package utf8;
+use strict;
+use warnings;
sub DEBUG () { 0 }
sub DESTROY {}
+my %Cache;
+
sub croak { require Carp; Carp::croak(@_) }
+##
+## "SWASH" == "SWATCH HASH". A "swatch" is a swatch of the Unicode landscape.
+## It's a data structure that encodes a set of Unicode characters.
+##
+
sub SWASHNEW {
my ($class, $type, $list, $minbits, $none) = @_;
local $^D = 0 if $^D;
print STDERR "SWASHNEW @_\n" if DEBUG;
- if ($type and ref ${"${class}::{$type}"} eq $class) {
- warn qq/Found \${"${class}::{$type}"}\n/ if DEBUG;
- return ${"${class}::{$type}"}; # Already there...
- }
+ ##
+ ## Get the list of codepoints for the type.
+ ## Called from utf8.c
+ ##
+ ## Given a $type, our goal is to fill $list with the set of codepoint
+ ## ranges.
+ ##
+ ## To make the parsing of $type clear, this code takes the a rather
+ ## unorthodox approach of last'ing out of the block once we have the
+ ## info we need. Were this to be a subroutine, the 'last' would just
+ ## be a 'return'.
+ ##
+ my $file; ## file to load data from, and also part of the %Cache key.
+ my $ListSorted = 0;
- if ($type) {
- $type =~ s/^\s+//;
- $type =~ s/\s+$//;
-
- print "type = $type\n" if DEBUG;
-
- my $file;
-
- unless (defined $file) {
- defined %utf8::Is || do "unicore/Is.pl";
- if ($type =~ /^(?:Is)?[- _]?([A-Z].*)$/i) {
- my $istype = $1;
- print "istype = $istype\n" if DEBUG;
- unless ($list = do "unicore/Is/$istype.pl") {
- if (exists $utf8::Is{$istype}) {
- $file = "unicore/Is/$utf8::Is{$istype}";
- } else {
- my $isprefix = substr(lc($istype), 0, 2);
- print "isprefix = $isprefix\n" if DEBUG;
- if (exists $utf8::IsPat{$isprefix}) {
- my $Is = $istype;
- print "isprefix = $isprefix, Is = $Is\n" if DEBUG;
- for my $k (keys %{$utf8::IsPat{$isprefix}}) {
- print "isprefix = $isprefix, Is = $Is, k = $k\n" if DEBUG;
- if ($Is =~ /^$k$/i) {
- $file = "unicore/Is/$utf8::IsPat{$isprefix}->{$k}";
- print "isprefix = $isprefix, Is = $Is, k = $k, file = $file\n" if DEBUG;
- last;
- }
- }
- }
- }
- }
- }
-
- unless (defined $file) {
- defined %utf8::In || do "unicore/In.pl";
- $type = 'Lampersand' if $type =~ /^(?:Is)?L&$/;
- if ($type =~ /^(?:In)?[- _]?(?!herited$)(.+)/i) {
- my $intype = $1;
- print "intype = $intype\n" if DEBUG;
- if (exists $utf8::Is{$istype}) {
- $file = "unicore/In/$utf8::In{$intype}";
- } else {
- my $inprefix = substr(lc($intype), 0, 2);
- print "inprefix = $inprefix\n" if DEBUG;
- if (exists $utf8::InPat{$inprefix}) {
- my $In = $intype;
- print "inprefix = $inprefix, In = $In\n" if DEBUG;
- for my $k (keys %{$utf8::InPat{$inprefix}}) {
- print "inprefix = $inprefix, In = $In, k = $k\n" if DEBUG;
- if ($In =~ /^$k$/i) {
- $file = "unicore/In/$utf8::InPat{$inprefix}->{$k}";
- print "inprefix = $inprefix, In = $In, k = $k, file = $file\n" if DEBUG;
- last;
- }
- }
- }
- }
+ if ($type)
+ {
+ $type =~ s/^\s+//;
+ $type =~ s/\s+$//;
+
+ print "type = $type\n" if DEBUG;
+
+ GETFILE:
+ {
+ ##
+ ## 'Is' is always optional, so if it's there, remove it.
+ ## Same with 'Category=' and 'Script='.
+ ##
+ ## 'Block=' is replaced by 'In'.
+ ##
+ my $wasIs;
+
+ ($wasIs = $type =~ s/^Is(?:\s+|[-_])?//i)
+ or
+ $type =~ s/^Category\s*=\s*//i
+ or
+ $type =~ s/^Script\s*=\s*//i
+ or
+ $type =~ s/^Block\s*=\s*/In/i;
+
+ ##
+ ## See if it's in the direct mapping table.
+ ##
+ require "unicore/Exact.pl";
+ if (my $base = $utf8::Exact{$type}) {
+ $file = "unicore/lib/$base.pl";
+ last GETFILE;
+ }
+
+ ##
+ ## If not there exactly, try the canonical form. The canonical
+ ## form is lowercased, with any separators (\s+|[-_]) removed.
+ ##
+ my $canonical = lc $type;
+ $canonical =~ s/(?<=[a-z\d])(?:\s+|[-_])(?=[a-z\d])//g;
+ print "canonical = $canonical\n" if DEBUG;
+
+ require "unicore/Canonical.pl";
+ if (my $base = $utf8::Canonical{$canonical}) {
+ $file = "unicore/lib/$base.pl";
+ last GETFILE;
+ }
+
+ ##
+ ## It could be a user-defined property.
