1 /*
2 * Copyright (c) 2022 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 KV_DATASERVICE_CONSTANT_H
17 #define KV_DATASERVICE_CONSTANT_H
18
19 #include <sys/stat.h>
20 #include <sys/types.h>
21 #include <algorithm>
22 #include <cctype>
23 #include <locale>
24 #include <string>
25 #include <vector>
26 #include "visibility.h"
27
28 namespace OHOS {
29 namespace DistributedData {
30 class Constant {
31 public:
32 // concatenate strings and return a composition string.
33 API_EXPORT static std::string Concatenate(std::initializer_list<std::string> stringList);
34
35 API_EXPORT static std::string Join(
36 const std::string &prefix, const std::string &separator, std::initializer_list<std::string> params);
37
38 API_EXPORT static bool IsBackground(pid_t pid);
39
40 API_EXPORT static bool Equal(bool first, bool second);
41
42 API_EXPORT static bool NotEqual(bool first, bool second);
43
44 // delete left bland in s by reference.
45 template<typename T>
46 static void LeftTrim(T &s);
47
48 // delete right bland in s by reference.
49 template<typename T>
50 static void RightTrim(T &s);
51
52 // delete both left and right bland in s by reference.
53 template<typename T>
54 static void Trim(T &s);
55
56 // delete left bland in s by reference, not change raw string.
57 template<typename T>
58 static T LeftTrimCopy(T s);
59
60 // delete right bland in s by reference, not change raw string.
61 template<typename T>
62 static T RightTrimCopy(T s);
63
64 // delete both left and right bland in s by reference, not change raw string.
65 template<typename T>
66 static T TrimCopy(T s);
67
68 API_EXPORT static constexpr const char *KEY_SEPARATOR = "###";
69 };
70
71 // trim from start (in place)
72 template<typename T>
LeftTrim(T & s)73 void Constant::LeftTrim(T &s)
74 {
75 s.erase(s.begin(), std::find_if(s.begin(), s.end(), [](int ch) { return !std::isspace(ch); }));
76 }
77
78 // trim from end (in place)
79 template<typename T>
RightTrim(T & s)80 void Constant::RightTrim(T &s)
81 {
82 s.erase(std::find_if(s.rbegin(), s.rend(), [](int ch) { return !std::isspace(ch); }).base(), s.end());
83 }
84
85 // trim from both ends (in place)
86 template<typename T>
Trim(T & s)87 void Constant::Trim(T &s)
88 {
89 LeftTrim(s);
90 RightTrim(s);
91 }
92
93 // trim from start (copying)
94 template<typename T>
LeftTrimCopy(T s)95 T Constant::LeftTrimCopy(T s)
96 {
97 LeftTrim(s);
98 return s;
99 }
100
101 // trim from end (copying)
102 template<typename T>
RightTrimCopy(T s)103 T Constant::RightTrimCopy(T s)
104 {
105 RightTrim(s);
106 return s;
107 }
108
109 // trim from both ends (copying)
110 template<typename T>
TrimCopy(T s)111 T Constant::TrimCopy(T s)
112 {
113 Trim(s);
114 return s;
115 }
116 } // namespace DistributedKv
117 } // namespace OHOS
118 #endif // KV_DATASERVICE_CONSTANT_H
119