X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fdata%2Fcasereader.h;h=3df80cb08fb8d38acc302e0654a0217dd666287a;hb=c3ac5a8af9c449072c7e872ca70a78c1755ae309;hp=ffbd17323ffc32274c69ce8c41f7598170a08d16;hpb=085d4563d8d5adfb3a2552d6ab1959c3fcacaee0;p=pspp-builds.git

diff --git a/src/data/casereader.h b/src/data/casereader.h
index ffbd1732..3df80cb0 100644
--- a/src/data/casereader.h
+++ b/src/data/casereader.h
@@ -113,8 +113,33 @@ casereader_create_translator (struct casereader *, size_t output_value_cnt,
                               bool (*destroy) (void *aux),
                               void *aux);
 
+/* A function which creates a numberic value from an existing case */
+typedef double new_value_func (const struct ccase *, casenumber, void *);
+
+struct casereader *
+casereader_create_append_numeric (struct casereader *subreader,
+				  new_value_func func, void *aux,
+				  void (*destroy) (void *aux));
+
 struct casereader *
 casereader_create_arithmetic_sequence (struct casereader *,
                                        double first, double increment);
 
+enum rank_error
+  {
+    RANK_ERR_NONE = 0,
+    RANK_ERR_NEGATIVE_WEIGHT = 0x01,
+    RANK_ERR_UNSORTED = 0x02
+  };
+
+
+typedef void distinct_func (double v, casenumber n, double w, void *aux);
+
+struct casereader *
+casereader_create_append_rank (struct casereader *,
+			       const struct variable *v, const struct variable *w,
+			       enum rank_error *err,
+			       distinct_func *distinct_callback, void *aux);
+
+
 #endif /* data/casereader.h */