data / file storage format

[andrewroth]

Hi,

I'd like to write a simple workout plugin.  The idea is to run that plugin during a workout to remind me what exercise to do next, how many sets, reps, etc.  I followed the ubuntu guide and am able to compile rockbox and the uisimulator.

Now, I'm wondering how I should store workout info on rockbox.  I need very simple relations, like a workout has many exercises that have many sets.

Are there any libraries like sqlite, tpl, etc. that are known to work on rockbox?  Almost all libraries I look in to require malloc.  At a bare minimum is there maybe XML or CSV helpers I can use?

Thanks.

[saratoga]

I think sqlite alone uses a couple times as much memory as you have for your entire plugin, so its probably not a good option.  I don't think we have any sort of built in file format.

[andrewroth]

Ah, I see.  What is the limit for a plugin anyways?

[gevaerts]

I think sqlite alone uses a couple times as much memory as you have for your entire plugin.

That depends. sqlite won't run on some of our low-memory targets, but it's small enough to fit in the 512K buffer many targets have. See http://www.rockbox.org/tracker/task/8852 for some details

[saratoga]

Ah, I see.  What is the limit for a plugin anyways?

Depends on your player and if you want to have music running at the same time.  For most targets its 512KB with playback also working.  On some its a lot less.   

[JdGordon]

csv is probably the way to go. I dont think there are any helpers but it isnt exaclty hard to write the needed parser.

[andrewroth]

If anyone's interested, I've written some of my brainstorming for this app at http://wiki.github.com/andrewroth/rockbox_workout/brainstorming