pidl/python: Specify memory context explicitly when returning Python objects.
[ira/wip.git] / source / pidl / lib / Parse / Pidl / Samba4 / Python.pm
1 ###################################################
2 # Python function wrapper generator
3 # Copyright jelmer@samba.org 2007-2008
4 # released under the GNU GPL
5
6 package Parse::Pidl::Samba4::Python;
7
8 use Exporter;
9 @ISA = qw(Exporter);
10
11 use strict;
12 use Parse::Pidl::Typelist qw(hasType getType mapTypeName expandAlias);
13 use Parse::Pidl::Util qw(has_property ParseExpr);
14 use Parse::Pidl::NDR qw(GetPrevLevel GetNextLevel ContainsDeferred is_charset_array);
15 use Parse::Pidl::CUtil qw(get_value_of get_pointer_to);
16 use Parse::Pidl::Samba4::Header qw(GenerateFunctionInEnv GenerateFunctionOutEnv EnvSubstituteValue GenerateStructEnv);
17
18 use vars qw($VERSION);
19 $VERSION = '0.01';
20
21 sub new($) {
22         my ($class) = @_;
23         my $self = { res => "", res_hdr => "", tabs => "", constants => {},
24                      module_methods => []};
25         bless($self, $class);
26 }
27
28 sub pidl_hdr ($$)
29 {
30         my $self = shift;
31         $self->{res_hdr} .= shift;
32 }
33
34 sub pidl($$)
35 {
36         my ($self, $d) = @_;
37         if ($d) {
38                 $self->{res} .= $self->{tabs};
39                 $self->{res} .= $d;
40         }
41         $self->{res} .= "\n";
42 }
43
44 sub indent($)
45 {
46         my ($self) = @_;
47         $self->{tabs} .= "\t";
48 }
49
50 sub deindent($)
51 {
52         my ($self) = @_;
53         $self->{tabs} = substr($self->{tabs}, 0, -1);
54 }
55
56 sub Import
57 {
58         my $self = shift;
59         my @imports = @_;
60         foreach (@imports) {
61                 s/\.idl\"$//;
62                 s/^\"//;
63                 $self->pidl_hdr("#include \"librpc/gen_ndr/py_$_\.h\"\n");
64         }
65 }
66
67 sub Const($$)
68 {
69     my ($self, $const) = @_;
70         $self->register_constant($const->{NAME}, $const->{DTYPE}, $const->{VALUE});
71 }
72
73 sub register_constant($$$$)
74 {
75         my ($self, $name, $type, $value) = @_;
76
77         $self->{constants}->{$name} = [$type, $value];
78 }
79
80 sub EnumAndBitmapConsts($$$)
81 {
82         my ($self, $name, $d) = @_;
83
84         return unless (defined($d->{ELEMENTS}));
85
86         foreach my $e (@{$d->{ELEMENTS}}) {
87                 $e =~ /^([A-Za-z0-9_]+)=(.*)$/;
88                 my $cname = $1;
89                 
90                 $self->register_constant($cname, $d, $cname);
91         }
92 }
93
94 sub FromUnionToPythonFunction($$$$)
95 {
96         my ($self, $mem_ctx, $type, $switch, $name) = @_;
97
98         $self->pidl("PyObject *ret;");
99         $self->pidl("");
100
101         $self->pidl("switch ($switch) {");
102         $self->indent;
103
104         foreach my $e (@{$type->{ELEMENTS}}) {
105                 if (defined($e->{CASE})) {
106                         $self->pidl("$e->{CASE}:");
107                 } else {
108                         $self->pidl("default:");
109                 }
110
111                 $self->indent;
112
113                 if ($e->{NAME}) {
114                         $self->ConvertObjectToPython($mem_ctx, {}, $e, "$name->$e->{NAME}", "ret");
115                 } else {
116                         $self->pidl("ret = Py_None;");
117                 }
118
119                 $self->pidl("return ret;");
120                 $self->pidl("");
121
122                 $self->deindent;
123         }
124
125         $self->deindent;
126         $self->pidl("}");
127
128         $self->pidl("PyErr_SetString(PyExc_TypeError, \"unknown union level\");");
129         $self->pidl("return NULL;");
130 }
131
132 sub FromPythonToUnionFunction($$$$$)
133 {
134         my ($self, $type, $typename, $switch, $mem_ctx, $name) = @_;
135
136         my $has_default = 0;
137
138         $self->pidl("$typename *ret = talloc_zero($mem_ctx, $typename);");
139
140         $self->pidl("switch ($switch) {");
141         $self->indent;
142
143         foreach my $e (@{$type->{ELEMENTS}}) {
144                 if (defined($e->{CASE})) {
145                         $self->pidl("$e->{CASE}:");
146                 } else {
147                         $has_default = 1;
148                         $self->pidl("default:");
149                 }
150                 $self->indent;
151                 if ($e->{NAME}) {
152                         $self->ConvertObjectFromPython({}, $mem_ctx, $e, $name, "ret->$e->{NAME}", "talloc_free(ret); return NULL;");
153                 }
154                 $self->pidl("break;");
155                 $self->deindent;
156                 $self->pidl("");
157         }
158
159         if (!$has_default) {
160                 $self->pidl("default:");
