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wakaba |
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#!/usr/bin/perl |
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use strict; |
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my $subtags; |
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my $langreg_source_file_name = shift; |
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{ |
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open my $langreg_source_file, '<', $langreg_source_file_name or |
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die "$0: $langreg_source_file_name: $!"; |
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local $/ = undef; |
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## NOTE: Based on RFC 4646 3.1.'s syntax, but more error-torelant. |
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for (split /\x0D?+\x0A%%\x0D?+\x0A/, <$langreg_source_file>) { |
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my $fields = [['' => '']]; |
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for (split /\x0D?+\x0A/, $_) { |
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if (/^\s/) { ## Part of continuous line |
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$fields->[-1]->[1] .= $_; |
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} elsif (s/^([^:\s]++)\s*+:\s*+//) { ## The first line of a |field| |
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push @$fields, [$1 => $_]; |
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} else { ## An errorneous line |
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push @$fields, ['' => $_]; |
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} |
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} |
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my $subtag; |
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shift @$fields if $fields->[0]->[1] eq ''; # remove dummy if unused |
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for (@$fields) { |
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$subtag->{$_->[0]} ||= []; |
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my $v = $_->[1]; |
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$v =~ s/&#x([0-9A-Fa-f]++);/chr hex $1/ge; |
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push @{$subtag->{$_->[0]}}, $v; |
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} |
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if ($subtags) { |
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my $tag_name_start = $subtag->{Subtag}->[0] || $subtag->{Tag}->[0]; |
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if ($tag_name_start =~ /^[A-Z][a-z]++(?>\.\.[A-Z][a-z]++)?+$/) { |
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$subtag->{_canon} = '_titlecase'; |
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} elsif ($tag_name_start =~ /^[A-Z]++(?>\.\.[A-Z]++)?+$/) { |
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$subtag->{_canon} = '_uppercase'; |
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} elsif ($tag_name_start =~ /^[a-z]++(?>\.\.[a-z]++)?+$/) { |
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$subtag->{_canon} = '_lowercase'; |
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} else { |
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$subtag->{_canon} = $tag_name_start; |
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} |
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$tag_name_start =~ tr/A-Z/a-z/; |
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my $tag_name_end; |
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if ($tag_name_start =~ /^(.+)\.\.(.+)$/) { |
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$tag_name_start = $1; |
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$tag_name_end = $2; |
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} else { |
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$tag_name_end = $tag_name_start; |
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} |
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for my $tag_name ($tag_name_start .. $tag_name_end) { |
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if ($subtags->{$subtag->{Type}->[0]}->{$tag_name}) { |
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warn "Duplicate tag: $tag_name\n"; |
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} else { |
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$subtags->{$subtag->{Type}->[0]}->{$tag_name} = $subtag; |
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} |
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} |
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} else { ## The first record |
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$subtags->{header} = $subtag; |
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} |
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} |
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} |
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## Remove unused data |
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$subtags->{_file_date} = $subtags->{header}->{'File-Date'}->[0]; |
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delete $subtags->{header}; |
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for my $type (grep {!/^_/} keys %{$subtags}) { |
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for my $tag (keys %{$subtags->{$type}}) { |
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my $subtag = $subtags->{$type}->{$tag}; |
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delete $subtag->{Comments}; |
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delete $subtag->{Description}; |
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delete $subtag->{Added}; |
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delete $subtag->{Tag}; |
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delete $subtag->{Subtag}; |
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delete $subtag->{Type}; |
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$subtag->{_deprecated} = 1 if $subtag->{Deprecated}; |
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delete $subtag->{Deprecated}; |
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$subtag->{_preferred} = $subtag->{'Preferred-Value'}->[0] |
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if defined $subtag->{'Preferred-Value'}->[0]; |
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delete $subtag->{'Preferred-Value'}; |
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if (defined $subtag->{'Suppress-Script'}->[0]) { |
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$subtag->{_suppress} = $subtag->{'Suppress-Script'}->[0]; |
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$subtag->{_suppress} =~ tr/A-Z/a-z/; |
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} |
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delete $subtag->{'Suppress-Script'}; |
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for (@{$subtag->{Prefix} or []}) { |
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tr/A-Z/a-z/; |
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} |
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} |
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} |
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## Resolve transitive relationship of Preferred-Value field |
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## NOTE: Although noted in RFC 4646, urrently no tag has such relationship. |
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for my $type (grep {!/^_/} keys %{$subtags}) { |
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for my $tag (keys %{$subtags->{$type}}) { |
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my $subtag = $subtags->{$type}->{$tag}; |
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my $new_subtag = $subtag; |
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while (1) { |
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my $preferred = $new_subtag->{_preferred}; |
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last unless defined $preferred; |
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$preferred =~ tr/A-Z/a-z/; |
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$new_subtag = $subtags->{$type}->{$preferred}; |
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last unless $new_subtag; |
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} |
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} |
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} |
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use Data::Dumper; |
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$Data::Dumper::Sortkeys = 1; |
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wakaba |
1.2 |
$Data::Dumper::Purity = 1; |
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wakaba |
1.1 |
my $value = Dumper $subtags; |
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$value =~ s/\$VAR1\b/\$Whatpm::LangTag::Registry/g; |
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print $value; |
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print "1;\n"; |
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print '__DATA__ |
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=head1 NAME |
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mklangreg.pl - Generate language subtag registry object for langauge |
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tag validation |
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_LangTagReg.pm - A language subtag registry data module for language |
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tag validation |
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=head1 DESCRIPTION |
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The C<_LangTagReg.pm> file contains a list of registered language |
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subtags. It is used by L<Whatpm::LangTag> for the purpose of language |
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tag validation. |
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The C<mklangreg.pl> script is used to generate the C<_LangTagReg.pm> |
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file from the IANA registry. |
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=head1 SEE ALSO |
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L<Whatpm::LangTag>. |
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RFC 4646 (BCP 47) Tags for Identifying Languages <urn:ietf:rfc:4646>. |
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IANA Language Subtag Registry |
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<http://www.iana.org/assignments/language-subtag-registry>. |
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=head1 LICENSE |
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The C<mklangreg.pl> is in the Public Domain. |
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=cut |
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'; |
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