tui-winsource.c

这个是LINUX下的GDB调度工具的源码

				       win_info->generic.content[0])->which_element.source.line_or_addr,
				      FALSE);
    }

  return;
}


/* Set or clear the has_break flag in the line whose line is line_no.  */
void
tui_set_is_exec_point_at (union tui_line_or_address l, struct tui_win_info * win_info)
{
  int changed = 0;
  int i;
  tui_win_content content = (tui_win_content) win_info->generic.content;

  i = 0;
  while (i < win_info->generic.content_size)
    {
      int new_state;

      if (content[i]->which_element.source.line_or_addr.addr == l.addr)
        new_state = TRUE;
      else
	new_state = FALSE;
      if (new_state != content[i]->which_element.source.is_exec_point)
        {
          changed++;
          content[i]->which_element.source.is_exec_point = new_state;
          tui_show_source_line (win_info, i + 1);
        }
      i++;
    }
  if (changed)
    tui_refresh_win (&win_info->generic);
}

/* Update the execution windows to show the active breakpoints.
   This is called whenever a breakpoint is inserted, removed or
   has its state changed.  */
void
tui_update_all_breakpoint_info (void)
{
  struct tui_list *list = tui_source_windows ();
  int i;

  for (i = 0; i < list->count; i++)
    {
      struct tui_win_info * win = (struct tui_win_info *) list->list[i];

      if (tui_update_breakpoint_info (win, FALSE))
        {
          tui_update_exec_info (win);
        }
    }
}


/* Scan the source window and the breakpoints to update the
   has_break information for each line.
   Returns 1 if something changed and the execution window
   must be refreshed.  */
int
tui_update_breakpoint_info (struct tui_win_info * win, int current_only)
{
  int i;
  int need_refresh = 0;
  struct tui_source_info * src = &win->detail.source_info;

  for (i = 0; i < win->generic.content_size; i++)
    {
      struct breakpoint *bp;
      extern struct breakpoint *breakpoint_chain;
      int mode;
      struct tui_source_element* line;

      line = &((struct tui_win_element *) win->generic.content[i])->which_element.source;
      if (current_only && !line->is_exec_point)
         continue;

      /* Scan each breakpoint to see if the current line has something to
         do with it.  Identify enable/disabled breakpoints as well as
         those that we already hit.  */
      mode = 0;
      for (bp = breakpoint_chain;
           bp != (struct breakpoint *) NULL;
           bp = bp->next)
        {
          if ((win == TUI_SRC_WIN
               && bp->source_file
               && (strcmp (src->filename, bp->source_file) == 0)
               && bp->line_number == line->line_or_addr.line_no)
              || (win == TUI_DISASM_WIN
                  && bp->loc->address == line->line_or_addr.addr))
            {
              if (bp->enable_state == bp_disabled)
                mode |= TUI_BP_DISABLED;
              else
                mode |= TUI_BP_ENABLED;
              if (bp->hit_count)
                mode |= TUI_BP_HIT;
              if (bp->cond)
                mode |= TUI_BP_CONDITIONAL;
              if (bp->type == bp_hardware_breakpoint)
                mode |= TUI_BP_HARDWARE;
            }
        }
      if (line->has_break != mode)
        {
          line->has_break = mode;
          need_refresh = 1;
        }
    }
  return need_refresh;
}


/* Function to initialize the content of the execution info window,
   based upon the input window which is either the source or
   disassembly window.  */
enum tui_status
tui_set_exec_info_content (struct tui_win_info * win_info)
{
  enum tui_status ret = TUI_SUCCESS;

  if (win_info->detail.source_info.execution_info != (struct tui_gen_win_info *) NULL)
    {
      struct tui_gen_win_info * exec_info_ptr = win_info->detail.source_info.execution_info;

      if (exec_info_ptr->content == NULL)
	exec_info_ptr->content =
	  (void **) tui_alloc_content (win_info->generic.height,
					 exec_info_ptr->type);
      if (exec_info_ptr->content != NULL)
	{
	  int i;

          tui_update_breakpoint_info (win_info, 1);
	  for (i = 0; i < win_info->generic.content_size; i++)
	    {
	      struct tui_win_element * element;
	      struct tui_win_element * src_element;
              int mode;

	      element = (struct tui_win_element *) exec_info_ptr->content[i];
	      src_element = (struct tui_win_element *) win_info->generic.content[i];

              memset(element->which_element.simple_string, ' ',
                     sizeof(element->which_element.simple_string));
              element->which_element.simple_string[TUI_EXECINFO_SIZE - 1] = 0;

