using System;
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using System.Collections.Generic;
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using System.Text;
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namespace HH.WMS.Utils.NPOI.SS.Util
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{
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public class IEEEDouble
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{
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private static long EXPONENT_MASK = 0x7FF0000000000000L;
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private static int EXPONENT_SHIFT = 52;
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public static long FRAC_MASK = 0x000FFFFFFFFFFFFFL;
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public static int EXPONENT_BIAS = 1023;
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public static long FRAC_ASSUMED_HIGH_BIT = (1L << EXPONENT_SHIFT);
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/**
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* The value the exponent field Gets for all <i>NaN</i> and <i>InfInity</i> values
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*/
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public static int BIASED_EXPONENT_SPECIAL_VALUE = 0x07FF;
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/**
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* @param rawBits the 64 bit binary representation of the double value
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* @return the top 12 bits (sign and biased exponent value)
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*/
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public static int GetBiasedExponent(long rawBits)
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{
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return (int)((rawBits & EXPONENT_MASK) >> EXPONENT_SHIFT);
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}
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}
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}
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