70 100755 (executable)
-#! /usr/bin/env ruby
-## $Id$
-
-## Copyright (C) 2004 NABEYA Kenichi (aka nanami@2ch)
-##
-## This program is free software; you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation; either version 2 of the License, or
-## (at your option) any later version.
-##
-## This program is distributed in the hope that it will be useful,
-## but WITHOUT ANY WARRANTY; without even the implied warranty of
-## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-## GNU General Public License for more details.
-##
-## You should have received a copy of the GNU General Public License
-## along with this program; if not, write to the Free Software
-## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
-
-Max_Write_Queue_Size = 1000
-Max_Identifier_Length = 32
-Default_Timeout = 60            # for single socket operation
-
-Default_Game_Name = "default-1500-0"
-
-One_Time = 10
-Least_Time_Per_Move = 1
-Login_Time = 300                # time for LOGIN
-
-Release = "$Name$".split[1].sub(/\A[^\d]*/, '').gsub(/_/, '.')
-Release.concat("-") if (Release == "")
-Revision = "$Revision$".gsub(/[^\.\d]/, '')
-
-STDOUT.sync = true
-STDERR.sync = true
-
-require 'getoptlong'
-require 'thread'
-require 'timeout'
-require 'socket'
-require 'yaml'
-require 'yaml/store'
-require 'digest/md5'
-
-TCPSocket.do_not_reverse_lookup = true
-Thread.abort_on_exception = true
-
-
-class TCPSocket
-  def gets_timeout(t = Default_Timeout)
-    begin
-      timeout(t) do
-        return self.gets
-      end
-    rescue TimeoutError
-      return nil
-    rescue
-      return nil
-    end
-  end
-  def gets_safe(t = nil)
-    if (t && t > 0)
-      begin
-        timeout(t) do
-          return self.gets
-        end
-      rescue TimeoutError
-        return :timeout
-      rescue
-        return nil
-      end
-    else
-      begin
-        return self.gets
-      rescue
-        return nil
-      end
-    end
-  end
-  def write_safe(str)
-    begin
-      return self.write(str)
-    rescue
-      return nil
-    end
-  end
-end
-
-
-class League
-  def initialize
-    @games = Hash::new
-    @players = Hash::new
-    @event = nil
-    @db = YAML::Store.new( File.join(File.dirname(__FILE__), "players.yaml") )
-  end
-  attr_accessor :players, :games, :event
-
-  def add(player)
-    self.load(player) if player.id
-    @players[player.name] = player
-  end
-  
-  def delete(player)
-    @players.delete(player.name)
-  end
-  
-  def get_player(status, game_name, sente, searcher=nil)
-    @players.each do |name, player|
-      if ((player.status == status) &&
-          (player.game_name == game_name) &&
-          ((sente == nil) || (player.sente == nil) || (player.sente == sente)) &&
-          ((searcher == nil) || (player != searcher)))
-        return player
-      end
-    end
-    return nil
-  end
-  
-  def load(player)
-    hash = search(player.id)
-    if hash
-      # a current user
-      player.name = hash['name']
-      player.rate = hash['rate']
-      player.modified_at = hash['modified_at']
-    end
-  end
-
-  def search(id)
-    hash = nil
-    @db.transaction do
-      hash = @db[id]
-    end
-    hash
-  end
-
-  def rated_players
-    players = []
-    @db.transaction(true) do
-      @db.roots.each do |id|
-        players << id
-      end
-    end
-    return players.collect do |id|
-      p = RatedPlayer.new
-      p.id = id
-      self.load(p)
-      p
-    end
-  end
-end
-
-
-class RatedPlayer
-  # Idetifier of the player in the rating system
-  attr_accessor :id
-  # Name of the player
-  attr_accessor :name
-  # Score in the rating sysem
-  attr_accessor :rate
-  # Last timestamp when the rate was modified
-  attr_accessor :modified_at
-
-  def modified_at
-    @modified_at || Time.now
-  end
-
-  def rate=(new_rate)
-    if @rate != new_rate
-      @rate = new_rate
-      @modified_at = Time.now
-    end
-  end
-
-  def rated?
-    @id != nil
-  end
-end
-
-class Player < RatedPlayer
-  def initialize(str, socket)
-    @name = nil
-    @password = nil
-    @socket = socket
-    @status = "connected"        # game_waiting -> agree_waiting -> start_waiting -> game -> finished
-
-    @protocol = nil             # CSA or x1
-    @eol = "\m"                 # favorite eol code
-    @game = nil
-    @game_name = ""
-    @mytime = 0                 # set in start method also
-    @sente = nil
-    @writer_thread = nil
-    @main_thread = nil
-    @write_queue = Queue::new
-    login(str)
-  end
-
-  attr_accessor :password, :socket, :status
-  attr_accessor :protocol, :eol, :game, :mytime, :game_name, :sente
-  attr_accessor :main_thread, :writer_thread, :write_queue
-  
-  def kill
-    log_message(sprintf("user %s killed", @name))
-    if (@game)
-      @game.kill(self)
-    end
-    finish
-    Thread::kill(@main_thread) if @main_thread
-  end
-
-  def finish
-    if (@status != "finished")
-      @status = "finished"
-      log_message(sprintf("user %s finish", @name))    
-      Thread::kill(@writer_thread) if @writer_thread
-      begin
-        @socket.close if (! @socket.closed?)
-      rescue
-        log_message(sprintf("user %s finish failed", @name))    
-      end
-    end
-  end
-
-  def write_safe(str)
-    @write_queue.push(str.gsub(/[\r\n]+/, @eol))
-  end
-
-  def writer
-    while (str = @write_queue.pop)
-      @socket.write_safe(str)
-    end
-  end
-
-  def to_s
-    if ((status == "game_waiting") ||
-        (status == "start_waiting") ||
-        (status == "agree_waiting") ||
-        (status == "game"))
-      if (@sente)
-        return sprintf("%s %s %s %s +", @name, @protocol, @status, @game_name)
-      elsif (@sente == false)
-        return sprintf("%s %s %s %s -", @name, @protocol, @status, @game_name)
-      elsif (@sente == nil)
-        return sprintf("%s %s %s %s *", @name, @protocol, @status, @game_name)
-      end
-    else
-      return sprintf("%s %s %s", @name, @protocol, @status)
-    end
-  end
-
-  def write_help
-    @socket.write_safe('##[HELP] available commands "%%WHO", "%%CHAT str", "%%GAME game_name +", "%%GAME game_name -"')
-  end
-
-  def login(str)
-    str =~ /([\r\n]*)$/
-    @eol = $1
-    str.chomp!
-    (login, @name, @password, ext) = str.split
-    @name, trip = @name.split(",") # used by rating
-    @id = trip ? "%s+%s" % [@name, Digest::MD5.hexdigest(trip)] : nil
-    if (ext)
-      @protocol = "x1"
-    else
-      @protocol = "CSA"
-    end
-    @main_thread = Thread::current
-    @writer_thread = Thread::start do
-      writer()
-    end
-  end
-  
-  def run
-    write_safe(sprintf("LOGIN:%s OK\n", @name))
-    if (@protocol != "CSA")
-      log_message(sprintf("user %s run in %s mode", @name, @protocol))
-      write_safe(sprintf("##[LOGIN] +OK %s\n", @protocol))
-    else
-      log_message(sprintf("user %s run in CSA mode", @name))
-      if (good_game_name?(@password))
-        csa_1st_str = "%%GAME #{@password} *"
-      else
-        csa_1st_str = "%%GAME #{Default_Game_Name} *"
-      end
-    end
-    
-    while (csa_1st_str || (str = @socket.gets_safe(Default_Timeout)))
-      begin
-        $mutex.lock
-        if (csa_1st_str)
-          str = csa_1st_str
-          csa_1st_str = nil
-        end
-        if (@write_queue.size > Max_Write_Queue_Size)
-          log_warning(sprintf("write_queue of %s is %d", @name, @write_queue.size))
-               return
-        end
-
-        if (@status == "finished")
-          return
-        end
-        str.chomp! if (str.class == String)
-        case str
-        when /^[\+\-][^%]/
-          if (@status == "game")
-            array_str = str.split(",")
-            move = array_str.shift
-            additional = array_str.shift
-            if /^'(.*)/ =~ additional
-              comment = array_str.unshift("'*#{$1}")
-            end
-            s = @game.handle_one_move(move, self)
-            @game.fh.print("#{comment}\n") if (comment && !s)
-            return if (s && @protocol == "CSA")
-          end
-        when /^%[^%]/, :timeout
-          if (@status == "game")
