/* Wrapper to set errno for lgamma.

   Copyright (C) 2017-2018 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 Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 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

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

/* Only build wrappers from the templates for the types that define the macro

   below.  This macro is set in math-type-macros-<type>.h in sysdeps/generic

   for each floating-point type.  */

#if __USE_WRAPPER_TEMPLATE

# include <errno.h>

# include <fenv.h>

# include <math.h>

# include <math_private.h>

#define M_CALL_FUNC_X(x) x ## _r

#define M_CALL_FUNC(x) M_CALL_FUNC_X (x)

FLOAT

M_DECL_FUNC (__lgamma) (FLOAT x)

{

  FLOAT y = M_CALL_FUNC (M_SUF (__ieee754_lgamma)) (x, &__signgam);

  if (__glibc_unlikely (!isfinite (y)) && isfinite (x))

    /* Pole error: lgamma(integer x<0).  Or overflow.  */

    __set_errno (ERANGE);

  return y;

}

declare_mgen_alias (__lgamma, lgamma)

#endif /* __USE_WRAPPER_TEMPLATE.  */