escprober.js
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/*
* 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
*/
!function(jschardet) {
jschardet.EscCharSetProber = function() {
jschardet.CharSetProber.apply(this);
var self = this;
function init() {
self._mCodingSM = [
new jschardet.CodingStateMachine(jschardet.HZSMModel),
new jschardet.CodingStateMachine(jschardet.ISO2022CNSMModel),
new jschardet.CodingStateMachine(jschardet.ISO2022JPSMModel),
new jschardet.CodingStateMachine(jschardet.ISO2022KRSMModel)
];
self.reset();
}
this.reset = function() {
jschardet.EscCharSetProber.prototype.reset.apply(this);
for( var i = 0, codingSM; codingSM = this._mCodingSM[i]; i++ ) {
if( !codingSM ) continue;
codingSM.active = true;
codingSM.reset();
}
this._mActiveSM = self._mCodingSM.length;
this._mDetectedCharset = null;
}
this.getCharsetName = function() {
return this._mDetectedCharset;
}
this.getConfidence = function() {
if( this._mDetectedCharset ) {
return 0.99;
} else {
return 0.00;
}
}
this.feed = function(aBuf) {
for( var i = 0, c; i < aBuf.length; i++ ) {
c = aBuf[i];
for( var j = 0, codingSM; codingSM = this._mCodingSM[j]; j++ ) {
if( !codingSM || !codingSM.active ) continue;
var codingState = codingSM.nextState(c);
if( codingState == jschardet.Constants.error ) {
codingSM.active = false;
this._mActiveSM--;
if( this._mActiveSM <= 0 ) {
this._mState = jschardet.Constants.notMe;
return this.getState();
}
} else if( codingState == jschardet.Constants.itsMe ) {
this._mState = jschardet.Constants.foundIt;
this._mDetectedCharset = codingSM.getCodingStateMachine();
return this.getState();
}
}
}
return this.getState();
}
init();
}
jschardet.EscCharSetProber.prototype = new jschardet.CharSetProber();
}(require('./init'));