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/*
* Copyright (C) 2008 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.
*/
#ifndef ART_LIBARTBASE_BASE_ZIP_ARCHIVE_H_
#define ART_LIBARTBASE_BASE_ZIP_ARCHIVE_H_
#include <stdint.h>
#include <memory>
#include <string>
#include <android-base/logging.h>
#include "globals.h"
#include "mem_map.h"
#include "os.h"
#include "safe_map.h"
#include "unix_file/random_access_file.h"
// system/core/zip_archive definitions.
struct ZipArchive;
struct ZipEntry;
typedef ZipArchive* ZipArchiveHandle;
namespace art {
class ZipArchive;
class MemMap;
class ZipEntry {
public:
bool ExtractToFile(File& file, std::string* error_msg);
// Extract this entry to anonymous memory (R/W).
// Returns null on failure and sets error_msg.
MemMap ExtractToMemMap(const char* zip_filename,
const char* entry_filename,
std::string* error_msg);
// Create a file-backed private (clean, R/W) memory mapping to this entry.
// 'zip_filename' is used for diagnostics only,
// the original file that the ZipArchive was open with is used
// for the mapping.
//
// Will only succeed if the entry is stored uncompressed.
// Returns invalid MemMap on failure and sets error_msg.
MemMap MapDirectlyFromFile(const char* zip_filename, /*out*/std::string* error_msg);
virtual ~ZipEntry();
MemMap MapDirectlyOrExtract(const char* zip_filename,
const char* entry_filename,
std::string* error_msg,
size_t alignment);
uint32_t GetUncompressedLength();
uint32_t GetCrc32();
bool IsUncompressed();
bool IsAlignedTo(size_t alignment) const;
private:
ZipEntry(ZipArchiveHandle handle,
::ZipEntry* zip_entry,
const std::string& entry_name)
: handle_(handle), zip_entry_(zip_entry), entry_name_(entry_name) {}
ZipArchiveHandle handle_;
::ZipEntry* const zip_entry_;
std::string const entry_name_;
friend class ZipArchive;
DISALLOW_COPY_AND_ASSIGN(ZipEntry);
};
class ZipArchive {
public:
// return new ZipArchive instance on success, null on error.
static ZipArchive* Open(const char* filename, std::string* error_msg);
static ZipArchive* OpenFromFd(int fd, const char* filename, std::string* error_msg);
ZipEntry* Find(const char* name, std::string* error_msg) const;
~ZipArchive();
private:
explicit ZipArchive(ZipArchiveHandle handle) : handle_(handle) {}
friend class ZipEntry;
ZipArchiveHandle handle_;
DISALLOW_COPY_AND_ASSIGN(ZipArchive);
};
} // namespace art
#endif // ART_LIBARTBASE_BASE_ZIP_ARCHIVE_H_
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