1 /* Output generating routines for GDB.
3 Copyright (C) 1999-2013 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 "gdb_string.h"
25 #include "expression.h" /* For language.h */
28 #include "gdb_assert.h"
30 /* table header structures */
39 struct ui_out_hdr *next;
42 /* Maintain a stack so that the info applicable to the inner most list
43 is always available. Stack/nested level 0 is reserved for the
46 enum { MAX_UI_OUT_LEVELS = 8 };
50 /* Count each field; the first element is for non-list fields. */
52 /* The type of this level. */
53 enum ui_out_type type;
56 /* Tables are special. Maintain a separate structure that tracks
57 their state. At present an output can only contain a single table
58 but that restriction might eventually be lifted. */
62 /* If on, a table is being generated. */
65 /* If on, the body of a table is being generated. If off, the table
66 header is being generated. */
69 /* The level at which each entry of the table is to be found. A row
70 (a tuple) is made up of entries. Consequently ENTRY_LEVEL is one
71 above that of the table. */
74 /* Number of table columns (as specified in the table_begin call). */
77 /* String identifying the table (as specified in the table_begin
81 /* Points to the first table header (if any). */
82 struct ui_out_hdr *header_first;
84 /* Points to the last table header (if any). */
85 struct ui_out_hdr *header_last;
87 /* Points to header of NEXT column to format. */
88 struct ui_out_hdr *header_next;
93 /* The ui_out structure */
94 /* Any change here requires a corresponding one in the initialization
95 of the default uiout, which is statically initialized. */
100 /* Specific implementation of ui-out. */
101 struct ui_out_impl *impl;
104 /* Sub structure tracking the ui-out depth. */
106 struct ui_out_level levels[MAX_UI_OUT_LEVELS];
108 /* A table, if any. At present only a single table is supported. */
109 struct ui_out_table table;
112 /* The current (inner most) level. */
113 static struct ui_out_level *
114 current_level (struct ui_out *uiout)
116 return &uiout->levels[uiout->level];
119 /* Create a new level, of TYPE. Return the new level's index. */
121 push_level (struct ui_out *uiout,
122 enum ui_out_type type,
125 struct ui_out_level *current;
127 /* We had better not overflow the buffer. */
129 gdb_assert (uiout->level >= 0 && uiout->level < MAX_UI_OUT_LEVELS);
130 current = current_level (uiout);
131 current->field_count = 0;
132 current->type = type;
136 /* Discard the current level, return the discarded level's index.
137 TYPE is the type of the level being discarded. */
139 pop_level (struct ui_out *uiout,
140 enum ui_out_type type)
142 /* We had better not underflow the buffer. */
143 gdb_assert (uiout->level > 0 && uiout->level < MAX_UI_OUT_LEVELS);
144 gdb_assert (current_level (uiout)->type == type);
146 return uiout->level + 1;
150 /* These are the default implementation functions. */
152 static void default_table_begin (struct ui_out *uiout, int nbrofcols,
153 int nr_rows, const char *tblid);
154 static void default_table_body (struct ui_out *uiout);
155 static void default_table_end (struct ui_out *uiout);
156 static void default_table_header (struct ui_out *uiout, int width,
157 enum ui_align alig, const char *col_name,
159 static void default_begin (struct ui_out *uiout,
160 enum ui_out_type type,
161 int level, const char *id);
162 static void default_end (struct ui_out *uiout,
163 enum ui_out_type type,
165 static void default_field_int (struct ui_out *uiout, int fldno, int width,
169 static void default_field_skip (struct ui_out *uiout, int fldno, int width,
171 const char *fldname);
172 static void default_field_string (struct ui_out *uiout, int fldno, int width,
