trunk/Source/Modules/octave.cxx

/* -----------------------------------------------------------------------------
 * See the LICENSE file for information on copyright, usage and redistribution
 * of SWIG, and the README file for authors - http://www.swig.org/release.html.
 *
 * octave.cxx
 *
 * Octave language module for SWIG.
 * ----------------------------------------------------------------------------- */

char cvsroot_octave_cxx[] = "$Id$";

#include "swigmod.h"

static const char *usage = (char *) "\
Octave Options (available with -octave)\n\
     (none yet)\n\n";


class OCTAVE:public Language {
private:
  File *f_runtime;
  File *f_header;
  File *f_doc;
  File *f_wrappers;
  File *f_init;
  File *f_initbeforefunc;
  File *f_directors;
  File *f_directors_h;
  String *s_global_tab;
  String *s_members_tab;
  String *class_name;

  int have_constructor;
  int have_destructor;
  String *constructor_name;

  Hash *docs;

public:
   OCTAVE():f_runtime(0), f_header(0), f_doc(0), f_wrappers(0),
	    f_init(0), f_initbeforefunc(0), f_directors(0), f_directors_h(0), 
	    s_global_tab(0), s_members_tab(0), class_name(0) {
     enable_cplus_runtime_mode();
     allow_overloading();
     director_multiple_inheritance = 1;
     director_language = 1;
     docs = NewHash();
   }

  virtual void main(int argc, char *argv[]) {
    for (int i = 1; i < argc; i++) {
      if (argv[i]) {
	if (strcmp(argv[i], "-help") == 0) {
	  fputs(usage, stderr);
	}
      }
    }

    SWIG_library_directory("octave");
    Preprocessor_define("SWIGOCTAVE 1", 0);
    SWIG_config_file("octave.swg");
    SWIG_typemap_lang("octave");
    allow_overloading();
  }

  virtual int top(Node *n) {
    {
      Node *mod = Getattr(n, "module");
      if (mod) {
	Node *options = Getattr(mod, "options");
	if (options) {
	  int dirprot = 0;
	  if (Getattr(options, "dirprot")) {
	    dirprot = 1;
	  }
	  if (Getattr(options, "nodirprot")) {
	    dirprot = 0;
	  }
	  if (Getattr(options, "directors")) {
	    allow_directors();
	    if (dirprot)
	      allow_dirprot();
	  }
	}
      }
    }

    String *module = Getattr(n, "name");
    String *outfile = Getattr(n, "outfile");
    f_runtime = NewFile(outfile, "w");
    if (!f_runtime) {
      FileErrorDisplay(outfile);
      SWIG_exit(EXIT_FAILURE);
    }
    f_header = NewString("");
    f_doc = NewString("");
    f_wrappers = NewString("");
    f_init = NewString("");
    f_initbeforefunc = NewString("");
    f_directors_h = NewString("");
    f_directors = NewString("");
    s_global_tab = NewString("");
    Swig_register_filebyname("runtime", f_runtime);
    Swig_register_filebyname("header", f_header);
    Swig_register_filebyname("doc", f_doc);
    Swig_register_filebyname("wrapper", f_wrappers);
    Swig_register_filebyname("init", f_init);
    Swig_register_filebyname("initbeforefunc", f_initbeforefunc);
    Swig_register_filebyname("director", f_directors);
    Swig_register_filebyname("director_h", f_directors_h);
    Swig_banner(f_runtime);
    Printf(f_runtime, "#define SWIG_name_d      \"%s\"\n", module);
    Printf(f_runtime, "#define SWIG_name        %s\n", module);

    if (directorsEnabled()) {
      Swig_banner(f_directors_h);
      if (dirprot_mode()) {
	//      Printf(f_directors_h, "#include <map>\n");
	//      Printf(f_directors_h, "#include <string>\n\n");
      }
    }


    Printf(s_global_tab, "\nstatic const struct swig_octave_member swig_globals[] = {\n");
    Printf(f_init, "static void SWIG_init_user(octave_swig_type* module_ns)\n{\n");

    if (!CPlusPlus)
      Printf(f_header,"extern \"C\" {\n");

    Language::top(n);

    if (!CPlusPlus)
      Printf(f_header,"}\n");

    if (Len(docs))
      emit_doc_texinfo();

    if (directorsEnabled())
      Swig_insert_file("director.swg", f_runtime);

    Printf(f_init, "}\n");
    Printf(s_global_tab, "{0,0,0,0,0}\n};\n");

    Printv(f_wrappers, s_global_tab, NIL);
    SwigType_emit_type_table(f_runtime, f_wrappers);
    Dump(f_header, f_runtime);
    Dump(f_doc, f_runtime);
    if (directorsEnabled()) {
      Dump(f_directors_h, f_runtime);
      Dump(f_directors, f_runtime);
    }
    Dump(f_wrappers, f_runtime);
    Dump(f_initbeforefunc, f_runtime);
    Wrapper_pretty_print(f_init, f_runtime);

    Delete(s_global_tab);
    Delete(f_initbeforefunc);
    Delete(f_init);
    Delete(f_wrappers);
    Delete(f_doc);
    Delete(f_header);
    Delete(f_directors);
    Delete(f_directors_h);
    Close(f_runtime);
    Delete(f_runtime);

    return SWIG_OK;
  }

  String *texinfo_escape(String *_s) {
    const char* s=(const char*)Data(_s);
    while (*s&&(*s=='\t'||*s=='\r'||*s=='\n'||*s==' '))
      ++s;
    String *r = NewString("");
    for (int j=0;s[j];++j) {
      if (s[j] == '\n') {
	Append(r, "\\n\\\n");
      } else if (s[j] == '\r') {
	Append(r, "\\r");
      } else if (s[j] == '\t') {
	Append(r, "\\t");
      } else if (s[j] == '\\') {
	Append(r, "\\\\");
      } else if (s[j] == '\'') {
	Append(r, "\\\'");
      } else if (s[j] == '\"') {
	Append(r, "\\\"");
      } else
	Putc(s[j], r);
    }
    return r;
  }
  void emit_doc_texinfo() {
    for (Iterator it = First(docs); it.key; it = Next(it)) {
      String *wrap_name = it.key;

