sort: Add support for combining cases with identical sort criteria.

[pspp] / src / data / subcase.h

diff --git a/src/data/subcase.h b/src/data/subcase.h
index 71bf6fd7cc33d4227a4e3c4380f6773a1bfc599a..f890f2549afa8e8138ace3f92f88300613e2feee 100644 (file)
--- a/src/data/subcase.h
+++ b/src/data/subcase.h
@@ -72,6 +72,8 @@ void subcase_add_always (struct subcase *sc, int case_index, int width,
                          enum subcase_direction direction);
 void subcase_add_var_always (struct subcase *, const struct variable *,
                              enum subcase_direction);
+void subcase_add_vars_always (struct subcase *,
+                              const struct variable *const *, size_t n_vars);
 void subcase_add_proto_always (struct subcase *, const struct caseproto *);
 
 const struct caseproto *subcase_get_proto (const struct subcase *);