/* PSPP - a program for statistical analysis.
- Copyright (C) 2008, 2009 Free Software Foundation, Inc.
+ Copyright (C) 2008, 2009, 2011, 2013 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 <data/subcase.h>
+
+#include "data/subcase.h"
+
#include <stdlib.h>
-#include <data/case.h>
-#include <data/variable.h>
-#include <libpspp/assertion.h>
-#include "xalloc.h"
+#include "data/case.h"
+#include "data/variable.h"
+#include "libpspp/assertion.h"
+
+#include "gl/xalloc.h"
static void invalidate_proto (struct subcase *sc);
subcase_init_vars (struct subcase *sc,
const struct variable *const *vars, size_t n_vars)
{
- size_t i;
-
- sc->fields = xnmalloc (n_vars, sizeof *sc->fields);
- sc->n_fields = n_vars;
- sc->proto = NULL;
- for (i = 0; i < n_vars; i++)
- {
- struct subcase_field *field = &sc->fields[i];
- field->case_index = var_get_case_index (vars[i]);
- field->width = var_get_width (vars[i]);
- field->direction = SC_ASCEND;
- }
+ subcase_init_empty (sc);
+ subcase_add_vars_always (sc, vars, n_vars);
}
/* Initializes SC as a subcase with a single field extracted
/* Frees the memory owned by SC (but not SC itself). */
void
-subcase_destroy (struct subcase *sc)
+subcase_uninit (struct subcase *sc)
{
free (sc->fields);
caseproto_unref (sc->proto);
var_get_width (var), direction);
}
+/* Add a field for each of the N_VARS variables in VAR to SC, regardless of
+ whether each variable already has a field in SC. The fields are added with
+ ascending direction. */
+void
+subcase_add_vars_always (struct subcase *sc,
+ const struct variable *const *vars, size_t n_vars)
+{
+ size_t i;
+
+ sc->fields = xnrealloc (sc->fields,
+ sc->n_fields + n_vars, sizeof *sc->fields);
+ for (i = 0; i < n_vars; i++)
+ {
+ struct subcase_field *field = &sc->fields[sc->n_fields++];
+ field->case_index = var_get_case_index (vars[i]);
+ field->width = var_get_width (vars[i]);
+ field->direction = SC_ASCEND;
+ }
+ invalidate_proto (sc);
+}
+
/* Add a field for CASE_INDEX, WIDTH to SC, with DIRECTION as the
sort order, regardless of whether CASE_INDEX already has a
field in SC. */