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

Thu Jan 20 20:42:55 GMT 2022

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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