+SKIP: {
+ skip("no perlio, no :utf8", 12) unless (find PerlIO::Layer 'perlio');
+
+ eval <<EOE;
+ use open ':utf8';
+ open(O, ">utf8");
+ print O chr(0x100);
+ close O;
+ open(I, "<utf8");
+ is(ord(<I>), 0x100, ":utf8 single wide character round-trip");
+ close I;
+EOE
+
+ open F, ">a";
+ @a = map { chr(1 << ($_ << 2)) } 0..5; # 0x1, 0x10, .., 0x100000
+ unshift @a, chr(0); # ... and a null byte in front just for fun
+ print F @a;
+ close F;
+
+ sub systell {
+ use Fcntl 'SEEK_CUR';
+ sysseek($_[0], 0, SEEK_CUR);
+ }
+
+ require bytes; # not use
+
+ my $ok;
+
+ open F, "<:utf8", "a";
+ $ok = $a = 0;
+ for (@a) {
+ unless (
+ ($c = sysread(F, $b, 1)) == 1 &&
+ length($b) == 1 &&
+ ord($b) == ord($_) &&
+ systell(F) == ($a += bytes::length($b))
+ ) {
+ print '# ord($_) == ', ord($_), "\n";
+ print '# ord($b) == ', ord($b), "\n";
+ print '# length($b) == ', length($b), "\n";
+ print '# bytes::length($b) == ', bytes::length($b), "\n";
+ print '# systell(F) == ', systell(F), "\n";
+ print '# $a == ', $a, "\n";
+ print '# $c == ', $c, "\n";
+ last;
+ }
+ $ok++;
+ }
+ close F;
+ ok($ok == @a,
+ "on :utf8 streams sysread() should work on characters, not bytes");
+
+ sub diagnostics {
+ print '# ord($_) == ', ord($_), "\n";
+ print '# bytes::length($_) == ', bytes::length($_), "\n";
+ print '# systell(G) == ', systell(G), "\n";
+ print '# $a == ', $a, "\n";
+ print '# $c == ', $c, "\n";
+ }
+
+
+ my %actions = (
+ syswrite => sub { syswrite G, shift; },
+ 'syswrite len' => sub { syswrite G, shift, 1; },
+ 'syswrite len pad' => sub {
+ my $temp = shift() . "\243";
+ syswrite G, $temp, 1; },
+ 'syswrite off' => sub {
+ my $temp = "\351" . shift();
+ syswrite G, $temp, 1, 1; },
+ 'syswrite off pad' => sub {
+ my $temp = "\351" . shift() . "\243";
+ syswrite G, $temp, 1, 1; },
+ );
+
+ foreach my $key (sort keys %actions) {
+ # syswrite() on should work on characters, not bytes
+ open G, ">:utf8", "b";
+
+ print "# $key\n";
+ $ok = $a = 0;
+ for (@a) {
+ unless (
+ ($c = $actions{$key}($_)) == 1 &&
+ systell(G) == ($a += bytes::length($_))
+ ) {
+ diagnostics();
+ last;
+ }
+ $ok++;
+ }
+ close G;
+ ok($ok == @a,
+ "on :utf8 streams syswrite() should work on characters, not bytes");
+
+ open G, "<:utf8", "b";
+ $ok = $a = 0;
+ for (@a) {
+ unless (
+ ($c = sysread(G, $b, 1)) == 1 &&
+ length($b) == 1 &&
+ ord($b) == ord($_) &&
+ systell(G) == ($a += bytes::length($_))
+ ) {
+ print '# ord($_) == ', ord($_), "\n";
+ print '# ord($b) == ', ord($b), "\n";
+ print '# length($b) == ', length($b), "\n";
+ print '# bytes::length($b) == ', bytes::length($b), "\n";
+ print '# systell(G) == ', systell(G), "\n";
+ print '# $a == ', $a, "\n";
+ print '# $c == ', $c, "\n";
+ last;
+ }
+ $ok++;
+ }
+ close G;
+ ok($ok == @a,
+ "checking syswrite() output on :utf8 streams by reading it back in");
+ }
+}
+SKIP: {
+ skip("no perlio", 2) unless (find PerlIO::Layer 'perlio');
+ skip("no Encode", 2) unless $Config{extensions} =~ m{\bEncode\b};
+
+ eval q[use Encode::Alias;use open ":std", ":locale"];
+ is($@, '', 'can use :std and :locale');
+
+ use open IN => ':non-existent';
+ eval {
+ require Symbol; # Anything that exists but we havn't loaded
+ };
+ like($@, qr/Can't locate Symbol|Recursive call/i,
+ "test for an endless loop in PerlIO_find_layer");
+}
+
+END {
+ 1 while unlink "utf8";
+ 1 while unlink "a";
+ 1 while unlink "b";
+}