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/*
* Copyright (C) 2017 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_RUNTIME_CDEX_COMPACT_DEX_FILE_H_
#define ART_RUNTIME_CDEX_COMPACT_DEX_FILE_H_
#include "dex_file.h"
namespace art {
// CompactDex is a currently ART internal dex file format that aims to reduce storage/RAM usage.
class CompactDexFile : public DexFile {
public:
static constexpr uint8_t kDexMagic[kDexMagicSize] = { 'c', 'd', 'e', 'x' };
static constexpr uint8_t kDexMagicVersion[] = {'0', '0', '1', '\0'};
// Write the compact dex specific magic.
static void WriteMagic(uint8_t* magic);
// Write the current version, note that the input is the address of the magic.
static void WriteCurrentVersion(uint8_t* magic);
// Returns true if the byte string points to the magic value.
static bool IsMagicValid(const uint8_t* magic);
virtual bool IsMagicValid() const OVERRIDE;
// Returns true if the byte string after the magic is the correct value.
static bool IsVersionValid(const uint8_t* magic);
virtual bool IsVersionValid() const OVERRIDE;
bool IsCompactDexFile() const OVERRIDE {
return true;
}
private:
// Not supported yet.
CompactDexFile(const uint8_t* base,
size_t size,
const std::string& location,
uint32_t location_checksum,
const OatDexFile* oat_dex_file,
DexFileContainer* container)
: DexFile(base, size, location, location_checksum, oat_dex_file, container) {}
friend class DexFile;
friend class DexFileLoader;
DISALLOW_COPY_AND_ASSIGN(CompactDexFile);
};
} // namespace art
#endif // ART_RUNTIME_CDEX_COMPACT_DEX_FILE_H_