kc3-lang/gnulib/lib/copysignl.c

• Show log

  Commit

• Hash : 472322ae
  Author :
  Date : 2011-10-10T00:25:43
  

  copysignl: Simplify for platforms where 'long double' == 'double'.
  
  * lib/copysignl.c (copysignl) [HAVE_SAME_LONG_DOUBLE_AS_DOUBLE]: New
  alternative.
  * m4/copysignl.m4 (gl_FUNC_COPYSIGNL): Require gl_LONG_DOUBLE_VS_DOUBLE.
  Determine COPYSIGNL_LIBM according to HAVE_SAME_LONG_DOUBLE_AS_DOUBLE.
  * modules/copysignl (Depends-on): Add copysign. Update conditions.
  

Download

• lib/copysignl.c

• /* Copy sign into another 'long double' number.
     Copyright (C) 2011 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 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 <http://www.gnu.org/licenses/>.  */
  
  #include <config.h>
  
  /* Specification.  */
  #include <math.h>
  
  #if HAVE_SAME_LONG_DOUBLE_AS_DOUBLE
  
  long double
  copysignl (long double x, long double y)
  {
    return copysign (x, y);
  }
  
  #else
  
  long double
  copysignl (long double x, long double y)
  {
    return (signbit (x) != signbit (y) ? - x : x);
  }
  
  #endif
  

Download