Function decimal_from_float32

cpp/fory/serialization/compatible_scalar.cc:611–628

}

bool decimal_from_float32(float value, Decimal &out) {
  uint32_t bits = 0;
  std::memcpy(&bits, &value, sizeof(bits));
  const bool negative = (bits & 0x80000000u) != 0;
  const uint32_t exp_bits = (bits >> 23) & 0xffu;
  uint32_t frac = bits & 0x7fffffu;
  if (exp_bits == 0 && frac == 0) {
    out = Decimal();
    return true;
  }
  uint64_t significand = frac;
  int32_t exponent = -149;
  if (exp_bits != 0) {
    significand |= uint64_t{1} << 23;
    exponent = static_cast<int32_t>(exp_bits) - 127 - 23;
  }
  return decimal_from_float_bits(negative, significand, exponent, out);
}

bool decimal_from_float64(double value, Decimal &out) {
  uint64_t bits = 0;