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#!/usr/bin/perl
# parse-mozilla-encoding-table.pl, version 0.6
#
# Script to deassemble existing Mozilla *.uf or *.ut files
# back to source conversion tables.
# by Anthony Fok <anthony@thizlinux.com>, ThizLinux Laboratory Ltd., 2002/11/27
# License: GNU General Public License, version 2 or newer
#
# Used for verifying HKSCS-1999 hkscs.uf and hkscs.ut so that I can make
# new ones for HKSCS-2001. This script is quick-and-dirty and not very
# robust, so if the debug output of fromu/tou ever changes, this script
# will need to be modified too. :-)
my %data = ();
my $mappingPos = 0;
my $filename = shift;
my $mode;
if ($filename =~ /\.(ut|uf)$/) {
print $filename, "\n";
$mode = $1;
} else {
die;
}
open(INFILE, "<$filename") or die;
# Quick-and-dirty routine to populate %data
while (<INFILE>) {
if (/^Begin of Item ([[:xdigit:]]+)/) {
die if defined($itemId) and hex($itemId) + 1 != hex($1);
$itemId = $1;
<INFILE> =~ /Format ([012])/ or die;
$format = $1;
<INFILE> =~ /srcBegin = ([[:xdigit:]]+)/ or die;
$srcBegin = $1;
if ($format == 0) { # Range
<INFILE> =~ /srcEnd = ([[:xdigit:]]+)/ or die;
$srcEnd = $1;
<INFILE> =~ /destBegin = ([[:xdigit:]]+)/ or die;
$destBegin = $1;
for ($i = hex($srcBegin); $i <= hex($srcEnd); $i++) {
$data{sprintf("%04X",$i)} = sprintf("%04X",
hex($destBegin) + $i - hex($srcBegin));
}
<INFILE> =~ /^End of Item $itemId\s*$/ or die;
}
elsif ($format == 1) { # Mapping
<INFILE> =~ /srcEnd = ([[:xdigit:]]+)/ or die;
$srcEnd = $1;
<INFILE> =~ /mappingOffset = ([[:xdigit:]]+)/ or die;
$mappingOffset = hex($1);
die unless $mappingOffset == $mappingPos;
<INFILE> =~ /Mapping =\s*$/ or die;
until ($_ = <INFILE>, /^End of Item/) {
chop;
for $i (split ' ') {
$key = sprintf("%04X", hex($srcBegin) - $mappingOffset + $mappingPos++);
next if $i eq "FFFD";
if (defined($data{$key})) {
print "Error: doubly defined. $key was $data{$key}, and now $i.\n";
} else {
$data{$key} = $i;
}
}
}
die unless $mappingPos - $mappingOffset == hex($srcEnd) - hex($srcBegin) + 1;
/^End of Item $itemId\s*$/ or die;
}
else { # Single ($format == 2)
<INFILE> =~ /destBegin = ([[:xdigit:]]+)/ or die;
$destBegin = $1;
$data{$srcBegin} = $destBegin;
<INFILE> =~ /^End of Item $itemId\s*$/ or die;
}
}
}
# Generate conversion table
for $key (sort keys %data) {
if ($mode eq "ut") {
print "0x$key\t0x$data{$key}\n";
} elsif ($mode eq "uf") {
print "0x$data{$key}\t0x$key\n";
} else {
die;
}
}
close INFILE;
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