Class: Ethereum::FastVM::CallData

Inherits:
Object
  • Object
show all
Defined in:
lib/ethereum/fast_vm/call_data.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(parent_memory, offset = 0, size = nil) ⇒ CallData

Returns a new instance of CallData.



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# File 'lib/ethereum/fast_vm/call_data.rb', line 10

def initialize(parent_memory, offset=0, size=nil)
  @data = parent_memory
  @offset = offset
  @size = size || @data.size
  @rlimit = @offset + @size
end

Instance Attribute Details

#size ⇒ Object (readonly)

Returns the value of attribute size.



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# File 'lib/ethereum/fast_vm/call_data.rb', line 8

def size
  @size
end

Instance Method Details

#extract32(i) ⇒ Object 



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# File 'lib/ethereum/fast_vm/call_data.rb', line 23

def extract32(i)
  return 0 if i >= @size

  right = [@offset+i+32, @rlimit].min
  o = @data.safe_slice(@offset+i...right)
  Utils.bytearray_to_int(o + [0]*(32-o.size))
end

#extract_all ⇒ Object 



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# File 'lib/ethereum/fast_vm/call_data.rb', line 17

def extract_all
  d = @data.safe_slice(@offset, @size)
  d += [0] * (@size - d.size)
  Utils.int_array_to_bytes(d)
end

#extract_copy(mem, memstart, datastart, size) ⇒ Object 



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# File 'lib/ethereum/fast_vm/call_data.rb', line 31

def extract_copy(mem, memstart, datastart, size)
  [size, @size-datastart].min.times do |i|
    mem[memstart+i] = @data[@offset + datastart + i]
  end

  ([0, [size, @size-datastart].min].max...size).each do |i|
    mem[memstart+i] = 0
  end
end