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
|
/* Copyright 2012 10gen 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.
*/
/**
* Utility functions for parsing numbers from strings.
*/
#pragma once
#include "mongo/base/status.h"
#include "mongo/base/string_data.h"
namespace mongo {
/**
* Parses a number out of a StringData.
*
* Parses "stringValue", interpreting it as a number of the given "base". On success, stores
* the parsed value into "*result" and returns Status::OK().
*
* Valid values for "base" are 2-36, with 0 meaning "choose the base by inspecting the prefix
* on the number", as in strtol. Returns Status::BadValue if an illegal value is supplied for
* "base".
*
* The entirety of the std::string must consist of digits in the given base, except optionally the
* first character may be "+" or "-", and hexadecimal numbers may begin "0x". Same as strtol,
* without the property of stripping whitespace at the beginning, and fails to parse if there
* are non-digit characters at the end of the string.
*
* See parse_number.cpp for the available instantiations, and add any new instantiations there.
*/
template <typename NumberType>
Status parseNumberFromStringWithBase(StringData stringValue, int base, NumberType* result);
template <typename NumberType>
static Status parseNumberFromString(StringData stringValue, NumberType* result) {
return parseNumberFromStringWithBase(stringValue, 0, result);
}
} // namespace mongo
|
