long.pm

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	foreach ( split(/\n+/, $dups) ) {
	    warn($_."\n");
	}
    }
    ($names[0], $orig);
}

# Option lookup.
sub FindOption ($$$$$) {

    # returns (1, $opt, $ctl, $arg, $key) if okay,
    # returns (1, undef) if option in error,
    # returns (0) otherwise.

    my ($argv, $prefix, $argend, $opt, $opctl) = @_;

    print STDERR ("=> find \"$opt\"\n") if $debug;

    return (0) unless $opt =~ /^$prefix(.*)$/s;
    return (0) if $opt eq "-" && !defined $opctl->{''};

    $opt = $+;
    my $starter = $1;

    print STDERR ("=> split \"$starter\"+\"$opt\"\n") if $debug;

    my $optarg;			# value supplied with --opt=value
    my $rest;			# remainder from unbundling

    # If it is a long option, it may include the value.
    # With getopt_compat, only if not bundling.
    if ( ($starter=~/^$longprefix$/
          || ($getopt_compat && ($bundling == 0 || $bundling == 2)))
	  && $opt =~ /^([^=]+)=(.*)$/s ) {
	$opt = $1;
	$optarg = $2;
	print STDERR ("=> option \"", $opt,
		      "\", optarg = \"$optarg\"\n") if $debug;
    }

    #### Look it up ###

    my $tryopt = $opt;		# option to try

    if ( $bundling && $starter eq '-' ) {

	# To try overrides, obey case ignore.
	$tryopt = $ignorecase ? lc($opt) : $opt;

	# If bundling == 2, long options can override bundles.
	if ( $bundling == 2 && length($tryopt) > 1
	     && defined ($opctl->{$tryopt}) ) {
	    print STDERR ("=> $starter$tryopt overrides unbundling\n")
	      if $debug;
	}
	else {
	    $tryopt = $opt;
	    # Unbundle single letter option.
	    $rest = length ($tryopt) > 0 ? substr ($tryopt, 1) : '';
	    $tryopt = substr ($tryopt, 0, 1);
	    $tryopt = lc ($tryopt) if $ignorecase > 1;
	    print STDERR ("=> $starter$tryopt unbundled from ",
			  "$starter$tryopt$rest\n") if $debug;
	    $rest = undef unless $rest ne '';
	}
    }

    # Try auto-abbreviation.
    elsif ( $autoabbrev ) {
	# Sort the possible long option names.
	my @names = sort(keys (%$opctl));
	# Downcase if allowed.
	$opt = lc ($opt) if $ignorecase;
	$tryopt = $opt;
	# Turn option name into pattern.
	my $pat = quotemeta ($opt);
	# Look up in option names.
	my @hits = grep (/^$pat/, @names);
	print STDERR ("=> ", scalar(@hits), " hits (@hits) with \"$pat\" ",
		      "out of ", scalar(@names), "\n") if $debug;

	# Check for ambiguous results.
	unless ( (@hits <= 1) || (grep ($_ eq $opt, @hits) == 1) ) {
	    # See if all matches are for the same option.
	    my %hit;
	    foreach ( @hits ) {
		my $hit = $_;
		$hit = $opctl->{$hit}->[CTL_CNAME]
		  if defined $opctl->{$hit}->[CTL_CNAME];
		$hit{$hit} = 1;
	    }
	    # Remove auto-supplied options (version, help).
	    if ( keys(%hit) == 2 ) {
		if ( $auto_version && exists($hit{version}) ) {
		    delete $hit{version};
		}
		elsif ( $auto_help && exists($hit{help}) ) {
		    delete $hit{help};
		}
	    }
	    # Now see if it really is ambiguous.
	    unless ( keys(%hit) == 1 ) {
		return (0) if $passthrough;
		warn ("Option ", $opt, " is ambiguous (",
		      join(", ", @hits), ")\n");
		$error++;
		return (1, undef);
	    }
	    @hits = keys(%hit);
	}

