exception.hxx

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/*
 * Copyright (C) 2024-2026 David C. Manuelda (StormBytePP)
 *
 * This file is part of StormByte.
 *
 * StormByte 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 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. If not, see
 * <https://www.gnu.org/licenses/lgpl-3.0.html>.
 */
 
#pragma once
 
#include <StormByte/visibility.h>
#include <string>
#include <string_view>
#include <format>
 
namespace StormByte {
    struct Component {
        std::string_view name;  
 
        constexpr explicit Component(std::string_view name) noexcept: name(name) {}
    };
 
    class STORMBYTE_PUBLIC Exception {
    public:
        explicit Exception(const std::string& message);
 
        explicit Exception(std::string&& message);
 
        template <typename... Args>
        Exception(std::format_string<Args...> fmt, Args&&... args) {
            if constexpr (sizeof...(Args) == 0) {
                m_what = copy_str(std::string(fmt.get()).c_str());
            } else {
                std::string formatted_message = std::format(fmt, std::forward<Args>(args)...);
                m_what = copy_str(formatted_message.c_str());
            }
        }
 
        template <typename... Args>
        Exception(Component component, std::format_string<Args...> fmt, Args&&... args) {
            std::string formatted_message = std::format(fmt, std::forward<Args>(args)...);
            std::string full_message = "StormByte::" + std::string(component.name) + ": " + formatted_message;
            m_what = copy_str(full_message.c_str());
        }
 
        Exception(const Exception& e);
 
        Exception(Exception&& e) noexcept;
 
        virtual ~Exception() noexcept;
 
        Exception& operator=(const Exception& e);
 
        Exception& operator=(Exception&& e) noexcept;
 
        virtual const char*                                     what() const noexcept;
 
    private:
        const char* m_what;                                     
 
        const char*                                             copy_str(const char* str) noexcept;
 
        void                                                    free_str() noexcept;
    };
 
    class STORMBYTE_PUBLIC DeserializeError: public Exception {
        public:
            using Exception::Exception;
    };
 
    class STORMBYTE_PUBLIC OutOfBoundsError: public Exception {
        public:
            using Exception::Exception;
    };
 
    class STORMBYTE_PUBLIC Base64Error: public Exception {
        public:
            using Exception::Exception;
    };
 
    class STORMBYTE_PUBLIC UTF8Error: public Exception {
        public:
            using Exception::Exception;
    };
 
    class STORMBYTE_PUBLIC SystemError: public Exception {
        public:
            using Exception::Exception;
    };
}