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