aboutsummaryrefslogtreecommitdiff
path: root/gdb/ui-out.c
blob: 9fe72ddf3bfd9c7c2b0a00c8010cc5629fd11d21 (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
/* Output generating routines for GDB.

   Copyright (C) 1999-2016 Free Software Foundation, Inc.

   Contributed by Cygnus Solutions.
   Written by Fernando Nasser for Cygnus.

   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 "expression.h"		/* For language.h */
#include "language.h"
#include "ui-out.h"

#include <vector>
#include <memory>
#include <string>
#include <memory>

/* A header of a ui_out_table.  */

class ui_out_hdr
{
 public:

  explicit ui_out_hdr (int number, int min_width, ui_align alignment,
		       const std::string &name, const std::string &header)
  : m_number (number),
    m_min_width (min_width),
    m_alignment (alignment),
    m_name (name),
    m_header (header)
  {
  }

  int number () const
  {
    return m_number;
  }

  int min_width () const
  {
    return m_min_width;
  }

  ui_align alignment () const
  {
    return m_alignment;
  }

  const std::string &header () const
  {
    return m_header;
  }

  const std::string &name () const
  {
    return m_name;
  }

 private:

  /* The number of the table column this header represents, 1-based.  */
  int m_number;

  /* Minimal column width in characters.  May or may not be applicable,
     depending on the actual implementation of ui_out.  */
  int m_min_width;

  /* Alignment of the content in the column.  May or may not be applicable,
     depending on the actual implementation of ui_out.  */
  ui_align m_alignment;

  /* Internal column name, used to internally refer to the column.  */
  std::string m_name;

  /* Printed header text of the column.  */
  std::string m_header;
};

/* A level of nesting (either a list or a tuple) in a ui_out output.  */

class ui_out_level
{
 public:

  explicit ui_out_level (ui_out_type type)
  : m_type (type),
    m_field_count (0)
  {
  }

  ui_out_type type () const
  {
    return m_type;
  }

  int field_count () const
  {
    return m_field_count;
  }

  void inc_field_count ()
  {
    m_field_count++;
  }

 private:

  /* The type of this level.  */
  ui_out_type m_type;

  /* Count each field; the first element is for non-list fields.  */
  int m_field_count;
};

/* Tables are special.  Maintain a separate structure that tracks
   their state.  At present an output can only contain a single table
   but that restriction might eventually be lifted.  */

class ui_out_table
{
 public:

  /* States (steps) of a table generation.  */

  enum class state
  {
    /* We are generating the table headers.  */
    HEADERS,

    /* We are generating the table body.  */
    BODY,
  };

  explicit ui_out_table (int entry_level, int nr_cols, const std::string &id)
  : m_state (state::HEADERS),
    m_entry_level (entry_level),
    m_nr_cols (nr_cols),
    m_id (id)
  {
  }

  /* Start building the body of the table.  */

  void start_body ();

  /* Add a new header to the table.  */

  void append_header (int width, ui_align alignment,
		      const std::string &col_name, const std::string &col_hdr);

  void start_row ();

  /* Extract the format information for the next header and advance
     the header iterator.  Return false if there was no next header.  */

  bool get_next_header (int *colno, int *width, ui_align *alignment,
		       const char **col_hdr);

  bool query_field (int colno, int *width, int *alignment,
		    const char **col_name) const;

  state current_state () const;

  int entry_level () const;

 private:

  state m_state;

  /* The level at which each entry of the table is to be found.  A row
     (a tuple) is made up of entries.  Consequently ENTRY_LEVEL is one
     above that of the table.  */
  int m_entry_level;

  /* Number of table columns (as specified in the table_begin call).  */
  int m_nr_cols;

  /* String identifying the table (as specified in the table_begin
     call).  */
  std::string m_id;

  /* Pointers to the column headers.  */
  std::vector<std::unique_ptr<ui_out_hdr>> m_headers;

