29 lines
914 B
Ruby
29 lines
914 B
Ruby
require_relative "type"
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module Positioned
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def position
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raise "position accessed but not set at #{length} for #{self.inspect[0...500]}" if @position == nil
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@position
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end
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def set_position pos
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# resetting of position used to be error, but since relink and dynamic instruction size it is ok.
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# in measures (of 32)
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if @position != nil and ((@position - pos).abs > 32)
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raise "position set again #{pos}!=#{@position} for #{self}"
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end
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@position = pos
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end
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# objects only come in lengths of multiple of 8 words
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# but there is a constant overhead of 2 words, one for type, one for layout
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# and as we would have to subtract 1 to make it work without overhead, we now have to add 7
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def padded len
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a = 32 * (1 + (len + 7)/32 )
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#puts "#{a} for #{len}"
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a
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end
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def padded_words words
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padded(words*4) # 4 == word length, a constant waiting for a home
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end
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end
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