MassBuilderSaveTool/src/BinaryIo/Writer.h

#pragma once

// MassBuilderSaveTool
// Copyright (C) 2021-2024 Guillaume Jacquemin
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

#include <cstdint>
#include <cstdio>

#include <Corrade/Containers/ArrayView.h>
#include <Corrade/Containers/GrowableArray.h>
#include <Corrade/Containers/StaticArray.h>
#include <Corrade/Containers/StringView.h>

using namespace Corrade;

namespace BinaryIo {

class Writer {
    public:
        explicit Writer(Containers::StringView filename);
        ~Writer();

        Writer(const Writer& other) = delete;
        Writer& operator=(const Writer& other) = delete;

        Writer(Writer&& other) = default;
        Writer& operator=(Writer&& other) = default;

        bool open();

        void closeFile();

        auto position() -> std::int64_t;

        auto array() const -> Containers::ArrayView<const char>;
        auto arrayPosition() const -> std::size_t;
        bool flushToFile();

        bool writeChar(char value);
        bool writeInt8(std::int8_t value);
        bool writeUint8(std::uint8_t value);
        bool writeInt16(std::int16_t value);
        bool writeUint16(std::uint16_t value);
        bool writeInt32(std::int32_t value);
        bool writeUint32(std::uint32_t value);
        bool writeInt64(std::int64_t value);
        bool writeUint64(std::uint64_t value);
        bool writeFloat(float value);
        bool writeDouble(double value);
        bool writeArray(Containers::ArrayView<const char> array);
        template<std::size_t size>
        bool writeString(const char(&str)[size]) {
            return writeArray({str, size - 1});
        }

        template<std::size_t S>
        bool writeStaticArray(Containers::StaticArrayView<S, const char> array) {
            return std::fwrite(array.data(), sizeof(char), S, _file) == S;
        }

        bool writeUEString(Containers::StringView str);

        template<typename T, typename U = std::conditional_t<std::is_trivially_copyable<T>::value, T, T&>>
        auto writeValueToArray(U value) -> std::size_t {
            Containers::ArrayView<T> view{&value, 1};
            return writeDataToArray(view);
        }

        auto writeUEStringToArray(Containers::StringView value) -> std::size_t;

        template<typename T>
        void writeValueToArrayAt(T& value, std::size_t position) {
            Containers::ArrayView<T> view{&value, 1};
            writeDataToArrayAt(view, position);
        }

        template<typename T>
        auto writeDataToArray(Containers::ArrayView<T> view) -> std::size_t {
            arrayAppend(_data, Containers::arrayCast<const char>(view));
            _index += sizeof(T) * view.size();
            return sizeof(T) * view.size();
        }

        template<typename T>
        void writeDataToArrayAt(Containers::ArrayView<T> view, std::size_t position) {
            auto casted_view = Containers::arrayCast<const char>(view);
            for(std::size_t i = 0; i < casted_view.size(); i++) {
                _data[position + i] = casted_view[i];
            }
        }

    private:
        FILE* _file = nullptr;

        Containers::Array<char> _data;
        std::size_t _index = 0;
};

}