1 /* Output generating routines for GDB.
3 Copyright (C) 1999-2019 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 */
34 /* A header of a ui_out_table. */
40 explicit ui_out_hdr (int number, int min_width, ui_align alignment,
41 const std::string &name, const std::string &header)
43 m_min_width (min_width),
44 m_alignment (alignment),
55 int min_width () const
60 ui_align alignment () const
65 const std::string &header () const
70 const std::string &name () const
77 /* The number of the table column this header represents, 1-based. */
80 /* Minimal column width in characters. May or may not be applicable,
81 depending on the actual implementation of ui_out. */
84 /* Alignment of the content in the column. May or may not be applicable,
85 depending on the actual implementation of ui_out. */
88 /* Internal column name, used to internally refer to the column. */
91 /* Printed header text of the column. */
97 /* A level of nesting (either a list or a tuple) in a ui_out output. */
103 explicit ui_out_level (ui_out_type type)
109 ui_out_type type () const
114 int field_count () const
116 return m_field_count;
119 void inc_field_count ()
126 /* The type of this level. */
129 /* Count each field; the first element is for non-list fields. */
133 /* Tables are special. Maintain a separate structure that tracks
134 their state. At present an output can only contain a single table
135 but that restriction might eventually be lifted. */
141 /* States (steps) of a table generation. */
145 /* We are generating the table headers. */
148 /* We are generating the table body. */
152 explicit ui_out_table (int entry_level, int nr_cols, const std::string &id)
153 : m_state (state::HEADERS),
154 m_entry_level (entry_level),
160 /* Start building the body of the table. */
164 /* Add a new header to the table. */
166 void append_header (int width, ui_align alignment,
167 const std::string &col_name, const std::string &col_hdr);
171 /* Extract the format information for the next header and advance
172 the header iterator. Return false if there was no next header. */
174 bool get_next_header (int *colno, int *width, ui_align *alignment,
175 const char **col_hdr);
177 bool query_field (int colno, int *width, int *alignment,
178 const char **col_name) const;
180 state current_state () const;
182 int entry_level () const;
188 /* The level at which each entry of the table is to be found. A row
189 (a tuple) is made up of entries. Consequently ENTRY_LEVEL is one
190 above that of the table. */
193 /* Number of table columns (as specified in the table_begin call). */
196 /* String identifying the table (as specified in the table_begin
200 /* Pointers to the column headers. */
201 std::vector<std::unique_ptr<ui_out_hdr>> m_headers;
203 /* Iterator over the headers vector, used when printing successive fields. */
204 std::vector<std::unique_ptr<ui_out_hdr>>::const_iterator m_headers_iterator;
209 void ui_out_table::start_body ()
211 if (m_state != state::HEADERS)
212 internal_error (__FILE__, __LINE__,
213 _("extra table_body call not allowed; there must be only "
214 "one table_body after a table_begin and before a "
217 /* Check if the number of defined headers matches the number of expected
219 if (m_headers.size () != m_nr_cols)
220 internal_error (__FILE__, __LINE__,
221 _("number of headers differ from number of table "
224 m_state = state::BODY;
225 m_headers_iterator = m_headers.begin ();
230 void ui_out_table::append_header (int width, ui_align alignment,
231 const std::string &col_name,
232 const std::string &col_hdr)
234 if (m_state != state::HEADERS)
235 internal_error (__FILE__, __LINE__,
236 _("table header must be specified after table_begin and "
237 "before table_body."));
239 std::unique_ptr<ui_out_hdr> header (new ui_out_hdr (m_headers.size () + 1,
243 m_headers.push_back (std::move (header));
248 void ui_out_table::start_row ()
250 m_headers_iterator = m_headers.begin ();
255 bool ui_out_table::get_next_header (int *colno, int *width, ui_align *alignment,
256 const char **col_hdr)
258 /* There may be no headers at all or we may have used all columns. */
259 if (m_headers_iterator == m_headers.end ())
262 ui_out_hdr *hdr = m_headers_iterator->get ();
264 *colno = hdr->number ();
265 *width = hdr->min_width ();
266 *alignment = hdr->alignment ();
267 *col_hdr = hdr->header ().c_str ();
269 /* Advance the header pointer to the next entry. */
270 m_headers_iterator++;
277 bool ui_out_table::query_field (int colno, int *width, int *alignment,
278 const char **col_name) const
280 /* Column numbers are 1-based, so convert to 0-based index. */
281 int index = colno - 1;
283 if (index >= 0 && index < m_headers.size ())
285 ui_out_hdr *hdr = m_headers[index].get ();
287 gdb_assert (colno == hdr->number ());
289 *width = hdr->min_width ();
290 *alignment = hdr->alignment ();
291 *col_name = hdr->name ().c_str ();
301 ui_out_table::state ui_out_table::current_state () const
308 int ui_out_table::entry_level () const
310 return m_entry_level;
314 ui_out::level () const
316 return m_levels.size ();
319 /* The current (inner most) level. */
322 ui_out::current_level () const
324 return m_levels.back ().get ();
327 /* Create a new level, of TYPE. */
329 ui_out::push_level (ui_out_type type)
331 std::unique_ptr<ui_out_level> level (new ui_out_level (type));
333 m_levels.push_back (std::move (level));
336 /* Discard the current level. TYPE is the type of the level being
339 ui_out::pop_level (ui_out_type type)
341 /* We had better not underflow the buffer. */
342 gdb_assert (m_levels.size () > 0);
343 gdb_assert (current_level ()->type () == type);
345 m_levels.pop_back ();
