52 lines
1.3 KiB
Text
52 lines
1.3 KiB
Text
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Problem
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Your fortran refuses to read the unformatted fortran files made on another
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system.
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Diagnosis
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---------
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Your computer stores bytes with opposite endianness.
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OR
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Your version of mangle was compiled using the gfortran fortran compiler,
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but you are trying to read unformatted fortran files produced with g77
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fortran code.
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Solution
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--------
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Download the formatted version of the masks available in the "data" section
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of the mangle website http://space.mit.edu/home/tegmark/mangle/
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and use these instead.
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Another Solution
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WARNING: The following hack works only if each number in the unformatted
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fortran file is a single word, i.e. an INTEGER or REAL (not DOUBLE PRECISION).
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On a 32-bit machine, each word contains 4 bytes.
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The following converts files to the opposite endianness using cpio,
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a command famous for its obtuseness.
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1. Make a cpio archive file from the original files, as in
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ls -1 file1 file2 ... | cpio -o > files.cpio
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Notice that the switch -1 is a one, not an ell.
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2. Move the cpio archive to another directory where it will not overwrite
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the old files
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mv files.cpio other_directory
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3. Extract the files from the cpio archive in the new directory
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cd other_directory
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cpio -i -b < files.cpio
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The -b switch is the thing that does the byte-swapping in each word.
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