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/*
* Copyright (C) 2018 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 "idmap2/ZipFile.h"
#include <memory>
#include <string>
#include "idmap2/Result.h"
namespace android::idmap2 {
std::unique_ptr<MemoryChunk> MemoryChunk::Allocate(size_t size) {
void* ptr = ::operator new(sizeof(MemoryChunk) + size);
std::unique_ptr<MemoryChunk> chunk(reinterpret_cast<MemoryChunk*>(ptr));
chunk->size = size;
return chunk;
}
std::unique_ptr<const ZipFile> ZipFile::Open(const std::string& path) {
::ZipArchiveHandle handle;
int32_t status = ::OpenArchive(path.c_str(), &handle);
if (status != 0) {
return nullptr;
}
return std::unique_ptr<ZipFile>(new ZipFile(handle));
}
ZipFile::~ZipFile() {
::CloseArchive(handle_);
}
std::unique_ptr<const MemoryChunk> ZipFile::Uncompress(const std::string& entryPath) const {
::ZipEntry entry;
int32_t status = ::FindEntry(handle_, ::ZipString(entryPath.c_str()), &entry);
if (status != 0) {
return nullptr;
}
std::unique_ptr<MemoryChunk> chunk = MemoryChunk::Allocate(entry.uncompressed_length);
status = ::ExtractToMemory(handle_, &entry, chunk->buf, chunk->size);
if (status != 0) {
return nullptr;
}
return chunk;
}
Result<uint32_t> ZipFile::Crc(const std::string& entryPath) const {
::ZipEntry entry;
int32_t status = ::FindEntry(handle_, ::ZipString(entryPath.c_str()), &entry);
if (status != 0) {
return Error("failed to find zip entry %s", entryPath.c_str());
}
return entry.crc32;
}
} // namespace android::idmap2
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