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# encoding: ascii-8bit
# Copyright 2014 Ball Aerospace & Technologies Corp.
# All Rights Reserved.
#
# This program is free software; you can modify and/or redistribute it
# under the terms of the GNU General Public License
# as published by the Free Software Foundation; version 3 with
# attribution addendums as found in the LICENSE.txt
module Cosmos
# Performs a general conversion via the implementation of the call method
class Conversion
# @return [Symbol] The converted data type. Must be one of
# {Cosmos::StructureItem#data_type}
attr_reader :converted_type
# @return [Integer] The size in bits of the converted value
attr_reader :converted_bit_size
# @return [Integer] The size in bits of the converted array value
attr_reader :converted_array_size
# Create a new conversion
def initialize
@converted_type = nil
@converted_bit_size = nil
@converted_array_size = nil
end
# Perform the conversion on the value.
#
# @param value [Object] The value to convert
# @param packet [Packet] The packet which contains the value. This can
# be useful to reach into the packet and use other values in the
# conversion.
# @param buffer [String] The packet buffer
# @return The converted value
def call(value, packet, buffer)
raise "call method must be defined by subclass"
end
# @return [String] The conversion class
def to_s
self.class.to_s.split('::')[-1]
end
# @param read_or_write [String] Either 'READ' or 'WRITE'
# @return [String] Config fragment for this conversion
def to_config(read_or_write)
" #{read_or_write}_CONVERSION #{self.class.name.class_name_to_filename}\n"
end
end
end