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 */
32 /* A header of a ui_out_table. */
38 explicit ui_out_hdr (int number, int min_width, ui_align alignment,
39 const std::string &name, const std::string &header)
41 m_min_width (min_width),
42 m_alignment (alignment),
53 int min_width () const
58 ui_align alignment () const
63 const std::string &header () const
68 const std::string &name () const
75 /* The number of the table column this header represents, 1-based. */
78 /* Minimal column width in characters. May or may not be applicable,
79 depending on the actual implementation of ui_out. */
82 /* Alignment of the content in the column. May or may not be applicable,
83 depending on the actual implementation of ui_out. */
86 /* Internal column name, used to internally refer to the column. */
89 /* Printed header text of the column. */
93 /* A level of nesting (either a list or a tuple) in a ui_out output. */
99 explicit ui_out_level (ui_out_type type)
105 ui_out_type type () const
110 int field_count () const
112 return m_field_count;
115 void inc_field_count ()
122 /* The type of this level. */
125 /* Count each field; the first element is for non-list fields. */
129 /* Tables are special. Maintain a separate structure that tracks
130 their state. At present an output can only contain a single table
131 but that restriction might eventually be lifted. */
137 /* States (steps) of a table generation. */
141 /* We are generating the table headers. */
144 /* We are generating the table body. */
148 explicit ui_out_table (int entry_level, int nr_cols, const std::string &id)
149 : m_state (state::HEADERS),
150 m_entry_level (entry_level),
156 /* Start building the body of the table. */
160 /* Add a new header to the table. */
162 void append_header (int width, ui_align alignment,
163 const std::string &col_name, const std::string &col_hdr);
167 /* Extract the format information for the next header and advance
168 the header iterator. Return false if there was no next header. */
170 bool get_next_header (int *colno, int *width, ui_align *alignment,
171 const char **col_hdr);
173 bool query_field (int colno, int *width, int *alignment,
174 const char **col_name) const;
176 state current_state () const;
178 int entry_level () const;
184 /* The level at which each entry of the table is to be found. A row
185 (a tuple) is made up of entries. Consequently ENTRY_LEVEL is one
186 above that of the table. */
189 /* Number of table columns (as specified in the table_begin call). */
192 /* String identifying the table (as specified in the table_begin
196 /* Pointers to the column headers. */
197 std::vector<std::unique_ptr<ui_out_hdr>> m_headers;
199 /* Iterator over the headers vector, used when printing successive fields. */
200 std::vector<std::unique_ptr<ui_out_hdr>>::const_iterator m_headers_iterator;
205 void ui_out_table::start_body ()
207 if (m_state != state::HEADERS)
208 internal_error (__FILE__, __LINE__,
209 _("extra table_body call not allowed; there must be only "
210 "one table_body after a table_begin and before a "
213 /* Check if the number of defined headers matches the number of expected
215 if (m_headers.size () != m_nr_cols)
216 internal_error (__FILE__, __LINE__,
217 _("number of headers differ from number of table "
220 m_state = state::BODY;
221 m_headers_iterator = m_headers.begin ();
226 void ui_out_table::append_header (int width, ui_align alignment,
227 const std::string &col_name,
228 const std::string &col_hdr)
230 if (m_state != state::HEADERS)
