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#------------------------------------------------------------------------------
# $File: lif,v 1.11 2022/10/19 20:15:16 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 DROID fmt-840-signature-id-1195.adx fmt-840-signature-id-1199.adx 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"
#>2 ubelong x LABEL=%8.8x
# 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
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