* the License.
 */

package com.google.common.io;

import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.io.CharStreams.createBuffer;

import com.google.common.annotations.GwtIncompatible;
import com.google.common.annotations.J2ktIncompatible;
import com.google.errorprone.annotations.CanIgnoreReturnValue;
import java.io.IOException;

@NullUnmarked
public class CharStreamsCopyBenchmark {
  enum CopyStrategy {
    OLD {
      @Override
      long copy(Readable from, Appendable to) throws IOException {
        CharBuffer buf = CharStreams.createBuffer();
        long total = 0;
        while (from.read(buf) != -1) {
          ((Buffer) buf).flip();
          to.append(buf);
          total += buf.remaining();
          ((Buffer) buf).clear();
        }