gdb/ui-out.c

   1 /* Output generating routines for GDB.
   2    Copyright 1999, 2000 Free Software Foundation, Inc.
   3    Contributed by Cygnus Solutions.
   4    Written by Fernando Nasser for Cygnus.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 59 Temple Place - Suite 330,
  21    Boston, MA 02111-1307, USA.  */
  22
  23 #include "defs.h"
  24 #include "gdb_string.h"
  25 #include "expression.h"         /* For language.h */
  26 #include "language.h"
  27 #include "ui-out.h"
  28
  29 /* Convenience macro for allocting typesafe memory. */
  30
  31 #undef XMALLOC
  32 #define XMALLOC(TYPE) (TYPE*) xmalloc (sizeof (TYPE))
  33
  34 /* table header structures */
  35
  36 struct ui_out_hdr
  37   {
  38     int colno;
  39     int width;
  40     int alignment;
  41     char *colhdr;
  42     struct ui_out_hdr *next;
  43   };
  44
  45 /* The ui_out structure */
  46 /* Any change here requires a corresponding one in the initialization
  47    of the default uiout, which is statically initialized */
  48
  49 struct ui_out
  50   {
  51     int flags;
  52     /* specific implementation of ui-out */
  53     struct ui_out_impl *impl;
  54     struct ui_out_data *data;
  55
  56     /* if on, a table is being generated */
  57     int table_flag;
  58
  59     /* if on, the body of a table is being generated */
  60     int body_flag;
  61
  62     /* number of table columns (as specified in the table_begin call) */
  63     int table_columns;
  64
  65     /* strinf identifying the table (as specified in the table_begin call) */
  66     char *table_id;
  67
  68     /* if on, a list is being generated.  The value is the level of nesting */
  69     int list_flag;
  70
  71     /* we count each field; the first element is for non-list fields */
  72     int field_count[5];
  73
  74     /* points to the first header (if any) */
  75     struct ui_out_hdr *headerfirst;
  76
  77     /* points to the last header (if any) */
  78     struct ui_out_hdr *headerlast;
  79
  80     /* points to header of next column to format */
  81     struct ui_out_hdr *headercurr;
  82
  83   };
  84
  85 /* These are the default implementation functions */
  86
  87 static void default_table_begin (struct ui_out *uiout, int nbrofcols,
  88                                  char *tblid);
  89 static void default_table_body (struct ui_out *uiout);
  90 static void default_table_end (struct ui_out *uiout);
  91 static void default_table_header (struct ui_out *uiout, int width,
  92                                   enum ui_align alig, char *colhdr);
  93 static void default_list_begin (struct ui_out *uiout, int list_flag,
  94                                 char *lstid);
  95 static void default_list_end (struct ui_out *uiout, int list_flag);
  96 static void default_field_int (struct ui_out *uiout, int fldno, int width,
  97                                enum ui_align alig, char *fldname, int value);
  98 static void default_field_skip (struct ui_out *uiout, int fldno, int width,
  99                                 enum ui_align alig, char *fldname);
 100 static void default_field_string (struct ui_out *uiout, int fldno, int width,
 101                                   enum ui_align align, char *fldname,
 102                                   const char *string);
 103 static void default_field_fmt (struct ui_out *uiout, int fldno,
 104                                int width, enum ui_align align,
 105                                char *fldname, char *format, va_list args);
 106 static void default_spaces (struct ui_out *uiout, int numspaces);
 107 static void default_text (struct ui_out *uiout, char *string);
 108 static void default_message (struct ui_out *uiout, int verbosity, char *format,
 109                              va_list args);
 110 static void default_wrap_hint (struct ui_out *uiout, char *identstring);
 111 static void default_flush (struct ui_out *uiout);
 112
 113 /* This is the default ui-out implementation functions vector */
 114
 115 struct ui_out_impl default_ui_out_impl =
 116 {
 117   default_table_begin,
 118   default_table_body,
 119   default_table_end,
 120   default_table_header,
 121   default_list_begin,
 122   default_list_end,
 123   default_field_int,
 124   default_field_skip,
