How to use

toLongPow10

method

in

javolution.lang.MathLib

/**
 * Returns the floating point number for the specified <code>double</code>
 * value (convenience method). 
 * 
 * @param doubleValue the <code>double</code> value.
 * @return <code>FloatingPoint.valueOf(longValue, 0)</code>
 */
public static FloatingPoint valueOf(double doubleValue) {
  if (doubleValue == 0.0)
    return FloatingPoint.ZERO;
  if (doubleValue == 1.0)
    return FloatingPoint.ONE;
  if (Double.isNaN(doubleValue) || Double.isInfinite(doubleValue))
    return FloatingPoint.NaN;
  // Find the exponent e such as: value == x.xxx * 10^e
  int e = MathLib.floorLog10(MathLib.abs(doubleValue)) - 18 + 1; // 18 digits significand.
  long significand = MathLib.toLongPow10(doubleValue, -e);
  return FloatingPoint.valueOf(significand, e);
}

/**
 * Returns the real number (inexact except for <code>0.0</code>) 
 * corresponding to the specified <code>double</code> value. 
 * The error is derived from the inexact representation of 
 * <code>double</code> values intrinsic to the 64 bits IEEE 754 format.
 * 
 * @param doubleValue the <code>double</code> value to convert.
 * @return the corresponding real number.
 */
public static Real valueOf(double doubleValue) {
  if (doubleValue == 0.0)
    return Real.ZERO;
  if (Double.isNaN(doubleValue) || Double.isInfinite(doubleValue))
    return Real.NaN;
  // Find the exponent e such as: value == x.xxx * 10^e
  int e = MathLib.floorLog10(MathLib.abs(doubleValue)) - 18 + 1; // 18 digits significand.
  long significand = MathLib.toLongPow10(doubleValue, -e);
  int error = (int) MathLib.toLongPow10(Math.ulp(doubleValue), -e) + 1;
  return Real.valueOf(LargeInteger.valueOf(significand), error, e);
}

if (m == 0)
  return 0L;
return toLongPow10(d * 1E16, n - 16);

if (m == 0)
  return 0L;
return toLongPow10(d * 1E16, n - 16);

if (m == 0)
  return 0L;
return toLongPow10(d * 1E16, n - 16);

if (m == 0)
  return 0L;
return toLongPow10(d * 1E16, n - 16);

if (digits < 0) { // Use 16 or 17 digits.
  long m17 = MathLib.toLongPow10(d, (17 - 1) - e);
  m = MathLib.toLongPow10(d, (digits - 1) - e);

if (digits < 0) { // Use 16 or 17 digits.
  long m17 = MathLib.toLongPow10(d, (17 - 1) - e);
  m = MathLib.toLongPow10(d, (digits - 1) - e);