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Class: Fiddle::Packer

Do not use. This class is for internal use only.
Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Instance Chain:
self, PackInfo
Inherits: Object
Defined in: ext/fiddle/lib/fiddle/pack.rb

Constant Summary

PackInfo - Included

ALIGN_MAP, PACK_MAP, SIZE_MAP

Class Method Summary

Instance Method Summary

PackInfo - Included

#align

Constructor Details

.new(types) ⇒ Packer

[ GitHub ] 

  


# File 'ext/fiddle/lib/fiddle/pack.rb', line 91



def initialize(types)
  parse_types(types)
end


  







Class Method Details



  

    .[](*types)  
  

  [ GitHub ]


  

  


# File 'ext/fiddle/lib/fiddle/pack.rb', line 87



def self.[](*types)
  new(types)
end


  







Instance Method Details



  

    #pack(ary)  
  

  [ GitHub ]


  

  


# File 'ext/fiddle/lib/fiddle/pack.rb', line 99



def pack(ary)
  case SIZEOF_VOIDP
  when SIZEOF_LONG
    ary.pack(@template)
  else
    if defined?(TYPE_LONG_LONG) and
      SIZEOF_VOIDP == SIZEOF_LONG_LONG
      ary.pack(@template)
    else
      raise(RuntimeError, "sizeof(void*)?")
    end
  end
end


  








  

    #parse_types(types)   (private)
  

  [ GitHub ]


  

  


# File 'ext/fiddle/lib/fiddle/pack.rb', line 129



def parse_types(types)
  @template = "".dup
  addr     = 0
  types.each{|t|
    orig_addr = addr
    if( t.is_a?(Array) )
      addr = align(orig_addr, ALIGN_MAP[TYPE_VOIDP])
    else
      addr = align(orig_addr, ALIGN_MAP[t])
    end
    d = addr - orig_addr
    if( d > 0 )
      @template << "x#{d}"
    end
    if( t.is_a?(Array) )
      @template << (PACK_MAP[t[0]] * t[1])
      addr += (SIZE_MAP[t[0]] * t[1])
    else
      @template << PACK_MAP[t]
      addr += SIZE_MAP[t]
    end
  }
  addr = align(addr, ALIGN_MAP[TYPE_VOIDP])
  @size = addr
end


  








  

    #size  
  

  [ GitHub ]


  

  


# File 'ext/fiddle/lib/fiddle/pack.rb', line 95



def size()
  @size
end


  








  

    #unpack(ary)  
  

  [ GitHub ]


  

  


# File 'ext/fiddle/lib/fiddle/pack.rb', line 113



def unpack(ary)
  case SIZEOF_VOIDP
  when SIZEOF_LONG
    ary.join().unpack(@template)
  else
    if defined?(TYPE_LONG_LONG) and
      SIZEOF_VOIDP == SIZEOF_LONG_LONG
      ary.join().unpack(@template)
    else
      raise(RuntimeError, "sizeof(void*)?")
    end
  end
end