gdb/ui-out.c

   1 /* Output generating routines for GDB.
   2
   3    Copyright (C) 1999-2016 Free Software Foundation, Inc.
   4
   5    Contributed by Cygnus Solutions.
   6    Written by Fernando Nasser for Cygnus.
   7
   8    This file is part of GDB.
   9
  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.
  14
  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.
  19
  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/>.  */
  22
  23 #include "defs.h"
  24 #include "expression.h"         /* For language.h */
  25 #include "language.h"
  26 #include "ui-out.h"
  27
  28 /* table header structures */
  29
  30 struct ui_out_hdr
  31   {
  32     int colno;
  33     int width;
  34     enum ui_align alignment;
  35     char *col_name;
  36     char *colhdr;
  37     struct ui_out_hdr *next;
  38   };
  39
  40 struct ui_out_level
  41   {
  42     /* Count each field; the first element is for non-list fields.  */
  43     int field_count;
  44     /* The type of this level.  */
  45     enum ui_out_type type;
  46   };
  47
  48 /* Define uiout->level vector types and operations.  */
  49 typedef struct ui_out_level *ui_out_level_p;
  50 DEF_VEC_P (ui_out_level_p);
  51
  52 /* Tables are special.  Maintain a separate structure that tracks
  53    their state.  At present an output can only contain a single table
  54    but that restriction might eventually be lifted.  */
  55
  56 struct ui_out_table
  57 {
  58   /* If on, a table is being generated.  */
  59   int flag;
  60
  61   /* If on, the body of a table is being generated.  If off, the table
  62      header is being generated.  */
  63   int body_flag;
  64
  65   /* The level at which each entry of the table is to be found.  A row
  66      (a tuple) is made up of entries.  Consequently ENTRY_LEVEL is one
  67      above that of the table.  */
  68   int entry_level;
  69
  70   /* Number of table columns (as specified in the table_begin call).  */
  71   int columns;
  72
  73   /* String identifying the table (as specified in the table_begin
  74      call).  */
  75   char *id;
  76
  77   /* Points to the first table header (if any).  */
  78   struct ui_out_hdr *header_first;
  79
  80   /* Points to the last table header (if any).  */
  81   struct ui_out_hdr *header_last;
  82
  83   /* Points to header of NEXT column to format.  */
  84   struct ui_out_hdr *header_next;
  85
  86 };
  87
  88
  89 /* The ui_out structure */
  90 /* Any change here requires a corresponding one in the initialization
  91    of the default uiout, which is statically initialized.  */
  92
  93 struct ui_out
  94   {
  95     int flags;
  96     /* Specific implementation of ui-out.  */
  97     const struct ui_out_impl *impl;
  98     void *data;
  99
 100     /* Current level.  */
 101     int level;
 102
 103     /* Vector to store and track the ui-out levels.  */
 104     VEC (ui_out_level_p) *levels;
 105
 106     /* A table, if any.  At present only a single table is supported.  */
 107     struct ui_out_table table;
 108   };
 109
 110 /* The current (inner most) level.  */
 111 static struct ui_out_level *
 112 current_level (struct ui_out *uiout)
 113 {
 114   return VEC_index (ui_out_level_p, uiout->levels, uiout->level);
 115 }
 116
 117 /* Create a new level, of TYPE.  Return the new level's index.  */
 118 static int
 119 push_level (struct ui_out *uiout,
 120             enum ui_out_type type,
 121             const char *id)
 122 {
 123   struct ui_out_level *current;
 124
 125   uiout->level++;
 126   current = XNEW (struct ui_out_level);
 127   current->field_count = 0;
 128   current->type = type;
 129   VEC_safe_push (ui_out_level_p, uiout->levels, current);
 130   return uiout->level;
 131 }
 132
 133 /* Discard the current level, return the discarded level's index.
