gdb/ui-out.c

   1 /* Output generating routines for GDB.
   2
   3    Copyright 1999, 2000, 2001, 2002 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 2 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, write to the Free Software
  22    Foundation, Inc., 59 Temple Place - Suite 330,
  23    Boston, MA 02111-1307, USA.  */
  24
  25 #include "defs.h"
  26 #include "gdb_string.h"
  27 #include "expression.h"         /* For language.h */
  28 #include "language.h"
  29 #include "ui-out.h"
  30 #include "gdb_assert.h"
  31
  32 /* table header structures */
  33
  34 struct ui_out_hdr
  35   {
  36     int colno;
  37     int width;
  38     int alignment;
  39     char *col_name;
  40     char *colhdr;
  41     struct ui_out_hdr *next;
  42   };
  43
  44 /* Maintain a stack so that the info applicable to the inner most list
  45    is always available.  Stack/nested level 0 is reserved for the
  46    top-level result. */
  47
  48 enum { MAX_UI_OUT_LEVELS = 5 };
  49
  50 struct ui_out_level
  51   {
  52     /* Count each field; the first element is for non-list fields */
  53     int field_count;
  54     /* The type of this level. */
  55     enum ui_out_type type;
  56   };
  57
  58 /* Tables are special.  Maintain a separate structure that tracks
  59    their state.  At present an output can only contain a single table
  60    but that restriction might eventually be lifted.  */
  61
  62 struct ui_out_table
  63 {
  64   /* If on, a table is being generated.  */
  65   int flag;
  66
  67   /* If on, the body of a table is being generated.  If off, the table
  68      header is being generated.  */
  69   int body_flag;
  70
  71   /* The level at which each entry of the table is to be found.  A row
  72      (a tuple) is made up of entries.  Consequently ENTRY_LEVEL is one
  73      above that of the table.  */
  74   int entry_level;
  75
  76   /* Number of table columns (as specified in the table_begin call).  */
  77   int columns;
  78
  79   /* String identifying the table (as specified in the table_begin
  80      call).  */
  81   char *id;
  82
  83   /* Points to the first table header (if any).  */
  84   struct ui_out_hdr *header_first;
  85
  86   /* Points to the last table header (if any).  */
  87   struct ui_out_hdr *header_last;
  88
  89   /* Points to header of NEXT column to format.  */
  90   struct ui_out_hdr *header_next;
  91
  92 };
  93
  94
  95 /* The ui_out structure */
  96 /* Any change here requires a corresponding one in the initialization
  97    of the default uiout, which is statically initialized */
  98
  99 struct ui_out
 100   {
 101     int flags;
 102     /* specific implementation of ui-out */
 103     struct ui_out_impl *impl;
 104     struct ui_out_data *data;
 105
 106     /* Sub structure tracking the ui-out depth.  */
 107     int level;
 108     struct ui_out_level levels[MAX_UI_OUT_LEVELS];
 109
 110     /* A table, if any.  At present only a single table is supported.  */
 111     struct ui_out_table table;
 112   };
 113
 114 /* The current (inner most) level. */
 115 static struct ui_out_level *
 116 current_level (struct ui_out *uiout)
 117 {
 118   return &uiout->levels[uiout->level];
 119 }
 120
 121 /* Create a new level, of TYPE.  Return the new level's index. */
 122 static int
 123 push_level (struct ui_out *uiout,
 124             enum ui_out_type type,
 125             const char *id)
 126 {
 127   struct ui_out_level *current;
 128   /* We had better not overflow the buffer. */
 129   uiout->level++;
 130   gdb_assert (uiout->level >= 0 && uiout->level < MAX_UI_OUT_LEVELS);
 131   current = current_level (uiout);
 132   current->field_count = 0;
 133   current->type = type;
 134   return uiout->level;
 135 }
 136
 137 /* Discard the current level, return the discarded level's index.
