Opening c3d from filestream instead of filepath

[TrevorAshby]

@pariterre Thanks for the great resource that ezc3d is! It's been a huge help in our work. However, we've run into an issue where we are required to load a c3d file from memory that has already been read, meaning that the 2 constructors that exist for the c3d object are insufficient.

Is this feature planned to be added? If we were to go about adding this ourselves, i've identified the following files will need modified:

• ezc3d.h
• ezc3d.cpp

What other files would I need to modify to include an additional constructor function overload?
Thanks again!

[pariterre]

Hi there!
I am not sure that I understand what you try to achieve. Do you mean that you have the equivalent of the ezc3d in the memory and you want to effectively copy it? Or, you mean that you have the actual binary loaded in memory and you want to load it into ezc3d?

If it is the former, I think a simple copy of the ezc3d structure would suffice. For the latter, you would need to add a constructor for the full reading path (including header, parameters and data). This should not be hard at all though as a FILE and a memory access are pretty much the same

[TrevorAshby]

Thanks for the quick comment! It is the latter! I have the c3d file loaded as binary in memory, and need to load that into the ezc3d c3d object. I'm fairly new to c3d, and it's been ages since I have done c++, but I think i've gotten close.

Essentially what I will need to do is add a constructor that takes in an fstream and is used in place of the line?

// ezc3d.cpp line 57
std::fstream stream(_filePath, std::ios::in | std::ios::binary);

I should note as well that we are using the python compiled version. My intended use would load the c3d file as a io.Bytes/BufferedReader/Bytes object which will be read into the c3d object.