Hi 

We were attempting to use test_onefile.c based approach 
(http://www.sqlite.org/src/doc/trunk/src/test_onefile.c). This is for embedded 
where filesystem is not available.
This code works and we can create, insert, select on the database created using 
this test_onefile.c. 

However we want to save the db to flash and saw that we should be implementing 
below functions but didn't find any relevant information about it.

**       mediaRead();            - Read a 512 byte block from the file.
**       mediaWrite();           - Write a 512 byte block to the file.
**       mediaSync();            - Tell the media hardware to sync.

I have few questions about it. If you answer them it would be really valuable 
information for us. 
1. Signature for these functions with meaning of the argument 2. After writing 
the above functions to behave as expected, how to integrate it with rest of the 
code?
3. As per our understanding we have to just write above 3 functions and we are 
done. Is this understanding correct?

Thanks,
Nitin

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