gdb/ui-out.c

   1 /* Output generating routines for GDB.
   2    Copyright 1999, 2000, 2001 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 (__FILE__, __LINE__,
 194                     "tables cannot be nested; table_begin found before \
 195 previous table_end.");
 196
 197   uiout->table_flag = 1;
 198   uiout->table_columns = nbrofcols;
 199   if (tblid != NULL)
 200     uiout->table_id = xstrdup (tblid);
 201   else
 202     uiout->table_id = NULL;
 203   clear_header_list (uiout);
 204
 205   uo_table_begin (uiout, nbrofcols, uiout->table_id);
 206 }
 207
 208 void
 209 ui_out_table_body (struct ui_out *uiout)
 210 {
 211   if (!uiout->table_flag)
 212     internal_error (__FILE__, __LINE__,
 213                     "table_body outside a table is not valid; it must be \
 214 after a table_begin and before a table_end.");
 215   if (uiout->body_flag)
 216     internal_error (__FILE__, __LINE__,
 217                     "extra table_body call not allowed; there must be \
 218 only one table_body after a table_begin and before a table_end.");
 219   if (uiout->headercurr->colno != uiout->table_columns)
 220     internal_error (__FILE__, __LINE__,
 221                     "number of headers differ from number of table \
 222 columns.");
 223
 224   uiout->body_flag = 1;
 225   uiout->headercurr = uiout->headerfirst;
 226
 227   uo_table_body (uiout);
 228 }
 229
 230 void
 231 ui_out_table_end (struct ui_out *uiout)
 232 {
 233   if (!uiout->table_flag)
 234     internal_error (__FILE__, __LINE__,
 235                     "misplaced table_end or missing table_begin.");
 236
 237   uiout->body_flag = 0;
 238   uiout->table_flag = 0;
 239
 240   uo_table_end (uiout);
 241
 242   if (uiout->table_id)
 243     xfree (uiout->table_id);
 244   clear_header_list (uiout);
 245 }
 246
 247 void
 248 ui_out_table_header (struct ui_out *uiout, int width, enum ui_align alignment,
 249                      char *colhdr)
 250 {
 251   if (!uiout->table_flag || uiout->body_flag)
 252     internal_error (__FILE__, __LINE__,
 253                     "table header must be specified after table_begin \
 254 and before table_body.");
 255
 256   append_header_to_list (uiout, width, alignment, colhdr);
 257
 258   uo_table_header (uiout, width, alignment, colhdr);
 259 }
 260
 261 void
 262 ui_out_list_begin (struct ui_out *uiout, char *lstid)
 263 {
 264   if (uiout->table_flag && !uiout->body_flag)
 265     internal_error (__FILE__, __LINE__,
 266                     "table header or table_body expected; lists must be \
 267 specified after table_body.");
 268   if (uiout->list_flag >= 4)
 269     internal_error (__FILE__, __LINE__,
 270                     "list depth exceeded; only 4 levels of lists can be \
 271 nested.");
 272
 273   uiout->list_flag++;
 274   uiout->field_count[uiout->list_flag] = 0;
 275   if (uiout->table_flag && (uiout->list_flag == 1))
 276     uiout->headercurr = uiout->headerfirst;
 277
 278   uo_list_begin (uiout, uiout->list_flag, lstid);
 279 }
 280
 281 void
 282 ui_out_list_end (struct ui_out *uiout)
 283 {
 284   if (!uiout->list_flag)
 285     internal_error (__FILE__, __LINE__,
 286                     "misplaced list_end; there is no list to be closed.");
 287
 288   uo_list_end (uiout, uiout->list_flag);
 289
 290   uiout->list_flag--;
 291 }
 292
 293 static void
 294 do_list_end (void *uiout)
 295 {
 296   ui_out_list_end (uiout);
 297 }
