as_bytes.hpp

Go to the documentation of this file.

//
// Created by yonggyulee on 2023/12/30.
//
 
#ifndef VCCC_SPAN_AS_BYTES_HPP
#define VCCC_SPAN_AS_BYTES_HPP
 
#include <cstddef>
 
#include "vccc/__core/byte.hpp"
#include "vccc/__span/dynamic_extent.hpp"
#include "vccc/__span/span.hpp"
 
namespace vccc {
namespace detail {
 
template<typename T, std::size_t N>
struct as_bytes_size : std::integral_constant<std::size_t, sizeof(T) * N> {};
template<typename T>
struct as_bytes_size<T, dynamic_extent> : std::integral_constant<std::size_t, dynamic_extent> {};
 
} // namespace detail
 
 
template<typename T, std::size_t N>
constexpr span<const byte, detail::as_bytes_size<T, N>::value>
as_bytes(span<T, N> s) noexcept {
  return span<const byte, detail::as_bytes_size<T, N>::value>(
      reinterpret_cast<const byte*>(s.data()),
      s.size_bytes()
  );
}
 
template<typename T, std::size_t N, std::enable_if_t<std::is_const<T>::value == false, int> = 0>
constexpr span<byte, detail::as_bytes_size<T, N>::value>
as_writable_bytes(span<T, N> s) noexcept {
  return span<byte, detail::as_bytes_size<T, N>::value>(
      reinterpret_cast<byte*>(s.data()),
      s.size_bytes()
  );
}
 
 
} // namespace vccc
 
#endif // VCCC_SPAN_AS_BYTES_HPP