1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
|
/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define ATRACE_TAG ATRACE_TAG_RESOURCES
#include "androidfw/ApkAssets.h"
#include "android-base/logging.h"
#include "utils/Trace.h"
#include "ziparchive/zip_archive.h"
#include "androidfw/Asset.h"
#include "androidfw/Util.h"
namespace android {
std::unique_ptr<const ApkAssets> ApkAssets::Load(const std::string& path, bool system) {
return ApkAssets::LoadImpl(path, system, false /*load_as_shared_library*/);
}
std::unique_ptr<const ApkAssets> ApkAssets::LoadAsSharedLibrary(const std::string& path,
bool system) {
return ApkAssets::LoadImpl(path, system, true /*load_as_shared_library*/);
}
std::unique_ptr<const ApkAssets> ApkAssets::LoadImpl(const std::string& path, bool system,
bool load_as_shared_library) {
ATRACE_CALL();
::ZipArchiveHandle unmanaged_handle;
int32_t result = ::OpenArchive(path.c_str(), &unmanaged_handle);
if (result != 0) {
LOG(ERROR) << ::ErrorCodeString(result);
return {};
}
// Wrap the handle in a unique_ptr so it gets automatically closed.
std::unique_ptr<ApkAssets> loaded_apk(new ApkAssets());
loaded_apk->zip_handle_.reset(unmanaged_handle);
::ZipString entry_name("resources.arsc");
::ZipEntry entry;
result = ::FindEntry(loaded_apk->zip_handle_.get(), entry_name, &entry);
if (result != 0) {
LOG(ERROR) << ::ErrorCodeString(result);
return {};
}
if (entry.method == kCompressDeflated) {
LOG(WARNING) << "resources.arsc is compressed.";
}
loaded_apk->resources_asset_ =
loaded_apk->Open("resources.arsc", Asset::AccessMode::ACCESS_BUFFER);
if (loaded_apk->resources_asset_ == nullptr) {
return {};
}
loaded_apk->path_ = path;
loaded_apk->loaded_arsc_ =
LoadedArsc::Load(loaded_apk->resources_asset_->getBuffer(true /*wordAligned*/),
loaded_apk->resources_asset_->getLength(), system, load_as_shared_library);
if (loaded_apk->loaded_arsc_ == nullptr) {
return {};
}
// Need to force a move for mingw32.
return std::move(loaded_apk);
}
std::unique_ptr<Asset> ApkAssets::Open(const std::string& path, Asset::AccessMode /*mode*/) const {
ATRACE_NAME("ApkAssets::Open");
CHECK(zip_handle_ != nullptr);
::ZipString name(path.c_str());
::ZipEntry entry;
int32_t result = ::FindEntry(zip_handle_.get(), name, &entry);
if (result != 0) {
LOG(ERROR) << "No entry '" << path << "' found in APK.";
return {};
}
if (entry.method == kCompressDeflated) {
auto compressed_asset = util::make_unique<_CompressedAsset>();
if (compressed_asset->openChunk(::GetFileDescriptor(zip_handle_.get()), entry.offset,
entry.method, entry.uncompressed_length,
entry.compressed_length) != NO_ERROR) {
LOG(ERROR) << "Failed to decompress '" << path << "'.";
return {};
}
return std::move(compressed_asset);
} else {
auto uncompressed_asset = util::make_unique<_FileAsset>();
if (uncompressed_asset->openChunk(path.c_str(), ::GetFileDescriptor(zip_handle_.get()),
entry.offset, entry.uncompressed_length) != NO_ERROR) {
LOG(ERROR) << "Failed to mmap '" << path << "'.";
return {};
}
return std::move(uncompressed_asset);
}
return {};
}
} // namespace android
|