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lib/Acme/Perl/VM.pm  view on Meta::CPAN

# Utilities

sub sv_defined{
    my($sv) = @_;

    return $sv && ${$sv} && defined(${ $sv->object_2svref });
}

sub is_not_null{
    my($sv) = @_;
    return ${$sv};
}
sub is_null{
    my($sv) = @_;
    return !${$sv};
}

my %not_a_scalar;
@not_a_scalar{qw(AV HV CV IO)} = ();
sub is_scalar{
    my($sv) = @_;
    return !exists $not_a_scalar{ $sv->class };
}

sub mark_list{
    my($mark) = @_;
    return map{ ${ $_->object_2svref } } splice @PL_stack, $mark+1;
}


our %external;

sub apvm_extern{
    foreach my $arg(@_){
        if(ref $arg){
            if(ref($arg) ne 'CODE'){
                Carp::croak('Not a CODE reference for apvm_extern()');
            }
            $external{refaddr $arg} = 1;
        }
        else{
            my $stash = do{ no strict 'refs'; \%{$arg .'::'} };
            while(my $name = each %{$stash}){
                my $code_ref = do{ no strict 'refs'; *{$arg . '::' . $name}{CODE} };
                if(defined $code_ref){
                    $external{refaddr $code_ref} = 1;
                }
            }
        }
    }
    return;
}

sub cv_external{
    my($cv) = @_;
    return $cv->XSUB || $external{ ${$cv} };
}

sub ddx{
    require Data::Dumper;
    my $ddx = Data::Dumper->new(@_);
    $ddx->Indent(1);
    $ddx->Terse(TRUE);
    $ddx->Quotekeys(FALSE);
    $ddx->Useqq(TRUE);
    return $ddx if defined wantarray;

    my $name = ( split '::', (caller 2)[3] )[-1];
    print STDERR $name, ': ', $ddx->Dump(), "\n";
    return;
}
sub dump_object{
    ddx([[ map{ $_ ? $_->object_2svref : $_ } @_ ]]);
}

sub dump_value{
    ddx([\@_]);
}


sub dump_stack{
    require Data::Dumper;
    no warnings 'once';

    local $Data::Dumper::Indent    = 0;
    local $Data::Dumper::Terse     = TRUE;
    local $Data::Dumper::Quotekeys = FALSE;
    local $Data::Dumper::Useqq     = TRUE;

    deb "(%s)\n", join q{,}, map{
        # find variable name
        my $varname = '';
        my $class   = $_->class;

        if($class eq 'SPECIAL'){
            ($varname = $_->special_name) =~ s/^\&PL_//;
            $varname;
        }
        elsif($class eq 'CV'){
            $varname = '&' . gv_fullname($_->GV);
        }
        else{
            for(my $padix = 0; $padix < @PL_curpad; $padix++){
                my $padname;
                if(${ $PL_curpad[$padix] } == ${ $_ }){
                    $padname = $PL_comppad_name->ARRAYelt($padix);
                }
                elsif($_->ROK && ${$PL_curpad[$padix]} == ${ $_->RV }){
                    $padname = $PL_comppad_name->ARRAYelt($padix);
                    $varname .= '\\';
                }

                if($padname){
                    if($padname->POK){
                        $varname .= $padname->PVX . ' ';
                    }
                    last;
                }
            }
            $varname . Data::Dumper->Dump([is_scalar($_) ? ${$_->object_2svref} : $_->object_2svref], [$_->ROK ? 'SV' : '*SV']);
        }

    } @PL_stack;

    return;
}
sub _dump_stack{
    my $warn;
    my $ddx = ddx([[map{
            if(ref $_){
                is_scalar($_) ? ${$_->object_2svref} : $_->object_2svref;
            }
            else{
                $warn++;
                $_;
            }
    } @PL_stack]], ['*PL_stack']);
    $ddx->Indent(0);
    deb "  %s\n", $ddx->Dump();

    if($warn){
        apvm_die 'No sv found (%d)', $warn;
    }
    return;
}

sub dump_si{
    my %stack_info = (
        stack     => \@PL_stack,
        markstack => \@PL_markstack,
        cxstack   => \@PL_cxstack,
        scopstack => \@PL_scopestack,
        savestack => \@PL_savestack,
        tmps      => \@PL_tmps,
    );

    ddx([\%stack_info]);
}

sub not_implemented{
    if(!@_){
        if($PL_op && is_not_null($PL_op)){
            @_ = ($PL_op->name);
        }
        else{
            @_ = (caller 0)[3];
        }
    }

    push @_, ' is not implemented';
    goto &Carp::confess;
}


sub call_sv{ # perl.h
    my($sv, $flags) = @_;

    if($flags & G_DISCARD){
        ENTER;
        SAVETMPS;