- int tsx, tsy, ts;
- /*
- * Each window dimension equals the tile size times 1.5 more
- * than the grid dimension (the border is 3/4 the width of the
- * tiles).
- *
- * We must cast to unsigned before multiplying by two, because
- * *x might be INT_MAX.
- */
- tsx = 2 * (unsigned)*x / (2 * params->w + 3);
- tsy = 2 * (unsigned)*y / (2 * params->h + 3);
- ts = min(tsx, tsy);
- if (expand)
- ds->tilesize = ts;
- else
- ds->tilesize = min(ts, PREFERRED_TILE_SIZE);
+ /* Ick: fake up `ds->tilesize' for macro expansion purposes */
+ struct { int tilesize; } ads, *ds = &ads;
+ ads.tilesize = tilesize;