JezK
Edit File: mbcharsetprober.rb
######################## BEGIN LICENSE BLOCK ######################## # The Original Code is Mozilla Universal charset detector code. # # The Initial Developer of the Original Code is # Netscape Communications Corporation. # Portions created by the Initial Developer are Copyright (C) 2001 # the Initial Developer. All Rights Reserved. # # Contributor(s): # Jeff Hodges - port to Ruby # Mark Pilgrim - port to Python # Shy Shalom - original C code # Proofpoint, Inc. # # This library is free software; you can redistribute it and/or # modify it under the terms of the GNU Lesser General Public # License as published by the Free Software Foundation; either # version 2.1 of the License, or (at your option) any later version. # # This library 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 # Lesser General Public License for more details. # # You should have received a copy of the GNU Lesser General Public # License along with this library; if not, write to the Free Software # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA # 02110-1301 USA ######################### END LICENSE BLOCK ######################### module CharDet class MultiByteCharSetProber < CharSetProber def initialize super @distributionAnalyzer = nil @codingSM = nil @lastChar = "\x00\x00" end def reset super if @codingSM @codingSM.reset() end if @distributionAnalyzer @distributionAnalyzer.reset() end @lastChar = "\x00\x00" end def get_charset_name end def feed(aBuf) aLen = aBuf.length for i in (0...aLen) codingState = @codingSM.next_state(aBuf[i, 1]) if codingState == EError $stderr << "#{get_charset_name} prober hit error at byte #{i}\n" if $debug @state = ENotMe break elsif codingState == EItsMe @state = EFoundIt break elsif codingState == EStart charLen = @codingSM.get_current_charlen() if i == 0 @lastChar[1] = aBuf[0, 1] @distributionAnalyzer.feed(@lastChar, charLen) else @distributionAnalyzer.feed(aBuf[i-1, 2], charLen) end end end @lastChar[0] = aBuf[aLen-1, 1] if get_state() == EDetecting if @distributionAnalyzer.got_enough_data() and (get_confidence() > SHORTCUT_THRESHOLD) @state = EFoundIt end end return get_state() end def get_confidence return @distributionAnalyzer.get_confidence() end end end