176 static void default_field_fmt (struct ui_out *uiout, int fldno,
177 int width, enum ui_align align,
180 va_list args) ATTRIBUTE_PRINTF (6, 0);
181 static void default_spaces (struct ui_out *uiout, int numspaces);
182 static void default_text (struct ui_out *uiout, const char *string);
183 static void default_message (struct ui_out *uiout, int verbosity,
185 va_list args) ATTRIBUTE_PRINTF (3, 0);
186 static void default_wrap_hint (struct ui_out *uiout, char *identstring);
187 static void default_flush (struct ui_out *uiout);
188 static void default_data_destroy (struct ui_out *uiout);
190 /* This is the default ui-out implementation functions vector. */
192 struct ui_out_impl default_ui_out_impl =
197 default_table_header,
202 default_field_string,
210 default_data_destroy,
211 0, /* Does not need MI hacks. */
214 /* The default ui_out */
216 struct ui_out def_uiout =
219 &default_ui_out_impl, /* impl */
222 /* Pointer to current ui_out */
223 /* FIXME: This should not be a global, but something passed down from main.c
226 struct ui_out *current_uiout = &def_uiout;
228 /* These are the interfaces to implementation functions. */
230 static void uo_table_begin (struct ui_out *uiout, int nbrofcols,
231 int nr_rows, const char *tblid);
232 static void uo_table_body (struct ui_out *uiout);
233 static void uo_table_end (struct ui_out *uiout);
234 static void uo_table_header (struct ui_out *uiout, int width,
235 enum ui_align align, const char *col_name,
237 static void uo_begin (struct ui_out *uiout,
238 enum ui_out_type type,
239 int level, const char *id);
240 static void uo_end (struct ui_out *uiout,
241 enum ui_out_type type,
243 static void uo_field_int (struct ui_out *uiout, int fldno, int width,
244 enum ui_align align, const char *fldname, int value);
245 static void uo_field_skip (struct ui_out *uiout, int fldno, int width,
246 enum ui_align align, const char *fldname);
247 static void uo_field_fmt (struct ui_out *uiout, int fldno, int width,
248 enum ui_align align, const char *fldname,
249 const char *format, va_list args)
250 ATTRIBUTE_PRINTF (6, 0);
251 static void uo_spaces (struct ui_out *uiout, int numspaces);
252 static void uo_text (struct ui_out *uiout, const char *string);
253 static void uo_message (struct ui_out *uiout, int verbosity,
254 const char *format, va_list args)
255 ATTRIBUTE_PRINTF (3, 0);
256 static void uo_wrap_hint (struct ui_out *uiout, char *identstring);
257 static void uo_flush (struct ui_out *uiout);
258 static int uo_redirect (struct ui_out *uiout, struct ui_file *outstream);
259 static void uo_data_destroy (struct ui_out *uiout);
261 /* Prototypes for local functions */
263 extern void _initialize_ui_out (void);
264 static void append_header_to_list (struct ui_out *uiout, int width,
265 int alignment, const char *col_name,
267 static int get_next_header (struct ui_out *uiout, int *colno, int *width,
268 int *alignment, char **colhdr);
269 static void clear_header_list (struct ui_out *uiout);
270 static void clear_table (struct ui_out *uiout);
271 static void verify_field (struct ui_out *uiout, int *fldno, int *width,
274 /* exported functions (ui_out API) */
276 /* Mark beginning of a table. */
279 ui_out_table_begin (struct ui_out *uiout, int nbrofcols,
283 if (uiout->table.flag)
284 internal_error (__FILE__, __LINE__,
285 _("tables cannot be nested; table_begin found before \
286 previous table_end."));
288 uiout->table.flag = 1;
289 uiout->table.body_flag = 0;
290 uiout->table.entry_level = uiout->level + 1;
291 uiout->table.columns = nbrofcols;
293 uiout->table.id = xstrdup (tblid);
295 uiout->table.id = NULL;
296 clear_header_list (uiout);
298 uo_table_begin (uiout, nbrofcols, nr_rows, uiout->table.id);
302 ui_out_table_body (struct ui_out *uiout)
