1 /*
2 * Copyright (c) 2022 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 "metadata/metadata_reader.h"
17
18 #include "metadata/metadata_serializer.h"
19 #include "util/file.h"
20 #include "util/logger.h"
21
22 namespace OHOS {
23 namespace Idl {
24 const char* MetadataReader::TAG = "MetadataReader";
25
ReadMetadataFromFile(const String & filePath)26 std::shared_ptr<MetaComponent> MetadataReader::ReadMetadataFromFile(const String& filePath)
27 {
28 File file(filePath, File::READ);
29 if (!file.IsValid()) {
30 Logger::E(TAG, "Open \"%s\" file failed.", filePath.string());
31 return nullptr;
32 }
33
34 if (!file.Reset()) {
35 Logger::E(TAG, "Reset \"%s\" file failed.", filePath.string());
36 return nullptr;
37 }
38
39 MetaComponent header;
40
41 if (!file.ReadData((void*)&header, sizeof(MetaComponent))) {
42 Logger::E(TAG, "Read \"%s\" file failed.", filePath.string());
43 return nullptr;
44 }
45
46 if (header.magic_ != METADATA_MAGIC_NUMBER || header.size_ < 0) {
47 Logger::E(TAG, "The metadata in \"%s\" file is bad.", filePath.string());
48 return nullptr;
49 }
50
51 if (!file.Reset()) {
52 Logger::E(TAG, "Reset \"%s\" file failed.", filePath.string());
53 return nullptr;
54 }
55
56 void* data = malloc(header.size_);
57 if (data == nullptr) {
58 Logger::E(TAG, "Malloc metadata failed.");
59 return nullptr;
60 }
61
62 if (!file.ReadData(data, header.size_)) {
63 Logger::E(TAG, "Read \"%s\" file failed.", filePath.string());
64 free(data);
65 return nullptr;
66 }
67
68 std::shared_ptr<MetaComponent> metadata(
69 (MetaComponent*)data, [](MetaComponent* p) { free(p); });
70
71 MetadataSerializer serializer((uintptr_t)data);
72 serializer.Deserialize();
73
74 return metadata;
75 }
76 } // namespace Idl
77 } // namespace OHOS
78