 298
 299 struct cleanup *
 300 make_cleanup_ui_out_list_end (struct ui_out *uiout)
 301 {
 302   return make_cleanup (do_list_end, uiout);
 303 }
 304
 305 void
 306 ui_out_field_int (struct ui_out *uiout, char *fldname, int value)
 307 {
 308   int fldno;
 309   int width;
 310   int align;
 311
 312   verify_field_proper_position (uiout);
 313
 314   uiout->field_count[uiout->list_flag] += 1;
 315   fldno = uiout->field_count[uiout->list_flag];
 316
 317   verify_field_alignment (uiout, fldno, &width, &align);
 318
 319   uo_field_int (uiout, fldno, width, align, fldname, value);
 320 }
 321
 322 void
 323 ui_out_field_core_addr (struct ui_out *uiout, char *fldname, CORE_ADDR address)
 324 {
 325   char addstr[20];
 326
 327   /* FIXME-32x64: need a print_address_numeric with field width */
 328   /* print_address_numeric (address, 1, local_stream); */
 329   strcpy (addstr, local_hex_string_custom ((unsigned long) address, "08l"));
 330
 331   ui_out_field_string (uiout, fldname, addstr);
 332 }
 333
 334 void
 335 ui_out_field_stream (struct ui_out *uiout, char *fldname, struct ui_stream *buf)
 336 {
 337   long length;
 338   char *buffer = ui_file_xstrdup (buf->stream, &length);
 339   struct cleanup *old_cleanup = make_cleanup (xfree, buffer);
 340   if (length > 0)
 341     ui_out_field_string (uiout, fldname, buffer);
 342   else
 343     ui_out_field_skip (uiout, fldname);
 344   ui_file_rewind (buf->stream);
 345   do_cleanups (old_cleanup);
 346 }
 347
 348 /* used to ommit a field */
 349
 350 void
 351 ui_out_field_skip (struct ui_out *uiout, char *fldname)
 352 {
 353   int fldno;
 354   int width;
 355   int align;
 356
 357   verify_field_proper_position (uiout);
 358
 359   uiout->field_count[uiout->list_flag] += 1;
 360   fldno = uiout->field_count[uiout->list_flag];
 361
 362   verify_field_alignment (uiout, fldno, &width, &align);
 363
 364   uo_field_skip (uiout, fldno, width, align, fldname);
 365 }
 366
 367 void
 368 ui_out_field_string (struct ui_out *uiout,
 369                      char *fldname,
 370                      const char *string)
 371 {
 372   int fldno;
 373   int width;
 374   int align;
 375
 376   verify_field_proper_position (uiout);
 377
 378   uiout->field_count[uiout->list_flag] += 1;
 379   fldno = uiout->field_count[uiout->list_flag];
 380
 381   verify_field_alignment (uiout, fldno, &width, &align);
 382
 383   uo_field_string (uiout, fldno, width, align, fldname, string);
 384 }
 385
 386 /* VARARGS */
 387 void
 388 ui_out_field_fmt (struct ui_out *uiout, char *fldname, char *format,...)
 389 {
 390   va_list args;
 391   int fldno;
 392   int width;
 393   int align;
 394
 395   verify_field_proper_position (uiout);
 396
 397   uiout->field_count[uiout->list_flag] += 1;
 398   fldno = uiout->field_count[uiout->list_flag];
 399
 400   /* will not align, but has to call anyway */
 401   verify_field_alignment (uiout, fldno, &width, &align);
 402
 403   va_start (args, format);
 404
 405   uo_field_fmt (uiout, fldno, width, align, fldname, format, args);
 406
 407   va_end (args);
 408 }
 409
 410 void
 411 ui_out_spaces (struct ui_out *uiout, int numspaces)
 412 {
 413   uo_spaces (uiout, numspaces);
 414 }
 415
 416 void
 417 ui_out_text (struct ui_out *uiout, char *string)
 418 {
 419   uo_text (uiout, string);
 420 }
 421
 422 void
 423 ui_out_message (struct ui_out *uiout, int verbosity, char *format,...)
