aboutsummaryrefslogtreecommitdiff
path: root/gdb/python/py-param.c
blob: acb48cd3375cf14b06e30c05ab3a50249abfc765 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
/* GDB parameters implemented in Python

   Copyright (C) 2008-2013 Free Software Foundation, Inc.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */


#include "defs.h"
#include "value.h"
#include "exceptions.h"
#include "python-internal.h"
#include "charset.h"
#include "gdbcmd.h"
#include "cli/cli-decode.h"
#include "completer.h"
#include "language.h"
#include "arch-utils.h"

/* Parameter constants and their values.  */
struct parm_constant
{
  char *name;
  int value;
};

struct parm_constant parm_constants[] =
{
  { "PARAM_BOOLEAN", var_boolean }, /* ARI: var_boolean */
  { "PARAM_AUTO_BOOLEAN", var_auto_boolean },
  { "PARAM_UINTEGER", var_uinteger },
  { "PARAM_INTEGER", var_integer },
  { "PARAM_STRING", var_string },
  { "PARAM_STRING_NOESCAPE", var_string_noescape },
  { "PARAM_OPTIONAL_FILENAME", var_optional_filename },
  { "PARAM_FILENAME", var_filename },
  { "PARAM_ZINTEGER", var_zinteger },
  { "PARAM_ENUM", var_enum },
  { NULL, 0 }
};

/* A union that can hold anything described by enum var_types.  */
union parmpy_variable
{
  /* Hold an integer value, for boolean and integer types.  */
  int intval;

  /* Hold an auto_boolean.  */
  enum auto_boolean autoboolval;

  /* Hold an unsigned integer value, for uinteger.  */
  unsigned int uintval;

  /* Hold a string, for the various string types.  */
  char *stringval;

  /* Hold a string, for enums.  */
  const char *cstringval;
};

/* A GDB parameter.  */
struct parmpy_object
{
  PyObject_HEAD

  /* The type of the parameter.  */
  enum var_types type;

  /* The value of the parameter.  */
  union parmpy_variable value;

  /* For an enum command, the possible values.  The vector is
     allocated with xmalloc, as is each element.  It is
     NULL-terminated.  */
  const char **enumeration;
};

typedef struct parmpy_object parmpy_object;

static PyTypeObject parmpy_object_type;

/* Some handy string constants.  */
static PyObject *set_doc_cst;
static PyObject *show_doc_cst;



/* Get an attribute.  */
static PyObject *
get_attr (PyObject *obj, PyObject *attr_name)
{
  if (PyString_Check (attr_name)
#ifdef IS_PY3K
      && ! PyUnicode_CompareWithASCIIString (attr_name, "value"))
#else
      && ! strcmp (PyString_AsString (attr_name), "value"))
#endif
    {
      parmpy_object *self = (parmpy_object *) obj;

      return gdbpy_parameter_value (self->type, &self->value);
    }

  return PyObject_GenericGetAttr (obj, attr_name);
}

/* Set a parameter value from a Python value.  Return 0 on success.  Returns
   -1 on error, with a python exception set.  */
static int
set_parameter_value (parmpy_object *self, PyObject *value)
{
  int cmp;

  switch (self->type)
    {
    case var_string:
    case var_string_noescape:
    case var_optional_filename:
    case var_filename:
      if (! gdbpy_is_string (value)
	  && (self->type == var_filename
	      || value != Py_None))
	{
	  PyErr_SetString (PyExc_RuntimeError, 
			   _("String required for filename."));

	  return -1;
	}
      if (value == Py_None)
	{
	  xfree (self->value.stringval);
	  if (self->type == var_optional_filename)
	    self->value.stringval = xstrdup ("");
	  else
	    self->value.stringval = NULL;
	}
      else
	{
	  char *string;

	  string = python_string_to_host_string (value);
	  if (string == NULL)
	    return -1;

	  xfree (self->value.stringval);
	  self->value.stringval = string;
	}
      break;

