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