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#include "magnum-vector.hpp"
#include "compat/format.hpp"
#include "compat/exception.hpp"
#include <Magnum/Math/Vector.h>
#include <cstdio>
#include <string>
#include <nlohmann/json.hpp>
namespace floormat::Serialize {
namespace {
[[noreturn]] void throw_failed_to_parse_vector2(const std::string& str)
{
fm_throw("failed to parse Vector2 '{}'"_cf, str);
}
[[noreturn]] void throw_vector2_overflow(const std::string& str)
{
fm_throw("numeric overflow in Vector2 '{}'"_cf, str);
}
using nlohmann::json;
using Math::Vector;
using Math::Vector2;
using Math::Vector3;
using Math::Vector4;
template<size_t N, typename T>
struct vec_serializer
{
static void to_json(json& j, Math::Vector<N, T> val)
{
std::array<T, N> array{};
for (auto i = 0uz; i < N; i++)
array[i] = val[i];
using nlohmann::to_json;
to_json(j, array);
}
static void from_json(const json& j, Math::Vector<N, T>& val)
{
std::array<T, N> array{};
using nlohmann::from_json;
from_json(j, array);
for (auto i = 0uz; i < N; i++)
val[i] = array[i];
}
};
template<typename T>
struct vec2_serializer
{
static void to_json(json& j, Vector<2, T> val)
{
char buf[64];
using type = std::conditional_t<std::is_signed_v<T>, intmax_t, uintmax_t>;
constexpr auto format_string = std::is_signed_v<T> ? "%jd x %jd" : "%ju x %ju";
snprintf(buf, sizeof(buf), format_string, (type)val[0], (type)val[1]);
j = buf;
}
static void from_json(const json& j, Vector<2, T>& val)
{
using namespace floormat;
std::string str = j;
using type = std::conditional_t<std::is_signed_v<T>, intmax_t, uintmax_t>;
constexpr auto format_string = std::is_signed_v<T> ? "%jd x %jd%n" : "%ju x %ju%n";
type x = 0, y = 0;
int n = 0;
int ret = std::sscanf(str.data(), format_string, &x, &y, &n);
if (ret != 2 || (size_t)n != str.size() || x != (T)x || y != (T)y)
throw_failed_to_parse_vector2(str);
if constexpr(sizeof(T) < sizeof(type))
if (x != (type)(T)x || y != (type)(T)y)
throw_vector2_overflow(str);
val = { (T)x, (T)y };
}
};
} // namespace
} // namespace floormat::Serialize
namespace nlohmann {
using floormat::Serialize::vec_serializer;
using floormat::Serialize::vec2_serializer;
using floormat::size_t;
using namespace Magnum::Math;
template<size_t N, typename T>
void adl_serializer<Vector<N, T>>::to_json(json& j, Vector<N, T> val)
{
if constexpr(N != 2 || !std::is_integral_v<T>)
vec_serializer<N, T>::to_json(j, val);
else
vec2_serializer<T>::to_json(j, val);
}
template<size_t N, typename T>
void adl_serializer<Vector<N, T>>::from_json(const json& j, Vector<N, T>& val)
{
if constexpr(N != 2 || !std::is_integral_v<T>)
vec_serializer<N, T>::from_json(j, val);
else
vec2_serializer<T>::from_json(j, val);
}
#define FM_INST_VEC_SERIALIZER_1(N, Type) \
template struct adl_serializer< Vector<N, Type>>; \
template struct adl_serializer< Vector##N<Type>>
#define FM_INST_VEC_SERIALIZER(Type) \
FM_INST_VEC_SERIALIZER_1(Type, float); \
FM_INST_VEC_SERIALIZER_1(Type, double); \
FM_INST_VEC_SERIALIZER_1(Type, int8_t); \
FM_INST_VEC_SERIALIZER_1(Type, int16_t); \
FM_INST_VEC_SERIALIZER_1(Type, int32_t); \
FM_INST_VEC_SERIALIZER_1(Type, int64_t); \
FM_INST_VEC_SERIALIZER_1(Type, uint8_t); \
FM_INST_VEC_SERIALIZER_1(Type, uint16_t); \
FM_INST_VEC_SERIALIZER_1(Type, uint32_t); \
FM_INST_VEC_SERIALIZER_1(Type, uint64_t)
FM_INST_VEC_SERIALIZER(2);
FM_INST_VEC_SERIALIZER(3);
FM_INST_VEC_SERIALIZER(4);
} // namespace nlohmann
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