/*

 * Copyright (C) 2021 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 MMS_DECODE_BUFFER_H

#define MMS_DECODE_BUFFER_H



#include "mms_buffer.h"



namespace OHOS {

namespace Telephony {

class MmsDecodeBuffer : public MmsBuffer {

public:

    bool PeekOneByte(uint8_t &oneByte);

    bool GetOneByte(uint8_t &oneByte);

    bool IncreasePointer(uint32_t offset);

    bool DecreasePointer(uint32_t offset);

    void MarkPosition();

    void UnMarkPosition();



    bool DecodeIsString();

    bool DecodeShortLength(uint8_t &sValueLength);

    bool DecodeValueLengthReturnLen(uint32_t &valueLength, uint32_t &length);

    bool DecodeValueLength(uint32_t &valueLength);

    bool DecodeUintvar(uint32_t &uintVar, uint32_t &count);

    bool DecodeText(std::string &str, uint32_t &len);

    static bool CharIsToken(uint8_t oneByte);

    bool DecodeTokenText(std::string &str, uint32_t &len);

    bool DecodeQuotedText(std::string &str, uint32_t &len);

    bool DecodeShortInteger(uint8_t &sInteger);

    bool DecodeIsShortInt();

    bool DecodeLongInteger(uint64_t &lInteger);

    bool DecodeInteger(uint64_t &iInteger);

    bool DecodeIsValueLength();



private:

    static constexpr uint8_t EDN_S = 0;

    static constexpr uint8_t NARMAL_TEXT_MIN = 32;

    static constexpr uint8_t NARMAL_TEXT_MAX = 126;

    static constexpr uint8_t LONG_VALUE_LEN_MAX = 8;

};

} // namespace Telephony

} // namespace OHOS

#endif