Class: Furnace::AVM2::ABC::Record

Inherits:
Binary::Record show all
Defined in:
lib/furnace-avm2/abc/primitives/record.rb

Instance Attribute Summary

Attributes inherited from Binary::Record

#root

Class Method Summary collapse

Methods inherited from Binary::Record

#byte_length, codegen, codegen_each, inherited, #inspect, method_missing, register, #to_hash, trace, trace_scope, trace_value

Class Method Details

.abc_array_of(name, type, options = {}) ⇒ Object 



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# File 'lib/furnace-avm2/abc/primitives/record.rb', line 3

def self.abc_array_of(name, type, options={})
  field_size, field_array = :"#{name}_count", options.delete(:plural) || :"#{name}s"
  klass = options.delete(:class)

  vuint30  field_size,  { :value   => lambda { send(field_array).count } }.merge(options)
  array    field_array, { :type    => type, :initial_length => field_size,
                          :options => { :class => klass } }.merge(options)
end

.flag(name, field, constant) ⇒ Object

Flags



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# File 'lib/furnace-avm2/abc/primitives/record.rb', line 139

def self.flag(name, field, constant)
  define_method(:"#{name}?") do
    instance_variable_get(:"@#{field}") & constant != 0
  end

  define_method(:"#{name}=") do |is_set|
    flags = instance_variable_get(:"@#{field}")

    if is_set
      instance_variable_set(:"@#{field}", flags | constant)
    else
      instance_variable_set(:"@#{field}", flags & ~constant)
    end
  end
end

.pool_array(pool, name, type, options = {}) ⇒ Object 



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# File 'lib/furnace-avm2/abc/primitives/record.rb', line 66

def self.pool_array(pool, name, type, options={})
  field, type_plural = :"#{name}_raw", options.delete(:plural) || :"#{type}s"

  array field, { :type => :vuint30 }.merge(options)

  if pool == :root
    define_method(name) do
      send(field).map do |element|
        root.send(type_plural)[element]
      end
    end
  elsif pool == :const
    define_method(name) do
      send(field).map do |element|
        if element == 0
          nil
        else
          root.constant_pool.send(type_plural)[element - 1]
        end
      end
    end
  end
end

.pool_array_of(pool, name, type, options = {}) ⇒ Object 



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# File 'lib/furnace-avm2/abc/primitives/record.rb', line 90

def self.pool_array_of(pool, name, type, options={})
  field_size, field_array = :"#{name}_count", options.delete(:plural) || :"#{name}s"

  vuint30          field_size,        { :value => lambda { send(field_array).count } }.merge(options)
  pool_array pool, field_array, type, { :initial_length => field_size }.merge(options)
end

.pool_ref(pool, name, type = name, options = {}) ⇒ Object

Pools



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# File 'lib/furnace-avm2/abc/primitives/record.rb', line 14

def self.pool_ref(pool, name, type=name, options={})
  field, array = :"#{name}_idx", options.delete(:plural) || :"#{type}s"

  vuint30 field, options

  if pool == :root
    define_method(name) do
      root.send(array)[send(field)]
    end
  elsif pool == :const
    define_method(name) do
      index = send(field)
      if index == 0
        nil
      else
        root.constant_pool.send(array)[index - 1]
      end
    end

    define_method(:"#{name}=") do |value|
      pool = root.constant_pool.send(array)
      if value.nil?
        send(:"#{field}=", 0)
      elsif index = pool.index(value)
        send(:"#{field}=", index + 1)
      else
        format_entry = ConstPoolInfo.format.find { |f| f[1] == array }
        if format_entry.nil?
          raise "cpool setter: [BUG] no such cpool field"
        end

        klass = nil
        case format_entry[2][:type]
        when :vstring; klass = String
        when :nested;  klass = format_entry[2][:class]
        end

        if klass.nil?
          raise "cpool setter: [BUG] no checker for type #{format_entry[2][:type]}"
        end

        if value.class != klass
          raise "cpool setter: trying to set wrong kind of value (#{value.class} instead of #{klass})"
        end

        pool.push value
        send(:"#{field}=", pool.index(value) + 1)
      end
    end
  end
end

.subset(name, array, selector) ⇒ Object

Subsetting



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# File 'lib/furnace-avm2/abc/primitives/record.rb', line 157

def self.subset(name, array, selector)
  define_method(:"#{name}") do
    send(array).select &selector
  end
end

.xlat_direct ⇒ Object

Xlat



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# File 'lib/furnace-avm2/abc/primitives/record.rb', line 109

def self.xlat_direct
  @xlat_direct  ||= const_get(:XlatTable).invert
end

.xlat_field(name) ⇒ Object 



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# File 'lib/furnace-avm2/abc/primitives/record.rb', line 117

def self.xlat_field(name)
  define_method(:"#{name}") do
    value = instance_variable_get :"@#{name}_raw"

    unless self.class.xlat_direct.has_key? value
      raise ArgumentError, "Unknown xlat value #{value} for #{self.class}"
    end

    self.class.xlat_direct[value]
  end

  define_method(:"#{name}=") do |new_value|
    unless self.class.xlat_inverse.has_key? new_value
      raise ArgumentError, "Unknown xlat identifier #{new_value} for #{self.class}"
    end

    instance_variable_set :"@#{name}_raw", self.class.xlat_inverse[new_value]
  end
end

.xlat_inverse ⇒ Object 



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# File 'lib/furnace-avm2/abc/primitives/record.rb', line 113

def self.xlat_inverse
  @xlat_inverse ||= const_get(:XlatTable)
end