	      /* Now update the exec info content based upon the state
                 of each line as indicated by the source content.  */
              mode = src_element->which_element.source.has_break;
              if (mode & TUI_BP_HIT)
                element->which_element.simple_string[TUI_BP_HIT_POS] =
                  (mode & TUI_BP_HARDWARE) ? 'H' : 'B';
              else if (mode & (TUI_BP_ENABLED | TUI_BP_DISABLED))
                element->which_element.simple_string[TUI_BP_HIT_POS] =
                  (mode & TUI_BP_HARDWARE) ? 'h' : 'b';

              if (mode & TUI_BP_ENABLED)
                element->which_element.simple_string[TUI_BP_BREAK_POS] = '+';
              else if (mode & TUI_BP_DISABLED)
                element->which_element.simple_string[TUI_BP_BREAK_POS] = '-';

              if (src_element->which_element.source.is_exec_point)
                element->which_element.simple_string[TUI_EXEC_POS] = '>';
	    }
	  exec_info_ptr->content_size = win_info->generic.content_size;
	}
      else
	ret = TUI_FAILURE;
    }

  return ret;
}


void
tui_show_exec_info_content (struct tui_win_info * win_info)
{
  struct tui_gen_win_info * exec_info = win_info->detail.source_info.execution_info;
  int cur_line;

  werase (exec_info->handle);
  tui_refresh_win (exec_info);
  for (cur_line = 1; (cur_line <= exec_info->content_size); cur_line++)
    mvwaddstr (exec_info->handle,
	       cur_line,
	       0,
	       ((struct tui_win_element *)
		exec_info->content[cur_line - 1])->which_element.simple_string);
  tui_refresh_win (exec_info);
  exec_info->content_in_use = TRUE;
}


void
tui_erase_exec_info_content (struct tui_win_info * win_info)
{
  struct tui_gen_win_info * exec_info = win_info->detail.source_info.execution_info;

  werase (exec_info->handle);
  tui_refresh_win (exec_info);
}

void
tui_clear_exec_info_content (struct tui_win_info * win_info)
{
  win_info->detail.source_info.execution_info->content_in_use = FALSE;
  tui_erase_exec_info_content (win_info);

  return;
}

/* Function to update the execution info window.  */
void
tui_update_exec_info (struct tui_win_info * win_info)
{
  tui_set_exec_info_content (win_info);
  tui_show_exec_info_content (win_info);
}

enum tui_status
tui_alloc_source_buffer (struct tui_win_info *win_info)
{
  char *src_line_buf;
  int i, line_width, max_lines;
  enum tui_status ret = TUI_FAILURE;

  max_lines = win_info->generic.height;	/* less the highlight box */
  line_width = win_info->generic.width - 1;
  /*
     ** Allocate the buffer for the source lines.  Do this only once since they
     ** will be re-used for all source displays.  The only other time this will
     ** be done is when a window's size changes.
   */
  if (win_info->generic.content == NULL)
    {
      src_line_buf = (char *) xmalloc ((max_lines * line_width) * sizeof (char));
      if (src_line_buf == (char *) NULL)
	fputs_unfiltered (
	   "Unable to Allocate Memory for Source or Disassembly Display.\n",
			   gdb_stderr);
      else
	{
	  /* allocate the content list */
	  if ((win_info->generic.content =
	  (void **) tui_alloc_content (max_lines, SRC_WIN)) == NULL)
	    {
	      xfree (src_line_buf);
	      src_line_buf = (char *) NULL;
	      fputs_unfiltered (
				 "Unable to Allocate Memory for Source or Disassembly Display.\n",
				 gdb_stderr);
	    }
	}
      for (i = 0; i < max_lines; i++)
	((struct tui_win_element *)
	 win_info->generic.content[i])->which_element.source.line =
	  src_line_buf + (line_width * i);
      ret = TUI_SUCCESS;
    }
  else
    ret = TUI_SUCCESS;

  return ret;
}


/* Answer whether the a particular line number or address is displayed
   in the current source window.  */
int
tui_line_is_displayed (int line, struct tui_win_info * win_info,
		       int check_threshold)
{
  int is_displayed = FALSE;
  int i, threshold;

  if (check_threshold)
    threshold = SCROLL_THRESHOLD;
  else
    threshold = 0;
  i = 0;
  while (i < win_info->generic.content_size - threshold && !is_displayed)
    {
      is_displayed = (((struct tui_win_element *)
		      win_info->generic.content[i])->which_element.source.line_or_addr.line_no
		     == (int) line);
      i++;
    }

  return is_displayed;
}


/* Answer whether the a particular line number or address is displayed
   in the current source window.  */
int
tui_addr_is_displayed (CORE_ADDR addr, struct tui_win_info * win_info,
		    int check_threshold)
{
  int is_displayed = FALSE;
  int i, threshold;

  if (check_threshold)
    threshold = SCROLL_THRESHOLD;
  else
    threshold = 0;
  i = 0;
  while (i < win_info->generic.content_size - threshold && !is_displayed)
    {
      is_displayed = (((struct tui_win_element *)
		      win_info->generic.content[i])->which_element.source.line_or_addr.addr
		     == addr);
      i++;
    }

  return is_displayed;
}


/*****************************************
** STATIC LOCAL FUNCTIONS               **
******************************************/