X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fmath%2Ftrimmed-mean.c;h=d1cc6b708279098ab8d263b95923d9b31c968ed6;hb=cc2f230e7056734a2f7db67fbf9646a549496021;hp=da3d4240e5b232533de6c5c31073b53adda49f48;hpb=015e221b0f8578afee769528572c76387f26c629;p=pspp-builds.git

diff --git a/src/math/trimmed-mean.c b/src/math/trimmed-mean.c
index da3d4240..d1cc6b70 100644
--- a/src/math/trimmed-mean.c
+++ b/src/math/trimmed-mean.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>
 #include <data/val-type.h>
 
@@ -27,8 +28,8 @@
 static void
 acc (struct statistic *s, const struct ccase *cx UNUSED, double c, double cc, double y)
 {
-  struct trimmed_mean *tm = (struct trimmed_mean *) s;
-  struct order_stats *os = (struct order_stats *) s;
+  struct trimmed_mean *tm = UP_CAST (s, struct trimmed_mean, parent.parent);
+  struct order_stats *os = &tm->parent;
 
   if ( cc > os->k[0].tc && cc < os->k[1].tc)
       tm->sum += c * y;
@@ -40,17 +41,18 @@ acc (struct statistic *s, const struct ccase *cx UNUSED, double c, double cc, do
 static void
 destroy (struct statistic *s)
 {
-  struct order_stats *os = (struct order_stats *) s;
+  struct trimmed_mean *tm = UP_CAST (s, struct trimmed_mean, parent.parent);
+  struct order_stats *os = &tm->parent;
   free (os->k);
-  free (s);
+  free (tm);
 }
 
-struct statistic *
+struct trimmed_mean *
 trimmed_mean_create (double W, double tail)
 {
   struct trimmed_mean *tm = xzalloc (sizeof (*tm));
-  struct order_stats *os = (struct order_stats *) tm;
-  struct statistic *stat = (struct statistic *) tm;
+  struct order_stats *os = &tm->parent;
+  struct statistic *stat = &os->parent;
 
   os->n_k = 2;
   os->k = xcalloc (sizeof (*os->k), 2);
@@ -68,7 +70,7 @@ trimmed_mean_create (double W, double tail)
   tm->w = W;
   tm->tail = tail;
 
-  return stat;
+  return tm;
 }