-            s = @game.handle_one_move(str, self)
-            return if (s && @protocol == "CSA")
-          end
-        when /^REJECT/
-          if (@status == "agree_waiting")
-            @game.reject(@name)
-            return if (@protocol == "CSA")
-          else
-            write_safe(sprintf("##[ERROR] you are in %s status. AGREE is valid in agree_waiting status\n", @status))
-          end
-        when /^AGREE/
-          if (@status == "agree_waiting")
-            @status = "start_waiting"
-            if ((@game.sente.status == "start_waiting") &&
-                (@game.gote.status == "start_waiting"))
-              @game.start
-              @game.sente.status = "game"
-              @game.gote.status = "game"
-            end
-          else
-            write_safe(sprintf("##[ERROR] you are in %s status. AGREE is valid in agree_waiting status\n", @status))
-          end
-        when /^%%SHOW\s+(\S+)/
-          game_id = $1
-          if (LEAGUE.games[game_id])
-            write_safe(LEAGUE.games[game_id].show.gsub(/^/, '##[SHOW] '))
-          end
-          write_safe("##[SHOW] +OK\n")
-        when /^%%MONITORON\s+(\S+)/
-          game_id = $1
-          if (LEAGUE.games[game_id])
-            LEAGUE.games[game_id].monitoron(self)
-            write_safe(LEAGUE.games[game_id].show.gsub(/^/, "##[MONITOR][#{game_id}] "))
-            write_safe("##[MONITOR][#{game_id}] +OK\n")
-          end
-        when /^%%MONITOROFF\s+(\S+)/
-          game_id = $1
-          if (LEAGUE.games[game_id])
-            LEAGUE.games[game_id].monitoroff(self)
-          end
-        when /^%%HELP/
-          write_help
-        when /^%%RATING/
-          players = LEAGUE.rated_players
-          players.sort {|a,b| b.rate <=> a.rate}.each do |p|
-            write_safe("##[RATING] %s (%s) \t %4d @%s\n" % 
-                       [p.name, p.id, p.rate, p.modified_at.strftime("%Y-%m-%d")])
-          end
-          write_safe("##[RATING] +OK\n")
-        when /^%%GAME\s*$/
-          if ((@status == "connected") || (@status == "game_waiting"))
-            @status = "connected"
-            @game_name = ""
-          else
-            write_safe(sprintf("##[ERROR] you are in %s status. GAME is valid in connected or game_waiting status\n", @status))
-          end
-        when /^%%(GAME|CHALLENGE)\s+(\S+)\s+([\+\-\*])\s*$/
-          command_name = $1
-          game_name = $2
-          my_sente_str = $3
-          if (! good_game_name?(game_name))
-            write_safe(sprintf("##[ERROR] bad game name\n"))
-            next
-          elsif ((@status == "connected") || (@status == "game_waiting"))
-            ## continue
-          else
-            write_safe(sprintf("##[ERROR] you are in %s status. GAME is valid in connected or game_waiting status\n", @status))
-            next
-          end
-          if ((my_sente_str == "*") ||
-              (my_sente_str == "+") ||
-              (my_sente_str == "-"))
-            ## ok
-          else
-            write_safe(sprintf("##[ERROR] bad game option\n"))
-            next
-          end
-
-          if (my_sente_str == "*")
-            rival = LEAGUE.get_player("game_waiting", game_name, nil, self) # no preference
-          elsif (my_sente_str == "+")
-            rival = LEAGUE.get_player("game_waiting", game_name, false, self) # rival must be gote
-          elsif (my_sente_str == "-")
-            rival = LEAGUE.get_player("game_waiting", game_name, true, self) # rival must be sente
-          else
-            ## never reached
-          end
-          if (rival)
-            @game_name = game_name
-            if ((my_sente_str == "*") && (rival.sente == nil))
-              if (rand(2) == 0)
-                @sente = true
-                rival.sente = false
-              else
-                @sente = false
-                rival.sente = true
-              end
-            elsif (rival.sente == true) # rival has higher priority
-              @sente = false
-            elsif (rival.sente == false)
-              @sente = true
-            elsif (my_sente_str == "+")
-              @sente = true
-              rival.sente = false
-            elsif (my_sente_str == "-")
-              @sente = false
-              rival.sente = true
-            else
-              ## never reached
-            end
-            Game::new(@game_name, self, rival)
-            self.status = "agree_waiting"
-            rival.status = "agree_waiting"
-          else # rival not found
-            if (command_name == "GAME")
-              @status = "game_waiting"
-              @game_name = game_name
-              if (my_sente_str == "+")
-                @sente = true
-              elsif (my_sente_str == "-")
-                @sente = false
-              else
-                @sente = nil
-              end
-            else                # challenge
-              write_safe(sprintf("##[ERROR] can't find rival for %s\n", game_name))
-              @status = "connected"
-              @game_name = ""
-              @sente = nil
-            end
-          end
-        when /^%%CHAT\s+(.+)/
-          message = $1
-          LEAGUE.players.each do |name, player|
-            if (player.protocol != "CSA")
-              player.write_safe(sprintf("##[CHAT][%s] %s\n", @name, message)) 
-            end
-          end
-        when /^%%LIST/
-          buf = Array::new
-          LEAGUE.games.each do |id, game|
-            buf.push(sprintf("##[LIST] %s\n", id))
-          end
-          buf.push("##[LIST] +OK\n")
-          write_safe(buf.join)
-        when /^%%WHO/
-          buf = Array::new
-          LEAGUE.players.each do |name, player|
-            buf.push(sprintf("##[WHO] %s\n", player.to_s))
-          end
-          buf.push("##[WHO] +OK\n")
-          write_safe(buf.join)
-        when /^LOGOUT/
-          @status = "connected"
-          write_safe("LOGOUT:completed\n")
-          return
-        when /^\s*$/
-          ## ignore null string
-        else
-          write_safe(sprintf("##[ERROR] unknown command %s\n", str))
-        end
-      ensure
-        $mutex.unlock
-      end
-    end                         # enf of while
-  end
-end
-
-class Piece
-  PROMOTE = {"FU" => "TO", "KY" => "NY", "KE" => "NK", "GI" => "NG", "KA" => "UM", "HI" => "RY"}
-  def initialize(board, x, y, sente, promoted=false)
-    @board = board
-    @x = x
-    @y = y
-    @sente = sente
-    @promoted = promoted
-
-    if ((x == 0) || (y == 0))
-      if (sente)
-        hands = board.sente_hands
-      else
-        hands = board.gote_hands
-      end
-      hands.push(self)
-      hands.sort! {|a, b|
-        a.name <=> b.name
-      }
-    else
-      @board.array[x][y] = self
-    end
-  end
-  attr_accessor :promoted, :sente, :x, :y, :board
-
-  def room_of_head?(x, y, name)
-    true
-  end
-
-  def movable_grids
-    return adjacent_movable_grids + far_movable_grids
-  end
-
-  def far_movable_grids
-    return []
-  end
-
-  def jump_to?(x, y)
-    if ((1 <= x) && (x <= 9) && (1 <= y) && (y <= 9))
-      if ((@board.array[x][y] == nil) || # dst is empty
-          (@board.array[x][y].sente != @sente)) # dst is enemy
-        return true
-      end
-    end
-    return false
-  end
-
-  def put_to?(x, y)
-    if ((1 <= x) && (x <= 9) && (1 <= y) && (y <= 9))
-      if (@board.array[x][y] == nil) # dst is empty?
-        return true
-      end
-    end
-    return false
-  end
-
-  def adjacent_movable_grids
-    grids = Array::new
-    if (@promoted)
-      moves = @promoted_moves
-    else
-      moves = @normal_moves
-    end
-    moves.each do |(dx, dy)|
-      if (@sente)
-        cand_y = @y - dy
-      else
-        cand_y = @y + dy
-      end
-      cand_x = @x + dx
-      if (jump_to?(cand_x, cand_y))
-        grids.push([cand_x, cand_y])
-      end
-    end
-    return grids
-  end
-
-  def move_to?(x, y, name)
-    return false if (! room_of_head?(x, y, name))
-    return false if ((name != @name) && (name != @promoted_name))
