Re:
http://sqlite.org:8080/cgi-bin/mailman/private/sqlite-users/2012-January/036
538.html
download (modified sqlite3.c, posix wrapper, test app, IAR project ) from
http://dl.dropbox.com/u/49916007/SQlite.zip
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This mail describes how I implemented SQLite3 on a resource limited
processor. The attached zip file contains sources and the IAR project files.
Any missing sources e.g. fatfs are part of the IAR IDE and are freely
available.
Enjoy.
Development Environment
===
1)
I've just managed to port SQLite to an 50MHz ARM with 256KB ROM and 96KB
RAM.
It was an interesting exercise, not too painful and quite successful. I have
tables of 1 rows, foreign keys, indices etc. Performance is reasonable
and it seems to be stable.
At this stage I'd like to contribute
Testing with Microsoft Outlook
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How do I reply to a thread?
I put Re: Re: [thread title] into the subject but it comes out as a new
thread
e.g. I put "Re: Re: [sqlite] ftruncate implementation" in the subject field
but a new thread "[sqlite] ftruncate implementation" was started.
I am working without an operating system so there are no other agents trying
to steal data. Bearing that in mind, is it still necessary to actually write
zero data to the sectors allocated? Is SQLite expecting it?
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Thanks for the tip which seems to do the trick.
When using MEMSYS3 I was able to create a table with a primary key but
inserting rows ran out of memory after 170 rows.
Now, with MEMSYS5, I inserted 5000 rows, no problem.
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According to the posix definition of "ftruncate" , a file is made larger by
writing zeroes up to the size desired.
My implementation of Fat File System can quickly extend a file by allocating
more sectors, but will take a long time to write all those new sectors with
zeroes.
So, is zero filling
I asked this question on the sql_dev list which Richard Hipp told me that
this list was the proper place.
I asked whether it is possible to execute SQLite in 80K of RAM. Well, I can
now tell you that you can, just about.
My environment has no malloc so I used the MEMSYS5 method of internal
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