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+
+#------------------------------------------------------------------------------
+# $File: mathematica,v 1.17 2023/06/16 19:33:58 christos Exp $
+# mathematica: file(1) magic for mathematica files
+# "H. Nanosecond" <aldomel@ix.netcom.com>
+# Mathematica a multi-purpose math program
+# versions 2.2 and 3.0
+
+0 name wolfram
+>0 string x Mathematica notebook version 2.x
+!:ext mb
+!:mime application/vnd.wolfram.mathematica
+
+#mathematica .mb
+0 string \064\024\012\000\035\000\000\000
+>0 use wolfram
+0 string \064\024\011\000\035\000\000\000
+>0 use wolfram
+
+#
+0 search/1000 Content-type:\040application/mathematica Mathematica notebook version 2.x
+!:ext nb
+!:mime application/mathematica
+
+
+# .ma
+# multiple possibilities:
+
+0 string (*^\n\n::[\011frontEndVersion\ =
+#>41 string >\0 %s
+>0 use wolfram
+
+#0 string (*^\n\n::[\011palette
+
+#0 string (*^\n\n::[\011Information
+#>675 string >\0 %s #doesn't work well
+
+# there may be 'cr' instead of 'nl' in some does this matter?
+
+# generic:
+0 string (*^\r\r::[\011
+>0 use wolfram
+0 string (*^\r\n\r\n::[\011
+>0 use wolfram
+0 string (*^\015
+>0 use wolfram
+0 string (*^\n\r\n\r::[\011
+>0 use wolfram
+0 string (*^\r::[\011
+>0 use wolfram
+0 string (*^\r\n::[\011
+>0 use wolfram
+0 string (*^\n\n::[\011
+>0 use wolfram
+0 string (*^\n::[\011
+>0 use wolfram
+
+
+# Mathematica .mx files
+
+#0 string (*This\ is\ a\ Mathematica\ binary\ dump\ file.\ It\ can\ be\ loaded\ with\ Get.*) Mathematica binary file
+0 string (*This\ is\ a\ Mathematica\ binary\ Mathematica binary file
+#>71 string \000\010\010\010\010\000\000\000\000\000\000\010\100\010\000\000\000
+# >71... is optional
+>88 string >\0 from %s
+
+
+# Mathematica files PBF:
+# 115 115 101 120 102 106 000 001 000 000 000 203 000 001 000
+0 string MMAPBF\000\001\000\000\000\203\000\001\000 Mathematica PBF (fonts I think)
+
+# .ml files These are menu resources I think
+# these start with "[0-9][0-9][0-9]\ A~[0-9][0-9][0-9]\
+# how to put that into a magic rule?
+4 string \ A~ MAthematica .ml file
+
+# .nb files
+#too long 0 string (***********************************************************************\n\n\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ Mathematica-Compatible Notebook Mathematica 3.0 notebook
+0 string (*********************** Mathematica 3.0 notebook
+
+# other (* matches it is a comment start in these langs
+# GRR: Too weak; also matches other languages e.g. ML
+#0 string (* Mathematica, or Pascal, Modula-2 or 3 code text
+
+#########################
+# MatLab v5
+# URL: http://fileformats.archiveteam.org/wiki/MAT
+# Reference: https://www.mathworks.com/help/pdf_doc/matlab/matfile_format.pdf
+# first 116 bytes of header contain text in human-readable form
+0 string MATLAB Matlab v
+#>11 string/T x \b, at 11 "%.105s"
+#!:mime application/octet-stream
+!:mime application/x-matlab-data
+!:ext mat
+# https://de.mathworks.com/help/matlab/import_export/mat-file-versions.html
+# level of the MAT-file like: 5.0 7.0 or maybe 7.3
+#>7 string x LEVEL "%.3s"
+>7 ubyte =0x35 \b5 mat-file
+>7 ubyte !0x35
+>>7 string x \b%.3s mat-file
+>126 short 0x494d (big endian)
+>>124 beshort x version %#04x
+>126 short 0x4d49 (little endian)
+# 0x0100 for level 5.0 and 0x0200 for level 7.0
+>>124 leshort x version %#04x
+# test again so that default clause works
+>126 short x
+# created by MATLAB include Platform sometimes without leading comma (0x2C) or missing