  /* Iterator over the headers vector, used when printing successive fields.  */
  std::vector<std::unique_ptr<ui_out_hdr>>::const_iterator m_headers_iterator;
};

/* See ui-out.h.  */

void ui_out_table::start_body ()
{
  if (m_state != state::HEADERS)
    internal_error (__FILE__, __LINE__,
		    _("extra table_body call not allowed; there must be only "
		      "one table_body after a table_begin and before a "
		      "table_end."));

  /* Check if the number of defined headers matches the number of expected
     columns.  */
  if (m_headers.size () != m_nr_cols)
    internal_error (__FILE__, __LINE__,
		    _("number of headers differ from number of table "
		      "columns."));

  m_state = state::BODY;
  m_headers_iterator = m_headers.begin ();
}

/* See ui-out.h.  */

void ui_out_table::append_header (int width, ui_align alignment,
				  const std::string &col_name,
				  const std::string &col_hdr)
{
  if (m_state != state::HEADERS)
    internal_error (__FILE__, __LINE__,
		    _("table header must be specified after table_begin and "
		      "before table_body."));

  std::unique_ptr<ui_out_hdr> header (new ui_out_hdr (m_headers.size () + 1,
							width, alignment,
							col_name, col_hdr));

  m_headers.push_back (std::move (header));
}

/* See ui-out.h.  */

void ui_out_table::start_row ()
{
  m_headers_iterator = m_headers.begin ();
}

/* See ui-out.h.  */

bool ui_out_table::get_next_header (int *colno, int *width, ui_align *alignment,
				    const char **col_hdr)
{
  /* There may be no headers at all or we may have used all columns.  */
  if (m_headers_iterator == m_headers.end ())
    return false;

  ui_out_hdr *hdr = m_headers_iterator->get ();

  *colno = hdr->number ();
  *width = hdr->min_width ();
  *alignment = hdr->alignment ();
  *col_hdr = hdr->header ().c_str ();

  /* Advance the header pointer to the next entry.  */
  m_headers_iterator++;

  return true;
}

/* See ui-out.h.  */

bool ui_out_table::query_field (int colno, int *width, int *alignment,
				const char **col_name) const
{
  /* Column numbers are 1-based, so convert to 0-based index.  */
  int index = colno - 1;

  if (index >= 0 && index < m_headers.size ())
    {
      ui_out_hdr *hdr = m_headers[index].get ();

      gdb_assert (colno == hdr->number ());

      *width = hdr->min_width ();
      *alignment = hdr->alignment ();
      *col_name = hdr->name ().c_str ();

      return true;
    }
  else
    return false;
}

/* See ui-out.h.  */

ui_out_table::state ui_out_table::current_state () const
{
  return m_state;
}

/* See ui-out.h.  */

int ui_out_table::entry_level () const
{
  return m_entry_level;
}

int
ui_out::level () const
{
  return m_levels.size ();
}

/* The current (inner most) level.  */

ui_out_level *
ui_out::current_level () const
{
  return m_levels.back ().get ();
}

/* Create a new level, of TYPE.  */
void
ui_out::push_level (ui_out_type type)
{
  std::unique_ptr<ui_out_level> level (new ui_out_level (type));

  m_levels.push_back (std::move (level));
}

/* Discard the current level.  TYPE is the type of the level being
   discarded.  */
void
ui_out::pop_level (ui_out_type type)
{
  /* We had better not underflow the buffer.  */
  gdb_assert (m_levels.size () > 0);
  gdb_assert (current_level ()->type () == type);

  m_levels.pop_back ();
}

/* Mark beginning of a table.  */

void
ui_out::table_begin (int nr_cols, int nr_rows, const std::string &tblid)
{
  if (m_table_up != nullptr)
    internal_error (__FILE__, __LINE__,
		    _("tables cannot be nested; table_begin found before \
previous table_end."));

  m_table_up.reset (new ui_out_table (level () + 1, nr_cols, tblid));

