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package utf8;
use strict;
use warnings;
sub DEBUG () { 0 }
sub DESTROY {}
my %Cache;
our (%PropertyAlias, %PA_reverse, %PropValueAlias, %PVA_reverse, %PVA_abbr_map);
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;
##
## Get the list of codepoints for the type.
## Called from swash_init (see utf8.c) or SWASHNEW itself.
##
## Callers of swash_init:
## op.c:pmtrans -- for tr/// and y///
## regexec.c:regclass_swash -- for /[]/, \p, and \P
## utf8.c:is_utf8_common -- for common Unicode properties
## utf8.c:to_utf8_case -- for lc, uc, ucfirst, etc. and //i
##
## Given a $type, our goal is to fill $list with the set of codepoint
## ranges. If $type is false, $list passed is used.
##
## $minbits:
## For binary properties, $minbits must be 1.
## For character mappings (case and transliteration), $minbits must
## be a number except 1.
##
## $list (or that filled according to $type):
## Refer to perlunicode.pod, "User-Defined Character Properties."
##
## For binary properties, only characters with the property value
## of True should be listed. The 3rd column, if any, will be ignored.
##
## 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 STDERR "type = $type\n" if DEBUG;
GETFILE:
{
##
## It could be a user-defined property.
##
my $caller1 = $type =~ s/(.+)::// ? $1 : caller(1);
if (defined $caller1 && $type =~ /^(?:\w+)$/) {
my $prop = "${caller1}::$type";
if (exists &{$prop}) {
no strict 'refs';
$list = &{$prop};
last GETFILE;
}
}
my $wasIs;
($wasIs = $type =~ s/^Is(?:\s+|[-_])?//i)
or
$type =~ s/^(?:(?:General(?:\s+|_)?)?Category|gc)\s*[:=]\s*//i
or
$type =~ s/^(?:Script|sc)\s*[:=]\s*//i
or
$type =~ s/^Block\s*[:=]\s*/In/i;
##
## See if it's in some enumeration.
##
require "unicore/PVA.pl";
if ($type =~ /^([\w\s]+)[:=]\s*(.*)/) {
my ($enum, $val) = (lc $1, lc $2);
$enum =~ tr/ _-//d;
$val =~ tr/ _-//d;
my $pa = $PropertyAlias{$enum} ? $enum : $PA_reverse{$enum};
my $f = $PropValueAlias{$pa}{$val} ? $val : $PVA_reverse{$pa}{lc $val};
if ($pa and $f) {
$pa = "gc_sc" if $pa eq "gc" or $pa eq "sc";
$file = "unicore/lib/$pa/$PVA_abbr_map{$pa}{lc $f}.pl";
last GETFILE;
}
}
else {
my $t = lc $type;
$t =~ tr/ _-//d;
if ($PropValueAlias{gc}{$t} or $PropValueAlias{sc}{$t}) {
$file = "unicore/lib/gc_sc/$PVA_abbr_map{gc_sc}{$t}.pl";
last GETFILE;
}
}
##
## See if it's in the direct mapping table.
##
require "unicore/Exact.pl";
if (my $base = $utf8::Exact{$type}) {
$file = "unicore/lib/gc_sc/$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 STDERR "canonical = $canonical\n" if DEBUG;
require "unicore/Canonical.pl";
if (my $base = ($utf8::Canonical{$canonical} || $utf8::Canonical{ lc $utf8::PropertyAlias{$canonical} })) {
$file = "unicore/lib/gc_sc/$base.pl";
last GETFILE;
}
##
## 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 $file) {
print STDERR "found it (file='$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
## class and file to load.
##
my $found = $Cache{$class, $file};
if ($found and ref($found) eq $class) {
print STDERR "Returning cached '$file' for \\p{$type}\n" if DEBUG;
return $found;
}
$list = do $file; die $@ if $@;
}
$ListSorted = 1; ## we know that these lists are sorted
}
my $extras;
my $bits = $minbits;
my $ORIG = $list;
if ($list) {
my @tmp = split(/^/m, $list);
my %seen;
no warnings;
$extras = join '', grep /^[^0-9a-fA-F]/, @tmp;
$list = join '',
map { $_->[1] }
sort { $a->[0] <=> $b->[0] }
map { /^([0-9a-fA-F]+)/; [ CORE::hex($1), $_ ] }
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 != 1 && $minbits < 32) { # not binary property
my $top = 0;
while ($list =~ /^([0-9a-fA-F]+)(?:[\t]([0-9a-fA-F]+)?)(?:[ \t]([0-9a-fA-F]+))?/mg) {
my $min = CORE::hex $1;
my $max = defined $2 ? CORE::hex $2 : $min;
my $val = defined $3 ? CORE::hex $3 : 0;
$val += $max - $min if defined $3;
$top = $val if $val > $top;
}
my $topbits =
$top > 0xffff ? 32 :
$top > 0xff ? 16 : 8;
$bits = $topbits if $bits < $topbits;
}
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 $subobj;
if ($c eq 'utf8') {
$subobj = utf8->SWASHNEW($t, "", $minbits, 0);
}
elsif (exists &$name) {
$subobj = utf8->SWASHNEW($name, "", $minbits, 0);
}
elsif ($c =~ /^([0-9a-fA-F]+)/) {
$subobj = utf8->SWASHNEW("", $c, $minbits, 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;
my $SWASH = bless {
TYPE => $type,
BITS => $bits,
EXTRAS => $extras,
LIST => $list,
NONE => $none,
@extras,
} => $class;
if ($file) {
$Cache{$class, $file} = $SWASH;
}
return $SWASH;
}
# Now SWASHGET is recasted into a C function S_swash_get (see utf8.c).
1;
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