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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 "flatten/Archive.h"
#include <cstdio>
#include <memory>
#include <string>
#include <vector>
#include "android-base/errors.h"
#include "android-base/macros.h"
#include "android-base/utf8.h"
#include "androidfw/StringPiece.h"
#include "ziparchive/zip_writer.h"
#include "util/Files.h"
using ::android::StringPiece;
using ::android::base::SystemErrorCodeToString;
namespace aapt {
namespace {
class DirectoryWriter : public IArchiveWriter {
public:
DirectoryWriter() = default;
bool Open(const StringPiece& out_dir) {
dir_ = out_dir.to_string();
file::FileType type = file::GetFileType(dir_);
if (type == file::FileType::kNonexistant) {
error_ = "directory does not exist";
return false;
} else if (type != file::FileType::kDirectory) {
error_ = "not a directory";
return false;
}
return true;
}
bool StartEntry(const StringPiece& path, uint32_t flags) override {
if (file_) {
return false;
}
std::string full_path = dir_;
file::AppendPath(&full_path, path);
file::mkdirs(file::GetStem(full_path).to_string());
file_ = {::android::base::utf8::fopen(full_path.c_str(), "wb"), fclose};
if (!file_) {
error_ = SystemErrorCodeToString(errno);
return false;
}
return true;
}
bool Write(const void* data, int len) override {
if (!file_) {
return false;
}
if (fwrite(data, 1, len, file_.get()) != static_cast<size_t>(len)) {
error_ = SystemErrorCodeToString(errno);
file_.reset(nullptr);
return false;
}
return true;
}
bool FinishEntry() override {
if (!file_) {
return false;
}
file_.reset(nullptr);
return true;
}
bool WriteFile(const StringPiece& path, uint32_t flags, io::InputStream* in) override {
if (!StartEntry(path, flags)) {
return false;
}
const void* data = nullptr;
size_t len = 0;
while (in->Next(&data, &len)) {
if (!Write(data, static_cast<int>(len))) {
return false;
}
}
return !in->HadError();
}
bool HadError() const override { return !error_.empty(); }
std::string GetError() const override { return error_; }
private:
DISALLOW_COPY_AND_ASSIGN(DirectoryWriter);
std::string dir_;
std::unique_ptr<FILE, decltype(fclose)*> file_ = {nullptr, fclose};
std::string error_;
};
class ZipFileWriter : public IArchiveWriter {
public:
ZipFileWriter() = default;
bool Open(const StringPiece& path) {
file_ = {::android::base::utf8::fopen(path.to_string().c_str(), "w+b"), fclose};
if (!file_) {
error_ = SystemErrorCodeToString(errno);
return false;
}
writer_ = util::make_unique<ZipWriter>(file_.get());
return true;
}
bool StartEntry(const StringPiece& path, uint32_t flags) override {
if (!writer_) {
return false;
}
size_t zip_flags = 0;
if (flags & ArchiveEntry::kCompress) {
zip_flags |= ZipWriter::kCompress;
}
if (flags & ArchiveEntry::kAlign) {
zip_flags |= ZipWriter::kAlign32;
}
int32_t result = writer_->StartEntry(path.data(), zip_flags);
if (result != 0) {
error_ = ZipWriter::ErrorCodeString(result);
return false;
}
return true;
}
bool Write(const void* data, int len) override {
int32_t result = writer_->WriteBytes(data, len);
if (result != 0) {
error_ = ZipWriter::ErrorCodeString(result);
return false;
}
return true;
}
bool FinishEntry() override {
int32_t result = writer_->FinishEntry();
if (result != 0) {
error_ = ZipWriter::ErrorCodeString(result);
return false;
}
return true;
}
bool WriteFile(const StringPiece& path, uint32_t flags, io::InputStream* in) override {
while (true) {
if (!StartEntry(path, flags)) {
return false;
}
const void* data = nullptr;
size_t len = 0;
while (in->Next(&data, &len)) {
if (!Write(data, static_cast<int>(len))) {
return false;
}
}
if (in->HadError()) {
return false;
}
if (!FinishEntry()) {
return false;
}
// Check to see if the file was compressed enough. This is preserving behavior of AAPT.
if ((flags & ArchiveEntry::kCompress) != 0 && in->CanRewind()) {
ZipWriter::FileEntry last_entry;
int32_t result = writer_->GetLastEntry(&last_entry);
CHECK(result == 0);
if (last_entry.compressed_size + (last_entry.compressed_size / 10) >
last_entry.uncompressed_size) {
// The file was not compressed enough, rewind and store it uncompressed.
if (!in->Rewind()) {
// Well we tried, may as well keep what we had.
return true;
}
int32_t result = writer_->DiscardLastEntry();
if (result != 0) {
error_ = ZipWriter::ErrorCodeString(result);
return false;
}
flags &= ~ArchiveEntry::kCompress;
continue;
}
}
return true;
}
}
bool HadError() const override { return !error_.empty(); }
std::string GetError() const override { return error_; }
virtual ~ZipFileWriter() {
if (writer_) {
writer_->Finish();
}
}
private:
DISALLOW_COPY_AND_ASSIGN(ZipFileWriter);
std::unique_ptr<FILE, decltype(fclose)*> file_ = {nullptr, fclose};
std::unique_ptr<ZipWriter> writer_;
std::string error_;
};
} // namespace
std::unique_ptr<IArchiveWriter> CreateDirectoryArchiveWriter(IDiagnostics* diag,
const StringPiece& path) {
std::unique_ptr<DirectoryWriter> writer = util::make_unique<DirectoryWriter>();
if (!writer->Open(path)) {
diag->Error(DiagMessage(path) << writer->GetError());
return {};
}
return std::move(writer);
}
std::unique_ptr<IArchiveWriter> CreateZipFileArchiveWriter(IDiagnostics* diag,
const StringPiece& path) {
std::unique_ptr<ZipFileWriter> writer = util::make_unique<ZipFileWriter>();
if (!writer->Open(path)) {
diag->Error(DiagMessage(path) << writer->GetError());
return {};
}
return std::move(writer);
}
} // namespace aapt