centos man page for llrint

LLRINT(3P)						     POSIX Programmer's Manual							LLRINT(3P)

PROLOG
       This  manual page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may differ (consult the correspond-
       ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

NAME
       llrint, llrintf, llrintl - round to the nearest integer value using current rounding direction

SYNOPSIS
       #include <math.h>

       long long llrint(double x);
       long long llrintf(float x);
       long long llrintl(long double x);

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

       An application wishing to check for error situations should set errno to zero and call feclearexcept(FE_ALL_EXCEPT)  before  calling  these
       functions.   On	return, if errno is non-zero or fetestexcept(FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW) is non-zero, an error
       has occurred.

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

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

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

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

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

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

ERRORS
       These functions shall 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_ERRNO) is non-zero, then errno shall	be  set  to  [EDOM].  If  the  integer	expression
       (math_errhandling & MATH_ERREXCEPT) is non-zero, then the invalid floating-point exception shall be raised.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       On  error,  the	expressions  (math_errhandling & MATH_ERRNO) and (math_errhandling & MATH_ERREXCEPT) are independent of each other, but at
       least one of them must be non-zero.

RATIONALE
       These functions provide floating-to-integer conversions. They round according to the current rounding direction. If the	rounded  value	is
       outside the range of the return type, the numeric result is unspecified and the invalid floating-point exception is raised. When they raise
       no other floating-point exception and the result differs from the argument, they raise the inexact floating-point exception.

FUTURE DIRECTIONS
       None.

SEE ALSO
       feclearexcept(), fetestexcept(), lrint(), the Base Definitions volume of IEEE Std 1003.1-2001, Section 4.18, Treatment of Error	Conditions
       for Mathematical Functions, <math.h>

COPYRIGHT
       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
       ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
       Electrical  and	Electronics  Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE
       and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can  be  obtained
       online at http://www.opengroup.org/unix/online.html .

IEEE
/The Open Group						       2003								LLRINT(3P)