1 files changed, 30 insertions, 0 deletions
diff --git a/src/hub/src/spreadspace.org/sfive/s5typesStore.go b/src/hub/src/spreadspace.org/sfive/s5typesStore.go
index 67d38d1..b046ce9 100644
--- a/src/hub/src/spreadspace.org/sfive/s5typesStore.go
+++ b/src/hub/src/spreadspace.org/sfive/s5typesStore.go
@@ -207,3 +207,33 @@ func itob(v int64) []byte {
 func btoi(b []byte) int64 {
 	return int64(binary.BigEndian.Uint64(b))
 }
+
+type idList []int64
+
+func idListFromBytes(data []byte) (ids idList, err error) {
+	l := len(data)
+	if l%8 != 0 {
+		err = errors.New("length of data must be multiples of 8")
+		return
+	}
+	for i := 0; i < l; i += 8 {
+		ids = append(ids, int64(binary.BigEndian.Uint64(data[i:i+8])))
+	}
+	return
+}
+
+func (ids idList) toBytes() (data []byte) {
+	l := len(ids)
+	data = make([]byte, 8*l)
+	for i, d := 0, 0; i < l; i, d = i+1, d+8 {
+		binary.BigEndian.PutUint64(data[d:d+8], uint64(ids[i]))
+	}
+	return
+}
+
+func appendToBinaryIDList(b []byte, id int64) []byte {
+	l := len(b)
+	b = append(b, make([]byte, 8)...)
+	binary.BigEndian.PutUint64(b[l:l+8], uint64(id))
+	return b
+}