-/* PSPP - Creates data structures to store interactions for
- statistical routines.
+/* PSPP - a program for statistical analysis.
+ Copyright (C) 2009 Free Software Foundation, Inc.
- Copyright (C) 2007 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
+ the Free Software Foundation, either version 3 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 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.
+ 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. */
-gsl_vector *
-get_interaction (union value **, const struct variable **, size_t);
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#ifndef INTERACTION_H
+#define INTERACTION_H
+#include <data/case.h>
+
+struct interaction_variable;
+struct interaction_value;
+
+struct interaction_variable * interaction_variable_create (const struct variable **, int);
+void interaction_variable_destroy (struct interaction_variable *);
+struct interaction_value * interaction_value_create (const struct interaction_variable *, const union value **);
+void interaction_value_destroy (struct interaction_value *);
+size_t interaction_variable_get_n_vars (const struct interaction_variable *);
+double interaction_value_get_nonzero_entry (const struct interaction_value *);
+const union value *interaction_value_get (const struct interaction_value *);
+const struct variable * interaction_get_variable (const struct interaction_variable *);
+size_t interaction_get_n_numeric (const struct interaction_variable *);
+size_t interaction_get_n_alpha (const struct interaction_variable *);
+size_t interaction_get_n_vars (const struct interaction_variable *);
+const struct variable * interaction_get_member (const struct interaction_variable *, size_t);
+bool is_interaction (const struct variable *, const struct interaction_variable **, size_t);
+struct interaction_value *
+interaction_case_data (const struct ccase *, const struct interaction_variable *);
+double interaction_value_get_nonzero_entry (const struct interaction_value *);
+#endif