Examples of java.math.BigInteger.signum()

java.math.BigInteger.signum()
Returns the signum function of this BigInteger. @return -1, 0 or 1 as the value of this BigInteger is negative, zero orpositive.

            otherValue = ((RubyBignum) other).value;
        } else {
            return coerceBin(context, "divmod", other);
        }


        if (otherValue.signum() == 0) throw runtime.newZeroDivisionError();


        BigInteger[] results = value.divideAndRemainder(otherValue);
        if ((value.signum() * otherValue.signum()) == -1 && results[1].signum() != 0) {
            results[0] = results[0].subtract(BigInteger.ONE);
            results[1] = otherValue.add(results[1]);

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        }


        if (otherValue.signum() == 0) throw runtime.newZeroDivisionError();


        BigInteger[] results = value.divideAndRemainder(otherValue);
        if ((value.signum() * otherValue.signum()) == -1 && results[1].signum() != 0) {
            results[0] = results[0].subtract(BigInteger.ONE);
            results[1] = otherValue.add(results[1]);
      }
        return RubyArray.newArray(runtime, bignorm(runtime, results[0]), bignorm(runtime, results[1]));
    }

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        }
    }
    
    private static byte[] getBignumBytes(RubyBignum arg, int base, boolean sign, boolean upper) {
        BigInteger val = arg.getValue();
        if (sign || base == 10 || val.signum() >= 0) {
            return stringToBytes(val.toString(base),upper);
        }


        // negative values
        byte[] bytes = val.toByteArray();

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    }


    public BigIntegerToken getRandomToken()
    {
        BigInteger token = FBUtilities.hashToBigInteger(GuidGenerator.guidAsBytes());
        if ( token.signum() == -1 )
            token = token.multiply(BigInteger.valueOf(-1L));
        return new BigIntegerToken(token);
    }


    private final Token.TokenFactory<BigInteger> tokenFactory = new Token.TokenFactory<BigInteger>() {

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            return new BigIntegerToken(new BigInteger(initialToken));


        // generate random token
        String guid = GuidGenerator.guid();
        BigInteger token = FBUtilities.hash(guid);
        if ( token.signum() == -1 )
            token = token.multiply(BigInteger.valueOf(-1L));
        return new BigIntegerToken(token);
    }


    private final Token.TokenFactory<BigInteger> tokenFactory = new Token.TokenFactory<BigInteger>() {

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        {
            StscState.get().error("Must be nonnegative integer", XmlErrorContext.MALFORMED_NUMBER, value);
            return null;
        }


        if (bigInt.signum() < 0)
        {
            StscState.get().error("Must be nonnegative integer", XmlErrorContext.MALFORMED_NUMBER, value);
            return null;
        }

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                        continue;


                    baseExponent = baseNode.exponent;
                    tempExponent = nn.exponent;


                    if (baseExponent.signum() != tempExponent.signum()) {
                        baseFactors.remove(j);
                        continue;
                    }


                    if (sign)

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                    if (sign)
                        nn.diffSigns = true;


                    nn.minExponent = baseNode.minExponent;


                    if (baseExponent.signum() > 0 && baseExponent.compareTo(tempExponent) > 0)
                        baseNode.exponent = tempExponent;
                    else if (baseExponent.signum() < 0 && baseExponent.compareTo(tempExponent) < 0)
                        baseNode.exponent = tempExponent;
                    break;
                }

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                    nn.minExponent = baseNode.minExponent;


                    if (baseExponent.signum() > 0 && baseExponent.compareTo(tempExponent) > 0)
                        baseNode.exponent = tempExponent;
                    else if (baseExponent.signum() < 0 && baseExponent.compareTo(tempExponent) < 0)
                        baseNode.exponent = tempExponent;
                    break;
                }


                if (sign == null) {

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  @GwtIncompatible("java.math.BigInteger")
  public void testIsPowerOfTwo() {
    for (int x : ALL_INTEGER_CANDIDATES) {
      // Checks for a single bit set.
      BigInteger bigX = BigInteger.valueOf(x);
      boolean expected = (bigX.signum() > 0) && (bigX.bitCount() == 1);
      assertEquals(expected, IntMath.isPowerOfTwo(x));
    }
  }


  public void testLog2ZeroAlwaysThrows() {

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