 138    TYPE is the type of the level being discarded. */
 139 static int
 140 pop_level (struct ui_out *uiout,
 141            enum ui_out_type type)
 142 {
 143   /* We had better not underflow the buffer. */
 144   gdb_assert (uiout->level > 0 && uiout->level < MAX_UI_OUT_LEVELS);
 145   gdb_assert (current_level (uiout)->type == type);
 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);
 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);
 187 static void default_wrap_hint (struct ui_out *uiout, char *identstring);
 188 static void default_flush (struct ui_out *uiout);
 189
 190 /* This is the default ui-out implementation functions vector */
 191
 192 struct ui_out_impl default_ui_out_impl =
 193 {
 194   default_table_begin,
 195   default_table_body,
 196   default_table_end,
 197   default_table_header,
 198   default_begin,
 199   default_end,
 200   default_field_int,
 201   default_field_skip,
 202   default_field_string,
 203   default_field_fmt,
 204   default_spaces,
 205   default_text,
 206   default_message,
 207   default_wrap_hint,
 208   default_flush,
 209   0, /* Does not need MI hacks.  */
 210 };
 211
 212 /* The default ui_out */
 213
 214 struct ui_out def_uiout =
 215 {
 216   0,                            /* flags */
 217   &default_ui_out_impl,         /* impl */
 218 };
 219
 220 /* Pointer to current ui_out */
 221 /* FIXME: This should not be a global, but something passed down from main.c
 222    or top.c */
 223
 224 struct ui_out *uiout = &def_uiout;
 225
 226 /* These are the interfaces to implementation functions */
 227
 228 static void uo_table_begin (struct ui_out *uiout, int nbrofcols,
 229                             int nr_rows, const char *tblid);
 230 static void uo_table_body (struct ui_out *uiout);
 231 static void uo_table_end (struct ui_out *uiout);
 232 static void uo_table_header (struct ui_out *uiout, int width,
 233                              enum ui_align align, const char *col_name,
 234                              const char *colhdr);
 235 static void uo_begin (struct ui_out *uiout,
 236                       enum ui_out_type type,
 237                       int level, const char *id);
 238 static void uo_end (struct ui_out *uiout,
 239                     enum ui_out_type type,
 240                     int level);
 241 static void uo_field_int (struct ui_out *uiout, int fldno, int width,
 242                           enum ui_align align, const char *fldname, int value);
 243 static void uo_field_skip (struct ui_out *uiout, int fldno, int width,
 244                            enum ui_align align, const char *fldname);
 245 static void uo_field_string (struct ui_out *uiout, int fldno, int width,
 246                              enum ui_align align, const char *fldname,
 247                              const char *string);
 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 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 static void uo_wrap_hint (struct ui_out *uiout, char *identstring);
 256 static void uo_flush (struct ui_out *uiout);
 257
 258 /* Prototypes for local functions */
 259
 260 extern void _initialize_ui_out (void);
 261 static void append_header_to_list (struct ui_out *uiout, int width,
 262                                    int alignment, const char *col_name,
 263                                    const char *colhdr);
 264 static int get_next_header (struct ui_out *uiout, int *colno, int *width,
 265                             int *alignment, char **colhdr);
 266 static void clear_header_list (struct ui_out *uiout);
 267 static void verify_field (struct ui_out *uiout, int *fldno, int *width,
 268                           int *align);
 269
 270 static void init_ui_out_state (struct ui_out *uiout);
 271
 272 /* exported functions (ui_out API) */
 273
 274 /* Mark beginning of a table */
 275
 276 void
 277 ui_out_table_begin (struct ui_out *uiout, int nbrofcols,
 278                     int nr_rows,
