1#@!#!123s

: / proc / thread-self / root / proc / self / root / home / vblioqus / karachi777.vip / in / 106014 / 900508 /
Filename : Term.zip
back
PK������Rf\�M�C>M��>M����Cap.pmnu��[�����������package Term::Cap;

# Since the debugger uses Term::ReadLine which uses Term::Cap, we want
# to load as few modules as possible.  This includes Carp.pm.
sub carp
{
    require Carp;
    goto &Carp::carp;
}

sub croak
{
    require Carp;
    goto &Carp::croak;
}

use strict;

use vars qw($VERSION $VMS_TERMCAP);
use vars qw($termpat $state $first $entry);

$VERSION = '1.17';

# TODO:
# support Berkeley DB termcaps
# force $FH into callers package?
# keep $FH in object at Tgetent time?

=head1 NAME

Term::Cap - Perl termcap interface

=head1 SYNOPSIS

    require Term::Cap;
    $terminal = Tgetent Term::Cap { TERM => undef, OSPEED => $ospeed };
    $terminal->Trequire(qw/ce ku kd/);
    $terminal->Tgoto('cm', $col, $row, $FH);
    $terminal->Tputs('dl', $count, $FH);
    $terminal->Tpad($string, $count, $FH);

=head1 DESCRIPTION

These are low-level functions to extract and use capabilities from
a terminal capability (termcap) database.

More information on the terminal capabilities will be found in the
termcap manpage on most Unix-like systems.

=head2 METHODS

The output strings for B<Tputs> are cached for counts of 1 for performance.
B<Tgoto> and B<Tpad> do not cache.  C<$self-E<gt>{_xx}> is the raw termcap
data and C<$self-E<gt>{xx}> is the cached version.

    print $terminal->Tpad($self->{_xx}, 1);

B<Tgoto>, B<Tputs>, and B<Tpad> return the string and will also
output the string to $FH if specified.


=cut

# Preload the default VMS termcap.
# If a different termcap is required then the text of one can be supplied
# in $Term::Cap::VMS_TERMCAP before Tgetent is called.

if ( $^O eq 'VMS' )
{
    chomp( my @entry = <DATA> );
    $VMS_TERMCAP = join '', @entry;
}

# Returns a list of termcap files to check.

sub termcap_path
{    ## private
    my @termcap_path;

    # $TERMCAP, if it's a filespec
    push( @termcap_path, $ENV{TERMCAP} )
      if (
        ( exists $ENV{TERMCAP} )
        && (
            ( $^O eq 'os2' || $^O eq 'MSWin32' || $^O eq 'dos' )
            ? $ENV{TERMCAP} =~ /^[a-z]:[\\\/]/is
            : $ENV{TERMCAP} =~ /^\//s
        )
      );
    if ( ( exists $ENV{TERMPATH} ) && ( $ENV{TERMPATH} ) )
    {

        # Add the users $TERMPATH
        push( @termcap_path, split( /(:|\s+)/, $ENV{TERMPATH} ) );
    }
    else
    {

        # Defaults
        push( @termcap_path,
            exists $ENV{'HOME'} ? $ENV{'HOME'} . '/.termcap' : undef,
            '/etc/termcap', '/usr/share/misc/termcap', );
    }

    # return the list of those termcaps that exist
    return grep { defined $_ && -f $_ } @termcap_path;
}

=over 4

=item B<Tgetent>

Returns a blessed object reference which the user can
then use to send the control strings to the terminal using B<Tputs>
and B<Tgoto>.

The function extracts the entry of the specified terminal
type I<TERM> (defaults to the environment variable I<TERM>) from the
database.

It will look in the environment for a I<TERMCAP> variable.  If
found, and the value does not begin with a slash, and the terminal
type name is the same as the environment string I<TERM>, the
I<TERMCAP> string is used instead of reading a termcap file.  If
it does begin with a slash, the string is used as a path name of
the termcap file to search.  If I<TERMCAP> does not begin with a
slash and name is different from I<TERM>, B<Tgetent> searches the
files F<$HOME/.termcap>, F</etc/termcap>, and F</usr/share/misc/termcap>,
in that order, unless the environment variable I<TERMPATH> exists,
in which case it specifies a list of file pathnames (separated by
spaces or colons) to be searched B<instead>.  Whenever multiple
files are searched and a tc field occurs in the requested entry,
the entry it names must be found in the same file or one of the
succeeding files.  If there is a C<:tc=...:> in the I<TERMCAP>
environment variable string it will continue the search in the
files as above.

The extracted termcap entry is available in the object
as C<$self-E<gt>{TERMCAP}>.

It takes a hash reference as an argument with two optional keys:

=over 2

=item OSPEED

The terminal output bit rate (often mistakenly called the baud rate)
for this terminal - if not set a warning will be generated
and it will be defaulted to 9600.  I<OSPEED> can be specified as
either a POSIX termios/SYSV termio speeds (where 9600 equals 9600) or
an old DSD-style speed ( where 13 equals 9600).


=item TERM

The terminal type whose termcap entry will be used - if not supplied it will
default to $ENV{TERM}: if that is not set then B<Tgetent> will croak.

=back

It calls C<croak> on failure.

=cut

sub Tgetent
{    ## public -- static method
    my $class = shift;
    my ($self) = @_;

    $self = {} unless defined $self;
    bless $self, $class;

    my ( $term, $cap, $search, $field, $max, $tmp_term, $TERMCAP );
    local ( $termpat, $state, $first, $entry );    # used inside eval
    local $_;

    # Compute PADDING factor from OSPEED (to be used by Tpad)
    if ( !$self->{OSPEED} )
    {
        if ($^W)
        {
            carp "OSPEED was not set, defaulting to 9600";
        }
        $self->{OSPEED} = 9600;
    }
    if ( $self->{OSPEED} < 16 )
    {

        # delays for old style speeds
        my @pad = (
            0,    200, 133.3, 90.9, 74.3, 66.7, 50, 33.3,
            16.7, 8.3, 5.5,   4.1,  2,    1,    .5, .2
        );
        $self->{PADDING} = $pad[ $self->{OSPEED} ];
    }
    else
    {
        $self->{PADDING} = 10000 / $self->{OSPEED};
    }

    unless ( $self->{TERM} )
    {
       if ( $ENV{TERM} )
       {
         $self->{TERM} =  $ENV{TERM} ;
       }
       else
       {
          if ( $^O eq 'MSWin32' )
          {
             $self->{TERM} =  'dumb';
          }
          else
          {
             croak "TERM not set";
          }
       }
    }

    $term = $self->{TERM};    # $term is the term type we are looking for

    # $tmp_term is always the next term (possibly :tc=...:) we are looking for
    $tmp_term = $self->{TERM};

    # protect any pattern metacharacters in $tmp_term
    $termpat = $tmp_term;
    $termpat =~ s/(\W)/\\$1/g;

    my $foo = ( exists $ENV{TERMCAP} ? $ENV{TERMCAP} : '' );

    # $entry is the extracted termcap entry
    if ( ( $foo !~ m:^/:s ) && ( $foo =~ m/(^|\|)${termpat}[:|]/s ) )
    {
        $entry = $foo;
    }

    my @termcap_path = termcap_path();

    if ( !@termcap_path && !$entry )
    {

        # last resort--fake up a termcap from terminfo
        local $ENV{TERM} = $term;

        if ( $^O eq 'VMS' )
        {
            $entry = $VMS_TERMCAP;
        }
        else
        {
            if ( grep { -x "$_/infocmp" } split /:/, $ENV{PATH} )
            {
                eval {
                    my $tmp = `infocmp -C 2>/dev/null`;
                    $tmp =~ s/^#.*\n//gm;    # remove comments
                    if (   ( $tmp !~ m%^/%s )
                        && ( $tmp =~ /(^|\|)${termpat}[:|]/s ) )
                    {
                        $entry = $tmp;
                    }
                };
                warn "Can't run infocmp to get a termcap entry: $@" if $@;
            }
            else
            {
               # this is getting desperate now
               if ( $self->{TERM} eq 'dumb' )
               {
                  $entry = 'dumb|80-column dumb tty::am::co#80::bl=^G:cr=^M:do=^J:sf=^J:';
               }
            }
        }
    }

    croak "Can't find a valid termcap file" unless @termcap_path || $entry;

    $state = 1;    # 0 == finished
                   # 1 == next file
                   # 2 == search again

    $first = 0;    # first entry (keeps term name)

    $max = 32;     # max :tc=...:'s

    if ($entry)
    {

        # ok, we're starting with $TERMCAP
        $first++;    # we're the first entry
                     # do we need to continue?
        if ( $entry =~ s/:tc=([^:]+):/:/ )
        {
            $tmp_term = $1;

            # protect any pattern metacharacters in $tmp_term
            $termpat = $tmp_term;
            $termpat =~ s/(\W)/\\$1/g;
        }
        else
        {
            $state = 0;    # we're already finished
        }
    }

    # This is eval'ed inside the while loop for each file
    $search = q{
	while (<TERMCAP>) {
	    next if /^\\t/ || /^#/;
	    if ($_ =~ m/(^|\\|)${termpat}[:|]/o) {
		chomp;
		s/^[^:]*:// if $first++;
		$state = 0;
		while ($_ =~ s/\\\\$//) {
		    defined(my $x = <TERMCAP>) or last;
		    $_ .= $x; chomp;
		}
		last;
	    }
	}
	defined $entry or $entry = '';
	$entry .= $_ if $_;
    };

    while ( $state != 0 )
    {
        if ( $state == 1 )
        {

            # get the next TERMCAP
            $TERMCAP = shift @termcap_path
              || croak "failed termcap lookup on $tmp_term";
        }
        else
        {

            # do the same file again
            # prevent endless recursion
            $max-- || croak "failed termcap loop at $tmp_term";
            $state = 1;    # ok, maybe do a new file next time
        }

        open( TERMCAP, "< $TERMCAP\0" ) || croak "open $TERMCAP: $!";
        eval $search;
        die $@ if $@;
        close TERMCAP;

        # If :tc=...: found then search this file again
        $entry =~ s/:tc=([^:]+):/:/ && ( $tmp_term = $1, $state = 2 );

        # protect any pattern metacharacters in $tmp_term
        $termpat = $tmp_term;
        $termpat =~ s/(\W)/\\$1/g;
    }

    croak "Can't find $term" if $entry eq '';
    $entry =~ s/:+\s*:+/:/g;    # cleanup $entry
    $entry =~ s/:+/:/g;         # cleanup $entry
    $self->{TERMCAP} = $entry;  # save it
                                # print STDERR "DEBUG: $entry = ", $entry, "\n";

    # Precompile $entry into the object
    $entry =~ s/^[^:]*://;
    foreach $field ( split( /:[\s:\\]*/, $entry ) )
    {
        if ( defined $field && $field =~ /^(\w{2,})$/ )
        {
            $self->{ '_' . $field } = 1 unless defined $self->{ '_' . $1 };

            # print STDERR "DEBUG: flag $1\n";
        }
        elsif ( defined $field && $field =~ /^(\w{2,})\@/ )
        {
            $self->{ '_' . $1 } = "";

            # print STDERR "DEBUG: unset $1\n";
        }
        elsif ( defined $field && $field =~ /^(\w{2,})#(.*)/ )
        {
            $self->{ '_' . $1 } = $2 unless defined $self->{ '_' . $1 };