161                 $self->indent;
162                 $self->pidl("PyErr_SetString(PyExc_TypeError, \"invalid union level value\");");
163                 $self->pidl("talloc_free(ret);");
164                 $self->pidl("ret = NULL;");
165                 $self->deindent;
166         }
167
168         $self->deindent;
169         $self->pidl("}");
170         $self->pidl("");
171         $self->pidl("return ret;");
172 }
173
174 sub PythonStruct($$$$)
175 {
176         my ($self, $name, $cname, $d) = @_;
177
178         my $env = GenerateStructEnv($d, "object");
179
180         $self->pidl("");
181
182         $self->pidl("static PyObject *py_$name\_getattr(PyObject *obj, char *name)");
183         $self->pidl("{");
184         $self->indent;
185         $self->pidl("$cname *object = py_talloc_get_ptr(obj);");
186         foreach my $e (@{$d->{ELEMENTS}}) {
187                 $self->pidl("if (!strcmp(name, \"$e->{NAME}\")) {");
188                 my $varname = "object->$e->{NAME}";
189                 $self->indent;
190                 $self->pidl("PyObject *py_$e->{NAME};");
191                 $self->ConvertObjectToPython("py_talloc_get_talloc_ctx(obj)", $env, $e, $varname, "py_$e->{NAME}");
192                 $self->pidl("return py_$e->{NAME};");
193                 $self->deindent;
194                 $self->pidl("}");
195         }
196         $self->pidl("PyErr_SetString(PyExc_AttributeError, \"no such attribute\");");
197         $self->pidl("return NULL;");
198         $self->deindent;
199         $self->pidl("}");
200         $self->pidl("");
201
202         $self->pidl("static int py_$name\_setattr(PyObject *py_obj, char *name, PyObject *value)");
203         $self->pidl("{");
204         $self->indent;
205         $self->pidl("$cname *object = py_talloc_get_ptr(py_obj);");
206         my $mem_ctx = "py_talloc_get_mem_ctx(py_obj)";
207         foreach my $e (@{$d->{ELEMENTS}}) {
208                 $self->pidl("if (!strcmp(name, \"$e->{NAME}\")) {");
209                 my $varname = "object->$e->{NAME}";
210                 $self->indent;
211                 if ($e->{ORIGINAL}->{POINTERS} > 0) {
212                         $self->pidl("talloc_free($varname);");
213                 }
214                 $self->ConvertObjectFromPython($env, $mem_ctx, $e, "value", $varname, "return -1;");
215                 $self->pidl("return 0;");
216                 $self->deindent;
217                 $self->pidl("}");
218         }
219         $self->pidl("PyErr_SetString(PyExc_AttributeError, \"no such attribute\");");
220         $self->pidl("return -1;");
221         $self->deindent;
222         $self->pidl("}");
223         $self->pidl("");
224
225         $self->pidl_hdr("PyAPI_DATA(PyTypeObject) $name\_Type;\n");
226         $self->pidl_hdr("#define $name\_Check(op) PyObject_TypeCheck(op, &$name\_Type)\n");
227         $self->pidl_hdr("#define $name\_CheckExact(op) ((op)->ob_type == &$name\_Type)\n");
228         $self->pidl_hdr("\n");
229         $self->pidl("PyTypeObject $name\_Type = {");
230         $self->indent;
231         $self->pidl("PyObject_HEAD_INIT(NULL) 0,");
232         $self->pidl(".tp_name = \"$name\",");
233         $self->pidl(".tp_basicsize = sizeof(py_talloc_Object),");
234         $self->pidl(".tp_dealloc = py_talloc_dealloc,");
235         $self->pidl(".tp_getattr = py_$name\_getattr,");
236         $self->pidl(".tp_setattr = py_$name\_setattr,");
237         $self->pidl(".tp_repr = py_talloc_default_repr,");
238         $self->deindent;
239         $self->pidl("};");
240
241         $self->pidl("");
242
243         my $py_fnname = "py_$name";
244         $self->pidl("static PyObject *$py_fnname(PyObject *self, PyObject *args)");
245         $self->pidl("{");
246         $self->indent;
247         $self->pidl("$cname *ret = talloc_zero(NULL, $cname);");
248         $self->pidl("return py_talloc_import(&$name\_Type, ret);");
249         $self->deindent;
250         $self->pidl("}");
251         $self->pidl("");
252
253         return $py_fnname;
254 }
255
256 sub PythonFunction($$$)
257 {
258         my ($self, $fn, $iface) = @_;
259
260         $self->pidl("static PyObject *py_$fn->{NAME}(PyObject *self, PyObject *args, PyObject *kwargs)");
261         $self->pidl("{");
262         $self->indent;
263         $self->pidl("$iface\_InterfaceObject *iface = ($iface\_InterfaceObject *)self;");
264         $self->pidl("NTSTATUS status;");
265         $self->pidl("TALLOC_CTX *mem_ctx = talloc_new(NULL);");
266         $self->pidl("struct $fn->{NAME} *r = talloc_zero(mem_ctx, struct $fn->{NAME});");
267         $self->pidl("PyObject *result = Py_None;");
268         
269         my $env = GenerateFunctionInEnv($fn, "r->");
270         my $result_size = 0;
271
272         my $args_format = "";
