Markus Metz wrote:
> Any suggestions on how to compute required file size on 32bit OS with
> sizeof(off_t) = 4 ?
> e.g.
> (double) nrows * ncols * sizeof(DCELL)
> or
> (long long int) nrows * ncols * sizeof(DCELL)
> more generic
> number_of_items * sizeof(item)
>
> and safely compare that to 2^31 (2GB)?
Use double, cast to off_t, check that the two are equal, e.g.
double d_size = (double) nrows * ncols * sizeof(DCELL);
off_t size = (off_t) d_size;
if ((double) size != d_size)
G_fatal_error(_("File too large"));
--
Glynn Clements <[email protected]>
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