 134    TYPE is the type of the level being discarded.  */
 135 static int
 136 pop_level (struct ui_out *uiout,
 137            enum ui_out_type type)
 138 {
 139   struct ui_out_level *current;
 140
 141   /* We had better not underflow the buffer.  */
 142   gdb_assert (uiout->level > 0);
 143   gdb_assert (current_level (uiout)->type == type);
 144   current = VEC_pop (ui_out_level_p, uiout->levels);
 145   xfree (current);
 146   uiout->level--;
 147   return uiout->level + 1;
 148 }
 149
 150
 151 /* These are the default implementation functions.  */
 152
 153 static void default_table_begin (struct ui_out *uiout, int nbrofcols,
 154                                  int nr_rows, const char *tblid);
 155 static void default_table_body (struct ui_out *uiout);
 156 static void default_table_end (struct ui_out *uiout);
 157 static void default_table_header (struct ui_out *uiout, int width,
 158                                   enum ui_align alig, const char *col_name,
 159                                   const char *colhdr);
 160 static void default_begin (struct ui_out *uiout,
 161                            enum ui_out_type type,
 162                            int level, const char *id);
 163 static void default_end (struct ui_out *uiout,
 164                          enum ui_out_type type,
 165                          int level);
 166 static void default_field_int (struct ui_out *uiout, int fldno, int width,
 167                                enum ui_align alig,
 168                                const char *fldname,
 169                                int value);
 170 static void default_field_skip (struct ui_out *uiout, int fldno, int width,
 171                                 enum ui_align alig,
 172                                 const char *fldname);
 173 static void default_field_string (struct ui_out *uiout, int fldno, int width,
 174                                   enum ui_align align,
 175                                   const char *fldname,
 176                                   const char *string);
 177 static void default_field_fmt (struct ui_out *uiout, int fldno,
 178                                int width, enum ui_align align,
 179                                const char *fldname,
 180                                const char *format,
 181                                va_list args) ATTRIBUTE_PRINTF (6, 0);
 182 static void default_spaces (struct ui_out *uiout, int numspaces);
 183 static void default_text (struct ui_out *uiout, const char *string);
 184 static void default_message (struct ui_out *uiout, int verbosity,
 185                              const char *format,
 186                              va_list args) ATTRIBUTE_PRINTF (3, 0);
 187 static void default_wrap_hint (struct ui_out *uiout, char *identstring);
 188 static void default_flush (struct ui_out *uiout);
 189 static void default_data_destroy (struct ui_out *uiout);
 190
 191 /* This is the default ui-out implementation functions vector.  */
 192
 193 const struct ui_out_impl default_ui_out_impl =
 194 {
 195   default_table_begin,
 196   default_table_body,
 197   default_table_end,
 198   default_table_header,
 199   default_begin,
 200   default_end,
 201   default_field_int,
 202   default_field_skip,
 203   default_field_string,
 204   default_field_fmt,
 205   default_spaces,
 206   default_text,
 207   default_message,
 208   default_wrap_hint,
 209   default_flush,
 210   NULL, /* redirect */
 211   default_data_destroy,
 212   0, /* Does not need MI hacks.  */
 213 };
 214
 215 /* The default ui_out */
 216
 217 struct ui_out def_uiout =
 218 {
 219   0,                            /* flags */
 220   &default_ui_out_impl,         /* impl */
 221 };
 222
 223 /* Pointer to current ui_out */
 224 /* FIXME: This should not be a global, but something passed down from main.c
 225    or top.c.  */
 226
 227 struct ui_out *current_uiout = &def_uiout;
 228
 229 /* These are the interfaces to implementation functions.  */
 230
 231 static void uo_table_begin (struct ui_out *uiout, int nbrofcols,
 232                             int nr_rows, const char *tblid);
 233 static void uo_table_body (struct ui_out *uiout);
 234 static void uo_table_end (struct ui_out *uiout);
 235 static void uo_table_header (struct ui_out *uiout, int width,
 236                              enum ui_align align, const char *col_name,
 237                              const char *colhdr);
 238 static void uo_begin (struct ui_out *uiout,
 239                       enum ui_out_type type,
 240                       int level, const char *id);
 241 static void uo_end (struct ui_out *uiout,
 242                     enum ui_out_type type,
 243                     int level);
 244 static void uo_field_int (struct ui_out *uiout, int fldno, int width,
 245                           enum ui_align align, const char *fldname, int value);
 246 static void uo_field_skip (struct ui_out *uiout, int fldno, int width,
 247                            enum ui_align align, const char *fldname);
 248 static void uo_field_fmt (struct ui_out *uiout, int fldno, int width,
