org.apache.daffodil.processors.unparsers
Several sub-unparsers need to have the value length, and the target length in order to compute their own length.
Returns number of bits to skip.
This can be negative if the unparsed data was too big.
It is up to the caller to determine if this is an error or not.
Several sub-unparsers need to have the value length, and the target length in order to compute their own length.