 279                     const char *tblid)
 280 {
 281   if (uiout->table.flag)
 282     internal_error (__FILE__, __LINE__,
 283                     "tables cannot be nested; table_begin found before \
 284 previous table_end.");
 285
 286   uiout->table.flag = 1;
 287   uiout->table.body_flag = 0;
 288   uiout->table.entry_level = uiout->level + 1;
 289   uiout->table.columns = nbrofcols;
 290   if (tblid != NULL)
 291     uiout->table.id = xstrdup (tblid);
 292   else
 293     uiout->table.id = NULL;
 294   clear_header_list (uiout);
 295
 296   uo_table_begin (uiout, nbrofcols, nr_rows, uiout->table.id);
 297 }
 298
 299 void
 300 ui_out_table_body (struct ui_out *uiout)
 301 {
 302   if (!uiout->table.flag)
 303     internal_error (__FILE__, __LINE__,
 304                     "table_body outside a table is not valid; it must be \
 305 after a table_begin and before a table_end.");
 306   if (uiout->table.body_flag)
 307     internal_error (__FILE__, __LINE__,
 308                     "extra table_body call not allowed; there must be \
 309 only one table_body after a table_begin and before a table_end.");
 310   if (uiout->table.header_next->colno != uiout->table.columns)
 311     internal_error (__FILE__, __LINE__,
 312                     "number of headers differ from number of table \
 313 columns.");
 314
 315   uiout->table.body_flag = 1;
 316   uiout->table.header_next = uiout->table.header_first;
 317
 318   uo_table_body (uiout);
 319 }
 320
 321 void
 322 ui_out_table_end (struct ui_out *uiout)
 323 {
 324   if (!uiout->table.flag)
 325     internal_error (__FILE__, __LINE__,
 326                     "misplaced table_end or missing table_begin.");
 327
 328   uiout->table.entry_level = 0;
 329   uiout->table.body_flag = 0;
 330   uiout->table.flag = 0;
 331
 332   uo_table_end (uiout);
 333
 334   if (uiout->table.id)
 335     xfree (uiout->table.id);
 336   clear_header_list (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 void
 355 ui_out_begin (struct ui_out *uiout,
 356               enum ui_out_type type,
 357               const char *id)
 358 {
 359   int new_level;
 360   if (uiout->table.flag && !uiout->table.body_flag)
 361     internal_error (__FILE__, __LINE__,
 362                     "table header or table_body expected; lists must be \
 363 specified after table_body.");
 364
 365   /* Be careful to verify the ``field'' before the new tuple/list is
 366      pushed onto the stack.  That way the containing list/table/row is
 367      verified and not the newly created tuple/list.  This verification
 368      is needed (at least) for the case where a table row entry
 369      contains either a tuple/list.  For that case bookkeeping such as
 370      updating the column count or advancing to the next heading still
 371      needs to be performed.  */
 372   {
 373     int fldno;
 374     int width;
 375     int align;
 376     verify_field (uiout, &fldno, &width, &align);
 377   }
 378
 379   new_level = push_level (uiout, type, id);
 380
 381   /* If the push puts us at the same level as a table row entry, we've
 382      got a new table row.  Put the header pointer back to the start.  */
 383   if (uiout->table.body_flag
 384       && uiout->table.entry_level == new_level)
 385     uiout->table.header_next = uiout->table.header_first;
 386
 387   uo_begin (uiout, type, new_level, id);
 388 }
 389
 390 void
 391 ui_out_list_begin (struct ui_out *uiout,
 392                    const char *id)
 393 {
 394   ui_out_begin (uiout, ui_out_type_list, id);
 395 }
 396
 397 void
 398 ui_out_tuple_begin (struct ui_out *uiout, const char *id)
 399 {
 400   ui_out_begin (uiout, ui_out_type_tuple, id);
 401 }
 402
 403 void
 404 ui_out_end (struct ui_out *uiout,
 405             enum ui_out_type type)
 406 {
 407   int old_level = pop_level (uiout, type);
 408   uo_end (uiout, type, old_level);
 409 }
 410
 411 void
 412 ui_out_list_end (struct ui_out *uiout)
 413 {
 414   ui_out_end (uiout, ui_out_type_list);
 415 }
