source: trunk/essentials/dev-lang/perl/ext/Encode/bin/ucm2table

#!/usr/bin/perl
# $Id: ucm2table,v 2.0 2004/05/16 20:55:16 dankogai Exp $
#

use 5.006;
use strict;
use Getopt::Std;
my %Opt;
getopts("aeu", \%Opt);
my %Chartab;

my $Hex = '[0-9A-Fa-f]';
while(<>){
        chomp;
        my ($uni, $enc, $fb) = 
            /^<U($Hex+)>\s+(\S+)\s+\|(\d)/o or next;
        $fb eq '0' or next;
        my @byte = ();
        my $ord = 0;
        while($enc =~ /\G\\x($Hex+)/iog){
            my $byte = hex($1);
            push @byte, $byte;
            $ord <<= 8; $ord += $byte;
        };
        # print join('', @byte), " => $ord \n";
        if ($Opt{u}){
            $Chartab{$ord} = pack("U", hex($uni));
        }else{
            $Chartab{$ord} = pack("C*", @byte);
        }
}

my $start = $Opt{a} ? 0x20 : 0xa0;

for (my $x = $start; $x <= 0xffff; $x += 32) {
    my $line =  '';
    for my $i (0..31){
        my $num = $x+$i; $num eq 0x7f and next; # skip delete
        my $char = $Chartab{$num};
        $line .= !$char ? " " : 
            ($num < 0x7f ) ? " $char" : $char ;
    }
    $line =~ /^\s+$/o and next;
    printf "0x%04x: $line\n", $x;
}