class ObjectFramework::Protobuf::Wire::Cursor

# File lib/object_framework/protobuf.rb, line 30
def initialize(bytes); @bytes, @position = bytes.b, 0; end

# File lib/object_framework/protobuf.rb, line 31
def done?; @position == @bytes.bytesize; end

# File lib/object_framework/protobuf.rb, line 51
def skip(wire)
  case wire
  when 0 then varint
  when 1 then take(8)
  when 2 then take(varint)
  when 5 then take(4)
  else raise InvalidInput, "Unsupported protobuf wire type"
  end
end

# File lib/object_framework/protobuf.rb, line 33
def take(count)
  raise InvalidInput, "Truncated protobuf field" if count.negative? || @position + count > @bytes.bytesize
  result = @bytes.byteslice(@position, count)
  @position += count
  result
end

# File lib/object_framework/protobuf.rb, line 40
def varint
  result = 0
  10.times do |index|
    byte = take(1).getbyte(0)
    raise InvalidInput, "Varint overflow" if index == 9 && byte > 1
    result |= (byte & 127) << (index * 7)
    return result if byte < 128
  end
  raise InvalidInput, "Varint overflow"
end