	# Complete the option name, if appropriate.
	if ( @hits == 1 && $hits[0] ne $opt ) {
	    $tryopt = $hits[0];
	    $tryopt = lc ($tryopt) if $ignorecase;
	    print STDERR ("=> option \"$opt\" -> \"$tryopt\"\n")
		if $debug;
	}
    }

    # Map to all lowercase if ignoring case.
    elsif ( $ignorecase ) {
	$tryopt = lc ($opt);
    }

    # Check validity by fetching the info.
    my $ctl = $opctl->{$tryopt};
    unless  ( defined $ctl ) {
	return (0) if $passthrough;
	# Pretend one char when bundling.
	if ( $bundling == 1 && length($starter) == 1 ) {
	    $opt = substr($opt,0,1);
            unshift (@$argv, $starter.$rest) if defined $rest;
	}
	warn ("Unknown option: ", $opt, "\n");
	$error++;
	return (1, undef);
    }
    # Apparently valid.
    $opt = $tryopt;
    print STDERR ("=> found ", OptCtl($ctl),
		  " for \"", $opt, "\"\n") if $debug;

    #### Determine argument status ####

    # If it is an option w/o argument, we're almost finished with it.
    my $type = $ctl->[CTL_TYPE];
    my $arg;

    if ( $type eq '' || $type eq '!' || $type eq '+' ) {
	if ( defined $optarg ) {
	    return (0) if $passthrough;
	    warn ("Option ", $opt, " does not take an argument\n");
	    $error++;
	    undef $opt;
	}
	elsif ( $type eq '' || $type eq '+' ) {
	    # Supply explicit value.
	    $arg = 1;
	}
	else {
	    $opt =~ s/^no-?//i;	# strip NO prefix
	    $arg = 0;		# supply explicit value
	}
	unshift (@$argv, $starter.$rest) if defined $rest;
	return (1, $opt, $ctl, $arg);
    }

    # Get mandatory status and type info.
    my $mand = $ctl->[CTL_AMIN];

    # Check if there is an option argument available.
    if ( $gnu_compat && defined $optarg && $optarg eq '' ) {
	return (1, $opt, $ctl, $type eq 's' ? '' : 0) ;#unless $mand;
	$optarg = 0 unless $type eq 's';
    }

    # Check if there is an option argument available.
    if ( defined $optarg
	 ? ($optarg eq '')
	 : !(defined $rest || @$argv > 0) ) {
	# Complain if this option needs an argument.
#	if ( $mand && !($type eq 's' ? defined($optarg) : 0) ) {
	if ( $mand ) {
	    return (0) if $passthrough;
	    warn ("Option ", $opt, " requires an argument\n");
	    $error++;
	    return (1, undef);
	}
	if ( $type eq 'I' ) {
	    # Fake incremental type.
	    my @c = @$ctl;
	    $c[CTL_TYPE] = '+';
	    return (1, $opt, \@c, 1);
	}
	return (1, $opt, $ctl,
		defined($ctl->[CTL_DEFAULT]) ? $ctl->[CTL_DEFAULT] :
		$type eq 's' ? '' : 0);
    }

    # Get (possibly optional) argument.
    $arg = (defined $rest ? $rest
	    : (defined $optarg ? $optarg : shift (@$argv)));

    # Get key if this is a "name=value" pair for a hash option.
    my $key;
    if ($ctl->[CTL_DEST] == CTL_DEST_HASH && defined $arg) {
	($key, $arg) = ($arg =~ /^([^=]*)=(.*)$/s) ? ($1, $2)
	  : ($arg, defined($ctl->[CTL_DEFAULT]) ? $ctl->[CTL_DEFAULT] :
	     ($mand ? undef : ($type eq 's' ? "" : 1)));
	if (! defined $arg) {
	    warn ("Option $opt, key \"$key\", requires a value\n");
	    $error++;
	    # Push back.
	    unshift (@$argv, $starter.$rest) if defined $rest;
	    return (1, undef);
	}
    }

    #### Check if the argument is valid for this option ####

    my $key_valid = $ctl->[CTL_DEST] == CTL_DEST_HASH ? "[^=]+=" : "";

    if ( $type eq 's' ) {	# string
	# A mandatory string takes anything.
	return (1, $opt, $ctl, $arg, $key) if $mand;

	# Same for optional string as a hash value
	return (1, $opt, $ctl, $arg, $key)
	  if $ctl->[CTL_DEST] == CTL_DEST_HASH;

	# An optional string takes almost anything.
	return (1, $opt, $ctl, $arg, $key)
	  if defined $optarg || defined $rest;
	return (1, $opt, $ctl, $arg, $key) if $arg eq "-"; # ??

