# Structure matrix [states,nonstates,inputs,outputs,zero_outputs]

# ###############################################################
# ## Version control history
# ###############################################################
# ## $Id$
# ## $Log$
# ## Revision 1.30  1998/09/02 11:14:23  peterg
# ## Revised to use ordered lists of subsystems and ports
# ##
# ## Revision 1.29  1998/08/25 09:22:34  peterg
# ## Correctely recognises port SSs its now easy -- they are in there own
# ## field
# ##
# ## Revision 1.28  1998/08/25 08:31:42  peterg
# ## Fixed bug - didn't find the ports - use deblank
# ##

  # encountered first and so the counters will not be messed up by subsystems.
  local_u_index = 0;
  local_y_index = 0;

  if (length(system_args)==0)
    mtt_info(sprintf("No arguments given so no argument aliasing done for system %s(%s)",\
		     system_name,system_type), infofilenum);
    AliasingArguments=0;
  else
    AliasingArguments=1;
  endif;

  if (length(system_cr)==0)
    mtt_info(sprintf("No cr given so no cr aliasing done for system %s(%s)",\
		     system_name,system_type), infofilenum);
    AliasingCRs=0;
  else
  endif;
    AliasingCRs=1;  endif;


  fields=["ports";"subsystems"]; # Do for both ports and subsystems -
				# ports first
  lists=["portlist";"subsystemlist"];
  for i=1:2
    field=deblank(fields(i,:));

    	bond_list = abs(comp);
    	direction = sign(comp)'*[1 1];
				# Convert from arrow orientated to component orientated causality
    	comp_bonds = CBG.bonds(bond_list,:).*direction;
	
    	disp(["---- ", field, " ---"]);    
    	
				# Alias the args list -- if not at top level
    	message = sprintf("\tfor component  %s (%s) within %s",\
			  comp_name,subsystem.type,full_name);    
    	if struct_contains(CBG,"alias")
	  subsystem.arg = alias_args(subsystem.arg,CBG.alias,";",message,infofilenum)
	  subsystem.cr = alias_args(subsystem.cr,CBG.alias,";",message,infofilenum)
    	endif;

	if AliasingArguments	# Alias the args list if appropriate
    	  message = sprintf("\tfor component  %s (%s) within %s",\
			    comp_name,subsystem.type,full_name);    
    	  if struct_contains(CBG,"alias")
	    subsystem.arg = alias_args(subsystem.arg,CBG.alias,";",message,infofilenum)
    	  endif;
	endif;

	if AliasingCRs	# Alias the CR list if appropriate
    	  message = sprintf("\tfor component  %s (%s) within %s",\
			    comp_name,subsystem.type,full_name);    
    	  if struct_contains(CBG,"alias")
	    subsystem.cr = alias_args(subsystem.cr,CBG.alias,";",message,infofilenum)
    	  endif;
	endif;
	
			# Substitute positional ($1 etc) arguments
    	subsystem.cr = subs_arg(subsystem.cr,system_cr, ...
				"lin",full_name,subsystem.type,comp_name,infofilenum);
    	subsystem.arg = subs_arg(subsystem.arg,system_args, ...
				 "1",full_name,subsystem.type,comp_name,infofilenum);