273         my $args_string = "";
274         my $args_names = "";
275
276         foreach my $e (@{$fn->{ELEMENTS}}) {
277                 $self->pidl("PyObject *py_$e->{NAME};");
278                 if (grep(/out/,@{$e->{DIRECTION}})) {
279                         $result_size++;
280                 }
281                 if (grep(/in/,@{$e->{DIRECTION}})) {
282                         $args_format .= "O";
283                         $args_string .= ", &py_$e->{NAME}";
284                         $args_names .= "\"$e->{NAME}\", ";
285                 }
286         }
287         $self->pidl("const char *kwnames[] = {");
288         $self->indent;
289         $self->pidl($args_names . "NULL");
290         $self->deindent;
291         $self->pidl("};");
292
293         $self->pidl("");
294         $self->pidl("if (!PyArg_ParseTupleAndKeywords(args, kwargs, \"$args_format:$fn->{NAME}\", discard_const_p(char *, kwnames)$args_string)) {");
295         $self->indent;
296         $self->pidl("return NULL;");
297         $self->deindent;
298         $self->pidl("}");
299
300         if ($fn->{RETURN_TYPE}) {
301                 $result_size++;
302         }
303
304         foreach my $e (@{$fn->{ELEMENTS}}) {
305                 if (grep(/in/,@{$e->{DIRECTION}})) {
306                         $self->ConvertObjectFromPython($env, "mem_ctx", $e, "py_$e->{NAME}", "r->in.$e->{NAME}", "talloc_free(mem_ctx); return NULL;");
307                 }
308         }
309         $self->pidl("status = dcerpc_$fn->{NAME}(iface->pipe, mem_ctx, r);");
310         $self->handle_ntstatus("status", "NULL", "mem_ctx");
311
312         $env = GenerateFunctionOutEnv($fn, "r->");
313         my $i = 0;
314
315         if ($result_size > 1) {
316                 $self->pidl("result = PyTuple_New($result_size);");
317         }
318
319         foreach my $e (@{$fn->{ELEMENTS}}) {
320                 my $py_name = "py_$e->{NAME}";
321                 if (grep(/out/,@{$e->{DIRECTION}})) {
322                         $self->ConvertObjectToPython("r", $env, $e, "r->out.$e->{NAME}", $py_name);
323                         if ($result_size > 1) {
324                                 $self->pidl("PyTuple_SetItem(result, $i, $py_name);");
325                                 $i++;
326                         } else {
327                                 $self->pidl("result = $py_name;");
328                         }
329                 }
330         }
331
332         if (defined($fn->{RETURN_TYPE})) {
333                 my $conv = $self->ConvertObjectToPythonData("r", $fn->{RETURN_TYPE}, "r->out.result");
334                 if ($result_size > 1) {
335                         $self->pidl("PyTuple_SetItem(result, $i, $conv);");
336                 } else {
337                         $self->pidl("result = $conv;");
338                 }
339         }
340
341         $self->pidl("talloc_free(mem_ctx);");
342         $self->pidl("return result;");
343         $self->deindent;
344         $self->pidl("}");
345         $self->pidl("");
346 }
347
348 sub handle_ntstatus($$$$)
349 {
350         my ($self, $var, $retval, $mem_ctx) = @_;
351
352         $self->pidl("if (NT_STATUS_IS_ERR($var)) {");
353         $self->indent;
354         $self->pidl("PyErr_SetString(PyExc_RuntimeError, nt_errstr($var));");
355         $self->pidl("talloc_free($mem_ctx);") if ($mem_ctx);
356         $self->pidl("return $retval;");
357         $self->deindent;
358         $self->pidl("}");
359         $self->pidl("");
360 }
361
362 sub PythonType($$$)
363 {
364         my ($self, $d, $interface, $basename) = @_;
365
366         my $actual_ctype = $d;
367         if ($actual_ctype->{TYPE} eq "TYPEDEF") {
368                 $actual_ctype = $actual_ctype->{DATA};
369         }
370
371         if ($actual_ctype->{TYPE} eq "STRUCT") {
372                 my $py_fnname;
373                 if ($d->{TYPE} eq "STRUCT") {
374                         $py_fnname = $self->PythonStruct($d->{NAME}, mapTypeName($d), $d);
375                 } else {
376                         $py_fnname = $self->PythonStruct($d->{NAME}, mapTypeName($d), $d->{DATA});
377                 }
378
379                 my $fn_name = $d->{NAME};
380
381                 $fn_name =~ s/^$interface->{NAME}_//;
382                 $fn_name =~ s/^$basename\_//;
383
384                 $self->register_module_method($fn_name, $py_fnname, "METH_NOARGS", "NULL");
385         }
386
387         if ($d->{TYPE} eq "ENUM" or $d->{TYPE} eq "BITMAP") {
388                 $self->EnumAndBitmapConsts($d->{NAME}, $d);
389         }
390
391         if ($d->{TYPE} eq "TYPEDEF" and ($d->{DATA}->{TYPE} eq "ENUM" or $d->{DATA}->{TYPE} eq "BITMAP")) {
392                 $self->EnumAndBitmapConsts($d->{NAME}, $d->{DATA});