      String *synopsis = Getattr(it.item, "synopsis");
      String *decl_info = Getattr(it.item, "decl_info");
      String *cdecl_info = Getattr(it.item, "cdecl_info");
      String *args_info = Getattr(it.item, "args_info");

      String *doc_str = NewString("");
      Printv(doc_str, synopsis, decl_info, cdecl_info, args_info, NIL);
      String *escaped_doc_str = texinfo_escape(doc_str);

      if (Len(doc_str)>0) {
	Printf(f_doc,"const char* %s_texinfo = ",wrap_name);
	Printf(f_doc,"\"-*- texinfo -*-\\n\\\n%s", escaped_doc_str);
	if (Len(decl_info))
	  Printf(f_doc,"\\n\\\n@end deftypefn");
	Printf(f_doc,"\";\n");
      }

      Delete(escaped_doc_str);
      Delete(doc_str);
      Delete(wrap_name);
    }
    Printf(f_doc,"\n");
  }
  bool is_empty_doc_node(Node* n) {
    if (!n)
      return true;
    String *synopsis = Getattr(n, "synopsis");
    String *decl_info = Getattr(n, "decl_info");
    String *cdecl_info = Getattr(n, "cdecl_info");
    String *args_info = Getattr(n, "args_info");
    return !Len(synopsis) && !Len(decl_info) && 
      !Len(cdecl_info) && !Len(args_info);
  }
  String *texinfo_name(Node* n) {
    String *tname = NewString("");
    String *iname = Getattr(n, "sym:name");
    String *wname = Swig_name_wrapper(iname);
    Node* d = Getattr(docs, wname);

    if (is_empty_doc_node(d))
      Printf(tname, "0");
    else
      Printf(tname, "%s_texinfo", wname);

    return tname;
  }
  void process_autodoc(Node *n) {
    String *iname = Getattr(n, "sym:name");
    String *name = Getattr(n, "name");
    String *wname = Swig_name_wrapper(iname);
    String *str = Getattr(n, "feature:docstring");
    bool autodoc_enabled = !Cmp(Getattr(n, "feature:autodoc"), "1");
    Node* d = Getattr(docs, wname);
    if (!d) {
      d = NewHash();
      Setattr(d, "synopsis", NewString(""));
      Setattr(d, "decl_info", NewString(""));
      Setattr(d, "cdecl_info", NewString(""));
      Setattr(d, "args_info", NewString(""));
      Setattr(docs, wname, d);
    }

    String *synopsis = Getattr(d, "synopsis");
    String *decl_info = Getattr(d, "decl_info");
    //    String *cdecl_info = Getattr(d, "cdecl_info");
    String *args_info = Getattr(d, "args_info");

    // * couldn't we just emit the docs here?

    if (autodoc_enabled) {
      String *decl_str = NewString("");
      String *args_str = NewString("");
      make_autodocParmList(n, decl_str, args_str);
      Append(decl_info, "@deftypefn {Loadable Function} ");

      SwigType *type = Getattr(n, "type");
      if (type && Strcmp(type, "void")) {
	type = SwigType_base(type);
	Node *lookup = Swig_symbol_clookup(type, 0);
	if (lookup)
	  type = Getattr(lookup, "sym:name");
	Append(decl_info, "@var{retval} = ");
	String *type_str = NewString("");
	Printf(type_str, "@var{retval} is of type %s. ", type);
	Append(args_str, type_str);
	Delete(type_str);
      }

      Append(decl_info, name);
      Append(decl_info, " (");
      Append(decl_info, decl_str);
      Append(decl_info, ")\n");
      Append(args_info, args_str);
      Delete(decl_str);
      Delete(args_str);
    }

    if (str && Len(str) > 0) {
      // strip off {} if necessary
      char *t = Char(str);
      if (*t == '{') {
	Delitem(str, 0);
	Delitem(str, DOH_END);
      }

      // emit into synopsis section
      Append(synopsis, str);
    }
  }

  virtual int importDirective(Node *n) {
    String *modname = Getattr(n, "module");
    if (modname)
      Printf(f_init, "feval(\"%s\",octave_value_list(),0);\n", modname);
    return Language::importDirective(n);
  }

  const char *get_implicitconv_flag(Node *n) {
    int conv = 0;
    if (n && GetFlag(n, "feature:implicitconv")) {
      conv = 1;
    }
    return conv ? "SWIG_POINTER_IMPLICIT_CONV" : "0";
  }

  void make_autodocParmList(Node *n, String *decl_str, String *args_str) {
    String *pdocs = Copy(Getattr(n, "feature:pdocs"));
    ParmList *plist = CopyParmList(Getattr(n, "parms"));
    Parm *p;
    Parm *pnext;
    Node *lookup;

    if (pdocs)
      Append(pdocs, "\n");

    Swig_typemap_attach_parms("in", plist, 0);
    Swig_typemap_attach_parms("doc", plist, 0);

    for (p = plist; p; p = pnext) {
      String *name = 0;
      String *type = 0;
      String *value = 0;
      String *ptype = 0;
      String *pdoc = Getattr(p, "tmap:doc");
      if (pdoc) {
	name = Getattr(p, "tmap:doc:name");
	type = Getattr(p, "tmap:doc:type");
	value = Getattr(p, "tmap:doc:value");
	ptype = Getattr(p, "tmap:doc:pytype");
      }

      name = name ? name : Getattr(p, "name");
      type = type ? type : Getattr(p, "type");
      value = value ? value : Getattr(p, "value");

      String *tex_name = NewString("");
      if (name)
	Printf(tex_name, "@var{%s}", name);
      else
	Printf(tex_name, "@var{?}");

      String *tm = Getattr(p, "tmap:in");
      if (tm) {
	pnext = Getattr(p, "tmap:in:next");
      } else {
	pnext = nextSibling(p);
      }

      if (Len(decl_str))
	Append(decl_str, ", ");
      Append(decl_str, tex_name);

      if (value) {
	if (Strcmp(value, "NULL") == 0)
	  value = NewString("nil");
	else if (Strcmp(value, "true") == 0 || Strcmp(value, "TRUE") == 0)
	  value = NewString("true");
	else if (Strcmp(value, "false") == 0 || Strcmp(value, "FALSE") == 0)
	  value = NewString("false");
	else {
	  lookup = Swig_symbol_clookup(value, 0);
	  if (lookup)
	    value = Getattr(lookup, "sym:name");
	}
	Printf(decl_str, " = %s", value);
      }

      if (type) {
	String *type_str = NewString("");
	type = SwigType_base(type);
	lookup = Swig_symbol_clookup(type, 0);
	if (lookup)
	  type = Getattr(lookup, "sym:name");
	Printf(type_str, "%s is of type %s. ", tex_name, type);
	Append(args_str, type_str);
	Delete(type_str);
      }

