[mkgmap-dev] use of --mdr7-del can break address search/street search

Thu Jan 20 22:00:36 GMT 2022

Hi Gerd

I got confused between Mdr15 (full string for gmapi) and Mdr17 (partial
string for device), so what I wrote here makes little sense.

I need to think about it more. Sorry for wasting your time.

Ticker

On Thu, 2022-01-20 at 20:42 +0000, Ticker Berkin wrote:
> Hi Gerd
> 
> It could be trying to represent something as follows:
> 
> For a device, there is no MDR17 string, so no possibility of using
> this
> to have index entries for parts of the street name.
> 
> A street LBL can have any number of prefix / suffix chars.
> Multiple mdr7 repeat records can be generated for the same label,
> each
> specifying a prefix and suffix marker count/index to indicate that
> part
> of the label to be searchable.
> 
> MdrDisplay shows these prefix/suffix indexes
> 
> Ticker    
> 
> On Thu, 2022-01-20 at 20:02 +0000, Gerd Petermann wrote:
> > Hi Ticker,
> > 
> > I also wondered why these lines still exist:
> >                         int bitsPrefix = (maxPrefixCount == 0) ? 0
> > :
> > Integer.numberOfTrailingZeros(Integer.highestOneBit(maxPrefixCount)
> > )
> > + 1;
> >                         int bitsSuffix = (maxSuffixCount == 0) ? 0
> > :
> > Integer.numberOfTrailingZeros(Integer.highestOneBit(maxSuffixCount)
> > )
> > + 1;
> > 
> > The two counters are never increased in the current code. In r3968
> > there's some commented code which used them.
> > 
> > Gerd
> > 
> > ________________________________________
> > Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag
> > von Ticker Berkin <rwb-mkgmap at jagit.co.uk>
> > Gesendet: Donnerstag, 20. Januar 2022 19:22
> > An: mkgmap-dev at lists.mkgmap.org.uk
> > Betreff: Re: [mkgmap-dev] use of        --mdr7-del      can    
> > break   address search/street   search
> > 
> > Hi Gerd
> > 
> > I'm struggling to understand the possibilities of Mdr7 (ordering,
> > partialInfo, nameOffset, string different to label, etc etc)
> > 
> > My initial thought about nameOffset was that it was for skipping
> > over
> > the shield prefix or text before the 0x1b marker.
> > 
> > partialInfo is very strange; it seems to be used for part of the rr
> > flag but the code suggests it also held counts of the number of
> > prefixes and suffixes.
> > 
> > Sorry - not being much use here.
> > 
> > Ticker
> > 
> > 
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> 
> 
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