393         }
394
395         if ($actual_ctype->{TYPE} eq "UNION" and defined($actual_ctype->{ELEMENTS})) {
396                 $self->pidl("PyObject *py_import_$d->{NAME}(TALLOC_CTX *mem_ctx, int level, " .mapTypeName($d) . " *in)");
397                 $self->pidl("{");
398                 $self->indent;
399                 $self->FromUnionToPythonFunction("mem_ctx", $actual_ctype, "level", "in") if ($actual_ctype->{TYPE} eq "UNION");
400                 $self->deindent;
401                 $self->pidl("}");
402                 $self->pidl("");
403
404                 $self->pidl(mapTypeName($d) . " *py_export_$d->{NAME}(TALLOC_CTX *mem_ctx, int level, PyObject *in)");
405                 $self->pidl("{");
406                 $self->indent;
407                 $self->FromPythonToUnionFunction($actual_ctype, mapTypeName($d), "level", "mem_ctx", "in") if ($actual_ctype->{TYPE} eq "UNION");
408                 $self->deindent;
409                 $self->pidl("}");
410                 $self->pidl("");
411         }
412 }
413
414 sub Interface($$$)
415 {
416         my($self,$interface,$basename) = @_;
417
418         $self->pidl_hdr("#ifndef _HEADER_PYTHON_$interface->{NAME}\n");
419         $self->pidl_hdr("#define _HEADER_PYTHON_$interface->{NAME}\n\n");
420
421         $self->pidl_hdr("\n");
422
423         $self->Const($_) foreach (@{$interface->{CONSTS}});
424
425         foreach my $d (@{$interface->{TYPES}}) {
426                 next if has_property($d, "nopython");
427
428                 $self->PythonType($d, $interface, $basename);
429         }
430
431         $self->pidl_hdr("PyAPI_DATA(PyTypeObject) $interface->{NAME}_InterfaceType;\n");
432         $self->pidl("typedef struct {");
433         $self->indent;
434         $self->pidl("PyObject_HEAD");
435         $self->pidl("struct dcerpc_pipe *pipe;");
436         $self->deindent;
437         $self->pidl("} $interface->{NAME}_InterfaceObject;");
438
439         $self->pidl("");
440
441         foreach my $d (@{$interface->{FUNCTIONS}}) {
442                 next if not defined($d->{OPNUM});
443                 next if has_property($d, "nopython");
444
445                 $self->PythonFunction($d, $interface->{NAME});
446         }
447
448         $self->pidl("static PyMethodDef interface_$interface->{NAME}\_methods[] = {");
449         $self->indent;
450         foreach my $d (@{$interface->{FUNCTIONS}}) {
451                 next if not defined($d->{OPNUM});
452                 next if has_property($d, "nopython");
453
454                 my $fn_name = $d->{NAME};
455
456                 $fn_name =~ s/^$interface->{NAME}_//;
457                 $fn_name =~ s/^$basename\_//;
458
459                 $self->pidl("{ \"$fn_name\", (PyCFunction)py_$d->{NAME}, METH_VARARGS|METH_KEYWORDS, NULL },");
460         }
461         $self->pidl("{ NULL, NULL, 0, NULL }");
462         $self->deindent;
463         $self->pidl("};");
464         $self->pidl("");
465
466         $self->pidl("static void interface_$interface->{NAME}_dealloc(PyObject* self)");
467         $self->pidl("{");
468         $self->indent;
469         $self->pidl("$interface->{NAME}_InterfaceObject *interface = ($interface->{NAME}_InterfaceObject *)self;");
470         $self->pidl("talloc_free(interface->pipe);");
471         $self->pidl("PyObject_Del(self);");
472         $self->deindent;
473         $self->pidl("}");
474         $self->pidl("");
475
476         $self->pidl("static PyObject *interface_$interface->{NAME}_getattr(PyObject *obj, char *name)");
477         $self->pidl("{");
478         $self->indent;
479         $self->pidl("return Py_FindMethod(interface_$interface->{NAME}\_methods, obj, name);");
480         $self->deindent;
481         $self->pidl("}");
482
483         $self->pidl("");
484
485         $self->pidl("PyTypeObject $interface->{NAME}_InterfaceType = {");
486         $self->indent;
487         $self->pidl("PyObject_HEAD_INIT(NULL) 0,");
488         $self->pidl(".tp_name = \"$interface->{NAME}\",");
489         $self->pidl(".tp_basicsize = sizeof($interface->{NAME}_InterfaceObject),");
490         $self->pidl(".tp_dealloc = interface_$interface->{NAME}_dealloc,");
491         $self->pidl(".tp_getattr = interface_$interface->{NAME}_getattr,");
492         $self->deindent;
493         $self->pidl("};");
494
495         $self->pidl("");
496
497         $self->register_module_method($interface->{NAME}, "interface_$interface->{NAME}", "METH_VARARGS|METH_KEYWORDS", "NULL");
498         $self->pidl("static PyObject *interface_$interface->{NAME}(PyObject *self, PyObject *args, PyObject *kwargs)");
499         $self->pidl("{");
500         $self->indent;
501         $self->pidl("$interface->{NAME}_InterfaceObject *ret;");
502         $self->pidl("const char *binding_string;");
