bitmap: implement map_and_not.

[akozumpl]

Hi Michael,

here's yet another bitmap.h operator I use when negating a query filter. If you think there should instead be map_not and then map_and let me know (I did map_and_not() because I only have to walk the bitmap once then).

Thanks,
Ales

[mlschroe]

I think I'm going to merge it but rename the function to "map_subtract", just to annoy you ;-)

[akozumpl]

On 03/28/2012 12:26 PM, Michael Schroeder wrote:

I think I'm going to merge it but rename the function to "map_subtract", just to annoy you ;-)

:) damn, how did I think the operation doesn't go by some standard name..

Ales