# -*- coding: utf-8 -*-
# Wendelin.core | Calculation helpers
# Copyright (C) 2015  Nexedi SA and Contributors.
#                     Kirill Smelkov <kirr@nexedi.com>
#
# This program is free software: you can Use, Study, Modify and Redistribute
# it under the terms of the GNU General Public License version 3, or (at your
# option) any later version, as published by the Free Software Foundation.
#
# You can also Link and Combine this program with other software covered by
# the terms of any of the Free Software licenses or any of the Open Source
# Initiative approved licenses and Convey the resulting work. Corresponding
# source of such a combination shall include the source code for all other
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# This program is distributed WITHOUT ANY WARRANTY; without even the implied
# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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# See https://www.nexedi.com/licensing for rationale and options.


# like multiply.reduce() but does not overflow
# ( in other words `mul` is for * the same as `sum` is for + )
def mul(args, start=1):
    v = start
    for x in args:
        v *= x
    return v
