gdb/tui/tui-data.c

   1 /* TUI data manipulation routines.
   2
   3    Copyright (C) 1998-2017 Free Software Foundation, Inc.
   4
   5    Contributed by Hewlett-Packard Company.
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  21
  22 #include "defs.h"
  23 #include "symtab.h"
  24 #include "tui/tui.h"
  25 #include "tui/tui-data.h"
  26 #include "tui/tui-wingeneral.h"
  27 #include "gdb_curses.h"
  28
  29 /****************************
  30 ** GLOBAL DECLARATIONS
  31 ****************************/
  32 struct tui_win_info *(tui_win_list[MAX_MAJOR_WINDOWS]);
  33
  34 /***************************
  35 ** Private data
  36 ****************************/
  37 static enum tui_layout_type current_layout = UNDEFINED_LAYOUT;
  38 static int term_height, term_width;
  39 static struct tui_gen_win_info _locator;
  40 static struct tui_gen_win_info exec_info[2];
  41 static struct tui_win_info *src_win_list[2];
  42 static struct tui_list source_windows = {src_win_list, 0};
  43 static int default_tab_len = DEFAULT_TAB_LEN;
  44 static struct tui_win_info *win_with_focus = NULL;
  45 static struct tui_layout_def layout_def = {
  46   SRC_WIN,                      /* DISPLAY_MODE */
  47   FALSE};                       /* SPLIT */
  48
  49 static int win_resized = FALSE;
  50
  51
  52 /*********************************
  53 ** Static function forward decls
  54 **********************************/
  55 static void free_content (tui_win_content,
  56                           int,
  57                           enum tui_win_type);
  58 static void free_content_elements (tui_win_content,
  59                                    int,
  60                                    enum tui_win_type);
  61
  62
  63
  64 /*********************************
  65 ** PUBLIC FUNCTIONS
  66 **********************************/
  67
  68 int
  69 tui_win_is_source_type (enum tui_win_type win_type)
  70 {
  71   return (win_type == SRC_WIN || win_type == DISASSEM_WIN);
  72 }
  73
  74 int
  75 tui_win_is_auxillary (enum tui_win_type win_type)
  76 {
  77   return (win_type > MAX_MAJOR_WINDOWS);
  78 }
  79
  80 int
  81 tui_win_has_locator (struct tui_win_info *win_info)
  82 {
  83   return (win_info != NULL
  84           && win_info->detail.source_info.has_locator);
  85 }
  86
  87 void
  88 tui_set_win_highlight (struct tui_win_info *win_info,
  89                        int highlight)
  90 {
  91   if (win_info != NULL)
  92     win_info->is_highlighted = highlight;
  93 }
  94
  95 /******************************************
  96 ** ACCESSORS & MUTATORS FOR PRIVATE DATA
  97 ******************************************/
  98
  99 /* Answer a whether the terminal window has been resized or not.  */
 100 int
 101 tui_win_resized (void)
 102 {
 103   return win_resized;
 104 }
 105
 106
 107 /* Set a whether the terminal window has been resized or not.  */
 108 void
 109 tui_set_win_resized_to (int resized)
 110 {
 111   win_resized = resized;
 112 }
 113
 114
 115 /* Answer a pointer to the current layout definition.  */
 116 struct tui_layout_def *
 117 tui_layout_def (void)
 118 {
 119   return &layout_def;
 120 }
 121
 122
 123 /* Answer the window with the logical focus.  */
 124 struct tui_win_info *
 125 tui_win_with_focus (void)
 126 {
 127   return win_with_focus;
 128 }
 129
 130
 131 /* Set the window that has the logical focus.  */
 132 void
 133 tui_set_win_with_focus (struct tui_win_info *win_info)
 134 {
 135   win_with_focus = win_info;
 136 }
 137
 138
 139 /* Answer the length in chars, of tabs.  */
 140 int
 141 tui_default_tab_len (void)
 142 {
 143   return default_tab_len;
 144 }
 145
 146
 147 /* Set the length in chars, of tabs.  */
 148 void
 149 tui_set_default_tab_len (int len)
 150 {
 151   default_tab_len = len;
 152 }
 153
 154
 155 /* Accessor for the current source window.  Usually there is only one
