Getting the number of objects in a datafile?

no-reply@allegro.cc (Erik Grahn) — Thu, 30 Oct 2003 17:56:53 +0000

I have an Allegro datafile with a number of BMP objects (tiles) in it being loaded in my program, and am trying to figure out an easy way to figure out how many objects total are in the datafile, is there an easy/clever way to do this?

no-reply@allegro.cc (Niunio) — Thu, 30 Oct 2003 18:05:41 +0000

int NumObjs = 0;;
DATAFILE *DataFile = NULL;

if ((DataFile = load_datafile ("file.dat")!=NULL) {
   while (DataFile[NumObjs]->type != DAT_END)
      ++NumObjs;
}
unload_datafile (DataFile);

Didn't tested.

Note that will count the number of objects. To count only bitmaps (no palette):

int NumBitmaps = 0;
(...)
   while (DataFile[NumObjs]->type != DAT_END) {
      if (DataFile[NumObjs]->type == DAT_BITMAP)
         ++NumBitmaps;
      ++NumObjs;
   }

no-reply@allegro.cc (23yrold3yrold) — Thu, 30 Oct 2003 18:06:48 +0000

There's a sizable and informative thread on this topic somewhere; try a search ...

no-reply@allegro.cc (Erik Grahn) — Thu, 30 Oct 2003 18:20:20 +0000

Yes, cool, thanks both. Actually, Niunio, I saw your first post before you added the checking for BITMAP objects but I came up with something similar myself, this should work now. Methinks it's rather strange that the number of objects isn't stored somewhere in the datafile structure though...