#!/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);