      Delete(tex_name);
    }
    if (pdocs)
      Setattr(n, "feature:pdocs", pdocs);
    Delete(plist);
  }

  virtual int functionWrapper(Node *n) {
    Wrapper *f = NewWrapper();
    Parm *p;
    String *tm;
    int j;

    String *nodeType = Getattr(n, "nodeType");
    int constructor = (!Cmp(nodeType, "constructor"));
    int destructor = (!Cmp(nodeType, "destructor"));
    String *storage = Getattr(n, "storage");

    bool overloaded = !!Getattr(n, "sym:overloaded");
    bool last_overload = overloaded && !Getattr(n, "sym:nextSibling");
    String *iname = Getattr(n, "sym:name");
    String *wname = Swig_name_wrapper(iname);
    String *overname = Copy(wname);
    SwigType *d = Getattr(n, "type");
    ParmList *l = Getattr(n, "parms");

    if (!overloaded && !addSymbol(iname, n))
      return SWIG_ERROR;

    if (overloaded)
      Append(overname, Getattr(n, "sym:overname"));

    Printv(f->def, "static octave_value_list ", overname, " (const octave_value_list& args, int nargout) {", NIL);

    emit_parameter_variables(l, f);
    emit_attach_parmmaps(l, f);
    Setattr(n, "wrap:parms", l);

    int num_arguments = emit_num_arguments(l);
    int num_required = emit_num_required(l);
    int varargs = emit_isvarargs(l);
    char source[64];

    Printf(f->code, "if (!SWIG_check_num_args(\"%s\",args.length(),%i,%i,%i)) " 
	   "{\n SWIG_fail;\n }\n", iname, num_arguments, num_required, varargs);

    if (constructor && num_arguments == 1 && num_required == 1) {
      if (Cmp(storage, "explicit") == 0) {
	Node *parent = Swig_methodclass(n);
	if (GetFlag(parent, "feature:implicitconv")) {
	  String *desc = NewStringf("SWIGTYPE%s", SwigType_manglestr(Getattr(n, "type")));
	  Printf(f->code, "if (SWIG_CheckImplicit(%s)) SWIG_fail;\n", desc);
	  Delete(desc);
	}
      }
    }

    for (j = 0, p = l; j < num_arguments; ++j) {
      while (checkAttribute(p, "tmap:in:numinputs", "0")) {
	p = Getattr(p, "tmap:in:next");
      }

      SwigType *pt = Getattr(p, "type");

      String *tm = Getattr(p, "tmap:in");
      if (tm) {
	if (!tm || checkAttribute(p, "tmap:in:numinputs", "0")) {
	  p = nextSibling(p);
	  continue;
	}

	sprintf(source, "args(%d)", j);
	Setattr(p, "emit:input", source);

	Replaceall(tm, "$source", Getattr(p, "emit:input"));
	Replaceall(tm, "$input", Getattr(p, "emit:input"));
	Replaceall(tm, "$target", Getattr(p, "lname"));

	if (Getattr(p, "wrap:disown") || (Getattr(p, "tmap:in:disown"))) {
	  Replaceall(tm, "$disown", "SWIG_POINTER_DISOWN");
	} else {
	  Replaceall(tm, "$disown", "0");
	}

	if (Getattr(p, "tmap:in:implicitconv")) {
	  const char *convflag = "0";
	  if (!Getattr(p, "hidden")) {
	    SwigType *ptype = Getattr(p, "type");
	    convflag = get_implicitconv_flag(classLookup(ptype));
	  }
	  Replaceall(tm, "$implicitconv", convflag);
	  Setattr(p, "implicitconv", convflag);
	}

	String *getargs = NewString("");
	if (j >= num_required)
	  Printf(getargs, "if (%d<args.length()) {\n%s\n}", j, tm);
	else
	  Printv(getargs, tm, NIL);
	Printv(f->code, getargs, "\n", NIL);
	Delete(getargs);

	p = Getattr(p, "tmap:in:next");
	continue;
      } else {
	Swig_warning(WARN_TYPEMAP_IN_UNDEF, input_file, line_number, "Unable to use type %s as a function argument.\n", SwigType_str(pt, 0));
	break;
      }
    }

    // Check for trailing varargs
    if (varargs) {
      if (p && (tm = Getattr(p, "tmap:in"))) {
	Replaceall(tm, "$input", "varargs");
	Printv(f->code, tm, "\n", NIL);
      }
    }

    // Insert constraint checking code
    for (p = l; p;) {
      if ((tm = Getattr(p, "tmap:check"))) {
	Replaceall(tm, "$target", Getattr(p, "lname"));
	Printv(f->code, tm, "\n", NIL);
	p = Getattr(p, "tmap:check:next");
      } else {
	p = nextSibling(p);
      }
    }

    // Insert cleanup code
    String *cleanup = NewString("");
    for (p = l; p;) {
      if ((tm = Getattr(p, "tmap:freearg"))) {
	if (Getattr(p, "tmap:freearg:implicitconv")) {
	  const char *convflag = "0";
	  if (!Getattr(p, "hidden")) {
	    SwigType *ptype = Getattr(p, "type");
	    convflag = get_implicitconv_flag(classLookup(ptype));
	  }
	  if (strcmp(convflag, "0") == 0) {
	    tm = 0;
	  }
	}
	if (tm && (Len(tm) != 0)) {
	  Replaceall(tm, "$source", Getattr(p, "lname"));
	  Printv(cleanup, tm, "\n", NIL);
	}
	p = Getattr(p, "tmap:freearg:next");
      } else {
	p = nextSibling(p);
      }
    }

