package utf8;

my $DEBUG = 0;

my $seq = "AAA0000";

sub DESTROY {}

sub croak { require Carp; Carp::croak(@_) }

sub SWASHNEW {

my ($class, $type, $list, $minbits, $none) = @_;

local $^D = 0 if $^D;

print STDERR "SWASHNEW @_\n" if $DEBUG;

my $extras;

my $bits;

if ($type and ref ${"${class}::{$type}"} eq $class) {

warn qq/Found \${"${class}::{$type}"}\n/ if $DEBUG;

return ${"${class}::{$type}"}; # Already there...

}

$type ||= $seq++;

my $caller;

my $i = 0;

while (($caller = caller($i)) eq __PACKAGE__) { $i++ }

my $encoding = $enc{$caller} || "unicode";

(my $file = $type) =~ s!::!/!g;

$file =~ s#^(I[sn]|To)([A-Z].*)#$1/$2#;

$list ||= eval { $caller->$type(); }

|| do "$file.pl"

|| do "$encoding/$file.pl"

|| do "$encoding/Is/${type}.pl"

|| croak("Can't find $encoding character property definition via $caller->$type or $file.pl");

$| = 1;

if ($list) {

my @tmp = split(/^/m, $list);

my %seen;

no warnings;

$extras = join '', grep /^[^0-9a-fA-F]/, @tmp;

$list = join '',

sort { hex $a <=> hex $b }

grep {/^([0-9a-fA-F]+)/ and not $seen{$1}++} @tmp; # XXX doesn't do ranges right

}

if ($none) {

my $hextra = sprintf "%04x", $none + 1;

$list =~ s/\tXXXX$/\t$hextra/mg;

}

if ($minbits < 32) {

my $top = 0;

while ($list =~ /^([0-9a-fA-F]+)(?:\t([0-9a-fA-F]+)?)(?:\t([0-9a-fA-F]+))?/mg) {

my $min = hex $1;

my $max = hex(defined $2 ? $2 : $1);

my $val = hex(defined $3 ? $3 : "");

$val += $max - $min if defined $3;

$top = $val if $val > $top;

}

$bits =

$top > 0xffff ? 32 :

$top > 0xff ? 16 :

$top > 1 ? 8 : 1

}

$bits = $minbits if $bits < $minbits;

my @extras;

for my $x ($extras) {

pos $x = 0;

while ($x =~ /^([^0-9a-fA-F\n])(.*)/mg) {

my $char = $1;

my $name = $2;

# print STDERR "$1 => $2\n" if $DEBUG;

if ($char =~ /[-+!]/) {

my ($c,$t) = split(/::/, $name, 2); # bogus use of ::, really

my $subobj = $c->SWASHNEW($t, "", 0, 0, 0);

push @extras, $name => $subobj;

$bits = $subobj->{BITS} if $bits < $subobj->{BITS};

}

}

}

print STDERR "CLASS = $class, TYPE => $type, BITS => $bits, NONE => $none\nEXTRAS =>\n$extras\nLIST =>\n$list\n" if $DEBUG;

${"${class}::{$type}"} = bless {

TYPE => $type,

BITS => $bits,

EXTRAS => $extras,

LIST => $list,

NONE => $none,

@extras,

} => $class;

}

sub SWASHGET {

my ($self, $start, $len) = @_;

local $^D = 0 if $^D;

my $type = $self->{TYPE};

my $bits = $self->{BITS};

my $none = $self->{NONE};

print STDERR "SWASHGET @_ [$type/$bits/$none]\n" if $DEBUG;

my $end = $start + $len;

my $swatch = "";

my $key;

vec($swatch, $len - 1, $bits) = 0; # Extend to correct length.

if ($none) {

for $key (0 .. $len - 1) { vec($swatch, $key, $bits) = $none }

}

for ($self->{LIST}) {

pos $_ = 0;

if ($bits > 1) {

LINE:

while (/^([0-9a-fA-F]+)(?:\t([0-9a-fA-F]+)?)(?:\t([0-9a-fA-F]+))?/mg) {

my $min = hex $1;

my $max = (defined $2 ? hex $2 : $min);

my $val = hex $3;

next if $max < $start;

if ($none) {

if ($min < $start) {

$val += $start - $min if $val < $none;

$min = $start;

}

for ($key = $min; $key <= $max; $key++) {

last LINE if $key >= $end;

vec($swatch, $key - $start, $bits) = $val;

++$val if $val < $none;

}

}

else {

if ($min < $start) {

$val += $start - $min;

$min = $start;

}

for ($key = $min; $key <= $max; $key++, $val++) {

last LINE if $key >= $end;

vec($swatch, $key - $start, $bits) = $val;

}

}

}

}

else {

LINE:

while (/^([0-9a-fA-F]+)(?:\t([0-9a-fA-F]+))?/mg) {

my $min = hex $1;

my $max = (defined $2 ? hex $2 : $min);

next if $max < $start;

if ($min < $start) {

$min = $start;

}

for ($key = $min; $key <= $max; $key++) {

last LINE if $key >= $end;

vec($swatch, $key - $start, 1) = 1;

}

}

}

}

for my $x ($self->{EXTRAS}) {

pos $x = 0;

while ($x =~ /^([-+!])(.*)/mg) {

my $char = $1;

my $name = $2;

print STDERR "INDIRECT $1 $2\n" if $DEBUG;

my $otherbits = $self->{$name}->{BITS};

croak("SWASHGET size mismatch") if $bits < $otherbits;

my $other = $self->{$name}->SWASHGET($start, $len);

if ($char eq '+') {

if ($bits == 1 and $otherbits == 1) {

$swatch |= $other;

}

else {

for ($key = 0; $key < $len; $key++) {

vec($swatch, $key, $bits) = vec($other, $key, $otherbits);

}

}

}

elsif ($char eq '!') {

if ($bits == 1 and $otherbits == 1) {

$swatch |= ~$other;

}

else {

for ($key = 0; $key < $len; $key++) {

if (!vec($other, $key, $otherbits)) {

vec($swatch, $key, $bits) = 1;

}

}

}

}

elsif ($char eq '-') {

if ($bits == 1 and $otherbits == 1) {

$swatch &= ~$other;

}

else {

for ($key = 0; $key < $len; $key++) {

if (vec($other, $key, $otherbits)) {

vec($swatch, $key, $bits) = 0;

}

}

}

}

}

}

if ($DEBUG) {

print STDERR "CELLS ";

for ($key = 0; $key < $len; $key++) {

print STDERR vec($swatch, $key, $bits), " ";

}

print STDERR "\n";

}

$swatch;

}

1;