/* PSPP - binary encodings for categorical variables.
Copyright (C) 2005 Free Software Foundation, Inc.
- Written by Jason H Stover <jason@sakla.net>.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
*/
#include <config.h>
-#include "category.h"
-
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <libpspp/alloc.h>
#include <libpspp/message.h>
-#include "cat-routines.h"
+#include "category.h"
#include "value.h"
#include "variable.h"
+#define CAT_VALUE_NOT_FOUND -2
+
#define N_INITIAL_CATEGORIES 1
+/*
+ This structure contains the observed values of a
+ categorical variable.
+ */
+struct cat_vals
+{
+ union value *vals;
+ size_t n_categories;
+ size_t n_allocated_categories; /* This is used only during
+ initialization to keep
+ track of the number of
+ values stored.
+ */
+};
+
void
cat_stored_values_create (const struct variable *v)
{
if (!var_has_obs_vals (v))
{
struct cat_vals *obs_vals = xmalloc (sizeof *obs_vals);
+
obs_vals->n_categories = 0;
obs_vals->n_allocated_categories = N_INITIAL_CATEGORIES;
obs_vals->vals = xnmalloc (N_INITIAL_CATEGORIES, sizeof *obs_vals->vals);
void
cat_stored_values_destroy (struct cat_vals *obs_vals)
{
- if (obs_vals != NULL)
+ if (obs_vals != NULL)
{
if (obs_vals->n_allocated_categories > 0)
free (obs_vals->vals);
}
}
-union value *
-cat_subscript_to_value (const size_t s, struct variable *v)
+const union value *
+cat_subscript_to_value (const size_t s, const struct variable *v)
{
struct cat_vals *obs_vals = var_get_obs_vals (v);
return s < obs_vals->n_categories ? obs_vals->vals + s : NULL;