 416
 417 void
 418 ui_out_tuple_end (struct ui_out *uiout)
 419 {
 420   ui_out_end (uiout, ui_out_type_tuple);
 421 }
 422
 423 struct ui_out_end_cleanup_data
 424 {
 425   struct ui_out *uiout;
 426   enum ui_out_type type;
 427 };
 428
 429 static void
 430 do_cleanup_end (void *data)
 431 {
 432   struct ui_out_end_cleanup_data *end_cleanup_data = data;
 433   ui_out_end (end_cleanup_data->uiout, end_cleanup_data->type);
 434   xfree (end_cleanup_data);
 435 }
 436
 437 static struct cleanup *
 438 make_cleanup_ui_out_end (struct ui_out *uiout,
 439                          enum ui_out_type type)
 440 {
 441   struct ui_out_end_cleanup_data *end_cleanup_data;
 442   end_cleanup_data = XMALLOC (struct ui_out_end_cleanup_data);
 443   end_cleanup_data->uiout = uiout;
 444   end_cleanup_data->type = type;
 445   return make_cleanup (do_cleanup_end, end_cleanup_data);
 446 }
 447
 448 struct cleanup *
 449 make_cleanup_ui_out_begin_end (struct ui_out *uiout,
 450                                enum ui_out_type type,
 451                                const char *id)
 452 {
 453   ui_out_begin (uiout, type, id);
 454   return make_cleanup_ui_out_end (uiout, type);
 455 }
 456
 457 struct cleanup *
 458 make_cleanup_ui_out_tuple_begin_end (struct ui_out *uiout,
 459                                      const char *id)
 460 {
 461   ui_out_tuple_begin (uiout, id);
 462   return make_cleanup_ui_out_end (uiout, ui_out_type_tuple);
 463 }
 464
 465 struct cleanup *
 466 make_cleanup_ui_out_list_begin_end (struct ui_out *uiout,
 467                                     const char *id)
 468 {
 469   ui_out_list_begin (uiout, id);
 470   return make_cleanup_ui_out_end (uiout, ui_out_type_list);
 471 }
 472
 473 void
 474 ui_out_field_int (struct ui_out *uiout,
 475                   const char *fldname,
 476                   int value)
 477 {
 478   int fldno;
 479   int width;
 480   int align;
 481   struct ui_out_level *current = current_level (uiout);
 482
 483   verify_field (uiout, &fldno, &width, &align);
 484
 485   uo_field_int (uiout, fldno, width, align, fldname, value);
 486 }
 487
 488 void
 489 ui_out_field_core_addr (struct ui_out *uiout,
 490                         const char *fldname,
 491                         CORE_ADDR address)
 492 {
 493   char addstr[20];
 494
 495   /* FIXME-32x64: need a print_address_numeric with field width */
 496   /* print_address_numeric (address, 1, local_stream); */
 497   strcpy (addstr, local_hex_string_custom ((unsigned long) address, "08l"));
 498
 499   ui_out_field_string (uiout, fldname, addstr);
 500 }
 501
 502 void
 503 ui_out_field_stream (struct ui_out *uiout,
 504                      const char *fldname,
 505                      struct ui_stream *buf)
 506 {
 507   long length;
 508   char *buffer = ui_file_xstrdup (buf->stream, &length);
 509   struct cleanup *old_cleanup = make_cleanup (xfree, buffer);
 510   if (length > 0)
 511     ui_out_field_string (uiout, fldname, buffer);
 512   else
 513     ui_out_field_skip (uiout, fldname);
 514   ui_file_rewind (buf->stream);
 515   do_cleanups (old_cleanup);
 516 }
 517
 518 /* used to ommit a field */
 519
 520 void
 521 ui_out_field_skip (struct ui_out *uiout,
 522                    const char *fldname)
 523 {
 524   int fldno;
 525   int width;
 526   int align;
 527
 528   verify_field (uiout, &fldno, &width, &align);
 529
 530   uo_field_skip (uiout, fldno, width, align, fldname);
 531 }
 532
 533 void
 534 ui_out_field_string (struct ui_out *uiout,
 535                      const char *fldname,
 536                      const char *string)
 537 {
 538   int fldno;
 539   int width;
 540   int align;
 541
 542   verify_field (uiout, &fldno, &width, &align);
 543
 544   uo_field_string (uiout, fldno, width, align, fldname, string);
 545 }
 546
 547 /* VARARGS */
 548 void
 549 ui_out_field_fmt (struct ui_out *uiout,
 550                   const char *fldname,
 551                   const char *format, ...)