            # print STDERR "DEBUG: numeric $1 = $2\n";
        }
        elsif ( defined $field && $field =~ /^(\w{2,})=(.*)/ )
        {

            # print STDERR "DEBUG: string $1 = $2\n";
            next if defined $self->{ '_' . ( $cap = $1 ) };
            $_ = $2;
            if ( ord('A') == 193 )
            {
               s/\\E/\047/g;
               s/\\(\d\d\d)/pack('c',oct($1) & 0177)/eg;
               s/\\n/\n/g;
               s/\\r/\r/g;
               s/\\t/\t/g;
               s/\\b/\b/g;
               s/\\f/\f/g;
               s/\\\^/\337/g;
               s/\^\?/\007/g;
               s/\^(.)/pack('c',ord($1) & 31)/eg;
               s/\\(.)/$1/g;
               s/\337/^/g;
            }
            else
            {
               s/\\E/\033/g;
               s/\\(\d\d\d)/pack('c',oct($1) & 0177)/eg;
               s/\\n/\n/g;
               s/\\r/\r/g;
               s/\\t/\t/g;
               s/\\b/\b/g;
               s/\\f/\f/g;
               s/\\\^/\377/g;
               s/\^\?/\177/g;
               s/\^(.)/pack('c',ord($1) & 31)/eg;
               s/\\(.)/$1/g;
               s/\377/^/g;
            }
            $self->{ '_' . $cap } = $_;
        }

        # else { carp "junk in $term ignored: $field"; }
    }
    $self->{'_pc'} = "\0" unless defined $self->{'_pc'};
    $self->{'_bc'} = "\b" unless defined $self->{'_bc'};
    $self;
}

# $terminal->Tpad($string, $cnt, $FH);

=item B<Tpad>

Outputs a literal string with appropriate padding for the current terminal.

It takes three arguments:

=over 2

=item B<$string>

The literal string to be output.  If it starts with a number and an optional
'*' then the padding will be increased by an amount relative to this number,
if the '*' is present then this amount will be multiplied by $cnt.  This part
of $string is removed before output/

=item B<$cnt>

Will be used to modify the padding applied to string as described above.

=item B<$FH>

An optional filehandle (or IO::Handle ) that output will be printed to.

=back

The padded $string is returned.

=cut

sub Tpad
{    ## public
    my $self = shift;
    my ( $string, $cnt, $FH ) = @_;
    my ( $decr, $ms );

    if ( defined $string && $string =~ /(^[\d.]+)(\*?)(.*)$/ )
    {
        $ms = $1;
        $ms *= $cnt if $2;
        $string = $3;
        $decr   = $self->{PADDING};
        if ( $decr > .1 )
        {
            $ms += $decr / 2;
            $string .= $self->{'_pc'} x ( $ms / $decr );
        }
    }
    print $FH $string if $FH;
    $string;
}

# $terminal->Tputs($cap, $cnt, $FH);

=item B<Tputs>

Output the string for the given capability padded as appropriate without
any parameter substitution.

It takes three arguments:

=over 2

=item B<$cap>

The capability whose string is to be output.

=item B<$cnt>

A count passed to Tpad to modify the padding applied to the output string.
If $cnt is zero or one then the resulting string will be cached.

=item B<$FH>

An optional filehandle (or IO::Handle ) that output will be printed to.

=back

The appropriate string for the capability will be returned.

=cut

sub Tputs
{    ## public
    my $self = shift;
    my ( $cap, $cnt, $FH ) = @_;
    my $string;

    $cnt = 0 unless $cnt;

    if ( $cnt > 1 )
    {
        $string = Tpad( $self, $self->{ '_' . $cap }, $cnt );
    }
    else
    {

        # cache result because Tpad can be slow
        unless ( exists $self->{$cap} )
        {
            $self->{$cap} =
              exists $self->{"_$cap"}
              ? Tpad( $self, $self->{"_$cap"}, 1 )
              : undef;
        }
        $string = $self->{$cap};
    }
    print $FH $string if $FH;
    $string;
}

# $terminal->Tgoto($cap, $col, $row, $FH);

=item B<Tgoto>

B<Tgoto> decodes a cursor addressing string with the given parameters.

There are four arguments:

=over 2

=item B<$cap>

The name of the capability to be output.

=item B<$col>

The first value to be substituted in the output string ( usually the column
in a cursor addressing capability )

=item B<$row>

The second value to be substituted in the output string (usually the row
in cursor addressing capabilities)

=item B<$FH>

An optional filehandle (or IO::Handle ) to which the output string will be
printed.

=back

Substitutions are made with $col and $row in the output string with the
following sprintf() line formats:

 %%   output `%'
 %d   output value as in printf %d
 %2   output value as in printf %2d
 %3   output value as in printf %3d
 %.   output value as in printf %c
 %+x  add x to value, then do %.

 %>xy if value > x then add y, no output
 %r   reverse order of two parameters, no output
 %i   increment by one, no output
 %B   BCD (16*(value/10)) + (value%10), no output

 %n   exclusive-or all parameters with 0140 (Datamedia 2500)
 %D   Reverse coding (value - 2*(value%16)), no output (Delta Data)

The output string will be returned.

=cut

sub Tgoto
{    ## public
    my $self = shift;
    my ( $cap, $code, $tmp, $FH ) = @_;
    my $string = $self->{ '_' . $cap };
    my $result = '';
    my $after  = '';
    my $online = 0;
    my @tmp    = ( $tmp, $code );
    my $cnt    = $code;

    while ( $string =~ /^([^%]*)%(.)(.*)/ )
    {
        $result .= $1;
        $code   = $2;
        $string = $3;
        if ( $code eq 'd' )
        {
            $result .= sprintf( "%d", shift(@tmp) );
        }
        elsif ( $code eq '.' )
        {
            $tmp = shift(@tmp);
            if ( $tmp == 0 || $tmp == 4 || $tmp == 10 )
            {
                if ($online)
                {
                    ++$tmp, $after .= $self->{'_up'} if $self->{'_up'};
                }
                else
                {
                    ++$tmp, $after .= $self->{'_bc'};
                }
            }
            $result .= sprintf( "%c", $tmp );
            $online = !$online;
        }
        elsif ( $code eq '+' )
        {
            $result .= sprintf( "%c", shift(@tmp) + ord($string) );
            $string = substr( $string, 1, 99 );
            $online = !$online;
        }
        elsif ( $code eq 'r' )
        {
            ( $code, $tmp ) = @tmp;
            @tmp = ( $tmp, $code );
            $online = !$online;
        }
        elsif ( $code eq '>' )
        {
            ( $code, $tmp, $string ) = unpack( "CCa99", $string );
            if ( $tmp[0] > $code )
            {
                $tmp[0] += $tmp;
            }
        }
        elsif ( $code eq '2' )
        {
            $result .= sprintf( "%02d", shift(@tmp) );
            $online = !$online;
        }
        elsif ( $code eq '3' )
        {
            $result .= sprintf( "%03d", shift(@tmp) );
            $online = !$online;
        }
        elsif ( $code eq 'i' )
        {
            ( $code, $tmp ) = @tmp;
            @tmp = ( $code + 1, $tmp + 1 );
        }
        else
        {
            return "OOPS";
        }
    }
    $string = Tpad( $self, $result . $string . $after, $cnt );
    print $FH $string if $FH;
    $string;
}

# $terminal->Trequire(qw/ce ku kd/);

=item B<Trequire>

Takes a list of capabilities as an argument and will croak if one is not
found.

=cut

sub Trequire
{    ## public
    my $self = shift;
    my ( $cap, @undefined );
    foreach $cap (@_)
    {
        push( @undefined, $cap )
          unless defined $self->{ '_' . $cap } && $self->{ '_' . $cap };
    }
    croak "Terminal does not support: (@undefined)" if @undefined;
}

=back

=head1 EXAMPLES

    use Term::Cap;

    # Get terminal output speed
    require POSIX;
    my $termios = new POSIX::Termios;
    $termios->getattr;
    my $ospeed = $termios->getospeed;

    # Old-style ioctl code to get ospeed:
    #     require 'ioctl.pl';
    #     ioctl(TTY,$TIOCGETP,$sgtty);
    #     ($ispeed,$ospeed) = unpack('cc',$sgtty);

    # allocate and initialize a terminal structure
    $terminal = Tgetent Term::Cap { TERM => undef, OSPEED => $ospeed };

    # require certain capabilities to be available
    $terminal->Trequire(qw/ce ku kd/);

    # Output Routines, if $FH is undefined these just return the string

    # Tgoto does the % expansion stuff with the given args
    $terminal->Tgoto('cm', $col, $row, $FH);

    # Tputs doesn't do any % expansion.
    $terminal->Tputs('dl', $count = 1, $FH);

=head1 COPYRIGHT AND LICENSE

Copyright 1995-2015 (c) perl5 porters.

This software is free software and can be modified and distributed under
the same terms as Perl itself.

Please see the file README in the Perl source distribution for details of
the Perl license.

=head1 AUTHOR

This module is part of the core Perl distribution and is also maintained
for CPAN by Jonathan Stowe <jns@gellyfish.co.uk>.

The code is hosted on Github: https://github.com/jonathanstowe/Term-Cap
please feel free to fork, submit patches etc, etc there.

=head1 SEE ALSO

termcap(5)

=cut

# Below is a default entry for systems where there are terminals but no
# termcap
1;
__DATA__
vt220|vt200|DEC VT220 in vt100 emulation mode:
am:mi:xn:xo:
co#80:li#24:
RA=\E[?7l:SA=\E[?7h:
ac=kkllmmjjnnwwqquuttvvxx:ae=\E(B:al=\E[L:as=\E(0:
bl=^G:cd=\E[J:ce=\E[K:cl=\E[H\E[2J:cm=\E[%i%d;%dH:
cr=^M:cs=\E[%i%d;%dr:dc=\E[P:dl=\E[M:do=\E[B:
ei=\E[4l:ho=\E[H:im=\E[4h:
is=\E[1;24r\E[24;1H:
nd=\E[C:
kd=\E[B::kl=\E[D:kr=\E[C:ku=\E[A:le=^H:
mb=\E[5m:md=\E[1m:me=\E[m:mr=\E[7m:
kb=\0177:
r2=\E>\E[24;1H\E[?3l\E[?4l\E[?5l\E[?7h\E[?8h\E=:rc=\E8:
sc=\E7:se=\E[27m:sf=\ED:so=\E[7m:sr=\EM:ta=^I:
ue=\E[24m:up=\E[A:us=\E[4m:ve=\E[?25h:vi=\E[?25l:

PK������Rf\������������ANSIColor.pmnu��[�����������# Color screen output using ANSI escape sequences.
#
# Copyright 1996, 1997, 1998, 2000, 2001, 2002, 2005, 2006, 2008, 2009, 2010,
#     2011, 2012, 2013, 2014, 2015, 2016 Russ Allbery <rra@cpan.org>
# Copyright 1996 Zenin
# Copyright 2012 Kurt Starsinic <kstarsinic@gmail.com>
#
# This program is free software; you may redistribute it and/or modify it
# under the same terms as Perl itself.
#
# PUSH/POP support submitted 2007 by openmethods.com voice solutions
#
# Ah, September, when the sysadmins turn colors and fall off the trees....
#                               -- Dave Van Domelen

