xref: /aosp_15_r20/frameworks/av/media/mtp/MtpStringBuffer.h (revision ec779b8e0859a360c3d303172224686826e6e0e1)

/*
 * Copyright (C) 2010 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 _MTP_STRING_BUFFER_H
#define _MTP_STRING_BUFFER_H

#include <log/log.h>
#include <stdint.h>
#include <string>
#include <string_view>

// Max Character number of a MTP String
#define MTP_STRING_MAX_CHARACTER_NUMBER             255

namespace android {

class MtpDataPacket;

// Represents a utf8 string, with a maximum of 255 characters
class MtpStringBuffer {

private:
    std::string     mString;

public:
                    MtpStringBuffer() {};
                    ~MtpStringBuffer() {};

    explicit        MtpStringBuffer(const char* src);
    explicit        MtpStringBuffer(const uint16_t* src);
                    MtpStringBuffer(const MtpStringBuffer& src);

    void            set(const char* src);
    void            set(const uint16_t* src);

    inline void     append(const char* other);
    inline void     append(MtpStringBuffer &other);

    bool            readFromPacket(MtpDataPacket* packet);
    void            writeToPacket(MtpDataPacket* packet) const;

    inline bool     isEmpty() const { return mString.empty(); }
    inline int      size() const { return mString.length(); }

    inline operator const char*() const { return mString.c_str(); }
    operator std::string_view() const { return mString; }
};

inline void MtpStringBuffer::append(const char* other) {
    mString += other;
}

inline void MtpStringBuffer::append(MtpStringBuffer &other) {
    mString += other.mString;
}

}; // namespace android

#endif // _MTP_STRING_BUFFER_H