casereader: Make parameter to casereader_count_cases const.

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

diff --git a/src/data/casereader.h b/src/data/casereader.h
index c26657cf5d49a62d7870d0337117c2bfaf8a99d2..f2231e2d88984576e39e712427d3dfa4e530f889 100644 (file)
--- a/src/data/casereader.h
+++ b/src/data/casereader.h
@@ -58,6 +58,7 @@
 struct dictionary;
 struct casereader;
 struct casewriter;
+struct subcase;
 
 struct ccase *casereader_read (struct casereader *);
 bool casereader_destroy (struct casereader *);
@@ -76,7 +77,7 @@ void casereader_force_error (struct casereader *);
 const struct taint *casereader_get_taint (const struct casereader *);
 
 casenumber casereader_get_case_cnt (struct casereader *);
-casenumber casereader_count_cases (struct casereader *);
+casenumber casereader_count_cases (const struct casereader *);
 void casereader_truncate (struct casereader *, casenumber);
 const struct caseproto *casereader_get_proto (const struct casereader *);
 
@@ -125,6 +126,13 @@ casereader_translate_stateless (struct casereader *,
                                 bool (*destroy) (void *aux),
                                 void *aux);
 
+struct casereader *casereader_project (struct casereader *,
+                                       const struct subcase *);
+struct casereader *casereader_project_1 (struct casereader *, int column);
+struct casereader *casereader_select (struct casereader *,
+                                      casenumber first, casenumber last,
+                                      casenumber by);
+
 /* A function which creates a numberic value from an existing case */
 typedef double new_value_func (const struct ccase *, casenumber, void *);