[mkgmap-dev] [mkgmap-svn] Commit r572: MDR16 is some kind of codebook.

Tue Dec 14 18:42:34 GMT 2021

Hi Ticker,

yes, the tree is still incomplete.
I use the existing tree and whenever it fails to decode a string I try find out the
missing character looking at the original map with the search.
I think you have no chance to do that without the full index file.

I need a pause now and maybe tomorrow I have the complete table.
Then I'll try to print it in some ways and will see if anything looks close to what I find in MDR16...

Gerd

________________________________________
Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von Ticker Berkin <rwb-mkgmap at jagit.co.uk>
Gesendet: Dienstag, 14. Dezember 2021 19:30
An: Development list for mkgmap
Betreff: Re: [mkgmap-dev] [mkgmap-svn] Commit r572:     MDR16   is      some    kind    of      codebook.

Hi Gerd

Do you fill in all the empty leaves with noticeable characters and
report them so you can spot patterns that haven't been defined and
their usage.

There seem to be some chars missing still (qwxy23). I don't know if the
shields/thin/fat separators make it into Mdr15

Ticker

On Tue, 2021-12-14 at 17:32 +0000, Gerd Petermann wrote:
> Hi Ticker,
>
> yes, I'm close to done with the display tool being able to decode the
> string from Adria Topo.
> The 'F' is causing trouble, so probably something in my tree is still
> wrong or incomplete:
> Here's my actual code to dill the Huffman tree:
>                                 add("111", 'A');
>
>                                 add("0111", '\0');
>                                 add("1000", ' ');
>                                 add("1001", 'E');
>                                 add("1010", 'N');
>                                 add("1011", 'O');
>                                 add("1100", 'I');
>                                 add("1101", 'R');
>
>                                 add("01100", 'K');
>                                 add("00101", 'C');
>                                 add("00110", 'S');
>                                 add("00111", 'D');
>                                 add("01000", 'T');
>                                 add("01001", 'M');
>                                 add("01010", 'V');
>                                 add("01011", 'J');
>                                 add("01101", 'L');
>
>                                 add("000101", 'G');
>                                 add("000110", 'Z');
>                                 add("001000", 'P');
>                                 add("000111", 'U');
>                                 add("001001", 'B');
>
> //                              add("0000000", 'F');
>                                 add("0000110", 'H');
>                                 add("0000111", '1');
>                                 add("0001001", '.');
>
>                                 add("00000011", '5');
>                                 add("00000100", '6');
>                                 add("00000111", '7');
>                                 add("00001000", '8');
>                                 add("00001001", '9');
>                                 add("00001010", '0');
>                                 add("00001011", '4');
>                                 add("00000101", '-');
>                                 add("000000100", '(');
>                                 add("000000101", ')');
>
> Gerd

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