+/* PSPP - computes sample statistics.
+ 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 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., 59 Temple Place - Suite 330, Boston, MA
+ 02111-1307, USA. */
+
+#include "hash.h"
+#include "group.h"
+#include <string.h>
+
+
+/* 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 width)
+{
+ int id_cmp = compare_values(&a->id, &b->id, width);
+
+ if (id_cmp == 0 )
+ {
+ int c;
+ c= memcmp(&a->criterion,&b->criterion,sizeof(enum comparison));
+ return c;
+ }
+ else
+ return id_cmp;
+}
+
+
+unsigned
+hash_group(const struct group_statistics *g, int width)
+{
+ unsigned id_hash;
+
+ if ( 0 == width )
+ id_hash = hsh_hash_double (g->id.f);
+ else
+ id_hash = hsh_hash_bytes (g->id.s, width);
+
+ return id_hash;
+}
+
+
+void
+free_group(struct group_statistics *v, void *aux)
+{
+ free(v);
+}