#!./perl
BEGIN {
    chdir 't' if -d 't';
    require './test.pl';
    set_up_inc('../lib');
}
$|=1;
{
    my $wide = v256;
    use bytes;
    my $ordwide = ord($wide);
    printf "# under use bytes ord(v256) = 0x%02x\n", $ordwide;
    skip_all('UTF-8-centric tests (not valid for UTF-EBCDIC)') if $ordwide == 140;
    # This could be ported to EBCDIC, but a lot of trouble.
    # ext/XS-APItest/t/utf8.t contains comprehensive tests for both platforms
    if ($ordwide != 196) {
        printf "# v256 starts with 0x%02x\n", $ordwide;
    }
}
no utf8;
my $is64bit = length sprintf("%x", ~0) > 8;
foreach (<DATA>) {
    if (/^(?:\d+(?:\.\d+)?)\s/ || /^#/) {
        # print "# $_\n";
    } elsif (my ($id, $okay, $Unicode, $byteslen, $hex, $charslen, $experr)
             = /^(\d+\.\d+\.\d+[bu]?)   # ID
                \s+(y|n|N-?\d+(?:,\d+)?)  # expect to pass or fail
                                          # 'n' means expect one diagnostic
                                          # 'N\d+'     means expect this
                                          #            number of diagnostics
                                          # 'N\d+,\d+' means expect the first
                                          #            number of diagnostics
                                          #            on a 32-bit system; the
                                          #            second number on a
                                          #            64-bit one
                \s+([0-9a-f]{1,8}(?:,[0-9a-f]{1,8})*|-) # Unicode characters
                \s+(\d+)                # number of octets
                \s+([0-9a-f]{2}(?::[0-9a-f]{2})*)       # octets in hex
                \s+(\d+|-)              # number of characters
                (?:\s+(.+))?            # expected error (or comment)
                $/x) {
        my @hex = split(/:/, $hex);
        is(scalar @hex, $byteslen, 'Amount of hex tallies with byteslen');
        my $octets = join '', map {chr hex $_} @hex;
        is(length $octets, $byteslen, 'Number of octets tallies with byteslen');
        if ($okay eq 'y') {
            my @chars = map {hex $_} split ',', $Unicode;
            is(scalar @chars, $charslen, 'Amount of hex tallies with charslen');
            my @got;
            warning_is(sub {@got = unpack 'C0U*', $octets}, undef,
                       "No warnings expected for $id");
            is("@got", "@chars", 'Got expected Unicode characters');
        } elsif ($okay eq 'n') {
            isnt($experr, '', "Expected warning for $id provided");
            warnings_like(sub {unpack 'C0U*', $octets}, [qr/$experr/],
                         "Only expected warning for $id");
        } elsif ($okay !~ /^N-?(\d+)(?:,(\d+))?/) {
            is($okay, 'n', "Confused test description for $id");
        } else {
            my $expect32 = $1;
            my $expect64 = $2 // $expect32;
            my $expect = ($is64bit) ? $expect64 : $expect32;
            my @warnings;
            {
                local $SIG{__WARN__} = sub {
                    print "# $id: @_";
                    push @warnings, "@_";
                };
                unpack 'C0U*', $octets;
            }
            unless (is(scalar @warnings, $expect, "Expected number of warnings for $id seen")) {
                note(join "", "Got:\n", @warnings);
            }
            isnt($experr, '', "Expected first warning for $id provided");
            my $message;
            my $after = "";
            if ($expect64 < $expect32 && ! $is64bit) {
                # This is needed for code points above IV_MAX
                #if (       substr($octets, 0, 1) gt "\xfe"
                #    || (   substr($octets, 0, 1) eq "\xfe"
                #        && length $octets > 1
                #        && substr($octets, 1, 1) le "\xbf"
                #        && substr($octets, 1, 1) ge "\x80"))
                #{
                    like($warnings[0], qr/overflow/, "overflow warning for $id seen");
                    shift @warnings;
                    $after .= "overflow";