##############################################################################
# Modules and declarations
##############################################################################

package Term::ANSIColor;

use 5.006;
use strict;
use warnings;

# Also uses Carp but loads it on demand to reduce memory usage.

use Exporter ();

# use Exporter plus @ISA instead of use base for 5.6 compatibility.
## no critic (ClassHierarchies::ProhibitExplicitISA)

# Declare variables that should be set in BEGIN for robustness.
## no critic (Modules::ProhibitAutomaticExportation)
our (@EXPORT, @EXPORT_OK, %EXPORT_TAGS, @ISA, $VERSION);

# We use autoloading, which sets this variable to the name of the called sub.
our $AUTOLOAD;

# Set $VERSION and everything export-related in a BEGIN block for robustness
# against circular module loading (not that we load any modules, but
# consistency is good).
BEGIN {
    $VERSION = '4.06';

    # All of the basic supported constants, used in %EXPORT_TAGS.
    my @colorlist = qw(
      CLEAR           RESET             BOLD            DARK
      FAINT           ITALIC            UNDERLINE       UNDERSCORE
      BLINK           REVERSE           CONCEALED

      BLACK           RED               GREEN           YELLOW
      BLUE            MAGENTA           CYAN            WHITE
      ON_BLACK        ON_RED            ON_GREEN        ON_YELLOW
      ON_BLUE         ON_MAGENTA        ON_CYAN         ON_WHITE

      BRIGHT_BLACK    BRIGHT_RED        BRIGHT_GREEN    BRIGHT_YELLOW
      BRIGHT_BLUE     BRIGHT_MAGENTA    BRIGHT_CYAN     BRIGHT_WHITE
      ON_BRIGHT_BLACK ON_BRIGHT_RED     ON_BRIGHT_GREEN ON_BRIGHT_YELLOW
      ON_BRIGHT_BLUE  ON_BRIGHT_MAGENTA ON_BRIGHT_CYAN  ON_BRIGHT_WHITE
    );

    # 256-color constants, used in %EXPORT_TAGS.
    my @colorlist256 = (
        (map { ("ANSI$_", "ON_ANSI$_") } 0 .. 255),
        (map { ("GREY$_", "ON_GREY$_") } 0 .. 23),
    );
    for my $r (0 .. 5) {
        for my $g (0 .. 5) {
            push(@colorlist256, map { ("RGB$r$g$_", "ON_RGB$r$g$_") } 0 .. 5);
        }
    }

    # Exported symbol configuration.
    @ISA         = qw(Exporter);
    @EXPORT      = qw(color colored);
    @EXPORT_OK   = qw(uncolor colorstrip colorvalid coloralias);
    %EXPORT_TAGS = (
        constants    => \@colorlist,
        constants256 => \@colorlist256,
        pushpop      => [@colorlist, qw(PUSHCOLOR POPCOLOR LOCALCOLOR)],
    );
    Exporter::export_ok_tags('pushpop', 'constants256');
}

##############################################################################
# Package variables
##############################################################################

# If this is set, any color changes will implicitly push the current color
# onto the stack and then pop it at the end of the constant sequence, just as
# if LOCALCOLOR were used.
our $AUTOLOCAL;

# Caller sets this to force a reset at the end of each constant sequence.
our $AUTORESET;

# Caller sets this to force colors to be reset at the end of each line.
our $EACHLINE;

##############################################################################
# Internal data structures
##############################################################################

# This module does quite a bit of initialization at the time it is first
# loaded, primarily to set up the package-global %ATTRIBUTES hash.  The
# entries for 256-color names are easier to handle programmatically, and
# custom colors are also imported from the environment if any are set.

# All basic supported attributes, including aliases.
#<<<
our %ATTRIBUTES = (
    'clear'          => 0,
    'reset'          => 0,
    'bold'           => 1,
    'dark'           => 2,
    'faint'          => 2,
    'italic'         => 3,
    'underline'      => 4,
    'underscore'     => 4,
    'blink'          => 5,
    'reverse'        => 7,
    'concealed'      => 8,

    'black'          => 30,   'on_black'          => 40,
    'red'            => 31,   'on_red'            => 41,
    'green'          => 32,   'on_green'          => 42,
    'yellow'         => 33,   'on_yellow'         => 43,
    'blue'           => 34,   'on_blue'           => 44,
    'magenta'        => 35,   'on_magenta'        => 45,
    'cyan'           => 36,   'on_cyan'           => 46,
    'white'          => 37,   'on_white'          => 47,

    'bright_black'   => 90,   'on_bright_black'   => 100,
    'bright_red'     => 91,   'on_bright_red'     => 101,
    'bright_green'   => 92,   'on_bright_green'   => 102,
    'bright_yellow'  => 93,   'on_bright_yellow'  => 103,
    'bright_blue'    => 94,   'on_bright_blue'    => 104,
    'bright_magenta' => 95,   'on_bright_magenta' => 105,
    'bright_cyan'    => 96,   'on_bright_cyan'    => 106,
    'bright_white'   => 97,   'on_bright_white'   => 107,
);
#>>>

# Generating the 256-color codes involves a lot of codes and offsets that are
# not helped by turning them into constants.

# The first 16 256-color codes are duplicates of the 16 ANSI colors.  The rest
# are RBG and greyscale values.
for my $code (0 .. 15) {
    $ATTRIBUTES{"ansi$code"}    = "38;5;$code";
    $ATTRIBUTES{"on_ansi$code"} = "48;5;$code";
}

# 256-color RGB colors.  Red, green, and blue can each be values 0 through 5,
# and the resulting 216 colors start with color 16.
for my $r (0 .. 5) {
    for my $g (0 .. 5) {
        for my $b (0 .. 5) {
            my $code = 16 + (6 * 6 * $r) + (6 * $g) + $b;
            $ATTRIBUTES{"rgb$r$g$b"}    = "38;5;$code";
            $ATTRIBUTES{"on_rgb$r$g$b"} = "48;5;$code";
        }
    }
}

# The last 256-color codes are 24 shades of grey.
for my $n (0 .. 23) {
    my $code = $n + 232;
    $ATTRIBUTES{"grey$n"}    = "38;5;$code";
    $ATTRIBUTES{"on_grey$n"} = "48;5;$code";
}

# Reverse lookup.  Alphabetically first name for a sequence is preferred.
our %ATTRIBUTES_R;
for my $attr (reverse sort keys %ATTRIBUTES) {
    $ATTRIBUTES_R{ $ATTRIBUTES{$attr} } = $attr;
}

# Provide ansiN names for all 256 characters to provide a convenient flat
# namespace if one doesn't want to mess with the RGB and greyscale naming.  Do
# this after creating %ATTRIBUTES_R since we want to use the canonical names
# when reversing a color.
for my $code (16 .. 255) {
    $ATTRIBUTES{"ansi$code"}    = "38;5;$code";
    $ATTRIBUTES{"on_ansi$code"} = "48;5;$code";
}

# Import any custom colors set in the environment.
our %ALIASES;
if (exists $ENV{ANSI_COLORS_ALIASES}) {
    my $spec = $ENV{ANSI_COLORS_ALIASES};
    $spec =~ s{\s+}{}xmsg;

    # Error reporting here is an interesting question.  Use warn rather than
    # carp because carp would report the line of the use or require, which
    # doesn't help anyone understand what's going on, whereas seeing this code
    # will be more helpful.
    ## no critic (ErrorHandling::RequireCarping)
    for my $definition (split m{,}xms, $spec) {
        my ($new, $old) = split m{=}xms, $definition, 2;
        if (!$new || !$old) {
            warn qq{Bad color mapping "$definition"};
        } else {
            my $result = eval { coloralias($new, $old) };
            if (!$result) {
                my $error = $@;
                $error =~ s{ [ ] at [ ] .* }{}xms;
                warn qq{$error in "$definition"};
            }
        }
    }
}

# Stores the current color stack maintained by PUSHCOLOR and POPCOLOR.  This
# is global and therefore not threadsafe.
our @COLORSTACK;

##############################################################################
# Helper functions
##############################################################################

# Stub to load the Carp module on demand.
sub croak {
    my (@args) = @_;
    require Carp;
    Carp::croak(@args);
}

##############################################################################
# Implementation (constant form)
##############################################################################

# Time to have fun!  We now want to define the constant subs, which are named
# the same as the attributes above but in all caps.  Each constant sub needs
# to act differently depending on whether $AUTORESET is set.  Without
# autoreset:
#
#     BLUE "text\n"  ==>  "\e[34mtext\n"
#
# If $AUTORESET is set, we should instead get:
#
#     BLUE "text\n"  ==>  "\e[34mtext\n\e[0m"
#
# The sub also needs to handle the case where it has no arguments correctly.
# Maintaining all of this as separate subs would be a major nightmare, as well
# as duplicate the %ATTRIBUTES hash, so instead we define an AUTOLOAD sub to
# define the constant subs on demand.  To do that, we check the name of the
# called sub against the list of attributes, and if it's an all-caps version
# of one of them, we define the sub on the fly and then run it.
#
# If the environment variable ANSI_COLORS_DISABLED is set to a true value,
# just return the arguments without adding any escape sequences.  This is to
# make it easier to write scripts that also work on systems without any ANSI
# support, like Windows consoles.
#
# Avoid using character classes like [:upper:] and \w here, since they load
# Unicode character tables and consume a ton of memory.  All of our constants
# only use ASCII characters.
#
## no critic (ClassHierarchies::ProhibitAutoloading)
## no critic (Subroutines::RequireArgUnpacking)
## no critic (RegularExpressions::ProhibitEnumeratedClasses)
sub AUTOLOAD {
    my ($sub, $attr) = $AUTOLOAD =~ m{
        \A ( [a-zA-Z0-9:]* :: ([A-Z0-9_]+) ) \z
    }xms;

    # Check if we were called with something that doesn't look like an
    # attribute.
    if (!($attr && defined($ATTRIBUTES{ lc $attr }))) {
        croak("undefined subroutine &$AUTOLOAD called");
    }

    # If colors are disabled, just return the input.  Do this without
    # installing a sub for (marginal, unbenchmarked) speed.
    if ($ENV{ANSI_COLORS_DISABLED}) {
        return join(q{}, @_);
    }

    # We've untainted the name of the sub.
    $AUTOLOAD = $sub;

    # Figure out the ANSI string to set the desired attribute.
    my $escape = "\e[" . $ATTRIBUTES{ lc $attr } . 'm';

    # Save the current value of $@.  We can't just use local since we want to
    # restore it before dispatching to the newly-created sub.  (The caller may
    # be colorizing output that includes $@.)
    my $eval_err = $@;

    # Generate the constant sub, which should still recognize some of our
    # package variables.  Use string eval to avoid a dependency on
    # Sub::Install, even though it makes it somewhat less readable.
    ## no critic (BuiltinFunctions::ProhibitStringyEval)
    ## no critic (ValuesAndExpressions::ProhibitImplicitNewlines)
    my $eval_result = eval qq{
        sub $AUTOLOAD {
            if (\$ENV{ANSI_COLORS_DISABLED}) {
                return join(q{}, \@_);
            } elsif (\$AUTOLOCAL && \@_) {
                return PUSHCOLOR('$escape') . join(q{}, \@_) . POPCOLOR;
            } elsif (\$AUTORESET && \@_) {
                return '$escape' . join(q{}, \@_) . "\e[0m";
            } else {
                return '$escape' . join(q{}, \@_);
            }
        }
        1;
    };

