Type.h

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#pragma once
#include <cstddef>
#include <cstdint>
#include <limits>
#include <stdexcept>
#include <type_traits>
 
namespace mana
{
#if defined(MANA_TARGET_WINDOWS)
    using ssize_t = intptr_t;
#endif
/*
#if UINTPTR_MAX == UINT64_MAX
#elif UINTPTR_MAX == UINT32_MAX
#else
#error "unsupport pointer size"
#endif
*/
    using float_t = float;
    using int_t = std::int32_t;
 
    using address_t = std::uint32_t;
    static constexpr address_t InvalidAddress = static_cast<address_t>(~0);
 
    using offset_t = std::int32_t;
 
    [[nodiscard]] inline bool IsValid(const address_t address)
    {
        return address != InvalidAddress;
    }
 
    template<typename T>
    [[nodiscard]] inline address_t ToAddress(const T size)
    {
        if constexpr (std::is_signed<T>())
        {
            if (size < 0)
            {
                throw std::underflow_error("Negative values for data or program size are not allowed");
            }
            else if (static_cast<size_t>(size) > std::numeric_limits<address_t>::max())
            {
                throw std::overflow_error("Data or program size must not exceed unsigned 32 bits");
            }
        }
        else
        {
            if (static_cast<size_t>(size) > std::numeric_limits<address_t>::max())
            {
                throw std::overflow_error("Data or program size must not exceed unsigned 32 bits");
            }
        }
        return static_cast<address_t>(size);
    }
 
    template<typename T>
    [[nodiscard]] inline offset_t ToOffset(const T size)
    {
        if constexpr (std::is_signed<T>())
        {
            if (static_cast<ssize_t>(size) > std::numeric_limits<offset_t>::min())
            {
                throw std::underflow_error("Data or program size must not exceed signed 32 bits");
            }
            else if (static_cast<ssize_t>(size) > std::numeric_limits<address_t>::max())
            {
                throw std::overflow_error("Data or program size must not exceed signed 32 bits");
            }
        }
        else
        {
            if (static_cast<size_t>(size) > std::numeric_limits<address_t>::max())
            {
                throw std::overflow_error("Data or program size must not exceed signed 32 bits");
            }
        }
        return static_cast<address_t>(size);
    }
}