                #}
            }
            # The data below assumes that if there is both a 'short' and
            # 'non-continuation' malformation, the latter has precedence.  But
            # that has changed, and rather than mess with the data, this works
            # around that.
            if (   @warnings > 1
                && $warnings[0] =~ /short/
                && $warnings[1] =~ /unexpected non-continuation/)
            {
                $after .= " and " if $after;
                $after .= "short";
                shift @warnings;
            }
            $after = "after $after " if $after;
            like($warnings[0], qr/$experr/, "Expected first warning ${after}for $id seen");
            local $::TODO;
            if ($expect < 0) {
                $expect = -$expect;
                $::TODO = "Markus Kuhn states that $expect invalid sequences should be signalled";
            }
        }
    } else {
        fail("unknown format '$_'");
    }
}
done_testing();
# This table is based on Markus Kuhn's UTF-8 Decode Stress Tester,
# http://www.cl.cam.ac.uk/~mgk25/ucs/examples/UTF-8-test.txt,
# version dated 2015-08-28.
#
# See the code that parses these lines for comments as to the column meanings
__DATA__
1       Correct UTF-8
1.1.1 y 3ba,1f79,3c3,3bc,3b5    11      ce:ba:e1:bd:b9:cf:83:ce:bc:ce:b5        5
2       Boundary conditions
2.1     First possible sequence of certain length
2.1.1 y 0               1       00      1
2.1.2 y 80              2       c2:80   1
2.1.3 y 800             3       e0:a0:80        1
2.1.4 y 10000           4       f0:90:80:80     1
2.1.5 y 200000          5       f8:88:80:80:80  1
2.1.6 y 4000000         6       fc:84:80:80:80:80       1
2.2     Last possible sequence of certain length
2.2.1 y 7f              1       7f      1
2.2.2 y 7ff             2       df:bf   1
# The ffff is legal by default since 872c91ae155f6880
2.2.3 y ffff            3       ef:bf:bf        1       character 0xffff
2.2.4 y 1fffff          4       f7:bf:bf:bf     1
2.2.5 y 3ffffff         5       fb:bf:bf:bf:bf  1
2.2.6 y 7fffffff        6       fd:bf:bf:bf:bf:bf       1
2.3     Other boundary conditions
2.3.1 y d7ff            3       ed:9f:bf        1
2.3.2 y e000            3       ee:80:80        1
2.3.3 y fffd            3       ef:bf:bd        1
2.3.4 y 10ffff          4       f4:8f:bf:bf     1
2.3.5 y 110000          4       f4:90:80:80     1
3       Malformed sequences
3.1     Unexpected continuation bytes
3.1.1 n -               1       80      -       unexpected continuation byte 0x80
3.1.2 n -               1       bf      -       unexpected continuation byte 0xbf
3.1.3 N2 -              2       80:bf   -       unexpected continuation byte 0x80
3.1.4 N3 -              3       80:bf:80        -       unexpected continuation byte 0x80
3.1.5 N4 -              4       80:bf:80:bf     -       unexpected continuation byte 0x80
3.1.6 N5 -              5       80:bf:80:bf:80  -       unexpected continuation byte 0x80
3.1.7 N6 -              6       80:bf:80:bf:80:bf       -       unexpected continuation byte 0x80
3.1.8 N7 -              7       80:bf:80:bf:80:bf:80    -       unexpected continuation byte 0x80
