s_ldexp.c revision 6b15695578f07a3f72c4c9475c1a261a3021472a
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* The Original Code is Mozilla Communicator client code, released
* March 31, 1998.
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/* @(#)s_ldexp.c 1.3 95/01/18 */
/*
* ====================================================
* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
*
* Developed at SunSoft, a Sun Microsystems, Inc. business.
* Permission to use, copy, modify, and distribute this
* software is freely granted, provided that this notice
* is preserved.
* ====================================================
*/
#include "fdlibm.h"
#include <errno.h>
#ifdef __STDC__
double fd_ldexp(double value, int exp)
#else
double fd_ldexp(value, exp)
double value; int exp;
#endif
{
if(!fd_finite(value)||value==0.0) return value;
value = fd_scalbn(value,exp);
if(!fd_finite(value)||value==0.0) errno = ERANGE;
return value;
}