variable: Introduce and use new function var_get_encoding().

[pspp] / src / data / variable.c

diff --git a/src/data/variable.c b/src/data/variable.c
index d1e308640d05268df79f8639848cef04c618ba23..79925fa8cbfb00dd4c47c66e085fab1a12162fb3 100644 (file)
--- a/src/data/variable.c
+++ b/src/data/variable.c
@@ -590,10 +590,9 @@ var_append_value_name (const struct variable *v, const union value *value,
                       struct string *str)
 {
   const char *name = var_lookup_value_label (v, value);
-  const struct dictionary *dict = var_get_vardict (v)->dict;
   if (name == NULL)
     {
-      char *s = data_out (value, dict_get_encoding (dict), &v->print);
+      char *s = data_out (value, var_get_encoding (v), &v->print);
       ds_put_cstr (str, s);
       free (s);
     }
@@ -957,7 +956,7 @@ void *
 var_attach_aux (const struct variable *v_,
                 void *aux, void (*aux_dtor) (struct variable *))
 {
-  struct variable *v = (struct variable *) v_ ; /* cast away const  */
+  struct variable *v = CONST_CAST (struct variable *, v_);
   assert (v->aux == NULL);
   assert (aux != NULL);
   v->aux = aux;
@@ -1015,7 +1014,7 @@ var_get_obs_vals (const struct variable *v)
 void
 var_set_obs_vals (const struct variable *v_, struct cat_vals *cat_vals)
 {
-  struct variable *v = (struct variable *) v_ ; /* cast away const */
+  struct variable *v = CONST_CAST (struct variable *, v_ );
   cat_stored_values_destroy (v->obs_vals);
   v->obs_vals = cat_vals;
 }
@@ -1035,7 +1034,7 @@ var_has_obs_vals (const struct variable *v)
 struct attrset *
 var_get_attributes (const struct variable *v) 
 {
-  return (struct attrset *) &v->attributes;
+  return CONST_CAST (struct attrset *, &v->attributes);
 }
 
 /* Replaces variable V's attributes set by a copy of ATTRS. */
@@ -1053,6 +1052,15 @@ var_has_attributes (const struct variable *v)
   return attrset_count (&v->attributes) > 0;
 }
 \f
+/* Returns the encoding of values of variable VAR.  (This is actually a
+   property of the dictionary.)  Returns null if no specific encoding has been
+   set.  */
+const char *
+var_get_encoding (const struct variable *var)
+{
+  return var_has_vardict (var) ? dict_get_encoding (var->vardict.dict) : NULL;
+}
+\f
 /* Returns V's vardict structure. */
 const struct vardict_info *
 var_get_vardict (const struct variable *v)