51 lines
2 KiB
Plaintext
51 lines
2 KiB
Plaintext
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#------------------------------------------------------------------------------
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# $File: lif,v 1.11 2022/10/19 20:15:16 christos Exp $
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# lif: file(1) magic for lif
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#
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# (Daniel Quinlan <quinlan@yggdrasil.com>)
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#
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# Modified by: Joerg Jenderek
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# URL: https://www.hp9845.net/9845/projects/hpdir/
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# https://github.com/bug400/lifutils
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# Reference: https://www.hp9845.net/9845/downloads/manuals/LIF_excerpt_64941-90906_flpRef_Jan84.pdf
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# Note: called by TrID "HP Logical Interchange Format disk image"
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0 beshort 0x8000
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# GRR: line above is too general as it catches also compressed DEGAS low-res bitmap *.pc1
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# skip many compressed DEGAS low-res bitmap *.pc1 by test for unused bytes
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>14 beshort =0
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# skip MUNCHIE.PC1 BOARD.PC1 ENEMIES.PC1 by test for low version number
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>>20 ubeshort <0x0100
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# skip DROID fmt-840-signature-id-1195.adx fmt-840-signature-id-1199.adx by test for ASCII like volume name
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>>>2 ubelong >0x2020201F
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>>>>0 use lif-file
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0 name lif-file
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# LIF ID
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>0 beshort x lif file
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!:mime application/x-lif-disk
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# lif used by Tony Duell LIF utilities; enhanced version by Joachim Siebold use also dat; hpi used by hpdir
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!:ext lif/hpi/dat
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# volume label; A-Z 0-9 _ ; default are 6 spaces
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>2 string x "%.6s"
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#>2 ubelong x LABEL=%8.8x
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# version number; 0 for systems without extensions or 1 for model 64000
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>20 ubeshort x \b, version %u
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# LIF identifier; 010000 for system 3000
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>12 beshort !0x1000 \b, LIF identifier %#x
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# directory start address in units like: 2
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>8 ubelong x \b, directory
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>8 ubelong !2 start address %u
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# length of directory like: 2 4 7 10 12 14 (for model 64000) 16 18 20 24 30 50 57 77 80
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>16 ubelong x length %u
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# level 1 extensions
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>20 beshort =0
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>>24 ubequad !0 \b, for extensions %#llx...
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>20 beshort >0
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>>24 ubequad !0 \b, extensions %#llx...
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# word 21-126 reserved for extensions and future use; set to nil
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>42 ubequad !0 \b, RESERVED %#llx
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# lif first file name for standard directory; 0xffff... means uninitialized
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>8 ubelong 2
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>>512 string <\xff\xff \b, 1st file %-.10s
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