whfhost.js

阅读您的文件包然后写出其具体功能(至少要20个字)。尽量不要让站长把时间都花费在为您修正说明上。压缩包解压时不能有密码

		}
		else
		{
			a_Result.strNormalizedOrg = strUpper;
			a_Result.bUpperCase = true;
		}
	}
	this.stemWith = function( a_strWord, a_strSuffix )
	{
		var s = a_strSuffix.split( "," );
		var strSuffix = s[0];
		var bRemoveOnly = ( s[1] == '1' );
		
		var ss = a_strWord.match( "^..+" + strSuffix + "$" );
		if ( ss == null )
			return null;

		var nLenRest = a_strWord.length - strSuffix.length;
		var bAddE = false;
		if ( !bRemoveOnly )
		{
			if ( !this.isVowel( a_strWord.charAt( nLenRest - 1 ) ) )
			{
				if ( a_strWord.charAt( nLenRest - 1 ) == a_strWord.charAt( nLenRest - 2 ) )
					nLenRest--;
				else
					bAddE = true;
			}
		}
		
		var strStem = a_strWord.substr( 0, nLenRest );
		
		if ( strStem.length <= 2 )
			return null;
			
		return strStem;
	}
	this.helStem = function( a_Result )
	{
		var strWord = a_Result.strNormalizedOrg.toLowerCase();

		var nSuffixNum = g_RunesHelSuffixes.length;
		var nStemFound = 0;
		var strStem = null;
		for ( var i = 0; i < nSuffixNum; i++ )
		{
			strStem = this.stemWith( strWord, g_RunesHelSuffixes[i] );
			if ( strStem != null )
			{
				nStemFound = i + 1;
				break;
			}
		}
		if ( strStem == null )
			strStem = strWord;

		a_Result.strHelStem = strStem;
		a_Result.nHelWordShape = a_Result.bUpperCase ? nStemFound * 2 + 1 : nStemFound * 2;
	}
	this.isVowel = function( a_ch )
	{
		return g_RunesVowels.indexOf( a_ch ) >= 0;
	}
	this.isWordBreak = function( a_ch )
	{
		return ( !this.isQuote( a_ch ) && g_RunesWordBreaks.indexOf( a_ch ) >= 0 );
	}
	this.isWhiteSpace = function( a_ch )
	{
		return ( g_RunesWhiteSpaces.indexOf( a_ch ) >= 0 );
	}
	this.isQuote = function( a_ch )
	{
		return ( a_ch == g_RunesQuote );
	}
	this.isAND = function( a_strOp )
	{	return ( a_strOp == "and" );	}
	this.isOR = function( a_strOp )
	{	return ( a_strOp == "or" );		}
	this.isNOT = function( a_strOp )
	{	return ( a_strOp == "not" );	}
	this.isOperator = function( strOp )
	{	if ( strOp == "and" ||
			 strOp == "or" ||
			 strOp == "not" )
			return true;
	}
}

// Runes.js----------------------------------

var	ESNT_AND		= 1;
var	ESNT_OR			= 2;
var	ESNT_NOT		= 3;
var	ESNT_DEFAULT	= 4;
var	ESNT_PHRASE		= 5;

function RunesContext( a_strSrc )
{
	this.strSrc = a_strSrc;
	this.nCur = 0;
	this.bFailed = false;
	this.bNot = false;
	this.nWordIndex = 0;
	
	this.getCurChar = function()
	{
		return this.strSrc.charAt( this.nCur );
	}
	this.getChar = function( i )
	{
		return this.strSrc.charAt( i );
	}
	this.reachEnd = function()
	{
		return this.nCur >= this.strSrc.length;
	}
}

function DolWord( a_strWord, a_nPosition )
{
	this.strWord		= a_strWord;
	this.nPosition		= a_nPosition;
}

function SolNode(){}

function RunesService()
{
	this.langSev = new LanguageService();
	
	this.isOperator = function( a_str, a_nFrom )
	{
		var strOp = this.getWord( a_str, a_nFrom ).toLowerCase();

		if ( this.langSev.isOperator( strOp ) )
			return true;

		return false;
	}
	
	this.getLengthOfWordBreak = function( a_str, a_nFrom )
	{
		var i = a_nFrom, nLen = a_str.length;
		while ( i < nLen && this.langSev.isWordBreak( a_str.charAt( i ) ) )
			i++;
		return i - a_nFrom;
	}

	this.getLengthOfWord = function( a_str, a_nFrom )
	{
		var i = a_nFrom, nLen = a_str.length;
		while ( i < nLen &&
				!this.langSev.isWordBreak( a_str.charAt( i ) ) &&
				!this.langSev.isQuote( a_str.charAt( i ) ) )
			++i;
		return i - a_nFrom;
	}

	this.getWord = function( a_str, a_nFrom )
	{
		var nLen = this.getLengthOfWord( a_str, a_nFrom );
		return a_str.substr( a_nFrom, nLen );
	}
	
