fesetround(3) [osx man page]

FEGETROUND(3)						   BSD Library Functions Manual 					     FEGETROUND(3)

NAME

     fegetround, fesetround -- functions providing access to the floating-point rounding mode.

SYNOPSIS

     #include <fenv.h>
     #pragma STDC FENV_ACCESS ON

     int
     fegetround(void);

     int
     fesetround(int round);

DESCRIPTION

     These functions provide control of floating-point rounding direction modes.

     The fegetround() function gets the current rounding direction.  It returns the value of the rounding direction macro representing the current
     rounding direction, or a negative value if either there is no corresponding macro or if the rounding direction is not determinable.

     The fesetround() function sets the rounding direction to be that specified by the argument round.	If the argument is not equal to the value
     of one of the rounding direction macros, the rounding direction is not changed.  It returns zero if and only if the requested rounding direc-
     tion was established.

SEE ALSO

     fenv(3), feclearexcept(3), fegetenv(3), fegetexceptflag(3), feholdexcept(3), fesetenv(3), feraiseexcept(3), fesetexceptflag(3),
     feraiseexcept(3), feupdateenv(3)

STANDARDS

     These functions conform to ISO/IEC 9899:TC3.

BSD
								    May 9, 2011 							       BSD

fegetround(3M)						  Mathematical Library Functions					    fegetround(3M)

NAME

       fegetround, fesetround - get and set current rounding direction

SYNOPSIS

       cc [ flag... ] file... -lm [ library... ]
       #include <fenv.h>

       int fegetround(void);

       int fesetround(int round);

DESCRIPTION

       The fegetround function gets the current rounding direction.

       The  fesetround function establishes the rounding direction represented by its argument round. If the argument is not equal to the value of
       a rounding direction macro, the rounding direction is not changed.

RETURN VALUES

       The fegetround function returns the value of the rounding direction macro representing the current rounding direction, or a negative  value
       if there is no such rounding direction macro or the current rounding direction is not determinable.

       The fesetround function returns a 0 value if and only if the requested rounding direction was established.

ERRORS

       No errors are defined.

EXAMPLES

       The  following  example saves, sets, and restores the rounding direction, reporting an error and aborting if setting the rounding direction
       fails:

       Example 1: Save, set, and restore the rounding direction.

       #include <fenv.h>
       #include <assert.h>
       void f(int round_dir)
       {
	     #pragma STDC FENV_ACCESS ON
	     int save_round;
	     int setround_ok;
	     save_round = fegetround();
	     setround_ok = fesetround(round_dir);
	     assert(setround_ok == 0);
	     /* ... */
	     fesetround(save_round);
	     /* ... */
       }

ATTRIBUTES

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

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

SEE ALSO

       fenv.h(3HEAD), attributes(5), standards(5)

SunOS 5.10							    1 Sep 2002							    fegetround(3M)