Use vector for varobj_list_children interface.

* gdb/varobj.c (varobj_list_children): Return vector
        of varobjs.
        * gdb/varobj.h (varobj_list_children): Adjust
        prototype.
        (varobj_p): Declare.  Declare vector thereof.
        * mi/mi-cmd-var.c (mi_cmd_var_list_children): Adjust
        for varobj_list_children change.
	* Makefile.in (varobj_h): Update dependencies.

gdb/ChangeLog

@@ -1,3 +1,15 @@
+2008-01-30  Vladimir Prus  <vladimir@codesourcery.com>
+
+	Use vector for varobj_list_children interface.
+        * gdb/varobj.c (varobj_list_children): Return vector
+        of varobjs.
+        * gdb/varobj.h (varobj_list_children): Adjust
+        prototype.
+        (varobj_p): Declare.  Declare vector thereof.
+        * mi/mi-cmd-var.c (mi_cmd_var_list_children): Adjust
+        for varobj_list_children change.
+	* Makefile.in (varobj_h): Update dependencies.
+
 2008-01-30  Thiago Jung Bauermann  <bauerman@br.ibm.com>
 
 	* ppc-sysv-tdep.c (ppc_sysv_abi_push_dummy_call): Add support for

gdb/Makefile.in

@@ -901,7 +901,7 @@ user_regs_h = user-regs.h
 valprint_h = valprint.h
 value_h = value.h $(doublest_h) $(frame_h) $(symtab_h) $(gdbtypes_h) \
 	$(expression_h)
-varobj_h = varobj.h $(symtab_h) $(gdbtypes_h)
+varobj_h = varobj.h $(symtab_h) $(gdbtypes_h) $(vec_h)
 vax_tdep_h = vax-tdep.h
 vec_h = vec.h $(gdb_assert_h) $(gdb_string_h)
 version_h = version.h

gdb/mi/mi-cmd-var.c

@@ -354,12 +354,13 @@ mi_print_value_p (struct type *type, enum print_values print_values)
 enum mi_cmd_result
 mi_cmd_var_list_children (char *command, char **argv, int argc)
 {
-  struct varobj *var;
-  struct varobj **childlist;
-  struct varobj **cc;
+  struct varobj *var;  
+  VEC(varobj_p) *children;
+  struct varobj *child;
   struct cleanup *cleanup_children;
   int numchild;
   enum print_values print_values;
+  int ix;
 
   if (argc != 1 && argc != 2)
     error (_("mi_cmd_var_list_children: Usage: [PRINT_VALUES] NAME"));
@@ -372,34 +373,28 @@ mi_cmd_var_list_children (char *command, char **argv, int argc)
   if (var == NULL)
     error (_("Variable object not found"));
 
-  numchild = varobj_list_children (var, &childlist);
-  ui_out_field_int (uiout, "numchild", numchild);
+  children = varobj_list_children (var);
+  ui_out_field_int (uiout, "numchild", VEC_length (varobj_p, children));
   if (argc == 2)
     print_values = mi_parse_values_option (argv[0]);
   else
     print_values = PRINT_NO_VALUES;
 
-  if (numchild <= 0)
-    {
-      xfree (childlist);
-      return MI_CMD_DONE;
-    }
+  if (VEC_length (varobj_p, children) == 0)
+    return MI_CMD_DONE;
 
   if (mi_version (uiout) == 1)
     cleanup_children = make_cleanup_ui_out_tuple_begin_end (uiout, "children");
   else
     cleanup_children = make_cleanup_ui_out_list_begin_end (uiout, "children");
-  cc = childlist;
-  while (*cc != NULL)
+  for (ix = 0; VEC_iterate (varobj_p, children, ix, child); ++ix)
     {
       struct cleanup *cleanup_child;
       cleanup_child = make_cleanup_ui_out_tuple_begin_end (uiout, "child");
-      print_varobj (*cc, print_values, 1 /* print expression */);
-      cc++;
+      print_varobj (child, print_values, 1 /* print expression */);
       do_cleanups (cleanup_child);
     }
   do_cleanups (cleanup_children);
-  xfree (childlist);
   return MI_CMD_DONE;
 }
 

gdb/varobj.c

@@ -83,10 +83,6 @@ struct varobj_root
   struct varobj_root *next;
 };
 
-typedef struct varobj *varobj_p;
-
-DEF_VEC_P (varobj_p);
-
 /* Every variable in the system has a structure of this type defined
    for it. This structure holds all information necessary to manipulate
    a particular object variable. Members which must be freed are noted. */
@@ -718,42 +714,28 @@ varobj_get_num_children (struct varobj *var)
 /* Creates a list of the immediate children of a variable object;
    the return code is the number of such children or -1 on error */
 
-int
-varobj_list_children (struct varobj *var, struct varobj ***childlist)
+VEC (varobj_p)*
+varobj_list_children (struct varobj *var)
 {
   struct varobj *child;
   char *name;
   int i;
 
-  /* sanity check: have we been passed a pointer? */
-  if (childlist == NULL)
-    return -1;
-
-  *childlist = NULL;
-
   if (var->num_children == -1)
     var->num_children = number_of_children (var);
 
   /* If that failed, give up.  */
   if (var->num_children == -1)
-    return -1;
+    return var->children;
 
   /* If we're called when the list of children is not yet initialized,
      allocate enough elements in it.  */
   while (VEC_length (varobj_p, var->children) < var->num_children)
     VEC_safe_push (varobj_p, var->children, NULL);
 
-  /* List of children */
-  *childlist = xmalloc ((var->num_children + 1) * sizeof (struct varobj *));
-
   for (i = 0; i < var->num_children; i++)
     {
-      varobj_p existing;
-
-      /* Mark as the end in case we bail out */
-      *((*childlist) + i) = NULL;
-
-      existing = VEC_index (varobj_p, var->children, i);
+      varobj_p existing = VEC_index (varobj_p, var->children, i);
 
       if (existing == NULL)
 	{
@@ -764,14 +746,9 @@ varobj_list_children (struct varobj *var, struct varobj ***childlist)
 	  existing = create_child (var, i, name);
 	  VEC_replace (varobj_p, var->children, i, existing);
 	}
-
-      *((*childlist) + i) = existing;
     }
 
-  /* End of list is marked by a NULL pointer */
-  *((*childlist) + i) = NULL;
-
-  return var->num_children;
+  return var->children;
 }
 
 /* Obtain the type of an object Variable as a string similar to the one gdb

gdb/varobj.h

@@ -20,6 +20,7 @@
 
 #include "symtab.h"
 #include "gdbtypes.h"
+#include "vec.h"
 
 /* Enumeration for the format types */
 enum varobj_display_formats
@@ -61,6 +62,9 @@ extern char *varobj_language_string[];
 /* Struct thar describes a variable object instance */
 struct varobj;
 
+typedef struct varobj *varobj_p;
+DEF_VEC_P (varobj_p);
+
 /* API functions */
 
 extern struct varobj *varobj_create (char *objname,
@@ -91,8 +95,9 @@ extern int varobj_get_frozen (struct varobj *var);
 
 extern int varobj_get_num_children (struct varobj *var);
 
-extern int varobj_list_children (struct varobj *var,
-				 struct varobj ***childlist);
+/* Return the list of children of VAR.  The returned vector
+   should not be modified in any way.  */
+extern VEC (varobj_p)* varobj_list_children (struct varobj *var);
 
 extern char *varobj_get_type (struct varobj *var);