1 /*
2  * Copyright (c) 2024 Huawei Device Co., Ltd.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  *     http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #ifndef GPS_NTP_TIME_CHECK_H
17 #define GPS_NTP_TIME_CHECK_H
18 #ifdef FEATURE_GNSS_SUPPORT
19 #ifdef TIME_SERVICE_ENABLE
20 
21 #include "gps_time_manager.h"
22 
23 namespace OHOS {
24 namespace Location {
25 const int64_t DEFAULT_UNCERTAINTY = 30;
26 class NtpTimeCheck {
27 public:
28     static NtpTimeCheck* GetInstance();
29     bool CheckNtpTime(int64_t ntpMsTime, int64_t msTimeSynsBoot);
30     int GetUncertainty();
31     void SetGpsTime(int64_t gpsMsTime, int64_t bootTimeMs);
32 
33 private:
34     NtpTimeCheck();
35     ~NtpTimeCheck();
36     bool CompareTime(int64_t currentNtpTime, int64_t compareTime);
37     GpsTimeManager gpsTimeManager_;
38     int difference_ = DEFAULT_UNCERTAINTY;
39 };
40 } // namespace Location
41 } // namespace OHOS
42 
43 #endif // TIME_SERVICE_ENABLE
44 #endif // FEATURE_GNSS_SUPPORT
45 #endif // GPS_NTP_TIME_CHECK_H
46