opensolaris man page for scalbln

scalbln(3M)						  Mathematical Library Functions					       scalbln(3M)

NAME
       scalbln, scalblnf, scalblnl, scalbn, scalbnf, scalbnl - compute exponent using FLT_RADIX

SYNOPSIS
       c99 [ flag... ] file... -lm [ library... ]
       #include <math.h>

       double scalbln(double x, long n);

       float scalblnf(float x, long n);

       long double scalblnl(long double x, long n);

       double scalbn(double x, int n);

       float scalbnf(float x, int n);

       long double scalbnl(long double x, int n);

DESCRIPTION
       These functions compute x * FLT_RADIX^n efficiently, not normally by computing FLT_RADIX^n explicitly.

RETURN VALUES
       Upon successful completion, these functions return x * FLT_RADIX^n>.

       If  the result would cause overflow, a range error occurs and these functions return +-HUGE_VAL, +-HUGE_VALF, and +-HUGE_VALL (according to
       the sign of x) as appropriate for the return type of the function.

       If x is NaN, a NaN is returned.

       If x is +-0 or +-Inf, x is returned.

       If x is 0, x is returned.

ERRORS
       These functions will fail if:

       Range Error    The result overflows.

		      If the integer expression (math_errhandling & MATH_ERREXCEPT) is non-zero, then the  overflow  floating-point  exception	is
		      raised.

USAGE
       An  application	wanting  to  check  for  exceptions should call feclearexcept(FE_ALL_EXCEPT) before calling these functions. On return, if
       fetestexcept(FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW) is non-zero, an exception  has  been  raised.  An  application  should
       either examine the return value or check the floating point exception flags to detect exceptions.

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO
       feclearexcept(3M), fetestexcept(3M), math.h(3HEAD), scalb(3M), attributes(5), standards(5)

SunOS 5.11							    12 Jul 2006 						       scalbln(3M)