 424 {
 425   va_list args;
 426
 427   va_start (args, format);
 428
 429   uo_message (uiout, verbosity, format, args);
 430
 431   va_end (args);
 432 }
 433
 434 struct ui_stream *
 435 ui_out_stream_new (struct ui_out *uiout)
 436 {
 437   struct ui_stream *tempbuf;
 438
 439   tempbuf = XMALLOC (struct ui_stream);
 440   tempbuf->uiout = uiout;
 441   tempbuf->stream = mem_fileopen ();
 442   return tempbuf;
 443 }
 444
 445 void
 446 ui_out_stream_delete (struct ui_stream *buf)
 447 {
 448   ui_file_delete (buf->stream);
 449   xfree (buf);
 450 }
 451
 452 static void
 453 do_stream_delete (void *buf)
 454 {
 455   ui_out_stream_delete (buf);
 456 }
 457
 458 struct cleanup *
 459 make_cleanup_ui_out_stream_delete (struct ui_stream *buf)
 460 {
 461   return make_cleanup (do_stream_delete, buf);
 462 }
 463
 464
 465 void
 466 ui_out_wrap_hint (struct ui_out *uiout, char *identstring)
 467 {
 468   uo_wrap_hint (uiout, identstring);
 469 }
 470
 471 void
 472 ui_out_flush (struct ui_out *uiout)
 473 {
 474   uo_flush (uiout);
 475 }
 476
 477 /* set the flags specified by the mask given */
 478 int
 479 ui_out_set_flags (struct ui_out *uiout, int mask)
 480 {
 481   int oldflags = uiout->flags;
 482
 483   uiout->flags |= mask;
 484
 485   return oldflags;
 486 }
 487
 488 /* clear the flags specified by the mask given */
 489 int
 490 ui_out_clear_flags (struct ui_out *uiout, int mask)
 491 {
 492   int oldflags = uiout->flags;
 493
 494   uiout->flags &= ~mask;
 495
 496   return oldflags;
 497 }
 498
 499 /* test the flags against the mask given */
 500 int
 501 ui_out_test_flags (struct ui_out *uiout, int mask)
 502 {
 503   return (uiout->flags & mask);
 504 }
 505
 506 /* obtain the current verbosity level (as stablished by the
 507    'set verbositylevel' command */
 508
 509 int
 510 ui_out_get_verblvl (struct ui_out *uiout)
 511 {
 512   /* FIXME: not implemented yet */
 513   return 0;
 514 }
 515
 516 #if 0
 517 void
 518 ui_out_result_begin (struct ui_out *uiout, char *class)
 519 {
 520 }
 521
 522 void
 523 ui_out_result_end (struct ui_out *uiout)
 524 {
 525 }
 526
 527 void
 528 ui_out_info_begin (struct ui_out *uiout, char *class)
 529 {
 530 }
 531
 532 void
 533 ui_out_info_end (struct ui_out *uiout)
 534 {
 535 }
 536
 537 void
 538 ui_out_notify_begin (struct ui_out *uiout, char *class)
 539 {
 540 }
 541
 542 void
 543 ui_out_notify_end (struct ui_out *uiout)
 544 {
 545 }
 546
 547 void
 548 ui_out_error_begin (struct ui_out *uiout, char *class)
 549 {
 550 }
 551
 552 void
 553 ui_out_error_end (struct ui_out *uiout)
 554 {
 555 }
 556 #endif
 557
 558 #if 0
 559 void
 560 gdb_error (ui_out * uiout, int severity, char *format,...)
 561 {
 562   va_list args;
 563 }
 564
 565 void
 566 gdb_query (struct ui_out *uiout, int qflags, char *qprompt)
 567 {
 568 }
 569 #endif
 570
 571 /* default gdb-out hook functions */
 572
 573 static void
 574 default_table_begin (struct ui_out *uiout, int nbrofcols, char *tblid)
 575 {
 576 }
 577
 578 static void
 579 default_table_body (struct ui_out *uiout)
 580 {
 581 }
 582
 583 static void
 584 default_table_end (struct ui_out *uiout)
 585 {
 586 }
 587
 588 static void
 589 default_table_header (struct ui_out *uiout, int width, enum ui_align alignment,
 590                       char *colhdr)
 591 {
 592 }
 593
 594 static void
 595 default_list_begin (struct ui_out *uiout, int list_flag, char *lstid)
 596 {
 597 }
 598
 599 static void
 600 default_list_end (struct ui_out *uiout, int list_flag)
 601 {
 602 }
 603
 604 static void
 605 default_field_int (struct ui_out *uiout, int fldno, int width,
 606                    enum ui_align align, char *fldname, int value)
 607 {
 608 }
 609
 610 static void
 611 default_field_skip (struct ui_out *uiout, int fldno, int width,
 612                     enum ui_align align, char *fldname)
 613 {
 614 }
 615
 616 static void
 617 default_field_string (struct ui_out *uiout,
 618                       int fldno,
 619                       int width,
 620                       enum ui_align align,
 621                       char *fldname,
 622                       const char *string)
 623 {
 624 }
 625
 626 static void
 627 default_field_fmt (struct ui_out *uiout, int fldno, int width,