503         $self->pidl("struct cli_credentials *credentials;");
504         $self->pidl("struct loadparm_context *lp_ctx = NULL;");
505         $self->pidl("PyObject *py_lp_ctx = NULL, *py_credentials = Py_None;");
506         $self->pidl("TALLOC_CTX *mem_ctx = NULL;");
507         $self->pidl("NTSTATUS status;");
508         $self->pidl("");
509         $self->pidl("const char *kwnames[] = {");
510         $self->indent;
511         $self->pidl("\"binding\", \"lp_ctx\", \"credentials\", NULL");
512         $self->deindent;
513         $self->pidl("};");
514         $self->pidl("extern struct loadparm_context *lp_from_py_object(PyObject *py_obj);");
515     $self->pidl("extern struct cli_credentials *cli_credentials_from_py_object(PyObject *py_obj);");
516         $self->pidl("");
517         $self->pidl("if (!PyArg_ParseTupleAndKeywords(args, kwargs, \"sO|O:$interface->{NAME}\", discard_const_p(char *, kwnames), &binding_string, &py_lp_ctx, &py_credentials)) {");
518         $self->indent;
519         $self->pidl("return NULL;");
520         $self->deindent;
521         $self->pidl("}");
522         $self->pidl("");
523         $self->pidl("if (py_lp_ctx != NULL) {");
524         $self->indent;
525         $self->pidl("lp_ctx = lp_from_py_object(py_lp_ctx);");
526         $self->pidl("if (lp_ctx == NULL) {");
527         $self->indent;
528         $self->pidl("PyErr_SetString(PyExc_TypeError, \"Expected loadparm context\");");
529         $self->pidl("return NULL;");
530         $self->deindent;
531         $self->pidl("}");
532         $self->deindent;
533         $self->pidl("}");
534         $self->pidl("");
535
536     $self->pidl("credentials = cli_credentials_from_py_object(py_credentials);");
537     $self->pidl("if (credentials == NULL) {");
538     $self->indent;
539     $self->pidl("PyErr_SetString(PyExc_TypeError, \"Expected credentials\");");
540     $self->pidl("return NULL;");
541     $self->deindent;
542     $self->pidl("}");
543
544         $self->pidl("ret = PyObject_New($interface->{NAME}_InterfaceObject, &$interface->{NAME}_InterfaceType);");
545         $self->pidl("");
546
547         $self->pidl("status = dcerpc_pipe_connect(NULL, &ret->pipe, binding_string, ");
548         $self->pidl("             &ndr_table_$interface->{NAME}, credentials, NULL, lp_ctx);");
549         $self->handle_ntstatus("status", "NULL", "mem_ctx");
550
551         $self->pidl("ret->pipe->conn->flags |= DCERPC_NDR_REF_ALLOC;");
552
553         $self->pidl("return (PyObject *)ret;");
554         $self->deindent;
555         $self->pidl("}");
556         
557         $self->pidl("");
558
559         $self->pidl_hdr("\n");
560         $self->pidl_hdr("#endif /* _HEADER_NDR_$interface->{NAME} */\n");
561 }
562
563 sub register_module_method($$$$$)
564 {
565         my ($self, $fn_name, $pyfn_name, $flags, $doc) = @_;
566
567         push (@{$self->{module_methods}}, [$fn_name, $pyfn_name, $flags, $doc])
568 }
569
570 sub assign($$$)
571 {
572         my ($self, $dest, $src) = @_;
573         if ($dest =~ /^\&/) {
574                 $self->pidl("memcpy($dest, $src, sizeof(*$dest));");
575         } else {
576                 $self->pidl("$dest = $src;");
577         }
578 }
579
580 sub ConvertObjectFromPythonData($$$$$$)
581 {
582         my ($self, $mem_ctx, $cvar, $ctype, $target, $fail) = @_;
583
584         die("undef type for $cvar") unless(defined($ctype));
585
586         if (ref($ctype) ne "HASH") {
587                 $ctype = getType($ctype);
588         }
589
590         if (ref($ctype) ne "HASH") {
591                 $self->pidl("$target = FIXME($cvar);");
592                 return;
593         }
594
595         my $actual_ctype = $ctype;
596         if ($ctype->{TYPE} eq "TYPEDEF") {
597                 $actual_ctype = $ctype->{DATA};
598         }
599
600         if ($actual_ctype->{TYPE} eq "ENUM" or $actual_ctype->{TYPE} eq "BITMAP" or 
601                 $actual_ctype->{TYPE} eq "SCALAR" and (
602                 expandAlias($actual_ctype->{NAME}) =~ /^(u?int[0-9]+|hyper|NTTIME|time_t|NTTIME_hyper|NTTIME_1sec|dlong|udlong|udlongr)$/)) {
603                 $self->pidl("PY_CHECK_TYPE(PyInt, $cvar, $fail);");
604                 $self->pidl("$target = PyInt_AsLong($cvar);");
605                 return;
606         }
607
608         if ($actual_ctype->{TYPE} eq "STRUCT") {
609                 $self->pidl("PY_CHECK_TYPE($ctype->{NAME}, $cvar, $fail);");
610                 $self->assign($target, "py_talloc_get_ptr($cvar)");
611                 return;
612         }
613
614         if ($actual_ctype->{TYPE} eq "SCALAR" and $actual_ctype->{NAME} eq "DATA_BLOB") {
615                 $self->pidl("$target = data_blob_talloc($mem_ctx, PyString_AsString($cvar), PyString_Size($cvar));");
