Re: [mkgmap-dev] option --show-profiles and DEM

Hi Andrzej Thanks for that Nick On 12/01/2018 12:10, Andrzej Popowski wrote:

Hi Nick,

DEM in GMP should be the same. The difference is, that in DEM subfile headers starts at 0, but in GMP header is at address contained at offset 0x2D. If you want to analyze DEM then algorithm is something like that:

char *subfile int  offset;

if (typ == DEM)     offset = 0 if (typ == GMP)     offset = *(int *)(subfile + 0x2D);

HEADER_DEM *header = (HEADER_DEM *)(subfile + offset)

And then you can access DEM data basing on header content. Pointers in header are correct regardless of header position inside subfile, they are always relative to beginning of subfile.