    // Insert argument output code
    String *outarg = NewString("");
    for (p = l; p;) {
      if ((tm = Getattr(p, "tmap:argout"))) {
	Replaceall(tm, "$source", Getattr(p, "lname"));
	Replaceall(tm, "$target", "_outp");
	Replaceall(tm, "$result", "_outp");
	Replaceall(tm, "$arg", Getattr(p, "emit:input"));
	Replaceall(tm, "$input", Getattr(p, "emit:input"));
	Printv(outarg, tm, "\n", NIL);
	p = Getattr(p, "tmap:argout:next");
      } else {
	p = nextSibling(p);
      }
    }

    int director_method = is_member_director(n) && !is_smart_pointer() && !destructor;
    if (director_method) {
      Wrapper_add_local(f, "upcall", "bool upcall = false");
      Append(f->code, "upcall = !!dynamic_cast<Swig::Director*>(arg1);\n");
    }

    Setattr(n, "wrap:name", overname);

    Swig_director_emit_dynamic_cast(n, f);
    String *actioncode = emit_action(n);

    Wrapper_add_local(f, "_out", "octave_value_list _out");
    Wrapper_add_local(f, "_outp", "octave_value_list *_outp=&_out");
    Wrapper_add_local(f, "_outv", "octave_value _outv");

    // Return the function value
    if ((tm = Swig_typemap_lookup_out("out", n, "result", f, actioncode))) {
      Replaceall(tm, "$source", "result");
      Replaceall(tm, "$target", "_outv");
      Replaceall(tm, "$result", "_outv");

      if (GetFlag(n, "feature:new"))
	Replaceall(tm, "$owner", "1");
      else
	Replaceall(tm, "$owner", "0");

      Printf(f->code, "%s\n", tm);
      Printf(f->code, "if (_outv.is_defined()) _outp = " "SWIG_Octave_AppendOutput(_outp, _outv);\n");
      Delete(tm);
    } else {
      Swig_warning(WARN_TYPEMAP_OUT_UNDEF, input_file, line_number, "Unable to use return type %s in function %s.\n", SwigType_str(d, 0), iname);
    }
    emit_return_variable(n, d, f);

    Printv(f->code, outarg, NIL);
    Printv(f->code, cleanup, NIL);

    if (GetFlag(n, "feature:new")) {
      if ((tm = Swig_typemap_lookup("newfree", n, "result", 0))) {
	Replaceall(tm, "$source", "result");
	Printf(f->code, "%s\n", tm);
      }
    }

    if ((tm = Swig_typemap_lookup("ret", n, "result", 0))) {
      Replaceall(tm, "$source", "result");
      Replaceall(tm, "$result", "_outv");
      Printf(f->code, "%s\n", tm);
      Delete(tm);
    }

    Printf(f->code, "fail:\n");	// we should free locals etc if this happens
    Printf(f->code, "return _out;\n");
    Printf(f->code, "}\n");

    Replaceall(f->code, "$symname", iname);
    Wrapper_print(f, f_wrappers);
    DelWrapper(f);

    if (last_overload)
      dispatchFunction(n);

    if (!overloaded || last_overload) {
      process_autodoc(n);
      String *tname = texinfo_name(n);
      Printf(s_global_tab, "{\"%s\",%s,0,0,2,%s},\n", iname, wname, tname);
      Delete(tname);
    }

    Delete(overname);
    Delete(wname);
    Delete(cleanup);
    Delete(outarg);

    return SWIG_OK;
  }

  void dispatchFunction(Node *n) {
    Wrapper *f = NewWrapper();

    String *iname = Getattr(n, "sym:name");
    String *wname = Swig_name_wrapper(iname);
    int maxargs;
    String *dispatch = Swig_overload_dispatch(n, "return %s(args, nargout);", &maxargs);
    String *tmp = NewString("");

    Printv(f->def, "static octave_value_list ", wname, " (const octave_value_list& args, int nargout) {", NIL);
    Wrapper_add_local(f, "argc", "int argc = args.length()");
    Printf(tmp, "octave_value_ref argv[%d]={", maxargs);
    for (int j = 0; j < maxargs; ++j)
      Printf(tmp, "%soctave_value_ref(args,%d)", j ? "," : " ", j);
    Printf(tmp, "}");
    Wrapper_add_local(f, "argv", tmp);
    Printv(f->code, dispatch, "\n", NIL);
    Printf(f->code, "error(\"No matching function for overload\");\n", iname);
    Printf(f->code, "return octave_value_list();\n");
    Printv(f->code, "}\n", NIL);

    Wrapper_print(f, f_wrappers);
    Delete(tmp);
    DelWrapper(f);
    Delete(dispatch);
    Delete(wname);
  }

  virtual int variableWrapper(Node *n) {
    String *name = Getattr(n, "name");
    String *iname = Getattr(n, "sym:name");
    SwigType *t = Getattr(n, "type");

    if (!addSymbol(iname, n))
      return SWIG_ERROR;

    String *tm;
    Wrapper *getf = NewWrapper();
    Wrapper *setf = NewWrapper();

    String *getname = Swig_name_get(iname);
    String *setname = Swig_name_set(iname);

    Printf(setf->def, "static octave_value_list _wrap_%s(const octave_value_list& args,int nargout) {", setname);
    Printf(setf->def, "if (!SWIG_check_num_args(\"%s_set\",args.length(),1,1,0)) return octave_value_list();", iname);
    if (is_assignable(n)) {
      Setattr(n, "wrap:name", setname);
      if ((tm = Swig_typemap_lookup("varin", n, name, 0))) {
	Replaceall(tm, "$source", "args(0)");
	Replaceall(tm, "$target", name);
	Replaceall(tm, "$input", "args(0)");
	if (Getattr(n, "tmap:varin:implicitconv")) {
	  Replaceall(tm, "$implicitconv", get_implicitconv_flag(n));
	}
	emit_action_code(n, setf->code, tm);
	Delete(tm);
      } else {
	Swig_warning(WARN_TYPEMAP_VARIN_UNDEF, input_file, line_number, "Unable to set variable of type %s.\n", SwigType_str(t, 0));
      }
      Append(setf->code, "fail:\n");
      Printf(setf->code, "return octave_value_list();\n");
    } else {
      Printf(setf->code, "return octave_set_immutable(args,nargout);");
    }
    Append(setf->code, "}\n");
    Wrapper_print(setf, f_wrappers);

