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/base/data_view.h"
32
33 #include <cstring>
34
35 #include "mongo/base/data_type_endian.h"
36 #include "mongo/platform/endian.h"
37 #include "mongo/unittest/unittest.h"
38
39 namespace mongo {
40
TEST(DataView,ConstDataView)41 TEST(DataView, ConstDataView) {
42 char buf[sizeof(uint32_t) * 3];
43 uint32_t native = 1234;
44 uint32_t le = endian::nativeToLittle(native);
45 uint32_t be = endian::nativeToBig(native);
46
47 std::memcpy(buf, &native, sizeof(uint32_t));
48 std::memcpy(buf + sizeof(uint32_t), &le, sizeof(uint32_t));
49 std::memcpy(buf + sizeof(uint32_t) * 2, &be, sizeof(uint32_t));
50
51 ConstDataView cdv(buf);
52
53 ASSERT_EQUALS(buf, cdv.view());
54 ASSERT_EQUALS(buf + 5, cdv.view(5));
55
56 ASSERT_EQUALS(native, cdv.read<uint32_t>());
57 ASSERT_EQUALS(native, cdv.read<LittleEndian<uint32_t>>(sizeof(uint32_t)));
58 ASSERT_EQUALS(native, cdv.read<BigEndian<uint32_t>>(sizeof(uint32_t) * 2));
59 }
60
TEST(DataView,DataView)61 TEST(DataView, DataView) {
62 char buf[sizeof(uint32_t) * 3];
63 uint32_t native = 1234;
64
65 DataView dv(buf);
66
67 dv.write(native);
68 dv.write(LittleEndian<uint32_t>(native), sizeof(uint32_t));
69 dv.write(BigEndian<uint32_t>(native), sizeof(uint32_t) * 2);
70
71 ASSERT_EQUALS(buf, dv.view());
72 ASSERT_EQUALS(buf + 5, dv.view(5));
73
74 ASSERT_EQUALS(native, dv.read<uint32_t>());
75 ASSERT_EQUALS(native, dv.read<LittleEndian<uint32_t>>(sizeof(uint32_t)));
76 ASSERT_EQUALS(native, dv.read<BigEndian<uint32_t>>(sizeof(uint32_t) * 2));
77 }
78
79 } // namespace mongo
80