231 internal_error (__FILE__, __LINE__,
232 _("table header must be specified after table_begin and "
233 "before table_body."));
235 std::unique_ptr<ui_out_hdr> header (new ui_out_hdr (m_headers.size () + 1,
239 m_headers.push_back (std::move (header));
244 void ui_out_table::start_row ()
246 m_headers_iterator = m_headers.begin ();
251 bool ui_out_table::get_next_header (int *colno, int *width, ui_align *alignment,
252 const char **col_hdr)
254 /* There may be no headers at all or we may have used all columns. */
255 if (m_headers_iterator == m_headers.end ())
258 ui_out_hdr *hdr = m_headers_iterator->get ();
260 *colno = hdr->number ();
261 *width = hdr->min_width ();
262 *alignment = hdr->alignment ();
263 *col_hdr = hdr->header ().c_str ();
265 /* Advance the header pointer to the next entry. */
266 m_headers_iterator++;
273 bool ui_out_table::query_field (int colno, int *width, int *alignment,
274 const char **col_name) const
276 /* Column numbers are 1-based, so convert to 0-based index. */
277 int index = colno - 1;
279 if (index >= 0 && index < m_headers.size ())
281 ui_out_hdr *hdr = m_headers[index].get ();
283 gdb_assert (colno == hdr->number ());
285 *width = hdr->min_width ();
286 *alignment = hdr->alignment ();
287 *col_name = hdr->name ().c_str ();
297 ui_out_table::state ui_out_table::current_state () const
304 int ui_out_table::entry_level () const
306 return m_entry_level;
309 /* The ui_out structure */
314 /* Specific implementation of ui-out. */
315 const struct ui_out_impl *impl;
318 /* Vector to store and track the ui-out levels. */
319 std::vector<std::unique_ptr<ui_out_level>> levels;
323 return this->levels.size ();
326 /* A table, if any. At present only a single table is supported. */
327 std::unique_ptr<ui_out_table> table;
330 /* The current (inner most) level. */
331 static ui_out_level *
332 current_level (struct ui_out *uiout)
334 return uiout->levels.back ().get ();
337 /* Create a new level, of TYPE. */
339 push_level (struct ui_out *uiout,
340 enum ui_out_type type)
342 std::unique_ptr<ui_out_level> level (new ui_out_level (type));
344 uiout->levels.push_back (std::move (level));
347 /* Discard the current level. TYPE is the type of the level being
350 pop_level (struct ui_out *uiout,
351 enum ui_out_type type)
353 /* We had better not underflow the buffer. */
354 gdb_assert (uiout->level () > 0);
355 gdb_assert (current_level (uiout)->type () == type);
357 uiout->levels.pop_back ();
360 /* These are the interfaces to implementation functions. */
362 static void uo_table_begin (struct ui_out *uiout, int nbrofcols,
363 int nr_rows, const char *tblid);
364 static void uo_table_body (struct ui_out *uiout);
365 static void uo_table_end (struct ui_out *uiout);
366 static void uo_table_header (struct ui_out *uiout, int width,
368 const std::string &col_name,
369 const std::string &col_hdr);
370 static void uo_begin (struct ui_out *uiout,
371 enum ui_out_type type,
373 static void uo_end (struct ui_out *uiout,
374 enum ui_out_type type);
375 static void uo_field_int (struct ui_out *uiout, int fldno, int width,
376 enum ui_align align, const char *fldname, int value);
377 static void uo_field_skip (struct ui_out *uiout, int fldno, int width,
378 enum ui_align align, const char *fldname);
379 static void uo_field_fmt (struct ui_out *uiout, int fldno, int width,
380 enum ui_align align, const char *fldname,
381 const char *format, va_list args)
382 ATTRIBUTE_PRINTF (6, 0);
383 static void uo_spaces (struct ui_out *uiout, int numspaces);
384 static void uo_text (struct ui_out *uiout, const char *string);
