Mercurial > gnulib
view tests/infinity.h @ 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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/* Macros for infinity. Copyright (C) 2011-2019 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/>. */ /* Infinityf () returns a 'float' +Infinity. */ /* The Microsoft MSVC 9 compiler chokes on the expression 1.0f / 0.0f. The IBM XL C compiler on z/OS complains. PGI 16.10 complains. */ #if defined _MSC_VER || (defined __MVS__ && defined __IBMC__) || defined __PGI static float Infinityf () { static float zero = 0.0f; return 1.0f / zero; } #else # define Infinityf() (1.0f / 0.0f) #endif /* Infinityd () returns a 'double' +Infinity. */ /* The Microsoft MSVC 9 compiler chokes on the expression 1.0 / 0.0. The IBM XL C compiler on z/OS complains. PGI 16.10 complains. */ #if defined _MSC_VER || (defined __MVS__ && defined __IBMC__) || defined __PGI static double Infinityd () { static double zero = 0.0; return 1.0 / zero; } #else # define Infinityd() (1.0 / 0.0) #endif /* Infinityl () returns a 'long double' +Infinity. */ /* The Microsoft MSVC 9 compiler chokes on the expression 1.0L / 0.0L. The IBM XL C compiler on z/OS complains. PGI 16.10 complains. */ #if defined _MSC_VER || (defined __MVS__ && defined __IBMC__) || defined __PGI static long double Infinityl () { static long double zero = 0.0L; return 1.0L / zero; } #else # define Infinityl() (1.0L / 0.0L) #endif