1 /*
2 * Copyright (c) 2021-2024 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 #include "utils/string_utils.h"
17
18 #include <cstdarg>
19 #include <cstdio>
20 #include <cstring>
21 #include <fcntl.h>
22 #include <vector>
23 #include <unistd.h>
24
25 #include "securec.h"
26 #include "storage_service_log.h"
27
28 using namespace std;
29
30 namespace OHOS {
31 namespace StorageDaemon {
32 static constexpr int32_t BUFF_SIZE = 1024;
StringPrintf(const char * format,...)33 std::string StringPrintf(const char *format, ...)
34 {
35 va_list ap;
36 va_list apBackup;
37 va_start(ap, format);
38 va_copy(apBackup, ap);
39 char buf[BUFF_SIZE] = {0};
40 std::string result;
41
42 int count = vsnprintf_s(buf, sizeof(buf), sizeof(buf), format, apBackup);
43 if (count < 0) {
44 LOGE("vsnprintf_s error, errno %{public}d", errno);
45 } else if (count < BUFF_SIZE) {
46 result.append(buf, count);
47 } else {
48 LOGI("allocate larger buffer, len = %{public}d", count + 1);
49
50 char *newBuf = new char[count + 1];
51 if (newBuf != nullptr) {
52 count = vsnprintf_s(newBuf, count + 1, count + 1, format, ap);
53 if (count >= 0) {
54 result.append(newBuf, count);
55 }
56 }
57
58 delete[] newBuf;
59 }
60
61 va_end(apBackup);
62 va_end(ap);
63
64 return result;
65 }
66
SplitLine(std::string & line,std::string & token)67 std::vector<std::string> SplitLine(std::string &line, std::string &token)
68 {
69 std::vector<std::string> result;
70 std::string::size_type start;
71 std::string::size_type end;
72
73 start = 0;
74 end = line.find(token);
75 while (std::string::npos != end) {
76 result.push_back(line.substr(start, end - start));
77 start = end + token.size();
78 end = line.find(token, start);
79 }
80
81 if (start != line.length()) {
82 result.push_back(line.substr(start));
83 }
84
85 return result;
86 }
87
WriteFileSync(const char * path,const uint8_t * data,size_t size)88 bool WriteFileSync(const char *path, const uint8_t *data, size_t size)
89 {
90 int fd = open(path, O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR);
91 if (fd == -1) {
92 LOGE("open %{public}s failed, errno %{public}d", path, errno);
93 return false;
94 }
95
96 long len = write(fd, data, size);
97 if (len < 0) {
98 LOGE("write %{public}s failed, errno %{public}d", path, errno);
99 (void)close(fd);
100 return false;
101 }
102 if (static_cast<size_t>(len) != size) {
103 LOGE("write return len %{public}ld, not equal to content length %{public}zu", len, size);
104 (void)close(fd);
105 return false;
106 }
107
108 if (fsync(fd) != 0) {
109 LOGE("fsync %{public}s failed, errno %{public}d", path, errno);
110 (void)close(fd);
111 return false;
112 }
113 (void)close(fd);
114 return true;
115 }
116
SaveStringToFileSync(const std::string & path,const std::string & data)117 bool SaveStringToFileSync(const std::string &path, const std::string &data)
118 {
119 if (path.empty() || data.empty()) {
120 return false;
121 }
122 LOGD("enter %{public}s, size=%{public}zu", path.c_str(), data.length());
123 return WriteFileSync(path.c_str(), reinterpret_cast<const uint8_t *>(data.c_str()), data.size());
124 }
125
StringIsNumber(const std::string & content)126 bool StringIsNumber(const std::string &content)
127 {
128 if (content.empty()) {
129 return false;
130 }
131 bool isNum = true;
132 for (char c : content) {
133 if (!isdigit(c)) {
134 isNum = false;
135 break;
136 }
137 }
138 return isNum;
139 }
140
IsStringExist(const std::list<std::string> & strList,const std::string & content)141 bool IsStringExist(const std::list<std::string> &strList, const std::string &content)
142 {
143 auto it = std::find(strList.begin(), strList.end(), content);
144 return it != strList.end();
145 }
146 } // namespace StorageDaemon
147 } // namespace OHOS
148