 552 {
 553   va_list args;
 554   int fldno;
 555   int width;
 556   int align;
 557
 558   /* will not align, but has to call anyway */
 559   verify_field (uiout, &fldno, &width, &align);
 560
 561   va_start (args, format);
 562
 563   uo_field_fmt (uiout, fldno, width, align, fldname, format, args);
 564
 565   va_end (args);
 566 }
 567
 568 void
 569 ui_out_spaces (struct ui_out *uiout, int numspaces)
 570 {
 571   uo_spaces (uiout, numspaces);
 572 }
 573
 574 void
 575 ui_out_text (struct ui_out *uiout,
 576              const char *string)
 577 {
 578   uo_text (uiout, string);
 579 }
 580
 581 void
 582 ui_out_message (struct ui_out *uiout, int verbosity,
 583                 const char *format,...)
 584 {
 585   va_list args;
 586
 587   va_start (args, format);
 588
 589   uo_message (uiout, verbosity, format, args);
 590
 591   va_end (args);
 592 }
 593
 594 struct ui_stream *
 595 ui_out_stream_new (struct ui_out *uiout)
 596 {
 597   struct ui_stream *tempbuf;
 598
 599   tempbuf = XMALLOC (struct ui_stream);
 600   tempbuf->uiout = uiout;
 601   tempbuf->stream = mem_fileopen ();
 602   return tempbuf;
 603 }
 604
 605 void
 606 ui_out_stream_delete (struct ui_stream *buf)
 607 {
 608   ui_file_delete (buf->stream);
 609   xfree (buf);
 610 }
 611
 612 static void
 613 do_stream_delete (void *buf)
 614 {
 615   ui_out_stream_delete (buf);
 616 }
 617
 618 struct cleanup *
 619 make_cleanup_ui_out_stream_delete (struct ui_stream *buf)
 620 {
 621   return make_cleanup (do_stream_delete, buf);
 622 }
 623
 624
 625 void
 626 ui_out_wrap_hint (struct ui_out *uiout, char *identstring)
 627 {
 628   uo_wrap_hint (uiout, identstring);
 629 }
 630
 631 void
 632 ui_out_flush (struct ui_out *uiout)
 633 {
 634   uo_flush (uiout);
 635 }
 636
 637 /* set the flags specified by the mask given */
 638 int
 639 ui_out_set_flags (struct ui_out *uiout, int mask)
 640 {
 641   int oldflags = uiout->flags;
 642
 643   uiout->flags |= mask;
 644
 645   return oldflags;
 646 }
 647
 648 /* clear the flags specified by the mask given */
 649 int
 650 ui_out_clear_flags (struct ui_out *uiout, int mask)
 651 {
 652   int oldflags = uiout->flags;
 653
 654   uiout->flags &= ~mask;
 655
 656   return oldflags;
 657 }
 658
 659 /* test the flags against the mask given */
 660 int
 661 ui_out_test_flags (struct ui_out *uiout, int mask)
 662 {
 663   return (uiout->flags & mask);
 664 }
 665
 666 /* obtain the current verbosity level (as stablished by the
 667    'set verbositylevel' command */
 668
 669 int
 670 ui_out_get_verblvl (struct ui_out *uiout)
 671 {
 672   /* FIXME: not implemented yet */
 673   return 0;
 674 }
 675
 676 #if 0
 677 void
 678 ui_out_result_begin (struct ui_out *uiout, char *class)
 679 {
 680 }
 681
 682 void
 683 ui_out_result_end (struct ui_out *uiout)
 684 {
 685 }
 686
 687 void
 688 ui_out_info_begin (struct ui_out *uiout, char *class)
 689 {
 690 }
 691
 692 void
 693 ui_out_info_end (struct ui_out *uiout)
 694 {
 695 }
 696
 697 void
 698 ui_out_notify_begin (struct ui_out *uiout, char *class)
 699 {
 700 }
 701
 702 void
 703 ui_out_notify_end (struct ui_out *uiout)
 704 {
 705 }
 706
 707 void
 708 ui_out_error_begin (struct ui_out *uiout, char *class)
 709 {
 710 }
 711
 712 void
 713 ui_out_error_end (struct ui_out *uiout)
 714 {
 715 }
 716 #endif
 717
 718 #if 0
 719 void
 720 gdb_error (ui_out * uiout, int severity, char *format,...)
