Hulk did something

[bytom/vapor.git] / common / sort.go

diff --git a/common/sort.go b/common/sort.go
new file mode 100644 (file)
index 0000000..a476c92
--- /dev/null
+++ b/common/sort.go
@@ -0,0 +1,23 @@
+package common
+
+// timeSorter implements sort.Interface to allow a slice of timestamps to
+// be sorted.
+type TimeSorter []uint64
+
+// Len returns the number of timestamps in the slice.  It is part of the
+// sort.Interface implementation.
+func (s TimeSorter) Len() int {
+       return len(s)
+}
+
+// Swap swaps the timestamps at the passed indices.  It is part of the
+// sort.Interface implementation.
+func (s TimeSorter) Swap(i, j int) {
+       s[i], s[j] = s[j], s[i]
+}
+
+// Less returns whether the timstamp with index i should sort before the
+// timestamp with index j.  It is part of the sort.Interface implementation.
+func (s TimeSorter) Less(i, j int) bool {
+       return s[i] < s[j]
+}