-#!/usr/bin/env perl
-
-use strict;
-use warnings;
-use utf8;
-
-use open OUT => ':utf8', ':std';
-use Data::Dumper;
-
-our $VERSION = '1.02';
-
-# expect input data source at command line
-@ARGV or die "Specify input source file or - for STDIN\n";
-
-# skip everything until a character indented by 1 space (table start)
-do {
- $_ = readline;
- defined or die "Premature input end";
-} until /^\s\S/;
-
-my @t = $_; # add first line (already read, assume it's ok)
-
-# read the rest of the character table
-while ($_ = readline) {
- # check for table end (chapter 4)
- last if /^\d/;
-
- # parse table lines (ignore (unindented) page break)
- next unless s/^ //;
- chomp;
-
- # add the line to @t
- if (s/^ {15}/ /) {
- # continuation line (add to last entry)
- $t[-1] .= $_;
- }
- else {
- # add a new entry
- push @t, $_;
- }
-}
-
-# create a hash of desired input
-my %di;
-for (@t) {
- my ($mnem, $char, $name) = split / +/, $_, 3;
- next if length $mnem != 2;
- $di{$mnem} = hex $char;
-}
-
-# XXX
-my %trans = (
- 0xE001 => 0, # join lines: not accepted
- 0xE004 => 0, # umlaut is no different from diaeresis 0x0308
- 0xE005 => 0x0344, # discouraged
- 0xE006 => 0x0300,
- 0xE007 => 0x0301,
- 0xE008 => 0x0302,
- 0xE009 => 0x0303,
- 0xE00A => 0x0304,
- 0xE00B => 0x0306,
- 0xE00C => 0x0307,
- 0xE00D => 0x0308,
- 0xE00E => 0x030A,
- 0xE00F => 0x030B,
- 0xE010 => 0x030C,
- 0xE011 => 0x0327,
- 0xE012 => 0x0328,
- 0xE013 => 0x0332,
- 0xE014 => 0x0333,
- 0xE015 => 0x0338,
- 0xE016 => 0x0345,
- 0xE017 => 0x0314,
- 0xE018 => 0x0313,
- 0xE019 => 0x1FFE,
- 0xE01A => 0x1FBF,
- 0xE01B => 0x03D0, # middle beta = curled beta?
- 0xE01C => 0x25CB,
- 0xE01D => 0x0192,
- 0xE01E => 0x0292,
- 0xE01F => 0x33C2, # am, compatibility char
- 0xE020 => 0x33D8, # pm, compatibility char
- 0xE021 => 0x2121,
- 0xE022 => 0xFE8E,
- 0xE023 => 0, # dutch guilder 0192 is already encoded, and not very useful anyway
- 0xE024 => 0x0393,
- 0xE025 => 0x20D7, # also 20D1; non-spacing
- 0xE026 => 0x1FEF,
- 0xE027 => 0x1FC0,
- 0xE028 => 0x01F0, #but uppercase
-);
-for (values %di) {
- $_ >= 0xE000 or next;
- $_ = $trans{$_} if defined $trans{$_};
-}
-
-# personal addendums
-my @extra;
-if (-r 'shiar.inc.txt') {
- open my $include, '<:utf8', 'shiar.inc.txt';
- for (readline $include) {
- m{^(\$?[!"%'-Z_a-z]{2}) (.)} or next;
- warn("$1 already defined"), next if defined $di{$1};
- $di{$1} = ord $2;
- push @extra, $1;
- }
-}
-warn $@ if $@;
-
-$di{chr $_} = $_ for 32 .. 126;
-$di{'\\'.$_} = delete $di{$_} for '{', '}', '\\';
-
-# optionally get unicode character information
-my %info = eval {
- require Unicode::UCD;
- map {
- $_ => Unicode::UCD::charinfo($di{$_})
- || { block => '?', category => 'Xn', name => '', script => '' }
- } keys %di;
-};
-
-# add custom categories for certain blocks
-for (values %info) {
- $_->{category} .= ' Xa' if $_->{block} eq 'Basic Latin';
- $_->{category} .= ' Xl' if $_->{block} eq 'Latin-1 Supplement';
-}
-
-# mark unofficial extras as such
-$info{$_}->{category} .= ' Xz' for @extra;
-
-for (keys %di) {
- $info{$_}->{string} = chr(9676) . chr($di{$_}) if $info{$_}->{combining};
- # find control characters (first 32 chars from 0 and 128)
- next unless ($di{$_} & ~0b1001_1111) == 0 or $di{$_} == 127;
- # rename to something more descriptive
- $info{$_}->{name} = $info{$_}->{unicode10}
- ? '<'.$info{$_}->{unicode10}.'>' # the old name was much more useful
- : sprintf('<control U+%04X>', $di{$_}); # at least identify by value
- # show descriptive symbols instead of control chars themselves
- $info{$_}->{string} = $di{$_} < 32 ? chr($di{$_} + 0x2400) : chr(0xFFFD);
-}
-# presentational string for some control(lish) entries
-$info{$_}->{string} = '-' for grep { $di{$_} == 0x00AD } keys %di;
-$info{$_}->{string} = '→' for grep { $di{$_} == 0x200E } keys %di;
-$info{$_}->{string} = '←' for grep { $di{$_} == 0x200F } keys %di;
-
-# convert info hashes into arrays of strings to output in display order
-for my $row (values %info) {
- $row = [ map { $row->{$_} } qw/name category script string/ ];
- # strip off trailing missing values (especially string may be unknown)
- defined $row->[-1] ? last : pop @$row for 1 .. @$row;
-}
-
-# output perl code of hash
-# (assume no backslashes or curlies, so we can just q{} w/o escaping)
-print "+{\n";
-printf '(map {$_=>0} qw{%s}),'."\n", join(' ',
- map { substr($_, 1, 1).substr($_, 0, 1) } sort keys %di
-);
-printf "q{%s}=>[%s],\n", $_, join(',',
- $di{$_}, # original code point
- $info{$_} # optional additional arguments
- ? map {"'$_'"} @{ $info{$_} }
- : ()
-) for sort keys %di;
-print "}\n";
-
-__END__
-
-=head1 NAME
-
-rfc1345convert - Output digraph data from RFC-1345
-
-=head1 SYNOPSIS
-
-Extract digraphs from text specifications as a perl hash:
-
- rfc1345convert rfc1345.txt custom.txt > digraphs.inc.pl
-
-Input can be the literal RFC (or similar) document:
-
- curl http://www.ietf.org/rfc/rfc1345.txt | rfc1345convert -
-
-Test by printing the character for DO (should be a dollar sign):
-
- perl -e'$di = do "digraphs.inc.pl"; print chr $di->{DO}->[0]'
-
-=head1 DESCRIPTION
-
-Parses the official RFC-1345 document, searching the
-'character mnemonic table' for all digraph definitions.
-If successful, Perl code is output resulting in a hash
-with character data keyed by digraph.
-Any errors and warnings are given at STDERR.
-
-The value can either be a scalar string containing another
-digraph which can be considered identical (usually inverted),
-or an array ref containing at least the resulting character's
-Unicode code point value. If available, the following UCD data
-is appended: character name, category, script, and output string.
-For example:
-
- +{
- AE => [198, 'LATIN CAPITAL LETTER AE', 'Lu Xl', 'Latin'],
- EA => 'AE',
- }
-
-=head1 AUTHOR
-
-Mischa POSLAWSKY <perl@shiar.org>
-
-=head1 LICENSE
-
-Licensed under the GNU Affero General Public License version 3.
-
git.shiar.nl / sheet.git / blobdiff