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#
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# Maintain a variable to indicate status of a number of requirements
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#
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# --------------
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# Interface
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#
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# exclude(gp) : exclude a group
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# unexclude(gp) : unexclude a group
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# include(gp) : include a group
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# uninclude(gp) : uninclude a group
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# opencontext(gp) : Annonce group context
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# closecontext(gp) : Close group context
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# closelastcontext(set) : Close the last context added to group the group set
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# status() : If include/excluded groups match the current gp context
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# return 1 else 0
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# getincluded() : return an array of included groups
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# getexcluded() : return array of excluded groups
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# clearinclude() : clear all entries from the include list
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# clearexclude() : clear all entries from the exclude list
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# ----------------------------------------------
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# group names are characters. Anything before a :: will indicate the
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# group set upon which the closecontext etc will operate. The group set is
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# still part of the group name.
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#
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package GroupChecker;
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BEGIN { print __PACKAGE__." still used.\n"; exit(1) }
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require 5.001;
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require Exporter;
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@ISA=qw(Exporter);
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# sub new {
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# my $class=shift;
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# $self={};
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# bless $self, $class;
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# $self->{context}{none}=1;
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# return $self;
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# }
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# sub clearinclude {
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# my $self=shift;
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# undef %{$self->{include}};
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# }
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# sub clearexclude {
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# my $self=shift;
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# undef %{$self->{exclude}};
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# }
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# sub exclude {
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# my $self=shift;
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# my $gp=shift;
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# ${$self->{exclude}}{$gp}=1;
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# $self->_setstatus;
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# }
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# sub unexclude {
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# my $self=shift;
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# my $gp=shift;
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# delete ${$self->{exclude}}{$gp};
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# $self->_setstatus;
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# }
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# sub include {
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# my $self=shift;
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# my $gp=shift;
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# ${$self->{include}}{$gp}=1;
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# $self->_setstatus;
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# }
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# sub uninclude {
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# my $self=shift;
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# my $gp=shift;
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# delete ${$self->{include}}{$gp};
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# $self->_setstatus;
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# }
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# sub getexcluded {
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# my $self=shift;
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# return keys %{$self->{exclude}}
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# }
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# sub getincluded {
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# my $self=shift;
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# return keys %{$self->{include}}
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# }
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# sub opencontext {
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# my $self=shift;
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# my $gp=shift;
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# my $set;
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# if ( $gp=~/(.*)::/ ) {
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# $set=$1;
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# }
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# else {
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# $set='none';
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# }
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# push @{$self->{contextstack}{$set}}, $gp;
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# $self->{context}{$gp}=1;
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# $self->_setstatus();
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# }
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# sub closelastcontext {
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# my $self=shift;
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# my $set=shift;
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# my $gp;
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# if ( $set eq "" ) { $set='none' }
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# do {
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# $gp=pop @{$self->{contextstack}{$set}};
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# } while ( (! exists $self->{context}{$gp}) && ($gp eq "") );
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# $self->closecontext($gp);
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# }
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# sub closecontext {
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# my $self=shift;
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# my $gp=shift;
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# if ( $gp=~/(.*)::/ ) {
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# $set=$1;
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# }
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# else {
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# $set='none';
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# }
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# delete $self->{context}{$gp};
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# $self->_setstatus();
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# }
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# sub status {
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# my $self=shift;
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# return $self->{status};
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# }
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# # -------------- Support Routines -----------------------------------
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# sub _setstatus {
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# my $self=shift;
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# my $i;
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# $self->{status}=1;
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# foreach $i ( keys %{$self->{context}} ) {
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# if ( ( exists $self->{include}{$i} )
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# || ( exists $self->{include}{all} ) ) {
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# $self->{status}=( $self->{status} && 1);
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# }
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# if ( exists $self->{exclude}{$i} ) {
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# $self->{status}=0;
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# }
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# }
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# }
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1;
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