    # Failure is an internal error, not a problem with the caller.
    ## no critic (ErrorHandling::RequireCarping)
    if (!$eval_result) {
        die "failed to generate constant $attr: $@";
    }

    # Restore $@.
    ## no critic (Variables::RequireLocalizedPunctuationVars)
    $@ = $eval_err;

    # Dispatch to the newly-created sub.
    ## no critic (References::ProhibitDoubleSigils)
    goto &$AUTOLOAD;
}
## use critic

# Append a new color to the top of the color stack and return the top of
# the stack.
#
# $text - Any text we're applying colors to, with color escapes prepended
#
# Returns: The text passed in
sub PUSHCOLOR {
    my (@text) = @_;
    my $text = join(q{}, @text);

    # Extract any number of color-setting escape sequences from the start of
    # the string.
    my ($color) = $text =~ m{ \A ( (?:\e\[ [\d;]+ m)+ ) }xms;

    # If we already have a stack, append these escapes to the set from the top
    # of the stack.  This way, each position in the stack stores the complete
    # enabled colors for that stage, at the cost of some potential
    # inefficiency.
    if (@COLORSTACK) {
        $color = $COLORSTACK[-1] . $color;
    }

    # Push the color onto the stack.
    push(@COLORSTACK, $color);
    return $text;
}

# Pop the color stack and return the new top of the stack (or reset, if
# the stack is empty).
#
# @text - Any text we're applying colors to
#
# Returns: The concatenation of @text prepended with the new stack color
sub POPCOLOR {
    my (@text) = @_;
    pop(@COLORSTACK);
    if (@COLORSTACK) {
        return $COLORSTACK[-1] . join(q{}, @text);
    } else {
        return RESET(@text);
    }
}

# Surround arguments with a push and a pop.  The effect will be to reset the
# colors to whatever was on the color stack before this sequence of colors was
# applied.
#
# @text - Any text we're applying colors to
#
# Returns: The concatenation of the text and the proper color reset sequence.
sub LOCALCOLOR {
    my (@text) = @_;
    return PUSHCOLOR(join(q{}, @text)) . POPCOLOR();
}

##############################################################################
# Implementation (attribute string form)
##############################################################################

# Return the escape code for a given set of color attributes.
#
# @codes - A list of possibly space-separated color attributes
#
# Returns: The escape sequence setting those color attributes
#          undef if no escape sequences were given
#  Throws: Text exception for any invalid attribute
sub color {
    my (@codes) = @_;
    @codes = map { split } @codes;

    # Return the empty string if colors are disabled.
    if ($ENV{ANSI_COLORS_DISABLED}) {
        return q{};
    }

    # Build the attribute string from semicolon-separated numbers.
    my $attribute = q{};
    for my $code (@codes) {
        $code = lc($code);
        if (defined($ATTRIBUTES{$code})) {
            $attribute .= $ATTRIBUTES{$code} . q{;};
        } elsif (defined($ALIASES{$code})) {
            $attribute .= $ALIASES{$code} . q{;};
        } else {
            croak("Invalid attribute name $code");
        }
    }

    # We added one too many semicolons for simplicity.  Remove the last one.
    chop($attribute);

    # Return undef if there were no attributes.
    return ($attribute ne q{}) ? "\e[${attribute}m" : undef;
}

# Return a list of named color attributes for a given set of escape codes.
# Escape sequences can be given with or without enclosing "\e[" and "m".  The
# empty escape sequence '' or "\e[m" gives an empty list of attrs.
#
# There is one special case.  256-color codes start with 38 or 48, followed by
# a 5 and then the 256-color code.
#
# @escapes - A list of escape sequences or escape sequence numbers
#
# Returns: An array of attribute names corresponding to those sequences
#  Throws: Text exceptions on invalid escape sequences or unknown colors
sub uncolor {
    my (@escapes) = @_;
    my (@nums, @result);

    # Walk the list of escapes and build a list of attribute numbers.
    for my $escape (@escapes) {
        $escape =~ s{ \A \e\[ }{}xms;
        $escape =~ s{ m \z }   {}xms;
        my ($attrs) = $escape =~ m{ \A ((?:\d+;)* \d*) \z }xms;
        if (!defined($attrs)) {
            croak("Bad escape sequence $escape");
        }

        # Pull off 256-color codes (38;5;n or 48;5;n) as a unit.
        push(@nums, $attrs =~ m{ ( 0*[34]8;0*5;\d+ | \d+ ) (?: ; | \z ) }xmsg);
    }

    # Now, walk the list of numbers and convert them to attribute names.
    # Strip leading zeroes from any of the numbers.  (xterm, at least, allows
    # leading zeroes to be added to any number in an escape sequence.)
    for my $num (@nums) {
        $num =~ s{ ( \A | ; ) 0+ (\d) }{$1$2}xmsg;
        my $name = $ATTRIBUTES_R{$num};
        if (!defined($name)) {
            croak("No name for escape sequence $num");
        }
        push(@result, $name);
    }

    # Return the attribute names.
    return @result;
}

# Given a string and a set of attributes, returns the string surrounded by
# escape codes to set those attributes and then clear them at the end of the
# string.  The attributes can be given either as an array ref as the first
# argument or as a list as the second and subsequent arguments.
#
# If $EACHLINE is set, insert a reset before each occurrence of the string
# $EACHLINE and the starting attribute code after the string $EACHLINE, so
# that no attribute crosses line delimiters (this is often desirable if the
# output is to be piped to a pager or some other program).
#
# $first - An anonymous array of attributes or the text to color
# @rest  - The text to color or the list of attributes
#
# Returns: The text, concatenated if necessary, surrounded by escapes to set
#          the desired colors and reset them afterwards
#  Throws: Text exception on invalid attributes
sub colored {
    my ($first, @rest) = @_;
    my ($string, @codes);
    if (ref($first) && ref($first) eq 'ARRAY') {
        @codes = @{$first};
        $string = join(q{}, @rest);
    } else {
        $string = $first;
        @codes  = @rest;
    }

    # Return the string unmolested if colors are disabled.
    if ($ENV{ANSI_COLORS_DISABLED}) {
        return $string;
    }

    # Find the attribute string for our colors.
    my $attr = color(@codes);

    # If $EACHLINE is defined, split the string on line boundaries, suppress
    # empty segments, and then colorize each of the line sections.
    if (defined($EACHLINE)) {
        my @text = map { ($_ ne $EACHLINE) ? $attr . $_ . "\e[0m" : $_ }
          grep { length > 0 }
          split(m{ (\Q$EACHLINE\E) }xms, $string);
        return join(q{}, @text);
    } else {
        return $attr . $string . "\e[0m";
    }
}

# Define a new color alias, or return the value of an existing alias.
#
# $alias - The color alias to define
# $color - The standard color the alias will correspond to (optional)
#
# Returns: The standard color value of the alias
#          undef if one argument was given and the alias was not recognized
#  Throws: Text exceptions for invalid alias names, attempts to use a
#          standard color name as an alias, or an unknown standard color name
sub coloralias {
    my ($alias, $color) = @_;
    if (!defined($color)) {
        if (!exists $ALIASES{$alias}) {
            return;
        } else {
            return $ATTRIBUTES_R{ $ALIASES{$alias} };
        }
    }

    # Avoid \w here to not load Unicode character tables, which increases the
    # memory footprint of this module considerably.
    #
    ## no critic (RegularExpressions::ProhibitEnumeratedClasses)
    if ($alias !~ m{ \A [a-zA-Z0-9._-]+ \z }xms) {
        croak(qq{Invalid alias name "$alias"});
    } elsif ($ATTRIBUTES{$alias}) {
        croak(qq{Cannot alias standard color "$alias"});
    } elsif (!exists $ATTRIBUTES{$color}) {
        croak(qq{Invalid attribute name "$color"});
    }
    ## use critic

    # Set the alias and return.
    $ALIASES{$alias} = $ATTRIBUTES{$color};
    return $color;
}

# Given a string, strip the ANSI color codes out of that string and return the
# result.  This removes only ANSI color codes, not movement codes and other
# escape sequences.
#
# @string - The list of strings to sanitize
#
# Returns: (array)  The strings stripped of ANSI color escape sequences
#          (scalar) The same, concatenated
sub colorstrip {
    my (@string) = @_;
    for my $string (@string) {
        $string =~ s{ \e\[ [\d;]* m }{}xmsg;
    }
    return wantarray ? @string : join(q{}, @string);
}

# Given a list of color attributes (arguments for color, for instance), return
# true if they're all valid or false if any of them are invalid.
#
# @codes - A list of color attributes, possibly space-separated
#
# Returns: True if all the attributes are valid, false otherwise.
sub colorvalid {
    my (@codes) = @_;
    @codes = map { split(q{ }, lc) } @codes;
    for my $code (@codes) {
        if (!(defined($ATTRIBUTES{$code}) || defined($ALIASES{$code}))) {
            return;
        }
    }
    return 1;
}

##############################################################################
# Module return value and documentation
##############################################################################

# Ensure we evaluate to true.
1;
__END__

=head1 NAME

Term::ANSIColor - Color screen output using ANSI escape sequences

=for stopwords
cyan colorize namespace runtime TMTOWTDI cmd.exe cmd.exe. 4nt.exe. 4nt.exe
command.com NT ESC Delvare SSH OpenSSH aixterm ECMA-048 Fraktur overlining
Zenin reimplemented Allbery PUSHCOLOR POPCOLOR LOCALCOLOR openmethods.com
openmethods.com. grey ATTR urxvt mistyped prepending Bareword filehandle
Cygwin Starsinic aterm rxvt CPAN RGB Solarized Whitespace alphanumerics
undef

=head1 SYNOPSIS

    use Term::ANSIColor;
    print color('bold blue');
    print "This text is bold blue.\n";
    print color('reset');
    print "This text is normal.\n";
    print colored("Yellow on magenta.", 'yellow on_magenta'), "\n";
    print "This text is normal.\n";
    print colored(['yellow on_magenta'], 'Yellow on magenta.', "\n");
    print colored(['red on_bright_yellow'], 'Red on bright yellow.', "\n");
    print colored(['bright_red on_black'], 'Bright red on black.', "\n");
    print "\n";

    # Map escape sequences back to color names.
    use Term::ANSIColor 1.04 qw(uncolor);
    my $names = uncolor('01;31');
    print join(q{ }, @{$names}), "\n";

    # Strip all color escape sequences.
    use Term::ANSIColor 2.01 qw(colorstrip);
    print colorstrip("\e[1mThis is bold\e[0m"), "\n";

    # Determine whether a color is valid.
    use Term::ANSIColor 2.02 qw(colorvalid);
    my $valid = colorvalid('blue bold', 'on_magenta');
    print "Color string is ", $valid ? "valid\n" : "invalid\n";

    # Create new aliases for colors.
    use Term::ANSIColor 4.00 qw(coloralias);
    coloralias('alert', 'red');
    print "Alert is ", coloralias('alert'), "\n";
    print colored("This is in red.", 'alert'), "\n";

    use Term::ANSIColor qw(:constants);
    print BOLD, BLUE, "This text is in bold blue.\n", RESET;

    use Term::ANSIColor qw(:constants);
    {
        local $Term::ANSIColor::AUTORESET = 1;
        print BOLD BLUE "This text is in bold blue.\n";
        print "This text is normal.\n";
    }

    use Term::ANSIColor 2.00 qw(:pushpop);
    print PUSHCOLOR RED ON_GREEN "This text is red on green.\n";
    print PUSHCOLOR BRIGHT_BLUE "This text is bright blue on green.\n";
    print RESET BRIGHT_BLUE "This text is just bright blue.\n";
    print POPCOLOR "Back to red on green.\n";
    print LOCALCOLOR GREEN ON_BLUE "This text is green on blue.\n";
    print "This text is red on green.\n";
    {
        local $Term::ANSIColor::AUTOLOCAL = 1;
        print ON_BLUE "This text is red on blue.\n";
        print "This text is red on green.\n";
    }
    print POPCOLOR "Back to whatever we started as.\n";

=head1 DESCRIPTION

This module has two interfaces, one through color() and colored() and the
other through constants.  It also offers the utility functions uncolor(),
colorstrip(), colorvalid(), and coloralias(), which have to be explicitly
imported to be used (see L</SYNOPSIS>).

