1 /*
2 * Copyright (C) 2018 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "idmap2/ZipFile.h"
18
19 #include <memory>
20 #include <string>
21
22 #include "idmap2/Result.h"
23
24 namespace android::idmap2 {
25
Allocate(size_t size)26 std::unique_ptr<MemoryChunk> MemoryChunk::Allocate(size_t size) {
27 void* ptr = ::operator new(sizeof(MemoryChunk) + size);
28 std::unique_ptr<MemoryChunk> chunk(reinterpret_cast<MemoryChunk*>(ptr));
29 chunk->size = size;
30 return chunk;
31 }
32
Open(const std::string & path)33 std::unique_ptr<const ZipFile> ZipFile::Open(const std::string& path) {
34 ::ZipArchiveHandle handle;
35 int32_t status = ::OpenArchive(path.c_str(), &handle);
36 if (status != 0) {
37 return nullptr;
38 }
39 return std::unique_ptr<ZipFile>(new ZipFile(handle));
40 }
41
~ZipFile()42 ZipFile::~ZipFile() {
43 ::CloseArchive(handle_);
44 }
45
Uncompress(const std::string & entryPath) const46 std::unique_ptr<const MemoryChunk> ZipFile::Uncompress(const std::string& entryPath) const {
47 ::ZipEntry entry;
48 int32_t status = ::FindEntry(handle_, ::ZipString(entryPath.c_str()), &entry);
49 if (status != 0) {
50 return nullptr;
51 }
52 std::unique_ptr<MemoryChunk> chunk = MemoryChunk::Allocate(entry.uncompressed_length);
53 status = ::ExtractToMemory(handle_, &entry, chunk->buf, chunk->size);
54 if (status != 0) {
55 return nullptr;
56 }
57 return chunk;
58 }
59
Crc(const std::string & entryPath) const60 Result<uint32_t> ZipFile::Crc(const std::string& entryPath) const {
61 ::ZipEntry entry;
62 int32_t status = ::FindEntry(handle_, ::ZipString(entryPath.c_str()), &entry);
63 if (status != 0) {
64 return Error("failed to find zip entry %s", entryPath.c_str());
65 }
66 return entry.crc32;
67 }
68
69 } // namespace android::idmap2
70