aboutsummaryrefslogtreecommitdiff
path: root/gdb/cli-out.c
blob: 9c2f0183031f969b49ce04711b7ad76188b166d4 (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
/* Output generating routines for GDB CLI.

   Copyright (C) 1999-2022 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 "ui-out.h"
#include "cli-out.h"
#include "completer.h"
#include "readline/readline.h"
#include "cli/cli-style.h"
#include "top.h"

/* These are the CLI output functions */

/* Mark beginning of a table */

void
cli_ui_out::do_table_begin (int nbrofcols, int nr_rows, const char *tblid)
{
  if (nr_rows == 0)
    m_suppress_output = true;
  else
    /* Only the table suppresses the output and, fortunately, a table
       is not a recursive data structure.  */
    gdb_assert (!m_suppress_output);
}

/* Mark beginning of a table body */

void
cli_ui_out::do_table_body ()
{
  if (m_suppress_output)
    return;

  /* first, close the table header line */
  text ("\n");
}

/* Mark end of a table */

void
cli_ui_out::do_table_end ()
{
  m_suppress_output = false;
}

/* Specify table header */

void
cli_ui_out::do_table_header (int width, ui_align alignment,
			     const std::string &col_name,
			     const std::string &col_hdr)
{
  if (m_suppress_output)
    return;

  do_field_string (0, width, alignment, 0, col_hdr.c_str (),
		   ui_file_style ());
}

/* Mark beginning of a list */

void
cli_ui_out::do_begin (ui_out_type type, const char *id)
{
}

/* Mark end of a list */

void
cli_ui_out::do_end (ui_out_type type)
{
}

/* output an int field */

void
cli_ui_out::do_field_signed (int fldno, int width, ui_align alignment,
			     const char *fldname, LONGEST value)
{
  if (m_suppress_output)
    return;

  do_field_string (fldno, width, alignment, fldname, plongest (value),
		   ui_file_style ());
}

/* output an unsigned field */

void
cli_ui_out::do_field_unsigned (int fldno, int width, ui_align alignment,
			       const char *fldname, ULONGEST value)
{
  if (m_suppress_output)
    return;

  do_field_string (fldno, width, alignment, fldname, pulongest (value),
		   ui_file_style ());
}

/* used to omit a field */

void
cli_ui_out::do_field_skip (int fldno, int width, ui_align alignment,
			   const char *fldname)
{
  if (m_suppress_output)
    return;

  do_field_string (fldno, width, alignment, fldname, "",
		   ui_file_style ());
}

/* other specific cli_field_* end up here so alignment and field
   separators are both handled by cli_field_string */

void
cli_ui_out::do_field_string (int fldno, int width, ui_align align,
			     const char *fldname, const char *string,
			     const ui_file_style &style)
{
  int before = 0;
  int after = 0;

  if (m_suppress_output)
    return;

  if ((align != ui_noalign) && string)
    {
      before = width - strlen (string);
      if (before <= 0)
	before = 0;
      else
	{
	  if (align == ui_right)
	    after = 0;
	  else if (align == ui_left)
	    {
	      after = before;
	      before = 0;
	    }
	  else
	    /* ui_center */
	    {
	      after = before / 2;
	      before -= after;
	    }
	}
    }

  if (before)
    spaces (before);

  if (string)
    {
      ui_file *stream = m_streams.back ();
      stream->emit_style_escape (style);
      stream->puts (string);
      stream->emit_style_escape (ui_file_style ());
    }

  if (after)
    spaces (after);

  if (align != ui_noalign)
    field_separator ();
}

/* Output field containing ARGS using printf formatting in FORMAT.  */

void
cli_ui_out::do_field_fmt (int fldno, int width, ui_align align,
			  const char *fldname, const ui_file_style &style,
			  const char *format, va_list args)
{
  if (m_suppress_output)
    return;

  std::string str = string_vprintf (format, args);

  do_field_string (fldno, width, align, fldname, str.c_str (), style);
}

void
cli_ui_out::do_spaces (int numspaces)
{
  if (m_suppress_output)
    return;

  print_spaces (numspaces, m_streams.back ());
}

void
cli_ui_out::do_text (const char *string)
{
  if (m_suppress_output)
    return;