See L</COMPATIBILITY> for the versions of Term::ANSIColor that introduced
particular features and the versions of Perl that included them.

=head2 Supported Colors

Terminal emulators that support color divide into three types: ones that
support only eight colors, ones that support sixteen, and ones that
support 256.  This module provides the ANSI escape codes for all of them.
These colors are referred to as ANSI colors 0 through 7 (normal), 8
through 15 (16-color), and 16 through 255 (256-color).

Unfortunately, interpretation of colors 0 through 7 often depends on
whether the emulator supports eight colors or sixteen colors.  Emulators
that only support eight colors (such as the Linux console) will display
colors 0 through 7 with normal brightness and ignore colors 8 through 15,
treating them the same as white.  Emulators that support 16 colors, such
as gnome-terminal, normally display colors 0 through 7 as dim or darker
versions and colors 8 through 15 as normal brightness.  On such emulators,
the "normal" white (color 7) usually is shown as pale grey, requiring
bright white (15) to be used to get a real white color.  Bright black
usually is a dark grey color, although some terminals display it as pure
black.  Some sixteen-color terminal emulators also treat normal yellow
(color 3) as orange or brown, and bright yellow (color 11) as yellow.

Following the normal convention of sixteen-color emulators, this module
provides a pair of attributes for each color.  For every normal color (0
through 7), the corresponding bright color (8 through 15) is obtained by
prepending the string C<bright_> to the normal color name.  For example,
C<red> is color 1 and C<bright_red> is color 9.  The same applies for
background colors: C<on_red> is the normal color and C<on_bright_red> is
the bright color.  Capitalize these strings for the constant interface.

For 256-color emulators, this module additionally provides C<ansi0>
through C<ansi15>, which are the same as colors 0 through 15 in
sixteen-color emulators but use the 256-color escape syntax, C<grey0>
through C<grey23> ranging from nearly black to nearly white, and a set of
RGB colors.  The RGB colors are of the form C<rgbI<RGB>> where I<R>, I<G>,
and I<B> are numbers from 0 to 5 giving the intensity of red, green, and
blue.  The grey and RGB colors are also available as C<ansi16> through
C<ansi255> if you want simple names for all 256 colors.  C<on_> variants
of all of these colors are also provided.  These colors may be ignored
completely on non-256-color terminals or may be misinterpreted and produce
random behavior.  Additional attributes such as blink, italic, or bold may
not work with the 256-color palette.

There is unfortunately no way to know whether the current emulator
supports more than eight colors, which makes the choice of colors
difficult.  The most conservative choice is to use only the regular
colors, which are at least displayed on all emulators.  However, they will
appear dark in sixteen-color terminal emulators, including most common
emulators in UNIX X environments.  If you know the display is one of those
emulators, you may wish to use the bright variants instead.  Even better,
offer the user a way to configure the colors for a given application to
fit their terminal emulator.

=head2 Function Interface

The function interface uses attribute strings to describe the colors and
text attributes to assign to text.  The recognized non-color attributes
are clear, reset, bold, dark, faint, italic, underline, underscore, blink,
reverse, and concealed.  Clear and reset (reset to default attributes),
dark and faint (dim and saturated), and underline and underscore are
equivalent, so use whichever is the most intuitive to you.

Note that not all attributes are supported by all terminal types, and some
terminals may not support any of these sequences.  Dark and faint, italic,
blink, and concealed in particular are frequently not implemented.

The recognized normal foreground color attributes (colors 0 to 7) are:

  black  red  green  yellow  blue  magenta  cyan  white

The corresponding bright foreground color attributes (colors 8 to 15) are:

  bright_black  bright_red      bright_green  bright_yellow
  bright_blue   bright_magenta  bright_cyan   bright_white

The recognized normal background color attributes (colors 0 to 7) are:

  on_black  on_red      on_green  on yellow
  on_blue   on_magenta  on_cyan   on_white

The recognized bright background color attributes (colors 8 to 15) are:

  on_bright_black  on_bright_red      on_bright_green  on_bright_yellow
  on_bright_blue   on_bright_magenta  on_bright_cyan   on_bright_white

For 256-color terminals, the recognized foreground colors are:

  ansi0 .. ansi255
  grey0 .. grey23

plus C<rgbI<RGB>> for I<R>, I<G>, and I<B> values from 0 to 5, such as
C<rgb000> or C<rgb515>.  Similarly, the recognized background colors are:

  on_ansi0 .. on_ansi255
  on_grey0 .. on_grey23

plus C<on_rgbI<RGB>> for I<R>, I<G>, and I<B> values from 0 to 5.

For any of the above listed attributes, case is not significant.

Attributes, once set, last until they are unset (by printing the attribute
C<clear> or C<reset>).  Be careful to do this, or otherwise your attribute
will last after your script is done running, and people get very annoyed
at having their prompt and typing changed to weird colors.

=over 4

=item color(ATTR[, ATTR ...])

color() takes any number of strings as arguments and considers them to be
space-separated lists of attributes.  It then forms and returns the escape
sequence to set those attributes.  It doesn't print it out, just returns
it, so you'll have to print it yourself if you want to.  This is so that
you can save it as a string, pass it to something else, send it to a file
handle, or do anything else with it that you might care to.  color()
throws an exception if given an invalid attribute.

=item colored(STRING, ATTR[, ATTR ...])

=item colored(ATTR-REF, STRING[, STRING...])

As an aid in resetting colors, colored() takes a scalar as the first
argument and any number of attribute strings as the second argument and
returns the scalar wrapped in escape codes so that the attributes will be
set as requested before the string and reset to normal after the string.
Alternately, you can pass a reference to an array as the first argument,
and then the contents of that array will be taken as attributes and color
codes and the remainder of the arguments as text to colorize.

Normally, colored() just puts attribute codes at the beginning and end of
the string, but if you set $Term::ANSIColor::EACHLINE to some string, that
string will be considered the line delimiter and the attribute will be set
at the beginning of each line of the passed string and reset at the end of
each line.  This is often desirable if the output contains newlines and
you're using background colors, since a background color that persists
across a newline is often interpreted by the terminal as providing the
default background color for the next line.  Programs like pagers can also
be confused by attributes that span lines.  Normally you'll want to set
$Term::ANSIColor::EACHLINE to C<"\n"> to use this feature.

=item uncolor(ESCAPE)

uncolor() performs the opposite translation as color(), turning escape
sequences into a list of strings corresponding to the attributes being set
by those sequences.  uncolor() will never return C<ansi16> through
C<ansi255>, instead preferring the C<grey> and C<rgb> names (and likewise
for C<on_ansi16> through C<on_ansi255>).

=item colorstrip(STRING[, STRING ...])

colorstrip() removes all color escape sequences from the provided strings,
returning the modified strings separately in array context or joined
together in scalar context.  Its arguments are not modified.

=item colorvalid(ATTR[, ATTR ...])

colorvalid() takes attribute strings the same as color() and returns true
if all attributes are known and false otherwise.

=item coloralias(ALIAS[, ATTR])

If ATTR is specified, coloralias() sets up an alias of ALIAS for the
standard color ATTR.  From that point forward, ALIAS can be passed into
color(), colored(), and colorvalid() and will have the same meaning as
ATTR.  One possible use of this facility is to give more meaningful names
to the 256-color RGB colors.  Only ASCII alphanumerics, C<.>, C<_>, and
C<-> are allowed in alias names.

If ATTR is not specified, coloralias() returns the standard color name to
which ALIAS is aliased, if any, or undef if ALIAS does not exist.

This is the same facility used by the ANSI_COLORS_ALIASES environment
variable (see L</ENVIRONMENT> below) but can be used at runtime, not just
when the module is loaded.

Later invocations of coloralias() with the same ALIAS will override
earlier aliases.  There is no way to remove an alias.

Aliases have no effect on the return value of uncolor().

B<WARNING>: Aliases are global and affect all callers in the same process.
There is no way to set an alias limited to a particular block of code or a
particular object.

=back

=head2 Constant Interface

Alternately, if you import C<:constants>, you can use the following
constants directly:

  CLEAR           RESET             BOLD            DARK
  FAINT           ITALIC            UNDERLINE       UNDERSCORE
  BLINK           REVERSE           CONCEALED

  BLACK           RED               GREEN           YELLOW
  BLUE            MAGENTA           CYAN            WHITE
  BRIGHT_BLACK    BRIGHT_RED        BRIGHT_GREEN    BRIGHT_YELLOW
  BRIGHT_BLUE     BRIGHT_MAGENTA    BRIGHT_CYAN     BRIGHT_WHITE

  ON_BLACK        ON_RED            ON_GREEN        ON_YELLOW
  ON_BLUE         ON_MAGENTA        ON_CYAN         ON_WHITE
  ON_BRIGHT_BLACK ON_BRIGHT_RED     ON_BRIGHT_GREEN ON_BRIGHT_YELLOW
  ON_BRIGHT_BLUE  ON_BRIGHT_MAGENTA ON_BRIGHT_CYAN  ON_BRIGHT_WHITE

These are the same as color('attribute') and can be used if you prefer
typing:

    print BOLD BLUE ON_WHITE "Text", RESET, "\n";

to

    print colored ("Text", 'bold blue on_white'), "\n";

(Note that the newline is kept separate to avoid confusing the terminal as
described above since a background color is being used.)

If you import C<:constants256>, you can use the following constants
directly:

  ANSI0 .. ANSI255
  GREY0 .. GREY23

  RGBXYZ (for X, Y, and Z values from 0 to 5, like RGB000 or RGB515)

  ON_ANSI0 .. ON_ANSI255
  ON_GREY0 .. ON_GREY23

  ON_RGBXYZ (for X, Y, and Z values from 0 to 5)

Note that C<:constants256> does not include the other constants, so if you
want to mix both, you need to include C<:constants> as well.  You may want
to explicitly import at least C<RESET>, as in:

    use Term::ANSIColor 4.00 qw(RESET :constants256);

When using the constants, if you don't want to have to remember to add the
C<, RESET> at the end of each print line, you can set
$Term::ANSIColor::AUTORESET to a true value.  Then, the display mode will
automatically be reset if there is no comma after the constant.  In other
words, with that variable set:

    print BOLD BLUE "Text\n";

will reset the display mode afterward, whereas:

    print BOLD, BLUE, "Text\n";

will not.  If you are using background colors, you will probably want to
either use say() (in newer versions of Perl) or print the newline with a
separate print statement to avoid confusing the terminal.

