Mercurial > hg > octave-lojdl > gnulib-hg
changeset 16437:3113323c37c6
Tests for module 'frexp-ieee'.
* modules/frexp-ieee-tests: New file.
* tests/test-frexp-ieee.c: New file.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Sun, 26 Feb 2012 15:09:38 +0100 |
parents | 8ecee6ba872c |
children | d852731d1451 |
files | ChangeLog modules/frexp-ieee-tests tests/test-frexp-ieee.c |
diffstat | 3 files changed, 89 insertions(+), 0 deletions(-) [+] |
line wrap: on
line diff
--- a/ChangeLog +++ b/ChangeLog @@ -1,5 +1,9 @@ 2012-02-26 Bruno Haible <bruno@clisp.org> + Tests for module 'frexp-ieee'. + * modules/frexp-ieee-tests: New file. + * tests/test-frexp-ieee.c: New file. + New module 'frexp-ieee'. * modules/frexp-ieee: New file.
new file mode 100644 --- /dev/null +++ b/modules/frexp-ieee-tests @@ -0,0 +1,18 @@ +Files: +tests/test-frexp-ieee.c +tests/minus-zero.h +tests/infinity.h +tests/nan.h +tests/macros.h + +Depends-on: +isnand-nolibm +float +signbit + +configure.ac: + +Makefile.am: +TESTS += test-frexp-ieee +check_PROGRAMS += test-frexp-ieee +test_frexp_ieee_LDADD = $(LDADD) @FREXP_LIBM@
new file mode 100644 --- /dev/null +++ b/tests/test-frexp-ieee.c @@ -0,0 +1,67 @@ +/* Test of splitting a double into fraction and mantissa. + Copyright (C) 2012 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/>. */ + +#include <config.h> + +#include <math.h> + +#include "isnand-nolibm.h" +#include "minus-zero.h" +#include "infinity.h" +#include "nan.h" +#include "macros.h" + +int +main () +{ + /* [MX] shaded specification in POSIX. */ + + /* NaN. */ + { + int exp = -9999; + double mantissa; + mantissa = frexp (NaNd (), &exp); + ASSERT (isnand (mantissa)); + } + + /* Signed zero. */ + { + int exp = -9999; + double mantissa; + mantissa = frexp (0.0, &exp); + ASSERT (mantissa == 0.0); + ASSERT (!signbit (mantissa)); + ASSERT (exp == 0); + } + { + int exp = -9999; + double mantissa; + mantissa = frexp (minus_zerod, &exp); + ASSERT (mantissa == 0.0); + ASSERT (!!signbit (mantissa) == !!signbit (minus_zerod)); + ASSERT (exp == 0); + } + + /* Infinity. */ + { + int exp = -9999; + double mantissa; + mantissa = frexp (Infinityd (), &exp); + ASSERT (mantissa == Infinityd ()); + } + + return 0; +}