##############################################################################
#
# Copyright (c) 2002 Zope Foundation and Contributors.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE
#
##############################################################################
limited_builtins = {}
def limited_range(iFirst, *args):
# limited range function from Martijn Pieters
RANGELIMIT = 1000
if not len(args):
iStart, iEnd, iStep = 0, iFirst, 1
elif len(args) == 1:
iStart, iEnd, iStep = iFirst, args[0], 1
elif len(args) == 2:
iStart, iEnd, iStep = iFirst, args[0], args[1]
else:
raise AttributeError('range() requires 1-3 int arguments')
if iStep == 0:
raise ValueError('zero step for range()')
iLen = int((iEnd - iStart) / iStep)
if iLen < 0:
iLen = 0
if iLen >= RANGELIMIT:
raise ValueError(
'To be created range() object would be to large, '
'in RestrictedPython we only allow {limit} '
'elements in a range.'.format(limit=str(RANGELIMIT)),
)
return range(iStart, iEnd, iStep)
limited_builtins['range'] = limited_range
def limited_list(seq):
if isinstance(seq, str):
raise TypeError('cannot convert string to list')
return list(seq)
limited_builtins['list'] = limited_list
def limited_tuple(seq):
if isinstance(seq, str):
raise TypeError('cannot convert string to tuple')
return tuple(seq)
limited_builtins['tuple'] = limited_tuple