casereader: New function casereader_truncate().

[pspp-builds.git] / src / data / casereader.h

diff --git a/src/data/casereader.h b/src/data/casereader.h
index d4f2966a5e7a18be9395f253445fa4fa82ff2beb..107e60693bb6022d9c7ecd55ec6b4b3931d86f30 100644 (file)
--- a/src/data/casereader.h
+++ b/src/data/casereader.h
@@ -77,6 +77,7 @@ const struct taint *casereader_get_taint (const struct casereader *);
 
 casenumber casereader_get_case_cnt (struct casereader *);
 casenumber casereader_count_cases (struct casereader *);
+void casereader_truncate (struct casereader *, casenumber);
 const struct caseproto *casereader_get_proto (const struct casereader *);
 
 void casereader_transfer (struct casereader *, struct casewriter *);
@@ -140,5 +141,10 @@ casereader_create_append_rank (struct casereader *,
                               enum rank_error *err,
                               distinct_func *distinct_callback, void *aux);
 
+struct casereader *
+casereader_create_distinct (struct casereader *input,
+                           const struct variable *key,
+                           const struct variable *weight);
+
 
 #endif /* data/casereader.h */