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#
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# Runtime.pm
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#
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# Written by Christopher Williams
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#
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# Description
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# -----------
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# Prepare a runtime environment
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#
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# Interface
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# ---------
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# new() : A new Runtime object
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# file(file) : Specify an environment description file
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# doc(var) : Print out any documentation for the runtime env
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# list() : return a list of all variables set
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# sethash(hashref) : Set the environment in the hash provided
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# printenv(shell) : output environment to stdout in shell format
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# getvalue(var) : return a string - modified by type for the var specified
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# addvar(name,value[,type]) : add a variable - if necessary specify a type
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# unshiftvar(name,value{,type]) : unshift a variable
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package Runtime;
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require 5.004;
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use ActiveDoc::SimpleDoc;
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sub new {
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my $class=shift;
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$self={};
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$self->{Arch}=1;
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$self->{validtypes}={ 'path'=>1 };
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push @{$self->{ARCHBLOCK}}, $self->{Arch};
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bless $self, $class;
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return $self;
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}
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sub file {
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my $self=shift;
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my $filename=shift;
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$self->_parsefile($filename);
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}
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sub sethash {
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my $self=shift;
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my $hashref=shift;
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foreach $var ( @{$self->{'varlist'}} ) {
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$$hashref{$var}=$self->_expandvar($self->getvalue($var));
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}
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}
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sub printenv {
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my $self=shift;
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my $shell=shift;
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foreach $var ( @{$self->{'varlist'}} ) {
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$self->_printoutenv($shell,$var,
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$self->_expandvar($self->getvalue($var)));
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}
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}
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sub list {
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my $self=shift;
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return @{$self->{'varlist'}};
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}
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sub doc {
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my $self=shift;
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my $var=shift;
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return $self->{vardoc}{$var};
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}
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sub getvalue {
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my $self=shift;
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my $name=shift;
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my $string;
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my @vals=@{$self->{vars}{$name}};
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if ( defined $self->{'vartype'}{$name} ) { #any type proceesing
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$string=&{"_".$self->{'vartype'}{$name}}($self,@vals);
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}
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else {
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$string=$vals[0];
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}
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return $string;
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}
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sub addvar {
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my $self=shift;
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my $name=shift;
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my $val=shift;
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push @{$self->{'varlist'}}, $name;
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push @{$self->{'vars'}{$name}}, $val;
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if ( @_ ) {
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$self->{'vartype'}{$name}=shift;;
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}
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else {
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$self->{'vartype'}{$name}=undef;
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}
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}
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sub unshiftvar {
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my $self=shift;
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my $name=shift;
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my $val=shift;
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if ( exists $self->{'vars'}{$name} ) {
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unshift @{$self->{'vars'}{$name}}, $val;
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}
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else {
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$self->addvar($name,$val,@_);
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}
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}
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# ---- Support Routines
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sub _expandvar {
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my $self=shift;
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my $string=shift;
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return "" , if ( ! defined $string );
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$string=~s{
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\$\((\w+)\)
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}{
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if (defined $ENV{$1}) {
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$self->_expandvar($ENV{$1});
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} else {
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"\$".$1;
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}
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}egx;
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$string=~s{
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\$(\w+)
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}{
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if (defined $ENV{$1}) {
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$self->_expandvar($ENV{$1});
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} else {
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"\$".$1;
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}
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}egx;
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return $string;
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}
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sub _path {
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my $self=shift;
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my @vals=@_;
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@vals=$self->_removedoubles(@vals);
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my $string=join ":", @vals;
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return $string;
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}
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#
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# removes doubles and whitespace
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#
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sub _removedoubles {
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my $self=shift;
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my @red=();
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foreach $elem ( @_ ) {
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$elem=~s/^\s+//; # chop leading whitespace
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if ( (! grep { $_ eq $elem } @red ) && ( $elem ne "")) {
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push @red,$elem;
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}
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}
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return @red;
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}
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sub _parsefile {
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my $self=shift;
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my $filename=shift;
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$self->{switch}=ActiveDoc::SimpleDoc->new();
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$self->{switch}->newparse("runtime");
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$self->{switch}->addignoretags("runtime");
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$self->{switch}->filetoparse($filename);
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$self->{switch}->addtag("runtime","Runtime",
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\&Runtime_start, $self,
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\&Runtime_text, $self,
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\&Runtime_end, $self);
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$self->{switch}->addtag("runtime","Architecture",
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\&Arch_Start, $self, "",$self, \&Arch_End, $self);
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$self->{Runtimecontext}=0;
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$self->{switch}->parse("runtime");
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}
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sub _printoutenv {
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my $self=shift;
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my $shell=shift;
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my $variable=shift;
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my $value=shift;
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if ( $shell eq "csh" ) {
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print "setenv $variable \"$value\";\n";
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}
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elsif ( $shell eq "sh" ) {
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print "$variable=\"$value\";\n";
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print "export $variable;\n";
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}
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}
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# ------ Tag Routines
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sub Runtime_start {
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my $self=shift;
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my $name=shift;
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my $hashref=shift;
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$self->{switch}->checktag($name,$hashref,'name');
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$self->{switch}->checktag($name,$hashref,'value');
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if ( $self->{Arch} ) {
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if ( $self->{Runtimecontext} == 1 ) {
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$self->{switch}->parseerror("No </$name> before new tag");
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}
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$self->{Runtimecontext}=1;
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push @{$self->{'varlist'}}, $$hashref{'name'};
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push @{$self->{'vars'}{$$hashref{'name'}}}, $$hashref{'value'};
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if ( defined $$hashref{'type'} ) {
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if ( ( exists $self->{'vartype'}{$$hashref{'name'}} ) &&
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( $self->{'vartype'}{$$hashref{'name'}} ne $$hashref{'type'}) ){
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$self->{switch}->parseerror("Redefinition of Variable".
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" type for ".$$hashref{'name'});
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}
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$self->{'vartype'}{$$hashref{'name'}}=$$hashref{'type'};
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if ( defined $self->{validtypes}{$$hashref{'type'}} ) {
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$self->{switch}->parseerror(
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"Unknown type ".$$hashref{'type'});
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}
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}
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else {
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$self->{'vartype'}{$$hashref{'name'}}=undef;
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}
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}
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}
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sub Runtime_text {
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my $self=shift;
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my $name=shift;
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my @vars=@_;
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if ( $self->{Arch} ) {
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my $var=$self->{varlist}[$#{$self->{varlist}}];
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$self->{'vardoc'}{$var}=$self->{'vardoc'}{$var}.
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(join "", @vars);
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}
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}
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sub Runtime_end {
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my $self=shift;
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my $name=shift;
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if ( $self->{Arch} ) {
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$self->{Runtimecontext}=0;
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}
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}
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sub Arch_Start {
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my $self=shift;
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my $name=shift;
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my $hashref=shift;
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$toolswitch->checktag($name, $hashref,'name');
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( ($ENV{SCRAM_ARCH}=~/$$hashref{name}.*/) )? ($self->{Arch}=1)
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: ($self->{Arch}=0);
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push @{$self->{ARCHBLOCK}}, $self->{Arch};
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}
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sub Arch_End {
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my $self=shift;
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my $name=shift;
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pop @{$self->{ARCHBLOCK}};
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$self->{Arch}=$self->{ARCHBLOCK}[$#{$self->{ARCHBLOCK}}];
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}
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