71 lines
2.0 KiB
C++
71 lines
2.0 KiB
C++
/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "idmap2/ZipFile.h"
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#include <memory>
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#include <string>
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#include "idmap2/Result.h"
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namespace android::idmap2 {
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std::unique_ptr<MemoryChunk> MemoryChunk::Allocate(size_t size) {
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void* ptr = ::operator new(sizeof(MemoryChunk) + size);
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std::unique_ptr<MemoryChunk> chunk(reinterpret_cast<MemoryChunk*>(ptr));
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chunk->size = size;
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return chunk;
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}
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std::unique_ptr<const ZipFile> ZipFile::Open(const std::string& path) {
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::ZipArchiveHandle handle;
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int32_t status = ::OpenArchive(path.c_str(), &handle);
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if (status != 0) {
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::CloseArchive(handle);
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return nullptr;
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}
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return std::unique_ptr<ZipFile>(new ZipFile(handle));
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}
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ZipFile::~ZipFile() {
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::CloseArchive(handle_);
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}
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std::unique_ptr<const MemoryChunk> ZipFile::Uncompress(const std::string& entryPath) const {
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::ZipEntry entry;
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int32_t status = ::FindEntry(handle_, entryPath, &entry);
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if (status != 0) {
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return nullptr;
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}
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std::unique_ptr<MemoryChunk> chunk = MemoryChunk::Allocate(entry.uncompressed_length);
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status = ::ExtractToMemory(handle_, &entry, chunk->buf, chunk->size);
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if (status != 0) {
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return nullptr;
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}
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return chunk;
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}
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Result<uint32_t> ZipFile::Crc(const std::string& entryPath) const {
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::ZipEntry entry;
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int32_t status = ::FindEntry(handle_, entryPath, &entry);
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if (status != 0) {
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return Error("failed to find zip entry %s", entryPath.c_str());
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}
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return entry.crc32;
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}
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} // namespace android::idmap2
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