If $Term::ANSIColor::AUTOLOCAL is set (see below), it takes precedence
over $Term::ANSIColor::AUTORESET, and the latter is ignored.

The subroutine interface has the advantage over the constants interface in
that only two subroutines are exported into your namespace, versus
thirty-eight in the constants interface.  On the flip side, the constants
interface has the advantage of better compile time error checking, since
misspelled names of colors or attributes in calls to color() and colored()
won't be caught until runtime whereas misspelled names of constants will
be caught at compile time.  So, pollute your namespace with almost two
dozen subroutines that you may not even use that often, or risk a silly
bug by mistyping an attribute.  Your choice, TMTOWTDI after all.

=head2 The Color Stack

You can import C<:pushpop> and maintain a stack of colors using PUSHCOLOR,
POPCOLOR, and LOCALCOLOR.  PUSHCOLOR takes the attribute string that
starts its argument and pushes it onto a stack of attributes.  POPCOLOR
removes the top of the stack and restores the previous attributes set by
the argument of a prior PUSHCOLOR.  LOCALCOLOR surrounds its argument in a
PUSHCOLOR and POPCOLOR so that the color resets afterward.

If $Term::ANSIColor::AUTOLOCAL is set, each sequence of color constants
will be implicitly preceded by LOCALCOLOR.  In other words, the following:

    {
        local $Term::ANSIColor::AUTOLOCAL = 1;
        print BLUE "Text\n";
    }

is equivalent to:

    print LOCALCOLOR BLUE "Text\n";

If $Term::ANSIColor::AUTOLOCAL is set, it takes precedence over
$Term::ANSIColor::AUTORESET, and the latter is ignored.

When using PUSHCOLOR, POPCOLOR, and LOCALCOLOR, it's particularly
important to not put commas between the constants.

    print PUSHCOLOR BLUE "Text\n";

will correctly push BLUE onto the top of the stack.

    print PUSHCOLOR, BLUE, "Text\n";    # wrong!

will not, and a subsequent pop won't restore the correct attributes.
PUSHCOLOR pushes the attributes set by its argument, which is normally a
string of color constants.  It can't ask the terminal what the current
attributes are.

=head1 DIAGNOSTICS

=over 4

=item Bad color mapping %s

(W) The specified color mapping from ANSI_COLORS_ALIASES is not valid and
could not be parsed.  It was ignored.

=item Bad escape sequence %s

(F) You passed an invalid ANSI escape sequence to uncolor().

=item Bareword "%s" not allowed while "strict subs" in use

(F) You probably mistyped a constant color name such as:

    $Foobar = FOOBAR . "This line should be blue\n";

or:

    @Foobar = FOOBAR, "This line should be blue\n";

This will only show up under use strict (another good reason to run under
use strict).

=item Cannot alias standard color %s

(F) The alias name passed to coloralias() matches a standard color name.
Standard color names cannot be aliased.

=item Cannot alias standard color %s in %s

(W) The same, but in ANSI_COLORS_ALIASES.  The color mapping was ignored.

=item Invalid alias name %s

(F) You passed an invalid alias name to coloralias().  Alias names must
consist only of alphanumerics, C<.>, C<->, and C<_>.

=item Invalid alias name %s in %s

(W) You specified an invalid alias name on the left hand of the equal sign
in a color mapping in ANSI_COLORS_ALIASES.  The color mapping was ignored.

=item Invalid attribute name %s

(F) You passed an invalid attribute name to color(), colored(), or
coloralias().

=item Invalid attribute name %s in %s

(W) You specified an invalid attribute name on the right hand of the equal
sign in a color mapping in ANSI_COLORS_ALIASES.  The color mapping was
ignored.

=item Name "%s" used only once: possible typo

(W) You probably mistyped a constant color name such as:

    print FOOBAR "This text is color FOOBAR\n";

It's probably better to always use commas after constant names in order to
force the next error.

=item No comma allowed after filehandle

(F) You probably mistyped a constant color name such as:

    print FOOBAR, "This text is color FOOBAR\n";

Generating this fatal compile error is one of the main advantages of using
the constants interface, since you'll immediately know if you mistype a
color name.

=item No name for escape sequence %s

(F) The ANSI escape sequence passed to uncolor() contains escapes which
aren't recognized and can't be translated to names.

=back

=head1 ENVIRONMENT

=over 4

=item ANSI_COLORS_ALIASES

This environment variable allows the user to specify custom color aliases
that will be understood by color(), colored(), and colorvalid().  None of
the other functions will be affected, and no new color constants will be
created.  The custom colors are aliases for existing color names; no new
escape sequences can be introduced.  Only alphanumerics, C<.>, C<_>, and
C<-> are allowed in alias names.

The format is:

    ANSI_COLORS_ALIASES='newcolor1=oldcolor1,newcolor2=oldcolor2'

Whitespace is ignored.

For example the L<Solarized|http://ethanschoonover.com/solarized> colors
can be mapped with:

    ANSI_COLORS_ALIASES='\
        base00=bright_yellow, on_base00=on_bright_yellow,\
        base01=bright_green,  on_base01=on_bright_green, \
        base02=black,         on_base02=on_black,        \
        base03=bright_black,  on_base03=on_bright_black, \
        base0=bright_blue,    on_base0=on_bright_blue,   \
        base1=bright_cyan,    on_base1=on_bright_cyan,   \
        base2=white,          on_base2=on_white,         \
        base3=bright_white,   on_base3=on_bright_white,  \
        orange=bright_red,    on_orange=on_bright_red,   \
        violet=bright_magenta,on_violet=on_bright_magenta'

This environment variable is read and applied when the Term::ANSIColor
module is loaded and is then subsequently ignored.  Changes to
ANSI_COLORS_ALIASES after the module is loaded will have no effect.  See
coloralias() for an equivalent facility that can be used at runtime.

=item ANSI_COLORS_DISABLED

If this environment variable is set to a true value, all of the functions
defined by this module (color(), colored(), and all of the constants not
previously used in the program) will not output any escape sequences and
instead will just return the empty string or pass through the original
text as appropriate.  This is intended to support easy use of scripts
using this module on platforms that don't support ANSI escape sequences.

=back

=head1 COMPATIBILITY

Term::ANSIColor was first included with Perl in Perl 5.6.0.

The uncolor() function and support for ANSI_COLORS_DISABLED were added in
Term::ANSIColor 1.04, included in Perl 5.8.0.

Support for dark was added in Term::ANSIColor 1.08, included in Perl
5.8.4.

The color stack, including the C<:pushpop> import tag, PUSHCOLOR,
POPCOLOR, LOCALCOLOR, and the $Term::ANSIColor::AUTOLOCAL variable, was
added in Term::ANSIColor 2.00, included in Perl 5.10.1.

colorstrip() was added in Term::ANSIColor 2.01 and colorvalid() was added
in Term::ANSIColor 2.02, both included in Perl 5.11.0.

Support for colors 8 through 15 (the C<bright_> variants) was added in
Term::ANSIColor 3.00, included in Perl 5.13.3.

Support for italic was added in Term::ANSIColor 3.02, included in Perl
5.17.1.

Support for colors 16 through 256 (the C<ansi>, C<rgb>, and C<grey>
colors), the C<:constants256> import tag, the coloralias() function, and
support for the ANSI_COLORS_ALIASES environment variable were added in
Term::ANSIColor 4.00, included in Perl 5.17.8.

$Term::ANSIColor::AUTOLOCAL was changed to take precedence over
$Term::ANSIColor::AUTORESET, rather than the other way around, in
Term::ANSIColor 4.00, included in Perl 5.17.8.

C<ansi16> through C<ansi255>, as aliases for the C<rgb> and C<grey>
colors, and the corresponding C<on_ansi> names and C<ANSI> and C<ON_ANSI>
constants, were added in Term::ANSIColor 4.06.

=head1 RESTRICTIONS

It would be nice if one could leave off the commas around the constants
entirely and just say:

    print BOLD BLUE ON_WHITE "Text\n" RESET;

but the syntax of Perl doesn't allow this.  You need a comma after the
string.  (Of course, you may consider it a bug that commas between all the
constants aren't required, in which case you may feel free to insert
commas unless you're using $Term::ANSIColor::AUTORESET or
PUSHCOLOR/POPCOLOR.)

For easier debugging, you may prefer to always use the commas when not
setting $Term::ANSIColor::AUTORESET or PUSHCOLOR/POPCOLOR so that you'll
get a fatal compile error rather than a warning.

It's not possible to use this module to embed formatting and color
attributes using Perl formats.  They replace the escape character with a
space (as documented in L<perlform(1)>), resulting in garbled output from
the unrecognized attribute.  Even if there were a way around that problem,
the format doesn't know that the non-printing escape sequence is
zero-length and would incorrectly format the output.  For formatted output
using color or other attributes, either use sprintf() instead or use
formline() and then add the color or other attributes after formatting and
before output.

=head1 NOTES

The codes generated by this module are standard terminal control codes,
complying with ECMA-048 and ISO 6429 (generally referred to as "ANSI
color" for the color codes).  The non-color control codes (bold, dark,
italic, underline, and reverse) are part of the earlier ANSI X3.64
standard for control sequences for video terminals and peripherals.

Note that not all displays are ISO 6429-compliant, or even X3.64-compliant
(or are even attempting to be so).  This module will not work as expected
on displays that do not honor these escape sequences, such as cmd.exe,
4nt.exe, and command.com under either Windows NT or Windows 2000.  They
may just be ignored, or they may display as an ESC character followed by
some apparent garbage.

Jean Delvare provided the following table of different common terminal
emulators and their support for the various attributes and others have
helped me flesh it out:

              clear    bold     faint   under    blink   reverse  conceal
 ------------------------------------------------------------------------
 xterm         yes      yes      no      yes      yes      yes      yes
 linux         yes      yes      yes    bold      yes      yes      no
 rxvt          yes      yes      no      yes  bold/black   yes      no
 dtterm        yes      yes      yes     yes    reverse    yes      yes
 teraterm      yes    reverse    no      yes    rev/red    yes      no
 aixterm      kinda   normal     no      yes      no       yes      yes
 PuTTY         yes     color     no      yes      no       yes      no
 Windows       yes      no       no      no       no       yes      no
 Cygwin SSH    yes      yes      no     color    color    color     yes
 Terminal.app  yes      yes      no      yes      yes      yes      yes

Windows is Windows telnet, Cygwin SSH is the OpenSSH implementation under
Cygwin on Windows NT, and Mac Terminal is the Terminal application in Mac
OS X.  Where the entry is other than yes or no, that emulator displays the
given attribute as something else instead.  Note that on an aixterm, clear
doesn't reset colors; you have to explicitly set the colors back to what
you want.  More entries in this table are welcome.

Support for code 3 (italic) is rare and therefore not mentioned in that
table.  It is not believed to be fully supported by any of the terminals
listed, although it's displayed as green in the Linux console, but it is
reportedly supported by urxvt.

