33 lines
1.4 KiB
Text
33 lines
1.4 KiB
Text
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#------------------------------------------------------------------------------
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# $File: dif,v 1.1 2020/04/09 19:14:01 christos Exp $
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# dif: file(1) magic for DIF text files
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#------------------------------------------------------------------------------
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# From: Joerg Jenderek
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# URL: http://en.wikipedia.org/wiki/Data_Interchange_Format
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# http://fileformats.archiveteam.org/wiki/Data_Interchange_Format
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# Note: called by TrID "Data Interchange Format",
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# by DROID x-fmt/368 "VisiCalc Database"
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0 string TABLE
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# skip text starting with TABLE by looking for numeric version on 2nd line
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>6 search/2 0,
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# skip DROID x-fmt-41-signature-id-380.dif by looking for key word TUPLES at the beginning
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>>27 search/128 TUPLES Data Interchange Format
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# https://www.pcmatic.com/company/libraries/fileextension/detail.asp?ext=dif.html
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#!:mime application/x-dif-spreadsheet Gnumeric
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# https://github.com/LibreOffice/online/blob/master/discovery.xml
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#!:mime application/x-dif-document LibreOffice
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# https://www.wikidata.org/wiki/Wikidata:WikiProject_Informatics/File_formats/Lists/File_formats
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!:mime application/x-dif
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# https://extension.nirsoft.net/dif
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#!:mime application/vnd.ms-excel
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#!:mime text/plain
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!:ext dif
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# look for double quote 0x22 on 3rd line
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>>>10 search/3 "
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# skip if next character also double quote
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>>>>&0 ubyte !0x22 \b, generator or table name
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# comment like EXCEL, pwm enclosed in double quotes
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>>>>>&-2 string x %s
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