1 /* Output generating routines for GDB.
3 Copyright (C) 1999-2016 Free Software Foundation, Inc.
5 Contributed by Cygnus Solutions.
6 Written by Fernando Nasser for Cygnus.
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "expression.h" /* For language.h */
33 /* A header of a ui_out_table. */
39 explicit ui_out_hdr (int number, int min_width, ui_align alignment,
40 const std::string &name, const std::string &header)
42 m_min_width (min_width),
43 m_alignment (alignment),
54 int min_width () const
59 ui_align alignment () const
64 const std::string &header () const
69 const std::string &name () const
76 /* The number of the table column this header represents, 1-based. */
79 /* Minimal column width in characters. May or may not be applicable,
80 depending on the actual implementation of ui_out. */
83 /* Alignment of the content in the column. May or may not be applicable,
84 depending on the actual implementation of ui_out. */
87 /* Internal column name, used to internally refer to the column. */
90 /* Printed header text of the column. */
94 /* A level of nesting (either a list or a tuple) in a ui_out output. */
100 explicit ui_out_level (ui_out_type type)
106 ui_out_type type () const
111 int field_count () const
113 return m_field_count;
116 void inc_field_count ()
123 /* The type of this level. */
126 /* Count each field; the first element is for non-list fields. */
130 /* Tables are special. Maintain a separate structure that tracks
131 their state. At present an output can only contain a single table
132 but that restriction might eventually be lifted. */
138 /* States (steps) of a table generation. */
142 /* We are generating the table headers. */
145 /* We are generating the table body. */
149 explicit ui_out_table (int entry_level, int nr_cols, const std::string &id)
150 : m_state (state::HEADERS),
151 m_entry_level (entry_level),
157 /* Start building the body of the table. */
161 /* Add a new header to the table. */
163 void append_header (int width, ui_align alignment,
164 const std::string &col_name, const std::string &col_hdr);
168 /* Extract the format information for the next header and advance
169 the header iterator. Return false if there was no next header. */
171 bool get_next_header (int *colno, int *width, ui_align *alignment,
172 const char **col_hdr);
174 bool query_field (int colno, int *width, int *alignment,
175 const char **col_name) const;
177 state current_state () const;
179 int entry_level () const;
185 /* The level at which each entry of the table is to be found. A row
186 (a tuple) is made up of entries. Consequently ENTRY_LEVEL is one
187 above that of the table. */
190 /* Number of table columns (as specified in the table_begin call). */
193 /* String identifying the table (as specified in the table_begin
197 /* Pointers to the column headers. */
198 std::vector<std::unique_ptr<ui_out_hdr>> m_headers;
200 /* Iterator over the headers vector, used when printing successive fields. */
201 std::vector<std::unique_ptr<ui_out_hdr>>::const_iterator m_headers_iterator;
206 void ui_out_table::start_body ()
208 if (m_state != state::HEADERS)
209 internal_error (__FILE__, __LINE__,
210 _("extra table_body call not allowed; there must be only "
211 "one table_body after a table_begin and before a "
214 /* Check if the number of defined headers matches the number of expected
216 if (m_headers.size () != m_nr_cols)
217 internal_error (__FILE__, __LINE__,
218 _("number of headers differ from number of table "
221 m_state = state::BODY;
222 m_headers_iterator = m_headers.begin ();
227 void ui_out_table::append_header (int width, ui_align alignment,
228 const std::string &col_name,
229 const std::string &col_hdr)
231 if (m_state != state::HEADERS)
232 internal_error (__FILE__, __LINE__,
233 _("table header must be specified after table_begin and "
234 "before table_body."));
236 std::unique_ptr<ui_out_hdr> header (new ui_out_hdr (m_headers.size () + 1,
240 m_headers.push_back (std::move (header));
245 void ui_out_table::start_row ()
247 m_headers_iterator = m_headers.begin ();
252 bool ui_out_table::get_next_header (int *colno, int *width, ui_align *alignment,