    case var_enum:
      {
	int i;
	char *str;

	if (! gdbpy_is_string (value))
	  {
	    PyErr_SetString (PyExc_RuntimeError, 
			     _("ENUM arguments must be a string."));
	    return -1;
	  }

	str = python_string_to_host_string (value);
	if (str == NULL)
	  return -1;
	for (i = 0; self->enumeration[i]; ++i)
	  if (! strcmp (self->enumeration[i], str))
	    break;
	xfree (str);
	if (! self->enumeration[i])
	  {
	    PyErr_SetString (PyExc_RuntimeError,
			     _("The value must be member of an enumeration."));
	    return -1;
	  }
	self->value.cstringval = self->enumeration[i];
	break;
      }

    case var_boolean:
      if (! PyBool_Check (value))
	{
	  PyErr_SetString (PyExc_RuntimeError, 
			   _("A boolean argument is required."));
	  return -1;
	}
      cmp = PyObject_IsTrue (value);
      if (cmp < 0) 
	  return -1;
      self->value.intval = cmp;
      break;

    case var_auto_boolean:
      if (! PyBool_Check (value) && value != Py_None)
	{
	  PyErr_SetString (PyExc_RuntimeError,
			   _("A boolean or None is required"));
	  return -1;
	}

      if (value == Py_None)
	self->value.autoboolval = AUTO_BOOLEAN_AUTO;
      else
	{
	  cmp = PyObject_IsTrue (value);
	  if (cmp < 0 )
	    return -1;	  
	  if (cmp == 1)
	    self->value.autoboolval = AUTO_BOOLEAN_TRUE;
	  else 
	    self->value.autoboolval = AUTO_BOOLEAN_FALSE;
	}
      break;

    case var_integer:
    case var_zinteger:
    case var_uinteger:
      {
	long l;
	int ok;

	if (! PyInt_Check (value))
	  {
	    PyErr_SetString (PyExc_RuntimeError, 
			     _("The value must be integer."));
	    return -1;
	  }

	if (! gdb_py_int_as_long (value, &l))
	  return -1;

	if (self->type == var_uinteger)
	  {
	    ok = (l >= 0 && l <= UINT_MAX);
	    if (l == 0)
	      l = UINT_MAX;
	  }
	else if (self->type == var_integer)
	  {
	    ok = (l >= INT_MIN && l <= INT_MAX);
	    if (l == 0)
	      l = INT_MAX;
	  }
	else
	  ok = (l >= INT_MIN && l <= INT_MAX);

	if (! ok)
	  {
	    PyErr_SetString (PyExc_RuntimeError, 
			     _("Range exceeded."));
	    return -1;
	  }

	self->value.intval = (int) l;
	break;
      }

    default:
      PyErr_SetString (PyExc_RuntimeError, 
		       _("Unhandled type in parameter value."));
      return -1;
    }

  return 0;
}

/* Set an attribute.  Returns -1 on error, with a python exception set.  */
static int
set_attr (PyObject *obj, PyObject *attr_name, PyObject *val)
{
  if (PyString_Check (attr_name)
#ifdef IS_PY3K
      && ! PyUnicode_CompareWithASCIIString (attr_name, "value"))
#else
      && ! strcmp (PyString_AsString (attr_name), "value"))
#endif
    {
      if (!val)
	{
	  PyErr_SetString (PyExc_RuntimeError,
			   _("Cannot delete a parameter's value."));
	  return -1;
	}
      return set_parameter_value ((parmpy_object *) obj, val);
    }

  return PyObject_GenericSetAttr (obj, attr_name, val);
}

/* A helper function which returns a documentation string for an
   object. */

static char *
get_doc_string (PyObject *object, PyObject *attr)
{
  char *result = NULL;

  if (PyObject_HasAttr (object, attr))
    {
      PyObject *ds_obj = PyObject_GetAttr (object, attr);

      if (ds_obj && gdbpy_is_string (ds_obj))
	{
	  result = python_string_to_host_string (ds_obj);
	  if (result == NULL)
	    gdbpy_print_stack ();
	}
      Py_XDECREF (ds_obj);
    }
  if (! result)
    result = xstrdup (_("This command is not documented."));
  return result;
}

