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
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