Goddess of Justice DB, the database used for storage on IzaroDFS
Não pode escolher mais do que 25 tópicos Os tópicos devem começar com uma letra ou um número, podem incluir traços ('-') e podem ter até 35 caracteres.
 
 
 

81 linhas
1.5 KiB

#pragma once
#include <stdint.h>
#include <stddef.h>
#include <array>
#include <algorithm>
#if __cplusplus <= 201703L
namespace _hidden{
enum class endian
{
#ifdef _WIN32
little = 0,
big = 1,
native = little
#else
little = __ORDER_LITTLE_ENDIAN__,
big = __ORDER_BIG_ENDIAN__,
native = __BYTE_ORDER__
#endif
};
}
namespace bitops{
using endian = _hidden::endian;
}
#else
#include <type_traits>
namespace bitops{
using endian = std::endian;
}
#endif
namespace bitops{
template<typename T, size_t sz = sizeof(T)>
constexpr std::array<uint8_t,sizeof(T)> swap_if_little_raw(T xsz)
{
std::array<uint8_t,sizeof(T)> ret = {0};
auto abstract = (std::array<uint8_t,sizeof(T)>*)&xsz;
if constexpr (endian::native == endian::little)
{
std::copy(abstract->rbegin(), abstract->rend(), ret.begin());
}
else
{
std::copy(abstract->begin(), abstract->end(), ret.begin());
}
return ret;
}
template<typename T, size_t sz = sizeof(T)>
constexpr T swap_if_little(T xsz)
{
auto tmp = swap_if_little_raw(xsz);
return *(T*)&tmp;
}
template<typename T>
struct [[gnu::packed]] regulated{
T internal = 0;
constexpr regulated(T value)
: internal{swap_if_little(value)}
{ }
constexpr void operator=(T value)
{
internal = swap_if_little(value);
}
template<typename Ta>
constexpr void operator+=(const Ta& v)
{
internal = swap_if_little(T(*this)+(T)v);
}
constexpr operator T() const {
return swap_if_little(internal);
}
};
}