% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %% Version control history
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %% $Id$
% %% $Log$
% %% Revision 1.13  1997/09/18 13:15:15  peterg
% %% Fixed incorrect error message flagging inappropriate flow outputs
% %% -- used to give the effort rather than the flow in the error message.
% %%
% %% Revision 1.12  1997/08/26 07:51:30  peterg
% %% Now counts the local input and outputs by order of appearence rather
% %% than by port number - it therfore handles ports with bicausality correctely.
% %%
% %% Revision 1.11  1997/05/09 08:21:07  peterg
% %% Explicit computation of port number -- avoids str2num
% %%

  flow_attribute = 'external';
end;


inputs = structure(3);
outputs = structure(4);
zero_outputs = structure(5);
unknown_inputs = structure(6);

if strcmp(effort_attribute, 'MTT_port') % Its a named port

% Note: we don't have numbered ports now, so the correct indices are deduced
% by incrementing the two globals: local_u_index and local_y_index
% $$$   % Convert string to number
% $$$   % port_number = abs(flow_attribute)-abs('0');

% Now do SS which are not ports.
% Effort
if strcmp(effort_attribute, 'external')
  if bonds(1,1)==-1 % Source
    inputs = inputs+1;
    fprintf(filenum, '%s := MTTu(%d,1);\n', ...
	varname(name, bond_number,1),inputs);
  else % Sensor
    outputs = outputs+1;
    fprintf(filenum, 'MTTy(%d,1) := %s;\n', ...
	outputs, varname(name, bond_number,1));
  end;
elseif strcmp(effort_attribute, 'internal')
  % Do nothing
else 
  if bonds(1,1)==-1 % Named or unknown source
    if strcmp(effort_attribute, 'unknown') % Unknown input
      fprintf(filenum, '%s := MTTUi%d;\n', ...
	  varname(name, bond_number,-1), zero_outputs);
    else
      fprintf(filenum, '%s := %s;\n', ...
	  varname(name, bond_number,1), effort_attribute);
    end;
  else % Sensor
    if strcmp(effort_attribute, 'zero') %Zero output
      zero_outputs = zero_outputs + 1;
      fprintf(filenum, 'MTTyz%d := %s;\n', ...
	  zero_outputs, varname(name, bond_number,1));


    else
      mtt_info([effort_attribute, ' not appropriate for an output '],STDerr);
    end;
  end;
end;
  
% Flow
if strcmp(flow_attribute, 'external')
  if bonds(1,2)==1 % Source
    inputs = inputs+1;
    fprintf(filenum, '%s := MTTu(%d,1);\n', varname(name, bond_number,-1),inputs);
  else % Sensor
    outputs = outputs+1;
    fprintf(filenum, 'MTTy(%d,1) := %s;\n', outputs, ...
	varname(name, bond_number,-1));
  end;
elseif strcmp(flow_attribute, 'unknown') % Unknown input
  unknown_inputs = unknown_inputs + 1;
  fprintf(filenum, '%s := MTTUi%d;\n', ...
      varname(name, bond_number,-1), unknown_inputs);
elseif strcmp(flow_attribute, 'internal')
  % Do nothing
else % Named constant
  if bonds(1,2)==1 % Source
    fprintf(filenum, '%s := %s;\n', ...
	varname(name, bond_number,-1), flow_attribute);
  else % Sensor
    if strcmp(flow_attribute, 'zero') %Zero output
      zero_outputs = zero_outputs + 1;
      fprintf(filenum, 'MTTyz%d := %s;\n', ...
	  zero_outputs, varname(name, bond_number,-1));


    else
      mtt_info([flow_attribute, ' not appropriate for an output '], ...
	  STDerr);
    end;
  end;
end;


structure(3) = inputs;
structure(4) = outputs;
structure(5) = zero_outputs;
structure(6) = unknown_inputs;