Return a null pointer if rnd_mode is an invalid rounding mode.

git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@1731 280ebfd0-de03-0410-8827-d642c229c3f4

1 files changed, 2 insertions, 1 deletions

diff --git a/mpfr.texi b/mpfr.texi
index 32cc2c8db..271d958a1 100644
--- a/mpfr.texi
+++ b/mpfr.texi
@@ -573,7 +573,8 @@ The precision @var{prec} can be any integer between @code{MPFR_PREC_MIN} and
 
 @deftypefun {char *} mpfr_print_rnd_mode (mp_rnd_t @var{rnd})
 Returns the input string (GMP_RNDD, GMP_RNDU, GMP_RNDN, GMP_RNDZ)
-corresponding to the rounding mode @var{rnd}.
+corresponding to the rounding mode @var{rnd} or a null pointer if
+@var{rnd} is an invalid rounding mode.
 @end deftypefun
 
 @node Exceptions, Initializing Floats, Rounding Modes, Floating-point Functions