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;