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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* 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 Server Side 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
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