X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fmath%2Fnp.c;h=b631820903e6ebf4e41a536ebe7ea964924af918;hb=fb763770be9335ecdda998155febc58b795c7bfe;hp=e61bf58e117aaf915d596bc26b8875152f0f0deb;hpb=5c3291dc396b795696e94f47780308fd7ace6fc4;p=pspp

diff --git a/src/math/np.c b/src/math/np.c
index e61bf58e11..b631820903 100644
--- a/src/math/np.c
+++ b/src/math/np.c
@@ -24,6 +24,7 @@
 #include <data/case.h>
 #include <data/casewriter.h>
 #include <libpspp/compiler.h>
+#include <libpspp/cast.h>
 #include <libpspp/misc.h>
 #include <math/moments.h>
 
@@ -32,8 +33,8 @@
 static void
 destroy (struct statistic *stat)
 {
-  struct order_stats *os = (struct order_stats *) stat;
-  free (os);
+  struct np *np = UP_CAST (stat, struct np, parent.parent);
+  free (np);
 }
 
 
@@ -42,7 +43,7 @@ acc (struct statistic *s, const struct ccase *cx UNUSED,
      double c, double cc, double y)
 {
   struct ccase *cp;
-  struct np *np = (struct np *) s;
+  struct np *np = UP_CAST (s, struct np, parent.parent);
   double rank = np->prev_cc + (c + 1) / 2.0;
 
   double ns = gsl_cdf_ugaussian_Pinv (rank / ( np->n + 1 ));
@@ -69,13 +70,13 @@ acc (struct statistic *s, const struct ccase *cx UNUSED,
   np->prev_cc = cc;
 }
 
-struct order_stats *
+struct np *
 np_create (const struct moments1 *m)
 {
   double variance;
   struct np *np = xzalloc (sizeof (*np));
-  struct statistic *stat = (struct statistic *) np;
-  struct order_stats *os = (struct order_stats *) np;
+  struct order_stats *os = &np->parent;
+  struct statistic *stat = &os->parent;
   struct caseproto *proto;
   int i;
 
@@ -98,5 +99,5 @@ np_create (const struct moments1 *m)
   stat->destroy = destroy;
   stat->accumulate = acc;
 
-  return os;
+  return np;
 }