/* Helper function which will execute a METHOD in OBJ passing the
   argument ARG.  ARG can be NULL.  METHOD should return a Python
   string.  If this function returns NULL, there has been an error and
   the appropriate exception set.  */
static char *
call_doc_function (PyObject *obj, PyObject *method, PyObject *arg)
{
  char *data = NULL;
  PyObject *result = PyObject_CallMethodObjArgs (obj, method, arg, NULL);

  if (! result)
    return NULL;

  if (gdbpy_is_string (result))
    {
      data = python_string_to_host_string (result);
      Py_DECREF (result);
      if (! data)
	return NULL;
    }
  else
    {
      PyErr_SetString (PyExc_RuntimeError,
		       _("Parameter must return a string value."));
      Py_DECREF (result);
      return NULL;
    }

  return data;
}

/* A callback function that is registered against the respective
   add_setshow_* set_doc prototype.  This function will either call
   the Python function "get_set_string" or extract the Python
   attribute "set_doc" and return the contents as a string.  If
   neither exist, insert a string indicating the Parameter is not
   documented.  */
static void
get_set_value (char *args, int from_tty,
	       struct cmd_list_element *c)
{
  PyObject *obj = (PyObject *) get_cmd_context (c);
  char *set_doc_string;
  struct cleanup *cleanup = ensure_python_env (get_current_arch (),
					       current_language);
  PyObject *set_doc_func = PyString_FromString ("get_set_string");

  if (! set_doc_func)
    goto error;

  make_cleanup_py_decref (set_doc_func);

  if (PyObject_HasAttr (obj, set_doc_func))
    {
      set_doc_string = call_doc_function (obj, set_doc_func, NULL);
      if (! set_doc_string)
	goto error;
    }
  else
    {
      /* We have to preserve the existing < GDB 7.3 API.  If a
	 callback function does not exist, then attempt to read the
	 set_doc attribute.  */
      set_doc_string  = get_doc_string (obj, set_doc_cst);
    }

  make_cleanup (xfree, set_doc_string);
  fprintf_filtered (gdb_stdout, "%s\n", set_doc_string);

  do_cleanups (cleanup);
  return;

 error:
  gdbpy_print_stack ();
  do_cleanups (cleanup);
  return;
}

/* A callback function that is registered against the respective
   add_setshow_* show_doc prototype.  This function will either call
   the Python function "get_show_string" or extract the Python
   attribute "show_doc" and return the contents as a string.  If
   neither exist, insert a string indicating the Parameter is not
   documented.  */
static void
get_show_value (struct ui_file *file, int from_tty,
		struct cmd_list_element *c,
		const char *value)
{
  PyObject *obj = (PyObject *) get_cmd_context (c);
  char *show_doc_string = NULL;
  struct cleanup *cleanup = ensure_python_env (get_current_arch (),
					       current_language);
  PyObject *show_doc_func = PyString_FromString ("get_show_string");

  if (! show_doc_func)
    goto error;

  make_cleanup_py_decref (show_doc_func);

  if (PyObject_HasAttr (obj, show_doc_func))
    {
      PyObject *val_obj = PyString_FromString (value);

      if (! val_obj)
	goto error;

      make_cleanup_py_decref (val_obj);

      show_doc_string = call_doc_function (obj, show_doc_func, val_obj);
      if (! show_doc_string)
	goto error;

      make_cleanup (xfree, show_doc_string);

      fprintf_filtered (file, "%s\n", show_doc_string);
    }
  else
    {
      /* We have to preserve the existing < GDB 7.3 API.  If a
	 callback function does not exist, then attempt to read the
	 show_doc attribute.  */
      show_doc_string  = get_doc_string (obj, show_doc_cst);
      make_cleanup (xfree, show_doc_string);
      fprintf_filtered (file, "%s %s\n", show_doc_string, value);
    }