 156    source window (either source or disassembly), but both can be
 157    displayed at the same time.  */
 158 struct tui_list *
 159 tui_source_windows (void)
 160 {
 161   return &source_windows;
 162 }
 163
 164
 165 /* Clear the list of source windows.  Usually there is only one source
 166    window (either source or disassembly), but both can be displayed at
 167    the same time.  */
 168 void
 169 tui_clear_source_windows (void)
 170 {
 171   source_windows.list[0] = NULL;
 172   source_windows.list[1] = NULL;
 173   source_windows.count = 0;
 174 }
 175
 176
 177 /* Clear the pertinant detail in the source windows.  */
 178 void
 179 tui_clear_source_windows_detail (void)
 180 {
 181   int i;
 182
 183   for (i = 0; i < (tui_source_windows ())->count; i++)
 184     tui_clear_win_detail ((tui_source_windows ())->list[i]);
 185 }
 186
 187
 188 /* Add a window to the list of source windows.  Usually there is only
 189    one source window (either source or disassembly), but both can be
 190    displayed at the same time.  */
 191 void
 192 tui_add_to_source_windows (struct tui_win_info *win_info)
 193 {
 194   if (source_windows.count < 2)
 195     source_windows.list[source_windows.count++] = win_info;
 196 }
 197
 198
 199 /* Clear the pertinant detail in the windows.  */
 200 void
 201 tui_clear_win_detail (struct tui_win_info *win_info)
 202 {
 203   if (win_info != NULL)
 204     {
 205       switch (win_info->generic.type)
 206         {
 207         case SRC_WIN:
 208         case DISASSEM_WIN:
 209           win_info->detail.source_info.gdbarch = NULL;
 210           win_info->detail.source_info.start_line_or_addr.loa = LOA_ADDRESS;
 211           win_info->detail.source_info.start_line_or_addr.u.addr = 0;
 212           win_info->detail.source_info.horizontal_offset = 0;
 213           break;
 214         case CMD_WIN:
 215           wmove (win_info->generic.handle, 0, 0);
 216           break;
 217         case DATA_WIN:
 218           win_info->detail.data_display_info.data_content =
 219             (tui_win_content) NULL;
 220           win_info->detail.data_display_info.data_content_count = 0;
 221           win_info->detail.data_display_info.regs_content =
 222             (tui_win_content) NULL;
 223           win_info->detail.data_display_info.regs_content_count = 0;
 224           win_info->detail.data_display_info.regs_column_count = 1;
 225           win_info->detail.data_display_info.display_regs = FALSE;
 226           break;
 227         default:
 228           break;
 229         }
 230     }
 231 }
 232
 233
 234 /* Accessor for the source execution info ptr.  */
 235 struct tui_gen_win_info *
 236 tui_source_exec_info_win_ptr (void)
 237 {
 238   return &exec_info[0];
 239 }
 240
 241
 242 /* Accessor for the disassem execution info ptr.  */
 243 struct tui_gen_win_info *
 244 tui_disassem_exec_info_win_ptr (void)
 245 {
 246   return &exec_info[1];
 247 }
 248
 249
 250 /* Accessor for the locator win info.  Answers a pointer to the static
 251    locator win info struct.  */
 252 struct tui_gen_win_info *
 253 tui_locator_win_info_ptr (void)
 254 {
 255   return &_locator;
 256 }
 257
 258
 259 /* Accessor for the term_height.  */
 260 int
 261 tui_term_height (void)
 262 {
 263   return term_height;
 264 }
 265
 266
 267 /* Mutator for the term height.  */
 268 void
 269 tui_set_term_height_to (int h)
 270 {
 271   term_height = h;
 272 }
 273
 274
 275 /* Accessor for the term_width.  */
 276 int
 277 tui_term_width (void)
 278 {
 279   return term_width;
 280 }
 281
 282
 283 /* Mutator for the term_width.  */
 284 void
 285 tui_set_term_width_to (int w)
 286 {
 287   term_width = w;
 288 }
 289
 290
 291 /* Accessor for the current layout.  */
 292 enum tui_layout_type
 293 tui_current_layout (void)
 294 {
 295   return current_layout;
 296 }
 297
 298
 299 /* Mutator for the current layout.  */
