44 lines
1.1 KiB
Ruby
44 lines
1.1 KiB
Ruby
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class Symbol
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include Positioned
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include Padding
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def has_layout?
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true
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end
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def get_layout
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l = Register.machine.space.classes[:Word].object_layout
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#puts "LL #{l.class}"
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l
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end
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def padded_length
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padded to_s.length + 4
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end
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# not the prettiest addition to the game, but it wasn't me who decided symbols are frozen in 2.x
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def cache_positions
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unless defined?(@@symbol_positions)
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@@symbol_positions = {}
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end
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@@symbol_positions
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end
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def position
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pos = cache_positions[self]
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if pos == nil
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str = "position accessed but not set, "
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str += "Machine has object=#{Register.machine.objects.has_key?(self.object_id)} "
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raise str + " for Symbol:#{self}"
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end
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pos
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end
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def 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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old = cache_positions[self]
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if old != nil and ((old - pos).abs > 20000)
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raise "position set again #{pos}!=#{old} for #{self}"
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end
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cache_positions[self] = pos
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end
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end
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