 628                    enum ui_align align, char *fldname, char *format,
 629                    va_list args)
 630 {
 631 }
 632
 633 static void
 634 default_spaces (struct ui_out *uiout, int numspaces)
 635 {
 636 }
 637
 638 static void
 639 default_text (struct ui_out *uiout, char *string)
 640 {
 641 }
 642
 643 static void
 644 default_message (struct ui_out *uiout, int verbosity, char *format,
 645                  va_list args)
 646 {
 647 }
 648
 649 static void
 650 default_wrap_hint (struct ui_out *uiout, char *identstring)
 651 {
 652 }
 653
 654 static void
 655 default_flush (struct ui_out *uiout)
 656 {
 657 }
 658
 659 /* Interface to the implementation functions */
 660
 661 void
 662 uo_table_begin (struct ui_out *uiout, int nbrofcols, char *tblid)
 663 {
 664   if (!uiout->impl->table_begin)
 665     return;
 666   uiout->impl->table_begin (uiout, nbrofcols, tblid);
 667 }
 668
 669 void
 670 uo_table_body (struct ui_out *uiout)
 671 {
 672   if (!uiout->impl->table_body)
 673     return;
 674   uiout->impl->table_body (uiout);
 675 }
 676
 677 void
 678 uo_table_end (struct ui_out *uiout)
 679 {
 680   if (!uiout->impl->table_end)
 681     return;
 682   uiout->impl->table_end (uiout);
 683 }
 684
 685 void
 686 uo_table_header (struct ui_out *uiout, int width, enum ui_align align, char *colhdr)
 687 {
 688   if (!uiout->impl->table_header)
 689     return;
 690   uiout->impl->table_header (uiout, width, align, colhdr);
 691 }
 692
 693 void
 694 uo_list_begin (struct ui_out *uiout, int list_flag, char *lstid)
 695 {
 696   if (!uiout->impl->list_begin)
 697     return;
 698   uiout->impl->list_begin (uiout, list_flag, lstid);
 699 }
 700
 701 void
 702 uo_list_end (struct ui_out *uiout, int list_flag)
 703 {
 704   if (!uiout->impl->list_end)
 705     return;
 706   uiout->impl->list_end (uiout, list_flag);
 707 }
 708
 709 void
 710 uo_field_int (struct ui_out *uiout, int fldno, int width, enum ui_align align, char *fldname, int value)
 711 {
 712   if (!uiout->impl->field_int)
 713     return;
 714   uiout->impl->field_int (uiout, fldno, width, align, fldname, value);
 715 }
 716
 717 void
 718 uo_field_skip (struct ui_out *uiout, int fldno, int width, enum ui_align align, char *fldname)
 719 {
 720   if (!uiout->impl->field_skip)
 721     return;
 722   uiout->impl->field_skip (uiout, fldno, width, align, fldname);
 723 }
 724
 725 void
 726 uo_field_string (struct ui_out *uiout, int fldno, int width,
 727                  enum ui_align align, char *fldname, const char *string)
 728 {
 729   if (!uiout->impl->field_string)
 730     return;
 731   uiout->impl->field_string (uiout, fldno, width, align, fldname, string);
 732 }
 733
 734 void
 735 uo_field_fmt (struct ui_out *uiout, int fldno, int width, enum ui_align align, char *fldname, char *format, va_list args)
 736 {
 737   if (!uiout->impl->field_fmt)
 738     return;
 739   uiout->impl->field_fmt (uiout, fldno, width, align, fldname, format, args);
 740 }
 741
 742 void
 743 uo_spaces (struct ui_out *uiout, int numspaces)
 744 {
 745   if (!uiout->impl->spaces)
 746     return;
 747   uiout->impl->spaces (uiout, numspaces);
 748 }
 749
 750 void
 751 uo_text (struct ui_out *uiout, char *string)
 752 {
 753   if (!uiout->impl->text)
 754     return;
 755   uiout->impl->text (uiout, string);
 756 }
 757
 758 void
 759 uo_message (struct ui_out *uiout, int verbosity, char *format, va_list args)
 760 {
 761   if (!uiout->impl->message)
 762     return;
 763   uiout->impl->message (uiout, verbosity, format, args);
 764 }
 765
 766 void
 767 uo_wrap_hint (struct ui_out *uiout, char *identstring)
 768 {
 769   if (!uiout->impl->wrap_hint)
 770     return;
 771   uiout->impl->wrap_hint (uiout, identstring);
 772 }
 773
 774 void
 775 uo_flush (struct ui_out *uiout)
 776 {
 777   if (!uiout->impl->flush)
 778     return;
 779   uiout->impl->flush (uiout);
 780 }
 781
 782 /* local functions */
 783
 784 /* list of column headers manipulation routines */
 785
 786 static void
 787 clear_header_list (struct ui_out *uiout)
 788 {
 789   while (uiout->headerfirst != NULL)
 790     {
 791       uiout->headercurr = uiout->headerfirst;
 792       uiout->headerfirst = uiout->headerfirst->next;
