Method: OpenC3::BinaryAccessor.get_check_overflow_ranges

Defined in:

lib/openc3/accessors/binary_accessor.rb

.get_check_overflow_ranges(bit_size, data_type) ⇒ Object

# File 'lib/openc3/accessors/binary_accessor.rb', line 799

def self.get_check_overflow_ranges(bit_size, data_type)
  min_value = 0 # Default for UINT cases

  case bit_size
  when 8
    hex_max_value = MAX_UINT8
    if data_type == :INT
      min_value = MIN_INT8
      max_value = MAX_INT8
    else
      max_value = MAX_UINT8
    end
  when 16
    hex_max_value = MAX_UINT16
    if data_type == :INT
      min_value = MIN_INT16
      max_value = MAX_INT16
    else
      max_value = MAX_UINT16
    end
  when 32
    hex_max_value = MAX_UINT32
    if data_type == :INT
      min_value = MIN_INT32
      max_value = MAX_INT32
    else
      max_value = MAX_UINT32
    end
  when 64
    hex_max_value = MAX_UINT64
    if data_type == :INT
      min_value = MIN_INT64
      max_value = MAX_INT64
    else
      max_value = MAX_UINT64
    end
  else # Bitfield
    if data_type == :INT
      # Note signed integers must allow up to the maximum unsigned value to support values given in hex
      if bit_size > 1
        max_value = 2**(bit_size - 1)
        # min_value = -(2 ** bit_size - 1)
        min_value = -max_value
        # max_value = (2 ** bit_size - 1) - 1
        max_value -= 1
        # hex_max_value = (2 ** bit_size) - 1
        hex_max_value = (2**bit_size) - 1
      else # 1-bit signed
        min_value = -1
        max_value = 1
        hex_max_value = 1
      end
    else
      max_value = (2**bit_size) - 1
      hex_max_value = max_value
    end
  end

  return min_value, max_value, hex_max_value
end