function splitString(source, sep)
  sep = sep or " "
  elements = {}
  for str in string.gmatch(source, "([^"..sep.."]+)") do
    table.insert(elements, str)
  end
  return elements
end

function stripModname(name)
  parts = splitString(name, ":")
  if #parts ~= 2 then
    printError("modname split failed")
    printError(name)
  end
  return parts[2]
end

function len(table)
  l = 0
  for _, _ in pairs(table) do
    l = l + 1
  end
  return l
end