X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fdata%2Fcasereader.h;h=06f7a7b13a2cf872644cc9b8fc62d23c291ad3d1;hb=6fe157aa60e9eff822de37cfe1c181a942deda70;hp=680e669928331a6ffccea5f72c4392e499f3b825;hpb=339f1956cc727eda788638644ef93ab7852b31cd;p=pspp

diff --git a/src/data/casereader.h b/src/data/casereader.h
index 680e669928..06f7a7b13a 100644
--- a/src/data/casereader.h
+++ b/src/data/casereader.h
@@ -67,8 +67,8 @@ struct casereader *casereader_clone (const struct casereader *);
 struct casereader *casereader_rename (struct casereader *);
 void casereader_swap (struct casereader *, struct casereader *);
 
-struct ccase *casereader_peek (struct casereader *, casenumber);
-bool casereader_is_empty (struct casereader *);
+struct ccase *casereader_peek (const struct casereader *, casenumber);
+bool casereader_is_empty (const struct casereader *);
 
 bool casereader_error (const struct casereader *);
 void casereader_force_error (struct casereader *);
@@ -107,21 +107,20 @@ struct casereader *
 casereader_create_counter (struct casereader *, casenumber *counter,
                            casenumber initial_value);
 
+struct casereader_translator_class
+  {
+    struct ccase *(*translate) (struct ccase *, void *aux);
+    bool (*destroy) (void *aux);
+  };
 struct casereader *
 casereader_create_translator (struct casereader *,
                               const struct caseproto *output_proto,
-                              struct ccase *(*translate) (struct ccase *,
-                                                          void *aux),
-                              bool (*destroy) (void *aux),
+                              const struct casereader_translator_class *,
                               void *aux);
-
 struct casereader *
 casereader_translate_stateless (struct casereader *,
                                 const struct caseproto *output_proto,
-                                struct ccase *(*translate) (struct ccase *,
-                                                            casenumber idx,
-                                                            const void *aux),
-                                bool (*destroy) (void *aux),
+                                const struct casereader_translator_class *,
                                 void *aux);
 
 struct casereader *casereader_project (struct casereader *,