char[] buf = new char[DEFAULT_BUF_SIZE];
    int nRead;
    long total = 0;
    while ((nRead = from.read(buf)) != -1) {
      to.write(buf, 0, nRead);
      total += nRead;
    }
    return total;
  }

  /**
   * Reads all characters from a {@link Readable} object into a {@link String}. Does not close the
   * {@code Readable}.
   *
   * @param r the object to read from

}

var errUnreadByte = errors.New("bytes.Buffer: UnreadByte: previous operation was not a successful read")

// UnreadByte unreads the last byte returned by the most recent successful
// read operation that read at least one byte. If a write has happened since
// the last read, if the last read returned an error, or if the read read zero
// bytes, UnreadByte returns an error.
func (b *Buffer) UnreadByte() error {

    }

    /**
     * Reads bytes from the file into the specified byte array.
     *
     * @param b the byte array to read data into
     * @return the number of bytes read, or -1 if end of file is reached
     * @throws SmbException if an I/O error occurs
     */
    public int read(final byte b[]) throws SmbException {
        return read(b, 0, b.length);
    }

    /**

      }
    }

    override fun read(
      sink: Buffer,
      byteCount: Long,
    ): Long {
      require(byteCount >= 0L) { "byteCount < 0: $byteCount" }
      check(!closed) { "closed" }
      if (bytesRemaining == 0L) return -1

      val read = super.read(sink, minOf(bytesRemaining, byteCount))
      if (read == -1L) {

import jcifs.internal.util.SMBUtil;

/**
 * SMB2 Read request message.
 *
 * This command is used to read data from a file that has been
 * previously opened with a Create request.
 *
 * @author mbechler
 */
public class Smb2ReadRequest extends ServerMessageBlock2Request<Smb2ReadResponse> implements RequestWithFileId {

    /**
     * Flag to indicate unbuffered read operation
     */

    byte[] buf = createBuffer();
    int read;
    do {
      read = input.read(buf);
    } while (read != -1 && processor.processBytes(buf, 0, read));
    return processor.getResult();
  }

  /**
   * Reads some bytes from an input stream and stores them into the buffer array {@code b}. This
   * method blocks until {@code len} bytes of input data have been read into the array, or end of

* `write(data)`: Writes `data` (`str` or `bytes`) to the file.
* `read(size)`: Reads `size` (`int`) bytes/characters of the file.
* `seek(offset)`: Goes to the byte position `offset` (`int`) in the file.
    * E.g., `await myfile.seek(0)` would go to the start of the file.
    * This is especially useful if you run `await myfile.read()` once and then need to read the contents again.
* `close()`: Closes the file.

        // Read first message
        assertEquals(1, sis.read());
        assertEquals(2, sis.read());

        // Read second message
        assertEquals(3, sis.read());
        assertEquals(4, sis.read());
        assertEquals(5, sis.read());

        // After all data is consumed, next read throws IOException
        assertThrows(IOException.class, () -> sis.read());
    }

    @Test

        ttype = peekc;
        return ttype;
    }

    /**
     * Returns the string that has already been read.
     *
     * @return The string that has already been read.
     */
    public String getReadString() {
        return str.substring(0, colno - 1);
    }

    private int read() {
        if (colno >= str.length()) {
            return -1;
        }
        return str.charAt(colno++);

	buf := make([]byte, 1)
	if _, err := b.Read(nil); err != nil {
		t.Fatalf("1st nil Read = %v; want nil", err)
	}
	if _, err := b.Read(buf); err != errFake {
		t.Fatalf("1st Read = %v; want errFake", err)
	}
	if _, err := b.Read(nil); err != nil {
		t.Fatalf("2nd nil Read = %v; want nil", err)
	}
	if _, err := b.Read(buf); err != nil {
		t.Fatalf("3rd Read with buffer = %v; want nil", err)
	}