core/include/core/utils/Error.hpp

#ifndef CORE_ERROR_HPP
#define CORE_ERROR_HPP

#include "core/utils/Check.hpp"

namespace Core {
    struct Error {
        using Code = unsigned int;
        static_assert(sizeof(Code) >= 4, "error code too small");
        Code code;

        constexpr Error(Code c) : code(c) {
        }

        bool check() const {
            return code != 0;
        }

        bool contains(Error e) const {
            return code & e.code;
        }

        bool operator==(Error e) const {
            return code == e.code;
        }

        bool operator!=(Error e) const {
            return !(*this == e);
        }

        Error& operator|=(Error e) {
            code |= e.code;
            return *this;
        }

        Error operator|(Error e) const {
            e |= *this;
            return e;
        }
    };

    namespace ErrorCode {
        static constexpr Error NONE = 0;
        static constexpr Error NEGATIVE_ARGUMENT = 1 << 0;
        static constexpr Error CAPACITY_REACHED = 1 << 1;
        static constexpr Error BLOCKED_STDOUT = 1 << 2;
        static constexpr Error OUT_OF_MEMORY = 1 << 3;
        static constexpr Error INVALID_CHAR = 1 << 4;
        static constexpr Error NOT_FOUND = 1 << 5;
        static constexpr Error INVALID_STATE = 1 << 6;
        static constexpr Error INVALID_INDEX = 1 << 7;
        static constexpr Error INVALID_ARGUMENT = 1 << 8;
        static constexpr Error TIME_NOT_AVAILABLE = 1 << 9;
        static constexpr Error SLEEP_INTERRUPTED = 1 << 10;
        static constexpr Error THREAD_ERROR = 1 << 11;
        static constexpr Error MUTEX_ERROR = 1 << 12;
        static constexpr Error EXISTING_KEY = 1 << 13;
        static constexpr Error CANNOT_OPEN_FILE = 1 << 14;
        static constexpr Error END_OF_FILE = 1 << 15;
    }

    CError toString(Error e, char* buffer, int size);

    inline bool checkError(Error& storage, Error e) {
        return (storage = e).check();
    }

#define CORE_RETURN_ERROR(checked)                                             \
    {                                                                          \
        Core::Error error = Core::ErrorCode::NONE;                             \
        if(checkError(error, checked)) [[unlikely]] {                          \
            return error;                                                      \
        }                                                                      \
    }
}

#endif