616                 return;
617         }
618
619         if ($actual_ctype->{TYPE} eq "SCALAR" and 
620                 ($actual_ctype->{NAME} eq "string" or $actual_ctype->{NAME} eq "nbt_string" or $actual_ctype->{NAME} eq "nbt_name" or $actual_ctype->{NAME} eq "wrepl_nbt_name")) {
621                 $self->pidl("$target = talloc_strdup($mem_ctx, PyString_AsString($cvar));");
622                 return;
623         }
624
625         if ($actual_ctype->{TYPE} eq "SCALAR" and $actual_ctype->{NAME} eq "ipv4address") {
626                 $self->pidl("$target = FIXME($cvar);");
627                 return;
628                 }
629
630
631         if ($actual_ctype->{TYPE} eq "SCALAR" and $actual_ctype->{NAME} eq "NTSTATUS") {
632                 $self->pidl("$target = PyInt_AsLong($cvar);");
633                 return;
634         }
635
636         if ($actual_ctype->{TYPE} eq "SCALAR" and $actual_ctype->{NAME} eq "WERROR") {
637                 $self->pidl("$target = PyInt_AsLong($cvar);");
638                 return;
639         }
640
641         if ($actual_ctype->{TYPE} eq "SCALAR" and $actual_ctype->{NAME} eq "string_array") {
642                 $self->pidl("$target = FIXME($cvar);");
643                 return;
644         }
645
646         if ($actual_ctype->{TYPE} eq "SCALAR" and $actual_ctype->{NAME} eq "pointer") {
647                 $self->assign($target, "PyCObject_AsVoidPtr($cvar)");
648                 return;
649         }
650
651         die("unknown type ".mapTypeName($ctype) . ": $cvar");
652
653 }
654
655 sub ConvertObjectFromPythonLevel($$$$$$$$)
656 {
657         my ($self, $env, $mem_ctx, $py_var, $e, $l, $var_name, $fail) = @_;
658
659         if ($l->{TYPE} eq "POINTER") {
660                 if ($l->{POINTER_TYPE} ne "ref") {
661                         $self->pidl("if ($py_var == Py_None) {");
662                         $self->indent;
663                         $self->pidl("$var_name = NULL;");
664                         $self->deindent;
665                         $self->pidl("} else {");
666                         $self->indent;
667                 }
668                 $self->ConvertObjectFromPythonLevel($env, $mem_ctx, $py_var, $e, GetNextLevel($e, $l), get_value_of($var_name), $fail);
669                 if ($l->{POINTER_TYPE} ne "ref") {
670                         $self->deindent;
671                         $self->pidl("}");
672                 }
673         } elsif ($l->{TYPE} eq "ARRAY") {
674                 if (is_charset_array($e, $l)) {
675                         $self->pidl("PY_CHECK_TYPE(PyUnicode, $py_var, $fail);");
676                         $self->pidl(get_pointer_to($var_name) . " = PyString_AsString(PyUnicode_AsEncodedString($py_var, \"utf-8\", \"ignore\"));");
677                 } else {
678                         my $counter = "$e->{NAME}_cntr_$l->{LEVEL_INDEX}";
679                         $self->pidl("PY_CHECK_TYPE(PyList, $py_var, $fail);");
680                         $self->pidl("{");
681                         $self->indent;
682                         $self->pidl("int $counter;");
683                         $self->pidl("$var_name = talloc_array_ptrtype($mem_ctx, $var_name, PyList_Size($py_var));");
684                         $self->pidl("for ($counter = 0; $counter < PyList_Size($py_var); $counter++) {");
685                         $self->indent;
686                         $self->ConvertObjectFromPythonLevel($env, $var_name, "PyList_GetItem($py_var, $counter)", $e, GetNextLevel($e, $l), $var_name."[$counter]", $fail);
687                         $self->deindent;
688                         $self->pidl("}");
689                         $self->deindent;
690                         $self->pidl("}");
691                 }
692         } elsif ($l->{TYPE} eq "DATA") {
693
694                 if (not Parse::Pidl::Typelist::is_scalar($l->{DATA_TYPE}) or 
695                         Parse::Pidl::Typelist::scalar_is_reference($l->{DATA_TYPE})) {
696                         $var_name = get_pointer_to($var_name);
697                 }
698                 $self->ConvertObjectFromPythonData($mem_ctx, $py_var, $l->{DATA_TYPE}, $var_name, $fail);
699         } elsif ($l->{TYPE} eq "SWITCH") {
700                 $var_name = get_pointer_to($var_name);
701                 my $switch = ParseExpr($l->{SWITCH_IS}, $env, $e);
702                 $self->pidl("$var_name = py_export_" . GetNextLevel($e, $l)->{DATA_TYPE} . "($mem_ctx, $switch, $py_var);");
703         } elsif ($l->{TYPE} eq "SUBCONTEXT") {
704                 $self->pidl("#error Subcontext not yet supported");
705         } else {
706                 die("unknown level type $l->{TYPE}");
707         }
708 }
709
710 sub ConvertObjectFromPython($$$$$$$)
711 {
