Method: AppInfo::Helper::IOBlock#left_bytes_check

Defined in:
lib/app_info/helper/signatures.rb

#left_bytes_check(io, max_bytes, exception, message = nil, &block) ⇒ Object

Raises:

  • (exception) 


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# File 'lib/app_info/helper/signatures.rb', line 51

def left_bytes_check(io, max_bytes, exception, message = nil, &block)
  return if max_bytes.nil?

  left_bytes = io.size - io.pos
  return left_bytes if left_bytes.zero?

  message ||= if block_given?
                block.call(left_bytes)
              else
                "IO too short: #{offset} < #{max_bytes}"
              end

  raise exception, message if left_bytes < max_bytes

  left_bytes
end