304 if (!uiout->table.flag)
305 internal_error (__FILE__, __LINE__,
306 _("table_body outside a table is not valid; it must be \
307 after a table_begin and before a table_end."));
308 if (uiout->table.body_flag)
309 internal_error (__FILE__, __LINE__,
310 _("extra table_body call not allowed; there must be \
311 only one table_body after a table_begin and before a table_end."));
312 if (uiout->table.header_next->colno != uiout->table.columns)
313 internal_error (__FILE__, __LINE__,
314 _("number of headers differ from number of table \
317 uiout->table.body_flag = 1;
318 uiout->table.header_next = uiout->table.header_first;
320 uo_table_body (uiout);
324 ui_out_table_end (struct ui_out *uiout)
326 if (!uiout->table.flag)
327 internal_error (__FILE__, __LINE__,
328 _("misplaced table_end or missing table_begin."));
330 uiout->table.entry_level = 0;
331 uiout->table.body_flag = 0;
332 uiout->table.flag = 0;
334 uo_table_end (uiout);
339 ui_out_table_header (struct ui_out *uiout, int width, enum ui_align alignment,
340 const char *col_name,
343 if (!uiout->table.flag || uiout->table.body_flag)
344 internal_error (__FILE__, __LINE__,
345 _("table header must be specified after table_begin \
346 and before table_body."));
348 append_header_to_list (uiout, width, alignment, col_name, colhdr);
350 uo_table_header (uiout, width, alignment, col_name, colhdr);
354 do_cleanup_table_end (void *data)
356 struct ui_out *ui_out = data;
358 ui_out_table_end (ui_out);
362 make_cleanup_ui_out_table_begin_end (struct ui_out *ui_out, int nr_cols,
363 int nr_rows, const char *tblid)
365 ui_out_table_begin (ui_out, nr_cols, nr_rows, tblid);
366 return make_cleanup (do_cleanup_table_end, ui_out);
370 ui_out_begin (struct ui_out *uiout,
371 enum ui_out_type type,
376 if (uiout->table.flag && !uiout->table.body_flag)
377 internal_error (__FILE__, __LINE__,
378 _("table header or table_body expected; lists must be \
379 specified after table_body."));
381 /* Be careful to verify the ``field'' before the new tuple/list is
382 pushed onto the stack. That way the containing list/table/row is
383 verified and not the newly created tuple/list. This verification
384 is needed (at least) for the case where a table row entry
385 contains either a tuple/list. For that case bookkeeping such as
386 updating the column count or advancing to the next heading still
387 needs to be performed. */
393 verify_field (uiout, &fldno, &width, &align);
396 new_level = push_level (uiout, type, id);
398 /* If the push puts us at the same level as a table row entry, we've
399 got a new table row. Put the header pointer back to the start. */
400 if (uiout->table.body_flag
401 && uiout->table.entry_level == new_level)
402 uiout->table.header_next = uiout->table.header_first;
404 uo_begin (uiout, type, new_level, id);
408 ui_out_end (struct ui_out *uiout,
409 enum ui_out_type type)
411 int old_level = pop_level (uiout, type);
413 uo_end (uiout, type, old_level);
416 struct ui_out_end_cleanup_data
418 struct ui_out *uiout;
419 enum ui_out_type type;
423 do_cleanup_end (void *data)
425 struct ui_out_end_cleanup_data *end_cleanup_data = data;
427 ui_out_end (end_cleanup_data->uiout, end_cleanup_data->type);
428 xfree (end_cleanup_data);
431 static struct cleanup *
432 make_cleanup_ui_out_end (struct ui_out *uiout,
433 enum ui_out_type type)
435 struct ui_out_end_cleanup_data *end_cleanup_data;
437 end_cleanup_data = XMALLOC (struct ui_out_end_cleanup_data);
438 end_cleanup_data->uiout = uiout;
439 end_cleanup_data->type = type;
440 return make_cleanup (do_cleanup_end, end_cleanup_data);
444 make_cleanup_ui_out_tuple_begin_end (struct ui_out *uiout,
447 ui_out_begin (uiout, ui_out_type_tuple, id);