348 /* Mark beginning of a table. */
351 ui_out::table_begin (int nr_cols, int nr_rows, const std::string &tblid)
353 if (m_table_up != nullptr)
354 internal_error (__FILE__, __LINE__,
355 _("tables cannot be nested; table_begin found before \
356 previous table_end."));
358 m_table_up.reset (new ui_out_table (level () + 1, nr_cols, tblid));
360 do_table_begin (nr_cols, nr_rows, tblid.c_str ());
364 ui_out::table_header (int width, ui_align alignment,
365 const std::string &col_name, const std::string &col_hdr)
367 if (m_table_up == nullptr)
368 internal_error (__FILE__, __LINE__,
369 _("table_header outside a table is not valid; it must be \
370 after a table_begin and before a table_body."));
372 m_table_up->append_header (width, alignment, col_name, col_hdr);
374 do_table_header (width, alignment, col_name, col_hdr);
378 ui_out::table_body ()
380 if (m_table_up == nullptr)
381 internal_error (__FILE__, __LINE__,
382 _("table_body outside a table is not valid; it must be "
383 "after a table_begin and before a table_end."));
385 m_table_up->start_body ();
393 if (m_table_up == nullptr)
394 internal_error (__FILE__, __LINE__,
395 _("misplaced table_end or missing table_begin."));
399 m_table_up = nullptr;
403 ui_out::begin (ui_out_type type, const char *id)
405 /* Be careful to verify the ``field'' before the new tuple/list is
406 pushed onto the stack. That way the containing list/table/row is
407 verified and not the newly created tuple/list. This verification
408 is needed (at least) for the case where a table row entry
409 contains either a tuple/list. For that case bookkeeping such as
410 updating the column count or advancing to the next heading still
411 needs to be performed. */
417 verify_field (&fldno, &width, &align);
422 /* If the push puts us at the same level as a table row entry, we've
423 got a new table row. Put the header pointer back to the start. */
424 if (m_table_up != nullptr
425 && m_table_up->current_state () == ui_out_table::state::BODY
426 && m_table_up->entry_level () == level ())
427 m_table_up->start_row ();
433 ui_out::end (ui_out_type type)
441 ui_out::field_signed (const char *fldname, LONGEST value)
447 verify_field (&fldno, &width, &align);
449 do_field_signed (fldno, width, align, fldname, value);
453 ui_out::field_fmt_signed (int input_width, ui_align input_align,
454 const char *fldname, LONGEST value)
460 verify_field (&fldno, &width, &align);
462 do_field_signed (fldno, input_width, input_align, fldname, value);
468 ui_out::field_unsigned (const char *fldname, ULONGEST value)
474 verify_field (&fldno, &width, &align);
476 do_field_unsigned (fldno, width, align, fldname, value);
479 /* Documented in ui-out.h. */
482 ui_out::field_core_addr (const char *fldname, struct gdbarch *gdbarch,
485 field_string (fldname, print_core_address (gdbarch, address),
486 ui_out_style_kind::ADDRESS);
490 ui_out::field_stream (const char *fldname, string_file &stream,
491 ui_out_style_kind style)
493 if (!stream.empty ())
494 field_string (fldname, stream.c_str (), style);
496 field_skip (fldname);
500 /* Used to omit a field. */
503 ui_out::field_skip (const char *fldname)
509 verify_field (&fldno, &width, &align);
511 do_field_skip (fldno, width, align, fldname);
515 ui_out::field_string (const char *fldname, const char *string,
516 ui_out_style_kind style)
522 verify_field (&fldno, &width, &align);
524 do_field_string (fldno, width, align, fldname, string, style);
528 ui_out::field_string (const char *fldname, const std::string &string)
530 field_string (fldname, string.c_str ());
535 ui_out::field_fmt (const char *fldname, const char *format, ...)
542 verify_field (&fldno, &width, &align);
544 va_start (args, format);
546 do_field_fmt (fldno, width, align, fldname, format, args);
552 ui_out::spaces (int numspaces)
554 do_spaces (numspaces);
558 ui_out::text (const char *string)
564 ui_out::message (const char *format, ...)
568 va_start (args, format);
569 do_message (format, args);
574 ui_out::wrap_hint (const char *identstring)
576 do_wrap_hint (identstring);
586 ui_out::redirect (ui_file *outstream)
588 do_redirect (outstream);
591 /* Test the flags against the mask given. */
593 ui_out::test_flags (ui_out_flags mask)
595 return m_flags & mask;
599 ui_out::is_mi_like_p () const
601 return do_is_mi_like_p ();
604 /* Verify that the field/tuple/list is correctly positioned. Return
605 the field number and corresponding alignment (if
606 available/applicable). */
609 ui_out::verify_field (int *fldno, int *width, ui_align *align)
611 ui_out_level *current = current_level ();
614 if (m_table_up != nullptr
615 && m_table_up->current_state () != ui_out_table::state::BODY)
617 internal_error (__FILE__, __LINE__,
618 _("table_body missing; table fields must be \
619 specified after table_body and inside a list."));
622 current->inc_field_count ();
624 if (m_table_up != nullptr
625 && m_table_up->current_state () == ui_out_table::state::BODY
626 && m_table_up->entry_level () == level ()
627 && m_table_up->get_next_header (fldno, width, align, &text))
629 if (*fldno != current->field_count ())
630 internal_error (__FILE__, __LINE__,
631 _("ui-out internal error in handling headers."));
637 *fldno = current->field_count ();
641 /* Access table field parameters. */
644 ui_out::query_table_field (int colno, int *width, int *alignment,
645 const char **col_name)
647 if (m_table_up == nullptr)
650 return m_table_up->query_field (colno, width, alignment, col_name);
653 /* The constructor. */
655 ui_out::ui_out (ui_out_flags flags)
658 /* Create the ui-out level #1, the default level. */
659 push_level (ui_out_type_tuple);