  do_table_begin (nr_cols, nr_rows, tblid.c_str ());
}

void
ui_out::table_header (int width, ui_align alignment,
		      const std::string &col_name, const std::string &col_hdr)
{
  if (m_table_up == nullptr)
    internal_error (__FILE__, __LINE__,
		    _("table_header outside a table is not valid; it must be \
after a table_begin and before a table_body."));

  m_table_up->append_header (width, alignment, col_name, col_hdr);

  do_table_header (width, alignment, col_name, col_hdr);
}

void
ui_out::table_body ()
{
  if (m_table_up == nullptr)
    internal_error (__FILE__, __LINE__,
		    _("table_body outside a table is not valid; it must be "
		      "after a table_begin and before a table_end."));

  m_table_up->start_body ();

  do_table_body ();
}

void
ui_out::table_end ()
{
  if (m_table_up == nullptr)
    internal_error (__FILE__, __LINE__,
		    _("misplaced table_end or missing table_begin."));

  do_table_end ();

  m_table_up = nullptr;
}

static void
do_cleanup_table_end (void *data)
{
  ui_out *uiout = (ui_out *) data;

  uiout->table_end ();
}

struct cleanup *
make_cleanup_ui_out_table_begin_end (ui_out *uiout, int nr_cols, int nr_rows,
				     const char *tblid)
{
  uiout->table_begin (nr_cols, nr_rows, tblid);
  return make_cleanup (do_cleanup_table_end, uiout);
}

void
ui_out::begin (ui_out_type type, const char *id)
{
  /* Be careful to verify the ``field'' before the new tuple/list is
     pushed onto the stack.  That way the containing list/table/row is
     verified and not the newly created tuple/list.  This verification
     is needed (at least) for the case where a table row entry
     contains either a tuple/list.  For that case bookkeeping such as
     updating the column count or advancing to the next heading still
     needs to be performed.  */
  {
    int fldno;
    int width;
    ui_align align;

    verify_field (&fldno, &width, &align);
  }

  push_level (type);

  /* If the push puts us at the same level as a table row entry, we've
     got a new table row.  Put the header pointer back to the start.  */
  if (m_table_up != nullptr
      && m_table_up->current_state () == ui_out_table::state::BODY
      && m_table_up->entry_level () == level ())
    m_table_up->start_row ();

  do_begin (type, id);
}

void
ui_out::end (ui_out_type type)
{
  pop_level (type);

  do_end (type);
}

struct ui_out_end_cleanup_data
{
  struct ui_out *uiout;
  enum ui_out_type type;
};

static void
do_cleanup_end (void *data)
{
  struct ui_out_end_cleanup_data *end_cleanup_data
    = (struct ui_out_end_cleanup_data *) data;

  end_cleanup_data->uiout->end (end_cleanup_data->type);
  xfree (end_cleanup_data);
}

static struct cleanup *
make_cleanup_ui_out_end (struct ui_out *uiout,
			 enum ui_out_type type)
{
  struct ui_out_end_cleanup_data *end_cleanup_data;

  end_cleanup_data = XNEW (struct ui_out_end_cleanup_data);
  end_cleanup_data->uiout = uiout;
  end_cleanup_data->type = type;
  return make_cleanup (do_cleanup_end, end_cleanup_data);
}

struct cleanup *
make_cleanup_ui_out_tuple_begin_end (struct ui_out *uiout,
				     const char *id)
{
  uiout->begin (ui_out_type_tuple, id);
  return make_cleanup_ui_out_end (uiout, ui_out_type_tuple);
}

struct cleanup *
make_cleanup_ui_out_list_begin_end (struct ui_out *uiout,
				    const char *id)
{
  uiout->begin (ui_out_type_list, id);
  return make_cleanup_ui_out_end (uiout, ui_out_type_list);
}

void
ui_out::field_int (const char *fldname, int value)
{
  int fldno;
  int width;
  ui_align align;

  verify_field (&fldno, &width, &align);