+ ##
+
+ my $caller1 = caller(1);
+
+ if (defined $caller1 && $type =~ /^(?:\w+)$/) {
+ my $prop = $caller1 . "::" . ( $wasIs ? "Is" : "" ) . $type;
+ if (exists &{$prop}) {
+ no strict 'refs';
+
+ $list = &{$prop};
+ last GETFILE;
}
}
- unless (defined $file) {
- if ($type =~ /^To([A-Z][A-Za-z]+)$/) {
- $file = "unicore/To/$1";
+ ##
+ ## See if it's a user-level "To".
+ ##
+
+ my $caller0 = caller(0);
+
+ if (defined $caller0 && $type =~ /^To(?:\w+)$/) {
+ my $map = $caller0 . "::" . $type;
+ if (exists &{$map}) {
+ no strict 'refs';
+
+ $list = &{$map};
+ last GETFILE;
}
}
- }
+
+ ##
+ ## Last attempt -- see if it's a standard "To" name
+ ## (e.g. "ToLower") ToTitle is used by ucfirst().
+ ## The user-level way to access ToDigit() and ToFold()
+ ## is to use Unicode::UCD.
+ ##
+ if ($type =~ /^To(Digit|Fold|Lower|Title|Upper)$/)
+ {
+ $file = "unicore/To/$1.pl";
+ ## would like to test to see if $file actually exists....
+ last GETFILE;
+ }
+
+ ##
+ ## If we reach this line, it's because we couldn't figure
+ ## out what to do with $type. Ouch.
+ ##
+
+ return $type;
+ }
if (defined $file) {
- $list = do "$file.pl";
+ print "found it (file='$file')\n" if DEBUG;
+
+ ##
+ ## If we reach here, it was due to a 'last GETFILE' above
+ ## (exception: user-defined properties and mappings), so we
+ ## have a filename, so now we load it if we haven't already.
+ ## If we have, return the cached results. The cache key is the
+ ## file to load.
+ ##
+ if ($Cache{$file} and ref($Cache{$file}) eq $class)
+ {
+ print "Returning cached '$file' for \\p{$type}\n" if DEBUG;
+ return $Cache{$class, $file};
+ }
+
+ $list = do $file;
}
- croak("Can't find Unicode character property \"$type\"")
- unless $list;
+ $ListSorted = 1; ## we know that these lists are sorted
}
my $extras;
my $bits;
-
+
+ my $ORIG = $list;
if ($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
+ map { $_->[1] }
+ sort { $a->[0] <=> $b->[0] }
+ map { /^([0-9a-fA-F]+)/; [ hex($1), $_ ] }
+ grep { /^([0-9a-fA-F]+)/ and not $seen{$1}++ } @tmp; # XXX doesn't do ranges right
}
if ($none) {
if ($minbits < 32) {
my $top = 0;
- while ($list =~ /^([0-9a-fA-F]+)(?:\t([0-9a-fA-F]+)?)(?:\t([0-9a-fA-F]+))?/mg) {
+ 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 : "");
+ my $max = defined $2 ? hex $2 : $min;
+ my $val = defined $3 ? hex $3 : 0;
$val += $max - $min if defined $3;
$top = $val if $val > $top;
}
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);
+ my $subobj;
+ if ($c eq 'utf8') {
+ $subobj = $c->SWASHNEW($t, "", 0, 0, 0);
+ }
+ elsif ($c =~ /^([0-9a-fA-F]+)/) {
+ $subobj = utf8->SWASHNEW("", $c, 0, 0, 0);
+ }
+ return $subobj unless ref $subobj;
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 {
+ my $SWASH = bless {
TYPE => $type,
BITS => $bits,
EXTRAS => $extras,
NONE => $none,
@extras,
} => $class;
+
+ if ($file) {
+ $Cache{$class, $file} = $SWASH;
+ }
+
+ return $SWASH;
}
# NOTE: utf8.c:swash_init() assumes entries are never modified once generated.
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 $3;
+ while (/^([0-9a-fA-F]+)(?:[ \t]([0-9a-fA-F]+)?)?(?:[ \t]([0-9a-fA-F]+))?/mg) {
+ chomp;
+ my ($a, $b, $c) = ($1, $2, $3);
+ croak "$type: illegal mapping '$_'"
+ if $type =~ /^To/ &&
+ !(defined $a && defined $c);
+ my $min = hex $a;
+ my $max = defined $b ? hex $b : $min;
+ my $val = defined $c ? hex $c : 0;
next if $max < $start;
print "$min $max $val\n" if DEBUG;
if ($none) {
}
else {
LINE:
- while (/^([0-9a-fA-F]+)(?:\t([0-9a-fA-F]+))?/mg) {
+ while (/^([0-9a-fA-F]+)(?:[ \t]+([0-9a-fA-F]+))?/mg) {
+ chomp;
my $min = hex $1;
- my $max = (defined $2 ? hex $2 : $min);
+ my $max = defined $2 ? hex $2 : $min;
next if $max < $start;
if ($min < $start) {
$min = $start;
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