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/* w_gammaf.c -- float version of w_gamma.c.
* Conversion to float by Ian Lance Taylor, Cygnus Support, ian@cygnus.com.
*/
/*
* ====================================================
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
*
* Developed at SunPro, a Sun Microsystems, Inc. business.
* Permission to use, copy, modify, and distribute this
* software is freely granted, provided that this notice
* is preserved.
* ====================================================
*/
#include <math.h>
#include <errno.h>
#ifdef __STDC__
float tgammaf(float x)
#else
float tgammaf(x)
float x;
#endif
{
float y;
int local_signgam;
y = gammaf_r(x,&local_signgam);
if (local_signgam < 0) y = -y;
#ifdef _IEEE_LIBM
return y;
#else
if(_LIB_VERSION == _IEEE_) return y;
if(!finitef(y)&&finitef(x)) {
if(floorf(x)==x&&x<=(float)0.0)
{
/* tgammaf pole */
errno = EDOM;
return HUGE_VAL;
}
else
{
/* tgammaf overflow */
errno = ERANGE;
return HUGE_VAL;
}
}
return y;
#endif
}
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