 300 void
 301 tui_set_current_layout_to (enum tui_layout_type new_layout)
 302 {
 303   current_layout = new_layout;
 304 }
 305
 306
 307 /*****************************
 308 ** OTHER PUBLIC FUNCTIONS
 309 *****************************/
 310
 311
 312 /* Answer the next window in the list, cycling back to the top if
 313    necessary.  */
 314 struct tui_win_info *
 315 tui_next_win (struct tui_win_info *cur_win)
 316 {
 317   int type = cur_win->generic.type;
 318   struct tui_win_info *next_win = NULL;
 319
 320   if (cur_win->generic.type == CMD_WIN)
 321     type = SRC_WIN;
 322   else
 323     type = cur_win->generic.type + 1;
 324   while (type != cur_win->generic.type && (next_win == NULL))
 325     {
 326       if (tui_win_list[type]
 327           && tui_win_list[type]->generic.is_visible)
 328         next_win = tui_win_list[type];
 329       else
 330         {
 331           if (type == CMD_WIN)
 332             type = SRC_WIN;
 333           else
 334             type++;
 335         }
 336     }
 337
 338   return next_win;
 339 }
 340
 341
 342 /* Answer the prev window in the list, cycling back to the bottom if
 343    necessary.  */
 344 struct tui_win_info *
 345 tui_prev_win (struct tui_win_info *cur_win)
 346 {
 347   int type = cur_win->generic.type;
 348   struct tui_win_info *prev = NULL;
 349
 350   if (cur_win->generic.type == SRC_WIN)
 351     type = CMD_WIN;
 352   else
 353     type = cur_win->generic.type - 1;
 354   while (type != cur_win->generic.type && (prev == NULL))
 355     {
 356       if (tui_win_list[type]
 357           && tui_win_list[type]->generic.is_visible)
 358         prev = tui_win_list[type];
 359       else
 360         {
 361           if (type == SRC_WIN)
 362             type = CMD_WIN;
 363           else
 364             type--;
 365         }
 366     }
 367
 368   return prev;
 369 }
 370
 371
 372 /* Answer the window represented by name.  */
 373 struct tui_win_info *
 374 tui_partial_win_by_name (char *name)
 375 {
 376   struct tui_win_info *win_info = NULL;
 377
 378   if (name != (char *) NULL)
 379     {
 380       int i = 0;
 381
 382       while (i < MAX_MAJOR_WINDOWS && win_info == NULL)
 383         {
 384           if (tui_win_list[i] != 0)
 385             {
 386               const char *cur_name =
 387                 tui_win_name (&tui_win_list[i]->generic);
 388
 389               if (strlen (name) <= strlen (cur_name)
 390                   && startswith (cur_name, name))
 391                 win_info = tui_win_list[i];
 392             }
 393           i++;
 394         }
 395     }
 396
 397   return win_info;
 398 }
 399
 400
 401 /* Answer the name of the window.  */
 402 const char *
 403 tui_win_name (const struct tui_gen_win_info *win_info)
 404 {
 405   const char *name = NULL;
 406
 407   switch (win_info->type)
 408     {
 409     case SRC_WIN:
 410       name = SRC_NAME;
 411       break;
 412     case CMD_WIN:
 413       name = CMD_NAME;
 414       break;
 415     case DISASSEM_WIN:
 416       name = DISASSEM_NAME;
 417       break;
 418     case DATA_WIN:
 419       name = DATA_NAME;
 420       break;
 421     default:
 422       name = "";
 423       break;
 424     }
 425
 426   return name;
 427 }
 428
 429
 430 void
 431 tui_initialize_static_data (void)
 432 {
 433   tui_init_generic_part (tui_source_exec_info_win_ptr ());
 434   tui_init_generic_part (tui_disassem_exec_info_win_ptr ());
 435   tui_init_generic_part (tui_locator_win_info_ptr ());
 436 }
 437
 438
 439 struct tui_gen_win_info *
 440 tui_alloc_generic_win_info (void)
 441 {
 442   struct tui_gen_win_info *win = XNEW (struct tui_gen_win_info);
 443
 444   if (win != NULL)
 445     tui_init_generic_part (win);
 446
 447   return win;
 448 }
 449
 450
 451 void
 452 tui_init_generic_part (struct tui_gen_win_info *win)
 453 {
 454   win->width =
