hex to binary

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

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Re: hex to binary by AnomalousMonk (Archbishop) on Feb 17, 2014 at 04:45 UTC
0x11e64 == 73316, but as others have asked, what's the raw byte order you are given and what unpack templates have you tried? Update: `c:\@Work\Perl>perl -wMstrict -le "my $raw = pack 'H*', '641e0100'; my $le32 = unpack 'V', $raw; printf qq{%d decimal 0x%x hex \n}, $le32, $le32; " 73316 decimal 0x11e64 hex` [download]	[reply] [d/l]
Re^2: hex to binary by Anonymous Monk on Feb 17, 2014 at 04:49 UTC
The raw bytes out of the file are `641e0100`. TBH, i have really no clue right now and have tried the following: perl -le 'print unpack("N", pack("H8",substr("0"x8 . "641e0100",-8))); perl -le 'print unpack("N", pack("H8",substr("0"x8 . "641e0100",-8))); +' perl -le 'print unpack("N", pack("H8",substr("0"x8 . "641e01",-8)));' perl -e "print hex('641e0100')" perl -e "print hex('641e01')" perl -e "print unpack('V',pack 'V', hex('641e01'))" perl -e "print unpack('V', '0x641e01')" perl -e "print unpack('N', '0x641e01')" perl -e "print unpack('n', '0x641e01')" perl -e "print unpack('h', '0x641e0100')" perl -e "print unpack('h', '0x641e0100')" perl -e "print pack('h', '0x641e0100')" [download]	[reply] [d/l] [select]
Re^3: hex to binary by AnomalousMonk (Archbishop) on Feb 17, 2014 at 04:55 UTC
Please see update to my original reply.	[reply]
Re: hex to binary ( UInt32 / Int32 ) by Anonymous Monk on Feb 17, 2014 at 04:35 UTC
code would be nice ... as would a definition for `32 bit little endian value.`, integer, float, boat? I guess 73316 is an integer ... signed? unsigned? I remember, see Re: ID3v2 TAG Footer Reading goes wrong (more subs) `sub Int32 { unpack 'l<', $_[-1] } sub UInt32 { unpack 'L<', $_[-1] } __END__ my $hex = pack 'H*', '641e0100'; dd( $hex ); dd( unpack 'i', $hex ); dd( unpack 'I', $hex ); dd( unpack 'j', $hex ); dd( unpack 'J', $hex ); dd( unpack 'l<', $hex ); dd( unpack 'L<', $hex );` [download]	[reply] [d/l] [select]
Re: hex to binary by LanX (Saint) on Feb 17, 2014 at 04:36 UTC
Which patterns did you try with unpack and what did you get? Cheers Rolf ( addicted to the Perl Programming Language)	[reply]
Re: hex to binary by Anonymous Monk on Feb 17, 2014 at 04:52 UTC
it looks like this is what i'm after. `my $hex = pack 'H*', '641e0100'; print unpack 'I', $hex;print "\n";` [download] Thanks for your help!	[reply] [d/l]
Re^2: hex to binary by Anonymous Monk on Feb 17, 2014 at 06:18 UTC
you're looking for UInt32 because thats 32bit little endian on every platform :) as pack says The integer formats s, S , i , I , l , L , j , and J are inherently non-portable between processors and operating systems because they obey native byteorder and endianness.	[reply]
Re: hex to binary by Anonymous Monk on Feb 17, 2014 at 04:43 UTC
Ah, my title is someone incorrect, Hex to Decimal is what it's meant to read. the 73316 is a decimal representation of the length of the file, so its an integer	[reply]