1
2#------------------------------------------------------------------------------
3# $File: dif,v 1.1 2020/04/09 19:14:01 christos Exp $
4# dif:  file(1) magic for DIF text files
5
6#------------------------------------------------------------------------------
7# From:   Joerg Jenderek
8# URL:    http://en.wikipedia.org/wiki/Data_Interchange_Format
9#         http://fileformats.archiveteam.org/wiki/Data_Interchange_Format
10# Note:   called by TrID "Data Interchange Format",
11#         by DROID x-fmt/368 "VisiCalc Database"
120         string              TABLE
13# skip text starting with TABLE by looking for numeric version on 2nd line
14>6        search/2  0,
15# skip DROID x-fmt-41-signature-id-380.dif by looking for key word TUPLES at the beginning
16>>27      search/128          TUPLES              Data Interchange Format
17# https://www.pcmatic.com/company/libraries/fileextension/detail.asp?ext=dif.html
18#!:mime   application/x-dif-spreadsheet Gnumeric
19# https://github.com/LibreOffice/online/blob/master/discovery.xml
20#!:mime   application/x-dif-document    LibreOffice
21# https://www.wikidata.org/wiki/Wikidata:WikiProject_Informatics/File_formats/Lists/File_formats
22!:mime    application/x-dif
23# https://extension.nirsoft.net/dif
24#!:mime   application/vnd.ms-excel
25#!:mime   text/plain
26!:ext     dif
27# look for double quote 0x22 on 3rd line
28>>>10     search/3  "
29# skip if next character also double quote
30>>>>&0    ubyte               !0x22               \b, generator or table name
31# comment like EXCEL, pwm enclosed in double quotes
32>>>>>&-2  string    x                   %s
33
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