-    return false if (@promoted && (name != @promoted_name)) # can't un-promote
-
-    if (! @promoted)
-      return false if (((@x == 0) || (@y == 0)) && (name != @name)) # can't put promoted piece
-      if (@sente)
-        return false if ((4 <= @y) && (4 <= y) && (name != @name)) # can't promote
-      else
-        return false if ((6 >= @y) && (6 >= y) && (name != @name))
-      end
-    end
-
-    if ((@x == 0) || (@y == 0))
-      return jump_to?(x, y)
-    else
-      return movable_grids.include?([x, y])
-    end
-  end
-
-  def move_to(x, y)
-    if ((@x == 0) || (@y == 0))
-      if (@sente)
-        @board.sente_hands.delete(self)
-      else
-        @board.gote_hands.delete(self)
-      end
-      @board.array[x][y] = self
-    elsif ((x == 0) || (y == 0))
-      @promoted = false         # clear promoted flag before moving to hands
-      if (@sente)
-        @board.sente_hands.push(self)
-      else
-        @board.gote_hands.push(self)
-      end
-      @board.array[@x][@y] = nil
-    else
-      @board.array[@x][@y] = nil
-      @board.array[x][y] = self
-    end
-    @x = x
-    @y = y
-  end
-
-  def point
-    @point
-  end
-
-  def name
-    @name
-  end
-
-  def promoted_name
-    @promoted_name
-  end
-
-  def to_s
-    if (@sente)
-      sg = "+"
-    else
-      sg = "-"
-    end
-    if (@promoted)
-      n = @promoted_name
-    else
-      n = @name
-    end
-    return sg + n
-  end
-end
-
-class PieceFU < Piece
-  def initialize(*arg)
-    @point = 1
-    @normal_moves = [[0, +1]]
-    @promoted_moves = [[0, +1], [+1, +1], [-1, +1], [+1, +0], [-1, +0], [0, -1]]
-    @name = "FU"
-    @promoted_name = "TO"
-    super
-  end
-  def room_of_head?(x, y, name)
-    if (name == "FU")
-      if (@sente)
-        return false if (y == 1)
-      else
-        return false if (y == 9)
-      end
-      ## 2fu check
-      c = 0
-      iy = 1
-      while (iy <= 9)
-        if ((iy  != @y) &&      # not source position
-            @board.array[x][iy] &&
-            (@board.array[x][iy].sente == @sente) && # mine
-            (@board.array[x][iy].name == "FU") &&
-            (@board.array[x][iy].promoted == false))
-          return false
-        end
-        iy = iy + 1
-      end
-    end
-    return true
-  end
-end
-
-class PieceKY  < Piece
-  def initialize(*arg)
-    @point = 1
-    @normal_moves = []
-    @promoted_moves = [[0, +1], [+1, +1], [-1, +1], [+1, +0], [-1, +0], [0, -1]]
-    @name = "KY"
-    @promoted_name = "NY"
-    super
-  end
-  def room_of_head?(x, y, name)
-    if (name == "KY")
-      if (@sente)
-        return false if (y == 1)
-      else
-        return false if (y == 9)
-      end
-    end
-    return true
-  end
-  def far_movable_grids
-    grids = Array::new
-    if (@promoted)
-      return []
-    else
-      if (@sente)                 # up
-        cand_x = @x
-        cand_y = @y - 1
-        while (jump_to?(cand_x, cand_y))
-          grids.push([cand_x, cand_y])
-          break if (! put_to?(cand_x, cand_y))
-          cand_y = cand_y - 1
-        end
-      else                        # down
-        cand_x = @x
-        cand_y = @y + 1
-        while (jump_to?(cand_x, cand_y))
-          grids.push([cand_x, cand_y])
-          break if (! put_to?(cand_x, cand_y))
-          cand_y = cand_y + 1
-        end
-      end
-      return grids
-    end
-  end
-end
-class PieceKE  < Piece
-  def initialize(*arg)
-    @point = 1
-    @normal_moves = [[+1, +2], [-1, +2]]
-    @promoted_moves = [[0, +1], [+1, +1], [-1, +1], [+1, +0], [-1, +0], [0, -1]]
-    @name = "KE"
-    @promoted_name = "NK"
-    super
-  end
-  def room_of_head?(x, y, name)
-    if (name == "KE")
-      if (@sente)
-        return false if ((y == 1) || (y == 2))
-      else
-        return false if ((y == 9) || (y == 8))
-      end
-    end
-    return true
-  end
-end
-class PieceGI  < Piece
-  def initialize(*arg)
-    @point = 1
-    @normal_moves = [[0, +1], [+1, +1], [-1, +1], [+1, -1], [-1, -1]]
-    @promoted_moves = [[0, +1], [+1, +1], [-1, +1], [+1, +0], [-1, +0], [0, -1]]
-    @name = "GI"
-    @promoted_name = "NG"
-    super
-  end
-end
-class PieceKI  < Piece
-  def initialize(*arg)
-    @point = 1
-    @normal_moves = [[0, +1], [+1, +1], [-1, +1], [+1, +0], [-1, +0], [0, -1]]
-    @promoted_moves = []
-    @name = "KI"
-    @promoted_name = nil
-    super
-  end
-end
-class PieceKA  < Piece
-  def initialize(*arg)
-    @point = 5
-    @normal_moves = []
-    @promoted_moves = [[0, +1], [+1, 0], [-1, 0], [0, -1]]
-    @name = "KA"
-    @promoted_name = "UM"
-    super
-  end
-  def far_movable_grids
-    grids = Array::new
-    ## up right
-    cand_x = @x - 1
-    cand_y = @y - 1
-    while (jump_to?(cand_x, cand_y))
-      grids.push([cand_x, cand_y])
-      break if (! put_to?(cand_x, cand_y))
-      cand_x = cand_x - 1
-      cand_y = cand_y - 1
-    end
-    ## down right
-    cand_x = @x - 1
-    cand_y = @y + 1
-    while (jump_to?(cand_x, cand_y))
-      grids.push([cand_x, cand_y])
-      break if (! put_to?(cand_x, cand_y))
-      cand_x = cand_x - 1
-      cand_y = cand_y + 1
-    end
-    ## up left
-    cand_x = @x + 1
-    cand_y = @y - 1
-    while (jump_to?(cand_x, cand_y))
-      grids.push([cand_x, cand_y])
-      break if (! put_to?(cand_x, cand_y))
-      cand_x = cand_x + 1
-      cand_y = cand_y - 1
-    end
-    ## down left
-    cand_x = @x + 1
-    cand_y = @y + 1
-    while (jump_to?(cand_x, cand_y))
-      grids.push([cand_x, cand_y])
-      break if (! put_to?(cand_x, cand_y))
-      cand_x = cand_x + 1
-      cand_y = cand_y + 1
-    end
-    return grids
-  end
-end
-class PieceHI  < Piece
-  def initialize(*arg)
-    @point = 5
-    @normal_moves = []
-    @promoted_moves = [[+1, +1], [-1, +1], [+1, -1], [-1, -1]]
-    @name = "HI"
-    @promoted_name = "RY"
-    super
-  end
-  def far_movable_grids
-    grids = Array::new
-    ## up
-    cand_x = @x
-    cand_y = @y - 1
-    while (jump_to?(cand_x, cand_y))
-      grids.push([cand_x, cand_y])
-      break if (! put_to?(cand_x, cand_y))
-      cand_y = cand_y - 1
-    end
-    ## down
-    cand_x = @x
-    cand_y = @y + 1
-    while (jump_to?(cand_x, cand_y))
-      grids.push([cand_x, cand_y])
-      break if (! put_to?(cand_x, cand_y))
-      cand_y = cand_y + 1
-    end
-    ## right
-    cand_x = @x - 1
-    cand_y = @y
-    while (jump_to?(cand_x, cand_y))
-      grids.push([cand_x, cand_y])
-      break if (! put_to?(cand_x, cand_y))
-      cand_x = cand_x - 1
-    end
-    ## down
-    cand_x = @x + 1
-    cand_y = @y
-    while (jump_to?(cand_x, cand_y))
-      grids.push([cand_x, cand_y])
-      break if (! put_to?(cand_x, cand_y))
-      cand_x = cand_x + 1
-    end
-    return grids
-  end
-end
-class PieceOU < Piece
-  def initialize(*arg)
-    @point = 0
-    @normal_moves = [[0, +1], [+1, +1], [-1, +1], [+1, +0], [-1, +0], [0, -1], [+1, -1], [-1, -1]]
-    @promoted_moves = []
-    @name = "OU"
-    @promoted_name = nil
-    super
-  end
-end
-
-class Board
-  def initialize
-    @sente_hands = Array::new
-    @gote_hands = Array::new
-    @history = Hash::new
-    @sente_history = Hash::new
-    @gote_history = Hash::new
-    @array = [[], [], [], [], [], [], [], [], [], []]
-    @move_count = 0
-  end
-  attr_accessor :array, :sente_hands, :gote_hands, :history, :sente_history, :gote_history
-  attr_reader :move_count
-
-  def initial
-    PieceKY::new(self, 1, 1, false)
-    PieceKE::new(self, 2, 1, false)
-    PieceGI::new(self, 3, 1, false)
-    PieceKI::new(self, 4, 1, false)
-    PieceOU::new(self, 5, 1, false)
-    PieceKI::new(self, 6, 1, false)
-    PieceGI::new(self, 7, 1, false)
-    PieceKE::new(self, 8, 1, false)
-    PieceKY::new(self, 9, 1, false)
-    PieceKA::new(self, 2, 2, false)
-    PieceHI::new(self, 8, 2, false)
-    PieceFU::new(self, 1, 3, false)
-    PieceFU::new(self, 2, 3, false)
-    PieceFU::new(self, 3, 3, false)
-    PieceFU::new(self, 4, 3, false)
-    PieceFU::new(self, 5, 3, false)
-    PieceFU::new(self, 6, 3, false)
-    PieceFU::new(self, 7, 3, false)
