FortranIO.jl

Input/Output of fortran unformatted binary files.
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7 Years Ago
Started In
December 2012

FortanIO.jl

Fortran binary (unformatted) file input/output for Julia.

Example

Assume we have some fortran code like the following that saves out data to data.bin.

    integer*8 :: x(100)
    real*8 :: y(100)
    
    ! ... code that calculates something in x and y ...

    open(unit=9, file="data.bin", form="unformatted")
    write(9) x
    write(9) y
    close(9)

This can be read into julia as follows:

    load("FortranIO")
    f = open("data.bin")
    x = FortranIO.read_record_array(f, Int64)
    y = FortranIO.read_record_array(f, Float64)
    close(f)

An array of the appropriate size is returned by FortranIO.read_record_array.

If, instead of two separate calls to write in the fortran code above, a single call had been used:

    write(9) x, y

Then, the values can be loaded in julia using

    FortranIO.read_record(f, Array(Int64,100), Array(Float64,100))

Values can also be written:

    f = open("file.bin", "w")
    # Write a record containing one Int64
    FortranIO.write_record(f, 10)
    # Write a second record containing several values of different types
    FortranIO.write_record(f, [1,2,3], int32(4), 5.0)
    close(f)

TODO

Handle strings