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Re: converting artibrary binary data to numeric values

by johngg (Abbot)
on Sep 30, 2012 at 21:57 UTC ( #996547=note: print w/ replies, xml ) Need Help??


in reply to converting artibrary binary data to numeric values

This might help you visualise what is happening when packing and unpacking big- and little-endian values, as mentioned in Corion's reply.

$ perl -E ' > say q{Big-endian}; > $BEflag = pack q{N}, 1; > say unpack q{B*}, $BEflag; > say sprintf q{0x%02x}, ord $_ for split m{}, $BEflag; > say unpack q{N}, $BEflag; > say q{Little-endian}; > $LEflag = pack q{V}, 1; > say unpack q{B*}, $LEflag; > say sprintf q{0x%02x}, ord $_ for split m{}, $LEflag; > say unpack q{V}, $LEflag;' Big-endian 00000000000000000000000000000001 0x00 0x00 0x00 0x01 1 Little-endian 00000001000000000000000000000000 0x01 0x00 0x00 0x00 1 $

I hope this is helpful.

Cheers,

JohnGG


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