 793       if (uiout->headercurr->colhdr != NULL)
 794         xfree (uiout->headercurr->colhdr);
 795       xfree (uiout->headercurr);
 796     }
 797   uiout->headerlast = NULL;
 798   uiout->headercurr = NULL;
 799 }
 800
 801 static void
 802 append_header_to_list (struct ui_out *uiout,
 803                        int width,
 804                        int alignment,
 805                        char *colhdr)
 806 {
 807   struct ui_out_hdr *temphdr;
 808
 809   temphdr = XMALLOC (struct ui_out_hdr);
 810   temphdr->width = width;
 811   temphdr->alignment = alignment;
 812   /* we have to copy the column title as the original may be an automatic */
 813   if (colhdr != NULL)
 814     {
 815       temphdr->colhdr = xmalloc (strlen (colhdr) + 1);
 816       strcpy (temphdr->colhdr, colhdr);
 817     }
 818   temphdr->next = NULL;
 819   if (uiout->headerfirst == NULL)
 820     {
 821       temphdr->colno = 1;
 822       uiout->headerfirst = temphdr;
 823       uiout->headerlast = temphdr;
 824     }
 825   else
 826     {
 827       temphdr->colno = uiout->headerlast->colno + 1;
 828       uiout->headerlast->next = temphdr;
 829       uiout->headerlast = temphdr;
 830     }
 831   uiout->headercurr = uiout->headerlast;
 832 }
 833
 834 /* returns 0 if there is no more headers */
 835
 836 static int
 837 get_curr_header (struct ui_out *uiout,
 838                  int *colno,
 839                  int *width,
 840                  int *alignment,
 841                  char **colhdr)
 842 {
 843   /* There may be no headers at all or we may have used all columns */
 844   if (uiout->headercurr == NULL)
 845     return 0;
 846   *colno = uiout->headercurr->colno;
 847   *width = uiout->headercurr->width;
 848   *alignment = uiout->headercurr->alignment;
 849   *colhdr = uiout->headercurr->colhdr;
 850   uiout->headercurr = uiout->headercurr->next;
 851   return 1;
 852 }
 853
 854 /* makes sure the field_* calls were properly placed */
 855
 856 static void
 857 verify_field_proper_position (struct ui_out *uiout)
 858 {
 859   if (uiout->table_flag)
 860     {
 861       if (!uiout->body_flag)
 862         internal_error (__FILE__, __LINE__,
 863                         "table_body missing; table fields must be \
 864 specified after table_body and inside a list.");
 865       if (!uiout->list_flag)
 866         internal_error (__FILE__, __LINE__,
 867                         "list_begin missing; table fields must be \
 868 specified after table_body and inside a list.");
 869     }
 870 }
 871
 872 /* determines what is the alignment policy */
 873
 874 static void
 875 verify_field_alignment (struct ui_out *uiout,
 876                         int fldno,
 877                         int *width,
 878                         int *align)
 879 {
 880   int colno;
 881   char *text;
 882
 883   if (uiout->table_flag
 884       && get_curr_header (uiout, &colno, width, align, &text))
 885     {
 886       if (fldno != colno)
 887         internal_error (__FILE__, __LINE__,
 888                         "ui-out internal error in handling headers.");
 889     }
 890   else
 891     {
 892       *width = 0;
 893       *align = ui_noalign;
 894     }
 895 }
 896
 897 /* access to ui_out format private members */
 898
 899 void
 900 ui_out_get_field_separator (struct ui_out *uiout)
 901 {
 902 }
 903
 904 /* Access to ui-out members data */
 905
 906 struct ui_out_data *
 907 ui_out_data (struct ui_out *uiout)
 908 {
 909   return uiout->data;
 910 }
 911
 912 /* initalize private members at startup */
 913
 914 struct ui_out *
 915 ui_out_new (struct ui_out_impl *impl,
 916             struct ui_out_data *data,
 917             int flags)
 918 {
 919   struct ui_out *uiout = XMALLOC (struct ui_out);
 920   uiout->data = data;
 921   uiout->impl = impl;
 922   uiout->flags = flags;
 923   uiout->table_flag = 0;
 924   uiout->body_flag = 0;
 925   uiout->list_flag = 0;
 926   uiout->field_count[0] = 0;
 927   uiout->headerfirst = NULL;
 928   uiout->headerlast = NULL;
 929   uiout->headercurr = NULL;
 930   return uiout;
 931 }
 932
 933 /* standard gdb initialization hook */
 934
 935 void
 936 _initialize_ui_out (void)
 937 {
 938   /* nothing needs to be done */
 939 }