-    PieceFU::new(self, 8, 3, false)
-    PieceFU::new(self, 9, 3, false)
-
-    PieceKY::new(self, 1, 9, true)
-    PieceKE::new(self, 2, 9, true)
-    PieceGI::new(self, 3, 9, true)
-    PieceKI::new(self, 4, 9, true)
-    PieceOU::new(self, 5, 9, true)
-    PieceKI::new(self, 6, 9, true)
-    PieceGI::new(self, 7, 9, true)
-    PieceKE::new(self, 8, 9, true)
-    PieceKY::new(self, 9, 9, true)
-    PieceKA::new(self, 8, 8, true)
-    PieceHI::new(self, 2, 8, true)
-    PieceFU::new(self, 1, 7, true)
-    PieceFU::new(self, 2, 7, true)
-    PieceFU::new(self, 3, 7, true)
-    PieceFU::new(self, 4, 7, true)
-    PieceFU::new(self, 5, 7, true)
-    PieceFU::new(self, 6, 7, true)
-    PieceFU::new(self, 7, 7, true)
-    PieceFU::new(self, 8, 7, true)
-    PieceFU::new(self, 9, 7, true)
-  end
-
-  def have_piece?(hands, name)
-    piece = hands.find { |i|
-      i.name == name
-    }
-    return piece
-  end
-
-  def move_to(x0, y0, x1, y1, name, sente)
-    if (sente)
-      hands = @sente_hands
-    else
-      hands = @gote_hands
-    end
-
-    if ((x0 == 0) || (y0 == 0))
-      piece = have_piece?(hands, name)
-      return :illegal if (! piece.move_to?(x1, y1, name))
-      piece.move_to(x1, y1)
-    else
-      return :illegal if (! @array[x0][y0].move_to?(x1, y1, name))
-      if (@array[x0][y0].name != name) # promoted ?
-        @array[x0][y0].promoted = true
-      end
-      if (@array[x1][y1])
-        if (@array[x1][y1].name == "OU")
-          return :outori        # return board update
-        end
-        @array[x1][y1].sente = @array[x0][y0].sente
-        @array[x1][y1].move_to(0, 0)
-        hands.sort! {|a, b|
-          a.name <=> b.name
-        }
-      end
-      @array[x0][y0].move_to(x1, y1)
-    end
-    @move_count += 1
-    return true
-  end
-
-  def look_for_ou(sente)
-    x = 1
-    while (x <= 9)
-      y = 1
-      while (y <= 9)
-        if (@array[x][y] &&
-            (@array[x][y].name == "OU") &&
-            (@array[x][y].sente == sente))
-          return @array[x][y]
-        end
-        y = y + 1
-      end
-      x = x + 1
-    end
-    raise "can't find ou"
-  end
-
-  def checkmated?(sente)        # sente is loosing
-    ou = look_for_ou(sente)
-    x = 1
-    while (x <= 9)
-      y = 1
-      while (y <= 9)
-        if (@array[x][y] &&
-            (@array[x][y].sente != sente))
-          if (@array[x][y].movable_grids.include?([ou.x, ou.y]))
-            return true
-          end
-        end
-        y = y + 1
-      end
-      x = x + 1
-    end
-    return false
-  end
-
-  def uchifuzume?(sente)
-    rival_ou = look_for_ou(! sente)   # rival's ou
-    if (sente)                  # rival is gote
-      if ((rival_ou.y != 9) &&
-          (@array[rival_ou.x][rival_ou.y + 1]) &&
-          (@array[rival_ou.x][rival_ou.y + 1].name == "FU") &&
-          (@array[rival_ou.x][rival_ou.y + 1].sente == sente)) # uchifu true
-        fu_x = rival_ou.x
-        fu_y = rival_ou.y + 1
-      else
-        return false
-      end
-    else                        # gote
-      if ((rival_ou.y != 0) &&
-          (@array[rival_ou.x][rival_ou.y - 1]) &&
-          (@array[rival_ou.x][rival_ou.y - 1].name == "FU") &&
-          (@array[rival_ou.x][rival_ou.y - 1].sente == sente)) # uchifu true
-        fu_x = rival_ou.x
-        fu_y = rival_ou.y - 1
-      else
-        return false
-      end
-    end
-    
-    ## case: rival_ou is moving
-    escaped = false
-    rival_ou.movable_grids.each do |(cand_x, cand_y)|
-      tmp_board = Marshal.load(Marshal.dump(self))
-      s = tmp_board.move_to(rival_ou.x, rival_ou.y, cand_x, cand_y, "OU", ! sente)
-      raise "internal error" if (s != true)
-      if (! tmp_board.checkmated?(! sente)) # good move
-        return false
-      end
-    end
-
-    ## case: rival is capturing fu
-    x = 1
-    while (x <= 9)
-      y = 1
-      while (y <= 9)
-        if (@array[x][y] &&
-            (@array[x][y].sente != sente) &&
-            @array[x][y].movable_grids.include?([fu_x, fu_y])) # capturable
-          if (@array[x][y].promoted)
-            name = @array[x][y].promoted_name
-          else
-            name = @array[x][y].name
-          end
-          tmp_board = Marshal.load(Marshal.dump(self))
-          s = tmp_board.move_to(x, y, fu_x, fu_y, name, ! sente)
-          raise "internal error" if (s != true)
-          if (! tmp_board.checkmated?(! sente)) # good move
-            return false
-          end
-        end
-        y = y + 1
-      end
-      x = x + 1
-    end
-    return true
-  end
-
-  def oute_sennichite?(sente)
-    if (checkmated?(! sente))
-      str = to_s
-      if (sente)
-        if (@sente_history[str] && (@sente_history[str] >= 3)) # already 3 times
-          return true
-        end
-      else
-        if (@gote_history[str] && (@gote_history[str] >= 3)) # already 3 times
-          return true
-        end
-      end
-    end
-    return false
-  end
-
-  def sennichite?(sente)
-    str = to_s
-    if (@history[str] && (@history[str] >= 3)) # already 3 times
-      return true
-    end
-    return false
-  end
-
-  def good_kachi?(sente)
-    if (checkmated?(sente))
-      puts "'NG: Checkmating." if $DEBUG
-      return false 
-    end
-    
-    ou = look_for_ou(sente)
-    if (sente && (ou.y >= 4))
-      puts "'NG: Black's OU does not enter yet." if $DEBUG
-      return false     
-    end  
-    if (! sente && (ou.y <= 6))
-      puts "'NG: White's OU does not enter yet." if $DEBUG
-      return false 
-    end
-      
-    number = 0
-    point = 0
-
-    if (sente)
-      hands = @sente_hands
-      r = [1, 2, 3]
-    else
-      hands = @gote_hands
-      r = [7, 8, 9]
-    end
-    r.each do |y|
-      x = 1
-      while (x <= 9)
-        if (@array[x][y] &&
-            (@array[x][y].sente == sente) &&
-            (@array[x][y].point > 0))
-          point = point + @array[x][y].point
-          number = number + 1
-        end
-        x = x + 1
-      end
-    end
-    hands.each do |piece|
-      point = point + piece.point
-    end
-
-    if (number < 10)
-      puts "'NG: Piece#[%d] is too small." % [number] if $DEBUG
-      return false     
-    end  
-    if (sente)
-      if (point < 28)
-        puts "'NG: Black's point#[%d] is too small." % [point] if $DEBUG
-        return false 
-      end  
-    else
-      if (point < 27)
-        puts "'NG: White's point#[%d] is too small." % [point] if $DEBUG
-        return false 
-      end
-    end
-
-    puts "'Good: Piece#[%d], Point[%d]." % [number, point] if $DEBUG
-    return true
-  end
-
-  def handle_one_move(str, sente=nil)
-    if (str =~ /^([\+\-])(\d)(\d)(\d)(\d)([A-Z]{2})/)
-      sg = $1
-      x0 = $2.to_i
-      y0 = $3.to_i
-      x1 = $4.to_i
-      y1 = $5.to_i
-      name = $6
-    elsif (str =~ /^%KACHI/)
-      raise ArgumentError, "sente is null", caller unless sente
-      if (good_kachi?(sente))
-        return :kachi_win
-      else
-        return :kachi_lose
-      end
-    elsif (str =~ /^%TORYO/)
-      return :toryo
-    else
-      return :illegal
-    end
-    
-    if (((x0 == 0) || (y0 == 0)) && # source is not from hand
-        ((x0 != 0) || (y0 != 0)))
-      return :illegal
-    elsif ((x1 == 0) || (y1 == 0)) # destination is out of board
-      return :illegal
-    end
-    
-    if (sg == "+")
-      sente = true
-      hands = @sente_hands
-    else
-      sente = false
-      hands = @gote_hands
-    end
-    
-    ## source check
-    if ((x0 == 0) && (y0 == 0))
-      return :illegal if (! have_piece?(hands, name))
-    elsif (! @array[x0][y0])
-      return :illegal           # no piece
-    elsif (@array[x0][y0].sente != sente)
-      return :illegal           # this is not mine
-    elsif (@array[x0][y0].name != name)
-      return :illegal if (@array[x0][y0].promoted_name != name) # can't promote
-    end
-
-    ## destination check
-    if (@array[x1][y1] &&
-        (@array[x1][y1].sente == sente)) # can't capture mine
-      return :illegal
-    elsif ((x0 == 0) && (y0 == 0) && @array[x1][y1])
