X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fmath%2Fgroup.c;h=154e6f882ffd7341693a6590a3932eb990b111ce;hb=2c7d1b0285e21571b1e50def87e33095f095ce4e;hp=c3dcbaadda5f8c8eccfd307294e782d1f2a9f65c;hpb=a19b858e0ac3c69e4a28c0ca6d8674427268a863;p=pspp

diff --git a/src/math/group.c b/src/math/group.c
index c3dcbaadda..154e6f882f 100644
--- a/src/math/group.c
+++ b/src/math/group.c
@@ -1,21 +1,18 @@
-/* PSPP - computes sample statistics.
+/* PSPP - a program for statistical analysis.
    Copyright (C) 1997-9, 2000 Free Software Foundation, Inc.
-   Written by John Darrington <john@darrington.wattle.id.au>
 
-   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 the Free Software Foundation; either version 2 of the
-   License, or (at your option) any later version.
+   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
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
 
-   This program is distributed in the hope that it will be useful, but
-   WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   General Public License for more details.
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-   02110-1301, USA. */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>. */
 
 #include <config.h>
 #include <stdlib.h>
@@ -29,11 +26,11 @@
 #include <libpspp/misc.h>
 
 
-/* Return -1 if the id of a is less than b; +1 if greater than and 
+/* Return -1 if the id of a is less than b; +1 if greater than and
    0 if equal */
-int 
-compare_group(const struct group_statistics *a, 
-		 const struct group_statistics *b, 
+int
+compare_group(const struct group_statistics *a,
+		 const struct group_statistics *b,
 		 int width)
 {
   return compare_values(&a->id, &b->id, width);
@@ -41,7 +38,7 @@ compare_group(const struct group_statistics *a,
 
 
 
-unsigned 
+unsigned
 hash_group(const struct group_statistics *g, int width)
 {
   unsigned id_hash;
@@ -52,7 +49,7 @@ hash_group(const struct group_statistics *g, int width)
 }
 
 
-void  
+void
 free_group(struct group_statistics *v, void *aux UNUSED)
 {
   free(v);
@@ -60,10 +57,14 @@ free_group(struct group_statistics *v, void *aux UNUSED)
 
 
 struct group_proc *
-group_proc_get (struct variable *v)
+group_proc_get (const struct variable *v)
 {
   /* This is not ideal, obviously. */
-  if (v->aux == NULL) 
-    var_attach_aux (v, xmalloc (sizeof (struct group_proc)), var_dtor_free);
-  return v->aux;
+  struct group_proc *group = var_get_aux (v);
+  if (group == NULL)
+    {
+      group = xmalloc (sizeof (struct group_proc));
+      var_attach_aux (v, group, var_dtor_free);
+    }
+  return group;
 }