62 lines
1.8 KiB
Ruby
62 lines
1.8 KiB
Ruby
module Parfait
|
|
|
|
# A typed method object is a description of the method, it's name etc
|
|
#
|
|
# But the code that the method represents, the binary, is held as an array
|
|
# in these. As Objects are fixed size (this one 16 words), we use linked list
|
|
# and as the last code of each link is a jump to the next link.
|
|
#
|
|
class BinaryCode < Data16
|
|
attr_reader :next
|
|
|
|
def initialize(total_size)
|
|
super()
|
|
if total_size > self.data_length
|
|
@next = BinaryCode.new(total_size - data_length) #one for the jump
|
|
end
|
|
#puts "Init with #{total_size} for #{object_id}"
|
|
(1..(data_length+1)).each{ |index| set_word(index , 0) }
|
|
end
|
|
def to_s
|
|
"BinaryCode #{}"
|
|
end
|
|
def data_length
|
|
13
|
|
end
|
|
def byte_length
|
|
4*data_length
|
|
end
|
|
def set_word(index , word)
|
|
raise "invalid index #{index}" if index < 1
|
|
if index > data_length + 1
|
|
raise "invalid index #{index}" unless @next
|
|
@next.set_word( index - data_length , word)
|
|
end
|
|
set_internal_word(index + 2 , word)
|
|
end
|
|
def get_word(index)
|
|
raise "invalid index #{index}" if index < 1
|
|
if index > data_length + 1
|
|
raise "invalid index #{index}" unless @next
|
|
return @next.get_word( index - data_length)
|
|
end
|
|
get_internal_word(index + 2)
|
|
end
|
|
def set_char(index , char)
|
|
if index >= byte_length
|
|
puts "Pass it on #{index} for #{object_id}"
|
|
return @next.set_char( char , index - byte_length)
|
|
end
|
|
word_index = (index - 1) / 4 + 2
|
|
old = get_internal_word( word_index )
|
|
old = old && char << ((index-1)%4)
|
|
set_internal_word(word_index , char)
|
|
end
|
|
def total_byte_length(start = 0 )
|
|
start += self.byte_length
|
|
return start unless self.next
|
|
self.next.total_byte_length(start)
|
|
end
|
|
end
|
|
end
|