llrint man page on Archlinux

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LRINT(3)		   Linux Programmer's Manual		      LRINT(3)

NAME
       lrint,  lrintf,	lrintl,	 llrint,  llrintf,  llrintl - round to nearest
       integer

SYNOPSIS
       #include <math.h>

       long int lrint(double x);
       long int lrintf(float x);
       long int lrintl(long double x);

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

       Link with -lm.

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       All functions shown above:
	   _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE ||
	   _POSIX_C_SOURCE >= 200112L;
	   or cc -std=c99

DESCRIPTION
       These  functions	 round	their  argument	 to the nearest integer value,
       using the current rounding direction (see fesetround(3)).

       Note that unlike the rint(3) family of functions, the  return  type  of
       these functions differs from that of their arguments.

RETURN VALUE
       These functions return the rounded integer value.

       If  x  is a NaN or an infinity, or the rounded value is too large to be
       stored in a long (long long in the case of the ll* functions),  then  a
       domain error occurs, and the return value is unspecified.

ERRORS
       See  math_error(7) for information on how to determine whether an error
       has occurred when calling these functions.

       The following errors can occur:

       Domain error: x is a NaN or infinite, or the rounded value is too large
	      An invalid floating-point exception (FE_INVALID) is raised.

       These functions do not set errno.

VERSIONS
       These functions first appeared in glibc in version 2.1.

ATTRIBUTES
   Multithreading (see pthreads(7))
       The lrint(), lrintf(), lrintl(),	 llrint(),  llrintf(),	and  llrintl()
       functions are thread-safe.

CONFORMING TO
       C99, POSIX.1-2001.

SEE ALSO
       ceil(3), floor(3), lround(3), nearbyint(3), rint(3), round(3)

COLOPHON
       This  page  is  part of release 3.65 of the Linux man-pages project.  A
       description of the project, and information about reporting  bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.

				  2014-01-18			      LRINT(3)
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