	# Check for option or option list terminator.
	if ($arg eq $argend ||
	    $arg =~ /^$prefix.+/) {
	    # Push back.
	    unshift (@$argv, $arg);
	    # Supply empty value.
	    $arg = '';
	}
    }

    elsif ( $type eq 'i'	# numeric/integer
            || $type eq 'I'	# numeric/integer w/ incr default
	    || $type eq 'o' ) { # dec/oct/hex/bin value

	my $o_valid = $type eq 'o' ? PAT_XINT : PAT_INT;

	if ( $bundling && defined $rest
	     && $rest =~ /^($key_valid)($o_valid)(.*)$/si ) {
	    ($key, $arg, $rest) = ($1, $2, $+);
	    chop($key) if $key;
	    $arg = ($type eq 'o' && $arg =~ /^0/) ? oct($arg) : 0+$arg;
	    unshift (@$argv, $starter.$rest) if defined $rest && $rest ne '';
	}
	elsif ( $arg =~ /^$o_valid$/si ) {
	    $arg =~ tr/_//d;
	    $arg = ($type eq 'o' && $arg =~ /^0/) ? oct($arg) : 0+$arg;
	}
	else {
	    if ( defined $optarg || $mand ) {
		if ( $passthrough ) {
		    unshift (@$argv, defined $rest ? $starter.$rest : $arg)
		      unless defined $optarg;
		    return (0);
		}
		warn ("Value \"", $arg, "\" invalid for option ",
		      $opt, " (",
		      $type eq 'o' ? "extended " : '',
		      "number expected)\n");
		$error++;
		# Push back.
		unshift (@$argv, $starter.$rest) if defined $rest;
		return (1, undef);
	    }
	    else {
		# Push back.
		unshift (@$argv, defined $rest ? $starter.$rest : $arg);
		if ( $type eq 'I' ) {
		    # Fake incremental type.
		    my @c = @$ctl;
		    $c[CTL_TYPE] = '+';
		    return (1, $opt, \@c, 1);
		}
		# Supply default value.
		$arg = defined($ctl->[CTL_DEFAULT]) ? $ctl->[CTL_DEFAULT] : 0;
	    }
	}
    }

    elsif ( $type eq 'f' ) { # real number, int is also ok
	# We require at least one digit before a point or 'e',
	# and at least one digit following the point and 'e'.
	# [-]NN[.NN][eNN]
	my $o_valid = PAT_FLOAT;
	if ( $bundling && defined $rest &&
	     $rest =~ /^($key_valid)($o_valid)(.*)$/s ) {
	    $arg =~ tr/_//d;
	    ($key, $arg, $rest) = ($1, $2, $+);
	    chop($key) if $key;
	    unshift (@$argv, $starter.$rest) if defined $rest && $rest ne '';
	}
	elsif ( $arg =~ /^$o_valid$/ ) {
	    $arg =~ tr/_//d;
	}
	else {
	    if ( defined $optarg || $mand ) {
		if ( $passthrough ) {
		    unshift (@$argv, defined $rest ? $starter.$rest : $arg)
		      unless defined $optarg;
		    return (0);
		}
		warn ("Value \"", $arg, "\" invalid for option ",
		      $opt, " (real number expected)\n");
		$error++;
		# Push back.
		unshift (@$argv, $starter.$rest) if defined $rest;
		return (1, undef);
	    }
	    else {
		# Push back.
		unshift (@$argv, defined $rest ? $starter.$rest : $arg);
		# Supply default value.
		$arg = 0.0;
	    }
	}
    }
    else {
	die("Getopt::Long internal error (Can't happen)\n");
    }
    return (1, $opt, $ctl, $arg, $key);
}

