09-02-2006
no need to be sorry. If you came here to learn, we're simply trying to help you pointing you in the right direction - so that the next time you have a question you know where to look first before asking the general audience.
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Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
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LEARN ABOUT OPENSOLARIS
fegetround
fegetround(3M) Mathematical Library Functions fegetround(3M)
NAME
fegetround, fesetround - get and set current rounding direction
SYNOPSIS
c99 [ 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 5.11 12 Jul 2006 fegetround(3M)