-      return :illegal           # can't put on existing piece
-    end
-
-    tmp_board = Marshal.load(Marshal.dump(self))
-    return :illegal if (tmp_board.move_to(x0, y0, x1, y1, name, sente) == :illegal)
-    return :oute_kaihimore if (tmp_board.checkmated?(sente))
-    return :oute_sennichite if tmp_board.oute_sennichite?(sente)
-    return :sennichite if tmp_board.sennichite?(sente)
-
-    if ((x0 == 0) && (y0 == 0) && (name == "FU") && tmp_board.uchifuzume?(sente))
-      return :uchifuzume
-    end
-
-    move_to(x0, y0, x1, y1, name, sente)
-    str = to_s
-
-    if (checkmated?(! sente))
-      if (sente)
-        @sente_history[str] = (@sente_history[str] || 0) + 1
-      else
-        @gote_history[str] = (@gote_history[str] || 0) + 1
-      end
-    else
-      if (sente)
-        @sente_history.clear
-      else
-        @gote_history.clear
-      end
-    end
-    @history[str] = (@history[str] || 0) + 1
-    return :normal
-  end
-
-  def to_s
-    a = Array::new
-    y = 1
-    while (y <= 9)
-      a.push(sprintf("P%d", y))
-      x = 9
-      while (x >= 1)
-        piece = @array[x][y]
-        if (piece)
-          s = piece.to_s
-        else
-          s = " * "
-        end
-        a.push(s)
-        x = x - 1
-      end
-      a.push(sprintf("\n"))
-      y = y + 1
-    end
-    if (! sente_hands.empty?)
-      a.push("P+")
-      sente_hands.each do |p|
-        a.push("00" + p.name)
-      end
-      a.push("\n")
-    end
-    if (! gote_hands.empty?)
-      a.push("P-")
-      gote_hands.each do |p|
-        a.push("00" + p.name)
-      end
-      a.push("\n")
-    end
-    a.push("+\n")
-    return a.join
-  end
-end
-
-class GameResult
-  attr_reader :players, :black, :white
-
-  def initialize(p1, p2)
-    @players = []
-    @players << p1
-    @players << p2
-    if p1.sente && !p2.sente
-      @black, @white = p1, p2
-    elsif !p1.sente && p2.sente
-      @black, @white = p2, p1
-    else
-      raise "Never reached!"
-    end
-  end
-end
-
-class GameResultWin < GameResult
-  attr_reader :winner, :loser
-
-  def initialize(winner, loser)
-    super
-    @winner, @loser = winner, loser
-  end
-
-  def to_s
-    black_name = @black.id || @black.name
-    white_name = @white.id || @white.name
-    "%s:%s" % [black_name, white_name]
-  end
-end
-
-class GameResultDraw < GameResult
-
-end
-
-class Game
-  @@mutex = Mutex.new
-  @@time  = 0
-
-  def initialize(game_name, player0, player1)
-    @monitors = Array::new
-    @game_name = game_name
-    if (@game_name =~ /-(\d+)-(\d+)$/)
-      @total_time = $1.to_i
-      @byoyomi = $2.to_i
-    end
-
-    if (player0.sente)
-      @sente = player0
-      @gote = player1
-    else
-      @sente = player1
-      @gote = player0
-    end
-    @current_player = @sente
-    @next_player = @gote
-
-    @sente.game = self
-    @gote.game = self
-
-    @last_move = ""
-    @current_turn = 0
-
-    @sente.status = "agree_waiting"
-    @gote.status = "agree_waiting"
-    
-    @id = sprintf("%s+%s+%s+%s+%s", 
-                  LEAGUE.event, @game_name, @sente.name, @gote.name, issue_current_time)
-    @logfile = @id + ".csa"
-
-    LEAGUE.games[@id] = self
-
-    log_message(sprintf("game created %s", @id))
-
-    @board = Board::new
-    @board.initial
-    @start_time = nil
-    @fh = nil
-    @result = nil
-
-    propose
-  end
-  attr_accessor :game_name, :total_time, :byoyomi, :sente, :gote, :id, :board, :current_player, :next_player, :fh, :monitors
-  attr_accessor :last_move, :current_turn
-  attr_reader   :result
-
-  def rated?
-    @sente.rated? && @gote.rated?
-  end
-
-  def monitoron(monitor)
-    @monitors.delete(monitor)
-    @monitors.push(monitor)
-  end
-
-  def monitoroff(monitor)
-    @monitors.delete(monitor)
-  end
-
-  def reject(rejector)
-    @sente.write_safe(sprintf("REJECT:%s by %s\n", @id, rejector))
-    @gote.write_safe(sprintf("REJECT:%s by %s\n", @id, rejector))
-    finish
-  end
-
-  def kill(killer)
-    if ((@sente.status == "agree_waiting") || (@sente.status == "start_waiting"))
-      reject(killer.name)
-    elsif (@current_player == killer)
-      abnormal_lose()
-      finish
-    end
-  end
-
-  def finish
-    log_message(sprintf("game finished %s", @id))
-    @fh.printf("'$END_TIME:%s\n", Time::new.strftime("%Y/%m/%d %H:%M:%S"))    
-    @fh.close
-
-    @sente.game = nil
-    @gote.game = nil
-    @sente.status = "connected"
-    @gote.status = "connected"
-
-    if (@current_player.protocol == "CSA")
-      @current_player.finish
-    end
-    if (@next_player.protocol == "CSA")
-      @next_player.finish
-    end
-    @monitors = Array::new
-    @sente = nil
-    @gote = nil
-    @current_player = nil
-    @next_player = nil
-    LEAGUE.games.delete(@id)
-  end
-
-  def handle_one_move(str, player)
-    finish_flag = true
-    if (@current_player == player)
-      @end_time = Time::new
-      t = (@end_time - @start_time).floor
-      t = Least_Time_Per_Move if (t < Least_Time_Per_Move)
-      
-      move_status = nil
-      if ((@current_player.mytime - t <= -@byoyomi) && ((@total_time > 0) || (@byoyomi > 0)))
-        status = :timeout
-      elsif (str == :timeout)
-        return false            # time isn't expired. players aren't swapped. continue game
-      else
-        @current_player.mytime = @current_player.mytime - t
-        if (@current_player.mytime < 0)
-          @current_player.mytime = 0
-        end
-
-#        begin
-          move_status = @board.handle_one_move(str, @sente == @current_player)
-#        rescue
-#          log_error("handle_one_move raise exception for #{str}")
-#          move_status = :illegal
-#        end
-
-        if ((move_status == :illegal) || (move_status == :uchifuzme) || (move_status == :oute_kaihimore))
-          @fh.printf("'ILLEGAL_MOVE(%s)\n", str)
-        else
-          if ((move_status == :normal) || (move_status == :outori) || (move_status == :sennichite) || (move_status == :oute_sennichite))
-            @sente.write_safe(sprintf("%s,T%d\n", str, t))
-            @gote.write_safe(sprintf("%s,T%d\n", str, t))
-            @fh.printf("%s\nT%d\n", str, t)
-            @last_move = sprintf("%s,T%d", str, t)
-            @current_turn = @current_turn + 1
-          end
-
-          @monitors.each do |monitor|
-            monitor.write_safe(show.gsub(/^/, "##[MONITOR][#{@id}] "))
-            monitor.write_safe(sprintf("##[MONITOR][%s] +OK\n", @id))
-          end
-        end
-      end
-
-      if (@next_player.status != "game") # rival is logout or disconnected
-        abnormal_win()
-      elsif (status == :timeout)
-        timeout_lose()
-      elsif (move_status == :illegal)
-        illegal_lose()
-      elsif (move_status == :kachi_win)
-        kachi_win()
-      elsif (move_status == :kachi_lose)
-        kachi_lose()
-      elsif (move_status == :toryo)
-        toryo_lose()
-      elsif (move_status == :outori)
-        outori_win()
-      elsif (move_status == :sennichite)
-        sennichite_draw()
-      elsif (move_status == :oute_sennichite)
-        oute_sennichite_lose()
-      elsif (move_status == :uchifuzume)
-        uchifuzume_lose()
-      elsif (move_status == :oute_kaihimore)
-        oute_kaihimore_lose()
-      else
-        finish_flag = false
-      end
-      finish() if finish_flag
-      (@current_player, @next_player) = [@next_player, @current_player]
-      @start_time = Time::new
-      return finish_flag
-    end
-  end
-
-  def abnormal_win
-    @current_player.status = "connected"
-    @next_player.status = "connected"
-    @current_player.write_safe("%TORYO\n#RESIGN\n#WIN\n")
-    @next_player.write_safe("%TORYO\n#RESIGN\n#LOSE\n")
-    @fh.printf("%%TORYO\n")
-    @fh.print(@board.to_s.gsub(/^/, "\'"))
-    @fh.printf("'summary:abnormal:%s win:%s lose\n", @current_player.name, @next_player.name)
-    @result = GameResultWin.new(@current_player, @next_player)
-    @fh.printf("'rating:#{@result.to_s}\n") if rated?
-    @monitors.each do |monitor|
-      monitor.write_safe(sprintf("##[MONITOR][%s] %%TORYO\n", @id))
