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_type.h"
32
33 #include "mongo/util/mongoutils/str.h"
34
35 namespace mongo {
36
37 namespace {
38
makeStoreStatus(const StringData & sdata,size_t length,std::ptrdiff_t debug_offset)39 Status makeStoreStatus(const StringData& sdata, size_t length, std::ptrdiff_t debug_offset) {
40 str::stream ss;
41 ss << "buffer size too small to write StringData(" << sdata.size() << ") bytes into buffer["
42 << length << "] at offset: " << debug_offset;
43 return Status(ErrorCodes::Overflow, ss);
44 }
45 } // namespace
46
load(StringData * sdata,const char * ptr,size_t length,size_t * advanced,std::ptrdiff_t debug_offset)47 Status DataType::Handler<StringData>::load(StringData* sdata,
48 const char* ptr,
49 size_t length,
50 size_t* advanced,
51 std::ptrdiff_t debug_offset) {
52 if (sdata) {
53 *sdata = StringData(ptr, length);
54 }
55
56 if (advanced) {
57 *advanced = length;
58 }
59
60 return Status::OK();
61 }
62
store(const StringData & sdata,char * ptr,size_t length,size_t * advanced,std::ptrdiff_t debug_offset)63 Status DataType::Handler<StringData>::store(const StringData& sdata,
64 char* ptr,
65 size_t length,
66 size_t* advanced,
67 std::ptrdiff_t debug_offset) {
68 if (sdata.size() > length) {
69 return makeStoreStatus(sdata, length, debug_offset);
70 }
71
72 if (ptr) {
73 std::memcpy(ptr, sdata.rawData(), sdata.size());
74 }
75
76 if (advanced) {
77 *advanced = sdata.size();
78 }
79
80 return Status::OK();
81 }
82
83 } // namespace mongo
84