TheRock/rocm-libraries/projects/miopen/test/serialize.hpp

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#ifndef MIOPEN_GUARD_TEST_SERIALIZE_HPP
#define MIOPEN_GUARD_TEST_SERIALIZE_HPP

#include <miopen/rank.hpp>
#include <miopen/each_args.hpp>
#include <half/half.hpp>
#include <fstream>
#include <string>
#include <tuple>
#include <vector>

template <class T>
struct is_trivial_serializable : std::is_trivially_copy_constructible<T>
{
};

template <>
struct is_trivial_serializable<half_float::half> : std::true_type
{
};

template <class T>
std::enable_if_t<is_trivial_serializable<T>{}> serialize(std::ostream& os, const T& x)
{
    os.write(reinterpret_cast<const char*>(&x), sizeof(T));
}

template <class T>
auto serialize(std::ostream& os,
               const T& x) -> decltype(x.begin(), x.end(), T(x.begin(), x.end()), void())
{
    std::size_t n = std::distance(x.begin(), x.end());
    serialize(os, n);
    for(auto&& y : x)
        serialize(os, y);
}

template <class... Ts>
std::enable_if_t<not is_trivial_serializable<std::tuple<Ts...>>{}>
serialize(std::ostream& os, const std::tuple<Ts...>& t)
{
    miopen::unpack(
        [&](auto&&... xs) { miopen::each_args([&](auto&& x) { serialize(os, x); }, xs...); }, t);
}

template <class T>
std::enable_if_t<is_trivial_serializable<T>{}> serialize(std::istream& is, T& x)
{
    is.read(reinterpret_cast<char*>(&x), sizeof(T));
}

template <class T>
std::enable_if_t<is_trivial_serializable<T>{}> serialize(std::istream& is, std::vector<T>& x)
{
    std::size_t n;
    serialize(is, n);
    x.resize(n);
    is.read(reinterpret_cast<char*>(x.data()), sizeof(T) * n);
}

template <class T>
auto serialize(std::istream& is,
               T& x) -> decltype(x.begin(), x.end(), x.assign(x.begin(), x.end()), void())
{
    using value_type = std::decay_t<decltype(*x.begin())>;
    std::size_t n;
    serialize(is, n);
    std::vector<value_type> v;
    v.reserve(n);
    for(std::size_t i = 0; i < n; i++)
    {
        value_type y;
        serialize(is, y);
        v.push_back(y);
    }
    x.assign(v.begin(), v.end());
}

template <class... Ts>
std::enable_if_t<not is_trivial_serializable<std::tuple<Ts...>>{}>
serialize(std::istream& is,
          // cppcheck-suppress constParameter
          std::tuple<Ts...>& t)
{
    miopen::unpack(
        [&](auto&&... xs) { miopen::each_args([&](auto&& x) { serialize(is, x); }, xs...); }, t);
}

template <class T>
void load(std::string name, T& x)
{
    std::ifstream is{name.c_str()};
    serialize(is, x);
}

template <class T>
void save(std::string name, const T& x)
{
    std::ofstream os{name.c_str()};
    serialize(os, x);
}

#endif