90 lines
2.7 KiB
Ruby
Executable File
90 lines
2.7 KiB
Ruby
Executable File
######################## BEGIN LICENSE BLOCK ########################
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# The Original Code is Mozilla Universal charset detector code.
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#
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# The Initial Developer of the Original Code is
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# Netscape Communications Corporation.
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# Portions created by the Initial Developer are Copyright (C) 2001
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# the Initial Developer. All Rights Reserved.
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#
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# Contributor(s):
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# Jeff Hodges - port to Ruby
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# Mark Pilgrim - port to Python
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# Shy Shalom - original C code
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# Proofpoint, Inc.
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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# 02110-1301 USA
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######################### END LICENSE BLOCK #########################
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module CharDet
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class MultiByteCharSetProber < CharSetProber
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def initialize
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super
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@_mDistributionAnalyzer = nil
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@_mCodingSM = nil
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@_mLastChar = "\x00\x00"
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end
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def reset
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super
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if @_mCodingSM
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@_mCodingSM.reset()
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end
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if @_mDistributionAnalyzer
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@_mDistributionAnalyzer.reset()
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end
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@_mLastChar = "\x00\x00"
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end
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def get_charset_name
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end
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def feed(aBuf)
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aLen = aBuf.length
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for i in (0...aLen)
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codingState = @_mCodingSM.next_state(aBuf[i..i])
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if codingState == EError
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$stderr << "#{get_charset_name} prober hit error at byte #{i}\n" if $debug
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@_mState = ENotMe
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break
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elsif codingState == EItsMe
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@_mState = EFoundIt
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break
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elsif codingState == EStart
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charLen = @_mCodingSM.get_current_charlen()
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if i == 0
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@_mLastChar[1] = aBuf[0..0]
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@_mDistributionAnalyzer.feed(@_mLastChar, charLen)
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else
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@_mDistributionAnalyzer.feed(aBuf[i-1...i+1], charLen)
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end
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end
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end
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@_mLastChar[0] = aBuf[aLen-1..aLen-1]
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if get_state() == EDetecting
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if @_mDistributionAnalyzer.got_enough_data() and (get_confidence() > SHORTCUT_THRESHOLD)
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@_mState = EFoundIt
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end
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end
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return get_state()
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end
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def get_confidence
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return @_mDistributionAnalyzer.get_confidence()
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end
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end
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end
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