Strange problem with structs Linux vs. Mac
Martin Blume
mblume at freesurf.ch
Sun Mar 16 13:23:41 EDT 2008
"jasonwiener" schrieb
>
> I am having a VERY odd problem with unpacking right now.
> I'm reading data from a binary file and then using a very
> simple struct.unpack to get a long. Works fine on my MacBook,
> but when I push it to a Linux box,it acts differently and
> ends up pewking.
> [...]
>
> the data looks to be the same, but the unpacking seems to
> treat it differently.
>
Probably little-endian vs. big-endian issue:
>>> s
'\x1e\xc6\xf3\xb4'
>>> struct.unpack('<I', s)
(3035874846L,)
>>> struct.unpack('>I', s)
(516354996L,)
See help(struct) for further information.
This seems to imply that the Mac, although running now on Intel
processors, is still big-endian.
HTH
Martin
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