#include <libpspp/misc.h>
#include <stdbool.h>
+#include <stddef.h>
#include "minmax.h"
/* "Short" strings, which are generally those no more than 8
union value *value_create (int width);
int compare_values (const union value *, const union value *, int width);
-unsigned hash_value (const union value *, int width);
+unsigned hash_value (const union value *, int width);
+
+int compare_ptr_values (const union value **, const union value **, int width);
+unsigned hash_ptr_value (const union value **, int width);
+
static inline size_t value_cnt_from_width (int width);
void value_copy (union value *, const union value *, int width);