fifo.hxx

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/*
 * Copyright (C) 2024-2026 David C. Manuelda (StormBytePP)
 *
 * This file is part of StormByte-Buffer.
 *
 * StormByte-Buffer is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * or later, as published by the Free Software Foundation.
 *
 * StormByte-Buffer 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with StormByte-Buffer. If not, see
 * <https://www.gnu.org/licenses/lgpl-3.0.html>.
 */
 
#pragma once
 
#include <StormByte/buffer/generic.hxx>
#include <StormByte/buffer/typedefs.hxx>
#include <StormByte/string.hxx>
 
#include <vector>
#include <span>
#include <string>
#include <sstream>
#include <utility>
 
namespace StormByte::Buffer {
    class STORMBYTE_BUFFER_PUBLIC FIFO: public ReadWrite {
        public:
            FIFO() noexcept = default;
 
            inline FIFO(const DataType& data) noexcept
                : m_buffer(data), m_position_offset(0) {}
 
            inline FIFO(DataType&& data) noexcept
                : m_buffer(std::move(data)), m_position_offset(0) {}
 
            template<Type::ByteInputRange R>
            requires (!Type::SameAs<R, DataType>)
            inline FIFO(const R& r) noexcept
                : m_buffer(DataConvert(r)), m_position_offset(0) {}
 
            template<Type::ByteInputRange Rr>
            inline FIFO(Rr&& r) noexcept
                : m_buffer(DataConvert(std::forward<Rr>(r))), m_position_offset(0) {}
 
            inline FIFO(std::string_view sv) noexcept
                : m_buffer(DataConvert(sv)), m_position_offset(0) {}
 
            inline FIFO(const char* s) noexcept
                : FIFO(s ? std::string_view(s) : std::string_view()) {}
 
            FIFO(const FIFO& other) noexcept;
 
            FIFO(FIFO&& other) noexcept;
 
            virtual ~FIFO() noexcept;
 
            FIFO& operator=(const FIFO& other);
 
            FIFO& operator=(FIFO&& other) noexcept;
 
            inline bool operator==(const FIFO& other) const noexcept {
                return m_buffer == other.m_buffer &&
                    m_position_offset == other.m_position_offset &&
                    m_closed == other.m_closed &&
                    m_error == other.m_error;
            }
 
            inline bool operator!=(const FIFO& other) const noexcept {
                return !(*this == other);
            }
 
            virtual std::size_t AvailableBytes() const noexcept;
 
            virtual const DataType& Data() const noexcept override;
 
            virtual bool Empty() const noexcept override;
 
            virtual bool EoF() const noexcept override;
 
            virtual bool IsReadable() const noexcept override;
 
            virtual bool IsWritable() const noexcept override;
 
            virtual std::size_t Size() const noexcept override;
 
            virtual void Clean() noexcept override;
 
            virtual void Clear() noexcept override;
 
            void Close() noexcept override;
 
            virtual bool Drop(const std::size_t& count) noexcept override;
 
            virtual void Seek(const std::ptrdiff_t& offset, const Position& mode) const noexcept override;
 
            void SetError() noexcept override;
 
            bool Extract(const std::size_t& count, DataType& outBuffer) noexcept override;
 
            bool Extract(const std::size_t& count, WriteOnly& outBuffer) noexcept override;
 
            using ReadOnly::Extract;
 
            void ExtractUntilEoF(DataType& outBuffer) noexcept override;
 
            void ExtractUntilEoF(WriteOnly& outBuffer) noexcept override;
 
            bool Read(const std::size_t& count, DataType& outBuffer) const noexcept override;
 
            bool Read(const std::size_t& count, WriteOnly& outBuffer) const noexcept override;
 
            using ReadOnly::Read;
 
            void ReadUntilEoF(DataType& outBuffer) const noexcept override;
 
            void ReadUntilEoF(WriteOnly& outBuffer) const noexcept override;
 
            bool Peek(const std::size_t& count, DataType& outBuffer) const noexcept override;
 
            bool Peek(const std::size_t& count, WriteOnly& outBuffer) const noexcept override;
 
            virtual std::string HexDump(const std::size_t& columns = 16,
                                        const std::size_t& byte_limit = 0) const noexcept;
 
            bool Write(const std::size_t& count, const DataType& data) noexcept override;
 
            bool Write(const std::size_t& count, DataType&& data) noexcept override;
 
            bool Write(const std::size_t& count, const ReadOnly& data) noexcept override;
 
            bool Write(const std::size_t& count, ReadOnly&& data) noexcept override;
 
            using WriteOnly::Write;
 
        protected:
            std::size_t AvailableBytesInternal() const noexcept;
 
            DataType m_buffer;                          
            mutable std::size_t m_position_offset {0};  
            bool m_closed {false};                      
            bool m_error {false};                       
 
            enum class Operation {
                Extract,    
                Read,       
                Peek        
            };
 
            static std::string FormatHexLines(std::span<const std::byte>& data,
                                            std::size_t start_offset,
                                            std::size_t columns) noexcept;
 
            virtual std::ostringstream HexDumpHeader() const noexcept;
 
            virtual bool ReadInternal(const std::size_t& count, DataType& outBuffer,
                                    const Operation& flag) noexcept;
 
            virtual bool ReadInternal(const std::size_t& count, WriteOnly& outBuffer,
                                    const Operation& flag) noexcept;
 
            virtual void ReadUntilEoFInternal(DataType& outBuffer, const Operation& flag) noexcept;
 
            virtual void ReadUntilEoFInternal(WriteOnly& outBuffer, const Operation& flag) noexcept;
 
            virtual bool WriteInternal(const std::size_t& count, const DataType& src) noexcept;
 
            virtual bool WriteInternal(const std::size_t& count, DataType&& src) noexcept;
 
            virtual bool WriteInternal(const std::size_t& count, const ReadOnly& src) noexcept;
 
            virtual bool WriteInternal(const std::size_t& count, ReadOnly&& src) noexcept;
 
    };
}