/** Read a single line counted against the header size limit. */
  fun readLine(): String {
    val line = source.readUtf8LineStrict(headerLimit)
    headerLimit -= line.length.toLong()
    return line
  }

  /** Reads headers or trailers. */
  fun readHeaders(): Headers {
    val result = Headers.Builder()
    while (true) {
      val line = readLine()
      if (line.isEmpty()) break
      result.addLenient(line)
    }

        }
        return result;
    }

    static void populate( Reader r ) throws IOException {
        String line;
        BufferedReader br = new BufferedReader( r );

        while(( line = br.readLine() ) != null ) {
            line = line.toUpperCase().trim();
            if( line.length() == 0 ) {
                continue;
            } else if( line.charAt( 0 ) == '#' ) {

        }
        return result;
    }


    void populate ( Reader r, CIFSContext tc ) throws IOException {
        String line;
        BufferedReader br = new BufferedReader(r);

        while ( ( line = br.readLine() ) != null ) {
            line = line.toUpperCase().trim();
            if ( line.length() == 0 ) {
                continue;
            }
            else if ( line.charAt(0) == '#' ) {

     * @return 一行の文字列。終端に達した場合は{@literal null}
     * @see BufferedReader#readLine()
     */
    public static String readLine(final BufferedReader reader) {
        assertArgumentNotNull("reader", reader);

        try {
            return reader.readLine();
        } catch (final IOException e) {
            throw new IORuntimeException(e);
        }
    }

    /**

import java.util.ArrayDeque;
import java.util.Queue;
import javax.annotation.CheckForNull;

/**
 * A class for reading lines of text. Provides the same functionality as {@link
 * java.io.BufferedReader#readLine()} but for all {@link Readable} objects, not just instances of
 * {@link Reader}.
 *
 * @author Chris Nokleberg
 * @since 1.0
 */
@J2ktIncompatible
@GwtIncompatible
@ElementTypesAreNonnullByDefault

        super(messageBuilderFactory, secDispatcher);
    }

    @Override
    protected int doExecute(DefaultEncryptInvoker.LocalContext context) throws Exception {
        String cleartext = context.reader.readLine("Enter the password to encrypt: ", '*');
        context.terminal.writer().println(secDispatcher.encrypt(cleartext, null));
        return OK;
    }

        super(messageBuilderFactory, secDispatcher);
    }

    @Override
    protected int doExecute(DefaultEncryptInvoker.LocalContext context) throws Exception {
        String encrypted = context.reader.readLine("Enter the password to decrypt: ");
        if (secDispatcher.isAnyEncryptedString(encrypted)) {
            context.terminal.writer().println(secDispatcher.decrypt(encrypted));
            return OK;
        } else {

    DataInput in = new LittleEndianDataInputStream(new ByteArrayInputStream(data));
    UnsupportedOperationException expected =
        assertThrows(UnsupportedOperationException.class, () -> in.readLine());
    assertThat(expected).hasMessageThat().isEqualTo("readLine is not supported");
  }

  public void testReadLittleEndian() throws IOException {
    DataInput in = new LittleEndianDataInputStream(new ByteArrayInputStream(data));

    DataInput in = new LittleEndianDataInputStream(new ByteArrayInputStream(data));
    UnsupportedOperationException expected =
        assertThrows(UnsupportedOperationException.class, () -> in.readLine());
    assertThat(expected).hasMessageThat().isEqualTo("readLine is not supported");
  }

  public void testReadLittleEndian() throws IOException {
    DataInput in = new LittleEndianDataInputStream(new ByteArrayInputStream(data));

            header = ReaderUtil.readLine(reader);
            if (header == null) {
                throwValidationError(messages -> messages.addErrorsInvalidHeaderForRequestFile(GLOBAL, "no header"),
                        () -> asListHtml(this::saveToken));
                return redirect(getClass()); // no-op
            }
            String line;
            while ((line = ReaderUtil.readLine(reader)) != null) {