 249                           enum ui_align align, const char *fldname,
 250                           const char *format, va_list args)
 251      ATTRIBUTE_PRINTF (6, 0);
 252 static void uo_spaces (struct ui_out *uiout, int numspaces);
 253 static void uo_text (struct ui_out *uiout, const char *string);
 254 static void uo_message (struct ui_out *uiout, int verbosity,
 255                         const char *format, va_list args)
 256      ATTRIBUTE_PRINTF (3, 0);
 257 static void uo_wrap_hint (struct ui_out *uiout, char *identstring);
 258 static void uo_flush (struct ui_out *uiout);
 259 static int uo_redirect (struct ui_out *uiout, struct ui_file *outstream);
 260 static void uo_data_destroy (struct ui_out *uiout);
 261
 262 /* Prototypes for local functions */
 263
 264 extern void _initialize_ui_out (void);
 265 static void append_header_to_list (struct ui_out *uiout, int width,
 266                                    enum ui_align alignment, const char *col_name,
 267                                    const char *colhdr);
 268 static int get_next_header (struct ui_out *uiout, int *colno, int *width,
 269                             enum ui_align *alignment, char **colhdr);
 270 static void clear_header_list (struct ui_out *uiout);
 271 static void clear_table (struct ui_out *uiout);
 272 static void verify_field (struct ui_out *uiout, int *fldno, int *width,
 273                           enum ui_align *align);
 274
 275 /* exported functions (ui_out API) */
 276
 277 /* Mark beginning of a table.  */
 278
 279 static void
 280 ui_out_table_begin (struct ui_out *uiout, int nbrofcols,
 281                     int nr_rows,
 282                     const char *tblid)
 283 {
 284   if (uiout->table.flag)
 285     internal_error (__FILE__, __LINE__,
 286                     _("tables cannot be nested; table_begin found before \
 287 previous table_end."));
 288
 289   uiout->table.flag = 1;
 290   uiout->table.body_flag = 0;
 291   uiout->table.entry_level = uiout->level + 1;
 292   uiout->table.columns = nbrofcols;
 293   if (tblid != NULL)
 294     uiout->table.id = xstrdup (tblid);
 295   else
 296     uiout->table.id = NULL;
 297   clear_header_list (uiout);
 298
 299   uo_table_begin (uiout, nbrofcols, nr_rows, uiout->table.id);
 300 }
 301
 302 void
 303 ui_out_table_body (struct ui_out *uiout)
 304 {
 305   if (!uiout->table.flag)
 306     internal_error (__FILE__, __LINE__,
 307                     _("table_body outside a table is not valid; it must be \
 308 after a table_begin and before a table_end."));
 309   if (uiout->table.body_flag)
 310     internal_error (__FILE__, __LINE__,
 311                     _("extra table_body call not allowed; there must be \
 312 only one table_body after a table_begin and before a table_end."));
 313   if (uiout->table.header_next->colno != uiout->table.columns)
 314     internal_error (__FILE__, __LINE__,
 315                     _("number of headers differ from number of table \
 316 columns."));
 317
 318   uiout->table.body_flag = 1;
 319   uiout->table.header_next = uiout->table.header_first;
 320
 321   uo_table_body (uiout);
 322 }
 323
 324 static void
 325 ui_out_table_end (struct ui_out *uiout)
 326 {
 327   if (!uiout->table.flag)
 328     internal_error (__FILE__, __LINE__,
 329                     _("misplaced table_end or missing table_begin."));
 330
 331   uiout->table.entry_level = 0;
 332   uiout->table.body_flag = 0;
 333   uiout->table.flag = 0;
 334
 335   uo_table_end (uiout);
 336   clear_table (uiout);
 337 }
 338
 339 void
 340 ui_out_table_header (struct ui_out *uiout, int width, enum ui_align alignment,
 341                      const char *col_name,
 342                      const char *colhdr)
 343 {
 344   if (!uiout->table.flag || uiout->table.body_flag)
 345     internal_error (__FILE__, __LINE__,
 346                     _("table header must be specified after table_begin \
 347 and before table_body."));
 348
 349   append_header_to_list (uiout, width, alignment, col_name, colhdr);
 350
 351   uo_table_header (uiout, width, alignment, col_name, colhdr);
 352 }
 353
 354 static void
 355 do_cleanup_table_end (void *data)
 356 {
 357   struct ui_out *ui_out = (struct ui_out *) data;
 358
 359   ui_out_table_end (ui_out);
 360 }
 361
 362 struct cleanup *
 363 make_cleanup_ui_out_table_begin_end (struct ui_out *ui_out, int nr_cols,
 364                                      int nr_rows, const char *tblid)
 365 {
 366   ui_out_table_begin (ui_out, nr_cols, nr_rows, tblid);
 367   return make_cleanup (do_cleanup_table_end, ui_out);
 368 }
 369
 370 void
 371 ui_out_begin (struct ui_out *uiout,
 372               enum ui_out_type type,
 373               const char *id)
 374 {
 375   int new_level;
 376
 377   if (uiout->table.flag && !uiout->table.body_flag)
 378     internal_error (__FILE__, __LINE__,
 379                     _("table header or table_body expected; lists must be \
 380 specified after table_body."));
 381
 382   /* Be careful to verify the ``field'' before the new tuple/list is
 383      pushed onto the stack.  That way the containing list/table/row is