 125   default_field_string,
 126   default_field_fmt,
 127   default_spaces,
 128   default_text,
 129   default_message,
 130   default_wrap_hint,
 131   default_flush
 132 };
 133
 134 /* The default ui_out */
 135
 136 struct ui_out def_uiout =
 137 {
 138   0,                            /* flags */
 139   &default_ui_out_impl,         /* impl */
 140 };
 141
 142 /* Pointer to current ui_out */
 143 /* FIXME: This should not be a global, but something passed down from main.c
 144    or top.c */
 145
 146 struct ui_out *uiout = &def_uiout;
 147
 148 /* These are the interfaces to implementation functions */
 149
 150 static void uo_table_begin (struct ui_out *uiout, int nbrofcols, char *tblid);
 151 static void uo_table_body (struct ui_out *uiout);
 152 static void uo_table_end (struct ui_out *uiout);
 153 static void uo_table_header (struct ui_out *uiout, int width,
 154                              enum ui_align align, char *colhdr);
 155 static void uo_list_begin (struct ui_out *uiout, int list_flag, char *lstid);
 156 static void uo_list_end (struct ui_out *uiout, int list_flag);
 157 static void uo_field_int (struct ui_out *uiout, int fldno, int width,
 158                           enum ui_align align, char *fldname, int value);
 159 static void uo_field_skip (struct ui_out *uiout, int fldno, int width,
 160                            enum ui_align align, char *fldname);
 161 static void uo_field_string (struct ui_out *uiout, int fldno, int width,
 162                           enum ui_align align, char *fldname, const char *string);
 163 static void uo_field_fmt (struct ui_out *uiout, int fldno, int width,
 164                           enum ui_align align, char *fldname,
 165                           char *format, va_list args);
 166 static void uo_spaces (struct ui_out *uiout, int numspaces);
 167 static void uo_text (struct ui_out *uiout, char *string);
 168 static void uo_message (struct ui_out *uiout, int verbosity,
 169                         char *format, va_list args);
 170 static void uo_wrap_hint (struct ui_out *uiout, char *identstring);
 171 static void uo_flush (struct ui_out *uiout);
 172
 173 /* Prototypes for local functions */
 174
 175 extern void _initialize_ui_out (void);
 176 static void append_header_to_list (struct ui_out *uiout, int width, int alignment, char *colhdr);
 177 static int get_curr_header (struct ui_out *uiout, int *colno, int *width,
 178                             int *alignment, char **colhdr);
 179 static void clear_header_list (struct ui_out *uiout);
 180 static void verify_field_proper_position (struct ui_out *uiout);
 181 static void verify_field_alignment (struct ui_out *uiout, int fldno, int *width, int *alignment);
 182
 183 static void init_ui_out_state (struct ui_out *uiout);
 184
 185 /* exported functions (ui_out API) */
 186
 187 /* Mark beginning of a table */
 188
 189 void
 190 ui_out_table_begin (struct ui_out *uiout, int nbrofcols, char *tblid)
 191 {
 192   if (uiout->table_flag)
 193     internal_error ("gdb/ui_out.c: tables cannot be nested; table_begin found before \
 194 previous table_end.");
 195
 196   uiout->table_flag = 1;
 197   uiout->table_columns = nbrofcols;
 198   if (tblid != NULL)
 199     uiout->table_id = xstrdup (tblid);
 200   else
 201     uiout->table_id = NULL;
 202   clear_header_list (uiout);
 203
 204   uo_table_begin (uiout, nbrofcols, uiout->table_id);
 205 }
 206
 207 void
 208 ui_out_table_body (struct ui_out *uiout)
 209 {
 210   if (!uiout->table_flag)
 211     internal_error ("gdb/ui_out.c: table_body outside a table is not valid; it must be \
 212 after a table_begin and before a table_end.");
 213   if (uiout->body_flag)
 214     internal_error ("gdb/ui_out.c: extra table_body call not allowed; there must be \
 215 only one table_body after a table_begin and before a table_end.");
 216   if (uiout->headercurr->colno != uiout->table_columns)
 217     internal_error ("gdb/ui_out.c: number of headers differ from number of table \
 218 columns.");
 219
 220   uiout->body_flag = 1;
 221   uiout->headercurr = uiout->headerfirst;
 222
 223   uo_table_body (uiout);
 224 }
 225
 226 void
 227 ui_out_table_end (struct ui_out *uiout)
 228 {
 229   if (!uiout->table_flag)
 230     internal_error ("gdb/ui_out.c: misplaced table_end or missing table_begin.");
