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-rw-r--r--libgfortran/ChangeLog6
-rw-r--r--libgfortran/io/write_float.def16
2 files changed, 22 insertions, 0 deletions
diff --git a/libgfortran/ChangeLog b/libgfortran/ChangeLog
index cf3d9302673..9b2d18d58cf 100644
--- a/libgfortran/ChangeLog
+++ b/libgfortran/ChangeLog
@@ -1,3 +1,9 @@
+2008-10-19 Jerry DeLisle <jvdelisle@gcc.gnu.org
+
+ PR libfortran/37834
+ * io/write_float.def (output_float): Emit '0.' for special case of
+ format specifier 'f0.0' and value of zero. Likewise emit '0' for 'f1.0'.
+
2008-10-17 Jerry DeLisle <jvdelisle@gcc.gnu.org
PR libfortran/37863
diff --git a/libgfortran/io/write_float.def b/libgfortran/io/write_float.def
index 73a6ed14a1b..d55e3799946 100644
--- a/libgfortran/io/write_float.def
+++ b/libgfortran/io/write_float.def
@@ -119,6 +119,22 @@ output_float (st_parameter_dt *dtp, const fnode *f, char *buffer, size_t size,
sign = calculate_sign (dtp, sign_bit);
else
sign = calculate_sign (dtp, 0);
+
+ /* Handle special cases. */
+ if (w == 0)
+ w = 2;
+
+ /* For this one we choose to not output a decimal point.
+ F95 10.5.1.2.1 */
+ if (w == 1 && ft == FMT_F)
+ {
+ out = write_block (dtp, w);
+ if (out == NULL)
+ return;
+ *out = '0';
+ return;
+ }
+
}
/* Normalize the fractional component. */
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