    Setattr(n, "wrap:name", getname);
    int addfail = 0;
    Printf(getf->def, "static octave_value_list _wrap_%s(const octave_value_list& args,int nargout) {", getname);
    Wrapper_add_local(getf, "obj", "octave_value obj");
    if ((tm = Swig_typemap_lookup("varout", n, name, 0))) {
      Replaceall(tm, "$source", name);
      Replaceall(tm, "$target", "obj");
      Replaceall(tm, "$result", "obj");
      addfail = emit_action_code(n, getf->code, tm);
      Delete(tm);
    } else {
      Swig_warning(WARN_TYPEMAP_VAROUT_UNDEF, input_file, line_number, "Unable to read variable of type %s\n", SwigType_str(t, 0));
    }
    Append(getf->code, "  return obj;\n");
    if (addfail) {
      Append(getf->code, "fail:\n");
      Append(getf->code, "  return octave_value_list();\n");
    }
    Append(getf->code, "}\n");
    Wrapper_print(getf, f_wrappers);

    Printf(s_global_tab, "{\"%s\",0,_wrap_%s,_wrap_%s,2,0},\n", iname, getname, setname);

    return SWIG_OK;
  }

  virtual int constantWrapper(Node *n) {
    String *name = Getattr(n, "name");
    String *iname = Getattr(n, "sym:name");
    SwigType *type = Getattr(n, "type");
    String *rawval = Getattr(n, "rawval");
    String *value = rawval ? rawval : Getattr(n, "value");
    String *tm;

    if (!addSymbol(iname, n))
      return SWIG_ERROR;

    if (SwigType_type(type) == T_MPOINTER) {
      String *wname = Swig_name_wrapper(iname);
      String *str = SwigType_str(type, wname);
      Printf(f_header, "static %s = %s;\n", str, value);
      Delete(str);
      value = wname;
    }
    if ((tm = Swig_typemap_lookup("constcode", n, name, 0))) {
      Replaceall(tm, "$source", value);
      Replaceall(tm, "$target", name);
      Replaceall(tm, "$value", value);
      Replaceall(tm, "$nsname", iname);
      Printf(f_init, "%s\n", tm);
    } else {
      Swig_warning(WARN_TYPEMAP_CONST_UNDEF, input_file, line_number, "Unsupported constant value.\n");
      return SWIG_NOWRAP;
    }

    return SWIG_OK;
  }

  virtual int nativeWrapper(Node *n) {
    return Language::nativeWrapper(n);
  }

  virtual int enumDeclaration(Node *n) {
    return Language::enumDeclaration(n);
  }

  virtual int enumvalueDeclaration(Node *n) {
    return Language::enumvalueDeclaration(n);
  }

  virtual int classDeclaration(Node *n) {
    return Language::classDeclaration(n);
  }

  virtual int classHandler(Node *n) {
    have_constructor = 0;
    have_destructor = 0;
    constructor_name = 0;

    class_name = Getattr(n, "sym:name");

    if (!addSymbol(class_name, n))
      return SWIG_ERROR;

    // This is a bug, due to the fact that swig_type -> octave_class mapping
    // is 1-to-n.
    static Hash *emitted = NewHash();
    String *mangled_classname = Swig_name_mangle(Getattr(n, "name"));
    if (Getattr(emitted, mangled_classname)) {
      Delete(mangled_classname);
      return SWIG_NOWRAP;
    }
    Setattr(emitted, mangled_classname, "1");
    Delete(mangled_classname);

    assert(!s_members_tab);
    s_members_tab = NewString("");
    Printv(s_members_tab, "static swig_octave_member swig_", class_name, "_members[] = {\n", NIL);

    Language::classHandler(n);

    SwigType *t = Copy(Getattr(n, "name"));
    SwigType_add_pointer(t);

    String *wrap_class = NewStringf("&_wrap_class_%s", class_name);
    SwigType_remember_clientdata(t, wrap_class);

    int use_director = Swig_directorclass(n);
    if (use_director) {
      String *disown_shadow = NewString("");
      Printf(disown_shadow, "static octave_value_list _wrap_disown_%s_shadow " "(const octave_value_list& args, int nargout) {\n", class_name);
      Printf(disown_shadow, "  if (args.length()!=1) {\n");
      Printf(disown_shadow, "    error(\"disown takes no arguments\");\n");
      Printf(disown_shadow, "    return octave_value_list();\n");
      Printf(disown_shadow, "  }\n");
      Printf(disown_shadow, "  _wrap_disown_%s (args, nargout);\n", class_name);
      Printf(disown_shadow, "  return args;\n");
      Printf(disown_shadow, "}\n");
      Printv(f_wrappers, disown_shadow, NIL);
      Delete(disown_shadow);
      Printf(s_members_tab, "{\"__disown\",_wrap_disown_%s_shadow,0,0,0,0},\n", class_name);
    }

    Printf(s_members_tab, "{0,0,0,0}\n};\n");
    Printv(f_wrappers, s_members_tab, NIL);

    String *base_class_names = NewString("");
    String *base_class = NewString("");
    List *baselist = Getattr(n, "bases");
    if (baselist && Len(baselist)) {
      Iterator b;
      int index = 0;
      b = First(baselist);
      while (b.item) {
	String *bname = Getattr(b.item, "name");
	if ((!bname) || GetFlag(b.item, "feature:ignore") || (!Getattr(b.item, "module"))) {
	  b = Next(b);
	  continue;
	}

	String *bname_mangled = SwigType_manglestr(SwigType_add_pointer(Copy(bname)));
	Printf(base_class_names, "\"%s\",", bname_mangled);
	Printf(base_class, "0,");
	b = Next(b);
	index++;
	Delete(bname_mangled);
      }
    }