448 return make_cleanup_ui_out_end (uiout, ui_out_type_tuple);
452 make_cleanup_ui_out_list_begin_end (struct ui_out *uiout,
455 ui_out_begin (uiout, ui_out_type_list, id);
456 return make_cleanup_ui_out_end (uiout, ui_out_type_list);
460 ui_out_field_int (struct ui_out *uiout,
468 verify_field (uiout, &fldno, &width, &align);
470 uo_field_int (uiout, fldno, width, align, fldname, value);
474 ui_out_field_fmt_int (struct ui_out *uiout,
476 enum ui_align input_align,
484 verify_field (uiout, &fldno, &width, &align);
486 uo_field_int (uiout, fldno, input_width, input_align, fldname, value);
489 /* Documented in ui-out.h. */
492 ui_out_field_core_addr (struct ui_out *uiout,
494 struct gdbarch *gdbarch,
497 ui_out_field_string (uiout, fldname,
498 print_core_address (gdbarch, address));
502 ui_out_field_stream (struct ui_out *uiout,
504 struct ui_file *stream)
507 char *buffer = ui_file_xstrdup (stream, &length);
508 struct cleanup *old_cleanup = make_cleanup (xfree, buffer);
511 ui_out_field_string (uiout, fldname, buffer);
513 ui_out_field_skip (uiout, fldname);
514 ui_file_rewind (stream);
515 do_cleanups (old_cleanup);
518 /* Used to omit a field. */
521 ui_out_field_skip (struct ui_out *uiout,
528 verify_field (uiout, &fldno, &width, &align);
530 uo_field_skip (uiout, fldno, width, align, fldname);
534 ui_out_field_string (struct ui_out *uiout,
542 verify_field (uiout, &fldno, &width, &align);
544 uo_field_string (uiout, fldno, width, align, fldname, string);
549 ui_out_field_fmt (struct ui_out *uiout,
551 const char *format, ...)
558 /* Will not align, but has to call anyway. */
559 verify_field (uiout, &fldno, &width, &align);
561 va_start (args, format);
563 uo_field_fmt (uiout, fldno, width, align, fldname, format, args);
569 ui_out_spaces (struct ui_out *uiout, int numspaces)
571 uo_spaces (uiout, numspaces);
575 ui_out_text (struct ui_out *uiout,
578 uo_text (uiout, string);
582 ui_out_message (struct ui_out *uiout, int verbosity,
583 const char *format,...)
587 va_start (args, format);
588 uo_message (uiout, verbosity, format, args);
593 ui_out_wrap_hint (struct ui_out *uiout, char *identstring)
595 uo_wrap_hint (uiout, identstring);
599 ui_out_flush (struct ui_out *uiout)
605 ui_out_redirect (struct ui_out *uiout, struct ui_file *outstream)
607 return uo_redirect (uiout, outstream);
610 /* Set the flags specified by the mask given. */
612 ui_out_set_flags (struct ui_out *uiout, int mask)
614 int oldflags = uiout->flags;
616 uiout->flags |= mask;
620 /* Clear the flags specified by the mask given. */
622 ui_out_clear_flags (struct ui_out *uiout, int mask)
624 int oldflags = uiout->flags;
626 uiout->flags &= ~mask;
630 /* Test the flags against the mask given. */
632 ui_out_test_flags (struct ui_out *uiout, int mask)
634 return (uiout->flags & mask);
637 /* Obtain the current verbosity level (as stablished by the
638 'set verbositylevel' command. */
641 ui_out_get_verblvl (struct ui_out *uiout)
643 /* FIXME: not implemented yet. */
648 ui_out_is_mi_like_p (struct ui_out *uiout)
650 return uiout->impl->is_mi_like_p;
653 /* Default gdb-out hook functions. */
656 default_table_begin (struct ui_out *uiout, int nbrofcols,
663 default_table_body (struct ui_out *uiout)
668 default_table_end (struct ui_out *uiout)
673 default_table_header (struct ui_out *uiout, int width, enum ui_align alignment,
674 const char *col_name,
680 default_begin (struct ui_out *uiout,
681 enum ui_out_type type,
688 default_end (struct ui_out *uiout,
689 enum ui_out_type type,
695 default_field_int (struct ui_out *uiout, int fldno, int width,
697 const char *fldname, int value)
702 default_field_skip (struct ui_out *uiout, int fldno, int width,
703 enum ui_align align, const char *fldname)
