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Diffstat (limited to 'gnulib/tests/test-logb.c')
m--------- | gnulib | 0 | ||||
-rw-r--r-- | gnulib/tests/test-logb.c | 62 |
2 files changed, 62 insertions, 0 deletions
diff --git a/gnulib b/gnulib deleted file mode 160000 -Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1 diff --git a/gnulib/tests/test-logb.c b/gnulib/tests/test-logb.c new file mode 100644 index 0000000..e27abff --- /dev/null +++ b/gnulib/tests/test-logb.c @@ -0,0 +1,62 @@ +/* Test of logb() function. + Copyright (C) 2010-2011 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 <http://www.gnu.org/licenses/>. */ + +/* Written by Bruno Haible <bruno@clisp.org>, 2010. */ + +#include <config.h> + +#include <math.h> + +#include "signature.h" +SIGNATURE_CHECK (logb, double, (double)); + +#include <float.h> + +#include "macros.h" + +volatile double x; +double y; + +int +main () +{ + /* Some particular values. */ + x = 0.6; + y = logb (x); + ASSERT (y == -1.0); + + x = 1.2; + y = logb (x); + ASSERT (y == 0.0); + + x = 2.1; + y = logb (x); + ASSERT (y == 1.0); + + x = 3.9; + y = logb (x); + ASSERT (y == 1.0); + + x = 4.0; + y = logb (x); + ASSERT (y == (FLT_RADIX == 2 ? 2.0 : 1.0)); + + x = 0.25; + y = logb (x); + ASSERT (y == (FLT_RADIX == 2 ? -2.0 : -1.0)); + + return 0; +} |