gdb/varobj-iter.h

   1 /* Iterator of varobj.
   2    Copyright (C) 2013-2016 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  16
  17 /* A node or item of varobj, composed of the name and the value.  */
  18
  19 typedef struct varobj_item
  20 {
  21   /* Name of this item.  */
  22   std::string name;
  23
  24   /* Value of this item.  */
  25   struct value *value;
  26 } varobj_item;
  27
  28 struct varobj_iter_ops;
  29
  30 /* A dynamic varobj iterator "class".  */
  31
  32 struct varobj_iter
  33 {
  34   /* The 'vtable'.  */
  35   const struct varobj_iter_ops *ops;
  36
  37   /* The varobj this iterator is listing children for.  */
  38   struct varobj *var;
  39
  40   /* The next raw index we will try to check is available.  If it is
  41      equal to number_of_children, then we've already iterated the
  42      whole set.  */
  43   int next_raw_index;
  44 };
  45
  46 /* The vtable of the varobj iterator class.  */
  47
  48 struct varobj_iter_ops
  49 {
  50   /* Destructor.  Releases everything from SELF (but not SELF
  51      itself).  */
  52   void (*dtor) (struct varobj_iter *self);
  53
  54   /* Returns the next object or NULL if it has reached the end.  */
  55   varobj_item *(*next) (struct varobj_iter *self);
  56 };
  57
  58 /* Returns the next varobj or NULL if it has reached the end.  */
  59
  60 #define varobj_iter_next(ITER)  (ITER)->ops->next (ITER)
  61
  62 /* Delete a varobj_iter object.  */
  63
  64 #define varobj_iter_delete(ITER)               \
  65   do                                           \
  66     {                                          \
  67       if ((ITER) != NULL)                      \
  68         {                                      \
  69           (ITER)->ops->dtor (ITER);            \
  70           delete (ITER);                       \
  71         }                                      \
  72     } while (0)