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# encodings.pl - Download IANA text and compute alias list.
# Assumes you are running this program from gnu/gcj/convert/.
# Output suitable for direct inclusion in IOConverter.java.
# Map IANA canonical names onto our canonical names.
%map = (
'ANSI_X3.4-1968' => 'ASCII',
'ISO_8859-1:1987' => '8859_1',
'UTF-8' => 'UTF8',
'Shift_JIS' => 'SJIS',
'Extended_UNIX_Code_Packed_Format_for_Japanese' => 'EUCJIS',
'UTF16-LE' => 'UnicodeLittle',
'UTF16-BE' => 'UnicodeBig'
);
if ($ARGV[0] eq '')
{
$file = 'character-sets';
if (! -f $file)
{
# Too painful to figure out how to get Perl to do it.
system 'wget -o .wget-log http://www.iana.org/assignments/character-sets';
}
}
else
{
$file = $ARGV[0];
}
# Include canonical names in the output.
foreach $key (keys %map)
{
$output{lc ($key)} = $map{$key};
}
open (INPUT, "< $file") || die "couldn't open $file: $!";
$body = 0;
$current = '';
while (<INPUT>)
{
chop;
$body = 1 if /^Name:/;
next unless $body;
if (/^$/)
{
$current = '';
next;
}
($type, $name) = split (/\s+/);
# Encoding names are case-insensitive. We do all processing on
# the lower-case form.
my $lower = lc ($name);
if ($type eq 'Name:')
{
$current = $map{$name};
if ($current)
{
$output{$lower} = $current;
}
}
elsif ($type eq 'Alias:')
{
# The IANA list has some ugliness.
if ($name ne '' && $lower ne 'none' && $current)
{
$output{$lower} = $current;
}
}
}
close (INPUT);
foreach $key (sort keys %output)
{
print " hash.put (\"$key\", \"$output{$key}\");\n";
}
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