file/magic/Magdir/mathematica

#------------------------------------------------------------------------------
# $File: mathematica,v 1.15 2022/10/31 13:22:26 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

#mathematica .mb
0	string	\064\024\012\000\035\000\000\000	Mathematica version 2 notebook
!:ext mb
0	string	\064\024\011\000\035\000\000\000	Mathematica version 2 notebook
!:ext mb

# .ma
# multiple possibilities:

0	string	(*^\n\n::[\011frontEndVersion\ =\ 	Mathematica notebook
#>41	string	>\0	%s
!:ext mb

#0	string	(*^\n\n::[\011palette	Mathematica notebook version 2.x

#0	string	(*^\n\n::[\011Information	Mathematica notebook version 2.x
#>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	Mathematica notebook version 2.x
!:ext mb
0	string	(*^\r\n\r\n::[\011	Mathematica notebook version 2.x
!:ext mb
0	string	(*^\015			Mathematica notebook version 2.x
!:ext mb
0	string	(*^\n\r\n\r::[\011	Mathematica notebook version 2.x
!:ext mb
0	string	(*^\r::[\011	Mathematica notebook version 2.x
!:ext mb
0	string	(*^\r\n::[\011	Mathematica notebook version 2.x
!:ext mb
0	string	(*^\n\n::[\011	Mathematica notebook version 2.x
!:ext mb
0	string	(*^\n::[\011	Mathematica notebook version 2.x
!:ext mb


# 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
>>>>>>>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
#	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