mirror of
https://github.com/fofolee/uTools-quickcommand.git
synced 2025-06-16 03:07:00 +08:00
102 lines
3.4 KiB
JavaScript
102 lines
3.4 KiB
JavaScript
/*
|
|
* 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):
|
|
* António Afonso (antonio.afonso gmail.com) - port to JavaScript
|
|
* Mark Pilgrim - port to Python
|
|
* Shy Shalom - original C code
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
var CharSetProber = require('./charsetprober');
|
|
var constants = require('./constants');
|
|
var logger = require('./logger');
|
|
|
|
function MultiByteCharSetProber() {
|
|
CharSetProber.apply(this);
|
|
|
|
var self = this;
|
|
|
|
function init() {
|
|
self._mDistributionAnalyzer = null;
|
|
self._mCodingSM = null;
|
|
//self._mLastChar = ["\x00", "\x00"];
|
|
self._mLastChar = "\x00\x00";
|
|
}
|
|
|
|
this.reset = function() {
|
|
MultiByteCharSetProber.prototype.reset.apply(this);
|
|
if( this._mCodingSM ) {
|
|
this._mCodingSM.reset();
|
|
}
|
|
if( this._mDistributionAnalyzer ) {
|
|
this._mDistributionAnalyzer.reset();
|
|
}
|
|
//this._mLastChar = ["\x00", "\x00"];
|
|
this._mLastChar = "\x00\x00";
|
|
}
|
|
|
|
this.getCharsetName = function() {
|
|
}
|
|
|
|
this.feed = function(aBuf) {
|
|
var aLen = aBuf.length;
|
|
for( var i = 0; i < aLen; i++ ) {
|
|
var codingState = this._mCodingSM.nextState(aBuf[i]);
|
|
if( codingState == constants.error ) {
|
|
logger.log(this.getCharsetName() + " prober hit error at byte " + i + "\n");
|
|
this._mState = constants.notMe;
|
|
break;
|
|
} else if( codingState == constants.itsMe ) {
|
|
this._mState = constants.foundIt;
|
|
break;
|
|
} else if( codingState == constants.start ) {
|
|
var charLen = this._mCodingSM.getCurrentCharLen();
|
|
if( i == 0 ) {
|
|
this._mLastChar[1] = aBuf[0];
|
|
this._mDistributionAnalyzer.feed(this._mLastChar, charLen);
|
|
} else {
|
|
this._mDistributionAnalyzer.feed(aBuf.slice(i-1,i+1), charLen);
|
|
}
|
|
}
|
|
}
|
|
|
|
this._mLastChar[0] = aBuf[aLen - 1];
|
|
|
|
if( this.getState() == constants.detecting ) {
|
|
if( this._mDistributionAnalyzer.gotEnoughData() &&
|
|
this.getConfidence() > constants.SHORTCUT_THRESHOLD ) {
|
|
this._mState = constants.foundIt;
|
|
}
|
|
}
|
|
|
|
return this.getState();
|
|
}
|
|
|
|
this.getConfidence = function() {
|
|
return this._mDistributionAnalyzer.getConfidence();
|
|
}
|
|
}
|
|
MultiByteCharSetProber.prototype = new CharSetProber();
|
|
|
|
module.exports = MultiByteCharSetProber
|