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#include "zip_file_reader.h"
17
18#include <atomic>
19#include <chrono>
20#include <climits>
21#include <memory>
22#include <sys/stat.h>
23
24#include "zip_file_reader_io.h"
25#include "zip_file_reader_mem.h"
26
27namespace panda {
28namespace ecmascript {
29constexpr size_t MEM_MAX_FILE_SIZE = 1u;
30
31std::shared_ptr<ZipFileReader> ZipFileReader::CreateZipFileReader(const std::string &filePath)
32{
33    size_t fileSize = GetFileLen(filePath);
34    if (fileSize == 0) {
35        return nullptr;
36    }
37
38    std::shared_ptr<ZipFileReader> result;
39    if (fileSize <= MEM_MAX_FILE_SIZE) {
40        result = std::make_shared<ZipFileReaderMem>(filePath);
41    } else {
42        result = std::make_shared<ZipFileReaderIo>(filePath);
43    }
44
45    result->fileLen_ = fileSize;
46    if (result->init()) {
47        return result;
48    }
49    return nullptr;
50}
51
52ZipFileReader::~ZipFileReader()
53{
54    if (fd_ >= 0 && closable_) {
55        close(fd_);
56        fd_ = -1;
57    }
58}
59
60size_t ZipFileReader::GetFileLen(const std::string &filePath)
61{
62    if (filePath.empty()) {
63        return 0;
64    }
65
66    struct stat fileStat{};
67    if (stat(filePath.c_str(), &fileStat) == 0) {
68        return fileStat.st_size;
69    }
70
71    return 0;
72}
73
74bool ZipFileReader::init()
75{
76    if (filePath_.empty()) {
77        return false;
78    }
79    fd_ = open(filePath_.c_str(), O_RDONLY);
80    if (fd_ < 0) {
81        return false;
82    }
83
84    return true;
85}
86}
87}