colonymech / docs / www / colonyscout / internal / includes / uploadify / com / adobe / utils / IntUtil.as @ f59acf11
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/* |
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Copyright (c) 2008, Adobe Systems Incorporated |
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All rights reserved. |
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|
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Redistribution and use in source and binary forms, with or without |
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modification, are permitted provided that the following conditions are |
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met: |
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|
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* Redistributions of source code must retain the above copyright notice, |
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this list of conditions and the following disclaimer. |
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|
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* Redistributions in binary form must reproduce the above copyright |
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notice, this list of conditions and the following disclaimer in the |
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documentation and/or other materials provided with the distribution. |
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|
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* Neither the name of Adobe Systems Incorporated nor the names of its |
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contributors may be used to endorse or promote products derived from |
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this software without specific prior written permission. |
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|
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
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IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
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THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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package com.adobe.utils { |
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|
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import flash.utils.Endian; |
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|
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/** |
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* Contains reusable methods for operations pertaining |
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* to int values. |
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*/ |
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public class IntUtil { |
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|
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/** |
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* Rotates x left n bits |
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* |
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* @langversion ActionScript 3.0 |
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* @playerversion Flash 9.0 |
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* @tiptext |
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*/ |
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public static function rol ( x:int, n:int ):int { |
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return ( x << n ) | ( x >>> ( 32 - n ) ); |
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} |
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|
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/** |
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* Rotates x right n bits |
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* |
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* @langversion ActionScript 3.0 |
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* @playerversion Flash 9.0 |
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* @tiptext |
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*/ |
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public static function ror ( x:int, n:int ):uint { |
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var nn:int = 32 - n; |
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return ( x << nn ) | ( x >>> ( 32 - nn ) ); |
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} |
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|
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/** String for quick lookup of a hex character based on index */ |
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private static var hexChars:String = "0123456789abcdef"; |
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|
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/** |
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* Outputs the hex value of a int, allowing the developer to specify |
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* the endinaness in the process. Hex output is lowercase. |
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* |
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* @param n The int value to output as hex |
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* @param bigEndian Flag to output the int as big or little endian |
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* @return A string of length 8 corresponding to the |
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* hex representation of n ( minus the leading "0x" ) |
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* @langversion ActionScript 3.0 |
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* @playerversion Flash 9.0 |
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* @tiptext |
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*/ |
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public static function toHex( n:int, bigEndian:Boolean = false ):String { |
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var s:String = ""; |
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|
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if ( bigEndian ) { |
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for ( var i:int = 0; i < 4; i++ ) { |
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s += hexChars.charAt( ( n >> ( ( 3 - i ) * 8 + 4 ) ) & 0xF ) |
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+ hexChars.charAt( ( n >> ( ( 3 - i ) * 8 ) ) & 0xF ); |
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} |
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} else { |
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for ( var x:int = 0; x < 4; x++ ) { |
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s += hexChars.charAt( ( n >> ( x * 8 + 4 ) ) & 0xF ) |
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+ hexChars.charAt( ( n >> ( x * 8 ) ) & 0xF ); |
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} |
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} |
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|
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return s; |
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} |
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} |
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|
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} |