Mercurial > gnulib
view lib/sqrtl.c @ 40216:02ed6264c100
strfmon_l: Fix -fsanitize=address finding.
* lib/strfmon_l.c: Include <errno.h>, <stdbool.h>, <stdlib.h>,
<string.h>.
(MAX_ARGS): Renamed from MAX_ARG_WORDS.
(directive_t, directives_t): New types.
(fmon_parse): New function.
(rpl_strfmon_l): Don't call va_arg more often than needed for the
format string. Consume 'long double' arguments in places where the
format string indicates so.
* modules/strfmon_l (Depends-on): Add 'stdbool'.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Sat, 09 Mar 2019 23:30:40 +0100 |
parents | b06060465f09 |
children |
line wrap: on
line source
/* Emulation for sqrtl. Contributed by Paolo Bonzini Copyright 2002-2003, 2007, 2009-2019 Free Software Foundation, Inc. This file is part of gnulib. 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/>. */ #include <config.h> /* Specification. */ #include <math.h> #if HAVE_SAME_LONG_DOUBLE_AS_DOUBLE long double sqrtl (long double x) { return sqrt (x); } #else # include <float.h> /* A simple Newton-Raphson method. */ long double sqrtl (long double x) { long double delta, y; int exponent; /* Check for NaN */ if (isnanl (x)) return x; /* Check for negative numbers */ if (x < 0.0L) return (long double) sqrt (-1); /* Check for zero and infinites */ if (x + x == x) return x; frexpl (x, &exponent); y = ldexpl (x, -exponent / 2); do { delta = y; y = (y + x / y) * 0.5L; delta -= y; } while (delta != 0.0L); return y; } #endif