[luatex] fio library byte order

[Hans Hagen]

On 6/19/2020 11:16 PM, Reinhard Kotucha wrote:
> Hi,
> it's nice that with the fio library LuaTeX can now process binary
> files.  What I'm missing is the ability to specify the byte order
> (little vs. big endian).
> 
> I didn't find any hint, neither in the manual nor in the sources.
> 
> Without being able to specify the byte order usage of the library is
> quite limited.  The byte order of a particular file is not necessarily
> the same as that of your system.
> 
> Some file formats have a certain byte order (PNM, for instance) and
> others precede binary data with a byte order mark (TIFF).  In any case
> it's necessary to specify the byte order before reading binary stuff.
> 
> Is there a chance to provide a switch?
When I have time I'll backport a couple of the additional 
[integer|cardinal]*_le ones that we have in luametatex (I though that 
i'd already done that).

Hans

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