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/*
* ====================================================
* 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 "math_private.h"
#include <errno.h>
/* TODO: POSIX says:
*
* "If the integer expression (math_errhandling & MATH_ERRNO) is non-zero,
* then errno shall be set to [ERANGE]. If the integer expression
* (math_errhandling & MATH_ERREXCEPT) is non-zero, then the underflow
* floating-point exception shall be raised."
*
* *And it says the same about scalbn*! Thus these two functions
* are the same and can be just aliased.
*
* Currently, ldexp tries to be vaguely POSIX compliant while scalbn
* does not (it does not set ERRNO).
*/
double ldexp(double value, int _exp)
{
if (!isfinite(value) || value == 0.0)
return value;
value = scalbn(value, _exp);
if (!isfinite(value) || value == 0.0)
errno = ERANGE;
return value;
}
libm_hidden_def(ldexp)
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