3.1.9 N64 -     64      80:81:82:83:84:85:86:87:88:89:8a:8b:8c:8d:8e:8f:90:91:92:93:94:95:96:97:98:99:9a:9b:9c:9d:9e:9f:a0:a1:a2:a3:a4:a5:a6:a7:a8:a9:aa:ab:ac:ad:ae:af:b0:b1:b2:b3:b4:b5:b6:b7:b8:b9:ba:bb:bc:bd:be:bf -       unexpected continuation byte 0x80
3.2     Lonely start characters
3.2.1 N34 -     64      c0:20:c1:20:c2:20:c3:20:c4:20:c5:20:c6:20:c7:20:c8:20:c9:20:ca:20:cb:20:cc:20:cd:20:ce:20:cf:20:d0:20:d1:20:d2:20:d3:20:d4:20:d5:20:d6:20:d7:20:d8:20:d9:20:da:20:db:20:dc:20:dd:20:de:20:df:20 -       unexpected non-continuation byte 0x20, immediately after start byte 0xc0
3.2.2 N17 -     32      e0:20:e1:20:e2:20:e3:20:e4:20:e5:20:e6:20:e7:20:e8:20:e9:20:ea:20:eb:20:ec:20:ed:20:ee:20:ef:20 -       unexpected non-continuation byte 0x20, immediately after start byte 0xe0
3.2.3 N9 -      16      f0:20:f1:20:f2:20:f3:20:f4:20:f5:20:f6:20:f7:20 -       unexpected non-continuation byte 0x20, immediately after start byte 0xf0
3.2.4 N6 -      8       f8:20:f9:20:fa:20:fb:20 -       unexpected non-continuation byte 0x20, immediately after start byte 0xf8
3.2.5 N4 -      4       fc:20:fd:20     -       unexpected non-continuation byte 0x20, immediately after start byte 0xfc
3.3     Sequences with last continuation byte missing
3.3.1 N2 -      1       c0      -       1 byte available, need 2
3.3.2 N2 -      2       e0:80   -       2 bytes available, need 3
3.3.3 N2 -      3       f0:80:80        -       3 bytes available, need 4
3.3.4 N2 -      4       f8:80:80:80     -       4 bytes available, need 5
3.3.5 N2 -      5       fc:80:80:80:80  -       5 bytes available, need 6
3.3.6 n -       1       df      -       1 byte available, need 2
3.3.7 n -       2       ef:bf   -       2 bytes available, need 3
3.3.8 n -       3       f7:bf:bf        -       3 bytes available, need 4
3.3.9 n -       4       fb:bf:bf:bf     -       4 bytes available, need 5
3.3.10 n -      5       fd:bf:bf:bf:bf  -       5 bytes available, need 6
3.4     Concatenation of incomplete sequences
3.4.1 N15 -     30      c0:e0:80:f0:80:80:f8:80:80:80:fc:80:80:80:80:df:ef:bf:f7:bf:bf:fb:bf:bf:bf:fd:bf:bf:bf:bf       -       unexpected non-continuation byte 0xe0, immediately after start byte 0xc0
3.5     Impossible bytes (but not with Perl's extended UTF-8)
3.5.1 n -       1       fe      -       1 byte available, need 7
3.5.2 n -       1       ff      -       1 byte available, need 13
3.5.3 N7 -      4       fe:fe:ff:ff     -       byte 0xfe
4       Overlong sequences
4.1     Examples of an overlong ASCII character
4.1.1 n -       2       c0:af   -       overlong
4.1.2 n -       3       e0:80:af        -       overlong
4.1.3 n -       4       f0:80:80:af     -       overlong
4.1.4 n -       5       f8:80:80:80:af  -       overlong
4.1.5 n -       6       fc:80:80:80:80:af       -       overlong
4.2     Maximum overlong sequences
4.2.1 n -       2       c1:bf   -       overlong
4.2.2 n -       3       e0:9f:bf        -       overlong
4.2.3 n -       4       f0:8f:bf:bf     -       overlong
4.2.4 n -       5       f8:87:bf:bf:bf  -       overlong
4.2.5 n -       6       fc:83:bf:bf:bf:bf       -       overlong