 231
 232   uiout->body_flag = 0;
 233   uiout->table_flag = 0;
 234
 235   uo_table_end (uiout);
 236
 237   if (uiout->table_id)
 238     xfree (uiout->table_id);
 239   clear_header_list (uiout);
 240 }
 241
 242 void
 243 ui_out_table_header (struct ui_out *uiout, int width, enum ui_align alignment,
 244                      char *colhdr)
 245 {
 246   if (!uiout->table_flag || uiout->body_flag)
 247     internal_error ("ui_out: table header must be specified after table_begin \
 248 and before table_body.");
 249
 250   append_header_to_list (uiout, width, alignment, colhdr);
 251
 252   uo_table_header (uiout, width, alignment, colhdr);
 253 }
 254
 255 void
 256 ui_out_list_begin (struct ui_out *uiout, char *lstid)
 257 {
 258   if (uiout->table_flag && !uiout->body_flag)
 259     internal_error ("ui_out: table header or table_body expected; lists must be \
 260 specified after table_body.");
 261   if (uiout->list_flag >= 4)
 262     internal_error ("ui_out: list depth exceeded; only 4 levels of lists can be \
 263 nested.");
 264
 265   uiout->list_flag++;
 266   uiout->field_count[uiout->list_flag] = 0;
 267   if (uiout->table_flag && (uiout->list_flag == 1))
 268     uiout->headercurr = uiout->headerfirst;
 269
 270   uo_list_begin (uiout, uiout->list_flag, lstid);
 271 }
 272
 273 void
 274 ui_out_list_end (struct ui_out *uiout)
 275 {
 276   if (!uiout->list_flag)
 277     internal_error ("ui_out: misplaced list_end; there is no list to be closed.");
 278
 279   uo_list_end (uiout, uiout->list_flag);
 280
 281   uiout->list_flag--;
 282 }
 283
 284 static void
 285 do_list_end (void *uiout)
 286 {
 287   ui_out_list_end (uiout);
 288 }
 289
 290 struct cleanup *
 291 make_cleanup_ui_out_list_end (struct ui_out *uiout)
 292 {
 293   return make_cleanup (do_list_end, uiout);
 294 }
 295
 296 void
 297 ui_out_field_int (struct ui_out *uiout, char *fldname, int value)
 298 {
 299   int fldno;
 300   int width;
 301   int align;
 302
 303   verify_field_proper_position (uiout);
 304
 305   uiout->field_count[uiout->list_flag] += 1;
 306   fldno = uiout->field_count[uiout->list_flag];
 307
 308   verify_field_alignment (uiout, fldno, &width, &align);
 309
 310   uo_field_int (uiout, fldno, width, align, fldname, value);
 311 }
 312
 313 void
 314 ui_out_field_core_addr (struct ui_out *uiout, char *fldname, CORE_ADDR address)
 315 {
 316   char addstr[20];
 317
 318   /* FIXME-32x64: need a print_address_numeric with field width */
 319   /* print_address_numeric (address, 1, local_stream); */
 320   strcpy (addstr, local_hex_string_custom ((unsigned long) address, "08l"));
 321
 322   ui_out_field_string (uiout, fldname, addstr);
 323 }
 324
 325 void
 326 ui_out_field_stream (struct ui_out *uiout, char *fldname, struct ui_stream *buf)
 327 {
 328   long length;
 329   char *buffer = ui_file_xstrdup (buf->stream, &length);
 330   struct cleanup *old_cleanup = make_cleanup (xfree, buffer);
 331   if (length > 0)
 332     ui_out_field_string (uiout, fldname, buffer);
 333   else
 334     ui_out_field_skip (uiout, fldname);
 335   ui_file_rewind (buf->stream);
 336   do_cleanups (old_cleanup);
 337 }
 338
 339 /* used to ommit a field */
 340
 341 void
 342 ui_out_field_skip (struct ui_out *uiout, char *fldname)
 343 {
 344   int fldno;
 345   int width;
 346   int align;
 347
 348   verify_field_proper_position (uiout);
 349
 350   uiout->field_count[uiout->list_flag] += 1;
 351   fldno = uiout->field_count[uiout->list_flag];
 352
 353   verify_field_alignment (uiout, fldno, &width, &align);
 354
 355   uo_field_skip (uiout, fldno, width, align, fldname);
 356 }
 357
 358 void
 359 ui_out_field_string (struct ui_out *uiout,
 360                      char *fldname,
 361                      const char *string)
 362 {
 363   int fldno;
 364   int width;
 365   int align;
 366
 367   verify_field_proper_position (uiout);
 368
 369   uiout->field_count[uiout->list_flag] += 1;
 370   fldno = uiout->field_count[uiout->list_flag];
 371
 372   verify_field_alignment (uiout, fldno, &width, &align);
 373
 374   uo_field_string (uiout, fldno, width, align, fldname, string);
 375 }
 376
 377 /* VARARGS */
 378 void
 379 ui_out_field_fmt (struct ui_out *uiout, char *fldname, char *format,...)