    Printv(f_wrappers, "static const char *swig_", class_name, "_base_names[] = {", base_class_names, "0};\n", NIL);
    Printv(f_wrappers, "static const swig_type_info *swig_", class_name, "_base[] = {", base_class, "0};\n", NIL);
    Printv(f_wrappers, "static swig_octave_class _wrap_class_", class_name, " = {\"", class_name, "\", &SWIGTYPE", SwigType_manglestr(t), ",", NIL);
    Printv(f_wrappers, Swig_directorclass(n) ? "1," : "0,", NIL);
    if (have_constructor) {
      String *cname = Swig_name_construct(constructor_name);
      String *wcname = Swig_name_wrapper(cname);
      String *tname = texinfo_name(n);
      Printf(f_wrappers, "%s,%s,", wcname, tname);
      Delete(tname);
      Delete(wcname);
      Delete(cname);
    } else
      Printv(f_wrappers, "0,0,", NIL);
    if (have_destructor)
      Printv(f_wrappers, "_wrap_delete_", class_name, ",", NIL);
    else
      Printv(f_wrappers, "0", ",", NIL);
    Printf(f_wrappers, "swig_%s_members,swig_%s_base_names,swig_%s_base };\n\n", class_name, class_name, class_name);

    Delete(base_class);
    Delete(base_class_names);
    Delete(t);
    Delete(s_members_tab);
    s_members_tab = 0;
    class_name = 0;

    return SWIG_OK;
  }

  virtual int memberfunctionHandler(Node *n) {
    Language::memberfunctionHandler(n);

    assert(s_members_tab);
    assert(class_name);
    String *name = Getattr(n, "name");
    String *iname = GetChar(n, "sym:name");
    String *realname = iname ? iname : name;
    String *rname = Swig_name_wrapper(Swig_name_member(class_name, realname));

    if (!Getattr(n, "sym:nextSibling")) {
      String *tname = texinfo_name(n);
      Printf(s_members_tab, "{\"%s\",%s,0,0,0,%s},\n", 
	     realname, rname, tname);
      Delete(tname);
    }

    Delete(rname);
    return SWIG_OK;
  }

  virtual int membervariableHandler(Node *n) {
    Setattr(n, "feature:autodoc", "0");

    Language::membervariableHandler(n);

    assert(s_members_tab);
    assert(class_name);
    String *symname = Getattr(n, "sym:name");
    String *getname = Swig_name_wrapper(Swig_name_get(Swig_name_member(class_name, symname)));
    String *setname = GetFlag(n, "feature:immutable") ?
	NewString("octave_set_immutable") : Swig_name_wrapper(Swig_name_set(Swig_name_member(class_name, symname)));
    assert(s_members_tab);

    Printf(s_members_tab, "{\"%s\",0,%s,%s,0,0},\n", symname, getname, setname);

    Delete(getname);
    Delete(setname);
    return SWIG_OK;
  }

  virtual int constructorHandler(Node *n) {
    have_constructor = 1;
    if (!constructor_name)
      constructor_name = NewString(Getattr(n, "sym:name"));

    int use_director = Swig_directorclass(n);
    if (use_director) {
      Parm *parms = Getattr(n, "parms");
      Parm *self;
      String *name = NewString("self");
      String *type = NewString("void");
      SwigType_add_pointer(type);
      self = NewParm(type, name);
      Delete(type);
      Delete(name);
      Setattr(self, "lname", "self_obj");
      if (parms)
	set_nextSibling(self, parms);
      Setattr(n, "parms", self);
      Setattr(n, "wrap:self", "1");
      Setattr(n, "hidden", "1");
      Delete(self);
    }

    return Language::constructorHandler(n);;
  }

  virtual int destructorHandler(Node *n) {
    have_destructor = 1;
    return Language::destructorHandler(n);;
  }

  virtual int staticmemberfunctionHandler(Node *n) {
    Language::staticmemberfunctionHandler(n);

    assert(s_members_tab);
    assert(class_name);
    String *name = Getattr(n, "name");
    String *iname = GetChar(n, "sym:name");
    String *realname = iname ? iname : name;
    String *rname = Swig_name_wrapper(Swig_name_member(class_name, realname));

    if (!Getattr(n, "sym:nextSibling")) {
      String *tname = texinfo_name(n);
      Printf(s_members_tab, "{\"%s\",%s,0,0,1,%s},\n", 
	     realname, rname, tname);
      Delete(tname);
    }
    
    Delete(rname);
    return SWIG_OK;
  }

  virtual int memberconstantHandler(Node *n) {
    return Language::memberconstantHandler(n);
  }

  virtual int staticmembervariableHandler(Node *n) {
    Setattr(n, "feature:autodoc", "0");

    Language::staticmembervariableHandler(n);

    if (!GetFlag(n, "wrappedasconstant")) {
      assert(s_members_tab);
      assert(class_name);
      String *symname = Getattr(n, "sym:name");
      String *getname = Swig_name_wrapper(Swig_name_get(Swig_name_member(class_name, symname)));
      String *setname = GetFlag(n, "feature:immutable") ?
	  NewString("octave_set_immutable") : Swig_name_wrapper(Swig_name_set(Swig_name_member(class_name, symname)));
      assert(s_members_tab);

      Printf(s_members_tab, "{\"%s\",0,%s,%s,1,0},\n", symname, getname, setname);

      Delete(getname);
      Delete(setname);
    }
    return SWIG_OK;
  }

  int classDirectorInit(Node *n) {
    String *declaration = Swig_director_declaration(n);
    Printf(f_directors_h, "\n");
    Printf(f_directors_h, "%s\n", declaration);
    Printf(f_directors_h, "public:\n");
    Delete(declaration);
    return Language::classDirectorInit(n);
  }

  int classDirectorEnd(Node *n) {
    Printf(f_directors_h, "};\n\n");
    return Language::classDirectorEnd(n);
  }

  int classDirectorConstructor(Node *n) {
    Node *parent = Getattr(n, "parentNode");
    String *sub = NewString("");
    String *decl = Getattr(n, "decl");
    String *supername = Swig_class_name(parent);
    String *classname = NewString("");
    Printf(classname, "SwigDirector_%s", supername);

