[p5sagit/p5-mst-13.2.git] / lib / Term / Cap.pm

package Term::Cap;
use Carp;

our $VERSION = '1.01';

# Version undef: Thu Dec 14 20:02:42 CST 1995 by sanders@bsdi.com
# Version 1.00:  Thu Nov 30 23:34:29 EST 2000 by schwern@pobox.com
#	[PATCH] $VERSION crusade, strict, tests, etc... all over lib/
# Version 1.01:  Wed May 23 00:00:00 CST 2001 by d-lewart@uiuc.edu
#	Avoid warnings in Tgetent and Tputs

# TODO:
# support Berkeley DB termcaps
# should probably be a .xs module
# 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.

The B<Tgetent> 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.

I<OSPEED> is the terminal output bit rate (often mistakenly called
the baud rate).  I<OSPEED> can be specified as either a POSIX
termios/SYSV termio speeds (where 9600 equals 9600) or an old
BSD-style speeds (where 13 equals 9600).

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>.  It calls C<croak> on failure.

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

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.

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

=head1 EXAMPLES

    # 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);

=cut

# 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,
	    $ENV{'HOME'} . '/.termcap',
	    '/etc/termcap',
	    '/usr/share/misc/termcap',
	);
    }
    # return the list of those termcaps that exist
    grep(-f, @termcap_path);
}

sub Tgetent { ## public -- static method
    my $class = shift;
    my $self = bless shift, $class;
    my($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}) {
	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};
    }

    $self->{TERM} = ($self->{TERM} || $ENV{TERM} || 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;

    unless (@termcap_path || $entry)
    {
	# last resort--fake up a termcap from terminfo 
	local $ENV{TERM} = $term;
	$entry = `infocmp -C 2>/dev/null`;
    }

    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 ($field =~ /^(\w\w)$/) {
	    $self->{'_' . $field} = 1 unless defined $self->{'_' . $1};
	    # print STDERR "DEBUG: flag $1\n";
	}
	elsif ($field =~ /^(\w\w)\@/) {
	    $self->{'_' . $1} = "";
	    # print STDERR "DEBUG: unset $1\n";
	}
	elsif ($field =~ /^(\w\w)#(.*)/) {
	    $self->{'_' . $1} = $2 unless defined $self->{'_' . $1};
	    # print STDERR "DEBUG: numeric $1 = $2\n";
	}
	elsif ($field =~ /^(\w\w)=(.*)/) {
	    # print STDERR "DEBUG: string $1 = $2\n";
	    next if defined $self->{'_' . ($cap = $1)};
	    $_ = $2;
	    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);
sub Tpad { ## public
    my $self = shift;
    my($string, $cnt, $FH) = @_;
    my($decr, $ms);

    if ($string =~ /(^[\d.]+)(\*?)(.*)$/) {
	$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);
sub Tputs { ## public
    my $self = shift;
    my($cap, $cnt, $FH) = @_;
    my $string;

