if (off + stub_frag_len > in.length) {
                // shouldn't happen if alloc_hint is correct or greater
                final byte[] tmp = new byte[off + stub_frag_len];
                System.arraycopy(in, 0, tmp, 0, off);
                in = tmp;
            }
            System.arraycopy(fragBytes, 24, in, off, stub_frag_len);
            off += stub_frag_len;
        }

      bufs.add(buf);
      int off = 0;
      while (off < buf.length) {
        // always OK to fill buf; its size plus the rest of bufs is never more than MAX_ARRAY_LEN
        int r = in.read(buf, off, buf.length - off);
        if (r == -1) {
          return combineBuffers(bufs, totalLen);
        }
        off += r;
        totalLen += r;
      }
    }

	r := NewReader([]byte("0123456789"))
	tests := []struct {
		off     int64
		seek    int
		n       int
		want    string
		wantpos int64
		readerr error
		seekerr string
	}{
		{seek: io.SeekStart, off: 0, n: 20, want: "0123456789"},
		{seek: io.SeekStart, off: 1, n: 1, want: "1"},
		{seek: io.SeekCurrent, off: 1, wantpos: 3, n: 2, want: "34"},
		{seek: io.SeekStart, off: -1, seekerr: "bytes.Reader.Seek: negative position"},

          checkPositionIndexes(off, off + len, buf.length);

          int i = off;
          for (; i < off + len; i++) {
            int b = read();
            if (b == -1) {
              int read = i - off;
              return read == 0 ? -1 : read;
            }
            buf[i] = (byte) b;
          }
          return i - off;
        }

        @Override

        this.b = b;
        this.off = off;
        command = SMB_COM_WRITE;
    }

    void setParam(final int fid, final long offset, final int remaining, final byte[] b, final int off, final int len) {
        this.fid = fid;
        this.offset = (int) (offset & 0xFFFFFFFFL);
        this.remaining = remaining;
        this.b = b;
        this.off = off;
        count = len;
        digest = null; /* otherwise recycled commands

        return getInput().readDirect(buf, off, len);

    }

    @Override
    public void send(final byte[] buf, final int off, final int length) throws IOException {
        getOutput().writeDirect(buf, off, length, 1);
    }

    /**
     *
     * {@inheritDoc}
     *
     * @see jcifs.smb.SmbPipeHandleInternal#getPipeType()
     */

            e.type = SMBUtil.readInt2(buffer, bufferIndex);
            bufferIndex += 2;
            int off = SMBUtil.readInt4(buffer, bufferIndex);
            bufferIndex += 4;
            off = (off & 0xFFFF) - this.converter;
            off = start + off;
            e.remark = readString(buffer, off, 128, false);

            if (log.isTraceEnabled()) {
                log.trace(e.toString());
            }

        this.b = b;
        this.off = off;
        this.dataLength = len;
    }

    /**
     * Sets the parameters for this write AndX request.
     *
     * @param fid the file identifier
     * @param offset the file offset at which to write
     * @param remaining the number of bytes remaining to be written
     * @param b the data buffer containing bytes to write
     * @param off the offset in the buffer where data starts

  /**
   * Puts a chunk of an array of bytes into this sink. {@code bytes[off]} is the first byte written,
   * {@code bytes[off + len - 1]} is the last.
   *
   * @param bytes a byte array
   * @param off the start offset in the array
   * @param len the number of bytes to write
   * @return this instance
   * @throws IndexOutOfBoundsException if {@code off < 0} or {@code off + len > bytes.length} or
   *     {@code len < 0}
   */

    public void writeDirect(final byte[] b, int off, int len, final int flags) throws IOException {
        if (len <= 0) {
            return;
        }

        if (tmp == null) {
            throw new IOException("Bad file descriptor");
        }
        ensureOpen();

        if (LogStream.level >= 4) {
            SmbFile.log.println("write: fid=" + file.fid + ",off=" + off + ",len=" + len);
        }