opensolaris man page for lrintf

lrint(3M)						  Mathematical Library Functions						 lrint(3M)

NAME
       lrint, lrintf, lrintl - round to nearest integer value using current rounding direction

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

       long lrint(double x);

       long lrintf(float x);

       long lrintl(long double x);

DESCRIPTION
       These functions round their argument to the nearest integer value, rounding according to the current rounding direction.

RETURN VALUES
	Upon successful completion, these functions return the rounded integer value.

       If x is NaN, a domain error occurs and an unspecified value is returned.

       If x is +Inf, a domain error occurs and an unspecified value is returned.

       If x is -Inf, a domain error occurs and an unspecified value is returned.

       If the correct value is positive and too large to represent as a long, a domain error occurs and an unspecified value is returned.

       If the correct value is negative and too large to represent as a long, a domain error occurs and an unspecified value is returned.

ERRORS
       These functions will fail if:

       Domain Error    The x argument is NaN or +-Inf, or the correct value is not representable as an integer.

		       If  the	integer  expression  (math_errhandling & MATH_ERREXCEPT) is non-zero, then the invalid 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), llrint(3M), math.h(3HEAD), attributes(5), standards(5)

SunOS 5.11							    12 Jul 2006 							 lrint(3M)