 455     win->height =
 456     win->origin.x =
 457     win->origin.y =
 458     win->viewport_height =
 459     win->content_size =
 460     win->last_visible_line = 0;
 461   win->handle = NULL;
 462   win->content = NULL;
 463   win->content_in_use =
 464     win->is_visible = FALSE;
 465   win->title = 0;
 466 }
 467
 468
 469 /* init_content_element().
 470  */
 471 static void
 472 init_content_element (struct tui_win_element *element,
 473                       enum tui_win_type type)
 474 {
 475   element->highlight = FALSE;
 476   switch (type)
 477     {
 478     case SRC_WIN:
 479     case DISASSEM_WIN:
 480       element->which_element.source.line = NULL;
 481       element->which_element.source.line_or_addr.loa = LOA_LINE;
 482       element->which_element.source.line_or_addr.u.line_no = 0;
 483       element->which_element.source.is_exec_point = FALSE;
 484       element->which_element.source.has_break = FALSE;
 485       break;
 486     case DATA_WIN:
 487       tui_init_generic_part (&element->which_element.data_window);
 488       element->which_element.data_window.type = DATA_ITEM_WIN;
 489       element->which_element.data_window.content =
 490         tui_alloc_content (1, DATA_ITEM_WIN);
 491       element->which_element.data_window.content_size = 1;
 492       break;
 493     case CMD_WIN:
 494       element->which_element.command.line = NULL;
 495       break;
 496     case DATA_ITEM_WIN:
 497       element->which_element.data.name = NULL;
 498       element->which_element.data.type = TUI_REGISTER;
 499       element->which_element.data.item_no = UNDEFINED_ITEM;
 500       element->which_element.data.value = NULL;
 501       element->which_element.data.highlight = FALSE;
 502       element->which_element.data.content = NULL;
 503       break;
 504     case LOCATOR_WIN:
 505       element->which_element.locator.full_name[0] =
 506         element->which_element.locator.proc_name[0] = (char) 0;
 507       element->which_element.locator.line_no = 0;
 508       element->which_element.locator.addr = 0;
 509       break;
 510     case EXEC_INFO_WIN:
 511       memset(element->which_element.simple_string, ' ',
 512              sizeof(element->which_element.simple_string));
 513       break;
 514     default:
 515       break;
 516     }
 517 }
 518
 519 static void
 520 init_win_info (struct tui_win_info *win_info)
 521 {
 522   tui_init_generic_part (&win_info->generic);
 523   win_info->can_highlight =
 524     win_info->is_highlighted = FALSE;
 525   switch (win_info->generic.type)
 526     {
 527     case SRC_WIN:
 528     case DISASSEM_WIN:
 529       win_info->detail.source_info.execution_info
 530         = (struct tui_gen_win_info *) NULL;
 531       win_info->detail.source_info.has_locator = FALSE;
 532       win_info->detail.source_info.horizontal_offset = 0;
 533       win_info->detail.source_info.gdbarch = NULL;
 534       win_info->detail.source_info.start_line_or_addr.loa = LOA_ADDRESS;
 535       win_info->detail.source_info.start_line_or_addr.u.addr = 0;
 536       win_info->detail.source_info.fullname = NULL;
 537       break;
 538     case DATA_WIN:
 539       win_info->detail.data_display_info.data_content = (tui_win_content) NULL;
 540       win_info->detail.data_display_info.data_content_count = 0;
 541       win_info->detail.data_display_info.regs_content = (tui_win_content) NULL;
 542       win_info->detail.data_display_info.regs_content_count = 0;
 543       win_info->detail.data_display_info.regs_column_count = 1;
 544       win_info->detail.data_display_info.display_regs = FALSE;
 545       win_info->detail.data_display_info.current_group = 0;
 546       break;
 547     case CMD_WIN:
 548       break;
 549     default:
 550       win_info->detail.opaque = NULL;
 551       break;
 552     }
 553 }
 554
 555
 556 struct tui_win_info *
 557 tui_alloc_win_info (enum tui_win_type type)