253 const char **col_hdr)
255 /* There may be no headers at all or we may have used all columns. */
256 if (m_headers_iterator == m_headers.end ())
259 ui_out_hdr *hdr = m_headers_iterator->get ();
261 *colno = hdr->number ();
262 *width = hdr->min_width ();
263 *alignment = hdr->alignment ();
264 *col_hdr = hdr->header ().c_str ();
266 /* Advance the header pointer to the next entry. */
267 m_headers_iterator++;
274 bool ui_out_table::query_field (int colno, int *width, int *alignment,
275 const char **col_name) const
277 /* Column numbers are 1-based, so convert to 0-based index. */
278 int index = colno - 1;
280 if (index >= 0 && index < m_headers.size ())
282 ui_out_hdr *hdr = m_headers[index].get ();
284 gdb_assert (colno == hdr->number ());
286 *width = hdr->min_width ();
287 *alignment = hdr->alignment ();
288 *col_name = hdr->name ().c_str ();
298 ui_out_table::state ui_out_table::current_state () const
305 int ui_out_table::entry_level () const
307 return m_entry_level;
311 ui_out::level () const
313 return m_levels.size ();
316 /* The current (inner most) level. */
319 ui_out::current_level () const
321 return m_levels.back ().get ();
324 /* Create a new level, of TYPE. */
326 ui_out::push_level (ui_out_type type)
328 std::unique_ptr<ui_out_level> level (new ui_out_level (type));
330 m_levels.push_back (std::move (level));
333 /* Discard the current level. TYPE is the type of the level being
336 ui_out::pop_level (ui_out_type type)
338 /* We had better not underflow the buffer. */
339 gdb_assert (m_levels.size () > 0);
340 gdb_assert (current_level ()->type () == type);
342 m_levels.pop_back ();
345 /* Mark beginning of a table. */
348 ui_out::table_begin (int nr_cols, int nr_rows, const std::string &tblid)
350 if (m_table_up != nullptr)
351 internal_error (__FILE__, __LINE__,
352 _("tables cannot be nested; table_begin found before \
353 previous table_end."));
355 m_table_up.reset (new ui_out_table (level () + 1, nr_cols, tblid));
357 do_table_begin (nr_cols, nr_rows, tblid.c_str ());
361 ui_out::table_header (int width, ui_align alignment,
362 const std::string &col_name, const std::string &col_hdr)
364 if (m_table_up == nullptr)
365 internal_error (__FILE__, __LINE__,
366 _("table_header outside a table is not valid; it must be \
367 after a table_begin and before a table_body."));
369 m_table_up->append_header (width, alignment, col_name, col_hdr);
371 do_table_header (width, alignment, col_name, col_hdr);
375 ui_out::table_body ()
377 if (m_table_up == nullptr)
378 internal_error (__FILE__, __LINE__,
379 _("table_body outside a table is not valid; it must be "
380 "after a table_begin and before a table_end."));
382 m_table_up->start_body ();
390 if (m_table_up == nullptr)
391 internal_error (__FILE__, __LINE__,
392 _("misplaced table_end or missing table_begin."));
396 m_table_up = nullptr;
400 do_cleanup_table_end (void *data)
402 ui_out *uiout = (ui_out *) data;
408 make_cleanup_ui_out_table_begin_end (ui_out *uiout, int nr_cols, int nr_rows,
411 uiout->table_begin (nr_cols, nr_rows, tblid);
412 return make_cleanup (do_cleanup_table_end, uiout);
416 ui_out::begin (ui_out_type type, const char *id)
418 /* Be careful to verify the ``field'' before the new tuple/list is
419 pushed onto the stack. That way the containing list/table/row is
420 verified and not the newly created tuple/list. This verification
421 is needed (at least) for the case where a table row entry
422 contains either a tuple/list. For that case bookkeeping such as
423 updating the column count or advancing to the next heading still
424 needs to be performed. */
430 verify_field (&fldno, &width, &align);
435 /* If the push puts us at the same level as a table row entry, we've
436 got a new table row. Put the header pointer back to the start. */
437 if (m_table_up != nullptr
438 && m_table_up->current_state () == ui_out_table::state::BODY
439 && m_table_up->entry_level () == level ())
440 m_table_up->start_row ();
446 ui_out::end (ui_out_type type)
453 struct ui_out_end_cleanup_data
455 struct ui_out *uiout;
456 enum ui_out_type type;
460 do_cleanup_end (void *data)