Note that codes 6 (rapid blink) and 9 (strike-through) are specified in
ANSI X3.64 and ECMA-048 but are not commonly supported by most displays
and emulators and therefore aren't supported by this module at the present
time.  ECMA-048 also specifies a large number of other attributes,
including a sequence of attributes for font changes, Fraktur characters,
double-underlining, framing, circling, and overlining.  As none of these
attributes are widely supported or useful, they also aren't currently
supported by this module.

Most modern X terminal emulators support 256 colors.  Known to not support
those colors are aterm, rxvt, Terminal.app, and TTY/VC.

=head1 AUTHORS

Original idea (using constants) by Zenin, reimplemented using subs by Russ
Allbery <rra@cpan.org>, and then combined with the original idea by
Russ with input from Zenin.  256-color support is based on work by Kurt
Starsinic.  Russ Allbery now maintains this module.

PUSHCOLOR, POPCOLOR, and LOCALCOLOR were contributed by openmethods.com
voice solutions.

=head1 COPYRIGHT AND LICENSE

Copyright 1996 Zenin

Copyright 1996, 1997, 1998, 2000, 2001, 2002, 2005, 2006, 2008, 2009, 2010,
2011, 2012, 2013, 2014, 2015, 2016 Russ Allbery <rra@cpan.org>

Copyright 2012 Kurt Starsinic <kstarsinic@gmail.com>

This program is free software; you may redistribute it and/or modify it
under the same terms as Perl itself.

=head1 SEE ALSO

The CPAN module L<Term::ExtendedColor> provides a different and more
comprehensive interface for 256-color emulators that may be more
convenient.  The CPAN module L<Win32::Console::ANSI> provides ANSI color
(and other escape sequence) support in the Win32 Console environment.
The CPAN module L<Term::Chrome> provides a different interface using
objects and operator overloading.

ECMA-048 is available on-line (at least at the time of this writing) at
L<http://www.ecma-international.org/publications/standards/Ecma-048.htm>.

ISO 6429 is available from ISO for a charge; the author of this module
does not own a copy of it.  Since the source material for ISO 6429 was
ECMA-048 and the latter is available for free, there seems little reason
to obtain the ISO standard.

The 256-color control sequences are documented at
L<http://invisible-island.net/xterm/ctlseqs/ctlseqs.html> (search for
256-color).

The current version of this module is always available from its web site
at L<https://www.eyrie.org/~eagle/software/ansicolor/>.  It is also part
of the Perl core distribution as of 5.6.0.

=cut
PK�����Z�i\�Q���������Complete.pmnu��[�����������package Term::Complete;
require 5.000;
require Exporter;

use strict;
our @ISA = qw(Exporter);
our @EXPORT = qw(Complete);
our $VERSION = '1.403';

#      @(#)complete.pl,v1.2            (me@anywhere.EBay.Sun.COM) 09/23/91

=head1 NAME

Term::Complete - Perl word completion module

=head1 SYNOPSIS

    $input = Complete('prompt_string', \@completion_list);
    $input = Complete('prompt_string', @completion_list);

=head1 DESCRIPTION

This routine provides word completion on the list of words in
the array (or array ref).

The tty driver is put into raw mode and restored using an operating
system specific command, in UNIX-like environments C<stty>.

The following command characters are defined:

=over 4

=item E<lt>tabE<gt>

Attempts word completion.
Cannot be changed.

=item ^D

Prints completion list.
Defined by I<$Term::Complete::complete>.

=item ^U

Erases the current input.
Defined by I<$Term::Complete::kill>.

=item E<lt>delE<gt>, E<lt>bsE<gt>

Erases one character.
Defined by I<$Term::Complete::erase1> and I<$Term::Complete::erase2>.

=back

=head1 DIAGNOSTICS

Bell sounds when word completion fails.

=head1 BUGS

The completion character E<lt>tabE<gt> cannot be changed.

=head1 AUTHOR

Wayne Thompson

=cut

our($complete, $kill, $erase1, $erase2, $tty_raw_noecho, $tty_restore, $stty, $tty_safe_restore);
our($tty_saved_state) = '';
CONFIG: {
    $complete = "\004";
    $kill     = "\025";
    $erase1 =   "\177";
    $erase2 =   "\010";
    foreach my $s (qw(/bin/stty /usr/bin/stty)) {
	if (-x $s) {
	    $tty_raw_noecho = "$s raw -echo";
	    $tty_restore    = "$s -raw echo";
	    $tty_safe_restore = $tty_restore;
	    $stty = $s;
	    last;
	}
    }
}

sub Complete {
    my($prompt, @cmp_lst, $cmp, $test, $l, @match);
    my ($return, $r) = ("", 0);

    $return = "";
    $r      = 0;

    $prompt = shift;
    if (ref $_[0] || $_[0] =~ /^\*/) {
	@cmp_lst = sort @{$_[0]};
    }
    else {
	@cmp_lst = sort(@_);
    }

    # Attempt to save the current stty state, to be restored later
    if (defined $stty && defined $tty_saved_state && $tty_saved_state eq '') {
	$tty_saved_state = qx($stty -g 2>/dev/null);
	if ($?) {
	    # stty -g not supported
	    $tty_saved_state = undef;
	}
	else {
	    $tty_saved_state =~ s/\s+$//g;
	    $tty_restore = qq($stty "$tty_saved_state" 2>/dev/null);
	}
    }
    system $tty_raw_noecho if defined $tty_raw_noecho;
    LOOP: {
        local $_;
        print($prompt, $return);
        while (($_ = getc(STDIN)) ne "\r") {
            CASE: {
                # (TAB) attempt completion
                $_ eq "\t" && do {
                    @match = grep(/^\Q$return/, @cmp_lst);
                    unless ($#match < 0) {
                        $l = length($test = shift(@match));
                        foreach $cmp (@match) {
                            until (substr($cmp, 0, $l) eq substr($test, 0, $l)) {
                                $l--;
                            }
                        }
                        print("\a");
                        print($test = substr($test, $r, $l - $r));
                        $r = length($return .= $test);
                    }
                    last CASE;
                };

                # (^D) completion list
                $_ eq $complete && do {
                    print(join("\r\n", '', grep(/^\Q$return/, @cmp_lst)), "\r\n");
                    redo LOOP;
                };

                # (^U) kill
                $_ eq $kill && do {
                    if ($r) {
                        $r	= 0;
			$return	= "";
                        print("\r\n");
                        redo LOOP;
                    }
                    last CASE;
                };

                # (DEL) || (BS) erase
                ($_ eq $erase1 || $_ eq $erase2) && do {
                    if($r) {
                        print("\b \b");
                        chop($return);
                        $r--;
                    }
                    last CASE;
                };

                # printable char
                ord >= ord(" ") && do {
                    $return .= $_;
                    $r++;
                    print;
                    last CASE;
                };
            }
        }
    }

    # system $tty_restore if defined $tty_restore;
    if (defined $tty_saved_state && defined $tty_restore && defined $tty_safe_restore)
    {
	system $tty_restore;
	if ($?) {
	    # tty_restore caused error
	    system $tty_safe_restore;
	}
    }
    print("\n");
    $return;
}

1;
PK�����Z�i\L�ze�6���6����ReadLine.pmnu��[�����������=head1 NAME

Term::ReadLine - Perl interface to various C<readline> packages.
If no real package is found, substitutes stubs instead of basic functions.

=head1 SYNOPSIS

  use Term::ReadLine;
  my $term = Term::ReadLine->new('Simple Perl calc');
  my $prompt = "Enter your arithmetic expression: ";
  my $OUT = $term->OUT || \*STDOUT;
  while ( defined ($_ = $term->readline($prompt)) ) {
    my $res = eval($_);
    warn $@ if $@;
    print $OUT $res, "\n" unless $@;
    $term->addhistory($_) if /\S/;
  }

=head1 DESCRIPTION

This package is just a front end to some other packages. It's a stub to
set up a common interface to the various ReadLine implementations found on
CPAN (under the C<Term::ReadLine::*> namespace).

=head1 Minimal set of supported functions

All the supported functions should be called as methods, i.e., either as 

  $term = Term::ReadLine->new('name');

or as 

  $term->addhistory('row');

where $term is a return value of Term::ReadLine-E<gt>new().

=over 12

=item C<ReadLine>

returns the actual package that executes the commands. Among possible
values are C<Term::ReadLine::Gnu>, C<Term::ReadLine::Perl>,
C<Term::ReadLine::Stub>.

=item C<new>

returns the handle for subsequent calls to following
functions. Argument is the name of the application. Optionally can be
followed by two arguments for C<IN> and C<OUT> filehandles. These
arguments should be globs.

=item C<readline>

gets an input line, I<possibly> with actual C<readline>
support. Trailing newline is removed. Returns C<undef> on C<EOF>.

=item C<addhistory>

adds the line to the history of input, from where it can be used if
the actual C<readline> is present.

=item C<IN>, C<OUT>

return the filehandles for input and output or C<undef> if C<readline>
input and output cannot be used for Perl.

=item C<MinLine>

If argument is specified, it is an advice on minimal size of line to
be included into history.  C<undef> means do not include anything into
history. Returns the old value.

=item C<findConsole>

returns an array with two strings that give most appropriate names for
files for input and output using conventions C<"E<lt>$in">, C<"E<gt>out">.

The strings returned may not be useful for 3-argument open().

=item Attribs

returns a reference to a hash which describes internal configuration
of the package. Names of keys in this hash conform to standard
conventions with the leading C<rl_> stripped.

=item C<Features>

Returns a reference to a hash with keys being features present in
current implementation. Several optional features are used in the
minimal interface: C<appname> should be present if the first argument
to C<new> is recognized, and C<minline> should be present if
C<MinLine> method is not dummy.  C<autohistory> should be present if
lines are put into history automatically (maybe subject to
C<MinLine>), and C<addhistory> if C<addhistory> method is not dummy.

If C<Features> method reports a feature C<attribs> as present, the
method C<Attribs> is not dummy.

=back

=head1 Additional supported functions

Actually C<Term::ReadLine> can use some other package, that will
support a richer set of commands.

All these commands are callable via method interface and have names
which conform to standard conventions with the leading C<rl_> stripped.

The stub package included with the perl distribution allows some
additional methods: 

=over 12

=item C<tkRunning>

makes Tk event loop run when waiting for user input (i.e., during
C<readline> method).

=item C<event_loop>

Registers call-backs to wait for user input (i.e., during C<readline>
method).  This supersedes tkRunning.

The first call-back registered is the call back for waiting.  It is
expected that the callback will call the current event loop until
there is something waiting to get on the input filehandle.  The parameter
passed in is the return value of the second call back.

The second call-back registered is the call back for registration.  The
input filehandle (often STDIN, but not necessarily) will be passed in.

For example, with AnyEvent:

  $term->event_loop(sub {
    my $data = shift;
    $data->[1] = AE::cv();
    $data->[1]->recv();
  }, sub {
    my $fh = shift;
    my $data = [];
    $data->[0] = AE::io($fh, 0, sub { $data->[1]->send() });
    $data;
  });

The second call-back is optional if the call back is registered prior to
the call to $term-E<gt>readline.

