Added new files resulting from directory restructuring.

[pspp-builds.git] / src / math / group.c

diff --git a/src/math/group.c b/src/math/group.c
new file mode 100644 (file)
index 0000000..58d5c92
--- /dev/null
+++ b/src/math/group.c
@@ -0,0 +1,68 @@
+/* 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., 51 Franklin Street, Fifth Floor, Boston, MA
+   02110-1301, USA. */
+
+#include <config.h>
+#include <stdlib.h>
+#include "alloc.h"
+#include "hash.h"
+#include "group.h"
+#include "group-proc.h"
+#include "str.h"
+#include "variable.h"
+#include "misc.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)
+{
+  return compare_values(&a->id, &b->id, width);
+}
+
+
+
+unsigned 
+hash_group(const struct group_statistics *g, int width)
+{
+  unsigned id_hash;
+
+  id_hash = hash_value(&g->id, width);
+
+  return id_hash;
+}
+
+
+void  
+free_group(struct group_statistics *v, void *aux UNUSED)
+{
+  free(v);
+}
+
+
+struct group_proc *
+group_proc_get (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;
+}