Blame t/make_downgrade.pl

Packit 14c646
#!/usr/local/bin/perl -w
Packit 14c646
use strict;
Packit 14c646
Packit 14c646
use 5.007003;
Packit 14c646
use Hash::Util qw(lock_hash unlock_hash lock_keys);
Packit 14c646
use Storable qw(nfreeze);
Packit 14c646
Packit 14c646
# If this looks like a hack, it's probably because it is :-)
Packit 14c646
sub uuencode_it {
Packit 14c646
  my ($data, $name) = @_;
Packit 14c646
  my $frozen = nfreeze $data;
Packit 14c646
Packit 14c646
  my $uu = pack 'u', $frozen;
Packit 14c646
Packit 14c646
  printf "begin %3o $name\n", ord 'A';
Packit 14c646
  print $uu;
Packit 14c646
  print "\nend\n\n";
Packit 14c646
}
Packit 14c646
Packit 14c646
Packit 14c646
my %hash = (perl=>"rules");
Packit 14c646
Packit 14c646
lock_hash %hash;
Packit 14c646
Packit 14c646
uuencode_it (\%hash, "Locked hash");
Packit 14c646
Packit 14c646
unlock_hash %hash;
Packit 14c646
Packit 14c646
lock_keys %hash, 'perl', 'rules';
Packit 14c646
lock_hash %hash;
Packit 14c646
Packit 14c646
uuencode_it (\%hash, "Locked hash placeholder");
Packit 14c646
Packit 14c646
unlock_hash %hash;
Packit 14c646
Packit 14c646
lock_keys %hash, 'perl';
Packit 14c646
Packit 14c646
uuencode_it (\%hash, "Locked keys");
Packit 14c646
Packit 14c646
unlock_hash %hash;
Packit 14c646
Packit 14c646
lock_keys %hash, 'perl', 'rules';
Packit 14c646
Packit 14c646
uuencode_it (\%hash, "Locked keys placeholder");
Packit 14c646
Packit 14c646
unlock_hash %hash;
Packit 14c646
Packit 14c646
my $utf8 = "\x{DF}\x{100}";
Packit 14c646
chop $utf8;
Packit 14c646
Packit 14c646
uuencode_it (\$utf8, "Short 8 bit utf8 data");
Packit 14c646
Packit 14c646
my $utf8b = $utf8;
Packit 14c646
utf8::encode ($utf8b);
Packit 14c646
Packit 14c646
uuencode_it (\$utf8b, "Short 8 bit utf8 data as bytes");
Packit 14c646
Packit 14c646
$utf8 x= 256;
Packit 14c646
Packit 14c646
uuencode_it (\$utf8, "Long 8 bit utf8 data");
Packit 14c646
Packit 14c646
$utf8 = "\x{C0FFEE}";
Packit 14c646
Packit 14c646
uuencode_it (\$utf8, "Short 24 bit utf8 data");
Packit 14c646
Packit 14c646
$utf8b = $utf8;
Packit 14c646
utf8::encode ($utf8b);
Packit 14c646
Packit 14c646
uuencode_it (\$utf8b, "Short 24 bit utf8 data as bytes");
Packit 14c646
Packit 14c646
$utf8 x= 256;
Packit 14c646
Packit 14c646
uuencode_it (\$utf8, "Long 24 bit utf8 data");
Packit 14c646
Packit 14c646
# Hash which has the utf8 bit set, but no longer has any utf8 keys
Packit 14c646
my %uhash = ("\x{100}", "gone", "perl", "rules");
Packit 14c646
delete $uhash{"\x{100}"};
Packit 14c646
Packit 14c646
# use Devel::Peek; Dump \%uhash;
Packit 14c646
uuencode_it (\%uhash, "Hash with utf8 flag but no utf8 keys");
Packit 14c646
Packit 14c646
$utf8 = "Schlo\xdf" . chr 256;
Packit 14c646
chop $utf8;
Packit 14c646
my $a_circumflex = (ord ('A') == 193 ? "\x47" : "\xe5");
Packit 14c646
%uhash = (map {$_, $_} 'castle', "ch${a_circumflex}teau", $utf8, "\x{57CE}");
Packit 14c646
Packit 14c646
uuencode_it (\%uhash, "Hash with utf8 keys");
Packit 14c646
Packit 14c646
lock_hash %uhash;
Packit 14c646
Packit 14c646
uuencode_it (\%uhash, "Locked hash with utf8 keys");
Packit 14c646
Packit 14c646
my (%pre56, %pre58);
Packit 14c646
Packit 14c646
while (my ($key, $val) = each %uhash) {
Packit 14c646
  # hash keys are always stored downgraded to bytes if possible, with a flag
Packit 14c646
  # to say "promote back to utf8"
Packit 14c646
  # Whereas scalars are stored as is.
Packit 14c646
  utf8::encode ($key) if ord $key > 256;
Packit 14c646
  $pre58{$key} = $val;
Packit 14c646
  utf8::encode ($val) unless $val eq "ch\xe5teau";
Packit 14c646
  $pre56{$key} = $val;
Packit 14c646
Packit 14c646
}
Packit 14c646
uuencode_it (\%pre56, "Hash with utf8 keys for pre 5.6");
Packit 14c646
uuencode_it (\%pre58, "Hash with utf8 keys for 5.6");