Deregistration is done in this case by calling event_loop with C<undef>
as its parameter:

    $term->event_loop(undef);

This will cause the data array ref to be removed, allowing normal garbage
collection to clean it up.  With AnyEvent, that will cause $data->[0] to
be cleaned up, and AnyEvent will automatically cancel the watcher at that
time.  If another loop requires more than that to clean up a file watcher,
that will be up to the caller to handle.

=item C<ornaments>

makes the command line stand out by using termcap data.  The argument
to C<ornaments> should be 0, 1, or a string of a form
C<"aa,bb,cc,dd">.  Four components of this string should be names of
I<terminal capacities>, first two will be issued to make the prompt
standout, last two to make the input line standout.

=item C<newTTY>

takes two arguments which are input filehandle and output filehandle.
Switches to use these filehandles.

=back

One can check whether the currently loaded ReadLine package supports
these methods by checking for corresponding C<Features>.

=head1 EXPORTS

None

=head1 ENVIRONMENT

The environment variable C<PERL_RL> governs which ReadLine clone is
loaded. If the value is false, a dummy interface is used. If the value
is true, it should be tail of the name of the package to use, such as
C<Perl> or C<Gnu>.  

As a special case, if the value of this variable is space-separated,
the tail might be used to disable the ornaments by setting the tail to
be C<o=0> or C<ornaments=0>.  The head should be as described above, say

If the variable is not set, or if the head of space-separated list is
empty, the best available package is loaded.

  export "PERL_RL=Perl o=0" # Use Perl ReadLine sans ornaments
  export "PERL_RL= o=0"     # Use best available ReadLine sans ornaments

(Note that processing of C<PERL_RL> for ornaments is in the discretion of the 
particular used C<Term::ReadLine::*> package).

=cut

use strict;

package Term::ReadLine::Stub;
our @ISA = qw'Term::ReadLine::Tk Term::ReadLine::TermCap';

$DB::emacs = $DB::emacs;	# To pacify -w
our @rl_term_set;
*rl_term_set = \@Term::ReadLine::TermCap::rl_term_set;

sub PERL_UNICODE_STDIN () { 0x0001 }

sub ReadLine {'Term::ReadLine::Stub'}
sub readline {
  my $self = shift;
  my ($in,$out,$str) = @$self;
  my $prompt = shift;
  print $out $rl_term_set[0], $prompt, $rl_term_set[1], $rl_term_set[2]; 
  $self->register_Tk 
     if not $Term::ReadLine::registered and $Term::ReadLine::toloop;
  #$str = scalar <$in>;
  $str = $self->get_line;
  utf8::upgrade($str)
      if (${^UNICODE} & PERL_UNICODE_STDIN || defined ${^ENCODING}) &&
         utf8::valid($str);
  print $out $rl_term_set[3]; 
  # bug in 5.000: chomping empty string creates length -1:
  chomp $str if defined $str;
  $str;
}
sub addhistory {}

# used for testing purpose
sub devtty { return '/dev/tty' }

sub findConsole {
    my $console;
    my $consoleOUT;

    my $devtty = devtty();

    if ($^O ne 'MSWin32' and -e $devtty) {
	$console = $devtty;
    } elsif ($^O eq 'MSWin32' or $^O eq 'msys' or -e "con") {
       $console = 'CONIN$';
       $consoleOUT = 'CONOUT$';
    } elsif ($^O eq 'VMS') {
	$console = "sys\$command";
    } elsif ($^O eq 'os2' && !$DB::emacs) {
	$console = "/dev/con";
    } else {
	$console = undef;
    }

    $consoleOUT = $console unless defined $consoleOUT;
    $console = "&STDIN" unless defined $console;
    if ($console eq $devtty && !open(my $fh, "<", $console)) {
      $console = "&STDIN";
      undef($consoleOUT);
    }
    if (!defined $consoleOUT) {
      $consoleOUT = defined fileno(STDERR) && $^O ne 'MSWin32' ? "&STDERR" : "&STDOUT";
    }
    ($console,$consoleOUT);
}

sub new {
  die "method new called with wrong number of arguments" 
    unless @_==2 or @_==4;
  #local (*FIN, *FOUT);
  my ($FIN, $FOUT, $ret);
  if (@_==2) {
    my($console, $consoleOUT) = $_[0]->findConsole;

    # the Windows CONIN$ needs GENERIC_WRITE mode to allow
    # a SetConsoleMode() if we end up using Term::ReadKey
    open FIN, (( $^O eq 'MSWin32' && $console eq 'CONIN$' ) ? '+<' : '<' ), $console;
    # RT #132008:  Still need 2-arg open here
    open FOUT,">$consoleOUT";

    #OUT->autoflush(1);		# Conflicts with debugger?
    my $sel = select(FOUT);
    $| = 1;				# for DB::OUT
    select($sel);
    $ret = bless [\*FIN, \*FOUT];
  } else {			# Filehandles supplied
    $FIN = $_[2]; $FOUT = $_[3];
    #OUT->autoflush(1);		# Conflicts with debugger?
    my $sel = select($FOUT);
    $| = 1;				# for DB::OUT
    select($sel);
    $ret = bless [$FIN, $FOUT];
  }
  if ($ret->Features->{ornaments} 
      and not ($ENV{PERL_RL} and $ENV{PERL_RL} =~ /\bo\w*=0/)) {
    local $Term::ReadLine::termcap_nowarn = 1;
    $ret->ornaments(1);
  }
  return $ret;
}

sub newTTY {
  my ($self, $in, $out) = @_;
  $self->[0] = $in;
  $self->[1] = $out;
  my $sel = select($out);
  $| = 1;				# for DB::OUT
  select($sel);
}

sub IN { shift->[0] }
sub OUT { shift->[1] }
sub MinLine { undef }
sub Attribs { {} }

my %features = (tkRunning => 1, ornaments => 1, 'newTTY' => 1);
sub Features { \%features }

#sub get_line {
#  my $self = shift;
#  my $in = $self->IN;
#  local ($/) = "\n";
#  return scalar <$in>;
#}

package Term::ReadLine;		# So late to allow the above code be defined?

our $VERSION = '1.17';

my ($which) = exists $ENV{PERL_RL} ? split /\s+/, $ENV{PERL_RL} : undef;
if ($which) {
  if ($which =~ /\bgnu\b/i){
    eval "use Term::ReadLine::Gnu;";
  } elsif ($which =~ /\bperl\b/i) {
    eval "use Term::ReadLine::Perl;";
  } elsif ($which =~ /^(Stub|TermCap|Tk)$/) {
    # it is already in memory to avoid false exception as seen in:
    # PERL_RL=Stub perl -e'$SIG{__DIE__} = sub { print @_ }; require Term::ReadLine'
  } else {
    eval "use Term::ReadLine::$which;";
  }
} elsif (defined $which and $which ne '') {	# Defined but false
  # Do nothing fancy
} else {
  eval "use Term::ReadLine::Gnu; 1" or eval "use Term::ReadLine::EditLine; 1" or eval "use Term::ReadLine::Perl; 1";
}

#require FileHandle;

# To make possible switch off RL in debugger: (Not needed, work done
# in debugger).
our @ISA;
if (defined &Term::ReadLine::Gnu::readline) {
  @ISA = qw(Term::ReadLine::Gnu Term::ReadLine::Stub);
} elsif (defined &Term::ReadLine::EditLine::readline) {
  @ISA = qw(Term::ReadLine::EditLine Term::ReadLine::Stub);
} elsif (defined &Term::ReadLine::Perl::readline) {
  @ISA = qw(Term::ReadLine::Perl Term::ReadLine::Stub);
} elsif (defined $which && defined &{"Term::ReadLine::$which\::readline"}) {
  @ISA = "Term::ReadLine::$which";
} else {
  @ISA = qw(Term::ReadLine::Stub);
}

package Term::ReadLine::TermCap;

# Prompt-start, prompt-end, command-line-start, command-line-end
#     -- zero-width beautifies to emit around prompt and the command line.
our @rl_term_set = ("","","","");
# string encoded:
our $rl_term_set = ',,,';

our $terminal;
sub LoadTermCap {
  return if defined $terminal;
  
  require Term::Cap;
  $terminal = Tgetent Term::Cap ({OSPEED => 9600}); # Avoid warning.
}

sub ornaments {
  shift;
  return $rl_term_set unless @_;
  $rl_term_set = shift;
  $rl_term_set ||= ',,,';
  $rl_term_set = 'us,ue,md,me' if $rl_term_set eq '1';
  my @ts = split /,/, $rl_term_set, 4;
  eval { LoadTermCap };
  unless (defined $terminal) {
    warn("Cannot find termcap: $@\n") unless $Term::ReadLine::termcap_nowarn;
    $rl_term_set = ',,,';
    return;
  }
  @rl_term_set = map {$_ ? $terminal->Tputs($_,1) || '' : ''} @ts;
  return $rl_term_set;
}


package Term::ReadLine::Tk;

# This package inserts a Tk->fileevent() before the diamond operator.
# The Tk watcher dispatches Tk events until the filehandle returned by
# the$term->IN() accessor becomes ready for reading.  It's assumed
# that the diamond operator will return a line of input immediately at
# that point.

my ($giveup);

# maybe in the future the Tk-specific aspects will be removed.
sub Tk_loop{
    if (ref $Term::ReadLine::toloop)
    {
        $Term::ReadLine::toloop->[0]->($Term::ReadLine::toloop->[2]);
    }
    else
    {
        Tk::DoOneEvent(0) until $giveup;
        $giveup = 0;
    }
};

sub register_Tk {
    my $self = shift;
    unless ($Term::ReadLine::registered++)
    {
        if (ref $Term::ReadLine::toloop)
        {
            $Term::ReadLine::toloop->[2] = $Term::ReadLine::toloop->[1]->($self->IN) if $Term::ReadLine::toloop->[1];
        }
        else
        {
            Tk->fileevent($self->IN,'readable',sub { $giveup = 1});
        }
    }
};

sub tkRunning {
  $Term::ReadLine::toloop = $_[1] if @_ > 1;
  $Term::ReadLine::toloop;
}

sub event_loop {
    shift;

    # T::RL::Gnu and T::RL::Perl check that this exists, if not,
    # it doesn't call the loop.  Those modules will need to be
    # fixed before this can be removed.
    if (not defined &Tk::DoOneEvent)
    {
        *Tk::DoOneEvent = sub {
            die "what?"; # this shouldn't be called.
        }
    }

    # store the callback in toloop, again so that other modules will
    # recognise it and call us for the loop.
    $Term::ReadLine::toloop = [ @_ ] if @_ > 0; # 0 because we shifted off $self.
    $Term::ReadLine::toloop;
}

sub PERL_UNICODE_STDIN () { 0x0001 }

sub get_line {
  my $self = shift;
  my ($in,$out,$str) = @$self;

  if ($Term::ReadLine::toloop) {
    $self->register_Tk if not $Term::ReadLine::registered;
    $self->Tk_loop;
  }

  local ($/) = "\n";
  $str = <$in>;

  utf8::upgrade($str)
      if (${^UNICODE} & PERL_UNICODE_STDIN || defined ${^ENCODING}) &&
         utf8::valid($str);
  print $out $rl_term_set[3];
  # bug in 5.000: chomping empty string creates length -1:
  chomp $str if defined $str;

  $str;
}

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