-static long
-adjust_blocks (blocks, fromsize, tosize)
- long blocks;
- int fromsize, tosize;
-{
- if (tosize <= 0)
- abort ();
- if (fromsize <= 0)
- return -1;
-
- if (fromsize == tosize) /* e.g., from 512 to 512 */
- return blocks;
- else if (fromsize > tosize) /* e.g., from 2048 to 512 */
- return blocks * (fromsize / tosize);
- else /* e.g., from 256 to 512 */
- return (blocks + (blocks < 0 ? -1 : 1)) / (tosize / fromsize);
-}