Mercurial > gnulib
view tests/test-log2.c @ 40214:452ab00796c7
Fix undefined behaviour.
* lib/bitrotate.h (rotl16, rotr16, rotl8, rotr8): Case x to
'unsigned int', to avoid shift operations on 'int'.
* lib/xmemdup0.c (xmemdup0): Don't invoke memcpy with a zero size.
* tests/test-count-leading-zeros.c (main): Use a random number that has
as many bits as TYPE, not only 2*15 or 2*31 bits.
* tests/test-count-trailing-zeros.c (main): Likewise.
* tests/test-count-one-bits.c (main): Likewise.
* tests/test-memmem.c: Don't include "null-ptr.h".
(main): Use zerosize_ptr() instead of null_ptr().
* modules/memmem-tests (Files): Remove tests/null-ptr.h.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Sat, 09 Mar 2019 20:32:25 +0100 |
parents | b06060465f09 |
children |
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/* Test of log2() 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>, 2012. */ #include <config.h> #include <math.h> #include "signature.h" SIGNATURE_CHECK (log2, double, (double)); #include <float.h> #include "minus-zero.h" #include "macros.h" #define DOUBLE double #define HUGEVAL HUGE_VAL #define L_(literal) literal #define MANT_DIG DBL_MANT_DIG #define MAX_EXP DBL_MAX_EXP #define MIN_EXP DBL_MIN_EXP #define MINUS_ZERO minus_zerod #define LOG2 log2 #define RANDOM randomd #include "test-log2.h" int main () { /* A particular value. */ x = 0.6; y = log2 (x); ASSERT (y >= -0.7369655942 && y <= -0.7369655941); test_function (); return 0; }