    // insert self parameter
    Parm *p;
    ParmList *superparms = Getattr(n, "parms");
    ParmList *parms = CopyParmList(superparms);
    String *type = NewString("void");
    SwigType_add_pointer(type);
    p = NewParm(type, NewString("self"));
    set_nextSibling(p, parms);
    parms = p;

    if (!Getattr(n, "defaultargs")) {
      // constructor
      {
	Wrapper *w = NewWrapper();
	String *call;
	String *basetype = Getattr(parent, "classtype");
	String *target = Swig_method_decl(0, decl, classname, parms, 0, 0);
	call = Swig_csuperclass_call(0, basetype, superparms);
	Printf(w->def, "%s::%s: %s," "\nSwig::Director(static_cast<%s*>(this)) { \n", classname, target, call, basetype);
	Append(w->def, "}\n");
	Delete(target);
	Wrapper_print(w, f_directors);
	Delete(call);
	DelWrapper(w);
      }

      // constructor header
      {
	String *target = Swig_method_decl(0, decl, classname, parms, 0, 1);
	Printf(f_directors_h, "    %s;\n", target);
	Delete(target);
      }
    }

    Delete(sub);
    Delete(classname);
    Delete(supername);
    Delete(parms);
    return Language::classDirectorConstructor(n);
  }

  int classDirectorDefaultConstructor(Node *n) {
    String *classname = Swig_class_name(n);
    {
      Wrapper *w = NewWrapper();
      Printf(w->def, "SwigDirector_%s::SwigDirector_%s(void* self) :"
	     "\nSwig::Director((octave_swig_type*)self,static_cast<%s*>(this)) { \n", classname, classname, classname);
      Append(w->def, "}\n");
      Wrapper_print(w, f_directors);
      DelWrapper(w);
    }
    Printf(f_directors_h, "    SwigDirector_%s(octave_swig_type* self);\n", classname);
    Delete(classname);
    return Language::classDirectorDefaultConstructor(n);
  }

  int classDirectorMethod(Node *n, Node *parent, String *super) {
    int is_void = 0;
    int is_pointer = 0;
    String *decl;
    String *type;
    String *name;
    String *classname;
    String *c_classname = Getattr(parent, "name");
    String *declaration;
    ParmList *l;
    Wrapper *w;
    String *tm;
    String *wrap_args = NewString("");
    String *return_type;
    String *value = Getattr(n, "value");
    String *storage = Getattr(n, "storage");
    bool pure_virtual = false;
    int status = SWIG_OK;
    int idx;
    bool ignored_method = GetFlag(n, "feature:ignore") ? true : false;

    if (Cmp(storage, "virtual") == 0) {
      if (Cmp(value, "0") == 0) {
	pure_virtual = true;
      }
    }

    classname = Getattr(parent, "sym:name");
    type = Getattr(n, "type");
    name = Getattr(n, "name");

    w = NewWrapper();
    declaration = NewString("");

    // determine if the method returns a pointer
    decl = Getattr(n, "decl");
    is_pointer = SwigType_ispointer_return(decl);
    is_void = (!Cmp(type, "void") && !is_pointer);

    // form complete return type
    return_type = Copy(type);
    {
      SwigType *t = Copy(decl);
      SwigType *f = 0;
      f = SwigType_pop_function(t);
      SwigType_push(return_type, t);
      Delete(f);
      Delete(t);
    }

    // virtual method definition
    l = Getattr(n, "parms");
    String *target;
    String *pclassname = NewStringf("SwigDirector_%s", classname);
    String *qualified_name = NewStringf("%s::%s", pclassname, name);
    SwigType *rtype = Getattr(n, "conversion_operator") ? 0 : type;
    target = Swig_method_decl(rtype, decl, qualified_name, l, 0, 0);
    Printf(w->def, "%s", target);
    Delete(qualified_name);
    Delete(target);

    // header declaration
    target = Swig_method_decl(rtype, decl, name, l, 0, 1);
    Printf(declaration, "    virtual %s", target);
    Delete(target);

    // Get any exception classes in the throws typemap
    ParmList *throw_parm_list = 0;

    if ((throw_parm_list = Getattr(n, "throws")) || Getattr(n, "throw")) {
      Parm *p;
      int gencomma = 0;

      Append(w->def, " throw(");
      Append(declaration, " throw(");

      if (throw_parm_list)
	Swig_typemap_attach_parms("throws", throw_parm_list, 0);
      for (p = throw_parm_list; p; p = nextSibling(p)) {
	if ((tm = Getattr(p, "tmap:throws"))) {
	  if (gencomma++) {
	    Append(w->def, ", ");
	    Append(declaration, ", ");
	  }
	  String *str = SwigType_str(Getattr(p, "type"), 0);
	  Append(w->def, str);
	  Append(declaration, str);
	  Delete(str);
	}
      }

      Append(w->def, ")");
      Append(declaration, ")");
    }

    Append(w->def, " {");
    Append(declaration, ";\n");

    // declare method return value 
    // if the return value is a reference or const reference, a specialized typemap must
    // handle it, including declaration of c_result ($result).
    if (!is_void) {
      if (!(ignored_method && !pure_virtual)) {
	String *cres = SwigType_lstr(return_type, "c_result");
	Printf(w->code, "%s;\n", cres);
	Delete(cres);
      }
    }

    if (ignored_method) {
      if (!pure_virtual) {
	if (!is_void)
	  Printf(w->code, "return ");
	String *super_call = Swig_method_call(super, l);
	Printf(w->code, "%s;\n", super_call);
	Delete(super_call);
      } else {
	Printf(w->code, "Swig::DirectorPureVirtualException::raise(\"Attempted to invoke pure virtual method %s::%s\");\n", SwigType_namestr(c_classname),
	       SwigType_namestr(name));
      }
    } else {
      // attach typemaps to arguments (C/C++ -> Python)
      String *parse_args = NewString("");

      Swig_typemap_attach_parms("in", l, 0);
      Swig_typemap_attach_parms("directorin", l, 0);
      Swig_typemap_attach_parms("directorargout", l, w);

      Parm *p;

      int outputs = 0;
      if (!is_void)
	outputs++;

      // build argument list and type conversion string
      idx = 0;
      p = l;
      int use_parse = 0;
      while (p != NULL) {
	if (checkAttribute(p, "tmap:in:numinputs", "0")) {
	  p = Getattr(p, "tmap:in:next");
	  continue;
	}

	if (Getattr(p, "tmap:directorargout") != 0)
	  outputs++;