+# like: GLNX86 PCWIN PCWIN64 SOL2 Windows\0407 nt posix
+>>20 search/2 Platform:\040 \b, platform
+>>>&0 string x %-0.2s
+>>>&2 ubyte !0x2C \b%c
+>>>>&0 ubyte !0x2C \b%c
+>>>>>&0 ubyte !0x2C \b%c
+>>>>>>&0 ubyte !0x2C \b%c
+>>>>>>>&0 ubyte !0x2C \b%c
+>>>>>>>>&0 ubyte !0x2C \b%c
+>>>>>>>>>&0 ubyte !0x2C \b%c
+# examples without Platform tag like one_by_zero_char.mat
+>>20 default x
+>>>11 string x "%s"
+# created by MATLAB include time like: Fri Feb 20 15:26:59 2009
+>34 search/9/c created\040on:\040 \b, created
+>>&0 string x %-.24s
+# MatLab v4
+# From: Joerg Jenderek
+# check for valid imaginary flag of Matlab matrix version 4
+13 ushort 0
+# check for valid ASCII matrix name
+>20 ubyte >0x1F
+# skip PreviousEntries.dat with "invalid high" name \304P\344@\001
+>>20 ubyte <0304
+# skip some Netwfw*.dat and $I3KREPH.dat by checking for non zero number of rows
+>>>4 ulong !0
+# skip some CD-ROM filesystem like test-hfs.iso by looking for valid big endian type flag
+>>>>0 ubelong&0xFFffFF00 0x00000300
+>>>>>0 use matlab4
+# no example for 8-bit and 16-bit integers matrix
+>>>>0 ubelong&0xFFffFF00 0x00000400
+>>>>>0 use matlab4
+# branch for Little-Endian variant of Matlab MATrix version 4
+# skip big endian variant by looking for valid low lttle endian type flag
+>>>>0 ulelong <53
+# skip tokens.dat and some Netwfw*.dat by check for valid imaginary flag value of MAT version 4
+>>>>>12 ulelong <2
+# no misidentified little endian MATrix example with "short" matrix name
+>>>>>>16 ulelong <3
+# skip radeon firmware BONAIRE_sdma.bin HAWAII_sdma.bin KABINI_sdma.bin KAVERI_sdma.bin MULLINS_sdma.bin
+# by check for non zero matrix name length
+>>>>>>>16 ubelong >0
+>>>>>>>>0 use \^matlab4
+# little endian MATrix with "long" matrix name or some misidentified samples
+>>>>>>16 ulelong >2
+# skip TileCacheLogo-*.dat with invalid 2nd character \001 of matrix name with length 96
+>>>>>>>21 ubyte >0x1F
+>>>>>>>>0 use \^matlab4
+# Note: called "MATLAB Mat File" with version "Level 4" by DROID via PUID fmt/1550
+# display information of Matlab v4 mat-file
+0 name matlab4 Matlab v4 mat-file
+#!:mime application/octet-stream
+!:mime application/x-matlab-data
+!:ext mat
+# 20-byte header with 5 long integers that contains information describing certain attributes of the Matrix
+# type flag decimal MOPT; maximal 4052=FD4h; maximal 52=34h for little endian
+#>0 ubelong x \b, type flag %u
+#>0 ubelong x (%#x)
+# M: 0~little endian 1~Big Endian 2~VAX D-float 3~VAX G-float 4~Cray
+#>0 ubelong/1000 x \b, M=%u
+>0 ubelong/1000 0 (little endian)
+>0 ubelong/1000 1 (big endian)
+>0 ubelong/1000 2 (VAX D-float)
+>0 ubelong/1000 3 (VAX G-float)
+>0 ubelong/1000 4 (Cray)
+# namlen; the length of the matrix name
+#>16 ubelong x \b, name length %u
+#>(16.L+19) ubyte x \b, TERMINATING NAME CHARACTER=%#x
+# nul terminated matrix name like: fit_params testmatrix testsparsecomplex teststringarray
+#>20 string x \b, MATRIX NAME="%s"
+#>21 ubyte x \b, MAYBE 2ND CHAR=%c
+>16 pstring/L x %s
+# T indicates the matrix type: 0~numeric 1~text 2~sparse
+#>0 ubelong%10 x \b, T=%u
+>0 ubelong%10 0 \b, numeric
+>0 ubelong%10 1 \b, text
+>0 ubelong%10 2 \b, sparse
+# mrows; number of rows in the matrix like: 1 3 8
+>4 ubelong x \b, rows %u
+# ncols; number of columns in the matrix like: 1 3 4 5 9 43
+>8 ubelong x \b, columns %u
+# imagf; imaginary flag; 1~matrix has an imaginary part 0~only real data
+>12 ubelong !0 \b, imaginary (%u)
+# real; Real part of the matrix consists of mrows * ncols numbers