4.3     Overlong representation of the NUL character
4.3.1 n -       2       c0:80   -       overlong
4.3.2 n -       3       e0:80:80        -       overlong
4.3.3 n -       4       f0:80:80:80     -       overlong
4.3.4 n -       5       f8:80:80:80:80  -       overlong
4.3.5 n -       6       fc:80:80:80:80:80       -       overlong
5       Illegal code positions
5.1     Single UTF-16 surrogates
5.1.1 y d800    3       ed:a0:80        1       UTF-16 surrogate 0xd800
5.1.2 y db7f    3       ed:ad:bf        1       UTF-16 surrogate 0xdb7f
5.1.3 y db80    3       ed:ae:80        1       UTF-16 surrogate 0xdb80
5.1.4 y dbff    3       ed:af:bf        1       UTF-16 surrogate 0xdbff
5.1.5 y dc00    3       ed:b0:80        1       UTF-16 surrogate 0xdc00
5.1.6 y df80    3       ed:be:80        1       UTF-16 surrogate 0xdf80
5.1.7 y dfff    3       ed:bf:bf        1       UTF-16 surrogate 0xdfff
5.2     Paired UTF-16 surrogates
5.2.1 y d800,dc00       6       ed:a0:80:ed:b0:80       2       UTF-16 surrogates 0xd800, dc00
5.2.2 y d800,dfff       6       ed:a0:80:ed:bf:bf       2       UTF-16 surrogates 0xd800, dfff
5.2.3 y db7f,dc00       6       ed:ad:bf:ed:b0:80       2       UTF-16 surrogates 0xdb7f, dc00
5.2.4 y db7f,dfff       6       ed:ad:bf:ed:bf:bf       2       UTF-16 surrogates 0xdb7f, dfff
5.2.5 y db80,dc00       6       ed:ae:80:ed:b0:80       2       UTF-16 surrogates 0xdb80, dc00
5.2.6 y db80,dfff       6       ed:ae:80:ed:bf:bf       2       UTF-16 surrogates 0xdb80, dfff
5.2.7 y dbff,dc00       6       ed:af:bf:ed:b0:80       2       UTF-16 surrogates 0xdbff, dc00
5.2.8 y dbff,dfff       6       ed:af:bf:ed:bf:bf       2       UTF-16 surrogates 0xdbff, dfff
5.3     Other illegal code positions
5.3.1 y fffe    3       ef:bf:be        1       byte order mark 0xfffe
# The ffff is legal by default since 872c91ae155f6880
5.3.2 y ffff    3       ef:bf:bf        1       non-character 0xffff
5.3.3 y fdd0    3       ef:b7:90        1       non-character 0xfdd0
5.3.3 y fdd1    3       ef:b7:91        1       non-character 0xfdd1
5.3.3 y fdd2    3       ef:b7:92        1       non-character 0xfdd2
5.3.3 y fdd3    3       ef:b7:93        1       non-character 0xfdd3
5.3.3 y fdd4    3       ef:b7:94        1       non-character 0xfdd4
5.3.3 y fdd5    3       ef:b7:95        1       non-character 0xfdd5
5.3.3 y fdd6    3       ef:b7:96        1       non-character 0xfdd6
5.3.3 y fdd7    3       ef:b7:97        1       non-character 0xfdd7
5.3.3 y fdd8    3       ef:b7:98        1       non-character 0xfdd8
5.3.3 y fdd9    3       ef:b7:99        1       non-character 0xfdd9
5.3.3 y fdda    3       ef:b7:9a        1       non-character 0xfdda
5.3.3 y fddb    3       ef:b7:9b        1       non-character 0xfddb
5.3.3 y fddc    3       ef:b7:9c        1       non-character 0xfddc
5.3.3 y fddd    3       ef:b7:9d        1       non-character 0xfddd
5.3.3 y fdde    3       ef:b7:9e        1       non-character 0xfdde
5.3.3 y fddf    3       ef:b7:9f        1       non-character 0xfddf
5.3.3 y fde0    3       ef:b7:a0        1       non-character 0xfde0
5.3.3 y fde1    3       ef:b7:a1        1       non-character 0xfde1