 380 {
 381   va_list args;
 382   int fldno;
 383   int width;
 384   int align;
 385
 386   verify_field_proper_position (uiout);
 387
 388   uiout->field_count[uiout->list_flag] += 1;
 389   fldno = uiout->field_count[uiout->list_flag];
 390
 391   /* will not align, but has to call anyway */
 392   verify_field_alignment (uiout, fldno, &width, &align);
 393
 394   va_start (args, format);
 395
 396   uo_field_fmt (uiout, fldno, width, align, fldname, format, args);
 397
 398   va_end (args);
 399 }
 400
 401 void
 402 ui_out_spaces (struct ui_out *uiout, int numspaces)
 403 {
 404   uo_spaces (uiout, numspaces);
 405 }
 406
 407 void
 408 ui_out_text (struct ui_out *uiout, char *string)
 409 {
 410   uo_text (uiout, string);
 411 }
 412
 413 void
 414 ui_out_message (struct ui_out *uiout, int verbosity, char *format,...)
 415 {
 416   va_list args;
 417
 418   va_start (args, format);
 419
 420   uo_message (uiout, verbosity, format, args);
 421
 422   va_end (args);
 423 }
 424
 425 struct ui_stream *
 426 ui_out_stream_new (struct ui_out *uiout)
 427 {
 428   struct ui_stream *tempbuf;
 429
 430   tempbuf = XMALLOC (struct ui_stream);
 431   tempbuf->uiout = uiout;
 432   tempbuf->stream = mem_fileopen ();
 433   return tempbuf;
 434 }
 435
 436 void
 437 ui_out_stream_delete (struct ui_stream *buf)
 438 {
 439   ui_file_delete (buf->stream);
 440   xfree (buf);
 441 }
 442
 443 static void
 444 do_stream_delete (void *buf)
 445 {
 446   ui_out_stream_delete (buf);
 447 }
 448
 449 struct cleanup *
 450 make_cleanup_ui_out_stream_delete (struct ui_stream *buf)
 451 {
 452   return make_cleanup (do_stream_delete, buf);
 453 }
 454
 455
 456 void
 457 ui_out_wrap_hint (struct ui_out *uiout, char *identstring)
 458 {
 459   uo_wrap_hint (uiout, identstring);
 460 }
 461
 462 void
 463 ui_out_flush (struct ui_out *uiout)
 464 {
 465   uo_flush (uiout);
 466 }
 467
 468 /* set the flags specified by the mask given */
 469 int
 470 ui_out_set_flags (struct ui_out *uiout, int mask)
 471 {
 472   int oldflags = uiout->flags;
 473
 474   uiout->flags |= mask;
 475
 476   return oldflags;
 477 }
 478
 479 /* clear the flags specified by the mask given */
 480 int
 481 ui_out_clear_flags (struct ui_out *uiout, int mask)
 482 {
 483   int oldflags = uiout->flags;
 484
 485   uiout->flags &= ~mask;
 486
 487   return oldflags;
 488 }
 489
 490 /* test the flags against the mask given */
 491 int
 492 ui_out_test_flags (struct ui_out *uiout, int mask)
 493 {
 494   return (uiout->flags & mask);
 495 }
 496
 497 /* obtain the current verbosity level (as stablished by the
 498    'set verbositylevel' command */
 499
 500 int
 501 ui_out_get_verblvl (struct ui_out *uiout)
 502 {
 503   /* FIXME: not implemented yet */
 504   return 0;
 505 }
 506
 507 #if 0
 508 void
 509 ui_out_result_begin (struct ui_out *uiout, char *class)
 510 {
 511 }
 512
 513 void
 514 ui_out_result_end (struct ui_out *uiout)
 515 {
 516 }
 517
 518 void
 519 ui_out_info_begin (struct ui_out *uiout, char *class)
 520 {
 521 }
 522
 523 void
 524 ui_out_info_end (struct ui_out *uiout)
 525 {
 526 }
 527
 528 void
 529 ui_out_notify_begin (struct ui_out *uiout, char *class)
 530 {
 531 }
 532
 533 void
 534 ui_out_notify_end (struct ui_out *uiout)
 535 {
 536 }
 537
 538 void
 539 ui_out_error_begin (struct ui_out *uiout, char *class)
 540 {
