ldexp(3) [bsd man page]

FREXP(3)						     Library Functions Manual							  FREXP(3)

NAME

       frexp, ldexp, modf - split into mantissa and exponent

SYNOPSIS

       double frexp(value, eptr)
       double value;
       int *eptr;

       double ldexp(value, exp)
       double value;

       double modf(value, iptr)
       double value, *iptr;

DESCRIPTION

       Frexp  returns  the  mantissa of a double value as a double quantity, x, of magnitude less than 1 and stores an integer n such that value =
       x*2n indirectly through eptr.

       Ldexp returns the quantity value*2exp.

       Modf returns the positive fractional part of value and stores the integer part indirectly through iptr.

7th Edition							   May 15, 1985 							  FREXP(3)

modf(3M)						  Mathematical Library Functions						  modf(3M)

NAME

       modf, modff, modfl - decompose floating-point number

SYNOPSIS

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

       double modf(double x, double *iptr);

       float modff(float x, float *iptr);

       long double modfl(long double x, long double *iptr);

DESCRIPTION

       These  functions  break	the  argument x into integral and fractional parts, each of which has the same sign as the argument. It stores the
       integral part as a double for the modf() function, a float for the modff() function, or a long double for themodfl() function in the object
       pointed to by iptr.

RETURN VALUES

       Upon successful completion, these functions return the signed fractional part of x.

       If x is NaN, a NaN is returned and *iptr is set to NaN.

       If x is +-Inf, +-0 is returned and *iptr is set to +-Inf.

ERRORS

       No errors are defined.

USAGE

       These functions compute the function result and *iptr such that:

	 a = modf(x, &iptr) ;
	 x == a+*iptr ;

ATTRIBUTES

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

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

SEE ALSO

       frexp(3M), isnan(3M), ldexp(3M), attributes(5), standards(5)

SunOS 5.11							    12 Jul 2006 							  modf(3M)