2008-12-13 Jerry DeLisle <jvdelisle@gcc.gnu.org>

[pf3gnuchains/gcc-fork.git] / libgfortran / io / write.c

diff --git a/libgfortran/io/write.c b/libgfortran/io/write.c
index 32c5847..3cd67b3 100644 (file)
--- a/libgfortran/io/write.c
+++ b/libgfortran/io/write.c
@@ -600,9 +600,16 @@ write_decimal (st_parameter_dt *dtp, const fnode *f, const char *source,
   sign = calculate_sign (dtp, n < 0);
   if (n < 0)
     n = -n;
-
   nsign = sign == S_NONE ? 0 : 1;
+  
+  /* conv calls gfc_itoa which sets the negative sign needed
+     by write_integer. The sign '+' or '-' is set below based on sign
+     calculated above, so we just point past the sign in the string
+     before proceeding to avoid double signs in corner cases.
+     (see PR38504)  */
   q = conv (n, itoa_buf, sizeof (itoa_buf));
+  if (*q == '-')
+    q++;
 
   digits = strlen (q);