1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
/**
* Copyright (C) 2014 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/db/jsobj.h"
#include "mongo/util/stringutils.h"
namespace mongo {
/** Compare two bson elements, provided as const char *'s, by field name. */
class BSONIteratorSorted::ElementFieldCmp {
public:
ElementFieldCmp(bool isArray);
bool operator()(const char* s1, const char* s2) const;
private:
LexNumCmp _cmp;
};
BSONIteratorSorted::ElementFieldCmp::ElementFieldCmp(bool isArray) : _cmp(!isArray) {}
bool BSONIteratorSorted::ElementFieldCmp::operator()(const char* s1, const char* s2) const {
// Skip the type byte and compare field names.
return _cmp(s1 + 1, s2 + 1);
}
BSONIteratorSorted::BSONIteratorSorted(const BSONObj& o, const ElementFieldCmp& cmp) {
_nfields = o.nFields();
_fields = new const char* [_nfields];
int x = 0;
BSONObjIterator i(o);
while (i.more()) {
_fields[x++] = i.next().rawdata();
verify(_fields[x - 1]);
}
verify(x == _nfields);
std::sort(_fields, _fields + _nfields, cmp);
_cur = 0;
}
BSONObjIteratorSorted::BSONObjIteratorSorted(const BSONObj& object)
: BSONIteratorSorted(object, ElementFieldCmp(false)) {}
BSONArrayIteratorSorted::BSONArrayIteratorSorted(const BSONArray& array)
: BSONIteratorSorted(array, ElementFieldCmp(true)) {}
} // namespace mongo
|