sub ValidValue ($$$$$) {
    my ($ctl, $arg, $mand, $argend, $prefix) = @_;

    if ( $ctl->[CTL_DEST] == CTL_DEST_HASH ) {
	return 0 unless $arg =~ /[^=]+=(.*)/;
	$arg = $1;
    }

    my $type = $ctl->[CTL_TYPE];

    if ( $type eq 's' ) {	# string
	# A mandatory string takes anything.
	return (1) if $mand;

	return (1) if $arg eq "-";

	# Check for option or option list terminator.
	return 0 if $arg eq $argend || $arg =~ /^$prefix.+/;
	return 1;
    }

    elsif ( $type eq 'i'	# numeric/integer
            || $type eq 'I'	# numeric/integer w/ incr default
	    || $type eq 'o' ) { # dec/oct/hex/bin value

	my $o_valid = $type eq 'o' ? PAT_XINT : PAT_INT;
	return $arg =~ /^$o_valid$/si;
    }

    elsif ( $type eq 'f' ) { # real number, int is also ok
	# We require at least one digit before a point or 'e',
	# and at least one digit following the point and 'e'.
	# [-]NN[.NN][eNN]
	my $o_valid = PAT_FLOAT;
	return $arg =~ /^$o_valid$/;
    }
    die("ValidValue: Cannot happen\n");
}

# Getopt::Long Configuration.
sub Configure (@) {
    my (@options) = @_;

    my $prevconfig =
      [ $error, $debug, $major_version, $minor_version,
	$autoabbrev, $getopt_compat, $ignorecase, $bundling, $order,
	$gnu_compat, $passthrough, $genprefix, $auto_version, $auto_help,
	$longprefix ];

    if ( ref($options[0]) eq 'ARRAY' ) {
	( $error, $debug, $major_version, $minor_version,
	  $autoabbrev, $getopt_compat, $ignorecase, $bundling, $order,
	  $gnu_compat, $passthrough, $genprefix, $auto_version, $auto_help,
	  $longprefix ) = @{shift(@options)};
    }

    my $opt;
    foreach $opt ( @options ) {
	my $try = lc ($opt);
	my $action = 1;
	if ( $try =~ /^no_?(.*)$/s ) {
	    $action = 0;
	    $try = $+;
	}
	if ( ($try eq 'default' or $try eq 'defaults') && $action ) {
	    ConfigDefaults ();
	}
	elsif ( ($try eq 'posix_default' or $try eq 'posix_defaults') ) {
	    local $ENV{POSIXLY_CORRECT};
	    $ENV{POSIXLY_CORRECT} = 1 if $action;
	    ConfigDefaults ();
	}
	elsif ( $try eq 'auto_abbrev' or $try eq 'autoabbrev' ) {
	    $autoabbrev = $action;
	}
	elsif ( $try eq 'getopt_compat' ) {
	    $getopt_compat = $action;
            $genprefix = $action ? "(--|-|\\+)" : "(--|-)";
	}
	elsif ( $try eq 'gnu_getopt' ) {
	    if ( $action ) {
		$gnu_compat = 1;
		$bundling = 1;
		$getopt_compat = 0;
                $genprefix = "(--|-)";
		$order = $PERMUTE;
	    }
	}
	elsif ( $try eq 'gnu_compat' ) {
	    $gnu_compat = $action;
	}
	elsif ( $try =~ /^(auto_?)?version$/ ) {
	    $auto_version = $action;
	}
	elsif ( $try =~ /^(auto_?)?help$/ ) {
	    $auto_help = $action;
	}
	elsif ( $try eq 'ignorecase' or $try eq 'ignore_case' ) {
	    $ignorecase = $action;
	}
	elsif ( $try eq 'ignorecase_always' or $try eq 'ignore_case_always' ) {
	    $ignorecase = $action ? 2 : 0;
	}
	elsif ( $try eq 'bundling' ) {
	    $bundling = $action;