-    end
-  end
-
-  def abnormal_lose
-    @current_player.status = "connected"
-    @next_player.status = "connected"
-    @current_player.write_safe("%TORYO\n#RESIGN\n#LOSE\n")
-    @next_player.write_safe("%TORYO\n#RESIGN\n#WIN\n")
-    @fh.printf("%%TORYO\n")
-    @fh.print(@board.to_s.gsub(/^/, "\'"))
-    @fh.printf("'summary:abnormal:%s lose:%s win\n", @current_player.name, @next_player.name)
-    @result = GameResultWin.new(@next_player, @current_player)
-    @fh.printf("'rating:#{@result.to_s}\n") if rated?
-    @monitors.each do |monitor|
-      monitor.write_safe(sprintf("##[MONITOR][%s] %%TORYO\n", @id))
-    end
-  end
-
-  def sennichite_draw
-    @current_player.status = "connected"
-    @next_player.status = "connected"
-    @current_player.write_safe("#SENNICHITE\n#DRAW\n")
-    @next_player.write_safe("#SENNICHITE\n#DRAW\n")
-    @fh.print(@board.to_s.gsub(/^/, "\'"))
-    @fh.printf("'summary:sennichite:%s draw:%s draw\n", @current_player.name, @next_player.name)
-    @result = GameResultDraw.new(@current_player, @next_player)
-    @fh.printf("'rating:#{@result.to_s}\n") if rated?
-    @monitors.each do |monitor|
-      monitor.write_safe(sprintf("##[MONITOR][%s] #SENNICHITE\n", @id))
-    end
-  end
-
-  def oute_sennichite_lose
-    @current_player.status = "connected"
-    @next_player.status = "connected"
-    @current_player.write_safe("#OUTE_SENNICHITE\n#LOSE\n")
-    @next_player.write_safe("#OUTE_SENNICHITE\n#WIN\n")
-    @fh.print(@board.to_s.gsub(/^/, "\'"))
-    @fh.printf("'summary:oute_sennichite:%s lose:%s win\n", @current_player.name, @next_player.name)
-    @result = GameResultWin.new(@next_player, @current_player)
-    @fh.printf("'rating:#{@result.to_s}\n") if rated?
-    @monitors.each do |monitor|
-      monitor.write_safe(sprintf("##[MONITOR][%s] #OUTE_SENNICHITE\n", @id))
-    end
-  end
-
-  def illegal_lose
-    @current_player.status = "connected"
-    @next_player.status = "connected"
-    @current_player.write_safe("#ILLEGAL_MOVE\n#LOSE\n")
-    @next_player.write_safe("#ILLEGAL_MOVE\n#WIN\n")
-    @fh.print(@board.to_s.gsub(/^/, "\'"))
-    @fh.printf("'summary:illegal move:%s lose:%s win\n", @current_player.name, @next_player.name)
-    @result = GameResultWin.new(@next_player, @current_player)
-    @fh.printf("'rating:#{@result.to_s}\n") if rated?
-    @monitors.each do |monitor|
-      monitor.write_safe(sprintf("##[MONITOR][%s] #ILLEGAL_MOVE\n", @id))
-    end
-  end
-
-  def uchifuzume_lose
-    @current_player.status = "connected"
-    @next_player.status = "connected"
-    @current_player.write_safe("#ILLEGAL_MOVE\n#LOSE\n")
-    @next_player.write_safe("#ILLEGAL_MOVE\n#WIN\n")
-    @fh.print(@board.to_s.gsub(/^/, "\'"))
-    @fh.printf("'summary:uchifuzume:%s lose:%s win\n", @current_player.name, @next_player.name)
-    @result = GameResultWin.new(@next_player, @current_player)
-    @fh.printf("'rating:#{@result.to_s}\n") if rated?
-    @monitors.each do |monitor|
-      monitor.write_safe(sprintf("##[MONITOR][%s] #ILLEGAL_MOVE\n", @id))
-    end
-  end
-
-  def oute_kaihimore_lose
-    @current_player.status = "connected"
-    @next_player.status = "connected"
-    @current_player.write_safe("#ILLEGAL_MOVE\n#LOSE\n")
-    @next_player.write_safe("#ILLEGAL_MOVE\n#WIN\n")
-    @fh.print(@board.to_s.gsub(/^/, "\'"))
-    @fh.printf("'summary:oute_kaihimore:%s lose:%s win\n", @current_player.name, @next_player.name)
-    @result = GameResultWin.new(@next_player, @current_player)
-    @fh.printf("'rating:#{@result.to_s}\n") if rated?
-    @monitors.each do |monitor|
-      monitor.write_safe(sprintf("##[MONITOR][%s] #ILLEGAL_MOVE\n", @id))
-    end
-  end
-
-  def timeout_lose
-    @current_player.status = "connected"
-    @next_player.status = "connected"
-    @current_player.write_safe("#TIME_UP\n#LOSE\n")
-    @next_player.write_safe("#TIME_UP\n#WIN\n")
-    @fh.print(@board.to_s.gsub(/^/, "\'"))
-    @fh.printf("'summary:time up:%s lose:%s win\n", @current_player.name, @next_player.name)
-    @result = GameResultWin.new(@next_player, @current_player)
-    @fh.printf("'rating:#{@result.to_s}\n") if rated?
-    @monitors.each do |monitor|
-      monitor.write_safe(sprintf("##[MONITOR][%s] #TIME_UP\n", @id))
-    end
-  end
-
-  def kachi_win
-    @current_player.status = "connected"
-    @next_player.status = "connected"
-    @current_player.write_safe("%KACHI\n#JISHOGI\n#WIN\n")
-    @next_player.write_safe("%KACHI\n#JISHOGI\n#LOSE\n")
-    @fh.printf("%%KACHI\n")
-    @fh.print(@board.to_s.gsub(/^/, "\'"))
-    @fh.printf("'summary:kachi:%s win:%s lose\n", @current_player.name, @next_player.name)
-    @result = GameResultWin.new(@current_player, @next_player)
-    @fh.printf("'rating:#{@result.to_s}\n") if rated?
-    @monitors.each do |monitor|
-      monitor.write_safe(sprintf("##[MONITOR][%s] %%KACHI\n", @id))
-    end
-  end
-
-  def kachi_lose
-    @current_player.status = "connected"
-    @next_player.status = "connected"
-    @current_player.write_safe("%KACHI\n#ILLEGAL_MOVE\n#LOSE\n")
-    @next_player.write_safe("%KACHI\n#ILLEGAL_MOVE\n#WIN\n")
-    @fh.printf("%%KACHI\n")
-    @fh.print(@board.to_s.gsub(/^/, "\'"))
-    @fh.printf("'summary:illegal kachi:%s lose:%s win\n", @current_player.name, @next_player.name)
-    @result = GameResultWin.new(@next_player, @current_player)
-    @fh.printf("'rating:#{@result.to_s}\n") if rated?
-    @monitors.each do |monitor|
-      monitor.write_safe(sprintf("##[MONITOR][%s] %%KACHI\n", @id))
-    end
-  end
-
-  def toryo_lose
-    @current_player.status = "connected"
-    @next_player.status = "connected"
-    @current_player.write_safe("%TORYO\n#RESIGN\n#LOSE\n")
-    @next_player.write_safe("%TORYO\n#RESIGN\n#WIN\n")
-    @fh.printf("%%TORYO\n")
-    @fh.print(@board.to_s.gsub(/^/, "\'"))
-    @fh.printf("'summary:toryo:%s lose:%s win\n", @current_player.name, @next_player.name)
-    @result = GameResultWin.new(@next_player, @current_player)
-    @fh.printf("'rating:#{@result.to_s}\n") if rated?
-    @monitors.each do |monitor|
-      monitor.write_safe(sprintf("##[MONITOR][%s] %%TORYO\n", @id))
-    end
-  end
-
-  def outori_win
-    @current_player.status = "connected"
-    @next_player.status = "connected"
-    @current_player.write_safe("#ILLEGAL_MOVE\n#WIN\n")
-    @next_player.write_safe("#ILLEGAL_MOVE\n#LOSE\n")
-    @fh.print(@board.to_s.gsub(/^/, "\'"))
-    @fh.printf("'summary:outori:%s win:%s lose\n", @current_player.name, @next_player.name)
-    @result = GameResultWin.new(@current_player, @next_player)
-    @fh.printf("'rating:#{@result.to_s}\n") if rated?
-    @monitors.each do |monitor|
-      monitor.write_safe(sprintf("##[MONITOR][%s] #ILLEGAL_MOVE\n", @id))
-    end
-  end
-
-  def start
-    log_message(sprintf("game started %s", @id))
-    @sente.write_safe(sprintf("START:%s\n", @id))
-    @gote.write_safe(sprintf("START:%s\n", @id))
-    @sente.mytime = @total_time
-    @gote.mytime = @total_time
-    @start_time = Time::new
-  end
-
-  def propose
-    begin
-      @fh = open(@logfile, "w")
-      @fh.sync = true
-
-      @fh.printf("V2\n")
-      @fh.printf("N+%s\n", @sente.name)
-      @fh.printf("N-%s\n", @gote.name)
-      @fh.printf("$EVENT:%s\n", @id)
-
-      @sente.write_safe(propose_message("+"))
-      @gote.write_safe(propose_message("-"))
-
-      @fh.printf("$START_TIME:%s\n", Time::new.strftime("%Y/%m/%d %H:%M:%S"))
-      @fh.print <<EOM
-P1-KY-KE-GI-KI-OU-KI-GI-KE-KY
-P2 * -HI *  *  *  *  * -KA * 
-P3-FU-FU-FU-FU-FU-FU-FU-FU-FU
-P4 *  *  *  *  *  *  *  *  * 
-P5 *  *  *  *  *  *  *  *  * 
-P6 *  *  *  *  *  *  *  *  * 
-P7+FU+FU+FU+FU+FU+FU+FU+FU+FU
-P8 * +KA *  *  *  *  * +HI * 
-P9+KY+KE+GI+KI+OU+KI+GI+KE+KY
-+
-EOM
-    end
-  end
+#! /usr/bin/ruby1.9.1
+# $Id$
+#
+# Author:: NABEYA Kenichi, Daigo Moriwaki
+# Homepage:: http://sourceforge.jp/projects/shogi-server/
+#
+#--
+# Copyright (C) 2004 NABEYA Kenichi (aka nanami@2ch)
+# Copyright (C) 2007-2012 Daigo Moriwaki (daigo at debian dot org)
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#++
+#
+#
 