708 default_field_string (struct ui_out *uiout,
718 default_field_fmt (struct ui_out *uiout, int fldno, int width,
727 default_spaces (struct ui_out *uiout, int numspaces)
732 default_text (struct ui_out *uiout, const char *string)
737 default_message (struct ui_out *uiout, int verbosity,
744 default_wrap_hint (struct ui_out *uiout, char *identstring)
749 default_flush (struct ui_out *uiout)
754 default_data_destroy (struct ui_out *uiout)
758 /* Interface to the implementation functions. */
761 uo_table_begin (struct ui_out *uiout, int nbrofcols,
765 if (!uiout->impl->table_begin)
767 uiout->impl->table_begin (uiout, nbrofcols, nr_rows, tblid);
771 uo_table_body (struct ui_out *uiout)
773 if (!uiout->impl->table_body)
775 uiout->impl->table_body (uiout);
779 uo_table_end (struct ui_out *uiout)
781 if (!uiout->impl->table_end)
783 uiout->impl->table_end (uiout);
787 uo_table_header (struct ui_out *uiout, int width, enum ui_align align,
788 const char *col_name,
791 if (!uiout->impl->table_header)
793 uiout->impl->table_header (uiout, width, align, col_name, colhdr);
796 /* Clear the table associated with UIOUT. */
799 clear_table (struct ui_out *uiout)
802 xfree (uiout->table.id);
803 clear_header_list (uiout);
807 uo_begin (struct ui_out *uiout,
808 enum ui_out_type type,
812 if (uiout->impl->begin == NULL)
814 uiout->impl->begin (uiout, type, level, id);
818 uo_end (struct ui_out *uiout,
819 enum ui_out_type type,
822 if (uiout->impl->end == NULL)
824 uiout->impl->end (uiout, type, level);
828 uo_field_int (struct ui_out *uiout, int fldno, int width, enum ui_align align,
832 if (!uiout->impl->field_int)
834 uiout->impl->field_int (uiout, fldno, width, align, fldname, value);
838 uo_field_skip (struct ui_out *uiout, int fldno, int width, enum ui_align align,
841 if (!uiout->impl->field_skip)
843 uiout->impl->field_skip (uiout, fldno, width, align, fldname);
847 uo_field_string (struct ui_out *uiout, int fldno, int width,
852 if (!uiout->impl->field_string)
854 uiout->impl->field_string (uiout, fldno, width, align, fldname, string);
858 uo_field_fmt (struct ui_out *uiout, int fldno, int width, enum ui_align align,
863 if (!uiout->impl->field_fmt)
865 uiout->impl->field_fmt (uiout, fldno, width, align, fldname, format, args);
869 uo_spaces (struct ui_out *uiout, int numspaces)
871 if (!uiout->impl->spaces)
873 uiout->impl->spaces (uiout, numspaces);
877 uo_text (struct ui_out *uiout,
880 if (!uiout->impl->text)
882 uiout->impl->text (uiout, string);
886 uo_message (struct ui_out *uiout, int verbosity,
890 if (!uiout->impl->message)
892 uiout->impl->message (uiout, verbosity, format, args);
896 uo_wrap_hint (struct ui_out *uiout, char *identstring)
898 if (!uiout->impl->wrap_hint)
900 uiout->impl->wrap_hint (uiout, identstring);
904 uo_flush (struct ui_out *uiout)
906 if (!uiout->impl->flush)
908 uiout->impl->flush (uiout);
912 uo_redirect (struct ui_out *uiout, struct ui_file *outstream)
914 if (!uiout->impl->redirect)
916 uiout->impl->redirect (uiout, outstream);
921 uo_data_destroy (struct ui_out *uiout)
923 if (!uiout->impl->data_destroy)
926 uiout->impl->data_destroy (uiout);
929 /* local functions */
931 /* List of column headers manipulation routines. */
934 clear_header_list (struct ui_out *uiout)
936 while (uiout->table.header_first != NULL)
938 uiout->table.header_next = uiout->table.header_first;
939 uiout->table.header_first = uiout->table.header_first->next;
940 xfree (uiout->table.header_next->colhdr);
941 xfree (uiout->table.header_next->col_name);
942 xfree (uiout->table.header_next);
944 gdb_assert (uiout->table.header_first == NULL);
945 uiout->table.header_last = NULL;
946 uiout->table.header_next = NULL;
950 append_header_to_list (struct ui_out *uiout,
