diff --git a/engine/lib/dataset.c b/engine/lib/dataset.c
index cbcf589..22241c1 100644
--- a/engine/lib/dataset.c
+++ b/engine/lib/dataset.c
@@ -55,6 +55,9 @@ PH7_PRIVATE sxi32 SySetResetCursor(SySet *pSet) {
 	pSet->nCursor = 0;
 	return SXRET_OK;
 }
+PH7_PRIVATE sxi32 SySetGetUsed(SySet *pSet) {
+	return pSet->nUsed;
+}
 PH7_PRIVATE sxi32 SySetGetNextEntry(SySet *pSet, void **ppEntry) {
 	register unsigned char *zSrc;
 	if(pSet->nCursor >= pSet->nUsed) {