 721 {
 722   va_list args;
 723 }
 724
 725 void
 726 gdb_query (struct ui_out *uiout, int qflags, char *qprompt)
 727 {
 728 }
 729 #endif
 730
 731 int
 732 ui_out_is_mi_like_p (struct ui_out *uiout)
 733 {
 734   return uiout->impl->is_mi_like_p;
 735 }
 736
 737 /* default gdb-out hook functions */
 738
 739 static void
 740 default_table_begin (struct ui_out *uiout, int nbrofcols,
 741                      int nr_rows,
 742                      const char *tblid)
 743 {
 744 }
 745
 746 static void
 747 default_table_body (struct ui_out *uiout)
 748 {
 749 }
 750
 751 static void
 752 default_table_end (struct ui_out *uiout)
 753 {
 754 }
 755
 756 static void
 757 default_table_header (struct ui_out *uiout, int width, enum ui_align alignment,
 758                       const char *col_name,
 759                       const char *colhdr)
 760 {
 761 }
 762
 763 static void
 764 default_begin (struct ui_out *uiout,
 765                enum ui_out_type type,
 766                int level,
 767                const char *id)
 768 {
 769 }
 770
 771 static void
 772 default_end (struct ui_out *uiout,
 773              enum ui_out_type type,
 774              int level)
 775 {
 776 }
 777
 778 static void
 779 default_field_int (struct ui_out *uiout, int fldno, int width,
 780                    enum ui_align align,
 781                    const char *fldname, int value)
 782 {
 783 }
 784
 785 static void
 786 default_field_skip (struct ui_out *uiout, int fldno, int width,
 787                     enum ui_align align, const char *fldname)
 788 {
 789 }
 790
 791 static void
 792 default_field_string (struct ui_out *uiout,
 793                       int fldno,
 794                       int width,
 795                       enum ui_align align,
 796                       const char *fldname,
 797                       const char *string)
 798 {
 799 }
 800
 801 static void
 802 default_field_fmt (struct ui_out *uiout, int fldno, int width,
 803                    enum ui_align align,
 804                    const char *fldname,
 805                    const char *format,
 806                    va_list args)
 807 {
 808 }
 809
 810 static void
 811 default_spaces (struct ui_out *uiout, int numspaces)
 812 {
 813 }
 814
 815 static void
 816 default_text (struct ui_out *uiout, const char *string)
 817 {
 818 }
 819
 820 static void
 821 default_message (struct ui_out *uiout, int verbosity,
 822                  const char *format,
 823                  va_list args)
 824 {
 825 }
 826
 827 static void
 828 default_wrap_hint (struct ui_out *uiout, char *identstring)
 829 {
 830 }
 831
 832 static void
 833 default_flush (struct ui_out *uiout)
 834 {
 835 }
 836
 837 /* Interface to the implementation functions */
 838
 839 void
 840 uo_table_begin (struct ui_out *uiout, int nbrofcols,
 841                 int nr_rows,
 842                 const char *tblid)
 843 {
 844   if (!uiout->impl->table_begin)
 845     return;
 846   uiout->impl->table_begin (uiout, nbrofcols, nr_rows, tblid);
 847 }
 848
 849 void
 850 uo_table_body (struct ui_out *uiout)
 851 {
 852   if (!uiout->impl->table_body)
 853     return;
 854   uiout->impl->table_body (uiout);
 855 }
 856
 857 void
 858 uo_table_end (struct ui_out *uiout)
 859 {
 860   if (!uiout->impl->table_end)
 861     return;
 862   uiout->impl->table_end (uiout);
 863 }
 864
 865 void
 866 uo_table_header (struct ui_out *uiout, int width, enum ui_align align,
 867                  const char *col_name,
 868                  const char *colhdr)
 869 {
 870   if (!uiout->impl->table_header)
 871     return;
 872   uiout->impl->table_header (uiout, width, align, col_name, colhdr);
 873 }
 874
 875 void
 876 uo_begin (struct ui_out *uiout,
 877           enum ui_out_type type,
 878           int level,
 879           const char *id)
 880 {
 881   if (uiout->impl->begin == NULL)
 882     return;
 883   uiout->impl->begin (uiout, type, level, id);
