xref: /developtools/hapsigner/hapsigntool_cpp/zip/include/zip_data_input.h

/*
 * Copyright (c) 2024-2024 Huawei Device Co., Ltd.
 * 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 SIGNATRUETOOLS_ZIP_DATA_INPUT_H
#define SIGNATRUETOOLS_ZIP_DATA_INPUT_H

#include <memory>

#include "byte_buffer.h"
#include "data_source.h"
#include "random_access_file_output.h"

namespace OHOS {
namespace SignatureTools {

class ZipDataInput {
public:
    virtual ~ZipDataInput()
    {
    }

    /**
     * Get how many bytes are contained in this data input.
     *
     * @return this data input size
     */
    virtual int64_t Size() = 0;

    /**
     * Copy the specified data block into the destination ZipDataOutput
     *
     * @param offset offset index at the ZipDataInput
     * @param size size of the data block
     * @param buffer the destination ZipDataOutput
     * @throws IOException when IO error occurred
     */
    virtual bool CopyTo(int64_t offset, int size, ByteBuffer& buffer) = 0;

    /**
     * Create a ByteBuffer which contain the specified data block from this ZipDataInput
     *
     * @param offset offset index at the ZipDataInput
     * @param size size of the data block
     * @return a ByteBuffer
     * @throws IOException when IO error occurred
     */
    virtual ByteBuffer CreateByteBuffer(int64_t offset, int size) = 0;

    /**
     * Create a new DataSource whose content is shared by this DataSource
     *
     * @param offset offset index at the DataSource
     * @param size size of the data block
     * @return new DataSource
     */
    virtual DataSource* Slice(int64_t offset, int64_t size) = 0;
};
} // namespace SignatureTools
} // namespace OHOS
#endif // SIGNATRUETOOLS_ZIP_DATA_INPUT_H