union value values[3]; /* Missing values. [1], [2] are the range. */
};
-/* Classes of missing values. */
+/* Classes of missing values.
+
+ These are useful as individual values and as masks, and they are used both
+ ways. */
enum mv_class
{
- MV_NEVER = 0, /* Never considered missing. */
- MV_USER = 1, /* Missing if value is user-missing. */
- MV_SYSTEM = 2, /* Missing if value is system-missing. */
- MV_ANY = MV_USER | MV_SYSTEM /* Missing if it is user or system-missing. */
+ MV_USER = 1, /* User-missing. */
+ MV_SYSTEM = 2 /* System-missing. */
+#define MV_ANY (MV_USER | MV_SYSTEM)
};
/* Is a value missing? */
-bool mv_is_value_missing (const struct missing_values *, const union value *,
- enum mv_class);
-bool mv_is_num_missing (const struct missing_values *, double, enum mv_class);
-bool mv_is_str_missing (const struct missing_values *, const uint8_t[],
- enum mv_class);
-bool mv_is_value_missing_varwidth (const struct missing_values *,
- const union value *, int value_width,
- enum mv_class);
+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);