file/magic/Magdir/apt

#------------------------------------------------------------------------------
# $File: apt,v 1.1 2016/10/17 19:51:57 christos Exp $
# apt: file(1) magic for APT Cache files
# <http://www.fifi.org/doc/libapt-pkg-doc/cache.html/ch2.html>
# <https://anonscm.debian.org/cgit/apt/apt.git/tree/apt-pkg/pkgcache.h#n292>

# before version 10 ("old format"), data was in arch-specific long/short

# old format 64 bit
0   	name		apt-cache-64bit-be
>12	beshort		1		\b, dirty
>40 	bequad		x		\b, %llu packages
>48 	bequad		x		\b, %llu versions

# old format 32 bit
0   	name    	apt-cache-32bit-be
>8  	beshort 	1		\b, dirty
>40 	belong  	x		\b, %u packages
>44 	belong  	x		\b, %u versions

# new format
0	name		apt-cache-be
>6	byte    	1		\b, dirty
>24	belong  	x		\b, %u packages
>28	belong		x		\b, %u versions

0	bequad		0x98FE76DC
>8	ubeshort	<10		APT cache data, version %u
>>10	beshort	    	x	  	\b.%u, 64 bit big-endian
>>0	use		apt-cache-64bit-be

0	lequad	    	0x98FE76DC
>8	uleshort    	<10		APT cache data, version %u
>>10	leshort		x		\b.%u, 64 bit little-endian
>>0	use		\^apt-cache-64bit-be

0	belong	    	0x98FE76DC
>4	ubeshort    	<10	 	APT cache data, version %u
>>6	ubeshort    	x		\b.%u, 32 bit big-endian
>>0	use  		apt-cache-32bit-be
>4	ubyte	    	>9		APT cache data, version %u
>>5	ubyte	    	x		\b.%u, big-endian
>>0	use 		apt-cache-be

0	lelong	    	0x98FE76DC
>4	uleshort    	<10		APT cache data, version %u
>>6	uleshort   	x		\b.%u, 32 bit little-endian
>>0	use 		\^apt-cache-32bit-be
>4	ubyte	    	>9		APT cache data, version %u
>>5	ubyte	    	x		\b.%u, little-endian
>>0	use		\^apt-cache-be