checkBufferSize(8);
    public final void writeLong(long v) throws IOException {        buf[count++] = (byte) (v >>> 56 & 0xFF);        buf[count++] = (byte) (v >>> 48 & 0xFF);        buf[count++] = (byte) (v >>> 40 & 0xFF);        buf[count++] = (byte) (v >>> 32 & 0xFF);        buf[count++] = (byte) (v >>> 24 & 0xFF);        buf[count++] = (byte) (v >>> 16 & 0xFF);        buf[count++] = (byte) (v >>>  8 & 0xFF);        buf[count++] = (byte) (v >>>  0 & 0xFF);    }