[mkgmap-dev] overlays file for POIs

Mon Jan 18 13:48:14 GMT 2010

Hi Felix,

On Mon, Jan 18, 2010 at 02:19:45PM +0100, Felix Hartmann wrote:
> Actually I found two ways how to make it work. Sometimes the mkgmap  
> style-file code allows so many nice workarounds. :-)
>
> *a)* the odd way
> rcn_ref=* & rcn_ref=10    { name '${rcn_ref}' } [0x01701 resolution 22  
> continue]
> rcn_ref=10                        { name '${rcn_ref}' } [0x01800  
> resolution 22]
>
> *b)* the logic way (which can be used for even more than 2 symbols) -  

Why couldn't the odd way be used for several symbols?
Would having multiple rcn_ref=*& at the start of the rule help?
Why do you need the rcn_ref=*& anyway?  Shouldn't the continue
do the trick already?

Ultimately, I would like to see something like this:

(rcn_ref % 100 / 100) = 1 [symbol for '1__' continue]
(rcn_ref % 10 / 10) = 1 [ symbol for '_1_' continue]
(rcn_ref % 10) = 1 [ symbol for '__1' ]

You might need to prefix these rules with rcn_ref=*.

Removing leading zeros would take some further conditions, something
like this:

rcn_ref > 9 & (rcn_ref % 10 / 10) = 0 [ symbol for '_0_' continue]

and (if we are to support rcn_ref > 999)

rcn_ref > 99 & (rcn_ref % 100 / 100) = 0 [ symbol for '0__' continue]

Currently, the parser does not support arithmetic operators such
as /, %, *, +, -.  Integer arithmetics should be easy implement.

	Marko