double roundToDoubleArbitrarily(BigInteger bigInteger) {
      return DoubleUtils.bigToDouble(bigInteger);
    }

    @Override
    int sign(BigInteger bigInteger) {
      return bigInteger.signum();
    }

    @Override
    BigInteger toX(double d, RoundingMode mode) {
      return DoubleMath.roundToBigInteger(d, mode);
    }

    @Override
    BigInteger minus(BigInteger a, BigInteger b) {

        }
      }
    }
  }

  private static final BigInteger BAD_FOR_ANDROID_P = new BigInteger("-9223372036854775808");
  private static final BigInteger BAD_FOR_ANDROID_Q = new BigInteger("-1");

  private static final BigInteger BAD_FOR_GINGERBREAD_P = new BigInteger("-9223372036854775808");
  private static final BigInteger BAD_FOR_GINGERBREAD_Q = new BigInteger("-4294967296");

  @GwtIncompatible // TODO

        }
      }
    }
  }

  private static final BigInteger BAD_FOR_ANDROID_P = new BigInteger("-9223372036854775808");
  private static final BigInteger BAD_FOR_ANDROID_Q = new BigInteger("-1");

  private static final BigInteger BAD_FOR_GINGERBREAD_P = new BigInteger("-9223372036854775808");
  private static final BigInteger BAD_FOR_GINGERBREAD_Q = new BigInteger("-4294967296");

  @GwtIncompatible // TODO

          .add(doubleConversionTest + i);
      BigInteger bigI = BigInteger.valueOf(i);
      testBigIntegersBuilder
          .add(bigI)
          .add(BigInteger.valueOf(Long.MAX_VALUE).add(bigI))
          .add(BigInteger.valueOf(Long.MIN_VALUE).add(bigI))
          .add(BigInteger.valueOf(Integer.MAX_VALUE).add(bigI))
          .add(BigInteger.valueOf(Integer.MIN_VALUE).add(bigI))
          .add(BigInteger.ONE.shiftLeft(63).add(bigI))

 */
package org.codelibs.core.convert;

import java.math.BigInteger;

/**
 * {@link BigInteger}用の変換ユーティリティです。
 *
 * @author higa
 */
public abstract class BigIntegerConversionUtil {

    /**
     * {@link BigInteger}に変換します。
     *
     * @param o
     *            変換元のオブジェクト
     * @return 変換された{@link BigInteger}
     */
    public static BigInteger toBigInteger(final Object o) {

      }
    }
  }

  private static final BigInteger MAX_INT = BigInteger.valueOf(Integer.MAX_VALUE);
  private static final BigInteger MIN_INT = BigInteger.valueOf(Integer.MIN_VALUE);

  private static int saturatedCast(BigInteger big) {
    if (big.compareTo(MAX_INT) > 0) {
      return Integer.MAX_VALUE;
    }
    if (big.compareTo(MIN_INT) < 0) {

    }

    @Override
    public BigInteger previous(BigInteger value) {
      return value.subtract(BigInteger.ONE);
    }

    @Override
    BigInteger offset(BigInteger origin, long distance) {
      checkNonnegative(distance, "distance");
      return origin.add(BigInteger.valueOf(distance));
    }

    @Override
    public long distance(BigInteger start, BigInteger end) {

    if (x <= 0) {
      throw new IllegalArgumentException(role + " (" + x + ") must be > 0");
    }
    return x;
  }

  @CanIgnoreReturnValue
  static BigInteger checkPositive(String role, BigInteger x) {
    if (x.signum() <= 0) {
      throw new IllegalArgumentException(role + " (" + x + ") must be > 0");
    }
    return x;
  }

  @CanIgnoreReturnValue

  }

  private static boolean fitsInLong(BigInteger big) {
    return big.bitLength() <= 63;
  }

  private static final BigInteger MAX_LONG = BigInteger.valueOf(Long.MAX_VALUE);
  private static final BigInteger MIN_LONG = BigInteger.valueOf(Long.MIN_VALUE);

  private static long saturatedCast(BigInteger big) {
    if (big.compareTo(MAX_LONG) > 0) {
      return Long.MAX_VALUE;
    }

   */
  static final ImmutableSet<BigInteger> POSITIVE_BIGINTEGER_CANDIDATES;

  static final Iterable<BigInteger> NEGATIVE_BIGINTEGER_CANDIDATES;

  static final Iterable<BigInteger> NONZERO_BIGINTEGER_CANDIDATES;

  static final Iterable<BigInteger> ALL_BIGINTEGER_CANDIDATES;

  static {
    ImmutableSet.Builder<BigInteger> bigValues = ImmutableSet.builder();