  do_field_int (fldno, width, align, fldname, value);
}

void
ui_out::field_fmt_int (int input_width, ui_align input_align,
		       const char *fldname, int value)
{
  int fldno;
  int width;
  ui_align align;

  verify_field (&fldno, &width, &align);

  do_field_int (fldno, input_width, input_align, fldname, value);
}

/* Documented in ui-out.h.  */

void
ui_out::field_core_addr (const char *fldname, struct gdbarch *gdbarch,
			 CORE_ADDR address)
{
  field_string (fldname, print_core_address (gdbarch, address));
}

void
ui_out::field_stream (const char *fldname, ui_file *stream)
{
  std::string buffer = ui_file_as_string (stream);

  if (!buffer.empty ())
    field_string (fldname, buffer.c_str ());
  else
    field_skip (fldname);
  ui_file_rewind (stream);
}

/* Used to omit a field.  */

void
ui_out::field_skip (const char *fldname)
{
  int fldno;
  int width;
  ui_align align;

  verify_field (&fldno, &width, &align);

  do_field_skip (fldno, width, align, fldname);
}

void
ui_out::field_string (const char *fldname, const char *string)
{
  int fldno;
  int width;
  ui_align align;

  verify_field (&fldno, &width, &align);

  do_field_string (fldno, width, align, fldname, string);
}

/* VARARGS */
void
ui_out::field_fmt (const char *fldname, const char *format, ...)
{
  va_list args;
  int fldno;
  int width;
  ui_align align;

  /* Will not align, but has to call anyway.  */
  verify_field (&fldno, &width, &align);

  va_start (args, format);

  do_field_fmt (fldno, width, align, fldname, format, args);

  va_end (args);
}

void
ui_out::spaces (int numspaces)
{
  do_spaces (numspaces);
}

void
ui_out::text (const char *string)
{
  do_text (string);
}

void
ui_out::message (const char *format, ...)
{
  va_list args;

  va_start (args, format);
  do_message (format, args);
  va_end (args);
}

void
ui_out::wrap_hint (const char *identstring)
{
  do_wrap_hint (identstring);
}

void
ui_out::flush ()
{
  do_flush ();
}

int
ui_out::redirect (ui_file *outstream)
{
  return do_redirect (outstream);
}

/* Test the flags against the mask given.  */
ui_out_flags
ui_out::test_flags (ui_out_flags mask)
{
  return m_flags & mask;
}

bool
ui_out::is_mi_like_p ()
{
  return do_is_mi_like_p ();
}

/* Verify that the field/tuple/list is correctly positioned.  Return
   the field number and corresponding alignment (if
   available/applicable).  */

void
ui_out::verify_field (int *fldno, int *width, ui_align *align)
{
  ui_out_level *current = current_level ();
  const char *text;

  if (m_table_up != nullptr
      && m_table_up->current_state () != ui_out_table::state::BODY)
    {
      internal_error (__FILE__, __LINE__,
		      _("table_body missing; table fields must be \
specified after table_body and inside a list."));
    }

  current->inc_field_count ();

  if (m_table_up != nullptr
      && m_table_up->current_state () == ui_out_table::state::BODY
      && m_table_up->entry_level () == level ()
      && m_table_up->get_next_header (fldno, width, align, &text))
    {
      if (*fldno != current->field_count ())
	internal_error (__FILE__, __LINE__,
			_("ui-out internal error in handling headers."));
    }
  else
    {
      *width = 0;
      *align = ui_noalign;
      *fldno = current->field_count ();
    }
}

/* Access table field parameters.  */

bool
ui_out::query_table_field (int colno, int *width, int *alignment,
			   const char **col_name)
{
  if (m_table_up == nullptr)
    return false;

  return m_table_up->query_field (colno, width, alignment, col_name);
}

/* The constructor.  */

ui_out::ui_out (ui_out_flags flags)
: m_flags (flags)
{
  /* Create the ui-out level #1, the default level.  */
  push_level (ui_out_type_tuple);
}

ui_out::~ui_out ()
{
}