 884 }
 885
 886 void
 887 uo_end (struct ui_out *uiout,
 888         enum ui_out_type type,
 889         int level)
 890 {
 891   if (uiout->impl->end == NULL)
 892     return;
 893   uiout->impl->end (uiout, type, level);
 894 }
 895
 896 void
 897 uo_field_int (struct ui_out *uiout, int fldno, int width, enum ui_align align,
 898               const char *fldname,
 899               int value)
 900 {
 901   if (!uiout->impl->field_int)
 902     return;
 903   uiout->impl->field_int (uiout, fldno, width, align, fldname, value);
 904 }
 905
 906 void
 907 uo_field_skip (struct ui_out *uiout, int fldno, int width, enum ui_align align,
 908                const char *fldname)
 909 {
 910   if (!uiout->impl->field_skip)
 911     return;
 912   uiout->impl->field_skip (uiout, fldno, width, align, fldname);
 913 }
 914
 915 void
 916 uo_field_string (struct ui_out *uiout, int fldno, int width,
 917                  enum ui_align align,
 918                  const char *fldname,
 919                  const char *string)
 920 {
 921   if (!uiout->impl->field_string)
 922     return;
 923   uiout->impl->field_string (uiout, fldno, width, align, fldname, string);
 924 }
 925
 926 void
 927 uo_field_fmt (struct ui_out *uiout, int fldno, int width, enum ui_align align,
 928               const char *fldname,
 929               const char *format,
 930               va_list args)
 931 {
 932   if (!uiout->impl->field_fmt)
 933     return;
 934   uiout->impl->field_fmt (uiout, fldno, width, align, fldname, format, args);
 935 }
 936
 937 void
 938 uo_spaces (struct ui_out *uiout, int numspaces)
 939 {
 940   if (!uiout->impl->spaces)
 941     return;
 942   uiout->impl->spaces (uiout, numspaces);
 943 }
 944
 945 void
 946 uo_text (struct ui_out *uiout,
 947          const char *string)
 948 {
 949   if (!uiout->impl->text)
 950     return;
 951   uiout->impl->text (uiout, string);
 952 }
 953
 954 void
 955 uo_message (struct ui_out *uiout, int verbosity,
 956             const char *format,
 957             va_list args)
 958 {
 959   if (!uiout->impl->message)
 960     return;
 961   uiout->impl->message (uiout, verbosity, format, args);
 962 }
 963
 964 void
 965 uo_wrap_hint (struct ui_out *uiout, char *identstring)
 966 {
 967   if (!uiout->impl->wrap_hint)
 968     return;
 969   uiout->impl->wrap_hint (uiout, identstring);
 970 }
 971
 972 void
 973 uo_flush (struct ui_out *uiout)
 974 {
 975   if (!uiout->impl->flush)
 976     return;
 977   uiout->impl->flush (uiout);
 978 }
 979
 980 /* local functions */
 981
 982 /* list of column headers manipulation routines */
 983
 984 static void
 985 clear_header_list (struct ui_out *uiout)
 986 {
 987   while (uiout->table.header_first != NULL)
 988     {
 989       uiout->table.header_next = uiout->table.header_first;
 990       uiout->table.header_first = uiout->table.header_first->next;
 991       if (uiout->table.header_next->colhdr != NULL)
 992         xfree (uiout->table.header_next->colhdr);
 993       xfree (uiout->table.header_next);
 994     }
 995   gdb_assert (uiout->table.header_first == NULL);
 996   uiout->table.header_last = NULL;
 997   uiout->table.header_next = NULL;
 998 }
 999
1000 static void
1001 append_header_to_list (struct ui_out *uiout,
1002                        int width,
1003                        int alignment,
1004                        const char *col_name,
1005                        const char *colhdr)
1006 {
1007   struct ui_out_hdr *temphdr;
1008
1009   temphdr = XMALLOC (struct ui_out_hdr);
1010   temphdr->width = width;
1011   temphdr->alignment = alignment;
1012   /* we have to copy the column title as the original may be an automatic */
1013   if (colhdr != NULL)
1014     temphdr->colhdr = xstrdup (colhdr);
1015   else
1016     temphdr->colhdr = NULL;
1017   if (col_name != NULL)
1018     temphdr->col_name = xstrdup (colhdr);
1019   else
1020     temphdr->col_name = xstrdup (colhdr);
