cc/gapic/archive.h

/*
 * Copyright 2015, 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 GAPIC_ARCHIVE_H
#define GAPIC_ARCHIVE_H

#include "id.h"

#include <string>
#include <unordered_map>

#include <stdint.h>
#include <stdio.h>

namespace gapic {

class Archive {
public:
    // Opens or creates an archive at the specified location archiveName (full path).
    Archive(const std::string& archiveName);
    ~Archive();

    // Checks if the archive contains a record for the given id.
    bool contains(const std::string& id) const;

    // Reads the resource keyed by id into buffer if it exists and if its size matches.
    bool read(const std::string& id, void* buffer, uint32_t size);

    // Write a resource of size size keyed by id from buffer into the archive.
    bool write(const std::string& id, const void* buffer, uint32_t size);

protected:
    struct ArchiveRecord {
        uint64_t offset;
        uint32_t size;
    };

    FILE* mDataFile;
    FILE* mIndexFile;
    std::unordered_map<std::string, ArchiveRecord> mRecords;
};

} // end of namespace gapic

#endif // GAPIC_ARCHIVE_H