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#pragma once
#include "binary-reader.hpp"
#include "compat/assert.hpp"
namespace floormat::Serialize {
template<string_input_iterator It>
template<char_sequence Seq>
constexpr binary_reader<It>::binary_reader(const Seq& seq) noexcept
: it{std::begin(seq)}, end{std::end(seq)}
{}
template<string_input_iterator It>
constexpr binary_reader<It>::binary_reader(It begin, It end) noexcept :
it{begin}, end{end}
{}
template<string_input_iterator It>
template<std::floating_point T>
constexpr value_u binary_reader<It>::read_u() noexcept
{
value_u buf;
static_assert(sizeof(T) <= sizeof(buf));
fm_assert(std::distance(it, end) >= sizeof(T));
num_bytes_read += sizeof(T);
for (int i = 0; i < sizeof(T); i++)
buf.bytes[i] = *it++;
return buf;
}
template<string_input_iterator It>
template<typename T>
T binary_reader<It>::read() noexcept
{
value_u buf = read_u<T>();
return *reinterpret_cast<T>(buf.bytes);
}
template<string_input_iterator It>
template<std::size_t N>
constexpr std::array<char, N> binary_reader<It>::read() noexcept
{
std::array<char, N> array;
if (std::is_constant_evaluated())
array = {};
fm_assert(N <= (std::size_t)std::distance(it, end));
num_bytes_read += N;
for (std::size_t i = 0; i < N; i++)
array[i] = *it++;
return array;
}
template<string_input_iterator It>
constexpr void binary_reader<It>::assert_end() noexcept
{
fm_assert(it == end);
}
template<string_input_iterator It>
template<integer T>
constexpr value_u binary_reader<It>::read_u() noexcept
{
value_u buf;
if (std::is_constant_evaluated())
for (std::size_t i = 0; i < std::size(buf.bytes); i++)
buf.bytes[i] = 0;
static_assert(sizeof(T) <= sizeof(buf));
fm_assert((std::ptrdiff_t)sizeof(T) <= std::distance(it, end));
num_bytes_read += sizeof(T);
if constexpr(std::endian::native == std::endian::big)
for (int i = sizeof(T) - 1; i >= 0; i--)
buf.bytes[i] = *it++;
else
for (std::size_t i = 0; i < sizeof(T); i++)
buf.bytes[i] = *it++;
return buf;
}
template<string_input_iterator It, serializable T>
binary_reader<It>& operator>>(binary_reader<It>& reader, T& x) noexcept
{
value_u u = reader.template read<T>();
x = *reinterpret_cast<T*>(&u.bytes[0]);
return reader;
}
} // namespace floormat::Serialize
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