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|
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,
} => $class;
}
# NOTE: utf8.c:swash_init() assumes entries are never modified once generated.
sub SWASHGET {
my ($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 < $start;
# print "$min $max $val\n";
if ($none) {
if ($min < $start) {
$val += $start - $min if $val < $none;
$min = $start;
}
for ($key = $min; $key <= $max; $key++) {
last LINE if $key >= $end;
# print STDERR "$key => $val\n" if $DEBUG;
vec($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 >= $end;
# print STDERR "$key => $val\n" if $DEBUG;
vec($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 >= $end;
# print STDERR "$key => 1\n" if $DEBUG;
vec($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;
|
