#!/usr/bin/perl -w
my $cdroot = shift || "CD";
die "Need Unicode-CD location as argument\n" unless -d "$cdroot/mappings";
# The content of the Unicode-CD is also available from
#          ftp://ftp.unicode.org/Public
unless (-d "maps") {
    print STDERR "Making directory 'maps'\n";
    mkdir('maps', 0777) || die "Can't create directory: $!";
}
if (open(ALIASES, "maps/aliases")) {
    while (<ALIASES>) {
        next if /^\s*\#/;
        next if /^\s*$/;
        chomp;
        my($charset, @aliases) = split(' ', $_);
        $aliases{$charset} = { map {$_ => 1} @aliases };
    }
}
# Adobe encodings
for $enc ("stdenc", "symbol", "zdingbat") {
    my $file = "$cdroot/mappings/vendors/adobe/$enc.txt";
    if (open(F, $file) ||
        (-f "$file.gz" && open(F, "gunzip -c $file.gz|"))
       ) {
        $name = $enc;
        @map = ();
        while (<F>) {
            if (/^\#\s*Name:\s*(.*)/) {
                $name = $1;
            } elsif (/^([0-9A-Fa-f]{4})\s+([0-9A-Fa-f]{2})/) {
                push(@map, [$2, $1]);
            }
        }
        close(F);
        next unless @map;
        $name =~ s/ Encoding to Unicode$//;
        $name =~ s/\s+/-/g;
         
        my $lc = lc($name);
        $aliases{$name}{$lc}++ if $lc ne $name;
        print STDERR "$name\n";
        open(BINMAP, "| ./map8_txt2bin >maps/$name.bin") || die;
        for (sort {$a->[0] cmp $b->[0]} @map) {
            printf BINMAP "0x%s 0x%s\n", @$_;
        }
        close(BINMAP);
    }
}
# Microsoft stuff
use File::Find;
find(sub {
         return unless /\.txt(\.gz)?$/;
         push(@enc, $File::Find::name);
     },
     "$cdroot/mappings/vendors/micsft");
for $enc (@enc) {
    @map = ();
    $cp = undef;
    $name = undef;
    $fname = $enc;
    $fname =~ s/\.gz$//;
    $fname =~ s/\.txt$//;
    $fname =~ s,.*/,,;
    $enc = "gunzip -c $enc|" if $enc =~ /\.gz$/;
    #print "$fname\n";
    open(F, $enc) || next;
    while (<F>) {
        if (/^\#\s*Name:\s*(.*)/) {
            $name = $1;
            $name =~ s/ to Unicode table$//;
            $name =~ s/\s*\(.*\)\s*//;
            $cp = $1 if $name =~ s/(^cp\d+)_//;
        } elsif (/^0x([0-9A-Fa-f]+)\s+0x([0-9A-Fa-f]+)/ && $name) {
            my $u8 = hex($1);
            if ($u8 > 0xFF) {
                printf STDERR "Skipping $fname ($name), not 8-bit charset\n";
                undef($name);
                last;
            }
            my $u16 = hex($2);
            push(@map, [$u8, $u16]);
        }
    }
    close(F);
    next unless $name;
    my $file = $cp || $name;
    $aliases{$file}{$name}++ if $name ne $file;
    print STDERR "$file\n";
    open(BINMAP, "| ./map8_txt2bin >maps/$file.bin") || die;
    for (@map) {
        printf BINMAP "0x%02X 0x%04X\n", @$_;
    }
    close(BINMAP);
}
open(ALIASES, ">maps/aliases") || die "Can't write aliases: $!";
for (sort keys %aliases) {
    print ALIASES "$_ ", join(" ", sort keys %{$aliases{$_}}), "\n";
}
close(ALIASES);