  gdb_puts (string, m_streams.back ());
}

void
cli_ui_out::do_message (const ui_file_style &style,
			const char *format, va_list args)
{
  if (m_suppress_output)
    return;

  std::string str = string_vprintf (format, args);
  if (!str.empty ())
    {
      ui_file *stream = m_streams.back ();
      stream->emit_style_escape (style);
      stream->puts (str.c_str ());
      stream->emit_style_escape (ui_file_style ());
    }
}

void
cli_ui_out::do_wrap_hint (int indent)
{
  if (m_suppress_output)
    return;

  m_streams.back ()->wrap_here (indent);
}

void
cli_ui_out::do_flush ()
{
  gdb_flush (m_streams.back ());
}

/* OUTSTREAM as non-NULL will push OUTSTREAM on the stack of output streams
   and make it therefore active.  OUTSTREAM as NULL will pop the last pushed
   output stream; it is an internal error if it does not exist.  */

void
cli_ui_out::do_redirect (ui_file *outstream)
{
  if (outstream != NULL)
    m_streams.push_back (outstream);
  else
    m_streams.pop_back ();
}

/* Initialize a progress update to be displayed with
   cli_ui_out::do_progress_notify.  */

void
cli_ui_out::do_progress_start ()
{
  m_progress_info.emplace_back ();
}

#define MIN_CHARS_PER_LINE 50
#define MAX_CHARS_PER_LINE 4096

/* Print a progress update.  MSG is a string to be printed on the line above
   the progress bar.  TOTAL is the size of the download whose progress is
   being displayed.  UNIT should be the unit of TOTAL (ex. "K"). If HOWMUCH
   is between 0.0 and 1.0, a progress bar is displayed indicating the percentage
   of completion and the download size.  If HOWMUCH is negative, a progress
   indicator will tick across the screen.  If the output stream is not a tty
   then only MSG is printed.

   - printed for tty, HOWMUCH between 0.0 and 1.0:
	<MSG
	[#########                  ]  HOWMUCH*100% (TOTAL UNIT)\r>
   - printed for tty, HOWMUCH < 0.0:
	<MSG
	[    ###                    ]\r>
   - printed for not-a-tty:
	<MSG...\n>
*/

void
cli_ui_out::do_progress_notify (const std::string &msg,
				const char *unit,
				double howmuch, double total)
{
  int chars_per_line = get_chars_per_line ();
  struct ui_file *stream = m_streams.back ();
  cli_progress_info &info (m_progress_info.back ());

  if (chars_per_line > MAX_CHARS_PER_LINE)
    chars_per_line = MAX_CHARS_PER_LINE;

  if (info.state == progress_update::START)
    {
      if (stream->isatty ()
	  && current_ui->input_interactive_p ()
	  && chars_per_line >= MIN_CHARS_PER_LINE)
	{
	  gdb_printf (stream, "%s\n", msg.c_str ());
	  info.state = progress_update::BAR;
	}
      else
	{
	  gdb_printf (stream, "%s...\n", msg.c_str ());
	  info.state = progress_update::WORKING;
	}
    }

  if (info.state != progress_update::BAR
      || chars_per_line < MIN_CHARS_PER_LINE)
    return;

  if (total > 0 && howmuch >= 0 && howmuch <= 1.0)
    {
      std::string progress = string_printf (" %3.f%% (%.2f %s)",
					    howmuch * 100, total,
					    unit);
      int width = chars_per_line - progress.size () - 4;
      int max = width * howmuch;

      std::string display = "\r[";

      for (int i = 0; i < width; ++i)
	if (i < max)
	  display += "#";
	else
	  display += " ";

      display += "]" + progress;
      gdb_printf (stream, "%s", display.c_str ());
      gdb_flush (stream);
    }
  else
    {
      using namespace std::chrono;
      milliseconds diff = duration_cast<milliseconds>
	(steady_clock::now () - info.last_update);