1021   temphdr->next = NULL;
1022   if (uiout->table.header_first == NULL)
1023     {
1024       temphdr->colno = 1;
1025       uiout->table.header_first = temphdr;
1026       uiout->table.header_last = temphdr;
1027     }
1028   else
1029     {
1030       temphdr->colno = uiout->table.header_last->colno + 1;
1031       uiout->table.header_last->next = temphdr;
1032       uiout->table.header_last = temphdr;
1033     }
1034   uiout->table.header_next = uiout->table.header_last;
1035 }
1036
1037 /* Extract the format information for the NEXT header and and advance
1038    the header pointer.  Return 0 if there was no next header.  */
1039
1040 static int
1041 get_next_header (struct ui_out *uiout,
1042                  int *colno,
1043                  int *width,
1044                  int *alignment,
1045                  char **colhdr)
1046 {
1047   /* There may be no headers at all or we may have used all columns.  */
1048   if (uiout->table.header_next == NULL)
1049     return 0;
1050   *colno = uiout->table.header_next->colno;
1051   *width = uiout->table.header_next->width;
1052   *alignment = uiout->table.header_next->alignment;
1053   *colhdr = uiout->table.header_next->colhdr;
1054   /* Advance the header pointer to the next entry.  */
1055   uiout->table.header_next = uiout->table.header_next->next;
1056   return 1;
1057 }
1058
1059
1060 /* Verify that the field/tuple/list is correctly positioned.  Return
1061    the field number and corresponding alignment (if
1062    available/applicable).  */
1063
1064 static void
1065 verify_field (struct ui_out *uiout, int *fldno, int *width, int *align)
1066 {
1067   struct ui_out_level *current = current_level (uiout);
1068   char *text;
1069
1070   if (uiout->table.flag)
1071     {
1072       if (!uiout->table.body_flag)
1073         internal_error (__FILE__, __LINE__,
1074                         "table_body missing; table fields must be \
1075 specified after table_body and inside a list.");
1076       /* NOTE: cagney/2001-12-08: There was a check here to ensure
1077          that this code was only executed when uiout->level was
1078          greater than zero.  That no longer applies - this code is run
1079          before each table row tuple is started and at that point the
1080          level is zero.  */
1081     }
1082
1083   current->field_count += 1;
1084
1085   if (uiout->table.body_flag
1086       && uiout->table.entry_level == uiout->level
1087       && get_next_header (uiout, fldno, width, align, &text))
1088     {
1089       if (*fldno != current->field_count)
1090         internal_error (__FILE__, __LINE__,
1091                         "ui-out internal error in handling headers.");
1092     }
1093   else
1094     {
1095       *width = 0;
1096       *align = ui_noalign;
1097       *fldno = current->field_count;
1098     }
1099 }
1100
1101
1102 /* access to ui_out format private members */
1103
1104 void
1105 ui_out_get_field_separator (struct ui_out *uiout)
1106 {
1107 }
1108
1109 /* Access to ui-out members data */
1110
1111 struct ui_out_data *
1112 ui_out_data (struct ui_out *uiout)
1113 {
1114   return uiout->data;
1115 }
1116
1117 /* initalize private members at startup */
1118
1119 struct ui_out *
1120 ui_out_new (struct ui_out_impl *impl,
1121             struct ui_out_data *data,
1122             int flags)
1123 {
1124   struct ui_out *uiout = XMALLOC (struct ui_out);
1125   uiout->data = data;
1126   uiout->impl = impl;
1127   uiout->flags = flags;
1128   uiout->table.flag = 0;
1129   uiout->table.body_flag = 0;
1130   uiout->level = 0;
1131   memset (uiout->levels, 0, sizeof (uiout->levels));
1132   uiout->table.header_first = NULL;
1133   uiout->table.header_last = NULL;
1134   uiout->table.header_next = NULL;
1135   return uiout;
1136 }
1137
1138 /* standard gdb initialization hook */
1139
1140 void
1141 _initialize_ui_out (void)
1142 {
1143   /* nothing needs to be done */
1144 }