92 lines
2.6 KiB
Ruby
92 lines
2.6 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 self.offset
|
|
2 * 4 # size of type (2, type+next) * word_size (4)
|
|
end
|
|
|
|
def initialize(total_size)
|
|
super()
|
|
extend_to(total_size )
|
|
#puts "Init with #{total_size} for #{object_id}"
|
|
(0 ..(data_length)).each{ |index| set_word(index , 0) }
|
|
end
|
|
def extend_to(total_size)
|
|
return unless total_size > self.data_length
|
|
extend_one() unless @next
|
|
@next.extend_to(total_size - data_length)
|
|
end
|
|
def extend_one()
|
|
@next = BinaryCode.new(1)
|
|
if Risc::Position.set?(self)
|
|
Risc::Position.log.debug "extending one in #{self}"
|
|
my_pos = Risc::Position.get(self)
|
|
Risc::Position.reset(my_pos , my_pos.at)
|
|
end
|
|
end
|
|
|
|
def each( &block )
|
|
block.call( self )
|
|
@next.each( &block ) if @next
|
|
end
|
|
|
|
def to_s
|
|
"BinaryCode #{Risc::Position.set?(self) ? Risc::Position.get(self): self.object_id.to_s(16)}"
|
|
end
|
|
|
|
def each_word
|
|
index = 0
|
|
while( index < data_length)
|
|
yield get_word(index)
|
|
index += 1
|
|
end
|
|
end
|
|
#16 - 2 -1 , two instance variables and one for the jump
|
|
def data_length
|
|
13
|
|
end
|
|
def byte_length
|
|
4*data_length
|
|
end
|
|
def set_word(index , word)
|
|
raise "invalid index #{index}" if index < 0
|
|
if index > data_length
|
|
#raise "invalid index #{index}" unless @next
|
|
extend_to( index )
|
|
@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 < 0
|
|
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 #{self.object_id}:#{@next.object_id}"
|
|
return @next.set_char( index - byte_length , char )
|
|
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
|