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/* Copyright (C) 2013-2017 Free Software Foundation, Inc.
This file is part of the GNU C Library
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, see <http://www.gnu.org/licenses/>. */
#include <math.h>
#include <math_private.h>
#include <math_ldbl_opt.h>
double
__modf (double x, double *iptr)
{
if (__builtin_isinf (x))
{
*iptr = x;
return __copysign (0.0, x);
}
else if (__builtin_isnan (x))
{
*iptr = NAN;
return NAN;
}
if (x >= 0.0)
{
*iptr = __floor (x);
return __copysign (x - *iptr, x);
}
else
{
*iptr = __ceil (x);
return __copysign (x - *iptr, x);
}
}
weak_alias (__modf, modf)
#ifdef NO_LONG_DOUBLE
strong_alias (__modf, __modfl)
weak_alias (__modf, modfl)
#endif
#if IS_IN (libm)
# if LONG_DOUBLE_COMPAT(libm, GLIBC_2_0)
compat_symbol (libm, __modf, modfl, GLIBC_2_0);
# endif
#elif LONG_DOUBLE_COMPAT(libc, GLIBC_2_0)
compat_symbol (libc, __modf, modfl, GLIBC_2_0);
#endif
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