 541 }
 542
 543 void
 544 ui_out_error_end (struct ui_out *uiout)
 545 {
 546 }
 547 #endif
 548
 549 #if 0
 550 void
 551 gdb_error (ui_out * uiout, int severity, char *format,...)
 552 {
 553   va_list args;
 554 }
 555
 556 void
 557 gdb_query (struct ui_out *uiout, int qflags, char *qprompt)
 558 {
 559 }
 560 #endif
 561
 562 /* default gdb-out hook functions */
 563
 564 static void
 565 default_table_begin (struct ui_out *uiout, int nbrofcols, char *tblid)
 566 {
 567 }
 568
 569 static void
 570 default_table_body (struct ui_out *uiout)
 571 {
 572 }
 573
 574 static void
 575 default_table_end (struct ui_out *uiout)
 576 {
 577 }
 578
 579 static void
 580 default_table_header (struct ui_out *uiout, int width, enum ui_align alignment,
 581                       char *colhdr)
 582 {
 583 }
 584
 585 static void
 586 default_list_begin (struct ui_out *uiout, int list_flag, char *lstid)
 587 {
 588 }
 589
 590 static void
 591 default_list_end (struct ui_out *uiout, int list_flag)
 592 {
 593 }
 594
 595 static void
 596 default_field_int (struct ui_out *uiout, int fldno, int width,
 597                    enum ui_align align, char *fldname, int value)
 598 {
 599 }
 600
 601 static void
 602 default_field_skip (struct ui_out *uiout, int fldno, int width,
 603                     enum ui_align align, char *fldname)
 604 {
 605 }
 606
 607 static void
 608 default_field_string (struct ui_out *uiout,
 609                       int fldno,
 610                       int width,
 611                       enum ui_align align,
 612                       char *fldname,
 613                       const char *string)
 614 {
 615 }
 616
 617 static void
 618 default_field_fmt (struct ui_out *uiout, int fldno, int width,
 619                    enum ui_align align, char *fldname, char *format,
 620                    va_list args)
 621 {
 622 }
 623
 624 static void
 625 default_spaces (struct ui_out *uiout, int numspaces)
 626 {
 627 }
 628
 629 static void
 630 default_text (struct ui_out *uiout, char *string)
 631 {
 632 }
 633
 634 static void
 635 default_message (struct ui_out *uiout, int verbosity, char *format,
 636                  va_list args)
 637 {
 638 }
 639
 640 static void
 641 default_wrap_hint (struct ui_out *uiout, char *identstring)
 642 {
 643 }
 644
 645 static void
 646 default_flush (struct ui_out *uiout)
 647 {
 648 }
 649
 650 /* Interface to the implementation functions */
 651
 652 void
 653 uo_table_begin (struct ui_out *uiout, int nbrofcols, char *tblid)
 654 {
 655   if (!uiout->impl->table_begin)
 656     return;
 657   uiout->impl->table_begin (uiout, nbrofcols, tblid);
 658 }
 659
 660 void
 661 uo_table_body (struct ui_out *uiout)
 662 {
 663   if (!uiout->impl->table_body)
 664     return;
 665   uiout->impl->table_body (uiout);
 666 }
 667
 668 void
 669 uo_table_end (struct ui_out *uiout)
 670 {
 671   if (!uiout->impl->table_end)
 672     return;
 673   uiout->impl->table_end (uiout);
 674 }
 675
 676 void
 677 uo_table_header (struct ui_out *uiout, int width, enum ui_align align, char *colhdr)
 678 {
 679   if (!uiout->impl->table_header)
 680     return;
 681   uiout->impl->table_header (uiout, width, align, colhdr);
 682 }
 683
 684 void
 685 uo_list_begin (struct ui_out *uiout, int list_flag, char *lstid)
 686 {
 687   if (!uiout->impl->list_begin)
 688     return;
