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  1. /* @(#)s_pow10.c 5.1 93/09/24 */
  2. /* Modification from s_exp10.c Yaakov Selkowitz 2007.  */
  3.  
  4. /*
  5.  * ====================================================
  6.  * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
  7.  *
  8.  * Developed at SunPro, a Sun Microsystems, Inc. business.
  9.  * Permission to use, copy, modify, and distribute this
  10.  * software is freely granted, provided that this notice
  11.  * is preserved.
  12.  * ====================================================
  13.  */
  14.  
  15. /*
  16. FUNCTION
  17.         <<pow10>>, <<pow10f>>---exponential
  18. INDEX
  19.         pow10
  20. INDEX
  21.         pow10f
  22.  
  23. ANSI_SYNOPSIS
  24.         #include <math.h>
  25.         double pow10(double <[x]>);
  26.         float pow10f(float <[x]>);
  27.  
  28. TRAD_SYNOPSIS
  29.         #include <math.h>
  30.         double pow10(<[x]>);
  31.         double <[x]>;
  32.  
  33.         float pow10f(<[x]>);
  34.         float <[x]>;
  35.  
  36. DESCRIPTION
  37.         <<pow10>> and <<pow10f>> calculate 10 ^ <[x]>, that is,
  38.         @ifnottex
  39.         10 raised to the power <[x]>.
  40.         @end ifnottex
  41.         @tex
  42.         $10^x$
  43.         @end tex
  44.  
  45.         You can use the (non-ANSI) function <<matherr>> to specify
  46.         error handling for these functions.
  47.  
  48. RETURNS
  49.         On success, <<pow10>> and <<pow10f>> return the calculated value.
  50.         If the result underflows, the returned value is <<0>>.  If the
  51.         result overflows, the returned value is <<HUGE_VAL>>.  In
  52.         either case, <<errno>> is set to <<ERANGE>>.
  53.  
  54. PORTABILITY
  55.         <<pow10>> and <<pow10f>> are GNU extensions.
  56. */
  57.  
  58. /*
  59.  * wrapper pow10(x)
  60.  */
  61.  
  62. #undef pow10
  63. #include "fdlibm.h"
  64. #include <errno.h>
  65. #include <math.h>
  66.  
  67. #ifndef _DOUBLE_IS_32BITS
  68.  
  69. #ifdef __STDC__
  70.         double pow10(double x)          /* wrapper pow10 */
  71. #else
  72.         double pow10(x)                 /* wrapper pow10 */
  73.         double x;
  74. #endif
  75. {
  76.   return pow(10.0, x);
  77. }
  78.  
  79. #endif /* defined(_DOUBLE_IS_32BITS) */
  80.