X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fmath%2Ftukey-hinges.c;h=22ab45210c38c98066eb4bb654663114cb496ddd;hb=608b1765241e7c6f9bd5e86a8f81cf15edeb413b;hp=95a79c1d30026da280cbc6fa2542518c0ff4ad1f;hpb=57250685f977998fbfcb495f53e61c64026fe43e;p=pspp

diff --git a/src/math/tukey-hinges.c b/src/math/tukey-hinges.c
index 95a79c1d30..22ab45210c 100644
--- a/src/math/tukey-hinges.c
+++ b/src/math/tukey-hinges.c
@@ -1,5 +1,5 @@
 /* PSPP - a program for statistical analysis.
-   Copyright (C) 2008 Free Software Foundation, Inc.
+   Copyright (C) 2008, 2009 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
@@ -20,6 +20,7 @@
 
 #include <gl/xalloc.h>
 #include <libpspp/assertion.h>
+#include <libpspp/cast.h>
 #include <math.h>
 
 void
@@ -59,19 +60,20 @@ tukey_hinges_calculate (const struct tukey_hinges *th, double hinge[3])
 static void
 destroy (struct statistic *s)
 {
-  struct order_stats *os = (struct order_stats *) s;
+  struct tukey_hinges *th = UP_CAST (s, struct tukey_hinges, parent.parent);
+  struct order_stats *os = &th->parent;
 
   free (os->k);
   free (s);
 };
 
-struct statistic *
+struct tukey_hinges *
 tukey_hinges_create (double W, double c_min)
 {
   double d;
   struct tukey_hinges *th = xzalloc (sizeof (*th));
-  struct order_stats *os = (struct order_stats *) th;
-  struct statistic *stat = (struct statistic *) th;
+  struct order_stats *os = &th->parent;
+  struct statistic *stat = &os->parent;
 
   assert (c_min >= 0);
 
@@ -97,5 +99,5 @@ tukey_hinges_create (double W, double c_min)
 
   stat->destroy = destroy;
 
-  return stat;
+  return th;
 }