385 static void uo_message (struct ui_out *uiout,
386 const char *format, va_list args)
387 ATTRIBUTE_PRINTF (2, 0);
388 static void uo_wrap_hint (struct ui_out *uiout, const char *identstring);
389 static void uo_flush (struct ui_out *uiout);
390 static int uo_redirect (struct ui_out *uiout, struct ui_file *outstream);
392 /* Prototypes for local functions */
394 static void verify_field (struct ui_out *uiout, int *fldno, int *width,
395 enum ui_align *align);
397 /* exported functions (ui_out API) */
399 /* Mark beginning of a table. */
402 ui_out_table_begin (struct ui_out *uiout, int nr_cols,
403 int nr_rows, const std::string &tblid)
405 if (uiout->table != nullptr)
406 internal_error (__FILE__, __LINE__,
407 _("tables cannot be nested; table_begin found before \
408 previous table_end."));
411 new ui_out_table (uiout->level () + 1, nr_cols, tblid));
413 uo_table_begin (uiout, nr_cols, nr_rows, tblid.c_str ());
417 ui_out_table_body (struct ui_out *uiout)
419 if (uiout->table == nullptr)
420 internal_error (__FILE__, __LINE__,
421 _("table_body outside a table is not valid; it must be \
422 after a table_begin and before a table_end."));
424 uiout->table->start_body ();
426 uo_table_body (uiout);
430 ui_out_table_end (struct ui_out *uiout)
432 if (uiout->table == nullptr)
433 internal_error (__FILE__, __LINE__,
434 _("misplaced table_end or missing table_begin."));
436 uo_table_end (uiout);
438 uiout->table = nullptr;
442 ui_out_table_header (struct ui_out *uiout, int width, enum ui_align alignment,
443 const std::string &col_name, const std::string &col_hdr)
445 if (uiout->table == nullptr)
446 internal_error (__FILE__, __LINE__,
447 _("table_header outside a table is not valid; it must be "
448 "after a table_begin and before a table_body."));
450 uiout->table->append_header (width, alignment, col_name, col_hdr);
452 uo_table_header (uiout, width, alignment, col_name, col_hdr);
456 do_cleanup_table_end (void *data)
458 struct ui_out *ui_out = (struct ui_out *) data;
460 ui_out_table_end (ui_out);
464 make_cleanup_ui_out_table_begin_end (struct ui_out *ui_out, int nr_cols,
465 int nr_rows, const char *tblid)
467 ui_out_table_begin (ui_out, nr_cols, nr_rows, tblid);
468 return make_cleanup (do_cleanup_table_end, ui_out);
472 ui_out_begin (struct ui_out *uiout,
473 enum ui_out_type type,
476 /* Be careful to verify the ``field'' before the new tuple/list is
477 pushed onto the stack. That way the containing list/table/row is
478 verified and not the newly created tuple/list. This verification
479 is needed (at least) for the case where a table row entry
480 contains either a tuple/list. For that case bookkeeping such as
481 updating the column count or advancing to the next heading still
482 needs to be performed. */
488 verify_field (uiout, &fldno, &width, &align);
491 push_level (uiout, type);
493 /* If the push puts us at the same level as a table row entry, we've
494 got a new table row. Put the header pointer back to the start. */
495 if (uiout->table != nullptr
496 && uiout->table->current_state () == ui_out_table::state::BODY
497 && uiout->table->entry_level () == uiout->level ())
498 uiout->table->start_row ();
500 uo_begin (uiout, type, id);
504 ui_out_end (struct ui_out *uiout,
505 enum ui_out_type type)
507 pop_level (uiout, type);
509 uo_end (uiout, type);
512 struct ui_out_end_cleanup_data
514 struct ui_out *uiout;
515 enum ui_out_type type;
519 do_cleanup_end (void *data)
521 struct ui_out_end_cleanup_data *end_cleanup_data
