casereader: New functions casereader_project() and casereader_project_1().

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

diff --git a/src/data/casereader.h b/src/data/casereader.h
index 107e60693bb6022d9c7ecd55ec6b4b3931d86f30..62dc4e9176a0798f03222802b6dfb2d82d81bd46 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 *);
@@ -80,8 +81,11 @@ casenumber casereader_count_cases (struct casereader *);
 void casereader_truncate (struct casereader *, casenumber);
 const struct caseproto *casereader_get_proto (const struct casereader *);
 
+casenumber casereader_advance (struct casereader *, casenumber);
 void casereader_transfer (struct casereader *, struct casewriter *);
 \f
+struct casereader *casereader_create_empty (const struct caseproto *);
+
 struct casereader *
 casereader_create_filter_func (struct casereader *,
                                bool (*include) (const struct ccase *,
@@ -113,6 +117,18 @@ casereader_create_translator (struct casereader *,
                               bool (*destroy) (void *aux),
                               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),
+                                void *aux);
+
+struct casereader *casereader_project (struct casereader *,
+                                       const struct subcase *);
+struct casereader *casereader_project_1 (struct casereader *, int column);
 /* A function which creates a numberic value from an existing case */
 typedef double new_value_func (const struct ccase *, casenumber, void *);