Method exhaust

guava/src/com/google/common/io/CharStreams.java:250–260

Reads and discards data from the given {@code Readable} until the end of the stream is reached. Returns the total number of chars read. Does not close the stream. @since 20.0

(Readable readable)

   * @since 20.0
   */
  @CanIgnoreReturnValue
  public static long exhaust(Readable readable) throws IOException {
    long total = 0;
    long read;
    CharBuffer buf = createBuffer();
    while ((read = readable.read(buf)) != -1) {
      total += read;
      Java8Compatibility.clear(buf);
    }
    return total;
  }

  /**
   * Discards {@code n} characters of data from the reader. This method will block until the full