[src/{fits_intmax.c,fits_s.h,fits_u.h}] Fixed mpfr_fits_* functions

in a reduced exponent range and debug mode for non-integer numbers
just above the positive limit.

git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@10034 280ebfd0-de03-0410-8827-d642c229c3f4

1 files changed, 6 insertions, 1 deletions

diff --git a/src/fits_intmax.c b/src/fits_intmax.c
index 3e4a07708..3349a13f0 100644
--- a/src/fits_intmax.c
+++ b/src/fits_intmax.c
@@ -99,7 +99,12 @@ mpfr_fits_intmax_p (mpfr_srcptr f, mpfr_rnd_t rnd)
     }
   else
     {
-      res = MPFR_GET_EXP (x) == e;
+      /* Warning! Due to the rounding, x can be an infinity. Here we use
+         the fact that singular numbers have a special exponent field,
+         thus well-defined and different from e, in which case this means
+         that the number does not fit. That's why we use MPFR_EXP, not
+         MPFR_GET_EXP. */
+      res = MPFR_EXP (x) == e;
     }
 
   mpfr_clear (x);