 558 {
 559   struct tui_win_info *win_info = XNEW (struct tui_win_info);
 560
 561   if (win_info != NULL)
 562     {
 563       win_info->generic.type = type;
 564       init_win_info (win_info);
 565     }
 566
 567   return win_info;
 568 }
 569
 570
 571 /* Allocates the content and elements in a block.  */
 572 tui_win_content
 573 tui_alloc_content (int num_elements, enum tui_win_type type)
 574 {
 575   tui_win_content content;
 576   struct tui_win_element *element_block_ptr;
 577   int i;
 578
 579   content = XNEWVEC (struct tui_win_element *, num_elements);
 580
 581   /*
 582    * All windows, except the data window, can allocate the
 583    * elements in a chunk.  The data window cannot because items
 584    * can be added/removed from the data display by the user at any
 585    * time.
 586    */
 587   if (type != DATA_WIN)
 588     {
 589       element_block_ptr = XNEWVEC (struct tui_win_element, num_elements);
 590       for (i = 0; i < num_elements; i++)
 591         {
 592           content[i] = element_block_ptr;
 593           init_content_element (content[i], type);
 594           element_block_ptr++;
 595         }
 596     }
 597
 598   return content;
 599 }
 600
 601
 602 /* Adds the input number of elements to the windows's content.  If no
 603    content has been allocated yet, alloc_content() is called to do
 604    this.  The index of the first element added is returned, unless
 605    there is a memory allocation error, in which case, (-1) is
 606    returned.  */
 607 int
 608 tui_add_content_elements (struct tui_gen_win_info *win_info,
 609                           int num_elements)
 610 {
 611   struct tui_win_element *element_ptr;
 612   int i, index_start;
 613
 614   if (win_info->content == NULL)
 615     {
 616       win_info->content = tui_alloc_content (num_elements, win_info->type);
 617       index_start = 0;
 618     }
 619   else
 620     index_start = win_info->content_size;
 621   if (win_info->content != NULL)
 622     {
 623       for (i = index_start; (i < num_elements + index_start); i++)
 624         {
 625           element_ptr = XNEW (struct tui_win_element);
 626           if (element_ptr != NULL)
 627             {
 628               win_info->content[i] = element_ptr;
 629               init_content_element (element_ptr, win_info->type);
 630               win_info->content_size++;
 631             }
 632           else  /* Things must be really hosed now!  We ran out of
 633                    memory!?  */
 634             return (-1);
 635         }
 636     }
 637
 638   return index_start;
 639 }
 640
 641
 642 /* Delete all curses windows associated with win_info, leaving
 643    everything else intact.  */
 644 void
 645 tui_del_window (struct tui_win_info *win_info)
 646 {
 647   struct tui_gen_win_info *generic_win;
 648
 649   switch (win_info->generic.type)
 650     {
 651     case SRC_WIN:
 652     case DISASSEM_WIN:
 653       generic_win = tui_locator_win_info_ptr ();
 654       if (generic_win != (struct tui_gen_win_info *) NULL)
 655         {
 656           tui_delete_win (generic_win->handle);
 657           generic_win->handle = NULL;
 658           generic_win->is_visible = FALSE;
 659         }
 660       if (win_info->detail.source_info.fullname)
 661         {
 662           xfree (win_info->detail.source_info.fullname);
 663           win_info->detail.source_info.fullname = NULL;
 664         }
 665       generic_win = win_info->detail.source_info.execution_info;
 666       if (generic_win != (struct tui_gen_win_info *) NULL)
 667         {
 668           tui_delete_win (generic_win->handle);
 669           generic_win->handle = NULL;
 670           generic_win->is_visible = FALSE;
 671         }
 672       break;
 673     case DATA_WIN:
 674       if (win_info->generic.content != NULL)
 675         {