 384      verified and not the newly created tuple/list.  This verification
 385      is needed (at least) for the case where a table row entry
 386      contains either a tuple/list.  For that case bookkeeping such as
 387      updating the column count or advancing to the next heading still
 388      needs to be performed.  */
 389   {
 390     int fldno;
 391     int width;
 392     enum ui_align align;
 393
 394     verify_field (uiout, &fldno, &width, &align);
 395   }
 396
 397   new_level = push_level (uiout, type, id);
 398
 399   /* If the push puts us at the same level as a table row entry, we've
 400      got a new table row.  Put the header pointer back to the start.  */
 401   if (uiout->table.body_flag
 402       && uiout->table.entry_level == new_level)
 403     uiout->table.header_next = uiout->table.header_first;
 404
 405   uo_begin (uiout, type, new_level, id);
 406 }
 407
 408 void
 409 ui_out_end (struct ui_out *uiout,
 410             enum ui_out_type type)
 411 {
 412   int old_level = pop_level (uiout, type);
 413
 414   uo_end (uiout, type, old_level);
 415 }
 416
 417 struct ui_out_end_cleanup_data
 418 {
 419   struct ui_out *uiout;
 420   enum ui_out_type type;
 421 };
 422
 423 static void
 424 do_cleanup_end (void *data)
 425 {
 426   struct ui_out_end_cleanup_data *end_cleanup_data
 427     = (struct ui_out_end_cleanup_data *) data;
 428
 429   ui_out_end (end_cleanup_data->uiout, end_cleanup_data->type);
 430   xfree (end_cleanup_data);
 431 }
 432
 433 static struct cleanup *
 434 make_cleanup_ui_out_end (struct ui_out *uiout,
 435                          enum ui_out_type type)
 436 {
 437   struct ui_out_end_cleanup_data *end_cleanup_data;
 438
 439   end_cleanup_data = XNEW (struct ui_out_end_cleanup_data);
 440   end_cleanup_data->uiout = uiout;
 441   end_cleanup_data->type = type;
 442   return make_cleanup (do_cleanup_end, end_cleanup_data);
 443 }
 444
 445 struct cleanup *
 446 make_cleanup_ui_out_tuple_begin_end (struct ui_out *uiout,
 447                                      const char *id)
 448 {
 449   ui_out_begin (uiout, ui_out_type_tuple, id);
 450   return make_cleanup_ui_out_end (uiout, ui_out_type_tuple);
 451 }
 452
 453 struct cleanup *
 454 make_cleanup_ui_out_list_begin_end (struct ui_out *uiout,
 455                                     const char *id)
 456 {
 457   ui_out_begin (uiout, ui_out_type_list, id);
 458   return make_cleanup_ui_out_end (uiout, ui_out_type_list);
 459 }
 460
 461 void
 462 ui_out_field_int (struct ui_out *uiout,
 463                   const char *fldname,
 464                   int value)
 465 {
 466   int fldno;
 467   int width;
 468   enum ui_align align;
 469
 470   verify_field (uiout, &fldno, &width, &align);
 471
 472   uo_field_int (uiout, fldno, width, align, fldname, value);
 473 }
 474
 475 void
 476 ui_out_field_fmt_int (struct ui_out *uiout,
 477                       int input_width,
 478                       enum ui_align input_align,
 479                       const char *fldname,
 480                       int value)
 481 {
 482   int fldno;
 483   int width;
 484   enum ui_align align;
 485
 486   verify_field (uiout, &fldno, &width, &align);
 487
 488   uo_field_int (uiout, fldno, input_width, input_align, fldname, value);
 489 }
 490
 491 /* Documented in ui-out.h.  */
 492
 493 void
 494 ui_out_field_core_addr (struct ui_out *uiout,
 495                         const char *fldname,
 496                         struct gdbarch *gdbarch,
 497                         CORE_ADDR address)
 498 {
 499   ui_out_field_string (uiout, fldname,
 500                        print_core_address (gdbarch, address));
 501 }
 502
 503 void
 504 ui_out_field_stream (struct ui_out *uiout,
 505                      const char *fldname,
 506                      struct ui_file *stream)
 507 {
 508   long length;
 509   char *buffer = ui_file_xstrdup (stream, &length);
 510   struct cleanup *old_cleanup = make_cleanup (xfree, buffer);
 511
 512   if (length > 0)
 513     ui_out_field_string (uiout, fldname, buffer);
 514   else
 515     ui_out_field_skip (uiout, fldname);
 516   ui_file_rewind (stream);
 517   do_cleanups (old_cleanup);
 518 }
 519
 520 /* Used to omit a field.  */
 521
 522 void
 523 ui_out_field_skip (struct ui_out *uiout,
 524                    const char *fldname)
 525 {
 526   int fldno;
 527   int width;
 528   enum ui_align align;
 529
 530   verify_field (uiout, &fldno, &width, &align);
 531
 532   uo_field_skip (uiout, fldno, width, align, fldname);
 533 }
 534
 535 void
 536 ui_out_field_string (struct ui_out *uiout,
 537                      const char *fldname,
 538                      const char *string)
 539 {
 540   int fldno;
 541   int width;
 542   enum ui_align align;
 543
 544   verify_field (uiout, &fldno, &width, &align);
 545
 546   uo_field_string (uiout, fldno, width, align, fldname, string);
 547 }
 548
 549 /* VARARGS */
 550 void
 551 ui_out_field_fmt (struct ui_out *uiout,
 552                   const char *fldname,
 553                   const char *format, ...)
