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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 "io/ZipArchive.h"
#include "utils/FileMap.h"
#include "ziparchive/zip_archive.h"
#include "Source.h"
#include "trace/TraceBuffer.h"
#include "util/Files.h"
#include "util/Util.h"
using ::android::StringPiece;
namespace aapt {
namespace io {
ZipFile::ZipFile(ZipArchiveHandle handle, const ZipEntry& entry,
const Source& source)
: zip_handle_(handle), zip_entry_(entry), source_(source) {}
std::unique_ptr<IData> ZipFile::OpenAsData() {
// The file will fail to be mmaped if it is empty
if (zip_entry_.uncompressed_length == 0) {
return util::make_unique<EmptyData>();
}
if (zip_entry_.method == kCompressStored) {
int fd = GetFileDescriptor(zip_handle_);
android::FileMap file_map;
bool result = file_map.create(nullptr, fd, zip_entry_.offset,
zip_entry_.uncompressed_length, true);
if (!result) {
return {};
}
return util::make_unique<MmappedData>(std::move(file_map));
} else {
std::unique_ptr<uint8_t[]> data =
std::unique_ptr<uint8_t[]>(new uint8_t[zip_entry_.uncompressed_length]);
int32_t result =
ExtractToMemory(zip_handle_, &zip_entry_, data.get(),
static_cast<uint32_t>(zip_entry_.uncompressed_length));
if (result != 0) {
return {};
}
return util::make_unique<MallocData>(std::move(data),
zip_entry_.uncompressed_length);
}
}
std::unique_ptr<io::InputStream> ZipFile::OpenInputStream() {
return OpenAsData();
}
const Source& ZipFile::GetSource() const {
return source_;
}
bool ZipFile::WasCompressed() {
return zip_entry_.method != kCompressStored;
}
ZipFileCollectionIterator::ZipFileCollectionIterator(
ZipFileCollection* collection)
: current_(collection->files_.begin()), end_(collection->files_.end()) {}
bool ZipFileCollectionIterator::HasNext() {
return current_ != end_;
}
IFile* ZipFileCollectionIterator::Next() {
IFile* result = current_->get();
++current_;
return result;
}
ZipFileCollection::ZipFileCollection() : handle_(nullptr) {}
std::unique_ptr<ZipFileCollection> ZipFileCollection::Create(
const StringPiece& path, std::string* out_error) {
TRACE_CALL();
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->handle_);
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 (out_error) *out_error = ErrorCodeString(result);
return {};
}
void* cookie = nullptr;
result = StartIteration(collection->handle_, &cookie, nullptr, nullptr);
if (result != 0) {
if (out_error) *out_error = ErrorCodeString(result);
return {};
}
using IterationEnder = std::unique_ptr<void, decltype(EndIteration)*>;
IterationEnder iteration_ender(cookie, EndIteration);
ZipString zip_entry_name;
ZipEntry zip_data;
while ((result = Next(cookie, &zip_data, &zip_entry_name)) == 0) {
std::string zip_entry_path =
std::string(reinterpret_cast<const char*>(zip_entry_name.name),
zip_entry_name.name_length);
// Do not add folders to the file collection
if (util::EndsWith(zip_entry_path, "/")) {
continue;
}
std::unique_ptr<IFile> file = util::make_unique<ZipFile>(collection->handle_, zip_data,
Source(zip_entry_path, path.to_string()));
collection->files_by_name_[zip_entry_path] = file.get();
collection->files_.push_back(std::move(file));
}
if (result != -1) {
if (out_error) *out_error = ErrorCodeString(result);
return {};
}
return collection;
}
IFile* ZipFileCollection::FindFile(const StringPiece& path) {
auto iter = files_by_name_.find(path.to_string());
if (iter != files_by_name_.end()) {
return iter->second;
}
return nullptr;
}
std::unique_ptr<IFileCollectionIterator> ZipFileCollection::Iterator() {
return util::make_unique<ZipFileCollectionIterator>(this);
}
char ZipFileCollection::GetDirSeparator() {
// According to the zip file specification, section 4.4.17.1:
// "All slashes MUST be forward slashes '/' as opposed to backwards slashes '\' for compatibility
// with Amiga and UNIX file systems etc."
return '/';
}
ZipFileCollection::~ZipFileCollection() {
if (handle_) {
CloseArchive(handle_);
}
}
} // namespace io
} // namespace aapt
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