From bff635be1d45ce721f5e40c64f665a247b995133 Mon Sep 17 00:00:00 2001 From: Tor Lillqvist Date: Tue, 20 Jan 2015 16:24:14 +0200 Subject: Make the RAND() and RANDBETWEEN() Calc functions non-random when requested We don't want such a mode to affect other uses of randomness, though. Thus use a separate random number generator object for these two functions, and use a fixed seed for it if the SC_RAND_REPEATABLE environment variable is set. As RAND() is implemented in sc, and RANDBETWEEN() is implemented in scaddins, it was a bit hard to figure out where to add the new functions needed, without having to over-engineer things with UNO. (This functionality is totally Calc-specific, but neither sc nor scaddins has any public (non-UNO) API.) Caolan suggested the formula module, which seems like a good enough place to me. Change-Id: I4b0cb327392e51a18bce28478af91b0174d6b726 --- include/formula/random.hxx | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 include/formula/random.hxx (limited to 'include/formula') diff --git a/include/formula/random.hxx b/include/formula/random.hxx new file mode 100644 index 000000000000..d5d14f54ced9 --- /dev/null +++ b/include/formula/random.hxx @@ -0,0 +1,31 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + */ + +#ifndef INCLUDED_FORMULA_RANDOM_HXX +#define INCLUDED_FORMULA_RANDOM_HXX + +#include + +namespace formula +{ + +namespace rng +{ + +// These two functions obey the SC_RAND_REPEATABLE environment +// variable: If it is set, use a fixed seed. +double FORMULA_DLLPUBLIC fRandom(double a, double b); +sal_Int32 FORMULA_DLLPUBLIC nRandom(sal_Int32 a, sal_Int32 b); + +} // rng +} // formula + +#endif // INCLUDED_FORMULA_RANDOM_HXX + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ -- cgit