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