file/magic/Magdir/lif

#------------------------------------------------------------------------------
# $File: lif,v 1.10 2021/04/26 15:56:00 christos Exp $
# lif:  file(1) magic for lif
#
# (Daniel Quinlan <quinlan@yggdrasil.com>)
#
# Modified by:	Joerg Jenderek
# URL:		https://www.hp9845.net/9845/projects/hpdir/
#		https://github.com/bug400/lifutils
# Reference:	https://www.hp9845.net/9845/downloads/manuals/LIF_excerpt_64941-90906_flpRef_Jan84.pdf
# Note:		called by TrID "HP Logical Interchange Format disk image"
0	beshort		0x8000
# GRR: line above is too general as it catches also compressed DEGAS low-res bitmap *.pc1
# skip many compressed DEGAS low-res bitmap *.pc1 by test for unused bytes
>14	beshort		=0
# skip MUNCHIE.PC1 BOARD.PC1 ENEMIES.PC1 by test for low version number
>>20	ubeshort	<0x0100
# skip DEGAS MUNCHIE.PC1 BOARD.PC1 ENEMIES.PC1 by test for ASCII like volume name
#>>>2	ubelong		>0x2020201F
>>>0	use		lif-file
0	name		lif-file
# LIF ID
>0	beshort		x		lif file
!:mime	application/x-lif-disk
# lif used by Tony Duell LIF utilities; enhanced version by Joachim Siebold use also dat; hpi used by hpdir
!:ext	lif/hpi/dat
# volume label; A-Z 0-9 _ ; default are 6 spaces
>2	string		x		"%.6s"
# version number; 0 for systems without extensions or 1 for model 64000
>20	ubeshort	x		\b, version %u
# LIF identifier; 010000 for system 3000
>12	beshort		!0x1000		\b, LIF identifier %#x
# directory start address in units like: 2
>8	ubelong		x		\b, directory
>8	ubelong		!2		start address %u
# length of directory like: 2 4 7 10 12 14 (for model 64000) 16 18 20 24 30 50 57 77 80
>16	ubelong		x		length %u
# level 1 extensions
>20	beshort		=0
>>24	ubequad		!0		\b, for extensions %#llx...
>20	beshort		>0
>>24	ubequad		!0		\b, extensions %#llx...
# word 21-126 reserved for extensions and future use; set to nil
>42	ubequad		!0		\b, RESERVED %#llx
# lif first file name for standard directory; 0xffff... means uninitialized
>8	ubelong		2
>>512	string		<\xff\xff	\b, 1st file %-.10s