 676           tui_del_data_windows (win_info->detail.data_display_info.regs_content,
 677                                 win_info->detail.data_display_info.regs_content_count);
 678           tui_del_data_windows (win_info->detail.data_display_info.data_content,
 679                                 win_info->detail.data_display_info.data_content_count);
 680         }
 681       break;
 682     default:
 683       break;
 684     }
 685   if (win_info->generic.handle != (WINDOW *) NULL)
 686     {
 687       tui_delete_win (win_info->generic.handle);
 688       win_info->generic.handle = NULL;
 689       win_info->generic.is_visible = FALSE;
 690     }
 691 }
 692
 693
 694 void
 695 tui_free_window (struct tui_win_info *win_info)
 696 {
 697   struct tui_gen_win_info *generic_win;
 698
 699   switch (win_info->generic.type)
 700     {
 701     case SRC_WIN:
 702     case DISASSEM_WIN:
 703       if (win_info->detail.source_info.fullname)
 704         {
 705           xfree (win_info->detail.source_info.fullname);
 706           win_info->detail.source_info.fullname = NULL;
 707         }
 708       generic_win = win_info->detail.source_info.execution_info;
 709       if (generic_win != (struct tui_gen_win_info *) NULL)
 710         {
 711           tui_delete_win (generic_win->handle);
 712           generic_win->handle = NULL;
 713           tui_free_win_content (generic_win);
 714         }
 715       break;
 716     case DATA_WIN:
 717       if (win_info->generic.content != NULL)
 718         {
 719           tui_free_data_content (win_info->detail.data_display_info.regs_content,
 720                                  win_info->detail.data_display_info.regs_content_count);
 721           win_info->detail.data_display_info.regs_content =
 722             (tui_win_content) NULL;
 723           win_info->detail.data_display_info.regs_content_count = 0;
 724           tui_free_data_content (win_info->detail.data_display_info.data_content,
 725                                  win_info->detail.data_display_info.data_content_count);
 726           win_info->detail.data_display_info.data_content =
 727             (tui_win_content) NULL;
 728           win_info->detail.data_display_info.data_content_count = 0;
 729           win_info->detail.data_display_info.regs_column_count = 1;
 730           win_info->detail.data_display_info.display_regs = FALSE;
 731           win_info->generic.content = NULL;
 732           win_info->generic.content_size = 0;
 733         }
 734       break;
 735     default:
 736       break;
 737     }
 738   if (win_info->generic.handle != (WINDOW *) NULL)
 739     {
 740       tui_delete_win (win_info->generic.handle);
 741       win_info->generic.handle = NULL;
 742       tui_free_win_content (&win_info->generic);
 743     }
 744   if (win_info->generic.title)
 745     xfree (win_info->generic.title);
 746   xfree (win_info);
 747 }
 748
 749
 750 void
 751 tui_free_all_source_wins_content (void)
 752 {
 753   int i;
 754
 755   for (i = 0; i < (tui_source_windows ())->count; i++)
 756     {
 757       struct tui_win_info *win_info = (tui_source_windows ())->list[i];
 758
 759       if (win_info != NULL)
 760         {
 761           tui_free_win_content (&(win_info->generic));
 762           tui_free_win_content (win_info->detail.source_info.execution_info);
 763         }
 764     }
 765 }
 766
 767
 768 void
 769 tui_free_win_content (struct tui_gen_win_info *win_info)
 770 {
 771   if (win_info->content != NULL)
 772     {
 773       free_content ((tui_win_content) win_info->content,
 774                    win_info->content_size,
 775                    win_info->type);
 776       win_info->content = NULL;
 777     }
 778   win_info->content_size = 0;
 779 }
 780
 781
 782 void
 783 tui_del_data_windows (tui_win_content content,
 784                       int content_size)
 785 {
 786   int i;
 787