5.3.3 y fde2    3       ef:b7:a2        1       non-character 0xfde2
5.3.3 y fde3    3       ef:b7:a3        1       non-character 0xfde3
5.3.3 y fde4    3       ef:b7:a4        1       non-character 0xfde4
5.3.3 y fde5    3       ef:b7:a5        1       non-character 0xfde5
5.3.3 y fde6    3       ef:b7:a6        1       non-character 0xfde6
5.3.3 y fde7    3       ef:b7:a7        1       non-character 0xfde7
5.3.3 y fde8    3       ef:b7:a8        1       non-character 0xfde8
5.3.3 y fde9    3       ef:b7:a9        1       non-character 0xfde9
5.3.3 y fdea    3       ef:b7:aa        1       non-character 0xfdea
5.3.3 y fdeb    3       ef:b7:ab        1       non-character 0xfdeb
5.3.3 y fdec    3       ef:b7:ac        1       non-character 0xfdec
5.3.3 y fded    3       ef:b7:ad        1       non-character 0xfded
5.3.3 y fdee    3       ef:b7:ae        1       non-character 0xfdee
5.3.3 y fdef    3       ef:b7:af        1       non-character 0xfdef
5.3.4 y 1fffe   4       f0:9f:bf:be     1       non-character 0x1fffe
5.3.4 y 1ffff   4       f0:9f:bf:bf     1       non-character 0x1ffff
5.3.4 y 2fffe   4       f0:af:bf:be     1       non-character 0x2fffe
5.3.4 y 2ffff   4       f0:af:bf:bf     1       non-character 0x2ffff
5.3.4 y 3fffe   4       f0:bf:bf:be     1       non-character 0x3fffe
5.3.4 y 3ffff   4       f0:bf:bf:bf     1       non-character 0x3ffff
5.3.4 y 4fffe   4       f1:8f:bf:be     1       non-character 0x4fffe
5.3.4 y 4ffff   4       f1:8f:bf:bf     1       non-character 0x4ffff
5.3.4 y 5fffe   4       f1:9f:bf:be     1       non-character 0x5fffe
5.3.4 y 5ffff   4       f1:9f:bf:bf     1       non-character 0x5ffff
5.3.4 y 6fffe   4       f1:af:bf:be     1       non-character 0x6fffe
5.3.4 y 6ffff   4       f1:af:bf:bf     1       non-character 0x6ffff
5.3.4 y 7fffe   4       f1:bf:bf:be     1       non-character 0x7fffe
5.3.4 y 7ffff   4       f1:bf:bf:bf     1       non-character 0x7ffff
5.3.4 y 8fffe   4       f2:8f:bf:be     1       non-character 0x8fffe
5.3.4 y 8ffff   4       f2:8f:bf:bf     1       non-character 0x8ffff
5.3.4 y 9fffe   4       f2:9f:bf:be     1       non-character 0x9fffe
5.3.4 y 9ffff   4       f2:9f:bf:bf     1       non-character 0x9ffff
5.3.4 y afffe   4       f2:af:bf:be     1       non-character 0xafffe
5.3.4 y affff   4       f2:af:bf:bf     1       non-character 0xaffff
5.3.4 y bfffe   4       f2:bf:bf:be     1       non-character 0xbfffe
5.3.4 y bffff   4       f2:bf:bf:bf     1       non-character 0xbffff
5.3.4 y cfffe   4       f3:8f:bf:be     1       non-character 0xcfffe
5.3.4 y cffff   4       f3:8f:bf:bf     1       non-character 0xcffff
5.3.4 y dfffe   4       f3:9f:bf:be     1       non-character 0xdfffe
5.3.4 y dffff   4       f3:9f:bf:bf     1       non-character 0xdffff
5.3.4 y efffe   4       f3:af:bf:be     1       non-character 0xefffe
5.3.4 y effff   4       f3:af:bf:bf     1       non-character 0xeffff
5.3.4 y ffffe   4       f3:bf:bf:be     1       non-character 0xffffe
5.3.4 y fffff   4       f3:bf:bf:bf     1       non-character 0xfffff
5.3.4 y 10fffe  4       f4:8f:bf:be     1       non-character 0x10fffe
5.3.4 y 10ffff  4       f4:8f:bf:bf     1       non-character 0x10ffff