	this.getPositionInc = function( a_str, a_nFrom )
	{
		var i = a_nFrom, nLen = a_str.length, nInc = 1;
		while ( i < nLen && this.langSev.isWordBreak( a_str.charAt( i ) ) )
		{
			if ( !this.langSev.isWhiteSpace( a_str.charAt( i ) ) )
				nInc++;

			i++;
		}
		return nInc;
	}

	this.getTerm = function( a_Context, a_Rslt )
	{
		if ( this.langSev.isQuote( a_Context.getCurChar() ) )
		{
			a_Context.nCur++;

			var nLen = this.getLengthOfPhrase( a_Context.strSrc, a_Context.nCur );
			if ( nLen <= 0 )
				return false;

			a_Rslt.eType = ESNT_PHRASE;
			a_Rslt.strTerm = a_Context.strSrc.substr( a_Context.nCur, nLen );
			a_Context.nCur += nLen + 1;
		}
		else
		{
			var nLen = this.getLengthOfDefault( a_Context.strSrc, a_Context.nCur );
			if ( nLen <= 0 )
				return false;

			a_Rslt.eType = ESNT_DEFAULT;
			a_Rslt.strTerm = a_Context.strSrc.substr( a_Context.nCur, nLen );
			a_Context.nCur += nLen;
		}

		return true;
	}

	this.getOperator = function( a_Context, a_Rslt )
	{
		if ( a_Context.reachEnd() )
			return false;

		var strOp = this.getWord( a_Context.strSrc, a_Context.nCur ).toLowerCase();

		if ( this.langSev.isAND( strOp ) )
		{
			a_Rslt.eType = ESNT_AND;
			a_Context.nCur += strOp.length;
		}
		else if ( this.langSev.isOR( strOp ) )
		{
			a_Rslt.eType = ESNT_OR;
			a_Context.nCur += strOp.length;
		}
		else if ( this.langSev.isNOT( strOp ) )
		{
			a_Rslt.eType = ESNT_NOT;
			a_Context.nCur += strOp.length;
		}
		else
		{
			a_Rslt.eType = ESNT_OR;
		}
		
		return true;
	}

	this.getLengthOfPhrase = function( a_str, a_nFrom )
	{
		var i = a_nFrom, nLen = a_str.length;
		while ( i < nLen )
		{
			if ( this.langSev.isQuote( a_str.charAt( i ) ) )
				return i - a_nFrom;
			++i;
		}
		return -1;
	}

	this.getLengthOfDefault = function( a_str, a_nFrom )
	{
		var i = a_nFrom, nLen = a_str.length;
		while ( i < nLen &&
				!this.isOperator( a_str, i ) &&
				!this.langSev.isQuote( a_str.charAt( i ) ) )
		{
			i += this.getLengthOfWord( a_str, i );
			i += this.getLengthOfWordBreak( a_str, i );
		}
		return i - a_nFrom;
	}

	this.parseOperator = function( a_Context, a_Result, a_bNotAllowed )
	{
		a_Context.nCur += this.getLengthOfWordBreak( a_Context.strSrc, a_Context.nCur );

		var rslt = new Object;
		if ( !this.getOperator( a_Context, rslt ) )
			return false;

		if ( rslt.eType == ESNT_NOT )
		{
			if (a_bNotAllowed)
			{
			    if ( a_Context.bNOT )
			    {
				    rslt.eType = ESNT_OR;
			    }
			    else
			    {
				    a_Context.bNOT = true;
			    }
			}
			else
			{
			    a_Context.bFailed = true;
			    return false ;			
			}
		}
		a_Result.eType = rslt.eType;
		a_Result.right = new SolNode();
		if ( !this.parseTerm( a_Context, a_Result.right ) )
			return false;

		return true;
	}

	this.parseTerm = function( a_Context, a_Result )
	{
		a_Context.nCur += this.getLengthOfWordBreak( a_Context.strSrc, a_Context.nCur );

		var rslt = new Object;
		if ( !this.getTerm( a_Context, rslt ) )
		{
			if (( this.parseOperator( a_Context, rslt, true ) )&&(rslt.eType == ESNT_NOT))
		    {
		        a_Result.eType = rslt.eType;
		        if (rslt.right.eType == ESNT_DEFAULT)
		        {
			        a_Result.strTerm = rslt.right.strTerm;	
			        return true ;		    
			    }
			    else
			    {
			        a_Context.bFailed = true;
			        return false;
			    }
		    }
		    else
		    {
		        a_Context.bFailed = true;
			    return false;
		    }			
		}

		if ( this.parseOperator( a_Context, a_Result, false ) )
		{
			a_Result.left = new SolNode();
			a_Result.left.eType = rslt.eType;
			a_Result.left.strTerm = rslt.strTerm;
		}
		else
		{
			a_Result.eType = rslt.eType;
			a_Result.strTerm = rslt.strTerm;
		}
		
		return true;
	}

	this.extractTerm = function( a_Context, a_Term )
	{
		a_Term.aWords = new Array();
		this.dolSegment( a_Term.strTerm, a_Term.aWords );

		if ( a_Term.aWords.length == 0 )
			return false;

