/* PSPP - a program for statistical analysis.
- Copyright (C) 2008 Free Software Foundation, Inc.
+ Copyright (C) 2008, 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
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
-#include "percentiles.h"
-#include <math/order-stats.h>
+#include "math/percentiles.h"
+
+#include "data/casereader.h"
+#include "data/val-type.h"
+#include "data/variable.h"
+#include "libpspp/assertion.h"
+#include "libpspp/cast.h"
+#include "math/order-stats.h"
+
+#include "gl/xalloc.h"
#include "gettext.h"
#define _(msgid) gettext (msgid)
#define N_(msgid) msgid
-#include <libpspp/assertion.h>
-#include <data/val-type.h>
-#include <gl/xalloc.h>
-#include <data/variable.h>
-#include <data/casereader.h>
-
-
const char *const ptile_alg_desc[] = {
"",
N_("HAverage"),
double
percentile_calculate (const struct percentile *ptl, enum pc_alg alg)
{
- struct percentile *mutable = (struct percentile *) ptl;
+ struct percentile *mutable = CONST_CAST (struct percentile *, ptl);
const struct order_stats *os = &ptl->parent;
assert (os->cc == ptl->w);
static void
destroy (struct statistic *stat)
{
- struct order_stats *os = (struct order_stats *) stat;
+ struct percentile *ptl = UP_CAST (stat, struct percentile, parent.parent);
+ struct order_stats *os = &ptl->parent;
free (os->k);
- free (os);
+ free (ptl);
}
-struct order_stats *
+struct percentile *
percentile_create (double p, double W)
{
struct percentile *ptl = xzalloc (sizeof (*ptl));
- struct order_stats *os = (struct order_stats *) ptl;
- struct statistic *stat = (struct statistic *) ptl;
+ struct order_stats *os = &ptl->parent;
+ struct statistic *stat = &os->parent;
assert (p >= 0);
assert (p <= 1.0);
ptl->w = W;
os->n_k = 2;
- os->k = xcalloc (sizeof (*os->k), 2);
+ os->k = xcalloc (2, sizeof (*os->k));
os->k[0].tc = W * p;
os->k[1].tc = (W + 1.0) * p;
stat->destroy = destroy;
- return os;
+ return ptl;
}