write.c (output_float): special check when writing 0.0 with EN and ES formats.

        * write.c (output_float): special check when writing 0.0 with
          EN and ES formats.

        * pr20480.f90: New test.

From-SVN: r96566

gcc/testsuite/ChangeLog

+2005-03-16  Francois-Xavier Coudert  <coudert@clipper.ens.fr>
+
+	PR libfortran/20480
+	* pr20480.f90: New test.
+
 2005-03-16  Richard Henderson  <rth@redhat.com>
 
 	PR middle-end/15700

gcc/testsuite/gfortran.dg/pr20480.f90

+! { dg-do run }
+! PR libfortran/20480
+! fxcoudert@gcc.gnu.org
+  character(len=80) c
+  write (c,'(ES12.3)') 0.0
+  if (trim(adjustl(c)) .ne. '0.000E+00') call abort ()
+  write (c,'(EN12.3)') 0.0
+  if (trim(adjustl(c)) .ne. '0.000E+00') call abort ()
+  end

libgfortran/ChangeLog

+2005-03-16  Francois-Xavier Coudert  <coudert@clipper.ens.fr>
+
+	PR libfortran/20480
+	* write.c (output_float): special check when writing 0.0 with
+	  EN and ES formats.
+
 2005-03-11  Francois-Xavier Coudert  <coudert@clipper.ens.fr>
 
 	PR libfortran/20124

libgfortran/io/write.c

@@ -411,7 +411,8 @@ output_float (fnode *f, double value, int len)
     case FMT_EN:
       /* The exponent must be a multiple of three, with 1-3 digits before
 	 the decimal point.  */
-      e--;
+      if (value != 0.0)
+        e--;
       if (e >= 0)
 	nbefore = e % 3;
       else
@@ -428,7 +429,8 @@ output_float (fnode *f, double value, int len)
       break;
 
     case FMT_ES:
-      e--;
+      if (value != 0.0)
+        e--;
       nbefore = 1;
       nzero = 0;
       nafter = d;