Re: Integer-only mode?

--- In sqlite-F5Bj5G+ccuY@xxxxxxxxxxxxxxxx, "hardinginst" <ambw@xxxx> wrote:
> > --- In sqlite-F5Bj5G+ccuY@xxxxxxxxxxxxxxxx, "hardinginst" <ambw@xxxx> wrote:
> > > In our embedded port of SQLite we do not require floating point 
> > > support.  Looking through the code, I don't see an easy way of 
> > > eliminating the floating point code, but we may have a go at it.
> > 
> It is an embedded application, and a lot of embedded processors do 
> not support floating point in hardware.  The emulation of the 
> floating point can be quite slow and adds a large library so it 
does 
> have an effect.  Our application does not store FP numbers either.
> 
> I'm thinking that adding some preprocessor defines like:
> #define float long
> #define double long
> #define strtod atol
> 
> might do the trick.  Any other ideas?

(after a quick look at the source)

- #defines should get most of the work done. You might want to link 
in custom versions of some functions. Not sure.
- Watch out for "printf.c". Just redefining double in there might not 
work.
- sqliteRealToSortable() is a function that will require some work?
- the parser will still parse floats so you might want to add asserts 
into some fns like sqlite_set_result_double() just to be safe.

Jim Lyon




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