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1 | f59acf11 | Dan Shope | /* |
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2 | Copyright (c) 2008, Adobe Systems Incorporated |
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3 | All rights reserved. |
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4 | |||
5 | Redistribution and use in source and binary forms, with or without |
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6 | modification, are permitted provided that the following conditions are |
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7 | met: |
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8 | |||
9 | * Redistributions of source code must retain the above copyright notice, |
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10 | this list of conditions and the following disclaimer. |
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11 | |||
12 | * Redistributions in binary form must reproduce the above copyright |
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13 | notice, this list of conditions and the following disclaimer in the |
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14 | documentation and/or other materials provided with the distribution. |
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15 | |||
16 | * Neither the name of Adobe Systems Incorporated nor the names of its |
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17 | contributors may be used to endorse or promote products derived from |
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18 | this software without specific prior written permission. |
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19 | |||
20 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
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21 | IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
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22 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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23 | PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
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24 | CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
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25 | EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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26 | PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
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27 | PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
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28 | LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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29 | NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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30 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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31 | */ |
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32 | package com.adobe.utils { |
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33 | |||
34 | import flash.utils.Endian; |
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35 | |||
36 | /** |
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37 | * Contains reusable methods for operations pertaining |
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38 | * to int values. |
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39 | */ |
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40 | public class IntUtil { |
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41 | |||
42 | /** |
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43 | * Rotates x left n bits |
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44 | * |
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45 | * @langversion ActionScript 3.0 |
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46 | * @playerversion Flash 9.0 |
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47 | * @tiptext |
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48 | */ |
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49 | public static function rol ( x:int, n:int ):int { |
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50 | return ( x << n ) | ( x >>> ( 32 - n ) ); |
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51 | } |
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52 | |||
53 | /** |
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54 | * Rotates x right n bits |
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55 | * |
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56 | * @langversion ActionScript 3.0 |
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57 | * @playerversion Flash 9.0 |
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58 | * @tiptext |
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59 | */ |
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60 | public static function ror ( x:int, n:int ):uint { |
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61 | var nn:int = 32 - n; |
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62 | return ( x << nn ) | ( x >>> ( 32 - nn ) ); |
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63 | } |
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64 | |||
65 | /** String for quick lookup of a hex character based on index */ |
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66 | private static var hexChars:String = "0123456789abcdef"; |
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67 | |||
68 | /** |
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69 | * Outputs the hex value of a int, allowing the developer to specify |
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70 | * the endinaness in the process. Hex output is lowercase. |
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71 | * |
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72 | * @param n The int value to output as hex |
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73 | * @param bigEndian Flag to output the int as big or little endian |
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74 | * @return A string of length 8 corresponding to the |
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75 | * hex representation of n ( minus the leading "0x" ) |
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76 | * @langversion ActionScript 3.0 |
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77 | * @playerversion Flash 9.0 |
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78 | * @tiptext |
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79 | */ |
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80 | public static function toHex( n:int, bigEndian:Boolean = false ):String { |
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81 | var s:String = ""; |
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82 | |||
83 | if ( bigEndian ) { |
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84 | for ( var i:int = 0; i < 4; i++ ) { |
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85 | s += hexChars.charAt( ( n >> ( ( 3 - i ) * 8 + 4 ) ) & 0xF ) |
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86 | + hexChars.charAt( ( n >> ( ( 3 - i ) * 8 ) ) & 0xF ); |
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87 | } |
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88 | } else { |
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89 | for ( var x:int = 0; x < 4; x++ ) { |
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90 | s += hexChars.charAt( ( n >> ( x * 8 + 4 ) ) & 0xF ) |
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91 | + hexChars.charAt( ( n >> ( x * 8 ) ) & 0xF ); |
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92 | } |
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93 | } |
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94 | |||
95 | return s; |
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96 | } |
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97 | } |
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98 | |||
99 | } |