 689   uiout->impl->list_begin (uiout, list_flag, lstid);
 690 }
 691
 692 void
 693 uo_list_end (struct ui_out *uiout, int list_flag)
 694 {
 695   if (!uiout->impl->list_end)
 696     return;
 697   uiout->impl->list_end (uiout, list_flag);
 698 }
 699
 700 void
 701 uo_field_int (struct ui_out *uiout, int fldno, int width, enum ui_align align, char *fldname, int value)
 702 {
 703   if (!uiout->impl->field_int)
 704     return;
 705   uiout->impl->field_int (uiout, fldno, width, align, fldname, value);
 706 }
 707
 708 void
 709 uo_field_skip (struct ui_out *uiout, int fldno, int width, enum ui_align align, char *fldname)
 710 {
 711   if (!uiout->impl->field_skip)
 712     return;
 713   uiout->impl->field_skip (uiout, fldno, width, align, fldname);
 714 }
 715
 716 void
 717 uo_field_string (struct ui_out *uiout, int fldno, int width,
 718                  enum ui_align align, char *fldname, const char *string)
 719 {
 720   if (!uiout->impl->field_string)
 721     return;
 722   uiout->impl->field_string (uiout, fldno, width, align, fldname, string);
 723 }
 724
 725 void
 726 uo_field_fmt (struct ui_out *uiout, int fldno, int width, enum ui_align align, char *fldname, char *format, va_list args)
 727 {
 728   if (!uiout->impl->field_fmt)
 729     return;
 730   uiout->impl->field_fmt (uiout, fldno, width, align, fldname, format, args);
 731 }
 732
 733 void
 734 uo_spaces (struct ui_out *uiout, int numspaces)
 735 {
 736   if (!uiout->impl->spaces)
 737     return;
 738   uiout->impl->spaces (uiout, numspaces);
 739 }
 740
 741 void
 742 uo_text (struct ui_out *uiout, char *string)
 743 {
 744   if (!uiout->impl->text)
 745     return;
 746   uiout->impl->text (uiout, string);
 747 }
 748
 749 void
 750 uo_message (struct ui_out *uiout, int verbosity, char *format, va_list args)
 751 {
 752   if (!uiout->impl->message)
 753     return;
 754   uiout->impl->message (uiout, verbosity, format, args);
 755 }
 756
 757 void
 758 uo_wrap_hint (struct ui_out *uiout, char *identstring)
 759 {
 760   if (!uiout->impl->wrap_hint)
 761     return;
 762   uiout->impl->wrap_hint (uiout, identstring);
 763 }
 764
 765 void
 766 uo_flush (struct ui_out *uiout)
 767 {
 768   if (!uiout->impl->flush)
 769     return;
 770   uiout->impl->flush (uiout);
 771 }
 772
 773 /* local functions */
 774
 775 /* list of column headers manipulation routines */
 776
 777 static void
 778 clear_header_list (struct ui_out *uiout)
 779 {
 780   while (uiout->headerfirst != NULL)
 781     {
 782       uiout->headercurr = uiout->headerfirst;
 783       uiout->headerfirst = uiout->headerfirst->next;
 784       if (uiout->headercurr->colhdr != NULL)
 785         xfree (uiout->headercurr->colhdr);
 786       xfree (uiout->headercurr);
 787     }
 788   uiout->headerlast = NULL;
 789   uiout->headercurr = NULL;
 790 }
 791
 792 static void
 793 append_header_to_list (struct ui_out *uiout,
 794                        int width,
 795                        int alignment,
 796                        char *colhdr)
 797 {
 798   struct ui_out_hdr *temphdr;
 799
 800   temphdr = XMALLOC (struct ui_out_hdr);
 801   temphdr->width = width;
 802   temphdr->alignment = alignment;
 803   /* we have to copy the column title as the original may be an automatic */
 804   if (colhdr != NULL)
 805     {
 806       temphdr->colhdr = xmalloc (strlen (colhdr) + 1);
