abt: Drop child parameters from 'reaugment' function.

[pspp] / src / libpspp / tower.c

diff --git a/src/libpspp/tower.c b/src/libpspp/tower.c
index e8d253d086731c61dd539962cbc79f9c2b3b0750..bdaaffbca3460c02caa59a6d00e29edc2b17fcd7 100644 (file)
--- a/src/libpspp/tower.c
+++ b/src/libpspp/tower.c
@@ -1,5 +1,5 @@
 /* PSPP - a program for statistical analysis.
-   Copyright (C) 2007 Free Software Foundation, Inc.
+   Copyright (C) 2007, 2009, 2011 Free Software Foundation, Inc.
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -16,12 +16,13 @@
 
 #include <config.h>
 
-#include <libpspp/tower.h>
+#include "libpspp/tower.h"
 
 #include <limits.h>
 
-#include <libpspp/assertion.h>
-#include <libpspp/compiler.h>
+#include "libpspp/assertion.h"
+#include "libpspp/cast.h"
+#include "libpspp/compiler.h"
 
 static struct tower_node *abt_to_tower_node (const struct abt_node *);
 static struct tower_node *first_node (const struct tower *);
@@ -32,10 +33,7 @@ static struct tower_node *prev_node (const struct tower *,
                                      const struct tower_node *);
 static unsigned long int get_subtree_size (const struct abt_node *);
 static unsigned long int get_subtree_count (const struct abt_node *);
-static void reaugment_tower_node (struct abt_node *,
-                                  const struct abt_node *,
-                                  const struct abt_node *,
-                                  const void *aux);
+static void reaugment_tower_node (struct abt_node *, const void *aux);
 
 /* Returns the height of the bottom of the given tower NODE.
 
@@ -184,7 +182,7 @@ tower_lookup (const struct tower *t_,
               unsigned long height,
               unsigned long *node_start)
 {
-  struct tower *t = (struct tower *) t_;
+  struct tower *t = CONST_CAST (struct tower *, t_);
   struct abt_node *p;
 
   assert (height < tower_height (t));
@@ -237,7 +235,7 @@ tower_lookup (const struct tower *t_,
 struct tower_node *
 tower_get (const struct tower *t_, unsigned long int index) 
 {
-  struct tower *t = (struct tower *) t_;
+  struct tower *t = CONST_CAST (struct tower *, t_);
   struct abt_node *p;
 
   assert (index < tower_count (t));
@@ -350,27 +348,26 @@ get_subtree_count (const struct abt_node *p)
   return p != NULL ? abt_to_tower_node (p)->subtree_count : 0;
 }
 
-/* Recalculates the subtree_size of NODE based on its LEFT and
-   RIGHT children's subtree_sizes. */
+/* Recalculates the subtree_size of NODE based on the subtree_sizes of its
+   children. */
 static void
-reaugment_tower_node (struct abt_node *node_,
-                      const struct abt_node *left,
-                      const struct abt_node *right,
-                      const void *aux UNUSED)
+reaugment_tower_node (struct abt_node *node_, const void *aux UNUSED)
 {
   struct tower_node *node = abt_to_tower_node (node_);
   node->subtree_size = node->size;
   node->subtree_count = 1;
-  if (left != NULL) 
+
+  if (node->abt_node.down[0] != NULL)
     {
-      struct tower_node *left_node = abt_to_tower_node (left);
-      node->subtree_size += left_node->subtree_size;
-      node->subtree_count += left_node->subtree_count; 
+      struct tower_node *left = abt_to_tower_node (node->abt_node.down[0]);
+      node->subtree_size += left->subtree_size;
+      node->subtree_count += left->subtree_count;
     }
-  if (right != NULL) 
+
+  if (node->abt_node.down[1] != NULL)
     {
-      struct tower_node *right_node = abt_to_tower_node (right);
-      node->subtree_size += right_node->subtree_size;
-      node->subtree_count += right_node->subtree_count; 
+      struct tower_node *right = abt_to_tower_node (node->abt_node.down[1]);
+      node->subtree_size += right->subtree_size;
+      node->subtree_count += right->subtree_count;
     }
 }