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package com.adobe.utils {
import flash.utils.Endian;
/**
* 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;
}
}
}
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