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_mem.h"
17
18 #include <cstdlib>
19 #include "securec.h"
20
21
22 namespace panda {
23 namespace ecmascript {
init()24 bool ZipFileReaderMem::init()
25 {
26 if (!ZipFileReader::init()) {
27 return false;
28 }
29 posix_fadvise(fd_, 0, 0, POSIX_FADV_SEQUENTIAL);
30
31 fileContent_.resize(fileLen_);
32 auto pos = std::string::size_type{};
33 while (true) {
34 auto const readCount = read(fd_, fileContent_.data() + pos, fileContent_.size() - pos);
35 if (readCount < 0) {
36 fileContent_.clear();
37 return false;
38 } else if (readCount == 0) {
39 break;
40 }
41
42 pos += readCount;
43 }
44 return true;
45 }
46
ReadBuffer(size_t startPos, size_t bufferSize)47 std::string ZipFileReaderMem::ReadBuffer(size_t startPos, size_t bufferSize)
48 {
49 if (startPos + bufferSize > fileContent_.length()) {
50 return "";
51 }
52
53 return fileContent_.substr(startPos, bufferSize);
54 }
55
ReadBuffer(uint8_t *dst, size_t startPos, size_t bufferSize)56 bool ZipFileReaderMem::ReadBuffer(uint8_t *dst, size_t startPos, size_t bufferSize)
57 {
58 if (!dst || startPos + bufferSize > fileContent_.length()) {
59 return false;
60 }
61
62 if (memcpy_s(dst, bufferSize, fileContent_.data() + startPos, bufferSize) != EOK) {
63 return false;
64 }
65
66 return true;
67 }
68 }
69 }