 554 {
 555   va_list args;
 556   int fldno;
 557   int width;
 558   enum ui_align align;
 559
 560   /* Will not align, but has to call anyway.  */
 561   verify_field (uiout, &fldno, &width, &align);
 562
 563   va_start (args, format);
 564
 565   uo_field_fmt (uiout, fldno, width, align, fldname, format, args);
 566
 567   va_end (args);
 568 }
 569
 570 void
 571 ui_out_spaces (struct ui_out *uiout, int numspaces)
 572 {
 573   uo_spaces (uiout, numspaces);
 574 }
 575
 576 void
 577 ui_out_text (struct ui_out *uiout,
 578              const char *string)
 579 {
 580   uo_text (uiout, string);
 581 }
 582
 583 void
 584 ui_out_message (struct ui_out *uiout, int verbosity,
 585                 const char *format,...)
 586 {
 587   va_list args;
 588
 589   va_start (args, format);
 590   uo_message (uiout, verbosity, format, args);
 591   va_end (args);
 592 }
 593
 594 void
 595 ui_out_wrap_hint (struct ui_out *uiout, char *identstring)
 596 {
 597   uo_wrap_hint (uiout, identstring);
 598 }
 599
 600 void
 601 ui_out_flush (struct ui_out *uiout)
 602 {
 603   uo_flush (uiout);
 604 }
 605
 606 int
 607 ui_out_redirect (struct ui_out *uiout, struct ui_file *outstream)
 608 {
 609   return uo_redirect (uiout, outstream);
 610 }
 611
 612 /* Set the flags specified by the mask given.  */
 613 int
 614 ui_out_set_flags (struct ui_out *uiout, int mask)
 615 {
 616   int oldflags = uiout->flags;
 617
 618   uiout->flags |= mask;
 619   return oldflags;
 620 }
 621
 622 /* Clear the flags specified by the mask given.  */
 623 int
 624 ui_out_clear_flags (struct ui_out *uiout, int mask)
 625 {
 626   int oldflags = uiout->flags;
 627
 628   uiout->flags &= ~mask;
 629   return oldflags;
 630 }
 631
 632 /* Test the flags against the mask given.  */
 633 int
 634 ui_out_test_flags (struct ui_out *uiout, int mask)
 635 {
 636   return (uiout->flags & mask);
 637 }
 638
 639 /* Obtain the current verbosity level (as stablished by the
 640    'set verbositylevel' command.  */
 641
 642 int
 643 ui_out_get_verblvl (struct ui_out *uiout)
 644 {
 645   /* FIXME: not implemented yet.  */
 646   return 0;
 647 }
 648
 649 int
 650 ui_out_is_mi_like_p (struct ui_out *uiout)
 651 {
 652   return uiout->impl->is_mi_like_p;
 653 }
 654
 655 /* Default gdb-out hook functions.  */
 656
 657 static void
 658 default_table_begin (struct ui_out *uiout, int nbrofcols,
 659                      int nr_rows,
 660                      const char *tblid)
 661 {
 662 }
 663
 664 static void
 665 default_table_body (struct ui_out *uiout)
 666 {
 667 }
 668
 669 static void
 670 default_table_end (struct ui_out *uiout)
 671 {
 672 }
 673
 674 static void
 675 default_table_header (struct ui_out *uiout, int width, enum ui_align alignment,
 676                       const char *col_name,
 677                       const char *colhdr)
 678 {
 679 }
 680
 681 static void
 682 default_begin (struct ui_out *uiout,
 683                enum ui_out_type type,
 684                int level,
 685                const char *id)
 686 {
 687 }
 688
 689 static void
 690 default_end (struct ui_out *uiout,
 691              enum ui_out_type type,
 692              int level)
 693 {
 694 }
 695
 696 static void
 697 default_field_int (struct ui_out *uiout, int fldno, int width,
 698                    enum ui_align align,
 699                    const char *fldname, int value)
 700 {
 701 }
 702
 703 static void
 704 default_field_skip (struct ui_out *uiout, int fldno, int width,
 705                     enum ui_align align, const char *fldname)
 706 {
 707 }
 708
 709 static void
 710 default_field_string (struct ui_out *uiout,
 711                       int fldno,
 712                       int width,
 713                       enum ui_align align,
 714                       const char *fldname,
 715                       const char *string)
 716 {
 717 }
 718
 719 static void
 720 default_field_fmt (struct ui_out *uiout, int fldno, int width,