		for ( var i = 0; i < a_Term.aWords.length; i++ )
		{
			a_Term.aWords[i].nWordId = a_Term.aWords[i].nPosition + a_Context.nWordIndex;
		}
		a_Context.nWordIndex = a_Term.aWords[a_Term.aWords.length - 1].nWordId + 1;
		return true;
	}

	this.parsePhraseAndDefault = function( a_Context, a_Node )
	{
		if ( a_Node.eType == ESNT_PHRASE || a_Node.eType == ESNT_DEFAULT || a_Node.eType == ESNT_NOT)
		{
			if ( !this.extractTerm( a_Context, a_Node ) &&
				 a_Node.eType == ESNT_PHRASE )
				a_Context.bFailed = true;
		}
		else
		{
			this.parsePhraseAndDefault( a_Context, a_Node.left );
			this.parsePhraseAndDefault( a_Context, a_Node.right );
		}
	}

	this.helStem = function( a_strOrg, a_Result )
	{
		this.langSev.getNormalizedOrg( a_strOrg, a_Result );
		this.langSev.helStem( a_Result );
	}
	
	this.dolSegment = function( a_strSrc, a_Result )
	{
		var nLen = a_strSrc.length;
		var nCur = 0;
		var nPosition = 1;
		var strWord = "";

		nCur += this.getLengthOfWordBreak( a_strSrc, nCur );
		while ( nCur < nLen )
		{
			strWord = this.getWord( a_strSrc, nCur );
			a_Result[a_Result.length] = new DolWord( strWord, nPosition );
			
			nCur += strWord.length;
			nPosition += this.getPositionInc( a_strSrc, nCur );
			nCur += this.getLengthOfWordBreak( a_strSrc, nCur );
		}
	}
	
	this.solParse = function( a_strSrc, a_Result )
	{
		var context = new RunesContext( a_strSrc );
		this.parseTerm( context, a_Result );

		if ( context.bFailed )
			return false;
			
		this.parsePhraseAndDefault( context, a_Result );
		if ( context.bFailed )
			return false;

		return true;
	}
}

// HuginInput.js--------------------------------

function _helStemNode( a_Runes, a_Node )
{
	with ( a_Node )
	{
		if ( eType == ESNT_PHRASE || eType == ESNT_DEFAULT || eType == ESNT_NOT)
		{
			for ( var i = 0; i < aWords.length; i++ )
			{
				a_Runes.helStem( aWords[i].strWord, aWords[i] )
			}
		}
		else
		{
			_helStemNode( a_Runes, left );
			_helStemNode( a_Runes, right );
		}
	}
}

function parseQueryExpression( a_strQuery )
{
	var runes = new RunesService();
	var expression = new SolNode();
	if ( !runes.solParse( a_strQuery, expression ) )
		return null;
		
	_helStemNode( runes, expression )
	
	return expression;
}


// RankingCalculator.js-------------------------

var	EWMT_NotMatch			= 0;
var	EWMT_SynonymMatch		= 1;
var	EWMT_WordMatch			= 2;
var	EWMT_ShapeMatch			= 3;

var WEIGHT_OF_SHAPE_MATCH			= 0.5;
var WEIGHT_OF_SINGLE_WORD_SCORE		= 0.5;
var HUGIN_KEYWORD_FLAG				= 0x0040;
var HUGIN_TITLE_FLAG				= 0x0080;
var WORDSHAPE_SYNONYM				= -2;

function _rank_ULaw( a_fX )
{
	if ( a_fX < 0.0 )
		return 0.0;

	return 1.0 - 1.0 / ( a_fX + 1.0 );
}

function _rank_Weaken( a_fWeight, a_fPercent )
{
	var fPercent = ( a_fPercent < 0.0 ) ? 0.0 : 
				   ( a_fPercent > 1.0 ) ? 1.0 : a_fPercent;

	return 1 - fPercent + a_fWeight * fPercent;
}

function _isKeyWord( a_uEmphasis )
{
	return ( a_uEmphasis & HUGIN_KEYWORD_FLAG ) != 0;
}

function _isTitle( a_uEmphasis )
{
	return ( a_uEmphasis & HUGIN_TITLE_FLAG ) != 0;
}

function _isUpperCaseShape( a_nWordShape )
{
	return a_nWordShape % 2 != 0;
}

function _emphasisToScore( a_uEmphasis )
{
	var nScore = 0;

	//H1 = 64, H2 = 32, H3 = 16, H4 = 8, H5 = 4, H6 = 2
	for ( var i = 5, nInc = 2; i >= 0; i--, nInc *= 2 )
		nScore += nInc * ( ( a_uEmphasis >> i ) & 1 );

	return nScore;
}

function _getWordMatchType( a_Word, a_Tile, a_nPosition, a_nOffset )
{
	var eRslt = EWMT_NotMatch;

	// The term must be consecutive.
	if ( a_nPosition - a_nOffset != a_Word.nWordId )
		return eRslt;

	for ( var i = 0; i < a_Tile.aWords.length; i++ )
	{
		var eCur = EWMT_NotMatch;