X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fdata%2Fmissing-values.h;h=ec5a843e6452ba3b79e246b7dbdd38cd17c21a2d;hb=95cde62bdf5210c1c60dad5598a888b864f93161;hp=9d9a884d08a798e57473061016e38be35a2d112b;hpb=a12aeb43c5edf27b0ef2be5c2d7db30214a31a2b;p=pspp

diff --git a/src/data/missing-values.h b/src/data/missing-values.h
index 9d9a884d08..ec5a843e64 100644
--- a/src/data/missing-values.h
+++ b/src/data/missing-values.h
@@ -51,24 +51,28 @@ struct missing_values
     union value values[3];      /* Missing values.  [1], [2] are the range. */
   };
 
-/* Classes of missing values. */
+#define MV_INIT_EMPTY_NUMERIC { .type = 0 }
+
+/* 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);