 721                    enum ui_align align,
 722                    const char *fldname,
 723                    const char *format,
 724                    va_list args)
 725 {
 726 }
 727
 728 static void
 729 default_spaces (struct ui_out *uiout, int numspaces)
 730 {
 731 }
 732
 733 static void
 734 default_text (struct ui_out *uiout, const char *string)
 735 {
 736 }
 737
 738 static void
 739 default_message (struct ui_out *uiout, int verbosity,
 740                  const char *format,
 741                  va_list args)
 742 {
 743 }
 744
 745 static void
 746 default_wrap_hint (struct ui_out *uiout, char *identstring)
 747 {
 748 }
 749
 750 static void
 751 default_flush (struct ui_out *uiout)
 752 {
 753 }
 754
 755 static void
 756 default_data_destroy (struct ui_out *uiout)
 757 {
 758 }
 759
 760 /* Interface to the implementation functions.  */
 761
 762 void
 763 uo_table_begin (struct ui_out *uiout, int nbrofcols,
 764                 int nr_rows,
 765                 const char *tblid)
 766 {
 767   if (!uiout->impl->table_begin)
 768     return;
 769   uiout->impl->table_begin (uiout, nbrofcols, nr_rows, tblid);
 770 }
 771
 772 void
 773 uo_table_body (struct ui_out *uiout)
 774 {
 775   if (!uiout->impl->table_body)
 776     return;
 777   uiout->impl->table_body (uiout);
 778 }
 779
 780 void
 781 uo_table_end (struct ui_out *uiout)
 782 {
 783   if (!uiout->impl->table_end)
 784     return;
 785   uiout->impl->table_end (uiout);
 786 }
 787
 788 void
 789 uo_table_header (struct ui_out *uiout, int width, enum ui_align align,
 790                  const char *col_name,
 791                  const char *colhdr)
 792 {
 793   if (!uiout->impl->table_header)
 794     return;
 795   uiout->impl->table_header (uiout, width, align, col_name, colhdr);
 796 }
 797
 798 /* Clear the table associated with UIOUT.  */
 799
 800 static void
 801 clear_table (struct ui_out *uiout)
 802 {
 803   xfree (uiout->table.id);
 804   uiout->table.id = NULL;
 805   clear_header_list (uiout);
 806 }
 807
 808 void
 809 uo_begin (struct ui_out *uiout,
 810           enum ui_out_type type,
 811           int level,
 812           const char *id)
 813 {
 814   if (uiout->impl->begin == NULL)
 815     return;
 816   uiout->impl->begin (uiout, type, level, id);
 817 }
 818
 819 void
 820 uo_end (struct ui_out *uiout,
 821         enum ui_out_type type,
 822         int level)
 823 {
 824   if (uiout->impl->end == NULL)
 825     return;
 826   uiout->impl->end (uiout, type, level);
 827 }
 828
 829 void
 830 uo_field_int (struct ui_out *uiout, int fldno, int width, enum ui_align align,
 831               const char *fldname,
 832               int value)
 833 {
 834   if (!uiout->impl->field_int)
 835     return;
 836   uiout->impl->field_int (uiout, fldno, width, align, fldname, value);
 837 }
 838
 839 void
 840 uo_field_skip (struct ui_out *uiout, int fldno, int width, enum ui_align align,
 841                const char *fldname)
 842 {
 843   if (!uiout->impl->field_skip)
 844     return;
 845   uiout->impl->field_skip (uiout, fldno, width, align, fldname);
 846 }
 847
 848 void
 849 uo_field_string (struct ui_out *uiout, int fldno, int width,
 850                  enum ui_align align,
 851                  const char *fldname,
 852                  const char *string)
 853 {
 854   if (!uiout->impl->field_string)
 855     return;
 856   uiout->impl->field_string (uiout, fldno, width, align, fldname, string);
 857 }
 858
 859 void
 860 uo_field_fmt (struct ui_out *uiout, int fldno, int width, enum ui_align align,
 861               const char *fldname,
 862               const char *format,
 863               va_list args)
 864 {
 865   if (!uiout->impl->field_fmt)
 866     return;
 867   uiout->impl->field_fmt (uiout, fldno, width, align, fldname, format, args);
 868 }
 869
 870 void
 871 uo_spaces (struct ui_out *uiout, int numspaces)
 872 {
 873   if (!uiout->impl->spaces)
 874     return;
 875   uiout->impl->spaces (uiout, numspaces);