953 const char *col_name,
956 struct ui_out_hdr *temphdr;
958 temphdr = XMALLOC (struct ui_out_hdr);
959 temphdr->width = width;
960 temphdr->alignment = alignment;
961 /* We have to copy the column title as the original may be an
964 temphdr->colhdr = xstrdup (colhdr);
966 temphdr->colhdr = NULL;
968 if (col_name != NULL)
969 temphdr->col_name = xstrdup (col_name);
970 else if (colhdr != NULL)
971 temphdr->col_name = xstrdup (colhdr);
973 temphdr->col_name = NULL;
975 temphdr->next = NULL;
976 if (uiout->table.header_first == NULL)
979 uiout->table.header_first = temphdr;
980 uiout->table.header_last = temphdr;
984 temphdr->colno = uiout->table.header_last->colno + 1;
985 uiout->table.header_last->next = temphdr;
986 uiout->table.header_last = temphdr;
988 uiout->table.header_next = uiout->table.header_last;
991 /* Extract the format information for the NEXT header and advance
992 the header pointer. Return 0 if there was no next header. */
995 get_next_header (struct ui_out *uiout,
1001 /* There may be no headers at all or we may have used all columns. */
1002 if (uiout->table.header_next == NULL)
1004 *colno = uiout->table.header_next->colno;
1005 *width = uiout->table.header_next->width;
1006 *alignment = uiout->table.header_next->alignment;
1007 *colhdr = uiout->table.header_next->colhdr;
1008 /* Advance the header pointer to the next entry. */
1009 uiout->table.header_next = uiout->table.header_next->next;
1014 /* Verify that the field/tuple/list is correctly positioned. Return
1015 the field number and corresponding alignment (if
1016 available/applicable). */
1019 verify_field (struct ui_out *uiout, int *fldno, int *width, int *align)
1021 struct ui_out_level *current = current_level (uiout);
1024 if (uiout->table.flag)
1026 if (!uiout->table.body_flag)
1027 internal_error (__FILE__, __LINE__,
1028 _("table_body missing; table fields must be \
1029 specified after table_body and inside a list."));
1030 /* NOTE: cagney/2001-12-08: There was a check here to ensure
1031 that this code was only executed when uiout->level was
1032 greater than zero. That no longer applies - this code is run
1033 before each table row tuple is started and at that point the
1037 current->field_count += 1;
1039 if (uiout->table.body_flag
1040 && uiout->table.entry_level == uiout->level
1041 && get_next_header (uiout, fldno, width, align, &text))
1043 if (*fldno != current->field_count)
1044 internal_error (__FILE__, __LINE__,
1045 _("ui-out internal error in handling headers."));
1050 *align = ui_noalign;
1051 *fldno = current->field_count;
1056 /* Access to ui-out members data. */
1059 ui_out_data (struct ui_out *uiout)
1064 /* Access table field parameters. */
1066 ui_out_query_field (struct ui_out *uiout, int colno,
1067 int *width, int *alignment, char **col_name)
1069 struct ui_out_hdr *hdr;
1071 if (!uiout->table.flag)
1074 for (hdr = uiout->table.header_first; hdr; hdr = hdr->next)
1075 if (hdr->colno == colno)
1077 *width = hdr->width;
1078 *alignment = hdr->alignment;
1079 *col_name = hdr->col_name;
1086 /* Initalize private members at startup. */
1089 ui_out_new (struct ui_out_impl *impl, void *data,
1092 struct ui_out *uiout = XMALLOC (struct ui_out);
1096 uiout->flags = flags;
1097 uiout->table.flag = 0;
1098 uiout->table.body_flag = 0;
1100 memset (uiout->levels, 0, sizeof (uiout->levels));
1101 uiout->table.header_first = NULL;
1102 uiout->table.header_last = NULL;
1103 uiout->table.header_next = NULL;
1107 /* Free UIOUT and the memory areas it references. */
1110 ui_out_destroy (struct ui_out *uiout)
1112 uo_data_destroy (uiout);
1113 clear_table (uiout);
1117 /* Standard gdb initialization hook. */
1120 _initialize_ui_out (void)
1122 /* nothing needs to be done */