json-validator/include/jvalidate/detail/number.h

#pragma once

#include <cmath>
#include <limits>

namespace jvalidate::detail {
inline bool is_json_integer(double number) { return std::floor(number) == number; }

inline bool fits_in_integer(double number) {
  static constexpr double g_int_max = std::numeric_limits<int64_t>::max();
  static constexpr double g_int_min = std::numeric_limits<int64_t>::min();
  return is_json_integer(number) && number <= g_int_max && number >= g_int_min;
}

inline bool fits_in_integer(uint64_t number) { return (number & 0x8000'0000'0000'0000) == 0; }
}