When using ossEncode() with a pre-allocated buffer, it seems that which way the buffer fills vary depending on the encoding rules (PER or BER) that I use. Is that true, and what determines where the buffer fills from?

By default PER and BER indefinite-length encodings fill from the top. DER and BER definite-length encodings by default fill from the bottom.

You can force the filling to always be from the top by specifying the ossEncode() flag FRONT_ALIGN, and you can force filling to always be from the bottom by specifying BACK_ALIGN. These flags will force a movement of the encoded data if the position that it is in is not the one you stipulated.


The samples included with some of the Knowledge Center answers are meant for your general understanding of the OSS products. Different versions of the products might produce slightly different outputs. Consult the products documentation and samples for the most up-to-date products information and code examples.



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