522 = (struct ui_out_end_cleanup_data *) data;
524 ui_out_end (end_cleanup_data->uiout, end_cleanup_data->type);
525 xfree (end_cleanup_data);
528 static struct cleanup *
529 make_cleanup_ui_out_end (struct ui_out *uiout,
530 enum ui_out_type type)
532 struct ui_out_end_cleanup_data *end_cleanup_data;
534 end_cleanup_data = XNEW (struct ui_out_end_cleanup_data);
535 end_cleanup_data->uiout = uiout;
536 end_cleanup_data->type = type;
537 return make_cleanup (do_cleanup_end, end_cleanup_data);
541 make_cleanup_ui_out_tuple_begin_end (struct ui_out *uiout,
544 ui_out_begin (uiout, ui_out_type_tuple, id);
545 return make_cleanup_ui_out_end (uiout, ui_out_type_tuple);
549 make_cleanup_ui_out_list_begin_end (struct ui_out *uiout,
552 ui_out_begin (uiout, ui_out_type_list, id);
553 return make_cleanup_ui_out_end (uiout, ui_out_type_list);
557 ui_out_field_int (struct ui_out *uiout,
565 verify_field (uiout, &fldno, &width, &align);
567 uo_field_int (uiout, fldno, width, align, fldname, value);
571 ui_out_field_fmt_int (struct ui_out *uiout,
573 enum ui_align input_align,
581 verify_field (uiout, &fldno, &width, &align);
583 uo_field_int (uiout, fldno, input_width, input_align, fldname, value);
586 /* Documented in ui-out.h. */
589 ui_out_field_core_addr (struct ui_out *uiout,
591 struct gdbarch *gdbarch,
594 ui_out_field_string (uiout, fldname,
595 print_core_address (gdbarch, address));
599 ui_out_field_stream (struct ui_out *uiout,
601 struct ui_file *stream)
603 std::string buffer = ui_file_as_string (stream);
605 if (!buffer.empty ())
606 ui_out_field_string (uiout, fldname, buffer.c_str ());
608 ui_out_field_skip (uiout, fldname);
609 ui_file_rewind (stream);
612 /* Used to omit a field. */
615 ui_out_field_skip (struct ui_out *uiout,
622 verify_field (uiout, &fldno, &width, &align);
624 uo_field_skip (uiout, fldno, width, align, fldname);
628 ui_out_field_string (struct ui_out *uiout,
636 verify_field (uiout, &fldno, &width, &align);
638 uo_field_string (uiout, fldno, width, align, fldname, string);
643 ui_out_field_fmt (struct ui_out *uiout,
645 const char *format, ...)
652 /* Will not align, but has to call anyway. */
653 verify_field (uiout, &fldno, &width, &align);
655 va_start (args, format);
657 uo_field_fmt (uiout, fldno, width, align, fldname, format, args);
663 ui_out_spaces (struct ui_out *uiout, int numspaces)
665 uo_spaces (uiout, numspaces);
669 ui_out_text (struct ui_out *uiout,
672 uo_text (uiout, string);
676 ui_out_message (struct ui_out *uiout, const char *format, ...)
680 va_start (args, format);
681 uo_message (uiout, format, args);
686 ui_out_wrap_hint (struct ui_out *uiout, const char *identstring)
688 uo_wrap_hint (uiout, identstring);
692 ui_out_flush (struct ui_out *uiout)
698 ui_out_redirect (struct ui_out *uiout, struct ui_file *outstream)
700 return uo_redirect (uiout, outstream);
703 /* Test the flags against the mask given. */
705 ui_out_test_flags (struct ui_out *uiout, ui_out_flags mask)
707 return (uiout->flags & mask);
711 ui_out_is_mi_like_p (struct ui_out *uiout)
713 return uiout->impl->is_mi_like_p;
716 /* Interface to the implementation functions. */
719 uo_table_begin (struct ui_out *uiout, int nbrofcols,
723 if (!uiout->impl->table_begin)
725 uiout->impl->table_begin (uiout, nbrofcols, nr_rows, tblid);
729 uo_table_body (struct ui_out *uiout)
731 if (!uiout->impl->table_body)
733 uiout->impl->table_body (uiout);
737 uo_table_end (struct ui_out *uiout)
739 if (!uiout->impl->table_end)
741 uiout->impl->table_end (uiout);
745 uo_table_header (struct ui_out *uiout, int width, enum ui_align align,
