### Class Verify: Verify SFD info #################################################

BEGIN {
    package Verify;

    sub new {
      my $proto       = shift;
      my %params      = @_;
      my $class       = ref($proto) || $proto;
      my $self        = {};
      $self->{SFD}    = $params{'sfd'};
      $self->{CNT}    = 0;
      $self->{FUNCS}  = {};
      $self->{ERRORS} = 0;
      $self->{WARNS}  = 0;
      bless ($self, $class);
      return $self;
    }

    sub header {
      my $self      = shift;
      my $sfd       = $self->{SFD};

      print "Checking SFD for $$sfd{'libname'} ...";
      $self->{CNT} = 0;

      if ($#{\@{$sfd->{typedefs}}} != -1) {
          print "\nWarning: SFD uses nonstandard '==typedef' command.";
          ++$self->{WARNS};
      }
    }

    sub function {
      my $self      = shift;
      my %params    = @_;
      my $prototype = $params{'prototype'};
      my $sfd       = $self->{SFD};

      if ($self->{FUNCS}{$prototype->{funcname}}) {
          if ($prototype->{private}) {
            print "\nWarning: Private function $prototype->{funcname}() ".
                "is defined more than once!";
            ++$self->{WARNS};
          }
          else {
            print "\nError: Public function $prototype->{funcname}() ".
                "is defined more than once!";
            ++$self->{ERRORS};
          }
      }
      else {
          $self->{FUNCS}{$prototype->{funcname}} = 1;
      }

      ++$self->{CNT};
    }

    sub footer {
      my $self = shift;
      my $sfd  = $self->{SFD};

      if ($self->{WARNS} != 0 || $self->{ERRORS} != 0) {
          print "\n$self->{WARNS} warning(s), $self->{ERRORS} error(s); ";

          die if $self->{ERRORS};
      }
      printf " $self->{CNT} function%s verified\n", $self->{CNT} == 1 ? "" : "s";
    }
}