    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;
}

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

1;
Commit	Line	Data
a0d0e21e	1	package Term::Cap;
cb1a09d0	2	use Carp;
85e6fe83	3
e14c93b3	4	our $VERSION = '1.01';
b75c8c73	5
e14c93b3	6	# Version undef: Thu Dec 14 20:02:42 CST 1995 by sanders@bsdi.com
	7	# Version 1.00: Thu Nov 30 23:34:29 EST 2000 by schwern@pobox.com
	8	# [PATCH] $VERSION crusade, strict, tests, etc... all over lib/
	9	# Version 1.01: Wed May 23 00:00:00 CST 2001 by d-lewart@uiuc.edu
	10	# Avoid warnings in Tgetent and Tputs
a687059c	11
cb1a09d0	12	# TODO:
	13	# support Berkeley DB termcaps
	14	# should probably be a .xs module
	15	# force $FH into callers package?
	16	# keep $FH in object at Tgetent time?
	17
	18	=head1 NAME
	19
	20	Term::Cap - Perl termcap interface
	21
	22	=head1 SYNOPSIS
	23
	24	require Term::Cap;
	25	$terminal = Tgetent Term::Cap { TERM => undef, OSPEED => $ospeed };
	26	$terminal->Trequire(qw/ce ku kd/);
	27	$terminal->Tgoto('cm', $col, $row, $FH);
	28	$terminal->Tputs('dl', $count, $FH);
	29	$terminal->Tpad($string, $count, $FH);
	30
	31	=head1 DESCRIPTION
	32
	33	These are low-level functions to extract and use capabilities from
	34	a terminal capability (termcap) database.
	35
	36	The B<Tgetent> function extracts the entry of the specified terminal
	37	type I<TERM> (defaults to the environment variable I<TERM>) from the
	38	database.
	39
	40	It will look in the environment for a I<TERMCAP> variable. If
	41	found, and the value does not begin with a slash, and the terminal
	42	type name is the same as the environment string I<TERM>, the
	43	I<TERMCAP> string is used instead of reading a termcap file. If
	44	it does begin with a slash, the string is used as a path name of
	45	the termcap file to search. If I<TERMCAP> does not begin with a
	46	slash and name is different from I<TERM>, B<Tgetent> searches the
	47	files F<$HOME/.termcap>, F</etc/termcap>, and F</usr/share/misc/termcap>,
	48	in that order, unless the environment variable I<TERMPATH> exists,
	49	in which case it specifies a list of file pathnames (separated by
	50	spaces or colons) to be searched B<instead>. Whenever multiple
	51	files are searched and a tc field occurs in the requested entry,
	52	the entry it names must be found in the same file or one of the
	53	succeeding files. If there is a C<:tc=...:> in the I<TERMCAP>
	54	environment variable string it will continue the search in the
	55	files as above.
	56
	57	I<OSPEED> is the terminal output bit rate (often mistakenly called
	58	the baud rate). I<OSPEED> can be specified as either a POSIX
	59	termios/SYSV termio speeds (where 9600 equals 9600) or an old
	60	BSD-style speeds (where 13 equals 9600).
	61
	62	B<Tgetent> returns a blessed object reference which the user can
	63	then use to send the control strings to the terminal using B<Tputs>
	64	and B<Tgoto>. It calls C<croak> on failure.
	65
	66	B<Tgoto> decodes a cursor addressing string with the given parameters.
	67
	68	The output strings for B<Tputs> are cached for counts of 1 for performance.
	69	B<Tgoto> and B<Tpad> do not cache. C<$self-E<gt>{_xx}> is the raw termcap
	70	data and C<$self-E<gt>{xx}> is the cached version.
	71
	72	print $terminal->Tpad($self->{_xx}, 1);
	73
	74	B<Tgoto>, B<Tputs>, and B<Tpad> return the string and will also
	75	output the string to $FH if specified.
76
77	The extracted termcap entry is available in the object
78	as C<$self-E<gt>{TERMCAP}>.
79
80	=head1 EXAMPLES
81
82	# Get terminal output speed
83	require POSIX;
84	my $termios = new POSIX::Termios;
85	$termios->getattr;
86	my $ospeed = $termios->getospeed;
87
88	# Old-style ioctl code to get ospeed:
89	# require 'ioctl.pl';
90	# ioctl(TTY,$TIOCGETP,$sgtty);
91	# ($ispeed,$ospeed) = unpack('cc',$sgtty);
92
93	# allocate and initialize a terminal structure
94	$terminal = Tgetent Term::Cap { TERM => undef, OSPEED => $ospeed };
95
96	# require certain capabilities to be available
97	$terminal->Trequire(qw/ce ku kd/);
98
99	# Output Routines, if $FH is undefined these just return the string
100
101	# Tgoto does the % expansion stuff with the given args
102	$terminal->Tgoto('cm', $col, $row, $FH);
103
104	# Tputs doesn't do any % expansion.
105	$terminal->Tputs('dl', $count = 1, $FH);
106
107	=cut
108
109	# Returns a list of termcap files to check.
110	sub termcap_path { ## private
111	my @termcap_path;
112	# $TERMCAP, if it's a filespec
7a2e2cd6	113	push(@termcap_path, $ENV{TERMCAP})
7a2e2cd6	114	if ((exists $ENV{TERMCAP}) &&
39e571d4	115	(($^O eq 'os2' \|\| $^O eq 'MSWin32' \|\| $^O eq 'dos')
fe6f1558	116	? $ENV{TERMCAP} =~ /^[a-z]:[\\\/]/is
fe6f1558	117	: $ENV{TERMCAP} =~ /^\//s));
c07a80fd	118	if ((exists $ENV{TERMPATH}) && ($ENV{TERMPATH})) {
cb1a09d0	119	# Add the users $TERMPATH
	120	push(@termcap_path, split(/(:\|\s+)/, $ENV{TERMPATH}))
	121	}
	122	else {
	123	# Defaults
	124	push(@termcap_path,
	125	$ENV{'HOME'} . '/.termcap',
	126	'/etc/termcap',
	127	'/usr/share/misc/termcap',
	128	);
a687059c	129	}
cb1a09d0	130	# return the list of those termcaps that exist
748a9306	131	grep(-f, @termcap_path);
	132	}
	133
cb1a09d0	134	sub Tgetent { ## public -- static method
	135	my $class = shift;
	136	my $self = bless shift, $class;
	137	my($term,$cap,$search,$field,$max,$tmp_term,$TERMCAP);
	138	local($termpat,$state,$first,$entry); # used inside eval
	139	local $_;
	140
	141	# Compute PADDING factor from OSPEED (to be used by Tpad)
	142	if (! $self->{OSPEED}) {
	143	carp "OSPEED was not set, defaulting to 9600";
	144	$self->{OSPEED} = 9600;
	145	}
	146	if ($self->{OSPEED} < 16) {
	147	# delays for old style speeds
	148	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);
	149	$self->{PADDING} = $pad[$self->{OSPEED}];
	150	}
	151	else {
	152	$self->{PADDING} = 10000 / $self->{OSPEED};
	153	}
	154
	155	$self->{TERM} = ($self->{TERM} \|\| $ENV{TERM} \|\| croak "TERM not set");
	156	$term = $self->{TERM}; # $term is the term type we are looking for
	157
	158	# $tmp_term is always the next term (possibly :tc=...:) we are looking for
	159	$tmp_term = $self->{TERM};
	160	# protect any pattern metacharacters in $tmp_term
	161	$termpat = $tmp_term; $termpat =~ s/(\W)/\\$1/g;
	162
c07a80fd	163	my $foo = (exists $ENV{TERMCAP} ? $ENV{TERMCAP} : '');
cb1a09d0	164
cb1a09d0	165	# $entry is the extracted termcap entry
fe6f1558	166	if (($foo !~ m:^/:s) && ($foo =~ m/(^\|\\|)${termpat}[:\|]/s)) {
cb1a09d0	167	$entry = $foo;
	168	}
	169
	170	my @termcap_path = termcap_path;
e66fb0c2	171
	172	unless (@termcap_path \|\| $entry)
	173	{
	174	# last resort--fake up a termcap from terminfo
	175	local $ENV{TERM} = $term;
	176	$entry = `infocmp -C 2>/dev/null`;
	177	}
	178
cb1a09d0	179	croak "Can't find a valid termcap file" unless @termcap_path \|\| $entry;
	180
	181	$state = 1; # 0 == finished
	182	# 1 == next file
	183	# 2 == search again
	184
	185	$first = 0; # first entry (keeps term name)
	186
	187	$max = 32; # max :tc=...:'s
	188
	189	if ($entry) {
	190	# ok, we're starting with $TERMCAP
	191	$first++; # we're the first entry
	192	# do we need to continue?
	193	if ($entry =~ s/:tc=([^:]+):/:/) {
	194	$tmp_term = $1;
	195	# protect any pattern metacharacters in $tmp_term
	196	$termpat = $tmp_term; $termpat =~ s/(\W)/\\$1/g;
	197	}
	198	else {
	199	$state = 0; # we're already finished
	200	}
	201	}
	202
	203	# This is eval'ed inside the while loop for each file
	204	$search = q{
54310121	205	while (<TERMCAP>) {
cb1a09d0	206	next if /^\\t/ \|\| /^#/;
	207	if ($_ =~ m/(^\|\\\|)${termpat}[:\|]/o) {
	208	chomp;
	209	s/^[^:]*:// if $first++;
	210	$state = 0;
54310121	211	while ($_ =~ s/\\\\$//) {
	212	defined(my $x = <TERMCAP>) or last;
	213	$_ .= $x; chomp;
	214	}
cb1a09d0	215	last;
748a9306	216	}
cb1a09d0	217	}
55497cff	218	defined $entry or $entry = '';
e14c93b3	219	$entry .= $_ if $_;
cb1a09d0	220	};
748a9306	221
cb1a09d0	222	while ($state != 0) {
	223	if ($state == 1) {
	224	# get the next TERMCAP
	225	$TERMCAP = shift @termcap_path
	226	\|\| croak "failed termcap lookup on $tmp_term";
	227	}
	228	else {
	229	# do the same file again
	230	# prevent endless recursion
	231	$max-- \|\| croak "failed termcap loop at $tmp_term";
	232	$state = 1; # ok, maybe do a new file next time
	233	}
	234
	235	open(TERMCAP,"< $TERMCAP\0") \|\| croak "open $TERMCAP: $!";
	236	eval $search;
	237	die $@ if $@;
	238	close TERMCAP;
	239
	240	# If :tc=...: found then search this file again
	241	$entry =~ s/:tc=([^:]+):/:/ && ($tmp_term = $1, $state = 2);
	242	# protect any pattern metacharacters in $tmp_term
	243	$termpat = $tmp_term; $termpat =~ s/(\W)/\\$1/g;
a687059c	244	}
cb1a09d0	245
	246	croak "Can't find $term" if $entry eq '';
	247	$entry =~ s/:+\s*:+/:/g; # cleanup $entry
	248	$entry =~ s/:+/:/g; # cleanup $entry
	249	$self->{TERMCAP} = $entry; # save it
	250	# print STDERR "DEBUG: $entry = ", $entry, "\n";
a687059c	251
748a9306	252	# Precompile $entry into the object
cb1a09d0	253	$entry =~ s/^[^:]*://;
748a9306	254	foreach $field (split(/:[\s:\\]*/,$entry)) {
cb1a09d0	255	if ($field =~ /^(\w\w)$/) {
	256	$self->{'_' . $field} = 1 unless defined $self->{'_' . $1};
	257	# print STDERR "DEBUG: flag $1\n";
748a9306	258	}
748a9306	259	elsif ($field =~ /^(\w\w)\@/) {
cb1a09d0	260	$self->{'_' . $1} = "";
cb1a09d0	261	# print STDERR "DEBUG: unset $1\n";
a687059c	262	}
a687059c	263	elsif ($field =~ /^(\w\w)#(.*)/) {
cb1a09d0	264	$self->{'_' . $1} = $2 unless defined $self->{'_' . $1};
cb1a09d0	265	# print STDERR "DEBUG: numeric $1 = $2\n";
a687059c	266	}
a687059c	267	elsif ($field =~ /^(\w\w)=(.*)/) {
cb1a09d0	268	# print STDERR "DEBUG: string $1 = $2\n";
cb1a09d0	269	next if defined $self->{'_' . ($cap = $1)};
a687059c	270	$_ = $2;
a687059c	271	s/\\E/\033/g;
ecfc5424	272	s/\\(\d\d\d)/pack('c',oct($1) & 0177)/eg;
a687059c	273	s/\\n/\n/g;
	274	s/\\r/\r/g;
	275	s/\\t/\t/g;
	276	s/\\b/\b/g;
	277	s/\\f/\f/g;
	278	s/\\\^/\377/g;
	279	s/\^\?/\177/g;
63f2c1e1	280	s/\^(.)/pack('c',ord($1) & 31)/eg;
a687059c	281	s/\\(.)/$1/g;
a687059c	282	s/\377/^/g;
cb1a09d0	283	$self->{'_' . $cap} = $_;
a687059c	284	}
cb1a09d0	285	# else { carp "junk in $term ignored: $field"; }
a687059c	286	}
cb1a09d0	287	$self->{'_pc'} = "\0" unless defined $self->{'_pc'};
	288	$self->{'_bc'} = "\b" unless defined $self->{'_bc'};
	289	$self;
a687059c	290	}
a687059c	291
cb1a09d0	292	# $terminal->Tpad($string, $cnt, $FH);
	293	sub Tpad { ## public
	294	my $self = shift;
	295	my($string, $cnt, $FH) = @_;
	296	my($decr, $ms);
a687059c	297
a687059c	298	if ($string =~ /(^[\d.]+)(\?)(.)$/) {
a687059c	299	$ms = $1;
748a9306	300	$ms *= $cnt if $2;
a687059c	301	$string = $3;
cb1a09d0	302	$decr = $self->{PADDING};
a687059c	303	if ($decr > .1) {
a687059c	304	$ms += $decr / 2;