712         my ($self, $env, $mem_ctx, $ctype, $cvar, $target, $fail) = @_;
713
714         $self->ConvertObjectFromPythonLevel($env, $mem_ctx, $cvar, $ctype, $ctype->{LEVELS}[0], $target, $fail);
715 }
716
717 sub ConvertScalarToPython($$$)
718 {
719         my ($self, $ctypename, $cvar) = @_;
720
721         die("expected string for $cvar, not $ctypename") if (ref($ctypename) eq "HASH");
722
723         $ctypename = expandAlias($ctypename);
724
725         if ($ctypename =~ /^(int|long|char|u?int[0-9]+|hyper|dlong|udlong|udlongr|time_t|NTTIME_hyper|NTTIME|NTTIME_1sec)$/) {
726                 return "PyInt_FromLong($cvar)";
727         }
728
729         if ($ctypename eq "DATA_BLOB") {
730                 return "PyString_FromStringAndSize($cvar->data, $cvar->length)";
731         }
732
733         if ($ctypename eq "NTSTATUS") {
734                 return "PyInt_FromLong(NT_STATUS_V($cvar))";
735         }
736
737         if ($ctypename eq "WERROR") {
738                 return "PyInt_FromLong(W_ERROR_V($cvar))";
739         }
740
741         if (($ctypename eq "string" or $ctypename eq "nbt_string" or $ctypename eq "nbt_name" or $ctypename eq "wrepl_nbt_name")) {
742                 return "PyString_FromString($cvar)";
743         }
744
745         # Not yet supported
746         if ($ctypename eq "string_array") { return "PyCObject_FromVoidPtr($cvar)"; }
747         if ($ctypename eq "ipv4address") { return "PyCObject_FromVoidPtr($cvar)"; }
748         if ($ctypename eq "pointer") {
749                 return "PyCObject_FromVoidPtr($cvar, talloc_free)";
750         }
751
752         die("Unknown scalar type $ctypename");
753 }
754
755 sub ConvertObjectToPythonData($$$$$)
756 {
757         my ($self, $mem_ctx, $ctype, $cvar) = @_;
758
759         die("undef type for $cvar") unless(defined($ctype));
760
761         if (ref($ctype) ne "HASH") {
762                 if (not hasType($ctype)) {
763                         if (ref($ctype) eq "HASH") {
764                                 return "py_import_$ctype->{TYPE}_$ctype->{NAME}($cvar)";
765                         } else {
766                                 return "py_import_$ctype($cvar)"; # best bet
767                         }
768                 }
769
770                 $ctype = getType($ctype);
771         }
772
773         my $actual_ctype = $ctype;
774         if ($ctype->{TYPE} eq "TYPEDEF") {
775                 $actual_ctype = $ctype->{DATA};
776         }
777
778         if ($actual_ctype->{TYPE} eq "ENUM") {
779                 return $self->ConvertScalarToPython(Parse::Pidl::Typelist::enum_type_fn($actual_ctype), $cvar);
780         }
781
782         if ($actual_ctype->{TYPE} eq "BITMAP") {
783                 return $self->ConvertScalarToPython(Parse::Pidl::Typelist::bitmap_type_fn($actual_ctype), $cvar);
784         }
785
786         if ($actual_ctype->{TYPE} eq "SCALAR") {
787                 return $self->ConvertScalarToPython($actual_ctype->{NAME}, $cvar);
788         }
789
790         if ($actual_ctype->{TYPE} eq "STRUCT") {
791                 # FIXME: if $cvar is not a pointer, do a talloc_dup()
792                 return "py_talloc_import(&$ctype->{NAME}_Type, $cvar)";
793         }
794
795         die("unknown type ".mapTypeName($ctype) . ": $cvar");
796 }
797
798 sub ConvertObjectToPythonLevel($$$$$)
799 {
800         my ($self, $mem_ctx, $env, $e, $l, $var_name, $py_var) = @_;
801
802         if ($l->{TYPE} eq "POINTER") {
803                 if ($l->{POINTER_TYPE} ne "ref") {
804                         $self->pidl("if ($var_name == NULL) {");
805                         $self->indent;
806                         $self->pidl("$py_var = Py_None;");
807                         $self->deindent;
808                         $self->pidl("} else {");
809                         $self->indent;
810                 }
811                 $self->ConvertObjectToPythonLevel($var_name, $env, $e, GetNextLevel($e, $l), get_value_of($var_name), $py_var);
812                 if ($l->{POINTER_TYPE} ne "ref") {
813                         $self->deindent;
814                         $self->pidl("}");
815                 }
816         } elsif ($l->{TYPE} eq "ARRAY") {
817                 if (is_charset_array($e, $l)) {
818                         $var_name = get_pointer_to($var_name);
819                         $self->pidl("$py_var = PyUnicode_Decode($var_name, strlen($var_name), \"utf-8\", \"ignore\");");
820                 } else {
821                         die("No SIZE_IS for array $var_name") unless (defined($l->{SIZE_IS}));
822                         my $length = $l->{SIZE_IS};
823                         if (defined($l->{LENGTH_IS})) {
824                                 $length = $l->{LENGTH_IS};
825                         }
826