  do_cleanups (cleanup);
  return;

 error:
  gdbpy_print_stack ();
  do_cleanups (cleanup);
  return;
}


/* A helper function that dispatches to the appropriate add_setshow
   function.  */
static void
add_setshow_generic (int parmclass, enum command_class cmdclass,
		     char *cmd_name, parmpy_object *self,
		     char *set_doc, char *show_doc, char *help_doc,
		     struct cmd_list_element **set_list,
		     struct cmd_list_element **show_list)
{
  struct cmd_list_element *param = NULL;
  const char *tmp_name = NULL;

  switch (parmclass)
    {
    case var_boolean:

      add_setshow_boolean_cmd (cmd_name, cmdclass,
			       &self->value.intval, set_doc, show_doc,
			       help_doc, get_set_value, get_show_value,
			       set_list, show_list);

      break;

    case var_auto_boolean:
      add_setshow_auto_boolean_cmd (cmd_name, cmdclass,
				    &self->value.autoboolval,
				    set_doc, show_doc, help_doc,
				    get_set_value, get_show_value,
				    set_list, show_list);
      break;

    case var_uinteger:
      add_setshow_uinteger_cmd (cmd_name, cmdclass,
				&self->value.uintval, set_doc, show_doc,
				help_doc, get_set_value, get_show_value,
				set_list, show_list);
      break;

    case var_integer:
      add_setshow_integer_cmd (cmd_name, cmdclass,
			       &self->value.intval, set_doc, show_doc,
			       help_doc, get_set_value, get_show_value,
			       set_list, show_list); break;

    case var_string:
      add_setshow_string_cmd (cmd_name, cmdclass,
			      &self->value.stringval, set_doc, show_doc,
			      help_doc, get_set_value, get_show_value,
			      set_list, show_list); break;

    case var_string_noescape:
      add_setshow_string_noescape_cmd (cmd_name, cmdclass,
				       &self->value.stringval,
				       set_doc, show_doc, help_doc,
				       get_set_value, get_show_value,
				       set_list, show_list);

      break;

    case var_optional_filename:
      add_setshow_optional_filename_cmd (cmd_name, cmdclass,
					 &self->value.stringval, set_doc,
					 show_doc, help_doc, get_set_value,
					 get_show_value, set_list,
					 show_list);
      break;

    case var_filename:
      add_setshow_filename_cmd (cmd_name, cmdclass,
				&self->value.stringval, set_doc, show_doc,
				help_doc, get_set_value, get_show_value,
				set_list, show_list); break;

    case var_zinteger:
      add_setshow_zinteger_cmd (cmd_name, cmdclass,
				&self->value.intval, set_doc, show_doc,
				help_doc, get_set_value, get_show_value,
				set_list, show_list);
      break;

    case var_enum:
      add_setshow_enum_cmd (cmd_name, cmdclass, self->enumeration,
			    &self->value.cstringval, set_doc, show_doc,
			    help_doc, get_set_value, get_show_value,
			    set_list, show_list);
      /* Initialize the value, just in case.  */
      self->value.cstringval = self->enumeration[0];
      break;
    }

  /* Lookup created parameter, and register Python object against the
     parameter context.  Perform this task against both lists.  */
  tmp_name = cmd_name;
  param = lookup_cmd (&tmp_name, *show_list, "", 0, 1);
  if (param)
    set_cmd_context (param, self);

  tmp_name = cmd_name;
  param = lookup_cmd (&tmp_name, *set_list, "", 0, 1);
  if (param)
    set_cmd_context (param, self);
}

