cap.pm

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        if ( defined $field && $field =~ /^(\w\w)$/ )
        {
            $self->{ '_' . $field } = 1 unless defined $self->{ '_' . $1 };

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

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

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

            # 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 me 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 ( $tmp[$[] > $code )
            {
                $tmp[$[] += $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

Please see the README file in distribution.

=head1 AUTHOR

This module is part of the core Perl distribution and is also maintained
for CPAN by Jonathan Stowe <[e-mail]>.

=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: