source: trunk/essentials/dev-lang/perl/lib/termcap.pl@ 3184

;# $RCSfile: termcap.pl,v $$Revision: 4.1 $$Date: 92/08/07 18:24:16 $
#
# This library is no longer being maintained, and is included for backward
# compatibility with Perl 4 programs which may require it.
#
# In particular, this should not be used as an example of modern Perl
# programming techniques.
#
# Suggested alternative: Term::Cap
#
;#
;# Usage:
;#      require 'ioctl.pl';
;#      ioctl(TTY,$TIOCGETP,$foo);
;#      ($ispeed,$ospeed) = unpack('cc',$foo);
;#      require 'termcap.pl';
;#      &Tgetent('vt100');      # sets $TC{'cm'}, etc.
;#      &Tputs(&Tgoto($TC{'cm'},$col,$row), 0, 'FILEHANDLE');
;#      &Tputs($TC{'dl'},$affcnt,'FILEHANDLE');
;#
sub Tgetent {
    local($TERM) = @_;
    local($TERMCAP,$_,$entry,$loop,$field);

    # warn "Tgetent: no ospeed set" unless $ospeed;
    foreach $key (keys %TC) {
        delete $TC{$key};
    }
    $TERM = $ENV{'TERM'} unless $TERM;
    $TERM =~ s/(\W)/\\$1/g;
    $TERMCAP = $ENV{'TERMCAP'};
    $TERMCAP = '/etc/termcap' unless $TERMCAP;
    if ($TERMCAP !~ m:^/:) {
        if ($TERMCAP !~ /(^|\|)$TERM[:\|]/) {
            $TERMCAP = '/etc/termcap';
        }
    }
    if ($TERMCAP =~ m:^/:) {
        $entry = '';
        do {
            $loop = "
            open(TERMCAP,'<$TERMCAP') || die \"Can't open $TERMCAP\";
            while (<TERMCAP>) {
                next if /^#/;
                next if /^\t/;
                if (/(^|\\|)${TERM}[:\\|]/) {
                    chop;
                    while (chop eq '\\\\') {
                        \$_ .= <TERMCAP>;
                        chop;
                    }
                    \$_ .= ':';
                    last;
                }
            }
            close TERMCAP;
            \$entry .= \$_;
            ";
            eval $loop;
        } while s/:tc=([^:]+):/:/ && ($TERM = $1);
        $TERMCAP = $entry;
    }

    foreach $field (split(/:[\s:\\]*/,$TERMCAP)) {
        if ($field =~ /^\w\w$/) {
            $TC{$field} = 1;
        }
        elsif ($field =~ /^(\w\w)#(.*)/) {
            $TC{$1} = $2 if $TC{$1} eq '';
        }
        elsif ($field =~ /^(\w\w)=(.*)/) {
            $entry = $1;
            $_ = $2;
            s/\\E/\033/g;
            s/\\(200)/pack('c',0)/eg;                   # NUL character
            s/\\(0\d\d)/pack('c',oct($1))/eg;   # octal
            s/\\(0x[0-9A-Fa-f][0-9A-Fa-f])/pack('c',hex($1))/eg;        # hex
            s/\\(\d\d\d)/pack('c',$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;
            $TC{$entry} = $_ if $TC{$entry} eq '';
        }
    }
    $TC{'pc'} = "\0" if $TC{'pc'} eq '';
    $TC{'bc'} = "\b" if $TC{'bc'} eq '';
}

@Tputs = (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);

sub Tputs {
    local($string,$affcnt,$FH) = @_;
    local($ms);
    if ($string =~ /(^[\d.]+)(\*?)(.*)$/) {
        $ms = $1;
        $ms *= $affcnt if $2;
        $string = $3;
        $decr = $Tputs[$ospeed];
        if ($decr > .1) {
            $ms += $decr / 2;
            $string .= $TC{'pc'} x ($ms / $decr);
        }
    }
    print $FH $string if $FH;
    $string;
}

sub Tgoto {
    local($string) = shift(@_);
    local($result) = '';
    local($after) = '';
    local($code,$tmp) = @_;
    local(@tmp);
    @tmp = ($tmp,$code);
    local($online) = 0;
    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 .= $TC{'up'} if $TC{'up'};
                }
                else {
                    ++$tmp, $after .= $TC{'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";
        }
    }
    $result . $string . $after;
}

1;