/* A helper which computes enum values.  Returns 1 on success.  Returns 0 on
   error, with a python exception set.  */
static int
compute_enum_values (parmpy_object *self, PyObject *enum_values)
{
  Py_ssize_t size, i;
  struct cleanup *back_to;

  if (! enum_values)
    {
      PyErr_SetString (PyExc_RuntimeError,
		       _("An enumeration is required for PARAM_ENUM."));
      return 0;
    }

  if (! PySequence_Check (enum_values))
    {
      PyErr_SetString (PyExc_RuntimeError, 
		       _("The enumeration is not a sequence."));
      return 0;
    }

  size = PySequence_Size (enum_values);
  if (size < 0)
    return 0;
  if (size == 0)
    {
      PyErr_SetString (PyExc_RuntimeError, 
		       _("The enumeration is empty."));
      return 0;
    }

  self->enumeration = xmalloc ((size + 1) * sizeof (char *));
  back_to = make_cleanup (free_current_contents, &self->enumeration);
  memset (self->enumeration, 0, (size + 1) * sizeof (char *));

  for (i = 0; i < size; ++i)
    {
      PyObject *item = PySequence_GetItem (enum_values, i);

      if (! item)
	{
	  do_cleanups (back_to);
	  return 0;
	}
      if (! gdbpy_is_string (item))
	{
	  do_cleanups (back_to);
	  PyErr_SetString (PyExc_RuntimeError, 
			   _("The enumeration item not a string."));
	  return 0;
	}
      self->enumeration[i] = python_string_to_host_string (item);
      if (self->enumeration[i] == NULL)
	{
	  do_cleanups (back_to);
	  return 0;
	}
      make_cleanup (xfree, (char *) self->enumeration[i]);
    }

  discard_cleanups (back_to);
  return 1;
}

/* Object initializer; sets up gdb-side structures for command.

   Use: __init__(NAME, CMDCLASS, PARMCLASS, [ENUM])

   NAME is the name of the parameter.  It may consist of multiple
   words, in which case the final word is the name of the new command,
   and earlier words must be prefix commands.

   CMDCLASS is the kind of command.  It should be one of the COMMAND_*
   constants defined in the gdb module.

   PARMCLASS is the type of the parameter.  It should be one of the
   PARAM_* constants defined in the gdb module.

   If PARMCLASS is PARAM_ENUM, then the final argument should be a
   collection of strings.  These strings are the valid values for this
   parameter.

   The documentation for the parameter is taken from the doc string
   for the python class.

   Returns -1 on error, with a python exception set.  */

static int
parmpy_init (PyObject *self, PyObject *args, PyObject *kwds)
{
  parmpy_object *obj = (parmpy_object *) self;
  const char *name;
  char *set_doc, *show_doc, *doc;
  char *cmd_name;
  int parmclass, cmdtype;
  PyObject *enum_values = NULL;
  struct cmd_list_element **set_list, **show_list;
  volatile struct gdb_exception except;

  if (! PyArg_ParseTuple (args, "sii|O", &name, &cmdtype, &parmclass,
			  &enum_values))
    return -1;

  if (cmdtype != no_class && cmdtype != class_run
      && cmdtype != class_vars && cmdtype != class_stack
      && cmdtype != class_files && cmdtype != class_support
      && cmdtype != class_info && cmdtype != class_breakpoint
      && cmdtype != class_trace && cmdtype != class_obscure
      && cmdtype != class_maintenance)
    {
      PyErr_Format (PyExc_RuntimeError, _("Invalid command class argument."));
      return -1;
    }

  if (parmclass != var_boolean /* ARI: var_boolean */
      && parmclass != var_auto_boolean
      && parmclass != var_uinteger && parmclass != var_integer
      && parmclass != var_string && parmclass != var_string_noescape
      && parmclass != var_optional_filename && parmclass != var_filename
      && parmclass != var_zinteger && parmclass != var_enum)
    {
      PyErr_SetString (PyExc_RuntimeError,
		       _("Invalid parameter class argument."));
      return -1;
    }