 807       strcpy (temphdr->colhdr, colhdr);
 808     }
 809   temphdr->next = NULL;
 810   if (uiout->headerfirst == NULL)
 811     {
 812       temphdr->colno = 1;
 813       uiout->headerfirst = temphdr;
 814       uiout->headerlast = temphdr;
 815     }
 816   else
 817     {
 818       temphdr->colno = uiout->headerlast->colno + 1;
 819       uiout->headerlast->next = temphdr;
 820       uiout->headerlast = temphdr;
 821     }
 822   uiout->headercurr = uiout->headerlast;
 823 }
 824
 825 /* returns 0 if there is no more headers */
 826
 827 static int
 828 get_curr_header (struct ui_out *uiout,
 829                  int *colno,
 830                  int *width,
 831                  int *alignment,
 832                  char **colhdr)
 833 {
 834   /* There may be no headers at all or we may have used all columns */
 835   if (uiout->headercurr == NULL)
 836     return 0;
 837   *colno = uiout->headercurr->colno;
 838   *width = uiout->headercurr->width;
 839   *alignment = uiout->headercurr->alignment;
 840   *colhdr = uiout->headercurr->colhdr;
 841   uiout->headercurr = uiout->headercurr->next;
 842   return 1;
 843 }
 844
 845 /* makes sure the field_* calls were properly placed */
 846
 847 static void
 848 verify_field_proper_position (struct ui_out *uiout)
 849 {
 850   if (uiout->table_flag)
 851     {
 852       if (!uiout->body_flag)
 853         internal_error ("ui_out: table_body missing; table fields must be \
 854 specified after table_body and inside a list.");
 855       if (!uiout->list_flag)
 856         internal_error ("ui_out: list_begin missing; table fields must be \
 857 specified after table_body and inside a list.");
 858     }
 859 }
 860
 861 /* determines what is the alignment policy */
 862
 863 static void
 864 verify_field_alignment (struct ui_out *uiout,
 865                         int fldno,
 866                         int *width,
 867                         int *align)
 868 {
 869   int colno;
 870   char *text;
 871
 872   if (uiout->table_flag
 873       && get_curr_header (uiout, &colno, width, align, &text))
 874     {
 875       if (fldno != colno)
 876         internal_error ("gdb/ui-out.c: ui-out internal error in handling headers.");
 877     }
 878   else
 879     {
 880       *width = 0;
 881       *align = ui_noalign;
 882     }
 883 }
 884
 885 /* access to ui_out format private members */
 886
 887 void
 888 ui_out_get_field_separator (struct ui_out *uiout)
 889 {
 890 }
 891
 892 /* Access to ui-out members data */
 893
 894 struct ui_out_data *
 895 ui_out_data (struct ui_out *uiout)
 896 {
 897   return uiout->data;
 898 }
 899
 900 /* initalize private members at startup */
 901
 902 struct ui_out *
 903 ui_out_new (struct ui_out_impl *impl,
 904             struct ui_out_data *data,
 905             int flags)
 906 {
 907   struct ui_out *uiout = XMALLOC (struct ui_out);
 908   uiout->data = data;
 909   uiout->impl = impl;
 910   uiout->flags = flags;
 911   uiout->table_flag = 0;
 912   uiout->body_flag = 0;
 913   uiout->list_flag = 0;
 914   uiout->field_count[0] = 0;
 915   uiout->headerfirst = NULL;
 916   uiout->headerlast = NULL;
 917   uiout->headercurr = NULL;
 918   return uiout;
 919 }
 920
 921 /* standard gdb initialization hook */
 922
 923 void
 924 _initialize_ui_out (void)
 925 {
 926   /* nothing needs to be done */
 927 }