Example usage for com.google.common.math LongMath pow

Introduction

In this page you can find the example usage for com.google.common.math LongMath pow.

Prototype

@GwtIncompatible("TODO")
public static long pow(long b, int k) 

Source Link

Document

Returns b to the k th power.

Usage

From source file:edu.mit.streamjit.util.affinity.NullAffinityStrategy.java

@Override
public long getMaximalAffinityMask() {
    return LongMath.pow(2, Runtime.getRuntime().availableProcessors()) - 1;
}

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From source file:io.v.todos.persistence.syncbase.IdGenerator.java

/**
 * @param alphabet the alphabet of legal characters for IDs generated by this generator
 * @param perturb whether or not to perturb generated IDs by a random perturbation to avoid
 *                collisions in distributed key generation. Pass {@code false} if this generator
 *                is used to generate a sort key that is a secondary key where ordering
 *                conflicts can be deterministically resolved by the primary key. This setting
 *                only applies to the {@code generate...} methods.
 *//*  w w  w.  jav a 2s.  co m*/
public IdGenerator(IdAlphabet alphabet, boolean perturb) {
    mAlphabet = alphabet;
    mPerturb = perturb;

    // Find the maximum number of digits we'd need to encode an unsigned long if the radix were
    // uniform for the entire string.
    // ceil(log_RADIX(Long.MAX + 1))
    mLongUniformRadixLength = (int) Math.ceil(LOG_LONG / Math.log(alphabet.radix()));
    mMostSignificantUnit = LongMath.pow(alphabet.radix(), mLongUniformRadixLength - 1);

    mMaxSafeMostSignificantDigit = (int) (Long.MAX_VALUE / mMostSignificantUnit);
    mMaxSafeMostSignificantValue = mMaxSafeMostSignificantDigit * mMostSignificantUnit;

    // The first character may have additional restrictions, so we have less chars to work with
    // for the first digit. If we still have enough digits, we'll proceed and just use a special
    // mapping for the leading digit. Otherwise, we'll pad by a leading zero, thus making the
    // remaining encoding the common case.

    // So, what most-significant digit do we need to encode the max unsigned value?
    PartialDivisionResult div = transformToSignedDivision(-1);
    int maxMostSignficantDigit = div.partialMostSignificantDigit
            + (int) (div.partialRemainder / mMostSignificantUnit);
    mLongEncodedLength = maxMostSignficantDigit < alphabet.leadingRadix() ? mLongUniformRadixLength
            : mLongUniformRadixLength + 1;
}

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From source file:org.apache.james.util.Size.java

public long asBytes() {
    switch (unit) {
    case G:/*from w  ww . ja va2  s. c  om*/
        return value * LongMath.pow(base, 3);
    case M:
        return value * LongMath.pow(base, 2);
    case K:
        return value * LongMath.pow(base, 1);
    default:
        return value;
    }
}

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From source file:com.matthewmitchell.peercoinj.shapeshift.ShapeShiftMonetary.java

private BigInteger getBigIntegerOne() {
    return BigInteger.valueOf(LongMath.pow(10, smallestUnitExponent));
}

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From source file:org.ethereum.datasource.QuotientFilter.java

static int bitsForNumElementsWithLoadFactor(long numElements) {
    if (numElements == 0) {
        return 1;
    }/*w  w  w.  ja v  a2s .  c o  m*/

    int candidateBits = Long.bitCount(numElements) == 1 ? Math.max(1, Long.numberOfTrailingZeros(numElements))
            : Long.numberOfTrailingZeros(Long.highestOneBit(numElements) << 1L);

    //May need an extra bit due to load factor
    if (((long) (LongMath.pow(2, candidateBits) * 0.75)) < numElements) {
        candidateBits++;
    }

    return candidateBits;
}

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From source file:io.bitsquare.gui.main.markets.charts.MarketsChartsViewModel.java

private void buildChartDataItems(List<Offer> sortedList, Offer.Direction direction, List<XYChart.Data> data) {
    data.clear();// w ww  .  j  ava2  s.  co m
    double accumulatedAmount = 0;
    for (Offer offer : sortedList) {
        Fiat priceAsFiat = offer.getPrice();
        if (priceAsFiat != null) {
            double price = (double) priceAsFiat.value / LongMath.pow(10, priceAsFiat.smallestUnitExponent());
            double amount = (double) offer.getAmount().value
                    / LongMath.pow(10, offer.getAmount().smallestUnitExponent());
            accumulatedAmount += amount;
            if (direction.equals(Offer.Direction.BUY))
                data.add(0, new XYChart.Data(price, accumulatedAmount));
            else
                data.add(new XYChart.Data(price, accumulatedAmount));
        }
    }
}

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From source file:io.druid.math.expr.Expr.java

@Override
protected final long evalLong(long left, long right) {
    return LongMath.pow(left, (int) right);
}

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From source file:org.apache.druid.math.expr.Expr.java

@Override
protected final long evalLong(long left, long right) {
    return LongMath.pow(left, Ints.checkedCast(right));
}

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From source file:io.bitsquare.gui.main.market.offerbook.OfferBookChartViewModel.java

private void buildChartAndTableEntries(List<Offer> sortedList, Offer.Direction direction,
        List<XYChart.Data> data, ObservableList<OfferListItem> offerTableList) {
    data.clear();/*from w w  w. j  a v a  2 s . c  o m*/
    double accumulatedAmount = 0;
    List<OfferListItem> offerTableListTemp = new ArrayList<>();
    for (Offer offer : sortedList) {
        Fiat priceAsFiat = offer.getPrice();
        if (priceAsFiat != null) {
            double amount = (double) offer.getAmount().value
                    / LongMath.pow(10, offer.getAmount().smallestUnitExponent());
            accumulatedAmount += amount;
            offerTableListTemp.add(new OfferListItem(offer, accumulatedAmount));

            double price = (double) priceAsFiat.value / LongMath.pow(10, priceAsFiat.smallestUnitExponent());
            if (CurrencyUtil.isCryptoCurrency(getCurrencyCode())) {
                price = price != 0 ? 1d / price : 0;
                if (direction.equals(Offer.Direction.SELL))
                    data.add(0, new XYChart.Data<>(price, accumulatedAmount));
                else
                    data.add(new XYChart.Data<>(price, accumulatedAmount));
            } else {
                if (direction.equals(Offer.Direction.BUY))
                    data.add(0, new XYChart.Data<>(price, accumulatedAmount));
                else
                    data.add(new XYChart.Data<>(price, accumulatedAmount));
            }
        }
    }
    offerTableList.setAll(offerTableListTemp);
}

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