-  def show()
-    str0 = <<EOM
-BEGIN Game_Summary
-Protocol_Version:1.1
-Protocol_Mode:Server
-Format:Shogi 1.0
-Declaration:Jishogi 1.1
-Game_ID:#{@id}
-Name+:#{@sente.name}
-Name-:#{@gote.name}
-Rematch_On_Draw:NO
-To_Move:+
-BEGIN Time
-Time_Unit:1sec
-Total_Time:#{@total_time}
-Byoyomi:#{@byoyomi}
-Least_Time_Per_Move:#{Least_Time_Per_Move}
-Remaining_Time+:#{@sente.mytime}
-Remaining_Time-:#{@gote.mytime}
-Last_Move:#{@last_move}
-Current_Turn:#{@current_turn}
-END Time
-BEGIN Position
-EOM
+$topdir = nil
+$league = nil
+$logger = nil
+$config = nil
+$:.unshift(File.dirname(File.expand_path(__FILE__)))
+require 'shogi_server'
+require 'shogi_server/config'
+require 'shogi_server/util'
+require 'shogi_server/league/floodgate_thread.rb'
+require 'tempfile'
 
-    str1 = <<EOM
-END Position
-END Game_Summary
-EOM
+#################################################
+# MAIN
+#
 
-    return str0 + @board.to_s + str1
-  end
+ShogiServer.reload
 
-  def propose_message(sg_flag)
-    str = <<EOM
-BEGIN Game_Summary
-Protocol_Version:1.1
-Protocol_Mode:Server
-Format:Shogi 1.0
-Declaration:Jishogi 1.1
-Game_ID:#{@id}
-Name+:#{@sente.name}
-Name-:#{@gote.name}
-Your_Turn:#{sg_flag}
-Rematch_On_Draw:NO
-To_Move:+
-BEGIN Time
-Time_Unit:1sec
-Total_Time:#{@total_time}
-Byoyomi:#{@byoyomi}
-Least_Time_Per_Move:#{Least_Time_Per_Move}
-END Time
-BEGIN Position
-P1-KY-KE-GI-KI-OU-KI-GI-KE-KY
-P2 * -HI *  *  *  *  * -KA * 
-P3-FU-FU-FU-FU-FU-FU-FU-FU-FU
-P4 *  *  *  *  *  *  *  *  * 
-P5 *  *  *  *  *  *  *  *  * 
-P6 *  *  *  *  *  *  *  *  * 
-P7+FU+FU+FU+FU+FU+FU+FU+FU+FU
-P8 * +KA *  *  *  *  * +HI * 
-P9+KY+KE+GI+KI+OU+KI+GI+KE+KY
-P+
-P-
-+
-END Position
-END Game_Summary
-EOM
-    return str
-  end
-  
-  private
-  
-  def issue_current_time
-    time = Time::new.strftime("%Y%m%d%H%M%S").to_i
-    @@mutex.synchronize do
-      while time <= @@time do
-        time += 1
-      end
-      @@time = time
-    end
+# Return
+#   - a received string
+#   - :timeout
+#   - :exception
+#   - nil when a socket is closed
+#
+def gets_safe(socket, timeout=nil)
+  if r = select([socket], nil, nil, timeout)
+    return r[0].first.gets
+  else
+    return :timeout
   end
+rescue Exception => ex
+  log_error("gets_safe: #{ex.class}: #{ex.message}\n\t#{ex.backtrace[0]}")
+  return :exception
 end
 
-#################################################
-# MAIN
-#
-
 def usage
     print <<EOM
 NAME
-       shogi-server - server for CSA server protocol
+        shogi-server - server for CSA server protocol
 
 SYNOPSIS
-       shogi-server event_name port_number
+        shogi-server [OPTIONS] event_name port_number
 
 DESCRIPTION
-       server for CSA server protocol
+        server for CSA server protocol
 
 OPTIONS
-       --pid-file file
-               specify filename for logging process ID
+        event_name
+                a prefix of record files.
+        port_number
+                a port number for the server to listen. 
+                4081 is often used.
+        --pid-file file
+                a file path in which a process ID will be written.
+                Use with --daemon option.
+        --daemon dir
+                run as a daemon. Log files will be put in dir.
+        --floodgate-games game_A[,...]
+                enable Floodgate with various game names (separated by a comma)
+        --player-log-dir dir
+                enable to log network messages for players. Log files
+                will be put in the dir.
+
+EXAMPLES
+
+        1. % ./shogi-server test 4081
+           Run the shogi-server. Then clients can connect to port#4081.
+           The server output logs to the stdout.
+
+        2. % ./shogi-server --daemon . --pid-file ./shogi-server.pid \
+                            --player-log-dir ./player-logs \
+                            test 4081
+           Run the shogi-server as a daemon. The server outputs regular logs
+           to shogi-server.log located in the current directory and network 
+           messages in ./player-logs directory.
+
+        3. % ./shogi-server --daemon . --pid-file ./shogi-server.pid \
+                            --player-log-dir ./player-logs \
+                            --floodgate-games floodgate-900-0,floodgate-3600-0 \
+                            test 4081
+           Run the shogi-server with two groups of Floodgate games.
+           Configuration files allow you to schedule starting times. Consult  
+           floodgate-0-240.conf.sample or shogi_server/league/floodgate.rb 
+           for format details.
+
+FLOODGATE SCHEDULE CONFIGURATIONS
+
+           You need to set starting times of floodgate groups in
+           configuration files under the top directory. Each floodgate 
+            group requires a corresponding configuration file named
+           "<game_name>.conf". The file will be re-read once just after a
+           game starts. 
+           
+           For example, a floodgate-3600-30 game group requires
+           floodgate-3600-30.conf.  However, for floodgate-900-0 and
+           floodgate-3600-0, which were default enabled in previous
+           versions, configuration files are optional if you are happy with
+           default time settings.
+           File format is:
+             Line format: 
+               # This is a comment line
+               DoW Time
+               ...
+             where
+               DoW := "Sun" | "Mon" | "Tue" | "Wed" | "Thu" | "Fri" | "Sat" |
+                      "Sunday" | "Monday" | "Tuesday" | "Wednesday" | "Thursday" |
+                      "Friday" | "Saturday" 
+               Time := HH:MM
+            
+             For example,
+               Sat 13:00
+               Sat 22:00
+               Sun 13:00
+
+            PAREMETER SETTING
+
+            In addition, this configuration file allows to set parameters
+            for the specific Floodaget group. A list of parameters is the
+            following:
+
+            * pairing_factory:
+              Specifies a factory function name generating a pairing
+              method which will be used in a specific Floodgate game.
+              ex. set pairing_factory floodgate_zyunisen
+            * sacrifice:
+              Specifies a sacrificed player.
+              ex. set sacrifice gps500+e293220e3f8a3e59f79f6b0efffaa931
 
 LICENSE
-       this file is distributed under GPL version2 and might be compiled by Exerb
+        GPL versoin 2 or later
 
 SEE ALSO
 
-RELEASE
-       #{Release}
-
 REVISION
-       #{Revision}
+        #{ShogiServer::Revision}
+
 EOM
 end
 
+
+def log_debug(str)
+  $logger.debug(str)
+end
+
 def log_message(str)
-  printf("%s message: %s\n", Time::new.to_s, str)
+  $logger.info(str)
+end
+def log_info(str)
+  log_message(str)
 end
 
 def log_warning(str)
-  printf("%s warning: %s\n", Time::new.to_s, str)
+  $logger.warn(str)
 end
 
 def log_error(str)
-  printf("%s error: %s\n", Time::new.to_s, str)
+  $logger.error(str)
 end
 
 
+# Parse command line options. Return a hash containing the option strings
+# where a key is the option name without the first two slashes. For example,
+# {"pid-file" => "foo.pid"}.
+#
 def parse_command_line
   options = Hash::new
-  parser = GetoptLong.new
-  parser.ordering = GetoptLong::REQUIRE_ORDER
-  parser.set_options(
-                     ["--pid-file", GetoptLong::REQUIRED_ARGUMENT])
-
+  parser = GetoptLong.new(
+    ["--daemon",            GetoptLong::REQUIRED_ARGUMENT],
+    ["--floodgate-games",   GetoptLong::REQUIRED_ARGUMENT],
+    ["--pid-file",          GetoptLong::REQUIRED_ARGUMENT],
+    ["--player-log-dir",    GetoptLong::REQUIRED_ARGUMENT])
   parser.quiet = true
   begin
     parser.each_option do |name, arg|
@@ -1837,140 +208,271 @@ def parse_command_line
   return options
 end
 
-def good_game_name?(str)
-  if ((str =~ /^(.+)-\d+-\d+$/) &&
-      (good_identifier?($1)))
-    return true
-  else
-    return false
+# Check command line options.
+# If any of them is invalid, exit the process.
+#
+def check_command_line
+  if (ARGV.length != 2)
+    usage
+    exit 2
   end
-end
 
-# TODO This is also checked by good_game_name?().
-def good_identifier?(str)
-  if str =~ /\A[\w\d_@\-\.]{1,#{Max_Identifier_Length}}\z/
-    return true
-  elsif str =~ /\A[\w\d_@\-\.]{1,#{Max_Identifier_Length}},[\w\d_@\-\.]{1,#{Max_Identifier_Length}}\z/
-    return true
-  else
-    return false
+  if $options["daemon"]
+    $options["daemon"] = File.expand_path($options["daemon"], File.dirname(__FILE__))
+    unless is_writable_dir? $options["daemon"]
+      usage
+      $stderr.puts "Can not create a file in the daemon directory: %s" % [$options["daemon"]]
+      exit 5
+    end
+  end
+
+  $topdir = $options["daemon"] || File.expand_path(File.dirname(__FILE__))
+
+  if $options["player-log-dir"]
+    $options["player-log-dir"] = File.expand_path($options["player-log-dir"], $topdir)
+    unless is_writable_dir?($options["player-log-dir"])
+      usage
+      $stderr.puts "Can not write a file in the player log dir: %s" % [$options["player-log-dir"]]
+      exit 3
+    end 
+  end
+
+  if $options["pid-file"] 
+    $options["pid-file"] = File.expand_path($options["pid-file"], $topdir)
+    unless ShogiServer::is_writable_file? $options["pid-file"]
+      usage
+      $stderr.puts "Can not create the pid file: %s" % [$options["pid-file"]]
+      exit 4
+    end
+  end
+
+  if $options["floodgate-games"]
+    names = $options["floodgate-games"].split(",")
+    new_names = 
+      names.select do |name|
+        ShogiServer::League::Floodgate::game_name?(name)
+      end
+    if names.size != new_names.size
+      $stderr.puts "Found a wrong Floodgate game: %s" % [names.join(",")]
+      exit 6
+    end
+    $options["floodgate-games"] = new_names
+  end
+
+  if $options["floodgate-history"]
+    $stderr.puts "WARNING: --floodgate-history has been deprecated."
+    $options["floodgate-history"] = nil
   end
 end
 
