Reading binary file to Julia

New to Julia
2

I don’t have some test data to be certain, but perhaps this could work:

struct Data{T}
    x::T
    y::T
    z::T
    pdf::T
end

function read_file(path; coordinate_conversion=nothing)
    data = Data{Float32}[]
    open(path, "r") do io
        
        # buffer of raw bytes for each item of data
        buffer = Vector{UInt8}(undef, sizeof(Data{Float32}))
        while !eof(io)
            readbytes!(io, buffer)
            push!(data, (reinterpret(Data{Float32}, buffer)[1]))
        end
    end
    data = @views data[5:end]
    if !isnothing(coordinate_conversion)
        data .= coordinate_conversion.(data) # convert in-place
    end

    return data
end

I believe reinterpret is little endian for the most part (see this post).

This isn’t the most performant implementation as it keeps resizing the array, but it should get you part of the way there.

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