Mercurial > gnulib
view lib/isfinite.c @ 40212:8da9577294da
unistr/*, uniconv/*: Fix undefined behaviour.
Reported by Jeffrey Walton <noloader@gmail.com>.
* lib/unistr/u-cpy.h (FUNC): Don't invoke memcpy with a zero size.
* lib/unistr/u-cpy-alloc.h (FUNC): Likewise.
* lib/uniconv/u8-conv-from-enc.c (u8_conv_from_encoding): Likewise.
* lib/uniconv/u8-conv-to-enc.c (u8_conv_to_encoding): Likewise.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Sat, 09 Mar 2019 00:01:47 +0100 |
parents | b06060465f09 |
children |
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/* Test for finite value (zero, subnormal, or normal, and not infinite or NaN). Copyright (C) 2007-2019 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 2, 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 Ben Pfaff <blp@gnu.org>, 2007. */ #include <config.h> #include "isnanf-nolibm.h" #include "isnand-nolibm.h" #include "isnanl-nolibm.h" /* The "cc" compiler on HP-UX 11.11, when optimizing, simplifies the test x - y == 0.0 to x == y, a simplification which is invalid when x and y are Infinity. Disable this optimization. */ #if defined __hpux && !defined __GNUC__ static float zerof; static double zerod; static long double zerol; #else # define zerof 0.f # define zerod 0. # define zerol 0.L #endif int gl_isfinitef (float x) { return !isnanf (x) && x - x == zerof; } int gl_isfinited (double x) { return !isnand (x) && x - x == zerod; } int gl_isfinitel (long double x) { return !isnanl (x) && x - x == zerol; }