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

2 files changed, 3 insertions, 6 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
diff --git a/print_rnd_mode.c b/print_rnd_mode.c
index 3be6b9691..199e8780c 100644
--- a/print_rnd_mode.c
+++ b/print_rnd_mode.c
@@ -1,6 +1,6 @@
 /* mpfr_print_rnd_mode -- convert a given rounding mode to a string
 
-Copyright 1999, 2001 Free Software Foundation.
+Copyright 1999, 2001, 2002 Free Software Foundation.
 
 This file is part of the MPFR Library.
 
@@ -19,7 +19,6 @@ along with the MPFR Library; see the file COPYING.LIB.  If not, write to
 the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
 MA 02111-1307, USA. */
 
-#include <stdio.h>
 #include <stdlib.h>
 #include "gmp.h"
 #include "gmp-impl.h"
@@ -38,9 +37,6 @@ mpfr_print_rnd_mode (mp_rnd_t rnd_mode)
       return ("GMP_RNDN"); 
     case GMP_RNDZ:
       return ("GMP_RNDZ"); 
-    default:
-      fprintf (stderr, "unknown rounding mode\n");
-      exit (1);
     }
 
   return NULL;