1/*
2 * Copyright (c) 2022-2023 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 UTILITY_H
17#define UTILITY_H
18
19#include <cstring>
20#include <map>
21#include <sstream>
22#include <string>
23#include <type_traits>
24
25namespace OHOS {
26class Parcel;
27namespace Msdp {
28namespace DeviceStatus {
29
30template<typename, typename = std::void_t<>>
31struct IsStreamable : public std::false_type {};
32
33template<typename T>
34struct IsStreamable<T, std::void_t<decltype(operator<<(std::declval<std::ostream>(), std::declval<T>()))>>
35    : public std::true_type {};
36
37class Utility {
38public:
39    static size_t CopyNulstr(char *dest, size_t size, const char *src);
40    static bool StartWith(const char *str, const char *prefix);
41    static bool StartWith(const std::string &str, const std::string &prefix);
42
43    static void RemoveTrailingChars(char c, char *path);
44    static void RemoveTrailingChars(const std::string &toRemoved, std::string &path);
45    static bool IsEmpty(const char *str) noexcept;
46    static bool IsEqual(const char *s1, const char *s2) noexcept;
47
48    template <typename... Args,
49              typename = std::enable_if_t<(IsStreamable<Args>::value && ...), std::string>>
50    static std::string ConcatAsString(Args&&... args)
51    {
52        std::ostringstream ss;
53        (..., (ss << std::forward<Args>(args)));
54        return ss.str();
55    }
56
57    static void RemoveSpace(std::string &str);
58    static bool IsInteger(const std::string &target);
59
60    static std::string Anonymize(const std::string &id);
61    static std::string Anonymize(const char *id);
62
63    static bool DoesFileExist(const char *path);
64    static ssize_t GetFileSize(const char *path);
65    static ssize_t GetFileSize(const std::string &filePath);
66
67    static void ShowFileAttributes(const char *path);
68    static void ShowUserAndGroup();
69
70    static int64_t GetSysClockTime();
71};
72
73inline bool Utility::IsEmpty(const char *str) noexcept
74{
75    return ((str == nullptr) || (str[0] == '\0'));
76}
77
78inline bool Utility::IsEqual(const char *s1, const char *s2) noexcept
79{
80    if (IsEmpty(s1)) {
81        return IsEmpty(s2);
82    } else if (IsEmpty(s2)) {
83        return false;
84    }
85    return (std::strcmp(s1, s2) == 0);
86}
87
88inline std::string Utility::Anonymize(const std::string &id)
89{
90    return Anonymize(id.c_str());
91}
92} // namespace DeviceStatus
93} // namespace Msdp
94} // namespace OHOS
95#endif // UTILITY_H