Add Inner Ring code

pkg/core/netmap/epoch/relation.go

@@ -0,0 +1,55 @@
+package epoch
+
+// EQ reports whether e and e2 are the same Epoch.
+//
+// Function defines the relation of equality
+// between two Epoch. Try to avoid comparison through
+// "==" operator for better portability.
+func EQ(e1, e2 Epoch) bool {
+	return ToUint64(e1) == ToUint64(e2)
+}
+
+// NE reports whether e1 and e2 are the different Epoch.
+//
+// Method defines the relation of inequality
+// between two Epoch. Try to avoid comparison through
+// "!=" operator for better portability.
+func NE(e1, e2 Epoch) bool {
+	return ToUint64(e1) != ToUint64(e2)
+}
+
+// LT reports whether e1 is less Epoch than e2.
+//
+// Method defines the "less than" relation
+// between two Epoch. Try to avoid comparison through
+// "<" operator for better portability.
+func LT(e1, e2 Epoch) bool {
+	return ToUint64(e1) < ToUint64(e2)
+}
+
+// GT reports whether e1 is greater Epoch than e2.
+//
+// Method defines the "greater than" relation
+// between two Epoch. Try to avoid comparison through
+// ">" operator for better portability.
+func GT(e1, e2 Epoch) bool {
+	return ToUint64(e1) > ToUint64(e2)
+}
+
+// LE reports whether e1 is less or equal Epoch than e2.
+//
+// Method defines the "less or equal" relation
+// between two Epoch. Try to avoid comparison through
+// "<=" operator for better portability.
+func LE(e1, e2 Epoch) bool {
+	return ToUint64(e1) <= ToUint64(e2)
+}
+
+// GE reports whether e1 is greater or equal Epoch than e2.
+//
+// Method defines the "greater or equal" relation
+// between two Epoch. Try to avoid comparison through
+// ">=" operator for better portability.
+func GE(e1, e2 Epoch) bool {
+	return ToUint64(e1) >= ToUint64(e2)
+}