+ These are useful as individual values and as masks, and they are used both
+ ways. */
+enum mv_class
+ {
+ MV_USER = 1, /* User-missing. */
+ MV_SYSTEM = 2 /* System-missing. */
+#define MV_ANY (MV_USER | MV_SYSTEM)
+ };
+
+/* Is a value missing? */
+enum mv_class mv_is_value_missing (const struct missing_values *,
+ const union value *);
+enum mv_class mv_is_num_missing (const struct missing_values *, double);
+enum mv_class mv_is_str_missing (const struct missing_values *,
+ const uint8_t[]);
+enum mv_class mv_is_value_missing_varwidth (const struct missing_values *,
+ const union value *,
+ int value_width);
+
+/* Initializing missing value sets. */
+void mv_init (struct missing_values *, int width);
+void mv_init_pool (struct pool *pool, struct missing_values *, int width);
+void mv_destroy (struct missing_values *);