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  1. /* Copyright (C) 1994 DJ Delorie, see COPYING.DJ for details */
  2. /* s_ldexpf.c -- float version of s_ldexp.c.
  3.  * Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
  4.  */
  5.  
  6. /*
  7.  * ====================================================
  8.  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
  9.  *
  10.  * Developed at SunPro, a Sun Microsystems, Inc. business.
  11.  * Permission to use, copy, modify, and distribute this
  12.  * software is freely granted, provided that this notice
  13.  * is preserved.
  14.  * ====================================================
  15.  */
  16.  
  17. #if defined(LIBM_SCCS) && !defined(lint)
  18. static char rcsid[] = "$Id: s_ldexpf.c,v 1.1 1994/08/10 20:32:39 jtc Exp $";
  19. #endif
  20.  
  21. #include "math.h"
  22. #include "math_private.h"
  23. #include <errno.h>
  24.  
  25. #ifdef __STDC__
  26.         float ldexpf(float value, int exp)
  27. #else
  28.         float ldexpf(value, exp)
  29.         float value; int exp;
  30. #endif
  31. {
  32.         if(!finitef(value)||value==(float)0.0) return value;
  33.         value = scalbnf(value,exp);
  34.         if(!finitef(value)||value==(float)0.0) errno = ERANGE;
  35.         return value;
  36. }
  37.