 788   /* Remember that data window content elements are of type struct
 789      tui_gen_win_info *, each of which whose single element is a data
 790      element.  */
 791   for (i = 0; i < content_size; i++)
 792     {
 793       struct tui_gen_win_info *generic_win
 794         = &content[i]->which_element.data_window;
 795
 796       if (generic_win != (struct tui_gen_win_info *) NULL)
 797         {
 798           tui_delete_win (generic_win->handle);
 799           generic_win->handle = NULL;
 800           generic_win->is_visible = FALSE;
 801         }
 802     }
 803 }
 804
 805
 806 void
 807 tui_free_data_content (tui_win_content content,
 808                        int content_size)
 809 {
 810   int i;
 811
 812   /* Remember that data window content elements are of type struct
 813      tui_gen_win_info *, each of which whose single element is a data
 814      element.  */
 815   for (i = 0; i < content_size; i++)
 816     {
 817       struct tui_gen_win_info *generic_win
 818         = &content[i]->which_element.data_window;
 819
 820       if (generic_win != (struct tui_gen_win_info *) NULL)
 821         {
 822           tui_delete_win (generic_win->handle);
 823           generic_win->handle = NULL;
 824           tui_free_win_content (generic_win);
 825         }
 826     }
 827   free_content (content,
 828                 content_size,
 829                 DATA_WIN);
 830 }
 831
 832
 833 /**********************************
 834 ** LOCAL STATIC FUNCTIONS        **
 835 **********************************/
 836
 837
 838 static void
 839 free_content (tui_win_content content,
 840               int content_size,
 841               enum tui_win_type win_type)
 842 {
 843   if (content != (tui_win_content) NULL)
 844     {
 845       free_content_elements (content, content_size, win_type);
 846       xfree (content);
 847     }
 848 }
 849
 850
 851 /* free_content_elements().
 852  */
 853 static void
 854 free_content_elements (tui_win_content content,
 855                        int content_size,
 856                        enum tui_win_type type)
 857 {
 858   if (content != (tui_win_content) NULL)
 859     {
 860       int i;
 861
 862       if (type == SRC_WIN || type == DISASSEM_WIN)
 863         {
 864           /* Free whole source block.  */
 865           xfree (content[0]->which_element.source.line);
 866         }
 867       else
 868         {
 869           for (i = 0; i < content_size; i++)
 870             {
 871               struct tui_win_element *element;
 872
 873               element = content[i];
 874               if (element != (struct tui_win_element *) NULL)
 875                 {
 876                   switch (type)
 877                     {
 878                     case DATA_WIN:
 879                       xfree (element);
 880                       break;
 881                     case DATA_ITEM_WIN:
 882                       /* Note that data elements are not allocated in
 883                          a single block, but individually, as
 884                          needed.  */
 885                       if (element->which_element.data.type != TUI_REGISTER)
 886                         xfree ((void *)element->which_element.data.name);
 887                       xfree (element->which_element.data.value);
 888                       xfree (element->which_element.data.content);
 889                       xfree (element);
 890                       break;
 891                     case CMD_WIN:
 892                       xfree (element->which_element.command.line);
 893                       break;
 894                     default:
 895                       break;
 896                     }
 897                 }
 898             }
 899         }
 900       if (type != DATA_WIN && type != DATA_ITEM_WIN)
 901         xfree (content[0]);     /* Free the element block.  */
 902     }
 903 }