  if (enum_values && parmclass != var_enum)
    {
      PyErr_SetString (PyExc_RuntimeError,
		       _("Only PARAM_ENUM accepts a fourth argument."));
      return -1;
    }
  if (parmclass == var_enum)
    {
      if (! compute_enum_values (obj, enum_values))
	return -1;
    }
  else
    obj->enumeration = NULL;
  obj->type = (enum var_types) parmclass;
  memset (&obj->value, 0, sizeof (obj->value));

  cmd_name = gdbpy_parse_command_name (name, &set_list,
				       &setlist);

  if (! cmd_name)
    return -1;
  xfree (cmd_name);
  cmd_name = gdbpy_parse_command_name (name, &show_list,
				       &showlist);
  if (! cmd_name)
    return -1;

  set_doc = get_doc_string (self, set_doc_cst);
  show_doc = get_doc_string (self, show_doc_cst);
  doc = get_doc_string (self, gdbpy_doc_cst);

  Py_INCREF (self);

  TRY_CATCH (except, RETURN_MASK_ALL)
    {
      add_setshow_generic (parmclass, (enum command_class) cmdtype,
			   cmd_name, obj,
			   set_doc, show_doc,
			   doc, set_list, show_list);
    }
  if (except.reason < 0)
    {
      xfree (cmd_name);
      xfree (set_doc);
      xfree (show_doc);
      xfree (doc);
      Py_DECREF (self);
      PyErr_Format (except.reason == RETURN_QUIT
		    ? PyExc_KeyboardInterrupt : PyExc_RuntimeError,
		    "%s", except.message);
      return -1;
    }
  return 0;
}



/* Initialize the 'parameters' module.  */
void
gdbpy_initialize_parameters (void)
{
  int i;

  parmpy_object_type.tp_new = PyType_GenericNew;
  if (PyType_Ready (&parmpy_object_type) < 0)
    return;

  set_doc_cst = PyString_FromString ("set_doc");
  if (! set_doc_cst)
    return;
  show_doc_cst = PyString_FromString ("show_doc");
  if (! show_doc_cst)
    return;

  for (i = 0; parm_constants[i].name; ++i)
    {
      if (PyModule_AddIntConstant (gdb_module,
				   parm_constants[i].name,
				   parm_constants[i].value) < 0)
	return;
    }

  Py_INCREF (&parmpy_object_type);
  PyModule_AddObject (gdb_module, "Parameter",
		      (PyObject *) &parmpy_object_type);
}



static PyTypeObject parmpy_object_type =
{
  PyVarObject_HEAD_INIT (NULL, 0)
  "gdb.Parameter",		  /*tp_name*/
  sizeof (parmpy_object),	  /*tp_basicsize*/
  0,				  /*tp_itemsize*/
  0,				  /*tp_dealloc*/
  0,				  /*tp_print*/
  0,				  /*tp_getattr*/
  0,				  /*tp_setattr*/
  0,				  /*tp_compare*/
  0,				  /*tp_repr*/
  0,				  /*tp_as_number*/
  0,				  /*tp_as_sequence*/
  0,				  /*tp_as_mapping*/
  0,				  /*tp_hash */
  0,				  /*tp_call*/
  0,				  /*tp_str*/
  get_attr,			  /*tp_getattro*/
  set_attr,			  /*tp_setattro*/
  0,				  /*tp_as_buffer*/
  Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /*tp_flags*/
  "GDB parameter object",	  /* tp_doc */
  0,				  /* tp_traverse */
  0,				  /* tp_clear */
  0,				  /* tp_richcompare */
  0,				  /* tp_weaklistoffset */
  0,				  /* tp_iter */
  0,				  /* tp_iternext */
  0,				  /* tp_methods */
  0,				  /* tp_members */
  0,				  /* tp_getset */
  0,				  /* tp_base */
  0,				  /* tp_dict */
  0,				  /* tp_descr_get */
  0,				  /* tp_descr_set */
  0,				  /* tp_dictoffset */
  parmpy_init,			  /* tp_init */
  0,				  /* tp_alloc */
};