 876 }
 877
 878 void
 879 uo_text (struct ui_out *uiout,
 880          const char *string)
 881 {
 882   if (!uiout->impl->text)
 883     return;
 884   uiout->impl->text (uiout, string);
 885 }
 886
 887 void
 888 uo_message (struct ui_out *uiout, int verbosity,
 889             const char *format,
 890             va_list args)
 891 {
 892   if (!uiout->impl->message)
 893     return;
 894   uiout->impl->message (uiout, verbosity, format, args);
 895 }
 896
 897 void
 898 uo_wrap_hint (struct ui_out *uiout, char *identstring)
 899 {
 900   if (!uiout->impl->wrap_hint)
 901     return;
 902   uiout->impl->wrap_hint (uiout, identstring);
 903 }
 904
 905 void
 906 uo_flush (struct ui_out *uiout)
 907 {
 908   if (!uiout->impl->flush)
 909     return;
 910   uiout->impl->flush (uiout);
 911 }
 912
 913 int
 914 uo_redirect (struct ui_out *uiout, struct ui_file *outstream)
 915 {
 916   if (!uiout->impl->redirect)
 917     return -1;
 918   uiout->impl->redirect (uiout, outstream);
 919   return 0;
 920 }
 921
 922 void
 923 uo_data_destroy (struct ui_out *uiout)
 924 {
 925   if (!uiout->impl->data_destroy)
 926     return;
 927
 928   uiout->impl->data_destroy (uiout);
 929 }
 930
 931 /* local functions */
 932
 933 /* List of column headers manipulation routines.  */
 934
 935 static void
 936 clear_header_list (struct ui_out *uiout)
 937 {
 938   while (uiout->table.header_first != NULL)
 939     {
 940       uiout->table.header_next = uiout->table.header_first;
 941       uiout->table.header_first = uiout->table.header_first->next;
 942       xfree (uiout->table.header_next->colhdr);
 943       xfree (uiout->table.header_next->col_name);
 944       xfree (uiout->table.header_next);
 945     }
 946   gdb_assert (uiout->table.header_first == NULL);
 947   uiout->table.header_last = NULL;
 948   uiout->table.header_next = NULL;
 949 }
 950
 951 static void
 952 append_header_to_list (struct ui_out *uiout,
 953                        int width,
 954                        enum ui_align alignment,
 955                        const char *col_name,
 956                        const char *colhdr)
 957 {
 958   struct ui_out_hdr *temphdr;
 959
 960   temphdr = XNEW (struct ui_out_hdr);
 961   temphdr->width = width;
 962   temphdr->alignment = alignment;
 963   /* We have to copy the column title as the original may be an
 964      automatic.  */
 965   if (colhdr != NULL)
 966     temphdr->colhdr = xstrdup (colhdr);
 967   else
 968     temphdr->colhdr = NULL;
 969
 970   if (col_name != NULL)
 971     temphdr->col_name = xstrdup (col_name);
 972   else if (colhdr != NULL)
 973     temphdr->col_name = xstrdup (colhdr);
 974   else
 975     temphdr->col_name = NULL;
 976
 977   temphdr->next = NULL;
 978   if (uiout->table.header_first == NULL)
 979     {
 980       temphdr->colno = 1;
 981       uiout->table.header_first = temphdr;
 982       uiout->table.header_last = temphdr;
 983     }
 984   else
 985     {
 986       temphdr->colno = uiout->table.header_last->colno + 1;
 987       uiout->table.header_last->next = temphdr;
 988       uiout->table.header_last = temphdr;
 989     }
 990   uiout->table.header_next = uiout->table.header_last;
 991 }
 992
 993 /* Extract the format information for the NEXT header and advance
 994    the header pointer.  Return 0 if there was no next header.  */
 995
 996 static int
 997 get_next_header (struct ui_out *uiout,
 998                  int *colno,
 999                  int *width,
1000                  enum ui_align *alignment,
1001                  char **colhdr)
1002 {
1003   /* There may be no headers at all or we may have used all columns.  */
1004   if (uiout->table.header_next == NULL)
1005     return 0;
1006   *colno = uiout->table.header_next->colno;
1007   *width = uiout->table.header_next->width;
1008   *alignment = uiout->table.header_next->alignment;
1009   *colhdr = uiout->table.header_next->colhdr;
1010   /* Advance the header pointer to the next entry.  */
