Class: DAta

Inherits:
Object show all
Defined in:
lib/simul/classes/data.rb

Overview

Don’t use class name Data because it’s a deprecated Ruby class and it generates warning at runtime

Constant Summary collapse

@@symbol_table = 
{}
@@current_address = 
0

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(symbol, value, wtype = Type::I32) ⇒ DAta

Returns a new instance of DAta.



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# File 'lib/simul/classes/data.rb', line 17

def initialize(symbol, value, wtype=Type::I32)
  @symbol = symbol
  @value = (value.is_a?(Array) ? value : [value])
  @wtype = wtype
  @address = @@current_address
  @@symbol_table[@symbol] = self
  size = self.update(@symbol, @value, @wtype)
  Log.debug "size after update #{size}"
  @@current_address += size
end

Instance Attribute Details

#address ⇒ Object (readonly)

Returns the value of attribute address.



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# File 'lib/simul/classes/data.rb', line 15

def address
  @address
end

#symbol ⇒ Object (readonly)

Returns the value of attribute symbol.



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# File 'lib/simul/classes/data.rb', line 15

def symbol
  @symbol
end

#value ⇒ Object (readonly)

Returns the value of attribute value.



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# File 'lib/simul/classes/data.rb', line 15

def value
  @value
end

#wtype ⇒ Object (readonly)

Returns the value of attribute wtype.



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# File 'lib/simul/classes/data.rb', line 15

def wtype
  @wtype
end

Class Method Details

.[](symbol) ⇒ Object 



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# File 'lib/simul/classes/data.rb', line 53

def self.[](symbol)
  raise "Unknown data symbol '#{symbol}'" unless self.has_symbol? symbol
  @@symbol_table[symbol].address
end

.[]=(symbol, value) ⇒ Object

Store string or integer in memory (note: integer are treated as I32)



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# File 'lib/simul/classes/data.rb', line 60

def self.[]=(symbol, value)
  if self.has_symbol? symbol
    self.update(symbol, value)
  else
    self.new(symbol, value)
  end
end

.address=(address) ⇒ Object 



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# File 'lib/simul/classes/data.rb', line 68

def self.address=(address)
  @@current_address = address
end

.align(n) ⇒ Object

Align current address to closest multiple of n by higher value



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# File 'lib/simul/classes/data.rb', line 74

def self.align(n)
  if (m = @@current_address % n) != 0
    @@current_address = (@@current_address - m) + n
  end
end

.has_symbol?(symbol) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/simul/classes/data.rb', line 49

def self.has_symbol?(symbol)
  @@symbol_table.has_key? symbol
end

Instance Method Details

#update(symbol, value, wtype) ⇒ Object 



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# File 'lib/simul/classes/data.rb', line 28

def update(symbol, value, wtype)
  Log.debug "updating data value #{value} at #{address} / #{wtype.size}"
  original_address = self.address
  new_address = address
  value.each do |elt|
    if elt.is_a? String
      elt.each_byte do |b| 
        Memory.store(new_address, b, 8)
        new_address += 1
      end
    elsif elt.is_a? Integer
      Memory.store(new_address, elt, wtype.size*8)
      new_address += wtype.size
      Log.debug "new _address : #{new_address}"
    else
      raise "Unknown Data type: #{value.class}"
    end
  end
  new_address - original_address
end