diff options
| author | Tor Lillqvist <tml@collabora.com> | 2015-01-20 16:24:14 +0200 |
|---|---|---|
| committer | Tor Lillqvist <tml@collabora.com> | 2015-01-20 18:12:38 +0200 |
| commit | bff635be1d45ce721f5e40c64f665a247b995133 (patch) | |
| tree | 5f3709f766cd02a1cdc4b1f2306bba975c7c8edd /include | |
| parent | f1cf63c223fd7b4771df687ae9fe37faeccdb8fe (diff) | |
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
Diffstat (limited to 'include')
| -rw-r--r-- | include/formula/random.hxx | 31 |
1 files changed, 31 insertions, 0 deletions
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 <formula/formuladllapi.h> + +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: */ |