      /* Advance the progress indicator at a rate of 1 tick every
	 every 0.5 seconds.  */
      if (diff.count () >= 500)
	{
	  int width = chars_per_line - 4;

	  gdb_printf (stream, "\r[");
	  for (int i = 0; i < width; ++i)
	    {
	      if (i == info.pos % width
		  || i == (info.pos + 1) % width
		  || i == (info.pos + 2) % width)
		gdb_printf (stream, "#");
	      else
		gdb_printf (stream, " ");
	    }

	  gdb_printf (stream, "]");
	  gdb_flush (stream);
	  info.last_update = steady_clock::now ();
	  info.pos++;
	}
    }

  return;
}

/* Clear the current line of the most recent progress update.  Overwrites
   the current line with whitespace.  */

void
cli_ui_out::clear_current_line ()
{
  struct ui_file *stream = m_streams.back ();
  int chars_per_line = get_chars_per_line ();

  if (!stream->isatty ()
      || !current_ui->input_interactive_p ()
      || chars_per_line < MIN_CHARS_PER_LINE)
    return;

  if (chars_per_line > MAX_CHARS_PER_LINE)
    chars_per_line = MAX_CHARS_PER_LINE;

  gdb_printf (stream, "\r");
  for (int i = 0; i < chars_per_line; ++i)
    gdb_printf (stream, " ");
  gdb_printf (stream, "\r");

  gdb_flush (stream);
}

/* Remove the most recent progress update from the progress_info stack
   and overwrite the current line with whitespace.  */

void
cli_ui_out::do_progress_end ()
{
  struct ui_file *stream = m_streams.back ();
  m_progress_info.pop_back ();

  if (stream->isatty ())
    clear_current_line ();
}

/* local functions */

void
cli_ui_out::field_separator ()
{
  gdb_putc (' ', m_streams.back ());
}

/* Constructor for cli_ui_out.  */

cli_ui_out::cli_ui_out (ui_file *stream, ui_out_flags flags)
: ui_out (flags),
  m_suppress_output (false)
{
  gdb_assert (stream != NULL);

  m_streams.push_back (stream);
}

cli_ui_out::~cli_ui_out ()
{
}

ui_file *
cli_ui_out::set_stream (struct ui_file *stream)
{
  ui_file *old;

  old = m_streams.back ();
  m_streams.back () = stream;

  return old;
}

bool
cli_ui_out::can_emit_style_escape () const
{
  return m_streams.back ()->can_emit_style_escape ();
}

/* CLI interface to display tab-completion matches.  */

/* CLI version of displayer.crlf.  */

static void
cli_mld_crlf (const struct match_list_displayer *displayer)
{
  rl_crlf ();
}

/* CLI version of displayer.putch.  */

static void
cli_mld_putch (const struct match_list_displayer *displayer, int ch)
{
  putc (ch, rl_outstream);
}

/* CLI version of displayer.puts.  */

static void
cli_mld_puts (const struct match_list_displayer *displayer, const char *s)
{
  fputs (s, rl_outstream);
}

/* CLI version of displayer.flush.  */

static void
cli_mld_flush (const struct match_list_displayer *displayer)
{
  fflush (rl_outstream);
}

EXTERN_C void _rl_erase_entire_line (void);

/* CLI version of displayer.erase_entire_line.  */

static void
cli_mld_erase_entire_line (const struct match_list_displayer *displayer)
{
  _rl_erase_entire_line ();
}

/* CLI version of displayer.beep.  */

static void
cli_mld_beep (const struct match_list_displayer *displayer)
{
  rl_ding ();
}

/* CLI version of displayer.read_key.  */

static int
cli_mld_read_key (const struct match_list_displayer *displayer)
{
  return rl_read_key ();
}

/* CLI version of rl_completion_display_matches_hook.
   See gdb_display_match_list for a description of the arguments.  */

void
cli_display_match_list (char **matches, int len, int max)
{
  struct match_list_displayer displayer;

  rl_get_screen_size (&displayer.height, &displayer.width);
  displayer.crlf = cli_mld_crlf;
  displayer.putch = cli_mld_putch;
  displayer.puts = cli_mld_puts;
  displayer.flush = cli_mld_flush;
  displayer.erase_entire_line = cli_mld_erase_entire_line;
  displayer.beep = cli_mld_beep;
  displayer.read_key = cli_mld_read_key;

  gdb_display_match_list (matches, len, max, &displayer);
  rl_forced_update_display ();
}