-def good_login?(str)
-  tokens = str.split
-  if (((tokens.length == 3) || ((tokens.length == 4) && tokens[3] == "x1")) &&
-      (tokens[0] == "LOGIN") &&
-      (good_identifier?(tokens[1])))
-    return true
-  else
+# See if a file can be created in the directory.
+# Return true if a file is writable in the directory, otherwise false.
+#
+def is_writable_dir?(dir)
+  unless File.directory? dir
     return false
   end
+
+  result = true
+
+  begin
+    temp_file = Tempfile.new("dummy-shogi-server", dir)
+    temp_file.close true
+  rescue
+    result = false
+  end
+
+  return result
 end
 
-def  write_pid_file(file)
+def write_pid_file(file)
   open(file, "w") do |fh|
-    fh.print Process::pid, "\n"
+    fh.puts "#{$$}"
   end
 end
 
 def mutex_watchdog(mutex, sec)
+  sec = 1 if sec < 1
+  queue = []
   while true
+    if mutex.try_lock
+      queue.clear
+      mutex.unlock
+    else
+      queue.push(Object.new)
+      if queue.size > sec
+        # timeout
+        log_error("mutex watchdog timeout: %d sec" % [sec])
+        queue.clear
+      end
+    end
+    sleep(1)
+  end
+end
+
+def login_loop(client)
+  player = login = nil
+  while r = select([client], nil, nil, ShogiServer::Login_Time) do
+    str = nil
     begin
-      timeout(sec) do
-        begin
-          mutex.lock
-        ensure
-          mutex.unlock
+      break unless str = r[0].first.gets
+    rescue Exception => ex
+      # It is posssible that the socket causes an error (ex. Errno::ECONNRESET)
+      log_error("login_loop: #{ex.class}: #{ex.message}\n\t#{ex.backtrace[0]}")
+      break
+    end
+    $mutex.lock # guards $league
+    begin
+      str =~ /([\r\n]*)$/
+      eol = $1
+      if (ShogiServer::Login::good_login?(str))
+        player = ShogiServer::Player::new(str, client, eol)
+        login  = ShogiServer::Login::factory(str, player)
+        if (current_player = $league.find(player.name))
+          if (current_player.password == player.password &&
+              current_player.status != "game")
+            log_message(sprintf("user %s login forcely", player.name))
+            current_player.kill
+          else
+            login.incorrect_duplicated_player(str)
+            player = nil
+            break
+          end
         end
+        $league.add(player)
+        break
+      else
+        client.write("LOGIN:incorrect" + eol)
+        client.write("type 'LOGIN name password' or 'LOGIN name password x1'" + eol) if (str.split.length >= 4)
       end
-      sleep(sec)
-    rescue TimeoutError
-      log_error("mutex watchdog timeout")
-      exit(1)
+    ensure
+      $mutex.unlock
     end
-  end
+  end                       # login loop
+  return [player, login]
 end
 
-def main
+def setup_logger(log_file)
+  logger = ShogiServer::Logger.new(log_file, 'daily')
+  logger.formatter = ShogiServer::Formatter.new
+  logger.level = $DEBUG ? Logger::DEBUG : Logger::INFO  
+  logger.datetime_format = "%Y-%m-%d %H:%M:%S"
+  return logger
+end
+
+def setup_watchdog_for_giant_lock
   $mutex = Mutex::new
   Thread::start do
     Thread.pass
     mutex_watchdog($mutex, 10)
   end
+end
 
+def main
+  
   $options = parse_command_line
-  if (ARGV.length != 2)
-    usage
-    exit 2
-  end
+  check_command_line
+  $config = ShogiServer::Config.new $options
+
+  $league = ShogiServer::League.new($topdir)
 
-  LEAGUE.event = ARGV.shift
+  $league.event = ARGV.shift
   port = ARGV.shift
 
-  write_pid_file($options["pid-file"]) if ($options["pid-file"])
+  log_file = $options["daemon"] ? File.join($options["daemon"], "shogi-server.log") : STDOUT
+  $logger = setup_logger(log_file)
 
-  server = TCPserver.open(port)
-  log_message("server started")
+  $league.dir = $topdir
 
-  while true
-    Thread::start(server.accept) do |client|
-      Thread.pass
-      client.sync = true
-      player = nil
-      while (str = client.gets_timeout(Login_Time))
-        begin
-          $mutex.lock
-          str =~ /([\r\n]*)$/
-          eol = $1
-          if (good_login?(str))
-            player = Player::new(str, client)
-            if (LEAGUE.players[player.name])
-              if ((LEAGUE.players[player.name].password == player.password) &&
-                  (LEAGUE.players[player.name].status != "game"))
-                log_message(sprintf("user %s login forcely", player.name))
-                LEAGUE.players[player.name].kill
-              else
-                client.write_safe("LOGIN:incorrect" + eol)
-                client.write_safe(sprintf("username %s is already connected%s", player.name, eol)) if (str.split.length >= 4)
-                client.close
-                Thread::exit
-                return
-              end
-            end
-            LEAGUE.add(player)
-            break
-          else
-            client.write_safe("LOGIN:incorrect" + eol)
-            client.write_safe("type 'LOGIN name password' or 'LOGIN name password x1'" + eol) if (str.split.length >= 4)
-          end
-        ensure
-          $mutex.unlock
-        end
-      end                       # login loop
-      if (! player)
-        client.close
-        Thread::exit
-        return
+  config = {}
+  config[:BindAddress] = "0.0.0.0"
+  config[:Port]       = port
+  config[:ServerType] = WEBrick::Daemon if $options["daemon"]
+  config[:Logger]     = $logger
+
+  setup_floodgate = nil
+
+  config[:StartCallback] = Proc.new do
+    srand
+    if $options["pid-file"]
+      write_pid_file($options["pid-file"])
+    end
+    setup_watchdog_for_giant_lock
+    $league.setup_players_database
+    setup_floodgate = ShogiServer::SetupFloodgate.new($options["floodgate-games"])
+    setup_floodgate.start
+  end
+
+  config[:StopCallback] = Proc.new do
+    if $options["pid-file"]
+      FileUtils.rm($options["pid-file"], :force => true)
+    end
+  end
+
+  srand
+  server = WEBrick::GenericServer.new(config)
+  ["INT", "TERM"].each do |signal| 
+    trap(signal) do
+      server.shutdown
+      setup_floodgate.kill
+    end
+  end
+  unless (RUBY_PLATFORM.downcase =~ /mswin|mingw|cygwin|bccwin/)
+    trap("HUP") do
+      Dependencies.clear
+    end
+  end
+  $stderr.puts("server started as a deamon [Revision: #{ShogiServer::Revision}]") if $options["daemon"] 
+  log_message("server started [Revision: #{ShogiServer::Revision}]")
+
+  server.start do |client|
+    begin
+      # client.sync = true # this is already set in WEBrick 
+      client.setsockopt(Socket::SOL_SOCKET, Socket::SO_KEEPALIVE, true)
+        # Keepalive time can be set by /proc/sys/net/ipv4/tcp_keepalive_time
+      player, login = login_loop(client) # loop
+      unless player
+        log_error("Detected a timed out login attempt")
+        next
       end
+
       log_message(sprintf("user %s login", player.name))
-      player.run
+      login.process
+      player.setup_logger($options["player-log-dir"]) if $options["player-log-dir"]
+      player.run(login.csa_1st_str) # loop
+      $mutex.lock
       begin
-        $mutex.lock
         if (player.game)
           player.game.kill(player)
         end
-        player.finish # socket has been closed
-        LEAGUE.delete(player)
+        player.finish
+        $league.delete(player)
         log_message(sprintf("user %s logout", player.name))
       ensure
         $mutex.unlock
       end
+      player.wait_write_thread_finish(1000) # milliseconds
+    rescue Exception => ex
+      log_error("server.start: #{ex.class}: #{ex.message}\n\t#{ex.backtrace[0]}")
     end
   end
 end
 
+
 if ($0 == __FILE__)
-  LEAGUE = League::new
-  main
+  STDOUT.sync = true
+  STDERR.sync = true
+  TCPSocket.do_not_reverse_lookup = true
+  Thread.abort_on_exception = $DEBUG ? true : false
+
+  begin
+    main
+  rescue Exception => ex
+    if $logger
+      log_error("main: #{ex.class}: #{ex.message}\n\t#{ex.backtrace[0]}")
+    else
+      $stderr.puts "main: #{ex.class}: #{ex.message}\n\t#{ex.backtrace[0]}"
+    end
+  end
 end