module Roda::RodaPlugins::Base::RequestMethods

def _match_string(str)
  rp = @remaining_path
  length = str.length
  match = case rp.rindex(str, length)
  when nil
    # segment does not match, most common case
    return
  when 1
    # segment matches, check first character is /
    rp.getbyte(0) == 47
  else # must be 0
    # segment matches at first character, only a match if
    # empty string given and first character is /
    length == 0 && rp.getbyte(0) == 47
  end
  if match 
    length += 1
    case rp.getbyte(length)
    when 47
      # next character is /, update remaining path to rest of string
      @remaining_path = rp[length, 100000000]
    when nil
      # end of string, so remaining path is empty
      @remaining_path = ""
    # else
      # Any other value means this was partial segment match,
      # so we return nil in that case without updating the
      # remaining_path.  No need for explicit else clause.
    end
  end
end