Add Compare to LogID and merkletree.Hash

cttypes/logid.go

@@ -10,6 +10,7 @@
 package cttypes
 
 import (
+	"bytes"
 	"encoding/base64"
 	"fmt"
 	"golang.org/x/crypto/cryptobyte"
@@ -17,6 +18,10 @@ import (
 
 type LogID [32]byte
 
+func (id LogID) Compare(other LogID) int {
+	return bytes.Compare(id[:], other[:])
+}
+
 func (v *LogID) Unmarshal(s *cryptobyte.String) bool {
 	return s.CopyBytes((*v)[:])
 }

merkletree/hash.go

@@ -10,6 +10,7 @@
 package merkletree
 
 import (
+	"bytes"
 	"crypto/sha256"
 	"encoding/base64"
 	"encoding/json"
@@ -20,6 +21,10 @@ const HashLen = 32
 
 type Hash [HashLen]byte
 
+func (h Hash) Compare(other Hash) int {
+	return bytes.Compare(h[:], other[:])
+}
+
 func (h Hash) Base64String() string {
 	return base64.StdEncoding.EncodeToString(h[:])
 }