1
2 /**
3 * Copyright (C) 2018-present MongoDB, Inc.
4 *
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the Server Side Public License, version 1,
7 * as published by MongoDB, Inc.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * Server Side Public License for more details.
13 *
14 * You should have received a copy of the Server Side Public License
15 * along with this program. If not, see
16 * <http://www.mongodb.com/licensing/server-side-public-license>.
17 *
18 * As a special exception, the copyright holders give permission to link the
19 * code of portions of this program with the OpenSSL library under certain
20 * conditions as described in each individual source file and distribute
21 * linked combinations including the program with the OpenSSL library. You
22 * must comply with the Server Side Public License in all respects for
23 * all of the code used other than as permitted herein. If you modify file(s)
24 * with this exception, you may extend this exception to your version of the
25 * file(s), but you are not obligated to do so. If you do not wish to do so,
26 * delete this exception statement from your version. If you delete this
27 * exception statement from all source files in the program, then also delete
28 * it in the license file.
29 */
30
31 #include "mongo/bson/timestamp.h"
32 #include "mongo/bson/bsontypes.h"
33
34 #include <cstdint>
35 #include <ctime>
36 #include <iostream>
37 #include <limits>
38 #include <sstream>
39
40 #include "mongo/bson/bsonobjbuilder.h"
41 #include "mongo/util/time_support.h"
42
43 namespace mongo {
44
45 const Timestamp Timestamp::kAllowUnstableCheckpointsSentinel = Timestamp(0, 1);
46
max()47 Timestamp Timestamp::max() {
48 unsigned int t = static_cast<unsigned int>(std::numeric_limits<uint32_t>::max());
49 unsigned int i = std::numeric_limits<uint32_t>::max();
50 return Timestamp(t, i);
51 }
52
append(BufBuilder & builder,const StringData & fieldName) const53 void Timestamp::append(BufBuilder& builder, const StringData& fieldName) const {
54 // No endian conversions needed, since we store in-memory representation
55 // in little endian format, regardless of target endian.
56 builder.appendNum(static_cast<char>(bsonTimestamp));
57 builder.appendStr(fieldName);
58 builder.appendNum(asULL());
59 }
60
toStringPretty() const61 std::string Timestamp::toStringPretty() const {
62 std::stringstream ss;
63 ss << time_t_to_String_short(secs) << ':' << i;
64 return ss.str();
65 }
66
toString() const67 std::string Timestamp::toString() const {
68 std::stringstream ss;
69 ss << "Timestamp(" << secs << ", " << i << ")";
70 return ss.str();
71 }
72
toBSON() const73 BSONObj Timestamp::toBSON() const {
74 BSONObjBuilder bldr;
75 bldr.append("", *this);
76 return bldr.obj();
77 }
78 }
79