[sane-devel] Byte ordering

[James Ring]

On Tue, Jun 3, 2025 at 9:46 PM Ralph Little <skelband at gmail.com> wrote:

> Hi.
> Someone has asked the question about byte order in multi-byte image data
> that we might get from a SANE backend. For example, if the data is 16-bit,
> what assumptions can we make about the byte order of that data? There
> doesn't seem to be anything in the SANE API specification for guidance.
>
> It is not enough to assume the local machine byte order since we may get
> data through the net backend from a remote machine with a different byte
> order.
>

In the case of the net backend, the byte order is indicated in the
SANE_NET_START
response <https://sane-project.gitlab.io/standard/net.html#sane-net-start>.
The client is responsible for reordering bytes if the byte orders differ. I
don't have any experience with other backends. :-)


> Cheers,
> Ralph
>
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