827                         $length = ParseExpr($length, $env, $e);
828                         $self->pidl("$py_var = PyList_New($length);");
829                         $self->pidl("{");
830                         $self->indent;
831                         my $counter = "$e->{NAME}_cntr_$l->{LEVEL_INDEX}";
832                         $self->pidl("int $counter;");
833                         $self->pidl("for ($counter = 0; $counter < $length; $counter++) {");
834                         $self->indent;
835                         my $member_var = "py_$e->{NAME}_$l->{LEVEL_INDEX}";
836                         $self->pidl("PyObject *$member_var;");
837                         $self->ConvertObjectToPythonLevel($var_name, $env, $e, GetNextLevel($e, $l), $var_name."[$counter]", $member_var);
838                         $self->pidl("PyList_SetItem($py_var, $counter, $member_var);");
839                         $self->deindent;
840                         $self->pidl("}");
841                         $self->deindent;
842                         $self->pidl("}");
843                 }
844         } elsif ($l->{TYPE} eq "SWITCH") {
845                 $var_name = get_pointer_to($var_name);
846                 my $switch = ParseExpr($l->{SWITCH_IS}, $env, $e);
847                 $self->pidl("$py_var = py_import_" . GetNextLevel($e, $l)->{DATA_TYPE} . "($mem_ctx, $switch, $var_name);");
848         } elsif ($l->{TYPE} eq "DATA") {
849                 if (not Parse::Pidl::Typelist::is_scalar($l->{DATA_TYPE}) or 
850                         Parse::Pidl::Typelist::scalar_is_reference($l->{DATA_TYPE})) {
851                         $var_name = get_pointer_to($var_name);
852                 }
853                 my $conv = $self->ConvertObjectToPythonData($mem_ctx, $l->{DATA_TYPE}, $var_name);
854                 $self->pidl("$py_var = $conv;");
855         } elsif ($l->{TYPE} eq "SUBCONTEXT") {
856                 $self->pidl("FIXME");
857         } else {
858                 die("Unknown level type $l->{TYPE} $var_name");
859         }
860 }
861
862 sub ConvertObjectToPython($$$$$$)
863 {
864         my ($self, $mem_ctx, $env, $ctype, $cvar, $py_var) = @_;
865
866         $self->ConvertObjectToPythonLevel($mem_ctx, $env, $ctype, $ctype->{LEVELS}[0], $cvar, $py_var);
867 }
868
869 sub Parse($$$$$)
870 {
871     my($self,$basename,$ndr,$ndr_hdr,$hdr) = @_;
872     
873     my $py_hdr = $hdr;
874     $py_hdr =~ s/ndr_([^\/]+)$/py_$1/g;
875
876     $self->pidl_hdr("/* header auto-generated by pidl */\n\n");
877         
878     $self->pidl("
879 /* Python wrapper functions auto-generated by pidl */
880 #include \"includes.h\"
881 #include <Python.h>
882 #include \"librpc/rpc/dcerpc.h\"
883 #include \"scripting/python/pytalloc.h\"
884 #include \"$hdr\"
885 #include \"$ndr_hdr\"
886 #include \"$py_hdr\"
887
888 #define PY_CHECK_TYPE(type, var, fail) \\
889         if (!type ## _Check(var)) {\\
890                 PyErr_Format(PyExc_TypeError, \"Expected type %s\", type ## _Type.tp_name); \\
891                 fail; \\
892         }
893 ");
894
895         foreach my $x (@$ndr) {
896             ($x->{TYPE} eq "INTERFACE") && $self->Interface($x, $basename);
897                 ($x->{TYPE} eq "IMPORT") && $self->Import(@{$x->{PATHS}});
898         }
899         
900         $self->pidl("static PyMethodDef $basename\_methods[] = {");
901         $self->indent;
902         foreach (@{$self->{module_methods}}) {
903                 my ($fn_name, $pyfn_name, $flags, $doc) = @$_;
904                 $self->pidl("{ \"$fn_name\", (PyCFunction)$pyfn_name, $flags, $doc },");
905         }
906         
907         $self->pidl("{ NULL, NULL, 0, NULL }");
908         $self->deindent;
909         $self->pidl("};");
910
911         $self->pidl("");
912
913         $self->pidl("void init$basename(void)");
914         $self->pidl("{");
915         $self->indent;
916         $self->pidl("PyObject *m;");
917         $self->pidl("m = Py_InitModule(\"$basename\", $basename\_methods);");
918         foreach my $name (keys %{$self->{constants}}) {
919                 my $py_obj;
920                 my ($ctype, $cvar) = @{$self->{constants}->{$name}};
921                 if ($cvar =~ /^[0-9]+$/ or $cvar =~ /^0x[0-9a-fA-F]+$/) {
922                         $py_obj = "PyInt_FromLong($cvar)";
923                 } elsif ($cvar =~ /^".*"$/) {
924                         $py_obj = "PyString_FromString($cvar)";
925                 } else {
926                         $py_obj = $self->ConvertObjectToPythonData("NULL", $ctype, $cvar);
927                 }
928
929                 $self->pidl("PyModule_AddObject(m, \"$name\", $py_obj);");
930         }
931         $self->deindent;
932         $self->pidl("}");
933     return ($self->{res_hdr}, $self->{res});
934 }
935
936 1;