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