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////////////////////////////////////////////////////////////////////////////////
//
// Licensed to the Apache Software Foundation (ASF) under one or more
// contributor license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright ownership.
// The ASF licenses this file to You under the Apache License, Version 2.0
// (the "License"); you may not use this file except in compliance with
// the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
////////////////////////////////////////////////////////////////////////////////
package mx.utils
{
[ExcludeClass]
/**
* @private
*
* Provides several hash implementations, RS, AP, etc.
*/
public class HashUtil
{
public static function rsHash(value:String):Number
{
var a:int = 63689;
var b:int = 378551;
var result:Number;
for (var i:int = 0; i < value.length; i++)
{
result = (result * a) + value.charCodeAt(i);
a = a * b;
}
return (result & 0x7FFFFFFF);
}
public static function jsHash(value:String):Number
{
var result:Number = 1315423911;
for (var i:int = 0; i < value.length; i++)
{
result ^= ((result << 5) + value.charCodeAt(i) + (result >> 2));
}
return (result & 0x7FFFFFFF);
}
public static function apHash(value:String):Number
{
var result:int;
for (var i:int = 0; i < value.length; i++)
{
if ((i & 1) == 0)
{
result ^= ((result << 7)^value.charCodeAt(i)^(result >> 3));
}
else
{
result ^= (~((result << 11)^value.charCodeAt(i)^(result >> 5)));
}
}
return (result & 0x7FFFFFFF);
}
public static function dbjHash(value:String):Number
{
var result:Number = 5381;
for (var i:int = 0; i < value.length; i++)
{
result = ((result << 5) + result) + value.charCodeAt(i);
}
return (result & 0x7FFFFFFF);
}
}
}
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