memory_output_stream.h

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/*
 * Copyright 2024 MusicScience37 (Kenta Kabashima)
 *
 * 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.
 */
#pragma once
 
#include <cstddef>
 
#include "msgpack_light/binary.h"
#include "msgpack_light/details/static_memory_buffer_size.h"
#include "msgpack_light/output_stream.h"
 
namespace msgpack_light {

class memory_output_stream final : public output_stream {
public:
    memory_output_stream() { buffer_.reserve(initial_buffer_size); }

    void write(const unsigned char* data, std::size_t size) override {
        buffer_.append(data, size);
    }

    void clear() { buffer_.resize(0U); }

    [[nodiscard]] const unsigned char* data() const noexcept {
        return buffer_.data();
    }

    [[nodiscard]] std::size_t size() const noexcept { return buffer_.size(); }

    [[nodiscard]] const binary& as_binary() const { return buffer_; }
 
private:
    static constexpr std::size_t initial_buffer_size = 4096U;
 
    static_assert(initial_buffer_size > details::static_memory_buffer_size);

    binary buffer_{};
};
 
}  // namespace msgpack_light