[GRASS-dev] is this compiler-safe?

[Markus Metz]

Glynn Clements wrote:
>
> I would use:
>
> 	static int write_int(int fd, int n)
> 	{
> 	    if (write(fd, &n, sizeof(int)) != sizeof(int)) {
> 		G_warning("%s", strerror(errno));
> 		return 0;
> 	    }
> 	
> 	    return 1;
> 	}
>
>
>   
fixed in trunk r40910, devbr r40911 and relbr r40912
> While you're there, can you fix this nonsense:
>
> 	if (file_size > INT_MAX) {
> ?
>   
also fixed, removed

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)?

the segment library and the vector libs in grass7 would need such a test.

Thanks,

Markus M