@Override
        public Long apply(Long x) {
          return -x;
        }
      };

  private static final Function<BigInteger, BigInteger> NEGATE_BIGINT =
      new Function<BigInteger, BigInteger>() {
        @Override
        public BigInteger apply(BigInteger x) {
          return x.negate();
        }
      };

  /*

import com.google.caliper.Param;
import java.math.BigInteger;
import java.math.RoundingMode;
import org.jspecify.annotations.NullUnmarked;

/**
 * Benchmarks for the rounding methods of {@code BigIntegerMath}.
 *
 * @author Louis Wasserman
 */
@NullUnmarked
public class BigIntegerMathRoundingBenchmark {
  private static final BigInteger[] nonzero1 = new BigInteger[ARRAY_SIZE];

          .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))

      }
    }
  }

  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) {

        () -> MathPreconditions.checkPositive("BigInteger", BigInteger.ZERO));
  }

  public void testCheckPositive_positiveBigInteger() {
    MathPreconditions.checkPositive("BigInteger", BigInteger.ONE);
  }

  public void testCheckPositive_negativeBigInteger() {
    assertThrows(
        IllegalArgumentException.class,
        () -> MathPreconditions.checkPositive("BigInteger", BigInteger.ZERO.negate()));
  }

    public static String byteCountToDisplaySize(final long size) {
        return byteCountToDisplaySize(BigInteger.valueOf(size));
    }

    private static String byteCountToDisplaySize(final BigInteger size) {
        Objects.requireNonNull(size, "size");
        final String displaySize;

        if (size.divide(ONE_EB_BI).compareTo(BigInteger.ZERO) > 0) {

import com.google.caliper.Param;
import java.math.BigInteger;
import java.math.RoundingMode;
import org.jspecify.annotations.NullUnmarked;

/**
 * Benchmarks for the rounding methods of {@code BigIntegerMath}.
 *
 * @author Louis Wasserman
 */
@NullUnmarked
public class BigIntegerMathRoundingBenchmark {
  private static final BigInteger[] nonzero1 = new BigInteger[ARRAY_SIZE];

      tagClass = DerHeader.TAG_CLASS_UNIVERSAL,
      tag = 2L,
      codec =
        object : BasicDerAdapter.Codec<BigInteger> {
          override fun decode(reader: DerReader): BigInteger = reader.readBigInteger()

          override fun encode(
            writer: DerWriter,
            value: BigInteger,
          ) = writer.writeBigInteger(value)
        },
    )

  val BIT_STRING =
    BasicDerAdapter(

    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

  }

  /**
   * Does a CPU intensive operation on Integer and returns a BigInteger Used to implement an
   * ordering that spends a lot of cpu.
   */
  static class ExpensiveComputation implements Function<Integer, BigInteger> {
    @Override
    public BigInteger apply(Integer from) {
      BigInteger v = BigInteger.valueOf(from);
      // Math.sin is very slow for values outside 4*pi