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_BASE_ZIP_FILE_READER_H
17 #define OHOS_ABILITY_BASE_ZIP_FILE_READER_H
18 
19 #include <fcntl.h>
20 #include <memory>
21 #include <unistd.h>
22 #include <string>
23 
24 namespace OHOS {
25 namespace AbilityBase {
26 class ZipFileReader {
27 public:
28     static std::shared_ptr<ZipFileReader> CreateZipFileReader(const std::string &filePath);
29     static size_t GetFileLen(const std::string &filePath);
30 
ZipFileReader(const std::string & filePath)31     ZipFileReader(const std::string &filePath) : filePath_(filePath) {}
32     ZipFileReader(ZipFileReader &) = delete;
33     void operator=(ZipFileReader &) = delete;
34     virtual ~ZipFileReader();
35 
36     virtual std::string ReadBuffer(size_t startPos, size_t bufferSize) = 0;
37     virtual bool ReadBuffer(uint8_t *dst, size_t startPos, size_t bufferSize) = 0;
GetFileLen()38     size_t GetFileLen() const
39     {
40         return fileLen_;
41     }
GetFd()42     int GetFd() const
43     {
44         return fd_;
45     }
SetClosable(bool closable)46     void SetClosable(bool closable)
47     {
48         closable_ = closable;
49     }
50 protected:
51     virtual bool init();
52 
53 protected:
54     std::string filePath_;
55     size_t fileLen_ = 0;
56 
57     // For safe memory, reserve this field and keep the file opened.
58     int fd_ = -1;
59     // close fd in destructor
60     bool closable_ = true;
61 };
62 }
63 }
64 
65 #endif