Method: OpenC3::StructureItem#<=>

Defined in:
lib/openc3/packets/structure_item.rb,
ext/openc3/ext/structure/structure.c

#<=>(other_item) ⇒ Object

Comparison Operator based on bit_offset. This means that StructureItems with different names or bit sizes are equal if they have the same bit offset.



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# File 'lib/openc3/packets/structure_item.rb', line 220

def <=>(other_item)
  return nil unless other_item.kind_of?(StructureItem)

  other_bit_offset = other_item.bit_offset
  other_bit_size = other_item.bit_size

  # Handle same bit offset case
  if (@bit_offset == 0) && (other_bit_offset == 0)
    # Both bit_offsets are 0 so sort by bit_size
    # This allows derived items with bit_size of 0 to be listed first
    # Compare based on bit size then create index
    if @bit_size == other_bit_size
      if @create_index
        if @create_index <= other_item.create_index
          return -1
        else
          return 1
        end
      else
        return 0
      end
    elsif @bit_size < other_bit_size
      return -1
    else
      return 1
    end
  end

  # Handle different bit offsets
  if ((@bit_offset >= 0) && (other_bit_offset >= 0)) || ((@bit_offset < 0) && (other_bit_offset < 0))
    # Both Have Same Sign
    if @bit_offset == other_bit_offset
      if @create_index
        if @create_index <= other_item.create_index
          return -1
        else
          return 1
        end
      else
        return 0
      end
    elsif @bit_offset <= other_bit_offset
      return -1
    else
      return 1
    end
  else
    # Different Signs
    if @bit_offset == other_bit_offset
      if @create_index
        if @create_index < other_item.create_index
          return -1
        else
          return 1
        end
      else
        return 0
      end
    elsif @bit_offset < other_bit_offset
      return 1
    else
      return -1
    end
  end
end