	String *pname = Getattr(p, "name");
	String *ptype = Getattr(p, "type");
	Wrapper_add_local(w, "tmpv", "octave_value tmpv");

	if ((tm = Getattr(p, "tmap:directorin")) != 0) {
	  String *parse = Getattr(p, "tmap:directorin:parse");
	  if (!parse) {
	    Replaceall(tm, "$input", "tmpv");
	    Replaceall(tm, "$owner", "0");
	    Printv(wrap_args, tm, "\n", NIL);
	    Printf(wrap_args, "args.append(tmpv);\n");
	    Putc('O', parse_args);
	  } else {
	    use_parse = 1;
	    Append(parse_args, parse);
	    Replaceall(tm, "$input", pname);
	    Replaceall(tm, "$owner", "0");
	    if (Len(tm) == 0)
	      Append(tm, pname);
	  }
	  p = Getattr(p, "tmap:directorin:next");
	  continue;
	} else if (Cmp(ptype, "void")) {
	  Swig_warning(WARN_TYPEMAP_DIRECTORIN_UNDEF, input_file, line_number,
		       "Unable to use type %s as a function argument in director method %s::%s (skipping method).\n", SwigType_str(ptype, 0),
		       SwigType_namestr(c_classname), SwigType_namestr(name));
	  status = SWIG_NOWRAP;
	  break;
	}
	p = nextSibling(p);
      }

      String *method_name = Getattr(n, "sym:name");

      Printv(w->code, wrap_args, NIL);

      // emit method invocation
      Wrapper_add_local(w, "args", "octave_value_list args");
      Wrapper_add_local(w, "out", "octave_value_list out");
      Wrapper_add_local(w, "idx", "std::list<octave_value_list> idx");
      Printf(w->code, "idx.push_back(octave_value_list(\"%s\"));\n", method_name);
      Printf(w->code, "idx.push_back(args);\n");
      Printf(w->code, "out=swig_get_self()->subsref(\".(\",idx,%d);\n", outputs);

      String *cleanup = NewString("");
      String *outarg = NewString("");
      idx = 0;

      // marshal return value
      if (!is_void) {
	Printf(w->code, "if (out.length()<%d) {\n", outputs);
	Printf(w->code, "Swig::DirectorTypeMismatchException::raise(\"Octave "
	       "method %s.%s failed to return the required number " "of arguments.\");\n", classname, method_name);
	Printf(w->code, "}\n");

	Setattr(n, "type", return_type);
	tm = Swig_typemap_lookup("directorout", n, "result", w);
	Setattr(n, "type", type);
	if (tm == 0) {
	  String *name = NewString("result");
	  tm = Swig_typemap_search("directorout", return_type, name, NULL);
	  Delete(name);
	}
	if (tm != 0) {
	  char temp[24];
	  sprintf(temp, "out(%d)", idx);
	  Replaceall(tm, "$input", temp);
	  //    Replaceall(tm, "$argnum", temp);
	  Replaceall(tm, "$disown", Getattr(n, "wrap:disown") ? "SWIG_POINTER_DISOWN" : "0");
	  if (Getattr(n, "tmap:directorout:implicitconv")) {
	    Replaceall(tm, "$implicitconv", get_implicitconv_flag(n));
	  }
	  Replaceall(tm, "$result", "c_result");
	  Printv(w->code, tm, "\n", NIL);
	  Delete(tm);
	} else {
	  Swig_warning(WARN_TYPEMAP_DIRECTOROUT_UNDEF, input_file, line_number,
		       "Unable to use return type %s in director method %s::%s (skipping method).\n",
		       SwigType_str(return_type, 0), SwigType_namestr(c_classname), SwigType_namestr(name));
	  status = SWIG_ERROR;
	}
      }
      idx++;

      // marshal outputs
      for (p = l; p;) {
	if ((tm = Getattr(p, "tmap:directorargout")) != 0) {
	  char temp[24];
	  sprintf(temp, "out(%d)", idx);
	  Replaceall(tm, "$input", temp);
	  Replaceall(tm, "$result", Getattr(p, "name"));
	  Printv(w->code, tm, "\n", NIL);
	  p = Getattr(p, "tmap:directorargout:next");
	} else {
	  p = nextSibling(p);
	}
      }

      Delete(parse_args);
      Delete(cleanup);
      Delete(outarg);
    }

    if (!is_void) {
      if (!(ignored_method && !pure_virtual)) {
	String *rettype = SwigType_str(return_type, 0);
	if (!SwigType_isreference(return_type)) {
	  Printf(w->code, "return (%s) c_result;\n", rettype);
	} else {
	  Printf(w->code, "return (%s) *c_result;\n", rettype);
	}
	Delete(rettype);
      }
    }

    Append(w->code, "}\n");

    // We expose protected methods via an extra public inline method which makes a straight call to the wrapped class' method
    String *inline_extra_method = NewString("");
    if (dirprot_mode() && !is_public(n) && !pure_virtual) {
      Printv(inline_extra_method, declaration, NIL);
      String *extra_method_name = NewStringf("%sSwigPublic", name);
      Replaceall(inline_extra_method, name, extra_method_name);
      Replaceall(inline_extra_method, ";\n", " {\n      ");
      if (!is_void)
	Printf(inline_extra_method, "return ");
      String *methodcall = Swig_method_call(super, l);
      Printv(inline_extra_method, methodcall, ";\n    }\n", NIL);
      Delete(methodcall);
      Delete(extra_method_name);
    }
    // emit the director method
    if (status == SWIG_OK) {
      if (!Getattr(n, "defaultargs")) {
	Wrapper_print(w, f_directors);
	Printv(f_directors_h, declaration, NIL);
	Printv(f_directors_h, inline_extra_method, NIL);
      }
    }
    // clean up
    Delete(wrap_args);
    Delete(return_type);
    Delete(pclassname);
    DelWrapper(w);
    return status;
  }

  String *runtimeCode() {
    String *s = NewString("");
    String *srun = Swig_include_sys("octrun.swg");
    if (!srun) {
      Printf(stderr, "*** Unable to open 'octrun.swg'\n");
    } else {
      Append(s, srun);
      Delete(srun);
    }
    return s;
  }

  String *defaultExternalRuntimeFilename() {
    return NewString("swigoctaverun.h");
  }
};

extern "C" Language *swig_octave(void) {
  return new OCTAVE();
}