s_catanf.c

glibc 库, 不仅可以学习使用库函数,还可以学习函数的具体实现,是提高功力的好资料

/* Return arc tangent of complex float value.
   Copyright (C) 2004, 2005 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, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#define __catanf __catanf_not_defined
#define catanf catanf_not_defined

#include <complex.h>
#include <math.h>

#undef __catanf
#undef catanf
#define __catanf internal_catanf

static _Complex float internal_catanf (_Complex float x);

#include <math/s_catanf.c>
#include "cfloat-compat.h"

#undef __catanf

c1_cfloat_rettype
__c1_catanf (c1_cfloat_decl (x))
{
  _Complex float r = internal_catanf (c1_cfloat_value (x));
  return c1_cfloat_return (r);
}

c2_cfloat_rettype
__c2_catanf (c2_cfloat_decl (x))
{
  _Complex float r = internal_catanf (c2_cfloat_value (x));
  return c2_cfloat_return (r);
}

cfloat_versions (catanf);