Certificate Transparency: Start tracking logs' state

net/cert/signed_tree_head.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/cert/signed_tree_head.h"
 
 #include <string.h>
 
 #include <ostream>
 
@@ skipping 15 matching lines @@
       tree_size(tree_size),
       signature(signature),
       log_id(log_id) {
   memcpy(this->sha256_root_hash, sha256_root_hash, kSthRootHashLength);
 }
 
 SignedTreeHead::SignedTreeHead(const SignedTreeHead& other) = default;
 
 SignedTreeHead::~SignedTreeHead() {}
 
+bool operator==(const SignedTreeHead& sth1, const SignedTreeHead& sth2) {
+  return sth1.log_id == sth2.log_id && sth1.timestamp == sth2.timestamp;
+}
+
+bool operator!=(const SignedTreeHead& sth1, const SignedTreeHead& sth2) {
+  return !(sth1 == sth2);
+}
+
 void PrintTo(const SignedTreeHead& sth, std::ostream* os) {
   (*os) << "{\n"
         << "\t\"version\": " << sth.version << ",\n"
         << "\t\"timestamp\": " << sth.timestamp << ",\n"
         << "\t\"tree_size\": " << sth.tree_size << ",\n"
         << "\t\"sha256_root_hash\": \""
         << base::HexEncode(sth.sha256_root_hash, kSthRootHashLength)
         << "\",\n\t\"log_id\": \""
         << base::HexEncode(sth.log_id.data(), sth.log_id.size()) << "\"\n"
         << "}";
 }
 
 }  // namespace ct
 }  // namespace net