our $VERSION = '1.01';
+my $locale_encoding;
+
+sub in_locale { $^H & $locale::hint_bits }
+
+sub _get_locale_encoding {
+ unless (defined $locale_encoding) {
+ eval {
+ # I18N::Langinfo isn't available everywhere
+ require I18N::Langinfo;
+ I18N::Langinfo->import('langinfo', 'CODESET');
+ };
+ unless ($@) {
+ $locale_encoding = langinfo(CODESET());
+ }
+ my $country_language;
+ if (not $locale_encoding && in_locale()) {
+ if ($ENV{LC_ALL} =~ /^([^.]+)\.([^.]+)$/) {
+ ($country_language, $locale_encoding) = ($1, $2);
+ } elsif ($ENV{LANG} =~ /^([^.]+)\.([^.]+)$/) {
+ ($country_language, $locale_encoding) = ($1, $2);
+ }
+ } else {
+ # Could do heuristics based on the country and language
+ # parts of LC_ALL and LANG (the parts before the dot (if any)),
+ # since we have Locale::Country and Locale::Language available.
+ # TODO: get a database of Language -> Encoding mappings
+ # (the Estonian database at http://www.eki.ee/letter/
+ # would be excellent!) --jhi
+ }
+ if (defined $locale_encoding &&
+ $locale_encoding eq 'euc' &&
+ defined $country_language) {
+ if ($country_language =~ /^ja_JP|japan(?:ese)?$/i) {
+ $locale_encoding = 'eucjp';
+ } elsif ($country_language =~ /^ko_KR|korean?$/i) {
+ $locale_encoding = 'euckr';
+ } elsif ($country_language =~ /^zh_TW|taiwan(?:ese)?$/i) {
+ $locale_encoding = 'euctw';
+ }
+ croak "Locale encoding 'euc' too ambiguous"
+ if $locale_encoding eq 'euc';
+ }
+ }
+}
+
sub import {
my ($class,@args) = @_;
croak("`use open' needs explicit list of disciplines") unless @args;
$^H |= $open::hint_bits;
- my ($in,$out) = split(/\0/,(${^OPEN} || '\0'));
- my @in = split(/\s+/,$in);
- my @out = split(/\s+/,$out);
+ my ($in,$out) = split(/\0/,(${^OPEN} || "\0"), -1);
while (@args) {
my $type = shift(@args);
my $discp = shift(@args);
my @val;
foreach my $layer (split(/\s+/,$discp)) {
$layer =~ s/^://;
- unless(PerlIO::Layer::->find($layer)) {
- carp("Unknown discipline layer '$layer'");
+ if ($layer eq 'locale') {
+ use Encode;
+ _get_locale_encoding()
+ unless defined $locale_encoding;
+ croak "Cannot figure out an encoding to use"
+ unless defined $locale_encoding;
+ if ($locale_encoding =~ /^utf-?8$/i) {
+ $layer = "utf8";
+ } else {
+ $layer = "encoding($locale_encoding)";
+ }
+ } else {
+ unless(PerlIO::Layer::->find($layer)) {
+ carp("Unknown discipline layer '$layer'");
+ }
}
push(@val,":$layer");
if ($layer =~ /^(crlf|raw)$/) {
$^H{"open_$type"} = $layer;
}
}
+ # print "# type = $type, val = @val\n";
if ($type eq 'IN') {
$in = join(' ',@val);
}
elsif ($type eq 'OUT') {
$out = join(' ',@val);
}
+ elsif ($type eq 'INOUT') {
+ $in = $out = join(' ',@val);
+ }
else {
croak "Unknown discipline class '$type'";
}
=head1 SYNOPSIS
use open IN => ":crlf", OUT => ":raw";
+ use open INOUT => ":utf8";
=head1 DESCRIPTION
=head1 IMPLEMENTATION DETAILS
-There is a class method in C<PerlIO::Layer> C<find> which is implemented as XS code.
-It is called by C<import> to validate the layers:
+There is a class method in C<PerlIO::Layer> C<find> which is
+implemented as XS code. It is called by C<import> to validate the
+layers:
PerlIO::Layer::->find("perlio")
-The return value (if defined) is a Perl object, of class C<PerlIO::Layer> which is
-created by the C code in F<perlio.c>. As yet there is nothing useful you can do with the
-object at the perl level.
+The return value (if defined) is a Perl object, of class
+C<PerlIO::Layer> which is created by the C code in F<perlio.c>. As
+yet there is nothing useful you can do with the object at the perl
+level.
=head1 SEE ALSO