import os import tuned.logs from tuned.utils.commands import commands log = tuned.logs.get() class Function(object): """ Built-in function """ def __init__(self, name, nargs_max, nargs_min = None): self._name = name self._nargs_max = nargs_max self._nargs_min = nargs_min self._cmd = commands() # checks arguments # nargs_max - maximal number of arguments, there mustn't be more arguments, # if nargs_max is 0, number of arguments is unlimited # nargs_min - minimal number of arguments, if not None there must # be the same number of arguments or more @classmethod def _check_args(cls, args, nargs_max, nargs_min = None): if args is None or nargs_max is None: return False la = len(args) return (nargs_max == 0 or nargs_max >= la) and (nargs_min is None or nargs_min <= la) def execute(self, args): if self._check_args(args, self._nargs_max, self._nargs_min): return True else: log.error("invalid number of arguments for builtin function '%s'" % self._name) return False