[patch, libgfortran] Bug 83191 - [7/8 Regression] Writing a namelist with repeated complex numbers

[Jerry DeLisle <jvdelisle at charter dot net>]

Hi all,

I plan to commit the attached patch with a test case shortly.

It is relatively simple. Thanks to Dominique for pinpointing the location right
away.

Regression tested on x86_64-pc-linux-gnu.

Regards,

Jerry

2017-12-03  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
	    Dominique d'Humieres  <dominiq@lps.ens.fr>

	PR libgfortran/83191
	* io/transfer.c (list_formatted_read_scalar): Do not set
	namelist_mode bit here. (namelist_read): Likewise.
	(data_transfer_init): Clear the mode bit here.
	(finalize_transfer): Do set the mode bit just before any calls
	to namelist_read or namelist_write. It can now be referred to
	in complex_write.
	^ io/write.c (write_complex): Suppress the leading blanks when
	namelist_mode bit is not set to 1.

diff --git a/libgfortran/ChangeLog b/libgfortran/ChangeLog
index 1d4e62434ac..6e77d53961b 100644
--- a/libgfortran/ChangeLog
+++ b/libgfortran/ChangeLog
@@ -1,3 +1,7 @@
+2017-12-02  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
+
+	PR libgfortran/83191
+	
 2017-12-02  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
 
 	PR libgfortran/83225
diff --git a/libgfortran/io/list_read.c b/libgfortran/io/list_read.c
index 3c03a02cad8..379050cecad 100644
--- a/libgfortran/io/list_read.c
+++ b/libgfortran/io/list_read.c
@@ -2099,8 +2099,6 @@ list_formatted_read_scalar (st_parameter_dt *dtp, bt type, void *p,
   int c, i, m;
   int err = 0;
 
-  dtp->u.p.namelist_mode = 0;
-
   /* Set the next_char and push_char worker functions.  */
   set_workers (dtp);
 
@@ -3546,7 +3544,6 @@ namelist_read (st_parameter_dt *dtp)
      name.  */
   namelist_info *prev_nl = NULL;
 
-  dtp->u.p.namelist_mode = 1;
   dtp->u.p.input_complete = 0;
   dtp->u.p.expanded_read = 0;
 
diff --git a/libgfortran/io/transfer.c b/libgfortran/io/transfer.c
index 5429a855541..4d7ca7abf7b 100644
--- a/libgfortran/io/transfer.c
+++ b/libgfortran/io/transfer.c
@@ -2671,7 +2671,7 @@ data_transfer_init (st_parameter_dt *dtp, int read_flag)
 
   dtp->u.p.ionml = ionml;
   dtp->u.p.mode = read_flag ? READING : WRITING;
-
+  dtp->u.p.namelist_mode = 0;
   dtp->u.p.cc.len = 0;
 
   if ((dtp->common.flags & IOPARM_LIBRETURN_MASK) != IOPARM_LIBRETURN_OK)
@@ -3890,6 +3890,7 @@ finalize_transfer (st_parameter_dt *dtp)
   if ((dtp->u.p.ionml != NULL)
       && (cf & IOPARM_DT_HAS_NAMELIST_NAME) != 0)
     {
+       dtp->u.p.namelist_mode = 1;
        if ((cf & IOPARM_DT_NAMELIST_READ_MODE) != 0)
 	 namelist_read (dtp);
        else
diff --git a/libgfortran/io/write.c b/libgfortran/io/write.c
index 582d196c4e3..926d510f4d7 100644
--- a/libgfortran/io/write.c
+++ b/libgfortran/io/write.c
@@ -1809,9 +1809,11 @@ write_complex (st_parameter_dt *dtp, const char *source, int kind, size_t size)
                            precision, buf_size, result1, &res_len1);
   get_float_string (dtp, &f, source + size / 2 , kind, 0, buffer,
                            precision, buf_size, result2, &res_len2);
-  lblanks = width - res_len1 - res_len2 - 3;
-
-  write_x (dtp, lblanks, lblanks);
+  if (!dtp->u.p.namelist_mode)
+    {
+      lblanks = width - res_len1 - res_len2 - 3;
+      write_x (dtp, lblanks, lblanks);
+    }
   write_char (dtp, '(');
   write_float_string (dtp, result1, res_len1);
   write_char (dtp, semi_comma);