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BEGIN {
eval { pack "q", 0 };
if ($@) {
print "1..0\n# no 64-bit types\n";
exit(0);
}
}
# First try to figure out whether we have sparse files.
if ($^O eq 'win32' || $^O eq 'vms') {
print "1..0\n# no sparse files\n";
exit(0);
}
open(BIG, ">big");
close(BIG);
my @s;
@s = stat("big");
unless (@s == 13 && defined $s[11] && defined $s[12]) {
print "1..0\n# no sparse files\n";
exit(0);
}
# By now we better be sure that we do have sparse files:
# if we are not, the following will hog 5 gigabytes of disk. Ooops.
print "1..8\n";
open(BIG, ">big");
binmode BIG;
seek(BIG, 5_000_000_000, 0);
print BIG "big";
close BIG;
@s = stat("big");
print "not " unless $s[7] == 5_000_000_003;
print "ok 1\n";
print "not " unless -s "big" == 5_000_000_003;
print "ok 2\n";
open(BIG, "big");
binmode BIG;
seek(BIG, 4_500_000_000, 0);
print "not " unless tell(BIG) == 4_500_000_000;
print "ok 3\n";
seek(BIG, 1, 1);
print "not " unless tell(BIG) == 4_500_000_001;
print "ok 4\n";
seek(BIG, -1, 1);
print "not " unless tell(BIG) == 4_500_000_000;
print "ok 5\n";
seek(BIG, -3, 2);
print "not " unless tell(BIG) == 5_000_000_000;
print "ok 6\n";
my $big;
print "not " unless read(BIG, $big, 3) == 3;
print "ok 7\n";
print "not " unless $big eq "big";
print "ok 8\n";
close(BIG);
# Testing sysseek() and other sys*() io would be nice but for
# the tests to be be portable they require the SEEK_* constants.
unlink "big";
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