746 const std::string &col_name, const std::string &col_hdr)
748 if (!uiout->impl->table_header)
750 uiout->impl->table_header (uiout, width, align, col_name, col_hdr);
754 uo_begin (struct ui_out *uiout,
755 enum ui_out_type type,
758 if (uiout->impl->begin == NULL)
760 uiout->impl->begin (uiout, type, id);
764 uo_end (struct ui_out *uiout,
765 enum ui_out_type type)
767 if (uiout->impl->end == NULL)
769 uiout->impl->end (uiout, type);
773 uo_field_int (struct ui_out *uiout, int fldno, int width, enum ui_align align,
777 if (!uiout->impl->field_int)
779 uiout->impl->field_int (uiout, fldno, width, align, fldname, value);
783 uo_field_skip (struct ui_out *uiout, int fldno, int width, enum ui_align align,
786 if (!uiout->impl->field_skip)
788 uiout->impl->field_skip (uiout, fldno, width, align, fldname);
792 uo_field_string (struct ui_out *uiout, int fldno, int width,
797 if (!uiout->impl->field_string)
799 uiout->impl->field_string (uiout, fldno, width, align, fldname, string);
803 uo_field_fmt (struct ui_out *uiout, int fldno, int width, enum ui_align align,
808 if (!uiout->impl->field_fmt)
810 uiout->impl->field_fmt (uiout, fldno, width, align, fldname, format, args);
814 uo_spaces (struct ui_out *uiout, int numspaces)
816 if (!uiout->impl->spaces)
818 uiout->impl->spaces (uiout, numspaces);
822 uo_text (struct ui_out *uiout,
825 if (!uiout->impl->text)
827 uiout->impl->text (uiout, string);
831 uo_message (struct ui_out *uiout,
835 if (!uiout->impl->message)
837 uiout->impl->message (uiout, format, args);
841 uo_wrap_hint (struct ui_out *uiout, const char *identstring)
843 if (!uiout->impl->wrap_hint)
845 uiout->impl->wrap_hint (uiout, identstring);
849 uo_flush (struct ui_out *uiout)
851 if (!uiout->impl->flush)
853 uiout->impl->flush (uiout);
857 uo_redirect (struct ui_out *uiout, struct ui_file *outstream)
859 if (!uiout->impl->redirect)
861 return uiout->impl->redirect (uiout, outstream);
864 /* Verify that the field/tuple/list is correctly positioned. Return
865 the field number and corresponding alignment (if
866 available/applicable). */
869 verify_field (struct ui_out *uiout, int *fldno, int *width,
870 enum ui_align *align)
872 ui_out_level *current = current_level (uiout);
875 if (uiout->table != nullptr
876 && uiout->table->current_state () != ui_out_table::state::BODY)
878 internal_error (__FILE__, __LINE__,
879 _("table_body missing; table fields must be \
880 specified after table_body and inside a list."));
883 current->inc_field_count ();
885 if (uiout->table != nullptr
886 && uiout->table->current_state () == ui_out_table::state::BODY
887 && uiout->table->entry_level () == uiout->level ()
888 && uiout->table->get_next_header (fldno, width, align, &text))
890 if (*fldno != current->field_count ())
891 internal_error (__FILE__, __LINE__,
892 _("ui-out internal error in handling headers."));
898 *fldno = current->field_count ();
903 /* Access to ui-out members data. */
906 ui_out_data (struct ui_out *uiout)
911 /* Access table field parameters. */
913 ui_out_query_field (struct ui_out *uiout, int colno,
914 int *width, int *alignment, const char **col_name)
916 if (uiout->table == nullptr)
919 return uiout->table->query_field (colno, width, alignment, col_name);
922 /* Initialize private members at startup. */
925 ui_out_new (const struct ui_out_impl *impl, void *data,
928 struct ui_out *uiout = new ui_out ();
932 uiout->flags = flags;
934 /* Create the ui-out level #1, the default level. */
935 push_level (uiout, ui_out_type_tuple);