Method: CTAPI::Cardterminal#read

Defined in:
lib/ctapi.rb

#read(address = 0, size = nil) ⇒ Object

Attempts to read data of length size starting at address. If size is nil, an attempt is made to read the whole card memory.



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# File 'lib/ctapi.rb', line 168

def read(address = 0, size = nil)
  if size == nil
    if @card
      size = @card.memory_size - address
    else
      size = chunk_size
    end
  elsif @card and address + size > @card.memory_size
    size = @card.memory_size - address
  end
  return if size <= 0
  data = ''
  caught = catch(:break) do
    while size >= chunk_size
      d = read_chunk(address, chunk_size)
      if d
        data << d
        address += chunk_size
        size -= chunk_size
      else
        break :break  
      end
    end
  end
  if caught != :break and size > 0
    d = read_chunk(address, size) and data << d
  end
  data
end