Mercurial > gnulib
view tests/test-nextafter.c @ 40221:8c1a17df67e0
tests: Prepare for using valgrind.
tests/*.sh: Invoke all test programs through ${CHECKER}.
tests/*/*.sh: Likewise.
author | Bruno Haible <bruno@clisp.org> |
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date | Sun, 10 Mar 2019 11:32:11 +0100 |
parents | b06060465f09 |
children |
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/* Test of nextafter() function. Copyright (C) 2010-2019 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>. */ /* Written by Bruno Haible <bruno@clisp.org>, 2010. */ #include <config.h> #include <math.h> #include "signature.h" SIGNATURE_CHECK (nextafter, double, (double, double)); #include "macros.h" volatile double x; double y; int main () { /* A particular value. */ x = 1.628947572; /* Towards 0. */ y = nextafter (x, 0); ASSERT (y < x); ASSERT (y > 1.628947571); y = nextafter (y, x + x); ASSERT (y == x); /* Towards infinity. */ y = nextafter (x, x + x); ASSERT (y > x); ASSERT (y < 1.628947573); y = nextafter (y, 0); ASSERT (y == x); /* Towards itself. */ y = nextafter (x, x); ASSERT (y == x); return 0; }