cb1a09d0	305	$string .= $self->{'_pc'} x ($ms / $decr);
a687059c	306	}
	307	}
	308	print $FH $string if $FH;
	309	$string;
	310	}
	311
cb1a09d0	312	# $terminal->Tputs($cap, $cnt, $FH);
	313	sub Tputs { ## public
	314	my $self = shift;
	315	my($cap, $cnt, $FH) = @_;
	316	my $string;
748a9306	317
748a9306	318	if ($cnt > 1) {
cb1a09d0	319	$string = Tpad($self, $self->{'_' . $cap}, $cnt);
748a9306	320	} else {
cb1a09d0	321	# cache result because Tpad can be slow
e14c93b3	322	unless (exists $self->{$cap}) {
	323	$self->{$cap} = exists $self->{"_$cap"} ?
	324	Tpad($self, $self->{"_$cap"}, 1) : undef;
	325	}
	326	$string = $self->{$cap};
748a9306	327	}
	328	print $FH $string if $FH;
	329	$string;
	330	}
	331
	332	# %% output `%'
	333	# %d output value as in printf %d
	334	# %2 output value as in printf %2d
	335	# %3 output value as in printf %3d
	336	# %. output value as in printf %c
	337	# %+x add x to value, then do %.
	338	#
	339	# %>xy if value > x then add y, no output
	340	# %r reverse order of two parameters, no output
	341	# %i increment by one, no output
	342	# %B BCD (16*(value/10)) + (value%10), no output
	343	#
	344	# %n exclusive-or all parameters with 0140 (Datamedia 2500)
	345	# %D Reverse coding (value - 2*(value%16)), no output (Delta Data)
	346	#
cb1a09d0	347	# $terminal->Tgoto($cap, $col, $row, $FH);
	348	sub Tgoto { ## public
	349	my $self = shift;
	350	my($cap, $code, $tmp, $FH) = @_;
	351	my $string = $self->{'_' . $cap};
	352	my $result = '';
	353	my $after = '';
	354	my $online = 0;
	355	my @tmp = ($tmp,$code);
	356	my $cnt = $code;
748a9306	357
a687059c	358	while ($string =~ /^([^%])%(.)(.)/) {
	359	$result .= $1;
	360	$code = $2;
	361	$string = $3;
	362	if ($code eq 'd') {
9f68db38	363	$result .= sprintf("%d",shift(@tmp));
a687059c	364	}
a687059c	365	elsif ($code eq '.') {
9f68db38	366	$tmp = shift(@tmp);
a687059c	367	if ($tmp == 0 \|\| $tmp == 4 \|\| $tmp == 10) {
a687059c	368	if ($online) {
cb1a09d0	369	++$tmp, $after .= $self->{'_up'} if $self->{'_up'};
a687059c	370	}
a687059c	371	else {
cb1a09d0	372	++$tmp, $after .= $self->{'_bc'};
a687059c	373	}
	374	}
	375	$result .= sprintf("%c",$tmp);
	376	$online = !$online;
	377	}
	378	elsif ($code eq '+') {
9f68db38	379	$result .= sprintf("%c",shift(@tmp)+ord($string));
a687059c	380	$string = substr($string,1,99);
	381	$online = !$online;
	382	}
	383	elsif ($code eq 'r') {
9f68db38	384	($code,$tmp) = @tmp;
9f68db38	385	@tmp = ($tmp,$code);
a687059c	386	$online = !$online;
	387	}
	388	elsif ($code eq '>') {
	389	($code,$tmp,$string) = unpack("CCa99",$string);
9f68db38	390	if ($tmp[$[] > $code) {
9f68db38	391	$tmp[$[] += $tmp;
a687059c	392	}
	393	}
	394	elsif ($code eq '2') {
9f68db38	395	$result .= sprintf("%02d",shift(@tmp));
a687059c	396	$online = !$online;
	397	}
	398	elsif ($code eq '3') {
9f68db38	399	$result .= sprintf("%03d",shift(@tmp));
a687059c	400	$online = !$online;
	401	}
	402	elsif ($code eq 'i') {
9f68db38	403	($code,$tmp) = @tmp;
9f68db38	404	@tmp = ($code+1,$tmp+1);
a687059c	405	}
	406	else {
	407	return "OOPS";
	408	}
	409	}
cb1a09d0	410	$string = Tpad($self, $result . $string . $after, $cnt);
748a9306	411	print $FH $string if $FH;
	412	$string;
	413	}
	414
cb1a09d0	415	# $terminal->Trequire(qw/ce ku kd/);
	416	sub Trequire { ## public
	417	my $self = shift;
	418	my($cap,@undefined);
	419	foreach $cap (@_) {
	420	push(@undefined, $cap)
	421	unless defined $self->{'_' . $cap} && $self->{'_' . $cap};
748a9306	422	}
cb1a09d0	423	croak "Terminal does not support: (@undefined)" if @undefined;
a687059c	424	}
	425
	426	1;
cb1a09d0	427