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/*
* Copyright (C) 2015 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.
*/
#include "Source.h"
#include "io/ZipArchive.h"
#include "util/Util.h"
#include <utils/FileMap.h>
#include <ziparchive/zip_archive.h>
namespace aapt {
namespace io {
ZipFile::ZipFile(ZipArchiveHandle handle, const ZipEntry& entry, const Source& source) :
mZipHandle(handle), mZipEntry(entry), mSource(source) {
}
std::unique_ptr<IData> ZipFile::openAsData() {
if (mZipEntry.method == kCompressStored) {
int fd = GetFileDescriptor(mZipHandle);
android::FileMap fileMap;
bool result = fileMap.create(nullptr, fd, mZipEntry.offset,
mZipEntry.uncompressed_length, true);
if (!result) {
return {};
}
return util::make_unique<MmappedData>(std::move(fileMap));
} else {
std::unique_ptr<uint8_t[]> data = std::unique_ptr<uint8_t[]>(
new uint8_t[mZipEntry.uncompressed_length]);
int32_t result = ExtractToMemory(mZipHandle, &mZipEntry, data.get(),
static_cast<uint32_t>(mZipEntry.uncompressed_length));
if (result != 0) {
return {};
}
return util::make_unique<MallocData>(std::move(data), mZipEntry.uncompressed_length);
}
}
const Source& ZipFile::getSource() const {
return mSource;
}
ZipFileCollectionIterator::ZipFileCollectionIterator(ZipFileCollection* collection) :
mCurrent(collection->mFiles.begin()), mEnd(collection->mFiles.end()) {
}
bool ZipFileCollectionIterator::hasNext() {
return mCurrent != mEnd;
}
IFile* ZipFileCollectionIterator::next() {
IFile* result = mCurrent->second.get();
++mCurrent;
return result;
}
ZipFileCollection::ZipFileCollection() : mHandle(nullptr) {
}
std::unique_ptr<ZipFileCollection> ZipFileCollection::create(const StringPiece& path,
std::string* outError) {
constexpr static const int32_t kEmptyArchive = -6;
std::unique_ptr<ZipFileCollection> collection = std::unique_ptr<ZipFileCollection>(
new ZipFileCollection());
int32_t result = OpenArchive(path.data(), &collection->mHandle);
if (result != 0) {
// If a zip is empty, result will be an error code. This is fine and we should
// return an empty ZipFileCollection.
if (result == kEmptyArchive) {
return collection;
}
if (outError) *outError = ErrorCodeString(result);
return {};
}
void* cookie = nullptr;
result = StartIteration(collection->mHandle, &cookie, nullptr, nullptr);
if (result != 0) {
if (outError) *outError = ErrorCodeString(result);
return {};
}
using IterationEnder = std::unique_ptr<void, decltype(EndIteration)*>;
IterationEnder iterationEnder(cookie, EndIteration);
ZipString zipEntryName;
ZipEntry zipData;
while ((result = Next(cookie, &zipData, &zipEntryName)) == 0) {
std::string zipEntryPath = std::string(reinterpret_cast<const char*>(zipEntryName.name),
zipEntryName.name_length);
std::string nestedPath = path.toString() + "@" + zipEntryPath;
collection->mFiles[zipEntryPath] = util::make_unique<ZipFile>(collection->mHandle,
zipData,
Source(nestedPath));
}
if (result != -1) {
if (outError) *outError = ErrorCodeString(result);
return {};
}
return collection;
}
IFile* ZipFileCollection::findFile(const StringPiece& path) {
auto iter = mFiles.find(path.toString());
if (iter != mFiles.end()) {
return iter->second.get();
}
return nullptr;
}
std::unique_ptr<IFileCollectionIterator> ZipFileCollection::iterator() {
return util::make_unique<ZipFileCollectionIterator>(this);
}
ZipFileCollection::~ZipFileCollection() {
if (mHandle) {
CloseArchive(mHandle);
}
}
} // namespace io
} // namespace aapt
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