1011   uiout->table.header_next = uiout->table.header_next->next;
1012   return 1;
1013 }
1014
1015
1016 /* Verify that the field/tuple/list is correctly positioned.  Return
1017    the field number and corresponding alignment (if
1018    available/applicable).  */
1019
1020 static void
1021 verify_field (struct ui_out *uiout, int *fldno, int *width,
1022               enum ui_align *align)
1023 {
1024   struct ui_out_level *current = current_level (uiout);
1025   char *text;
1026
1027   if (uiout->table.flag)
1028     {
1029       if (!uiout->table.body_flag)
1030         internal_error (__FILE__, __LINE__,
1031                         _("table_body missing; table fields must be \
1032 specified after table_body and inside a list."));
1033       /* NOTE: cagney/2001-12-08: There was a check here to ensure
1034          that this code was only executed when uiout->level was
1035          greater than zero.  That no longer applies - this code is run
1036          before each table row tuple is started and at that point the
1037          level is zero.  */
1038     }
1039
1040   current->field_count += 1;
1041
1042   if (uiout->table.body_flag
1043       && uiout->table.entry_level == uiout->level
1044       && get_next_header (uiout, fldno, width, align, &text))
1045     {
1046       if (*fldno != current->field_count)
1047         internal_error (__FILE__, __LINE__,
1048                         _("ui-out internal error in handling headers."));
1049     }
1050   else
1051     {
1052       *width = 0;
1053       *align = ui_noalign;
1054       *fldno = current->field_count;
1055     }
1056 }
1057
1058
1059 /* Access to ui-out members data.  */
1060
1061 void *
1062 ui_out_data (struct ui_out *uiout)
1063 {
1064   return uiout->data;
1065 }
1066
1067 /* Access table field parameters.  */
1068 int
1069 ui_out_query_field (struct ui_out *uiout, int colno,
1070                     int *width, int *alignment, char **col_name)
1071 {
1072   struct ui_out_hdr *hdr;
1073
1074   if (!uiout->table.flag)
1075     return 0;
1076
1077   for (hdr = uiout->table.header_first; hdr; hdr = hdr->next)
1078     if (hdr->colno == colno)
1079       {
1080         *width = hdr->width;
1081         *alignment = hdr->alignment;
1082         *col_name = hdr->col_name;
1083         return 1;
1084       }
1085
1086   return 0;
1087 }
1088
1089 /* Initalize private members at startup.  */
1090
1091 struct ui_out *
1092 ui_out_new (const struct ui_out_impl *impl, void *data,
1093             int flags)
1094 {
1095   struct ui_out *uiout = XNEW (struct ui_out);
1096   struct ui_out_level *current = XNEW (struct ui_out_level);
1097
1098   uiout->data = data;
1099   uiout->impl = impl;
1100   uiout->flags = flags;
1101   uiout->table.flag = 0;
1102   uiout->table.body_flag = 0;
1103   uiout->level = 0;
1104   uiout->levels = NULL;
1105
1106   /* Create uiout->level 0, the default level.  */
1107   current->type = ui_out_type_tuple;
1108   current->field_count = 0;
1109   VEC_safe_push (ui_out_level_p, uiout->levels, current);
1110
1111   uiout->table.id = NULL;
1112   uiout->table.header_first = NULL;
1113   uiout->table.header_last = NULL;
1114   uiout->table.header_next = NULL;
1115   return uiout;
1116 }
1117
1118 /* Free  UIOUT and the memory areas it references.  */
1119
1120 void
1121 ui_out_destroy (struct ui_out *uiout)
1122 {
1123   int i;
1124   struct ui_out_level *current;
1125
1126   /* Make sure that all levels are freed in the case where levels have
1127      been pushed, but not popped before the ui_out object is
1128      destroyed.  */
1129   for (i = 0;
1130        VEC_iterate (ui_out_level_p, uiout->levels, i, current);
1131        ++i)
1132     xfree (current);
1133
1134   VEC_free (ui_out_level_p, uiout->levels);
1135   uo_data_destroy (uiout);
1136   clear_table (uiout);
1137   xfree (uiout);
1138 }
1139
1140 /* Standard gdb initialization hook.  */
1141
1142 void
1143 _initialize_ui_out (void)
1144 {
1145   /* nothing needs to be done */
1146 }