[RFA/commit 3/3] Fix invalid profile for command-completer in remote-sim.c

[Joel Brobecker <brobecker at adacore dot com>]

The profile of command completers has been change to returna VEC
of char_ptr.  Most completers were updated, except the one in
remote-sim.c.

Unfortunately, to make things a little more difficult, the meat of
the completer is actually implemented in the sim, were VECs are not
available.  This patch thus translates the returned array into a VEC,
and then returns that VEC.

gdb/ChangeLog:

        * remote-sim.c (sim_command_completer): Change type of return
        value to "VEC (char_ptr) *".  Adjust implementation accordingly.

I only lightly tested this patch, because for the erc32-elf sim,
there does not appear to be any completion information.  But GDB
builds again, and does not crash.

I will commit immediatly to fix the build issue for the other
simulators, and fix any problem later.

---
 gdb/remote-sim.c |   16 ++++++++++++++--
 1 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/gdb/remote-sim.c b/gdb/remote-sim.c
index 0e7d84e..11e1003 100644
--- a/gdb/remote-sim.c
+++ b/gdb/remote-sim.c
@@ -1198,16 +1198,28 @@ simulator_command (char *args, int from_tty)
   registers_changed ();
 }
 
-static char **
+static VEC (char_ptr) *
 sim_command_completer (struct cmd_list_element *ignore, char *text, char *word)
 {
   struct sim_inferior_data *sim_data;
+  char **tmp;
+  int i;
+  VEC (char_ptr) *result;
 
   sim_data = inferior_data (current_inferior (), sim_inferior_data_key);
   if (sim_data == NULL || sim_data->gdbsim_desc == NULL)
     return NULL;
 
-  return sim_complete_command (sim_data->gdbsim_desc, text, word);
+  tmp = sim_complete_command (sim_data->gdbsim_desc, text, word);
+  if (tmp == NULL)
+    return NULL;
+
+  /* Transform the array into a VEC, and then free the array.  */
+  for (i = 0; tmp[i] != NULL; i++)
+    VEC_safe_push (char_ptr, result, tmp[i]);
+  xfree (tmp);
+
+  return result;
 }
 
 /* Check to see if a thread is still alive.  */
-- 
1.7.1