1/*
2 * Copyright (c) 2023 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 OHOS_ABILITY_RUNTIME_TIME_UTIL_H
17#define OHOS_ABILITY_RUNTIME_TIME_UTIL_H
18
19#include <cinttypes>
20#include <sys/stat.h>
21#include <time.h>
22
23namespace OHOS::AbilityRuntime {
24namespace TimeUtil {
25// NANOSECONDS mean 10^9 nano second
26constexpr int64_t NANOSECONDS = 1000000000;
27// MICROSECONDS mean 10^6 milli second
28constexpr int64_t MICROSECONDS = 1000000;
29constexpr int64_t SEC_TO_MILLISEC = 1000;
30constexpr int64_t MAX_TIME_BUFF = 64; // 64 : for example 2021-05-27-01-01-01
31constexpr int32_t DECIMAL_BASE = 10;
32
33[[maybe_unused]] static int64_t SystemTimeMillisecond()
34{
35    struct timespec t;
36    t.tv_sec = 0;
37    t.tv_nsec = 0;
38    clock_gettime(CLOCK_MONOTONIC, &t);
39    return (int64_t)((t.tv_sec) * NANOSECONDS + t.tv_nsec) / MICROSECONDS;
40}
41
42[[maybe_unused]] static std::string FormatTime(const std::string &format)
43{
44    auto now = std::chrono::system_clock::now();
45    auto millisecs = std::chrono::duration_cast<std::chrono::milliseconds>(now.time_since_epoch());
46    auto timestamp = millisecs.count();
47    std::time_t tt = static_cast<std::time_t>(timestamp / SEC_TO_MILLISEC);
48    std::tm t = *std::localtime(&tt);
49    char buffer[MAX_TIME_BUFF] = {0};
50    std::strftime(buffer, sizeof(buffer), format.c_str(), &t);
51    return std::string(buffer);
52}
53
54[[maybe_unused]] static std::string DefaultCurrentTimeStr()
55{
56    auto now = std::chrono::system_clock::now();
57    auto millis = std::chrono::duration_cast<std::chrono::milliseconds>(now.time_since_epoch());
58    auto timestamp = millis.count();
59    std::time_t tt = static_cast<std::time_t>(timestamp / SEC_TO_MILLISEC);
60    std::tm t{};
61    localtime_r(&tt, &t);
62    char buffer[MAX_TIME_BUFF] = {0};
63    std::strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", &t);
64    auto remainder = timestamp % SEC_TO_MILLISEC;
65    std::string milliStr("000");
66    for (int i = 2; i >= 0 && remainder > 0; i--) {
67        milliStr[i] = '0' + remainder % DECIMAL_BASE;
68        remainder /= DECIMAL_BASE;
69    }
70    return std::string(buffer) + "." + milliStr;
71}
72}  // namespace TimeUtil
73}  // namespace OHOS::AbilityRuntime
74#endif  // OHOS_ABILITY_RUNTIME_TIME_UTIL_H