462 struct ui_out_end_cleanup_data *end_cleanup_data
463 = (struct ui_out_end_cleanup_data *) data;
465 end_cleanup_data->uiout->end (end_cleanup_data->type);
466 xfree (end_cleanup_data);
469 static struct cleanup *
470 make_cleanup_ui_out_end (struct ui_out *uiout,
471 enum ui_out_type type)
473 struct ui_out_end_cleanup_data *end_cleanup_data;
475 end_cleanup_data = XNEW (struct ui_out_end_cleanup_data);
476 end_cleanup_data->uiout = uiout;
477 end_cleanup_data->type = type;
478 return make_cleanup (do_cleanup_end, end_cleanup_data);
482 make_cleanup_ui_out_tuple_begin_end (struct ui_out *uiout,
485 uiout->begin (ui_out_type_tuple, id);
486 return make_cleanup_ui_out_end (uiout, ui_out_type_tuple);
490 make_cleanup_ui_out_list_begin_end (struct ui_out *uiout,
493 uiout->begin (ui_out_type_list, id);
494 return make_cleanup_ui_out_end (uiout, ui_out_type_list);
498 ui_out::field_int (const char *fldname, int value)
504 verify_field (&fldno, &width, &align);
506 do_field_int (fldno, width, align, fldname, value);
510 ui_out::field_fmt_int (int input_width, ui_align input_align,
511 const char *fldname, int value)
517 verify_field (&fldno, &width, &align);
519 do_field_int (fldno, input_width, input_align, fldname, value);
522 /* Documented in ui-out.h. */
525 ui_out::field_core_addr (const char *fldname, struct gdbarch *gdbarch,
528 field_string (fldname, print_core_address (gdbarch, address));
532 ui_out::field_stream (const char *fldname, ui_file *stream)
534 std::string buffer = ui_file_as_string (stream);
536 if (!buffer.empty ())
537 field_string (fldname, buffer.c_str ());
539 field_skip (fldname);
540 ui_file_rewind (stream);
543 /* Used to omit a field. */
546 ui_out::field_skip (const char *fldname)
552 verify_field (&fldno, &width, &align);
554 do_field_skip (fldno, width, align, fldname);
558 ui_out::field_string (const char *fldname, const char *string)
564 verify_field (&fldno, &width, &align);
566 do_field_string (fldno, width, align, fldname, string);
571 ui_out::field_fmt (const char *fldname, const char *format, ...)
578 /* Will not align, but has to call anyway. */
579 verify_field (&fldno, &width, &align);
581 va_start (args, format);
583 do_field_fmt (fldno, width, align, fldname, format, args);
589 ui_out::spaces (int numspaces)
591 do_spaces (numspaces);
595 ui_out::text (const char *string)
601 ui_out::message (const char *format, ...)
605 va_start (args, format);
606 do_message (format, args);
611 ui_out::wrap_hint (const char *identstring)
613 do_wrap_hint (identstring);
623 ui_out::redirect (ui_file *outstream)
625 return do_redirect (outstream);
628 /* Test the flags against the mask given. */
630 ui_out::test_flags (ui_out_flags mask)
632 return m_flags & mask;
636 ui_out::is_mi_like_p ()
638 return do_is_mi_like_p ();
641 /* Verify that the field/tuple/list is correctly positioned. Return
642 the field number and corresponding alignment (if
643 available/applicable). */
646 ui_out::verify_field (int *fldno, int *width, ui_align *align)
648 ui_out_level *current = current_level ();
651 if (m_table_up != nullptr
652 && m_table_up->current_state () != ui_out_table::state::BODY)
654 internal_error (__FILE__, __LINE__,
655 _("table_body missing; table fields must be \
656 specified after table_body and inside a list."));
659 current->inc_field_count ();
661 if (m_table_up != nullptr
662 && m_table_up->current_state () == ui_out_table::state::BODY
663 && m_table_up->entry_level () == level ()
664 && m_table_up->get_next_header (fldno, width, align, &text))
666 if (*fldno != current->field_count ())
667 internal_error (__FILE__, __LINE__,
668 _("ui-out internal error in handling headers."));
674 *fldno = current->field_count ();
678 /* Access table field parameters. */
681 ui_out::query_table_field (int colno, int *width, int *alignment,
682 const char **col_name)
684 if (m_table_up == nullptr)
687 return m_table_up->query_field (colno, width, alignment, col_name);
690 /* The constructor. */
692 ui_out::ui_out (ui_out_flags flags)
695 /* Create the ui-out level #1, the default level. */
696 push_level (ui_out_type_tuple);