Rockbox Development > Starting Development and Compiling

data / file storage format

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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:

--- Quote from: saratoga on August 17, 2010, 11:38:54 PM ---I think sqlite alone uses a couple times as much memory as you have for your entire plugin.

--- End quote ---

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:

--- Quote from: andrewroth on August 18, 2010, 01:26:24 AM ---Ah, I see.  What is the limit for a plugin anyways?

--- End quote ---

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.   

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