80 lines
1.6 KiB
C
80 lines
1.6 KiB
C
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/* @(#)s_pow10.c 5.1 93/09/24 */
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/* Modification from s_exp10.c Yaakov Selkowitz 2007. */
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/*
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* ====================================================
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* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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*
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* Developed at SunPro, a Sun Microsystems, Inc. business.
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* Permission to use, copy, modify, and distribute this
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* software is freely granted, provided that this notice
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* is preserved.
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* ====================================================
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*/
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/*
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FUNCTION
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<<pow10>>, <<pow10f>>---exponential
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INDEX
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pow10
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INDEX
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pow10f
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ANSI_SYNOPSIS
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#include <math.h>
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double pow10(double <[x]>);
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float pow10f(float <[x]>);
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TRAD_SYNOPSIS
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#include <math.h>
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double pow10(<[x]>);
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double <[x]>;
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float pow10f(<[x]>);
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float <[x]>;
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DESCRIPTION
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<<pow10>> and <<pow10f>> calculate 10 ^ <[x]>, that is,
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@ifnottex
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10 raised to the power <[x]>.
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@end ifnottex
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@tex
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$10^x$
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@end tex
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You can use the (non-ANSI) function <<matherr>> to specify
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error handling for these functions.
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RETURNS
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On success, <<pow10>> and <<pow10f>> return the calculated value.
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If the result underflows, the returned value is <<0>>. If the
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result overflows, the returned value is <<HUGE_VAL>>. In
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either case, <<errno>> is set to <<ERANGE>>.
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PORTABILITY
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<<pow10>> and <<pow10f>> are GNU extensions.
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*/
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/*
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* wrapper pow10(x)
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*/
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#undef pow10
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#include "fdlibm.h"
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#include <errno.h>
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#include <math.h>
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#ifndef _DOUBLE_IS_32BITS
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#ifdef __STDC__
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double pow10(double x) /* wrapper pow10 */
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#else
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double pow10(x) /* wrapper pow10 */
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double x;
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#endif
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{
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return pow(10.0, x);
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}
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#endif /* defined(_DOUBLE_IS_32BITS) */
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